JP5389496B2 - Topical skin preparation - Google Patents

Description

  The present invention relates to an external preparation for skin.

  In general, external preparations for moisturizing the skin are mixed with polyhydric alcohol as a moisturizing agent. And in order to prevent the transpiration of moisture from the skin, oily components such as liquid paraffin, higher alcohol, ester oil, etc., or film-like polymer compounds are added to enhance the moisturizing effect. Yes.

  For example, Patent Document 1 discloses an emulsified composition in which a specific anionic surfactant is blended with an oil component such as a polyhydric alcohol and liquid paraffin. Patent Document 2 discloses a cosmetic containing a water-soluble polysaccharide and a water-soluble polymer.

  Although these techniques can improve the moisturizing effect to some extent, they are not sufficiently satisfactory in terms of usability such as lack of sustainability and elongation or stickiness during application. Moreover, when a skin external preparation containing a film-forming polymer compound is used on the face, a feeling of occlusion may be felt as if the face is covered with the film.

  On the other hand, antiseptic components are blended in the external preparation for skin for antiseptic stability. As such an antiseptic component, parabens and benzoic acids are frequently used. However, when these general-purpose antiseptic ingredients are added to the external preparation for skin, there is a problem in that skin irritation is felt when used by humans with sensitive skin.

JP 2003-176221 A JP 2005-330257 A

  The present invention has been made in view of the above prior art, and the first problem is that the stretch is good at the time of use, there is no stickiness after application, the moisture feeling and its sustainability are excellent, and An object of the present invention is to provide an external preparation for skin that does not feel the blockage peculiar to a polymer compound even if it is used, and the skin becomes soft and soft.

  In addition to the first problem, the second problem is to provide an external preparation for skin that does not cause skin irritation even when used by a human with sensitive skin and has a sufficient antiseptic effect.

  That is, 1st invention is related with the skin external preparation characterized by including the polymer or copolymer of (alpha) -olefin oligomer, hydrogenated oil, and 2-methacryloyloxyethyl phosphorylcholine.

  And the 2nd invention relates to the skin external preparation characterized by containing 3-iodo-2-propynyl butyl carbamate as a preservative ingredient further to the 1st invention.

  The external preparation for skin of the first invention has good elongation at the time of use, has no stickiness after application, is excellent in moisturization and its sustainability, and does not feel the occlusion feeling peculiar to polymer compounds even when used on the face. It has the effect of softening and softening the skin.

  In addition to the effect of the external preparation for skin of the first invention, the external preparation for skin of the second invention does not cause skin irritation even when used by humans with sensitive skin, and exhibits a sufficient antiseptic effect.

  The first invention will be described. The skin external preparation of 1st invention contains the polymer or copolymer of (A) alpha-olefin oligomer, (B) hydrogenated oil, and (C) 2-methacryloyloxyethyl phosphorylcholine.

  The α-olefin oligomer of the component (A) is a hydrocarbon having a degree of polymerization of about 3 to 6 having a side chain obtained by polymerizing a linear aliphatic α-olefin having about 4 to 12 carbon atoms and then hydrogenating. It is. Such an α-olefin oligomer can be obtained as a commercial product and can be used as it is. Examples of commercially available products that can be used include trade name Nomucoat HP-30 (manufactured by Nisshin Oillio Group Co., Ltd.), trade name Synthelan 4SP (manufactured by Nikko Chemicals Co., Ltd.), and the like.

  The blending amount of the component (A) is not particularly limited as long as the effects of the present invention are exhibited. However, from the viewpoint of usability and usability, 0.5 mass% or more is preferable, and 1 mass% or more is more preferable. Further, from the viewpoint of the stability of the preparation, it is preferably 25% by mass or less, more preferably 20% by mass or less. From these things, 0.5-25 mass% is preferable in a skin external preparation, and 1-20 mass% is more preferable.

  The (B) component hydrogenated oil is a fatty oil obtained by adding hydrogen to animal or vegetable fatty oils, for example, hydrogenated castor oil, hydrogenated jojoba oil, hydrogenated palm oil, hydrogenated avocado oil, and large hydrogenated oil. Examples include bean oil and hydrogenated whale oil. Especially, since it is excellent in the effect which softens skin softly, it is preferable to use hardened palm oil.

