WO2015152211A1

WO2015152211A1 - Artificial nail removal liquid, artificial nail removal method, and nail art kit

Info

Publication number: WO2015152211A1
Application number: PCT/JP2015/060071
Authority: WO
Inventors: 元気高梨; 朋樹落水
Original assignee: 富士フイルム株式会社
Priority date: 2014-03-31
Filing date: 2015-03-31
Publication date: 2015-10-08

Abstract

The purpose of the present invention is to provide an artificial nail removal liquid that shortens removal time, to provide an artificial nail removal method that uses the artificial nail removal liquid, and to provide a nail art kit. According to the present invention, an artificial nail removal liquid is characterized by containing an acid compound as a component (A), a compound that has a hydroxyl group as a component (B), and water as a component (C). The pH of the artificial nail removal liquid is preferably 1-5. The artificial nail removal liquid preferably contains an organic acid as the component (A) and preferably contains a compound that has a hydroxyl value of 5 mmol/g or more as the component (B). According to the present invention, an artificial nail is preferably formed from an artificial nail composition that contains at least one compound selected from the group that comprises a urethane polymer, a polymer that has an amino group, and a monomer that has an amino group.

Description

Artificial nail removal liquid, artificial nail removal method, and nail art kit

The present invention relates to an artificial nail remover, an artificial nail removal method, and a nail art kit.

In recent years, the popularity of nail art for designing hands and toenails has increased, and techniques for forming synthetic resin artificial nails (fake nails, nail tips, etc.) on nails (self nails) have been developed. Recently, a nail decoration called an artificial nail that has been cured by irradiating ultraviolet rays after applying a gel-like decorative curable composition containing a urethane-based resin and a photopolymerizable monomer to the nail has a clear finish. They are attracting attention for reasons such as high adhesion to nails and long-lastingness, and no smell like acrylic resins.
When removing this artificial nail, the surface of the artificial nail is conventionally rubbed with a coarse file (nail file) to make it easy to soak up the removal solution, and then in an organic solvent (removal solution) such as acetone. Place the soaked cotton on the artificial nail, wrap it with aluminum foil, leave it as it is, swell the artificial nail, and then peel off the swollen artificial nail using a stick-like instrument such as a wooden spatula The method is mainstream (see Patent Document 1).
Moreover, the composition described in patent document 2 or 3 is known as a conventional artificial nail composition.

JP 2014-005260 A JP 2009-126833 A JP-A-2-221214

An object of the present invention is to provide an artificial nail removal liquid with a reduced removal time. Another object of the present invention is to provide a method for removing an artificial nail using the artificial nail removing solution and a nail art kit.

The above object has been achieved by the means described in <1>, <12> and <13> below. It is shown below together with <2> to <11> and <14> to <16>, which are preferred embodiments.
<1> An artificial nail removal liquid, comprising an acid compound as component A, a compound having a hydroxyl group as component B, and water as component C,
<2> The removal solution for artificial nails according to <1>, wherein the pH is 1 or more and 5 or less,
<3> The removal liquid for artificial nail according to <1> or <2>, which contains at least one organic acid (more preferably, carboxylic acid) as component A,
<4> The content of Component A in the artificial nail removal liquid is 0.05 to 20% by mass (more preferably 0.1 to 10% by mass, and still more preferably 0.1% by mass relative to the total mass of the artificial nail removal liquid. 5-5% by mass), the removal solution for artificial nails according to any one of <1> to <3>,
<5> The removal for an artificial nail according to any one of <1> to <4>, wherein the component B contains a compound having a hydroxyl value of 5 mmol / g or more (more preferably a compound having 8 mmol / g or more) liquid,
<6> The content of Component B in the artificial nail remover is 0.01 to 20% by mass (more preferably 0.05 to 10% by mass, and still more preferably) with respect to the total mass of the artificial nail remover 0.1-5% by mass), the removal solution for artificial nail according to any one of <1> to <5>,
<7> The artificial nail removal solution according to any one of <1> to <8>, wherein the artificial nail contains a urethane polymer,
<8> The artificial nail removal solution according to any one of <1> to <7>, wherein the artificial nail contains a polymer having an amino group.
<9> The artificial nail removal liquid according to any one of <1> to <8>, wherein the artificial nail is an artificial nail formed of an artificial nail composition containing a polymer having an amino group.
<10> The artificial nail removal liquid according to any one of <1> to <9>, wherein the artificial nail is an artificial nail formed of an artificial nail composition containing a monomer having an amino group.
<11> The artificial nail removal liquid according to any one of <1> to <10>, wherein the artificial nail is an artificial nail formed by curing a photocurable artificial nail composition,
<12> A method for removing an artificial nail, comprising the step of bringing the removal liquid according to any one of <1> to <11> into contact with the artificial nail,
<13> A nail art kit comprising an artificial nail composition and the removal solution for artificial nail according to any one of <1> to <11>,
<14> The nail art kit according to <13>, wherein the artificial nail composition contains a polymer having an amino group.
<15> The nail art kit according to <13> or <14>, wherein the artificial nail composition contains a monomer having an amino group,
<16> The nail art kit according to any one of <13> to <15>, wherein the artificial nail composition is a photocurable artificial nail composition.

According to the present invention, a removal liquid for artificial nails having a reduced removal time is provided. Moreover, the removal method of the artificial nail using the said removal liquid for artificial nails and the nail art kit were provided.

Hereinafter, the present invention will be described in detail.
In the present specification, the description of “xx to yy” represents a numerical range including xx and yy. Further, “(component A) acid compound” or the like is also simply referred to as “component A” or the like.
In the present invention, “mass%” and “wt%” are synonymous, and “part by mass” and “part by weight” are synonymous.
In the following description, the “artificial nail composition” is a composition for forming an artificial nail.
In the present specification, regarding the notation of the group in the compound represented by the formula, when there is no substitution or no substitution, the group can further have a substituent unless otherwise specified. In addition to an unsubstituted group, a group having a substituent is also included. For example, in the description of the formula, if there is a description that “R represents an alkyl group, an aryl group or a heterocyclic group”, “R is an unsubstituted alkyl group, a substituted alkyl group, an unsubstituted aryl group, a substituted aryl group, Represents an unsubstituted heterocyclic group or a substituted heterocyclic group. Moreover, in this specification, (meth) acryl represents the concept containing both acryl and methacryl, and the same applies to (meth) acrylate and the like.
Moreover, the polymer in this specification shall include a copolymer.
In the present invention, a combination of two or more preferred embodiments is more preferred.

(1) Artificial nail removal liquid The artificial nail removal liquid of the present invention (hereinafter also simply referred to as “removal liquid”) includes (Component A) an acid compound, (Component B) a compound having a hydroxyl group, and (Component) C) It contains water.
As described above, conventionally, when removing artificial nails, the surface of the artificial nail is rubbed with a coarse file (nail file) to make it easy to soak up the removal solution, and then an organic solvent such as acetone (removal) The method is to place cotton soaked on the above-mentioned artificial nail, wind it with aluminum foil, leave it as it is to swell the artificial nail, and then peel off this swollen artificial nail using a wooden spatula etc. It was mainstream. However, in this method, since acetone is used, damage to the nails is large, and from the viewpoint of environmental consideration, it is required that the use of a volatile organic solvent is small.

As a result of intensive studies, the present inventors have reduced the use of a volatile organic solvent such as acetone by using a remover containing components A to C, and are shorter than when a conventional remover is used. It has been found that the artificial nail can be removed in time, and the present invention has been completed. Although the detailed mechanism is unknown, by adding a compound having a hydroxyl group to the removal liquid, the affinity between the removal liquid and the artificial nail is improved as compared with the case where an acidic removal liquid is simply used, It is estimated that the removability is improved.
Hereinafter, the component which the removal liquid for artificial nails of this invention contains is explained in full detail.

Component A: Acid compound The removal liquid for artificial nail of the present invention contains an acid compound as Component A. The acid compound is not particularly limited as long as it is a compound having hydrogen dissociable in at least one water.
As the acid compound used in the present invention, any of known organic acids and inorganic acids can be used. From the viewpoint of handleability, an organic acid is preferable, and a carboxylic acid is more preferable.
Examples of the inorganic acid include hydrochloric acid, sulfuric acid, nitric acid, perchloric acid, carbonic acid, phosphoric acid and the like. Carbonic acid and phosphoric acid are preferable, and carbonic acid is more preferable.
Examples of the organic acid include carboxylic acid, sulfonic acid, sulfuric acid monoester, phosphoric acid monoester, phosphoric diester, phosphonic acid and the like, carboxylic acid, sulfonic acid, phosphoric monoester, and phosphonic acid are preferable, and carboxylic acid is More preferred.
Specific examples of carboxylic acids include formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, palmitic acid, margaric acid, stearic acid, Glycolic acid, lactic acid, tartronic acid, glyceric acid, hydroxybutyric acid, 2-hydroxybutyric acid, 3-hydroxybutyric acid, γ-hydroxybutyric acid, malic acid, tartaric acid, citramalic acid, citric acid, leucine acid, meparonic acid, pantoic acid, ricinol Acid, cerebronic acid, quinic acid, shikimic acid, salicylic acid, panillic acid, syringic acid, resorcylic acid, protocatechuic acid, gentisic acid, gallic acid, mandelic acid, benzylic acid, atrolactic acid, mellilotic acid, furoletic acid, coumaric acid, Umberic acid, caffeic acid, ferulic acid, cinnamic acid, etc. It is below, but not limited thereto. Particularly preferred are carboxylic acids used in cosmetics. Specific examples include, but are not limited to, acetic acid, formic acid, propionic acid, glycolic acid, citric acid, lactic acid, malic acid, amino acids and the like.
Among these, citric acid, glycolic acid, malic acid, and acetic acid are particularly suitable.

The content of the acid compound in the removal liquid is not particularly limited, but is preferably 0.05 to 20% by mass and more preferably 0.1 to 10% by mass with respect to the total mass of the removal liquid. Preferably, the content is 0.5 to 5% by mass.

Component B: Compound having a hydroxyl group The removal liquid for artificial nail of the present invention contains a compound having a hydroxyl group as Component B.
As the compound having a hydroxyl group, any known alkyl alcohol and water-soluble aryl alcohol (phenols) can be preferably used.
The compound having a hydroxyl group preferably has a molecular weight of 32 to 2,000. The molecular weight is more preferably 1,500 or less, and still more preferably 1,000 or less.
Moreover, the compound whose hydroxyl value is 5 mmol / g or more is preferable, the compound which is 7 mmol / g or more is more preferable, and the compound which is 8 mmol / g or more is still more preferable.
The hydroxyl value is calculated using the following calculation formula.

Component B is a compound having no acid group. A compound having an acid group and a hydroxyl group (for example, citric acid, lactic acid, malic acid, etc.) corresponds to Component A.

Specific examples of component B include methanol, ethanol, isopropyl alcohol, n-butanol, t-butanol, hexanol, ethylene glycol, propylene glycol, 1,3-butanediol, pentanediol, cyclohexanediol, glycerol, trimethylolpropane, Examples include inositol, pentaerythritol, diglycetine, dipropylene glycol, tripropylene glycol, sorbitol, glucose, sucrose, polyethylene glycol, polyvinyl alcohol, phenol, catechol, and polyoxyethylene polyoxypropylene glycol.
Component B is preferably one generally used in cosmetics, and specifically includes ethanol, isopropanol, n-butanol, t-butanol, ethylene glycol, propylene glycol, 1,3-butanediol, glycerol, pentane. Examples include, but are not limited to, diols. Of these, ethanol, 1,3-butaneoyl, and isopropanol are particularly preferred.

The content of component B in the removal liquid is not particularly limited, but is preferably 0.01 to 20% by mass and more preferably 0.05 to 10% by mass with respect to the total mass of the removal liquid. Preferably, the content is 0.1 to 5% by mass.

(Component C) Water The artificial nail removal solution of the present invention contains water as Component C.
There is no restriction | limiting in particular in the water used for a removal liquid, A tap water, distilled water, ion-exchange water etc. can be used. The content of water in the removal liquid is not particularly limited, but is preferably 50 to 99.5% by mass, more preferably 70 to 99% by mass, based on the total mass of the removal liquid. More preferably, it is -98 mass%.

(Other ingredients)
[Acid salt]
In order to prevent the pH of the artificial nail removal solution of the present invention from fluctuating due to external factors such as aging, dilution or concentration of the solution, an acid salt is preferably added to form a buffer solution. In order to make a buffer solution, a method of coexisting an acid component (acid compound) salt, preferably a sodium salt (sodium citrate, sodium gluconate, sodium carbonate, sodium phosphate, etc.) with an acid may be mentioned. However, it is not particularly limited.

The removal liquid of the present invention may contain other components as required in addition to the above components. Specific examples include surfactants, pH buffers, preservatives, fragrances, water-soluble polymers, rust inhibitors, organic solvents, antifoaming agents, wetting agents, hard water softeners, stabilizers, thickeners, and the like. .

(Mode of use)
The removal liquid of the present invention may be a concentrated liquid from the viewpoints of cost, transportability, and storability, and may be an embodiment in which the concentrated liquid is diluted with water or the like when used. Moreover, you may mix each raw material powder and each stock solution just before using a removal liquid.
In addition, preferable content of said each component means content at the time of use.

(PH)
The pH of the removal liquid is preferably 5.0 or less, more preferably 4.0 or less, and even more preferably 3.0 or less. In addition, the pH of the removal liquid is preferably 1.0 or more, and more preferably 2.0 or more, from the viewpoint of safety to the skin and nails.

(temperature)
The removal liquid may be used after being heated to such an extent that safety is not impaired. In addition, when the artificial nail is immersed in the removal liquid, the immersion liquid may be stirred.

(2) Artificial nail removal method The artificial nail removal method of the present invention includes a step of removing the artificial nail by contacting the removal liquid of the present invention (removal step).
The artificial nail removal method of the present invention can be easily removed by bringing the artificial nail into contact with the removal liquid of the present invention instead of the conventional organic solvent such as acetone.
The method of contact is not particularly limited, and the artificial nail may be directly immersed in the removing liquid, the artificial nail may be wrapped with cotton dampened with the removing liquid, or sprayed with a sprayer or a shower. . However, it is not limited to these examples.
Moreover, it is preferable that the removal method of the artificial nail of this invention includes the process of scratching the surface and / or front-end | tip of an artificial nail.
Although there is no restriction | limiting in particular as a method to make a damage | wound, A nail file, such as a file, can be used suitably.

A preferred specific example of the removal method is shown below. In other words, the surface and / or tip of the artificial nail is arbitrarily rubbed with a nail file and then immersed in the removal solution of the present invention and left for about 1 to 5 minutes to change the solubility of the artificial nail. Fingertips and nails by (I) methods of wiping artificial nails with a cloth or non-woven fabric, (II) methods of peeling with a spatula or stick-like instrument, or (III) methods of picking up with tweezers or tweezers Can be peeled off very easily and safely.

In addition, wiping, peeling off, picking up, etc. can be carried out while immersing in the above method, so that it can be removed more quickly. Further, removal may be promoted by applying ultrasonic waves or vibrations.
In addition, the artificial nail removal method of the present invention may include other known steps.

(3) Nail Art Kit The nail art kit of the present invention includes an artificial nail composition and an artificial nail removal liquid, and the artificial nail removal liquid is the removal liquid of the present invention.
The preferred embodiment of the removing solution in the nail art kit of the present invention is the same as described above.
Moreover, the nail art kit of this invention may contain arbitrary goods other than the said artificial nail composition and a removal liquid.
For example, an artificial nail composition for color or top, a nail file such as a file, a brush or brush such as a flat brush for applying an artificial nail composition, an exposure device such as a UV light, a wiping or cleaning liquid , Wipes for wiping, nail brushes, dust brushes, nail foams used for lengthening nails, decorative stones such as acrylic, glass, metal or natural stone, decorative powders such as nail seals, glitters and holograms , A cutter, a spatula, a stick, a separator that widens the distance between fingers in order to prevent contact between the nails, and the like, but is not limited thereto.

Next, the artificial nail and the artificial nail composition in which the removing liquid of the present invention is preferably used will be described in detail.
(Artificial nail composition)
In the present invention, the artificial nail composition is a composition which is cured by drying and / or exposure on a human or animal nail or other artificial nail to form an artificial nail. Moreover, the artificial nail | claw formed with the artificial nail composition can be easily removed with the removal liquid of this invention.
The artificial nail in the present invention refers to a layer formed on a human or animal nail for the purpose of beauty and / or protection. In addition, for example, the other artificial nail includes a resin base material having an arbitrary shape for the purpose of nail decoration and / or protection.
“Human and animal nails and other artificial nails” are also simply referred to as “nails”.

In the present invention, the artificial nail is preferably nail polish such as manicure or pedicure, or gel nail. In the present invention, the artificial nail may have a multilayer structure, and may have a primer layer, a base layer, a color layer, and / or a top layer.
In addition, in this invention, it is preferable that the layer formed with the artificial nail composition used suitably for this invention mentioned later is a layer which is in contact with the nail | claw.

There is no restriction | limiting in particular in the shape of the said artificial nail, What is necessary is just to form in a desired shape. For example, it may be formed so as to cover the surface of the nail, it may be formed only on a part of the nail, or it is formed in a shape larger than the nail by using a nail foam or the like to extend the nail. May be.
Further, the thickness of the artificial nail can be controlled by the application amount of the artificial nail composition. The thickness is not particularly limited as long as it is generally within the range of an artificial nail, but it is preferably 10 to 2,000 μm from the viewpoint of practicality and removability, and is preferably 20 to 1,500 μm. More preferred is 20 to 1,000 μm.

The removal liquid of the present invention is suitable for removing an artificial nail having an amino group, and particularly suitable for removing an artificial nail containing a polymer having an amino group. As the artificial nail containing a polymer having an amino group, the following artificial nails (i) to (iii) are preferably exemplified.
(I) Artificial nail obtained by drying an artificial nail composition containing a polymer having an amino group as component a (ii) Photocuring an artificial nail composition containing a polymer having an amino group as component a Artificial nail obtained by photocuring an artificial nail composition containing a monomer having an amino group as the artificial nail (iii) component b obtained as described above. An artificial nail formed by an artificial nail composition containing a polymer having an amino group and / or a monomer having an amino group is preferable.
Here, the aspect (i) is an artificial nail formed by drying, and the artificial nail composition is a so-called artificial nail composition for nail polish. On the other hand, the above aspects (ii) and (iii) are artificial nails formed by photocuring, and the artificial nail composition is a so-called photocurable artificial nail composition (“artificial nail composition for gel nail”). ). The photocurable artificial nail composition is an artificial nail composition curable by actinic rays. “Actinic light” is radiation that can give energy to generate a starting species in the artificial nail composition by irradiation, and includes ultraviolet light, visible light, and the like. Among these, ultraviolet rays are preferable.

In the above aspects (i) and (ii), an artificial nail composition is formed using component n: an artificial nail composition containing a polymer having an amino group, and the amino group derived from component a is an artificial nail. Present in. On the other hand, in the embodiment of (iii) above, an artificial nail composition containing component b: a monomer having an amino group is photocured to form an artificial nail, and the monomer having an amino group is polymerized to form a polymer. Then, amino groups derived from monomers having amino groups are introduced into the polymer.
Thus, the removal liquid of the present invention is suitable for removing artificial nails having amino groups, in particular, artificial nails containing a polymer having amino groups, and as an artificial nail composition for forming the artificial nails. Preferably contains a polymer having an amino group as component a and / or a monomer having an amino group as component b.

In the above aspect (i), the artificial nail composition preferably contains an organic solvent in addition to component a: a polymer having an amino group.
In the above aspect (ii), the artificial nail composition preferably further contains a polymerizable compound and a polymerization initiator in addition to component a: an amino group-containing polymer.
In the embodiment (iii), the artificial nail composition preferably contains a polymerization initiator in addition to the component b: a monomer having an amino group, and further contains a polymer component (film forming agent). Is preferred.
In the embodiment (ii), it is excluded that the polymerizable compound further contains a monomer having an amino group, and in the embodiment (iii), a polymer component having an amino group is contained as the polymer component. It goes without saying that it is not something you do.

In the present invention, as another preferred embodiment of the artificial nail, (iv) acrylic polymer, urethane polymer, cellulose polymer, ester polymer, amide polymer, vinyl polymer, ether polymer, styrene polymer, carbonate type Examples thereof include an artificial nail containing at least one polymer selected from the group consisting of a polymer, a urea polymer, an ethylene polymer, and an amine polymer. The inclusion of these polymers is preferable because of excellent adhesion and removability. Among these, it is particularly preferable to contain a urethane polymer (urethane polymer, polyurethane). The artificial nail is preferably an artificial nail formed from an artificial nail composition containing the polymer. In the above aspect (iv), the artificial nail composition may not contain a polymer having an amino group or a monomer having an amino group. In the above aspect (iv), the artificial nail composition preferably contains an organic solvent or a polymerizable compound and a polymerization initiator in addition to the above polymer. It is more preferable to contain a functional compound and a polymerization initiator.
In the above aspects (i) and (ii), the polymer having an amino group is preferably one of the above-mentioned polymers, and more preferably a urethane polymer. Moreover, in the aspect of said (iii), it is preferable to contain any one of said polymers as a polymer component, and it is more preferable to contain a urethane polymer.
Hereinafter, after describing the aspects (i) and (ii) for various components contained in the artificial nail composition, the aspects (iii) and (iv) will be described.
In the following description, the polymer includes a copolymer and an oligomer. The weight average molecular weight of the polymer is preferably 2,000 or more and 300,000 or less, more preferably 3,000 or more and 200,000 or less, and further preferably 4,000 or more and 100,000 or less. Preferably, it is 5,000 or more and 50,000 or less. It is excellent in the adhesiveness of the hardened | cured material obtained, and removability, and temporal stability as it is the said range.

-Aspect of (i) or (ii)-
Component a: Polymer having an amino group In the present invention, in the embodiment (i) or (ii), the artificial nail composition contains a polymer having an amino group as the component a.
The weight average molecular weight of component a is preferably 2,000 or more and 300,000 or less, more preferably 3,000 or more and 200,000 or less, and further preferably 4,000 or more and 100,000 or less. Preferably, it is 5,000 or more and 50,000 or less. It is excellent in the adhesiveness and removability of the obtained artificial nail as it is the said range, and is excellent in temporal stability.
In addition, component a may have an ethylenically unsaturated group. When component a has an ethylenically unsaturated group, the ethylenically unsaturated group may be present in any of the main chain, side chain, and terminal of the polymer in component a.

The amino group in component a may be any of a primary amino group, a secondary amino group, and a tertiary amino group, but is preferably a secondary amino group or a tertiary amino group, More preferably, it is a tertiary amino group. In the above embodiment, the resulting artificial nail is excellent in removability and water resistance, and is easy to synthesize.
Component a may have an amino group in the main chain of the polymer or in the side chain, but is preferably a polymer having an amino group in the side chain from the viewpoint of synthesis. .
Component a may have one type of amino group or two or more types.
The “monomer unit” in the present invention includes not only a strict monomer-derived constituent unit but also a monomer unit modified by a polymer reaction in which a reaction such as modification is performed after a polymer is obtained.

Component a is preferably a polymer having a structure represented by the following formula I, and more preferably a polymer having a structure represented by the following formula I in the side chain.

(In Formula I, R ¹ and R ² each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and at least two selected from the group consisting of R ¹ , R ² and L ¹ are linked to each other. A ring may be formed, L ¹ represents a divalent linking group, and a wavy line represents a bonding position with another structure.)

R ¹ and R ² in Formula I are each independently preferably an alkyl group having 1 to 10 carbon atoms, and is a methyl group or an ethyl group, from the viewpoint of the balance between solubility in an aqueous acid solution and water resistance. It is particularly preferred.
In Formula I, at least two selected from the group consisting of R ¹ , R ² and L ¹ may be linked to each other to form a ring.
L ¹ in Formula I is an alkylene group having 1 to 20 carbon atoms which may have a substituent, and a part of the carbon atoms may be replaced with a heteroatom from the viewpoint of the film property of the polymer. It is preferably an alkylene group having 1 to 20 carbon atoms, an oxyalkylene group having 2 to 20 carbon atoms, or a polyoxyalkylene group having 2 to 20 carbon atoms, and an alkylene group having 1 to 20 carbon atoms or It is more preferably a polyoxyalkylene group having 2 to 20 carbon atoms, particularly preferably an alkylene group having 1 to 20 carbon atoms, and most preferably an alkylene group having 2 or 3 carbon atoms.
The heteroatom is preferably a nitrogen atom or an oxygen atom, and more preferably an oxygen atom. Moreover, when the said hetero atom is a nitrogen atom, it is preferable that the remaining group on a nitrogen atom is a hydrogen atom or an alkyl group, and it is more preferable that it is an alkyl group.