  (B) Although the compounding quantity of a component will not be specifically limited if the effect of this invention is exhibited, from a viewpoint of a usability | use_condition, 0.1 mass% or more is preferable and 0.5 mass% or more is more preferable. Moreover, 20 mass% or less is preferable from a viewpoint of stability of a formulation, and 10 mass% or less is more preferable. From these things, 0.1-20 mass% is preferable in a skin external preparation, and 0.5-10 mass% is more preferable.

  The (C) component 2-methacryloyloxyethyl phosphorylcholine copolymer is a copolymer of 2-methacryloyloxyethyl phosphorylcholine and an ester of methacrylic acid. Examples of the polymer or copolymer of 2-methacryloyloxyethyl phosphorylcholine include polymethacryloyloxyethyl phosphorylcholine, methacryloyloxyethyl phosphorylcholine / butyl methacrylate, methacryloyloxyethyl phosphorylcholine / stearyl methacrylate, and the like. Of these, methacryloyloxyethyl phosphorylcholine / butyl methacrylate is preferred because of its excellent moisturizing sustainability.

Although the compounding quantity of (C) component will not be specifically limited if the effect of this invention is exhibited, 0.001 mass% or more is preferable from a viewpoint of a usability | use_condition, and 0.01 mass% or more is more preferable. Moreover, 1 mass% or less is preferable from a viewpoint of suppressing a feeling of obstruction | occlusion, and 0.5 mass% or less is more preferable. From these things, 0.001-1 mass% is preferable in a skin external preparation, and 0.01-0.5 mass% is more preferable.

In addition, the said (C) component can use a commercial item as it is. Examples of commercially available products that can be used include trade names such as Lipidure HM, PMB, and NR (all manufactured by NOF Corporation).

  Next, the second invention will be described. The external skin preparation of the second invention contains 3-iodo-2-propynylbutyl carbamate (IPBC) as an antiseptic component in the external skin preparation of the first invention. This compound is referred to as cosmetic raw material name: propynyl iodide butylcarbamate. When IPBC is blended in the external preparation for skin of the first invention as an antiseptic component, skin irritation does not occur even when used by humans with sensitive skin, and a sufficient antiseptic effect is exhibited.

  The blending amount of IPBC is not particularly limited as long as the antiseptic effect is exhibited, but from the viewpoint of the antiseptic effect, 0.0001% by mass or more is preferable, and 0.0005% by mass or more is more preferable. Moreover, 0.02 mass% or less is preferable from a viewpoint of skin irritation, and 0.01 mass% or less is more preferable. From these things, 0.0001-0.02 mass% is preferable in a skin external preparation, and 0.0005-0.01 mass% is more preferable.

IPBC can be obtained as a commercial product. Examples of commercially available products that can be used, for example, it is possible to illustrate the product name Guraikashiru 2000, L, (manufactured by both Ron The Japan Co., Ltd.) S and the like.

  In the external preparation for skin of the first invention and the second invention of the present invention, as long as the effects of the present invention are not impaired, the components usually used for cosmetics and quasi-drugs are arbitrarily selected in addition to the above-described components. Can be blended. For example, oils and fats, waxes, hydrocarbons other than α-olefin oligomers, silicones, fatty acid esters, higher alcohols, higher fatty acids and other oily components; nonionic surfactants, anionic surfactants, cationic surfactants, Various amphoteric surfactants; alcohols such as lower alcohols, polyhydric alcohols, saccharides and sterols; thickening polymers such as viscosity minerals and water-soluble polysaccharides; ultraviolet absorbers; anti-inflammatory agents; Agents; sequestering agents; film-forming polymer compounds, inorganic pigments, powders, pigments, pigments, dyes, vitamins, amino acids, astringents, whitening agents, animal and plant extracts, acids, alkalis and other additive components; Water etc. can be illustrated.