Further, as a method for introducing the structure represented by the above formula I into the side chain of the polymer, for example, a monomer having the structure represented by the formula I is subjected to condensation polymerization, addition polymerization, addition condensation, ionic polymerization (cationic polymerization, Examples thereof include a method of polymerizing using a known polymerization reaction such as anionic polymerization.

The polymer structure in component a is not particularly limited as long as it is a desired polymer structure. For example, an acrylic polymer, a urethane polymer, a cellulose polymer, an ester polymer, an amide polymer, a vinyl polymer, and an ether polymer. And polymer structures such as styrene polymer, carbonate polymer, urea polymer, ethylene polymer, and amine polymer.
From the viewpoint of film properties, handleability (viscosity), and amino group-introducing synthesis, component a may be an ether polymer, an ethylene polymer (particularly a polyethyleneimine polymer), a urethane polymer, or an acrylic polymer. A urethane polymer and an acrylic polymer are particularly preferable, and an acrylic polymer is most preferable.
Further, from the viewpoint of flexibility and removability of the cured film, a urethane polymer is most preferable.

Examples of the acrylic polymer include known acrylic acid derivatives (for example, acrylic esters such as methyl acrylate and ethyl acrylate, acrylic amides such as acrylamide and acryloylmorpholine), and methacrylic acid derivatives (for example, methyl methacrylate, methacrylic acid). Any polymer can be suitably used as long as it is a polymer obtained by polymerizing a methacrylic acid ester such as ethyl or a methacrylic acid amide such as methacrylamide or isopropylamide. However, it is not limited to these examples. Examples of the method for introducing an amino group into the acrylic polymer include a method for polymerizing or copolymerizing a (meth) acrylic acid derivative having an amino group, and a method for introducing an amino group by a polymer reaction. Examples of a method for introducing an ethylenically unsaturated group into an acrylic polymer include a method for polymerizing or copolymerizing a (meth) acrylic acid derivative having an ethylenically unsaturated group, and a method for introducing an ethylenically unsaturated group by a polymer reaction. The method to introduce is mentioned.

Urethane polymers include known polyisocyanate compounds (for example, methylene diisocyanate, hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, phenyl diisocyanate, tolylene diisocyanate, diphenylmethane diisocyanate, tolidine diisocyanate, naphthalene diisocyanate, triphenylmethane triisocyanate, tris ( Phenyl isocyanate) thiophosphate, phenylene diisocyanate, lysine diisocyanate, xylylene diisocyanate, bis (isocyanatomethyl) cyclohexane, dicyclohexylmethane diisocyanate, isopropylidenebis (cyclohexyl isocyanate), isophorone diisocyanate, dianisidine diisocyanate Diphenyl ether diisocyanate) and known polyol compounds (for example, alkylene diols such as butanediol and hexanediol, arylene diols such as p-hydroxystyrene, polyether diols such as polyethylene glycol and polypropylene glycol, polyester diols such as polyethylene glycol terephthalate, Any polyurethane can be suitably used as long as it is a polyurethane comprising a polycarbonate diol such as polyethylene glycol carbonate. However, it is not limited to these examples.
Examples of a method for introducing an amino group into a urethane polymer include a method of performing polycondensation using a polyisocyanate compound and / or a polyol compound having a tertiary amino group or a group in which an amino group is protected, and a polymer reaction. The method of introduce | transducing an amino group by is mentioned. The protected amino group may be deprotected by a known method after forming a polymer. The same applies to the following.
Examples of the method of introducing an ethylenically unsaturated group into a urethane polymer include a method of introducing by a polymer reaction and a method of polycondensation using a polyol compound or a polyisocyanate compound having an ethylenically unsaturated group. It is done. These compounds are not particularly limited, but for polyols having an ethylenically unsaturated group, (meth) acrylate-containing diol compounds as described in JP 2010-100047 can be preferably used. .
Among these, from the viewpoint of water resistance, a urethane polymer having a polycarbonate structure or a polyester structure, a polybutadiene structure, or a hydrogenated polybutadiene structure is preferable, and a urethane polymer having a polycarbonate structure is more preferable.

Moreover, as a urethane type polymer, the polycondensate of a diisocyanate compound and a diol compound can illustrate preferably.
As the diol component constituting the urethane polymer, it is preferable to use polycarbonate diol, polyester diol, polybutadiene diol, and hydrogenated polybutadiene diol from the viewpoint of water resistance, and it is more preferable to use polycarbonate diol.
The diisocyanate component is composed of hexamethylene diisocyanate, tolylene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane-4,4′- from the viewpoint of the solubility of the artificial nail composition and the mechanical strength of the artificial nail to be formed. Diisocyanates are preferred, and isophorone diisocyanate, methylene diphenyl diisocyanate, and dicyclohexylmethane-4,4′-diisocyanate are more preferred. These compounds may be used alone or in combination.
Further, in addition to the above preferred diol component / diisocyanate component, it may be used in combination with other diol component / diisocyanate component. Further, by using a suitable diol component and a suitable diisocyanate component together, both the water resistance and mechanical strength of the artificial nail can be enhanced.

As the cellulose polymer, any known cellulose such as carboxymethylcellulose, nitrocellulose, triacetylcellulose, and the like can be preferably used. However, it is not limited to these examples. Examples of a method for introducing an amino group into a cellulose polymer include a method for introducing an amino group by a polymer reaction. Examples of the method for introducing an ethylenically unsaturated group into a cellulose polymer include a method for introducing an ethylenically unsaturated group by a polymer reaction.

As the ester polymer, any polyester comprising a known polycarboxylic acid compound (for example, succinic acid, adipic acid, phthalic acid, etc.) and a known polyol compound can be suitably used. In addition, polyesters composed of hydroxycarboxylic acid compounds such as polylactic acid can also be suitably used. However, it is not limited to these examples. Examples of a method for introducing an amino group into an ester polymer include polycondensation using a polycarboxylic acid compound, a polyol compound and / or a hydroxycarboxylic acid compound having a tertiary amino group or a group with a protected amino group. And a method of introducing an amino group by a polymer reaction. Examples of a method for introducing an ethylenically unsaturated group into an ester polymer include a method for introducing an ethylenically unsaturated group by a polymer reaction.

As the amide polymer, any polyamide can be suitably used as long as it is a polyamide comprising a known polycarboxylic acid compound and a known polyamine compound (for example, ethylenediamine, phenylenediamine, etc.). In addition, polyamino acids, which are proteins composed of amino acids, can also be preferably used. However, it is not limited to these examples. Examples of the method for introducing an amino group into the amide polymer include a polycarboxylic acid compound having a tertiary amino group or a group in which the amino group is protected, and / or a tertiary amino group that does not contribute to the polycondensation reaction. Alternatively, a method of polycondensation using a polyamine compound having a group in which an amino group is protected and a method of introducing an amino group by a polymer reaction can be mentioned. Examples of the method for introducing an ethylenically unsaturated group into an amide polymer include a method for introducing an ethylenically unsaturated group by a polymer reaction.

As the vinyl polymer, any vinyl polymer obtained by polymerizing a known vinyl compound (for example, vinyl acetate, vinyl chloride, butadiene, etc.) can be suitably used. However, it is not limited to these examples. Examples of the method for introducing an amino group into a vinyl polymer include a method of polymerizing or copolymerizing a vinyl compound having an amino group, and a method of introducing an amino group by a polymer reaction. Examples of the method for introducing an ethylenically unsaturated group into a vinyl polymer include a method for introducing an ethylenically unsaturated group by a polymer reaction.

As the ether polymer, any polyether (for example, polyethylene glycol, polypropylene glycol, etc.) made of a known polyol compound can be suitably used. However, it is not limited to these examples. Examples of a method for introducing an amino group into an ether-based polymer include a method of polycondensation using a polyol compound having a tertiary amino group or a group in which the amino group is protected, and a method of introducing an amino group by a polymer reaction. Is mentioned. Examples of a method for introducing an ethylenically unsaturated group into an ether polymer include a method for introducing an ethylenically unsaturated group by a polymer reaction.

As the styrene-based polymer, any polystyrene can be suitably used as long as it is made of a known styrene compound (for example, styrene, 4-carboxystyrene, 4-acetoxystyrene, etc.). However, it is not limited to these examples. Examples of the method for introducing an amino group into the styrene polymer include a method for polymerizing or copolymerizing a styrene derivative having an amino group, and a method for introducing an amino group by a polymer reaction. Examples of a method for introducing an ethylenically unsaturated group into a styrenic polymer include a method for introducing an ethylenically unsaturated group by a polymer reaction.

As the carbonate-based polymer, any polycarbonate can be suitably used as long as it is a polycarbonate composed of a known carbonic acid derivative (for example, phosgene, dimethyl carbonate, dimethyl carbonate, etc.) and a known polyol compound. However, it is not limited to these examples. Examples of a method for introducing an amino group into a carbonate-based polymer include a method of polycondensation using a polyol compound having a tertiary amino group or a group in which the amino group is protected, and a method of introducing an amino group by a polymer reaction. Is mentioned. Examples of the method for introducing an ethylenically unsaturated group into the carbonate polymer include a method for introducing an ethylenically unsaturated group by a polymer reaction.

As the urea polymer, any polyurea composed of a known polyisocyanate compound and a known polyamine compound can be suitably used. However, it is not limited to these examples. Examples of the method for introducing an amino group into the urea polymer include a polyisocyanate compound having a tertiary amino group or a group in which the amino group is protected, and / or a tertiary amino group that does not contribute to the polycondensation reaction, or Examples thereof include a method of polycondensation using a polyamine compound having a group in which an amino group is protected, and a method of introducing an amino group by a polymer reaction. Examples of a method for introducing an ethylenically unsaturated group into a urea polymer include a method for introducing an ethylenically unsaturated group by a polymer reaction.

Examples of the amine polymer include known polyamines. Examples of a method for introducing an ethylenically unsaturated group into an amine polymer include a method for introducing an ethylenically unsaturated group by a polymer reaction.
Component a may be a copolymer such as a styrene-acrylic copolymer.

Component a is preferably a homopolymer or copolymer of a monofunctional (meth) acrylate compound or a polycondensate of a diisocyanate compound and a diol compound from the viewpoint of gloss.

The homopolymer or copolymer of the monofunctional (meth) acrylate compound mentioned as component a is represented by the following formula II from the viewpoint of film properties, handleability (viscosity), and synthesis for introducing an amino group. It is preferable that the polymer has a monomer unit.

(In Formula II, R ¹ and R ² each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and at least two selected from the group consisting of R ¹ , R ² and L ¹ are linked to each other. And L ¹ represents a divalent linking group, R ³ represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and X represents an oxygen atom or an NH group.)

R ^1, R ² and L ¹ in formula II are each R ^1, R ² and L ¹ synonymous in the formula (I), the preferred embodiment is also the same.
R ³ in Formula II is preferably a hydrogen atom or a methyl group, and more preferably a methyl group, from the viewpoint of synthesis.
X in Formula II is preferably an oxygen atom from the viewpoint of water resistance and synthesis of the resulting artificial nail.

When the component a has a monomer unit represented by the formula II, it may be used singly or in combination of two or more, or may further have other monomer units.
Examples of the monomer that forms the monomer unit represented by the formula II include compounds represented by the following formula II-m.

(In Formula II-m, R ¹ and R ² each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R ¹ and R ² or L ¹ and R ² are linked to each other to form a ring. L ¹ represents a divalent linking group, R ³ represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and X represents an oxygen atom or an NH group.)

R ^¹ ~ R ^3, L ¹ and X in formula II-m are each a R ^¹ ~ R ^3, L ¹ and X synonymous in above-mentioned formula (II), preferable embodiments thereof are also the same.

In addition, as a homopolymer or copolymer of a monofunctional (meth) acrylate compound, from the viewpoint of water resistance of the resulting artificial nail, other than the monomer unit having the amino group and the monomer unit having the amino group, A polymer having at least a monomer unit derived from a water-insoluble monomer is preferable. The definition of non-water-soluble refers to that in which a mixed solution with the same volume of pure water maintains a non-uniform appearance under the conditions of 1 atm and 20 ° C.
As a water-insoluble monomer, a styrene compound and a (meth) acrylic acid derivative are preferable, a (meth) acrylic acid derivative is more preferable, and a (meth) acrylic acid alkyl ester is particularly preferable.
That is, component a preferably has a monomer unit derived from a compound selected from the group consisting of a styrene compound and a (meth) acrylic acid derivative, in addition to the monomer unit having an amino group, and is derived from a (meth) acrylic acid derivative. It is more preferable to have a monomer unit, and it is still more preferable to have a monomer unit derived from an alkyl (meth) acrylate.

In the production of a homopolymer or copolymer of a monofunctional (meth) acrylate compound, preferred monomers that can be copolymerized with a monomer having an amino group include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, Monofunctional (meth) acrylates such as 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxyethyl (meth) acrylamide, isopropylacrylamide, morpholine Monofunctional (meth) acrylic amides such as acrylamide, vinyl monomers such as N-vinyl pyrrolidone and vinyl acetate, ethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethy Glycol di (meth) acrylate, propylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, Polyfunctional (meth) acrylic acid esters such as dipentaerythritol hexa (meth) acrylate, 1,6-hexanediol di (meth) acrylate, cardoepoxy di (meth) acrylate, neopentyl glycol di (meth) acrylate, Examples thereof include urethane (meth) acrylates composed of diisocyanate, a hydroxyl group-containing (meth) acrylic acid derivative, and optionally diols. However, it is not limited to these examples.

In addition, the component a preferably further has a monomer unit represented by the following formula IV in addition to the monomer unit having an amino group, from the viewpoint of water resistance of the artificial nail to be obtained.

(In formula IV, R ⁶ represents a hydrogen atom, an alkyl group or a group represented by the following formula V, R ⁷ represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and X ′ represents an oxygen atom or an NH group. Represents.)

(In Formula V, L ⁴ independently represents an ethylene group or a propylene group, n represents an integer of 1 to 20, R ⁸ represents a hydrogen atom or an alkyl group, and the wavy line represents the bond with X ′ above. Represents the position.)

R ⁶ is preferably an alkyl group or a group represented by the above formula V from the viewpoint of water resistance of the resulting artificial nail, and is an alkyl group having 1 to 20 carbon atoms or a group represented by the above formula V. More preferred is an alkyl group having 3 to 10 carbon atoms, and particularly preferred is a butyl group.
R ⁷ is preferably a hydrogen atom or a methyl group, and more preferably a methyl group, from the viewpoint of synthesis.
X ′ is preferably an oxygen atom from the viewpoint of water resistance and synthesis of the resulting artificial nail.
L ⁴ is preferably an ethylene group.
n is preferably an integer of 1 to 10 from the viewpoint of the water resistance of the resulting artificial nail.
R ⁸ is preferably an alkyl group having 1 to 10 carbon atoms, and more preferably a methyl group, from the viewpoint of water resistance of the resulting artificial nail.

Although the specific example of the homopolymer or copolymer of a monofunctional (meth) acrylate compound is shown below, it is not limited to this specific example.
As a homopolymer or copolymer of a monofunctional (meth) acrylate compound, a polymer having the following structure is preferable, and a polymer having the following structure and a weight average molecular weight is more preferable. Moreover, the number on the lower right of the parenthesis of each monomer unit represents a molar ratio. The number on the lower right of the parentheses in the alkyleneoxy chain represents the number of repetitions. Moreover, the structural unit described with * shows that the main chain terminal of this polymer has the said structure couple | bonded with the main chain by *.

In addition, the polycondensate of the diisocyanate compound and the diol compound mentioned as component a is represented by the following formula III or formula III-b from the viewpoint of film properties, handleability (viscosity), and synthesis for introducing an amino group. A polymer having a monomer unit is preferable, and a urethane polymer having a monomer unit represented by the following formula III is more preferable.

(In Formula III or Formula III-b, R ⁴ , R ⁵ and R ^b4 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and are selected from the group consisting of R ⁴ , R ⁵ and L ^3. At least two of them may be connected to each other to form a ring, R ^b4 and L ^b3 may be connected to each other to form a ring, L ² represents a trivalent linking group, and L ³ Represents an alkylene group having 1 to 20 carbon atoms, and L ^b3 independently represents an alkylene group having 1 to 20 carbon atoms.)

In formula III, R ⁴ and R ⁵ are each independently preferably an alkyl group having 1 to 10 carbon atoms from the viewpoint of a balance between solubility in an aqueous acid solution and water resistance, and is a methyl group or an ethyl group. It is particularly preferred.
In Formula III, at least two selected from the group consisting of R ⁴ , R ⁵ and L ³ may be connected to each other to form a ring.
L ² in Formula III is preferably a trivalent linking group having 2 to 20 carbon atoms, more preferably a trivalent hydrocarbon group having 2 to 20 carbon atoms, and 3 having 2 to 20 carbon atoms. It is more preferably a valent aliphatic hydrocarbon group, particularly preferably a trivalent aliphatic hydrocarbon group having 2 to 10 carbon atoms, each having two oxygen atoms in Formula III at the 1-position and 2-position, respectively. Most preferred is a 1,1,2-ethanetriyl group to be bonded.
L ³ in Formula III is preferably an alkylene group having 1 to 4 carbon atoms, and particularly preferably a methylene group, from the viewpoint of the coating properties of the polymer.
R ^b4 in formula III-b is preferably an alkyl group having 1 to 10 carbon atoms, and preferably an alkyl group having 2 to 8 carbon atoms, from the viewpoint of the balance between solubility in an aqueous acid solution and water resistance. Is more preferable, an alkyl group having 4 to 8 carbon atoms is more preferable, and an n-butyl group is particularly preferable.
In the formula III-b, L ^b3 is each independently preferably an alkylene group having 2 to 8 carbon atoms, particularly preferably an ethylene group, from the viewpoint of the coating properties of the polymer.
Further, from the viewpoint of synthesis, the two L ^b3 are preferably the same group.
In Formula III-b, R ^b4 and L ^b3 may be connected to each other to form a ring.

When component a has a monomer unit represented by formula III or formula III-b, it may be used singly or in combination of two or more, or may be further contained Preferred examples of the monomer unit include a monomer unit derived from a diisocyanate component described later.
Examples of the monomer that forms the monomer unit represented by the formula III include compounds represented by the following formula III-m.
Examples of the monomer that forms the monomer unit represented by the formula III-b include compounds represented by the following formula III-bm.

(In Formula III-m or Formula III-bm, R ⁴ , R ⁵ and R ^b4 each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and a group consisting of R ⁴ , R ⁵ and L ^3. At least two selected from the above may be linked together to form a ring, R ^b4 and L ^b3 may be linked together to form a ring, L ² represents a trivalent linking group, L ³ represents an alkylene group having 1 to 20 carbon atoms, and L ^b3 independently represents an alkylene group having 1 to 20 carbon atoms.)

R ^4, R ^5, L ² and L ³ in formula III-m are respectively synonymous with R ^4, R ^5, L ² and L ³ in the formula III, preferred embodiments are also the same.
R ^b4 and L ^b3 in formula III-bm is respectively R ^b4 and L ^b3 synonymous in formula III-b, preferred embodiments are also the same.

Moreover, as a polycondensate of a diisocyanate compound and a diol compound, from the viewpoint of the strength and water resistance of the obtained artificial nail, a monomer unit having the amino group and a monomer unit other than the monomer unit having the amino group are used. A polymer having at least one is preferable.
As the monomer other than the monomer unit having an amino group, a compound having two hydroxyl groups is preferable, and a water-insoluble compound having two hydroxyl groups is more preferable.
That is, the polycondensate of a diisocyanate compound and a diol compound preferably has a monomer unit derived from a compound selected from the group consisting of compounds having two hydroxyl groups in addition to the monomer unit having an amino group. More preferably, it has a monomer unit derived from a water-insoluble compound.
In the production of a polycondensate of a diisocyanate compound and a diol compound, examples of the monomer copolymerizable with a monomer having an amino group include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, 1,3- Propanediol, 1,2-propanediol, 2-methyl-1,3-propanediol, neopentyl glycol, 2-ethyl-2-methyl-1,3-propanediol, 2,2-diethyl-1,3- Propanediol, 2-methyl-2-propyl-1,3-propanediol, 2-butyl-2-ethyl-1,3-propanediol, 1,4-butanediol, 1,3-butanediol, 1,2 -Butanediol, 2,3-butanediol, 1,5-penta Diol, 1,6-hexanediol, 1,9-nonanediol, 1,3-cyclopentanediol, 1,2-cyclohexanediol, 1,3-cyclohexanediol, 1,4-cyclohexanediol, 4,4'- Isopropylidenedicyclohexanol, 1,4-cyclohexanedimethanol, 1,5-decalindiol, 4,8-bis (hydroxymethyl) tricyclo [5.2.1.0 (2,6)] decane, 2,2 , 3,3,4,4-hexafluoro-1,5-pentanediol, dipropylene glycol, polypropylene glycol, polytetramethylene glycol, 2,2′-thiodiethanol, 2-hydroxyethyl glycolate, N, N ′ -Bis (2-hydroxyethyl) succinamide, 2,2'-sulfonyldiethanol Bisphenol A, bisphenol S, bisphenol F, poly (ethylene glycol terephthalate), poly (ethylene glycol carbonate), poly (tetramethylene glycol carbonate) and the like. However, it is not limited to these examples.

As the diisocyanate compound used in the production of a polycondensate of a diisocyanate compound and a diol compound, a known diisocyanate compound can be used. Specifically, isophorone diisocyanate, m-phenylene diisocyanate, p-phenylene diisocyanate, 2,6-tolylene diisocyanate, 2,4-tolylene diisocyanate, naphthalene-1,5-diisocyanate, diphenylmethane-4,4′-diisocyanate Diphenylmethane-2,4′-diisocyanate, 2,2-bis (4-isocyanatophenyl) propane, bis (3-methyl-4-isocyanatophenyl) methane, 1,3-bis (1-isocyanato-1- Methylethyl) benzene, 4,4′-diisocyanatobiphenyl, 4,4′-oxybis (phenylisocyanate), 4,4′-diisocyanato-3,3′-dimethylbiphenyl, 4,4′-diisocyanato-3, 3'-dichlorobiphenyl, 4,4 -Diisocyanato-3,3'-dimethoxybiphenyl, m-xylylene diisocyanate, p-xylylene diisocyanate, 1-chloromethyl-2,4-diisocyanatobenzene, 2-methylxylylene-1,3-diisocyanate, 2 , 2-bis (4-isocyanatophenyl) hexafluoropropane, tetramethylene diisocyanate, hexamethylene diisocyanate, propylene-1,2-diisocyanate, butylene-1,2-diisocyanate, cyclohexylene-1,2-diisocyanate, cyclohexylene -1,3-diisocyanate, cyclohexylene-1,4-diisocyanate, dicyclohexylmethane-4,4′-diisocyanate, 1,4-bis (isocyanatomethyl) cyclohexane, 1,3-bis (i Cyanatomethyl) cyclohexane, norbornene diisocyanate, trimethylhexamethylene disissocyanate, lysine diisocyanate, 2-chloro-1,4-diisocyanatobenzene, 2,4,6-trimethylphenyl-1,3-diisocyanate, 2,2 ', 5,5′-tetrachlorodiphenyl-4,4′-diisocyanate, and the like. However, it is not limited to these examples.

Although the specific example of the polycondensate of a diisocyanate compound and a diol compound is shown below, it is not limited to this specific example.
As a polycondensate of a diisocyanate compound and a diol compound, a polymer having the following structure is preferable, and a polymer having the following structure and a weight average molecular weight is more preferable. Moreover, the number on the lower right of the parenthesis of each monomer unit represents a molar ratio. The number on the lower right of the parentheses in the alkyleneoxy chain represents the number of repetitions. Moreover, the structural unit described with * shows that the main chain terminal of this polymer has the said structure couple | bonded with the main chain by *.

The component a may be a polymer composed only of a monomer unit having an amino group as a monomer unit, but when the component a has a monomer unit having an amino group and another monomer unit, the monomer unit having an amino group The content is preferably from 5 to 75 mol%, more preferably from 20 to 75 mol%, still more preferably from 20 to 60 mol%, based on all monomer units of component a. It is excellent in the removability and water resistance of the obtained artificial nail as it is the said range.