  Specifically, examples of the oil component include oils and fats such as olive oil, camellia oil, macadamia nut oil and avocado oil; waxes such as carnauba wax, candelilla wax, jojoba oil, beeswax and lanolin; liquid paraffin, paraffin, petrolatum, Hydrocarbons such as ceresin, microcrystalline wax, squalene, squalane; methylpolysiloxane, methylphenylpolysiloxane, methylcyclopolysiloxane, octamethylcyclotetrasiloxane, octamethylcyclopentasiloxane, decamethylcyclopentasiloxane, methylhydrogenpoly Silicones such as siloxane; isopropyl myristate, 2-octyldodecyl myristate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, di-2-ethylhexane Neopentyl glycol, glycerol tri-2-ethylhexanoate, 2-octyldodecyl oleate, glycerol triisostearate, glycerol tri-2-ethylhexanoate, 2-octyldodecyl oleate, diisostearyl malate, triisostearic acid Fatty acid esters such as glycerol and 2-ethylhexanoic acid diglyceride; higher alcohols such as cetyl alcohol, stearyl alcohol, isostearyl alcohol, 2-octyldodecanol and oleyl alcohol; lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid And higher fatty acids such as acid and oleic acid.

  Surfactants include sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyalkylene alkyl ether, polyoxyalkylene fatty acid ester, polyoxyalkylene alkylphenol, polyoxyethylene sorbit fatty acid ester, polyoxyethylene alkylphenyl formaldehyde condensation Products, polyoxyethylene sterols and derivatives thereof, polyoxyethylene lanolin and derivatives thereof, polyoxyethylene beeswax derivatives, sugar esters, etc .; higher fatty acid soaps, alkyl sulfate esters, alkyl phosphates, poly Oxyethylene alkyl ether sulfate, polyoxyethylene alkyl phenyl ether sulfate, alkyl ether phosphate, alcohol Ether ether carboxylate, acylmethyl taurate, N-acyl-N-methyl-β-alanine, N-acyl glycine, N-acyl glutamate, polyoxyethylene alkyl carboxylate, alkyl phenyl ether sulfonate, Anionic surfactants such as alkylsulfosuccinic acid and salts thereof, N-acyl sarcosine and salts thereof, polyoxyethylene coconut oil fatty acid monoethanolamide sulfate; alkylamine salts, fatty acid amidoamine salts, ester-containing tertiary amine salts, etc. Cyclic 4 such as amine salts, monoalkyl type quaternary ammonium salts, dialkyl type quaternary ammonium salts, trialkyl type quaternary ammonium salts, alkyl quaternary ammonium salts such as benzalkonium type quaternary ammonium salts, and alkyl pyridinium salts Grade ammonium salt, chloro chloride Cationic surfactants such as etonium; glycine-type amphoteric surfactants such as alkylglycine salts, carboxymethylglycine salts, N-acylaminoethyl-N-2-hydroxyethylglycine salts, alkylaminopropionates, alkyliminodi Aminopropionic acid-type amphoteric surfactants such as propionate, aminoacetic acid betaine-type amphoteric surfactants such as alkyldimethylaminoacetic acid betaine, fatty acid amidopropyldimethylaminoacetic acid betaine, and sulfobetaine-type amphoteric surfactants such as alkylhydroxysulfobetaine An amphoteric surfactant such as an agent can be exemplified.

  Examples of alcohols include lower alcohols such as ethanol, isopropanol, and butanol; 1,3-butanediol, glycerin, polyglycerin, ethylene glycol, polyethylene glycol, dipropylene glycol, polypropylene glycol, 1,2-pentanediol, 1 Polyhydric alcohols such as 1,2-hexanediol, 1,2-octanediol, 1,2-decanediol; saccharides such as sorbitol, mannitol, glucose, sucrose, xylitol, lactose, trehalose; sterols such as cholesterol and phytosterol There can be mentioned.

  As the thickening polymer, for example, bentonite, smectite, beidellite-based, nontronite-based, saponite-based, hectorite-based, soconite-based, stevensite-based viscous minerals; carrageenan, guar gum, xanthan gum, gum arabic, Examples include karaya gum, tragacanth gum, dextran, amylose, amylopectin, agarose, pullulan, chondroitin sulfate, sodium pectate, alginic acid, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, and the like.