The amine value of component a is preferably 0.1 to 10 mmol / g, more preferably 0.25 to 9 mmol / g, and still more preferably 0.5 to 8 mmol / g. It is excellent in the adhesiveness with the nail | claw of the obtained artificial nail and removability as it is the said range.
As a method for measuring the amine value, for example, a sample is weighed into a beaker, acetic acid is added, dissolved by stirring, the measurement temperature is adjusted to 25 ° C., and a 0.1N perchloric acid acetic acid solution is used as a titration reagent. Then, it can be obtained by titrating with a titration apparatus.
The amine value represents the amount of perchloric acid consumed when titrated in terms of moles per gram of sample (solid content).

The component a may be contained individually by 1 type, or may use 2 or more types together.
The content of component a in the artificial nail composition is not particularly limited, but is preferably 1 to 95% by mass and more preferably 5 to 95% by mass with respect to the total mass of the artificial nail composition. . It is excellent in the removability and adhesiveness of the obtained artificial nail as it is the said range. When the content of the solvent in the artificial nail composition is less than 10% by mass, that is, in the case of the above (ii), the content of component a is 10 to 90 with respect to the total mass of the artificial nail composition. More preferably, it is 20% by mass, particularly preferably 20 to 80% by mass, and particularly preferably 30 to 70% by mass. It is excellent in sclerosis | hardenability and adhesiveness as it is in the said range.
Further, when the content of the solvent in the artificial nail composition is 10% by mass or more, that is, in the case of the above (i), the content of the component a is 30 with respect to the total mass of the artificial nail composition. It is more preferably from 80 to 80% by mass, particularly preferably from 40 to 75% by mass.

In the embodiment (i) or (ii), the artificial nail composition may contain a polymer other than the component a for the purpose of improving the film property and gloss.
The polymer other than component a is preferably an acrylic polymer or a urethane polymer from the viewpoint of film properties. Moreover, you may contain the well-known polymer known as a viscosity modifier (thickener etc.) for the purpose of improving applicability | paintability.
In the aspect of (i) or (ii), when the artificial nail composition contains a polymer other than the component a, the content of the polymer other than the component a is preferably less than the content of the component a. The content is more preferably 40% by mass or less, more preferably 30% by mass or less, and still more preferably 20% by mass or less with respect to the total mass of the composition.

<Polymerizable compound>
In the above aspect (ii), the artificial nail composition preferably contains a polymerizable compound. By containing a polymerizable compound, the artificial nail composition can be suitably used as a photocurable artificial nail composition. Moreover, when containing a polymeric compound, it is preferable to further contain the photoinitiator mentioned later. By containing a polymerizable compound and a photopolymerization initiator, it can be more suitably used as a photocurable artificial nail composition.

The polymerizable compound may be a radical polymerizable compound or a cationic polymerizable compound, but is preferably a radical polymerizable compound.
The radical polymerizable compound is a compound having an ethylenically unsaturated bond capable of radical polymerization, and may be any compound as long as it has at least one ethylenically unsaturated bond capable of radical polymerization in the molecule. And those having a chemical form such as an oligomer. Only one kind of radically polymerizable compound may be used, or two or more kinds thereof may be used in combination at an arbitrary ratio in order to improve desired properties. The polymerizable compound is a compound other than component a, preferably a compound having a molecular weight of less than 10,000, more preferably a compound having a molecular weight of less than 5,000, and less than 2,000. Further preferred.

Examples of the polymerizable compound having an ethylenically unsaturated bond capable of radical polymerization include unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, isocrotonic acid, maleic acid, and salts thereof, Examples thereof include radical polymerizable compounds such as anhydrides having a saturated group, acrylonitrile, styrene, and various unsaturated polyesters, unsaturated polyethers, unsaturated polyamides, unsaturated urethane oligomers, and the like.
Specifically, 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, butoxyethyl (meth) acrylate, carbitol (meth) acrylate, cyclohexyl (meth) acrylate, benzyl (meth) acrylate, methyl ( (Meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, allyl (meth) acrylate, glycidyl (meth) acrylate, N-methylol (meth) Allylation of (meth) acrylic acid derivatives such as acrylamide, diacetone (meth) acrylamide, and epoxy (meth) acrylate, as well as allyl glycidyl ether, diallyl phthalate, triallyl trimellitate, etc. More specifically, Shinzo Yamashita, “Crosslinker Handbook”, (1981 Taiseisha); Kato Kiyomi, “UV / EB Curing Handbook (Raw Materials)” (1985, Polymer Publications); Radtech Study Group, “Application and Market of UV / EB Curing Technology”, 79 pages (1989, CMC); Eiichiro Takiyama, “Polyester Resin Handbook”, (1988, Nikkan Kogyo) Commercially available products as described in Newspaper Co.), or radically polymerizable or crosslinkable monomers and oligomers known in the industry can be used.
Moreover, as a polymerizable compound, the monomer used for the synthesis | combination of the said component a can also be used suitably.

The polymerizable compound contains an ethylenically unsaturated compound having a hydroxy group or an ethylenically unsaturated compound having a (poly) alkyleneoxy group from the viewpoint of the removability, adhesion and gloss of the resulting artificial nail. It is more preferable to include a (meth) acrylate compound having a hydroxy group or a (meth) acrylate compound having a (poly) alkyleneoxy group, and more preferable to include a (meth) acrylate compound having a hydroxy group. It is particularly preferable to include a monofunctional (meth) acrylate compound having a hydroxy group.

Examples of the (meth) acrylate compound having a hydroxy group include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, and 2,3-dihydroxypropyl (meth). Acrylate, hydroxyalkyl (meth) acrylate such as 4-hydroxybutyl (meth) acrylate, polyethylene glycol mono (meth) acrylate, polypropylene glycol mono (meth) acrylate, poly (ethylene glycol / propylene glycol) -mono (meth) acrylate, Polyethylene glycol / polypropylene glycol / mono (meth) acrylate, poly (ethylene glycol / tetramethylene glycol) / mono (meth) acrylate, poly ( B propylene glycol tetramethylene glycol) - mono (meth) acrylate, propylene glycol polybutylene glycol - it may be mentioned preferably a mono (meth) acrylate.

Examples of the (meth) acrylate compound having a (poly) alkyleneoxy group include methoxypolyethylene glycol- (meth) acrylate, octoxypolyethyleneglycol-polypropyleneglycol- (meth) acrylate, lauroxypolyethyleneglycol- (meth) acrylate, Stearoxy polyethylene glycol- (meth) acrylate, phenoxy polyethylene glycol- (meth) acrylate, phenoxy polyethylene glycol-polypropylene glycol- (meth) acrylate, nonylphenoxy-polyethylene glycol- (meth) acrylate, nonylphenoxy-polypropylene glycol- (meth) ) Acrylate, Nonylphenoxy-Poly (ethylene glycol-propylene glycol)- Meth) acrylate can be a preferably exemplified.

Commercially available products can be used as the (meth) acrylate compound having a hydroxy group and the (meth) acrylate compound having a (poly) alkyleneoxy group. Representative examples are Blemmer E, Blemmer PE-90, Blemmer PE-200, Blemmer PE-350, Blemmer P, Blemmer PP-1000, Blemmer PP-500, Blemmer PP-800, Blemmer 50 PEP-300, Blemmer 70 PEP- 350B, Blemmer 55PET-800, Blemmer PPT series, Blemmer 10PPB-500B, Blemmer AE-90, Blemmer AE-200, Blemmer AE-400, Blemmer AP-150, Blemmer AP-400, Blemmer AP-550, Blemmer PME-100 , Blemmer PME-200, Blemmer PME-400, Blemmer PME-1000, Blemmer 50POEP-800B, Blemmer PLE-200, Blemmer PSE-4 0, Blemmer PSE-1300, Blemmer PAE-50, Blemmer PAE-100, Blemmer 43PAPE-600B, Blemmer AME-400, Blemmer ALE series, Blemmer ANP-300, Blemmer 75ANP-600, Blemmer AAE-50, Blemmer AAE-300 (Above, manufactured by NOF Corporation).

When an ethylenically unsaturated compound having a hydroxy group is used, the number of hydroxy groups in the compound is preferably 1 to 10, more preferably 1 to 5, still more preferably 1 to 3, and particularly preferably 1. preferable.
When an ethylenically unsaturated compound having a (poly) alkyleneoxy group is used, the number of repeating units of the alkyleneoxy group in the compound is preferably 1 to 25, more preferably 1 to 15, and more preferably 1 to 10 Further preferred.

Among these, the polymerizable compound preferably includes a hydroxyalkyl (meth) acrylate compound, and includes 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and 3-hydroxypropyl (meth) acrylate. More preferably, 2-hydroxyethyl (meth) acrylate is further included.

The polymerizable compound preferably includes an ethylenically unsaturated compound having an alkyl group having 3 or more carbon atoms from the viewpoint of water resistance of the obtained artificial nail, and is ethylenic having an alkyl group having 5 or more carbon atoms. It is more preferable to include an unsaturated compound, and it is further preferable to include an ethylenically unsaturated compound having an alkyl group having 8 or more carbon atoms. These alkyl groups may have a branched and / or ring structure.

Examples of the ethylenically unsaturated compound having an alkyl group include propyl (meth) acrylate, butyl (meth) acrylate, hexyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl methacrylate, Examples thereof include, but are not limited to, isodecyl (meth) acrylate, tridecyl (meth) acrylate, stearyl (meth) acrylate, and isomers thereof.

The polymerizable compound preferably includes a (meth) acrylamide compound from the viewpoint of solubility of components other than the polymerizable compound. Examples of the (meth) acrylamide compound include N-hydroxyethyl (meth) acrylamide, N-butoxymethyl (meth) acrylamide, Nt-butyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N , N-diethyl (meth) acrylamide, N-dodecyl (meth) acrylamide, N-hydroxymethyl (meth) acrylamide, N-isopropyl (meth) acrylamide, N-phenyl (meth) acrylamide, N-isobutoxymethyl (meth) Examples thereof include, but are not limited to, acrylamide and N-methoxymethylacrylamide.

From the viewpoint of heat resistance of the resulting artificial nail composition, the polymerizable compound preferably includes an ethylenically unsaturated compound having a Tg (glass transition temperature) of a homopolymer of 50 ° C. or higher, and a Tg of 80 ° C. or higher. It is more preferable to include an ethylenically unsaturated compound, and it is further preferable to include an ethylenically unsaturated compound having a Tg of 100 ° C. or higher.

Examples of the ethylenically unsaturated compound having a Tg of 50 ° C. or higher as the homopolymer include methyl (meth) acrylate, t-butyl (meth) acrylate, benzyl methacrylate, isobornyl (meth) acrylate, adamantyl (meth) acrylate, and the like. However, it is not limited to these.

In addition, the polymerizable compound preferably includes a polymerizable compound having a urethane bond, more preferably includes a polyfunctional polymerizable compound having a urethane bond, from the viewpoint of the removability and film property of the resulting artificial nail. More preferably, it contains a polyfunctional (meth) acrylate compound having a urethane bond.
The polymerizable compound preferably includes a polyfunctional polymerizable compound having a molecular weight (weight average molecular weight) of 1,000 or more, and includes a polyfunctional polymerizable compound having a molecular weight (weight average molecular weight) of 3,000 or more. Is more preferable. By including a polyfunctional polymerizable compound having a molecular weight of 1,000 or more, the crosslink density is controlled to prevent the film from becoming brittle, and the durability of the artificial nail to be formed is improved.

Preferred examples of the polyfunctional (meth) acrylate compound having a urethane bond include urethane-based addition polymerizable compounds produced by an addition reaction between an isocyanato group and a hydroxyl group. Specific examples thereof include, for example, Two or more polymerizations in one molecule in which a vinyl monomer containing a hydroxyl group represented by the following formula A is added to an isocyanate compound having two or more isocyanate groups in one molecule described in Japanese Patent No. 48-41708. And vinyl urethane compounds containing a functional vinyl group.
_{^{CH 2 = C (R 7)}} COOCH 2 CH (R 8) OH (A)
(However, R ⁷ and R ⁸ each independently represents a hydrogen atom or a methyl group.)
Among these, preferable examples of the isocyanate compound include hexamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, 2,4,4-trimethylhexamethylene diisocyanate, and 2,4-dimethyl diisocyanate. -Trimethylhexamethylene diisocyanate, 2,4,4-trimethylhexamethylene diisocyanate and 2,4-dimethyldiisocyanate are more preferred, and 2,4-dimethyldiisocyanate is more preferred.
As the isocyanate compound, a polyester diisocyanate, a polyether diisocyanate, or a polycarbonate diisocyanate can be suitably used for the purpose of controlling the molecular weight. These diisocyanate compounds can be obtained by allowing polyether diol, polyester diol, and polycarbonate diol to react with the diisocyanate compounds described above and others, isophorone diisocyanate, and methylene diphenyl diisocyanate. At this time, from the viewpoint of the coating properties and water resistance of the artificial nail, a urethane addition polymerizable compound (more preferably a diol compound and / or a diisocyanate compound) having a polyester structure or a polycarbonate structure can be preferably used.

A polymeric compound may be contained individually by 1 type, or may use 2 or more types together.
The content of the polymerizable compound in the artificial nail composition is not particularly limited, but is preferably 1 to 95% by mass and more preferably 10 to 90% by mass with respect to the total mass of the artificial nail composition. The content is more preferably 20 to 80% by mass, and particularly preferably 30 to 70% by mass. It is excellent in the adhesiveness and removability of the obtained artificial nail as it is the said range.

<Photopolymerization initiator>
In the case of the above (ii), the artificial nail composition preferably contains a photopolymerization initiator. By containing a photopolymerization initiator, the artificial nail composition can be suitably used as a photocurable artificial nail composition.
Examples of the photopolymerization initiator include a radical photopolymerization initiator and a cationic photopolymerization initiator, but it is more preferable to contain a radical photopolymerization initiator.
A known photopolymerization initiator can be used as the photopolymerization initiator. The photoinitiator which can be used for this invention may be used individually by 1 type, and may use 2 or more types together. Moreover, you may use together a radical photoinitiator and a cationic photoinitiator.
The photopolymerization initiator that can be used in the present invention is a compound that absorbs light and generates a polymerization initiating species. Examples of light include γ rays, β rays, electron beams, ultraviolet rays, visible rays, and infrared rays, and preferably ultraviolet rays and visible rays.

Specific examples of the photopolymerization initiator that can be used in the present invention are as follows. However, it is not limited to these examples.
Acetophenone compounds (for example, 1-hydroxycyclohexyl phenyl ketone, acetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxyacetophenone, 2-hydroxy-2-methylpropiophenone, 4′-isopropyl-2 -Hydroxy-2-methylpropiophenone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholino-1-propane, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -Butan-1-one, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, etc.);
Benzophenone compounds (eg, benzophenone, 4,4′-bis (dimethylamino) benzophenone, 3,3-dimethyl-4-methoxy-benzophenone, etc.);
Anthraquinone compounds (for example, anthraquinone, 2-methylanthraquinone, 2-ethylanthraquinone, tert-butylanthraquinone, etc.);
A thioxanthone compound (for example, 2-chlorothioxanthone, diethylthioxanthone, isopropylthioxanthone, diisopropylthioxanthone, etc.);
Trihaloalkyl compounds (eg, 2,4,6- (trichloromethyl) triazine, 2,4-trichloromethyl-6- (4-methoxyphenyl) triazine, tribromomethylphenylsulfone, etc.);
Lophine dimer compounds (eg, 2- (o-chlorophenyl) -4,5-diphenylimidazolyl dimer);
Acridine compounds (eg, 9-phenylacridine, 1,7-bis (9-acridinyl) heptane, 1,5-bis (9-acridinyl) pentane, 1,3-bis (9-acridinyl) pronopane);
Phosphine oxide compounds (for example, trimethylbenzoyldiphenylphosphine oxide, bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide);
Metallocene compounds (eg, biscyclopentadienyl-bis (difluoro-pyryl-phenyl) titanium, etc.);
Onium salts (eg, bis (4-tert-butylphenyl) iodonium tosylate, triphenylsulfonium tosylate, etc.);
Oxime ester compounds (for example, 1- (4-phenylthiophenyl) -1,2-octanedione-2- (O-benzoyloxime), 1- [9-ethyl-6- (2-methylbenzoyl) -9H- Carbazol-3-yl] -ethanone-1- (O-acetyloxime) and the like.

Among them, the photopolymerization initiator is preferably a photopolymerization initiator selected from the group consisting of an acetophenone compound, a phosphine oxide compound, a metallocene compound, and a lophine dimer compound, and consists of an acetophenone compound and a phosphine oxide compound. Particularly preferred is a photopolymerization initiator selected from the group.
The content of the photopolymerization initiator in the artificial nail composition is preferably 0.1 to 20% by mass, and preferably 0.5 to 15% by mass with respect to the total mass of the artificial nail composition. Is more preferably 1 to 10% by mass. It is excellent in the adhesiveness and removability of the obtained artificial nail as it is the said range.

<Solvent>
In the case of the above-mentioned (ii), the artificial nail composition may contain a solvent from the viewpoint of applicability, but from the viewpoint of safety and handleability, the content of the solvent is the artificial nail composition. Is preferably less than 10% by mass, more preferably less than 5% by mass, and particularly preferably the artificial nail composition does not contain a solvent.
As the solvent, any known solvent can be suitably used. For example, alcohol solvents such as ethanol, isopropanol, ethylene glycol monomethyl ether, ethylene glycol monobutyl ether, propylene glycol monomethyl ether, diethylene glycol monoethyl ether, dipropylene glycol monomethyl ether and their acetate solvents, ethyl acetate, butyl acetate, etc. Examples thereof include ester solvents, ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone, and ether solvents such as tetrahydrofuran and methyl t-butyl ether. However, it is not limited to these examples.

From the viewpoint of the drying rate, the boiling point of the solvent is preferably 30 to 130 ° C, more preferably 35 to 100 ° C, still more preferably 40 to 90 ° C, and more preferably 50 to 85 ° C. Is particularly preferred. It is excellent in drying property and applicability | paintability as it is the said range.

The solvent may be contained individually by 1 type, or may use 2 or more types together.
The solvent preferably includes an alcohol solvent and / or a ketone solvent, and more preferably includes an alcohol solvent and a ketone solvent.
In the case of the embodiment (i), the artificial nail composition preferably contains a solvent. From the viewpoints of applicability, removal of the obtained artificial nail and adhesion, the content of the solvent is artificial. It is preferably 1 to 90% by mass, more preferably 5 to 80% by mass, still more preferably 10 to 80% by mass, and more preferably 15 to 50% by mass with respect to the total mass of the nail composition. It is particularly preferred.

<Other ingredients>
In the artificial nail composition, as other components other than the above components, additive components that can be generally blended in the artificial nail composition can be arbitrarily blended within a range not impairing the effects of the present invention. Examples of such additive components include antifoaming agents, buffering agents, chelating agents, dispersing agents, dyes, fillers, pigments, preservatives, resin powders (for example, poly (meth) acrylic acid), inorganic powders, and the like. (For example, silica gel, etc.), thickeners, wetting agents and the like. However, it is not limited to these examples.
In addition, although these arbitrary components may be previously blended in the artificial nail composition, a necessary amount of the necessary components may be blended in the artificial nail composition each time during the cosmetic treatment.

Further, the compounding amount of each component in the artificial nail composition is not particularly limited, but by mass ratio, component a / polymerizable compound / polymerization initiator / solvent / other components = 10 to 90/5 to A range of 85 / 0.5 to 12/0 to 50/0 to 40 is preferable. It is excellent in applicability | paintability as it is the said range, and excellent in the removability and glossiness of the artificial nail | claw obtained.

-Aspect of (iii)-
Component b: Monomer having an amino group In the present invention, in the case of the embodiment (iii), the artificial nail composition contains a monomer having an amino group as the component b. As the monomer having an amino group, any compound having an ethylenically unsaturated group and an amino group can be used without particular limitation.
The ethylenically unsaturated group is preferably a group represented by CH ₂ ═C (R) —. Here, R represents a hydrogen atom or a lower alkyl group (C1-4). R is preferably a hydrogen atom or a methyl group.
The ethylenically unsaturated group is preferably a (meth) acryloyl group or a (meth) acrylamide group.

The amino group which component b has may be any of a primary amino group, a secondary amino group and a tertiary amino group.
The primary amino group is a group represented by —NH ₂ , and the secondary amino group is a group represented by —NH—. Note that —CONH _{2 at the} molecular end is included in the primary amino group. However, the primary amino group is preferably adjacent to the methylene carbon atom. At least one primary amino group, secondary amino group, and tertiary amino group may be included in the molecule, but two or more may be included.
In component b, the ethylenically unsaturated group in the molecule preferably has addition polymerizability, and preferably has radical polymerizability. This compound may be a low molecule or an oligomer.
Examples of the ethylenically unsaturated compound having an amino group include compounds described in JP-A-2009-126833, and examples of the compound having a tertiary amino group include 2-dimethylaminoethyl (meth) Examples include acrylate, 2-dimethylaminomethyl (meth) acrylamide, 3-dimethylaminopropyl (meth) acrylate, 3-dimethylaminopropyl (meth) acrylamide and the like.

Component b preferably has a primary amino group and / or a secondary amino group from the viewpoint of adhesion to the nail, and component b having a primary amino group and / or a secondary amino group includes Preferably, it is a compound represented by the formula I and / or a compound represented by the formula II shown below.

Wherein R ¹ represents a hydrogen atom, an alkyl group, a cycloalkyl group, or an aryl group, R ² represents a hydrogen atom or a methyl group, p represents an integer of 0 to 50, and X represents an alkylene group , -COO-, -CONH-, and -C ₆ H _4- represent a linking group selected from the group consisting of: Y represents a divalent linking group, and a plurality of Y may be the same or different from each other. Well, X and R ¹ may combine to form a ring.)

(Wherein R ² represents a hydrogen atom or a methyl group, p represents an integer of 0 to 50, X represents an alkylene group, —COO—, —CONH—, and —C ₆ H ₄ —. Represents a selected linking group, Y represents a divalent linking group, and a plurality of Y may be the same or different.

First, the compound represented by Formula I will be described.
R ¹ represents a hydrogen atom or an alkyl group, a cycloalkyl group, or an aryl group. The alkyl group that R ¹ can adopt preferably has 1 to 6 carbon atoms, and examples thereof include a methyl group, an ethyl group, an isopropyl group, a t-butyl group, and an n-hexyl group. The cycloalkyl group that R ¹ can take has preferably 3 to 6 carbon atoms, and more preferably a cyclopentyl group or a cyclohexyl group.
The aryl group preferably has 6 to 12 carbon atoms, and more preferably a phenyl group.

When Y and R ¹ are bonded to form a ring, the ring is preferably a piperidine ring or a pyrrolidine ring.

R ¹ may have a substituent, if allowed, and the type thereof is not particularly limited, but is preferably a group inert to radical polymerization, more preferably a hydroxyl group. preferable.
R ¹ is preferably a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, more preferably a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and a hydrogen atom, a methyl group, an ethyl group or hydroxyethyl Particularly preferred is a group.

R ² represents a hydrogen atom or a methyl group.
p is a repeat number and represents an integer of 0 to 50, preferably an integer of 0 to 30, more preferably an integer of 0 to 20, and further preferably an integer of 0 to 10.
X is a linking group selected from the group consisting of an alkylene group, —COO—, —CONH—, and —C ₆ H ₄ —. The alkylene group preferably has 1 to 4 carbon atoms, more preferably a methylene group or ethylene group, and particularly preferably a methylene group. X is preferably an alkylene group, —COO— or —CONH—, and particularly preferably —CONH—.

Y is a divalent linking group, and when p is 2 or more, a plurality of Y may be the same or different from each other. Y and R ¹ may be bonded to form a ring. Y preferably represents an alkylene group, an alkyleneoxy group, an alkyleneamino group, a carbonyl group, or a group obtained by combining these.
The alkylene group preferably has 1 to 10 carbon atoms, more preferably an ethylene group or a propylene group. As the alkyleneoxy group, an ethyleneoxy group is preferable. Among these, Y is particularly preferably an ethylene group or a propylene group, an ethyleneoxy group, a propyleneoxy group, or a butyleneamide group.
In addition, it is preferable that said carbonyl group couple | bonds with carbon of an ethylenically unsaturated group, and forms a terminal amide group.

Next, Formula II will be described.
R ² , X, Y, and p are the same as defined in Formula I, and preferred ranges are also the same.