  Examples of the ultraviolet absorber include benzoic acid-based ultraviolet absorbers such as paraaminobenzoic acid and paraaminobenzoic acid monoglycerin ester; anthranilic acid-based ultraviolet absorbers such as methyl anthranilate and homomenthyl-N-acetylanthranilate; methyl salicylate Salicylic acid UV absorbers such as octyl paramethoxycinnamate and ethyl-4-isopropylcinnamate; benzophenone UV absorbers such as 2,4-dihydroxybenzophenone; amyl salicylate and menthyl Examples include salicylic acid ultraviolet absorbers such as salicylate and benzyl salicylate; urocanic acid ultraviolet absorbers such as urocanic acid and ethyl urocanate.

  Anti-inflammatory agents include allantoin, ictamol, isopropylaminocaproic acid, epsilon aminocaproic acid, indomethacin, guaiazulene, glycyrrhizic acid or its salts, acetylsalicylic acid, chlorpheniramine maleate, lysozyme chloride, diphenhydramine hydrochloride, licorice extract, agetsu extract, camazulene , Sicon extract, hydrocortisone, γ-oryzanol, hinokitiol, azulene and the like.

  Examples of the antioxidant include α-tocopherol and derivatives thereof, ascorbic acid and derivatives thereof, erythorbic acid, dibutylhydroxytoluene, butylhydroxyanisole, gallic acid esters, sulfurous acid, bisulfite, thiosulfuric acid, thiolactic acid, thioglycol An acid, L-cysteine, N-acetyl-L-cysteine, etc. can be mentioned.

  Examples of the sequestering agent include edetate, phosphoric acid, sodium polyphosphate, sodium metaphosphate, alanine, sodium oxalate, nitrilotriacetic acid, 1,2-diaminocyclohexane-tetraacetic acid, N-oxyethylethylenediamine- Triacetic acid, ethylene glycol bis-tetraacetic acid, ethylenediamine-tetrapropionic acid, 1-hydroxyhexane-1,1-diphosphonic acid, phosphonoacetic acid, diethylenetriaminepentaacetic acid, 1,2-cyclohexanediaminetetraacetic acid, ethylenediaminediacetic acid, triethylene Examples thereof include tetramine hexaacetic acid.

  The external preparation for skin of the present invention can be used as pharmaceuticals, quasi drugs, cosmetics and the like. Specifically, it can be suitably used for lotion, milky lotion, skin cream, cosmetic liquid, aftershave lotion, ointment and the like.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not limited only to this Example. The content represents “mass%” unless otherwise specified.

[Sample preparation 1]
According to the composition described in Tables 1-2, each skin external preparation of an Example and a comparative example was adjusted in accordance with the conventional method, and it used for the following evaluation test. In the table, the trade name Lipidur PMB (pure content 3.5%, 1,3-butylene glycol solution (manufactured by NOF Corporation)) was used as the 2-methacryloyloxyethyl phosphorylcholine copolymer solution.

[Test Example 1: Usability Evaluation Test]
Each sample of Examples and Comparative Examples was used by 20 subjects in the form of a face skin cream (moisturizing cream). Elongation during application, stickiness after application, feeling of blockage, moist feeling, skin 8 hours after application The moisture and softness were evaluated based on the following evaluation criteria. The results are shown in Tables 1-2.

<Evaluation criteria for good elongation>
○: 15 or more out of 20 responded that the growth was good.
Δ: 7 to 14 out of 20 responded that the growth was good.
×: 6 or less out of 20 responded that the growth was good.

<Evaluation criteria for stickiness>
○: 15 or more of 20 responded that there was no stickiness.
Δ: 7 to 14 out of 20 responded that there was no stickiness.
X: 6 or less out of 10 responded that there was no stickiness.

<Evaluation criteria for occlusion>
○: 15 or more of 20 respondents do not feel that their face is covered with a film.
Δ: 7 to 14 out of 20 respondents do not feel that their face is covered with a film.
×: 6 or less out of 20 respondents do not feel that their face is covered with a film.