Formula I is a monofunctional compound having only one radical polymerizable ethylenically unsaturated group, and Formula II is a bifunctional compound having two radical polymerizable ethylenically unsaturated groups. In the present invention, it is preferable to use the compound of formula I or formula II alone or to use a monofunctional compound represented by formula I and a bifunctional compound represented by formula II in combination. When the use ratio of the monofunctional compound is high, the removal property of the cured film is excellent. On the other hand, when the use ratio of the bifunctional compound is high, the curability is excellent. Therefore, both compounds represented by the formulas I and II are mixed at an appropriate ratio. It is preferable to mix and adjust curability, adhesion, and removability as appropriate.
In addition, it is excellent in the adhesiveness and removability of the cured film obtained, so that the amine value of the compound represented by Formula I and Formula II is high.

In the case of the embodiment (iii), the amine value of the non-volatile component of the artificial nail composition according to the present invention is preferably 0.4 to 8.5 mmol / g, and 1.3 to 8.5 mmol / g. More preferably, it is 1.3 to 6.0 mmol / g. It is excellent in the removability and water resistance of the obtained artificial nail as it is the said range. Here, the “nonvolatile component” means a component other than that when a volatile solvent is included.
As a method for measuring the amine value, for example, a sample is weighed into a beaker, acetic acid is added, dissolved by stirring, the measurement temperature is adjusted to 25 ° C., and a 0.1N perchloric acid acetic acid solution is used as a titration reagent. Then, it can be obtained by titrating with a titration apparatus.
The amine value represents the amount of perchloric acid consumed when titrated in terms of moles per gram of sample (nonvolatile component).

Component b can be obtained as a commercial product, or can be synthesized by a method known to those skilled in the art.

Specific examples of component b are shown below, but are not limited to these specific examples.

The blending amount of component b in the artificial nail composition is preferably 5 to 80% by mass and more preferably 10 to 60% by mass with respect to the non-volatile component of the composition.

<Polymerization initiator>
In the present invention, in the embodiment (iii), the artificial nail composition preferably contains a photopolymerization initiator. As a photoinitiator, the photoinitiator described in the aspect of said (ii) is illustrated, and a preferable aspect is the same.

<Polymer component>
In the present invention, in the case of the above (iii), the artificial nail composition preferably contains a polymer component as a film forming agent.
The weight average molecular weight of the polymer component is preferably from 2,000 to 300,000, more preferably from 3,000 to 200,000, still more preferably from 4,000 to 100,000. It is especially preferable that it is 50,000 or more and 50,000 or less. It is excellent in the adhesiveness of the hardened | cured material obtained, and removability, and temporal stability as it is the said range.
There is no restriction | limiting in particular about the structure of a polymer component, What is necessary is just an arbitrary structure. Examples thereof include a chain structure, a branched (branched) structure, a star structure, a crosslinked structure, and a network structure.
Here, the film-forming agent means a material that forms a self-supporting film alone when it is formed on a base, preferably a polymer component having a weight average molecular weight of 5,000 or more. is there.

The type of polymer component is not particularly limited, and is an acrylic polymer, urethane polymer, cellulose polymer, ester polymer, amide polymer, vinyl polymer, ether polymer, styrene polymer, carbonate polymer, urea polymer. , Known polymers such as ethylene-based polymers are used.
From the viewpoint of film formability and handleability (viscosity), ether polymers, ethylene polymers (especially polyethyleneimine polymers), urethane polymers and acrylic polymers are preferred, urethane polymers and acrylic polymers are particularly preferred, and urethanes A polymer is most preferable.

Examples of the acrylic polymer include known acrylic acid derivatives (for example, acrylic esters such as methyl acrylate and ethyl acrylate, acrylic amides such as acrylamide and acryloylmorpholine), and methacrylic acid derivatives (for example, methyl methacrylate, methacrylic acid). Any polymer can be suitably used as long as it is a polymer obtained by polymerizing a methacrylic acid ester such as ethyl or a methacrylic acid amide such as methacrylamide or isopropylamide. In the present invention, in particular, an acrylic polymer containing an addition polymerizable curable group (for example, (meth) acryl group or the like) in the side chain is preferably used. However, it is not limited to these examples.

Examples of the urethane polymer include known polyisocyanate compounds (for example, tolylene diisocyanate, isophorone diisocyanate) and known polyol compounds (for example, alkylene diols such as butanediol and hexanediol, arylenediols such as p-hydroxystyrene, polyethylene) Any polyurethane can be used as long as it is made of a polyether diol such as glycol or polypropylene glycol, a polyester diol such as polyethylene glycol terephthalate, or a polycarbonate diol such as polyethylene glycol carbonate. However, it is not limited to these examples.

As the cellulose polymer, any known cellulose such as carboxymethylcellulose, nitrocellulose, triacetylcellulose, and the like can be preferably used. However, it is not limited to these examples.

As the ester polymer, any polyester comprising a known polycarboxylic acid compound (for example, succinic acid, adipic acid, phthalic acid, etc.) and a known polyol compound can be suitably used. In addition, polyesters composed of hydroxycarboxylic acid compounds such as polylactic acid can also be suitably used. However, it is not limited to these examples.

As the amide polymer, any polyamide can be suitably used as long as it is a polyamide comprising a known polycarboxylic acid compound and a known polyamine compound (for example, ethylenediamine, phenylenediamine, etc.). In addition, polyamino acids, which are proteins composed of amino acids, can also be preferably used. However, it is not limited to these examples.

As the vinyl polymer, any vinyl polymer obtained by polymerizing a known vinyl compound (for example, vinyl acetate, vinyl chloride, butadiene, etc.) can be suitably used. However, it is not limited to these examples.

As the ether polymer, any polyether (for example, polyethylene glycol, polypropylene glycol, etc.) made of a known polyol compound can be suitably used. However, it is not limited to these examples.

As the styrene-based polymer, any polystyrene can be suitably used as long as it is made of a known styrene compound (for example, styrene, 4-carboxystyrene, 4-acetoxystyrene, etc.). However, it is not limited to these examples.

As the carbonate-based polymer, any polycarbonate can be suitably used as long as it is a polycarbonate composed of a known carbonic acid derivative (for example, phosgene, dimethyl carbonate, dimethyl carbonate, etc.) and a known polyol compound. However, it is not limited to these examples.

As the urea polymer, any polyurea composed of a known polyisocyanate compound and a known polyamine compound can be suitably used. However, it is not limited to these examples.

The content of the polymer component is preferably 0 to 80% by mass and more preferably 20 to 60% by mass with respect to the total mass of the nonvolatile components of the artificial nail composition.

<Polymerizable compound having no amino group>
In the case of the above embodiment (iii), a polymerizable compound having no amino group may be contained in addition to the component b. Examples of the polymerizable compound having no amino group include compounds having no amino group among the polymerizable compounds described as the polymerizable compound in the embodiment in (ii), and the preferred embodiments are also the same.

<Other ingredients>
In the case of the embodiment (iii), a solvent may be contained in addition to the above components. Examples of the solvent include the solvents described in the above embodiment (ii), and preferred embodiments are also the same.
Moreover, generally the additive component which can be mix | blended in the artificial nail composition can be arbitrarily mix | blended within the range which does not impair the effect of this invention. Examples of such additive components include antifoaming agents, buffering agents, chelating agents, dispersing agents, dyes, fillers, pigments, preservatives, resin powders (for example, poly (meth) acrylic acid), inorganic powders, and the like. (For example, silica gel, etc.), thickeners, wetting agents and the like. However, it is not limited to these examples.
In addition, although these arbitrary components may be previously blended in the artificial nail composition, a necessary amount of the necessary components may be blended in the artificial nail composition each time during the cosmetic treatment.

In the case of the above (iii), the amount of each component in the artificial nail composition is not particularly limited, but the mass ratio of the non-volatile components in the artificial nail composition is component b / photopolymerization. Initiator / polymer component / polymerizable compound having no amino group = preferably in the range of 50 to 80 / 0.01 to 20/0 to 80/0 to 50. However, the total of component b to polymerizable compound having no amino group is 100 parts by mass. It is excellent in applicability | paintability as it is the said range, and excellent in the removability and glossiness of the artificial nail | claw obtained.

-Aspect of (iv)-
In the embodiment of the present invention (iv), the artificial nail is an acrylic polymer, urethane polymer (also referred to as urethane polymer or polyurethane), cellulose polymer, ester polymer, amide polymer, vinyl polymer. And at least one polymer selected from the group consisting of an ether polymer, a styrene polymer, a carbonate polymer, a urea polymer, and an ethylene polymer.
From the viewpoint of film formability and handleability (viscosity), ether polymers, ethylene polymers (especially polyethyleneimine polymers), urethane polymers and acrylic polymers are preferred, urethane polymers and acrylic polymers are particularly preferred, and adhesion From the viewpoint of properties, urethane polymers are most preferable.
For the acrylic polymer, cellulose polymer, ester polymer, amide polymer, vinyl polymer, ether polymer, styrene polymer, carbonate polymer, urea polymer and ethylene polymer, in the embodiment (iii) above, Various polymers described as the polymer component are exemplified, and preferred ranges are also the same.
In the case of the above (iv), the artificial nail composition may further contain a polymerization initiator and a polymerizable compound, and may be a photocurable artificial nail composition that is cured by exposure, and also contains a solvent and is dried. A so-called artificial nail composition for nail polish that forms an artificial nail may be used. Among these, a photocurable artificial nail composition is preferable.

<Urethane polymer>
The removal liquid of the present invention is suitable for removing an artificial nail containing a urethane polymer (polyurethane), and is suitably used for removing an artificial nail formed with an artificial nail composition containing a urethane polymer.
Examples of the polyurethane include known polyisocyanate compounds (for example, tolylene diisocyanate, isophorone diisocyanate, etc.) and known polyol compounds (for example, alkylene diols such as butanediol and hexanediol, arylenediols such as p-hydroxystyrene, polyethylene glycol, Any polyurethane can be used as long as it is made of a polyether diol such as polypropylene glycol, a polyester diol such as polyethylene glycol terephthalate, and a polycarbonate diol such as polyethylene glycol carbonate. However, it is not limited to these examples.
Although the specific example used suitably as a polyurethane is shown below, this invention is not limited to these. The number on the lower right of the parenthesis of each monomer unit represents the molar ratio.

In the aspect of (iv), when the artificial nail composition is a photocurable artificial nail composition, the polymerization initiator and the polymerizable compound described in the aspect of (ii) above may be used as the polymerization initiator and the polymerizable compound. It is preferably used and the preferred range is also the same.

In the present invention, among the above embodiments (i) to (iv), the embodiments (ii) to (iv) are preferable, the embodiment (ii) or (iii) is more preferable, and (ii) More preferably,

(Artificial nail formation method)
In the present invention, the method for forming an artificial nail is not particularly limited as long as it is a method for forming an artificial nail using an artificial nail composition, but the artificial nail composition may be applied to a human or animal nail or other It is preferable that the method includes a step of coating the artificial nail to form a coating film, and a step of drying and / or exposing the coating film to form an artificial nail.
In order to form the artificial nail composition as an artificial nail, either a dry or exposure forming method can be suitably selected.
The artificial nail composition preferably contains at least a polymer, a polymerizable compound, and a photopolymerization initiator, or contains at least a polymer and a solvent.
Further, the thickness of the layer formed by the artificial nail composition (the thickness of the artificial nail) is not particularly limited, but is preferably 10 to 2,000 μm, more preferably 20 to 1,500 μm. It is preferably 20 to 1,000 μm.

<Application process>
The method for forming an artificial nail preferably includes a step (application step) of applying an artificial nail composition on a human or animal nail or other artificial nail to form a coating film.
The other artificial nail is not particularly limited as long as it is a base material used for the artificial nail, and examples thereof include a resin base material.
There is no restriction | limiting in particular as a coating method, Although what is necessary is just to perform by a well-known method, The method of apply | coating using a brush, a brush, etc. is mentioned preferably. Further, spray coating or ink jet coating may be performed.
The thickness of the coating film is not particularly limited, and the coating thickness may be appropriately adjusted in consideration of the desired thickness of the obtained artificial nail.

<Drying or exposure process>
The method for forming an artificial nail preferably includes a step of drying and / or exposing the coating film to form an artificial nail (drying or exposure step).

-Drying process-
When the artificial nail is formed by drying, the artificial nail composition to be used preferably contains a solvent.
There is no restriction | limiting in particular as a drying method, What is necessary is just to carry out by a well-known method.
Specifically, for example, a method of leaving and drying at room temperature (for example, 10 to 30 ° C.), a method of leaving and drying in an air stream, a method of drying by heating, and a method combining these are preferable. The heating method is not particularly limited, and examples thereof include a method of leaving in an atmosphere at a temperature higher than room temperature, a method of leaving in a heated air current, and a method of heating by a heating means such as a heater or an infrared lamp (IR lamp). .
The drying time is not particularly limited and may be appropriately adjusted depending on the composition of the artificial nail composition, the drying method, and the coating thickness. From the viewpoint of simplicity and imparting smoothness and gloss by self-leveling, 10 seconds to It is preferably 20 minutes, more preferably 15 seconds to 10 minutes, further preferably 30 seconds to 5 minutes, and particularly preferably 30 seconds to 2 minutes.

-Exposure process-
When an artificial nail is formed by exposure, the artificial nail composition to be used preferably contains a polymerizable compound and a photopolymerization initiator.
Moreover, when the artificial nail composition contains a solvent in addition to the polymerizable compound and the photopolymerization initiator, drying is preferably performed before exposure.
Examples of light used for exposure include ultraviolet rays and visible rays, and ultraviolet rays are particularly preferable from the viewpoint of curing sensitivity and availability of the apparatus.
The exposure means is not particularly limited, and known exposure means can be used. For example, ultraviolet lamps (UV lamps) such as mercury lamps and metal halide lamps, light emitting diodes (LEDs), laser diodes (LDs), etc. Can be mentioned.
The exposure time is not particularly limited, but is preferably 2 seconds to 5 minutes, more preferably 5 seconds to 3 minutes, and further preferably 5 seconds to 2 minutes. In addition, the exposure may be performed intermittently, continuously, or with pulsed light, and may be performed by any method.

The method for forming the artificial nail is a method for cleaning or sculpting the surface of the obtained artificial nail after the drying or exposure step from the viewpoint of removing the uncured component when exposed to gloss and aesthetics. A step of wiping off may be included.
Examples of the washing or wiping method include a method of wiping with a wiping base material such as a wipe sheet or a sponge wipe containing a solvent such as ethanol, and a method of washing with a solvent such as ethanol or water.
The solvent used for cleaning or wiping is preferably a solvent that does not dissolve the obtained artificial nail.
In addition, the method for forming an artificial nail preferably includes a step of roughening the surface of a human or animal nail or other artificial nail before the coating step when performing exposure. It is excellent in the adhesiveness and durability of the artificial nail (gel nail) obtained by exposing as it is the said aspect.
There is no restriction | limiting in particular as a roughening method of the nail | claw surface, It can carry out by a well-known method. For example, a method of roughening with a nail file such as a file is preferred.
Moreover, the formation method of the artificial nail may include other known processes.

Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the embodiments in these examples. Unless otherwise specified, “part” and “%” are based on mass.

(Preparation of removal liquid)
Various components shown in Table 13 below were uniformly mixed to prepare a removal solution.

Details of each reagent used for the removal liquid are as follows.
Citric acid (manufactured by Tokyo Chemical Industry Co., Ltd.)
Trisodium citrate dihydrate (manufactured by Wako Pure Chemical Industries, Ltd.)
Methanol (manufactured by Tokyo Chemical Industry Co., Ltd.), hydroxyl value: 31.2 mmol / g
Ethanol (manufactured by Kanto Chemical Co., Inc.), hydroxyl value: 21.7 mmol / g
Isopropyl alcohol (manufactured by Kanto Chemical Co., Inc.), hydroxyl value: 16.6 mmol / g
PVA-105 (manufactured by Kuraray Co., Ltd.), hydroxyl value: 22.7 mmol / g
PEG Mw200 (manufactured by Tokyo Chemical Industry Co., Ltd.), hydroxyl value: 10.0 mmol / g
PEG Mw300 (manufactured by Tokyo Chemical Industry Co., Ltd.), hydroxyl value: 6.7 mmol / g
PEG Mw400 (manufactured by Tokyo Chemical Industry Co., Ltd.), hydroxyl value: 5.0 mmol / g
PEG Mw600 (manufactured by Tokyo Chemical Industry Co., Ltd.), hydroxyl value: 3.3 mmol / g
Catechol (manufactured by Tokyo Chemical Industry Co., Ltd.), hydroxyl value: 18.2 mmol / g
Propylene glycol (manufactured by Taiyo Nippon Sanso Co., Ltd.), hydroxyl value: 26.3 mmol / g
1,3-butanediol (manufactured by Tokyo Chemical Industry Co., Ltd.), hydroxyl value: 22.2 mmol / g
Maltitol (manufactured by Tokyo Chemical Industry Co., Ltd.), hydroxyl value: 26.1 mmol / g
Glycerol (manufactured by Tokyo Chemical Industry Co., Ltd.), hydroxyl value: 32.6 mmol / g

(Preparation of artificial nail composition)
Various components shown in Table 14 below were uniformly mixed to obtain an artificial nail composition.

The following products were used as J-8.
J-8: Commercial product, manufactured by Mogabrook, Calgel # CG-00 Clear Gel, polyurethane methacrylate included

Details of each reagent used in the artificial nail composition are as follows.

Polyurethane acrylate; manufactured by Nippon Synthetic Chemical Industry Co., Ltd., purple light UV-3300B, weight average molecular weight = 13,000, number of functional groups = 2
2-hydroxyethyl methacrylate (manufactured by Tokyo Chemical Industry Co., Ltd.)
2-hydroxypropyl methacrylate (manufactured by Tokyo Chemical Industry Co., Ltd.)
2-Dimethylaminoethyl methacrylate (manufactured by Kyoeisha Chemical Co., Ltd.)
Isobornyl methacrylate (manufactured by Tokyo Chemical Industry Co., Ltd.)
Diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide (manufactured by Wako Pure Chemical Industries, Ltd.)
1-hydroxycyclohexyl phenyl ketone (manufactured by Tokyo Chemical Industry Co., Ltd.)
T-Butyl acetate (manufactured by Hichem Corp.)

(Removability evaluation method-1)
An artificial nail composition (base gel) is used on a brush-treated aluminum so that the surface roughness of the artificial nail composition described in Table 14 is very similar to that of a general nail surface unevenness. Was applied. Then, the ultraviolet lamp (36W) was irradiated for 2 minutes. The artificial nail composition (base gel) was applied so that the film thickness after irradiation was about 100 μm (± 10 μm).
Thereafter, commercially available calgel # CG-03 fresh pink (manufactured by Mogabrook) was applied as a color layer with a brush, and then irradiated with an ultraviolet lamp (36 W) for 5 minutes. Furthermore, a commercially available top gel (manufactured by Mogabrook Co., Ltd.) was applied as a top layer with a brush, and similarly irradiated with an ultraviolet lamp (36 W) for 5 minutes. When the formed artificial nail was observed visually and with a finger touch, it was completely solidified.
The total film thickness of the color layer and the top layer was about 250 μm. Thereafter, the surface was wiped off with ethanol.
The surface and tip of the resulting artificial nail were scratched with a file (file for nails), then immersed in the removal solution described in Table 13 for 2 minutes, and pressed using a wooden stick while being immersed. The peeling treatment which peels was performed, and the time (removal time; time required for peeling treatment) until peeling was evaluated.

The surface roughness of the general nail is 13.9% as a result of measuring ΔS using an atomic force microscope (AFM), and an aluminum plywood (thickness is 0.3 μm) to match the value. , JIS 1050, JIS 1100, JIS 3003 and other aluminum alloys). The brush process was performed as follows.
Using three bundle-planted nylon brushes with a bristle diameter of 0.3 mm and a pumice-water suspension with a median diameter of 25 μm (specific gravity 1.1 g / cm ³ ), the surface of the aluminum alloy plate sample is grained and washed with water. Washed. This sample was immersed in a 25 mass% sodium hydroxide aqueous solution at 70 ° C. for 25 seconds for etching and washed with water. Next, the washed sample was immersed in a 20% nitric acid aqueous solution at 60 ° C. for 20 seconds and washed with water.
For the aluminum plywood, an aluminum alloy such as JIS1050, JIS1100, and JIS3003 having a thickness of 0.3 μm was used.

(Removability evaluation method-2)
Using a brush on a plastic base material molded into a nail shape, 0.25 g of the artificial nail composition (base gel) shown in Table 14 was applied and irradiated with an ultraviolet lamp (36 W) for 2 minutes. Thereafter, the surface was washed with ethanol. Then, the surface of the cured film was scratched with a file (file for nails) and immersed in the removal liquid shown in Table 13, and then each sample (cured film) taken out was peeled off using a wooden stick. The treatment was performed, and the time until removal (removal time; time required for the separation treatment) was evaluated.

(Examples 1-1 to 1-4 and Comparative Examples 1-1 to 1-4)
Using A-2 containing a compound having a hydroxyl group and A-1 not containing a compound having a hydroxyl group as the removing solution, the removability of artificial nails formed using various artificial nail compositions was evaluated. The results are shown in the table below.

From this result, it was revealed that the removability was improved by adding a compound containing a hydroxyl group (1,3-butanediol) to citric acid pH = 2.6. Moreover, it turned out that it can remove more rapidly especially by combining the artificial nail | claw using the artificial nail composition (base gel) which prescribed | regulated the urethane polymer which has an amino group, and the removal liquid of this invention.

(Examples 2-1 to 2-4)
The influence of the pH of the removal solution on the removability was evaluated. The results are shown in the table below.

From this result, it was found that when the pH is 5 or less, the removability is almost unchanged and can be removed quickly.

(Examples 3-1 to 3-13 and Comparative Example 3-1)
Various compounds having a hydroxyl group were added to the removal solution to evaluate the removability. The results are shown in the table below.

It was found that any removal solution obtained by adding various hydroxyl group-containing compounds to citric acid pH = 2.6 aqueous solution was excellent in removability.

(Example 4-1 and Comparative Examples 4-1 and 4-2)
The artificial nail was peeled off using various removal solutions. The results are shown in the table below.

From these results, it was found that the removal property was obviously improved by the removal liquid in which the three constituents shown on the left were mixed as compared with the single system of acid compound, hydroxyl group-containing compound and water.

(Example 5-1 and Comparative example 5-1)
Using the artificial nail composition described in Japanese Patent Application Laid-Open No. 2009-126833, a comparison test was performed between the removal liquid of the present invention and the removal liquid described in the prior art.

From this result, it was found that, in comparison with the prior art, the removability was improved by adding a compound having a hydroxyl group, similar to the above experimental result.

Claims

An acid compound as component A;
A compound having a hydroxyl group as component B, and
It contains water as component C,
Remover for artificial nails.
The removal solution for artificial nails according to claim 1, wherein the pH is 1 or more and 5 or less.
The removal liquid for artificial nails according to claim 1 or 2, containing at least one organic acid as component A.
The removal liquid for artificial nail according to any one of claims 1 to 3, wherein Component B contains a compound having a hydroxyl value of 5 mmol / g or more.
The artificial nail removal liquid according to any one of claims 1 to 4, wherein the artificial nail contains a urethane polymer.
The artificial nail removal solution according to any one of claims 1 to 5, wherein the artificial nail contains a polymer having an amino group.
The artificial nail removal solution according to any one of claims 1 to 6, wherein the artificial nail is an artificial nail formed of an artificial nail composition containing a polymer having an amino group.
The artificial nail removal solution according to any one of claims 1 to 7, wherein the artificial nail is an artificial nail formed of an artificial nail composition containing a monomer having an amino group.
The removal solution for artificial nails according to any one of claims 1 to 8, wherein the artificial nails are artificial nails formed by curing a photocurable artificial nail composition.
A method for removing an artificial nail, comprising a step of bringing the removal liquid according to any one of claims 1 to 9 into contact with the artificial nail.
An artificial nail composition;
A nail art kit comprising the artificial nail removal solution according to any one of claims 1 to 9.
The nail art kit according to claim 11, wherein the artificial nail composition contains a polymer having an amino group.
The nail art kit according to claim 11 or 12, wherein the artificial nail composition contains a monomer having an amino group.
The nail art kit according to any one of claims 11 to 13, wherein the artificial nail composition is a photocurable artificial nail composition.