<Evaluation criteria for moisture>
○: More than 15 out of 20 responded that they felt moist.
Δ: 7 to 14 out of 20 responded that they felt moist.
×: 6 or less out of 20 responded that they felt moist.

<Evaluation criteria for skin softness>
○: 15 or more of 20 responded that their skin became softer than before use.
Δ: 7 to 14 out of 20 responded that their skin became softer and softer than before use.
×: 6 or less of 20 responded that their skin became softer than before use.

  From the results of Tables 1 and 2, the external preparation for skin of the first invention has good elongation at the time of application, no stickiness after application, excellent moistness and its sustainability, and even when used on the face. It can be seen that the skin becomes soft and soft without feeling the occlusion characteristic of the compound.

[Sample preparation 2]
The composition of Example 1 except purified water, 0.03 wt% of Guraikashiru 2000 as an antiseptic component (trade name: Ron The Japan Ltd.) was added, implement what make a total volume of 100 wt% with purified water Example 5 It was. Similarly, 0.1% by mass of methylparaben was added as a preservative component to the composition of Example 1 and the total amount was 100% by mass with purified water as Comparative Example 4, and no preservative component was added (same as Example 1). ) Was designated as Comparative Example 5.

  Glycacil 2000 (trade name) used is an aqueous solution containing 6% by mass of propynyl iodide butylcarbamate and 47% by mass of hydroxypropylcyclodextrin.

[Test Example 2: Preservation test]
Staphylococcus aureus NBRC13276 (Staphylococcus aureus) was used as a test bacterium. Also, Candida albicans NBRC1594 (oral candidiasis) was used as yeast, and Aspergillus niger NBRC9455 (black mold) was used as mold. Pre-cultured cultures of these bacteria were diluted to about 10 ⁷ cells / mL for general bacteria, about 10 ⁵ cells / mL for yeast, and about 10 ⁴ cells / mL for fungi. It was. The number of bacteria was confirmed by the colony count method.

  20 g of each sample of Example 5 or Comparative Examples 4 to 5 is put into a glass container that has been sterilized by dry heat, 0.2 mL of the above-mentioned bacterial suspension is inoculated, general bacteria at 35 ° C., yeast and mold 25 Culturing was performed at 0 ° C. About 1 and 7 days after inoculation for general bacteria and yeast, and 7 and 14 days for mold, 1 g of each sample was taken out, diluted with physiological saline, and mixed in an agar medium and cultured for 72 hours. After incubation, the number of remaining bacteria in each sample was confirmed, and antiseptic power was determined according to the following evaluation criteria. The results are shown in Table 3.

<Evaluation criteria for antiseptic power>
○: The number of bacteria is less than 10 cells / mL.
(Triangle | delta): It is the number of bacteria of 10-1 * 10 < ³ > cells / mL.
×: The number of bacteria exceeds 1 × 10 ³ cells / mL.

[Test Example 3: Skin irritation test]
The skin creams of Example 5 and Comparative Example 4 were actually used and tested for skin irritation. That is, 20 female evaluators of 25 to 35 years old who are self-recognized as sensitive skin, apply a suitable amount after facial cleansing and after lotion, conduct a 2-week continuous test, and check for skin irritation during use. We had you answer by questionnaire after using.

  As a result, in Example 5, there were 0 evaluators who felt the stimulus among 20 people, whereas in Comparative Example 4, there were 3 evaluators who felt the stimulus among 20 people.

  From the results of Test Examples 2 to 3, it can be seen that the external preparation for skin of the second invention has a sufficient antiseptic effect and does not cause skin irritation even when used by humans with sensitive skin.

  Hereinafter, the formulation example of the external preparation for skin which concerns on this invention is shown. In addition, a compounding quantity is the mass%.

(Formulation example 1: skin cream)
α-olefin oligomer 15.0
Hydrogenated palm oil 3.0
2-Methacryloyloxyethyl phosphorylcholine copolymer solution [Lipidure PMB (trade name, manufactured by NOF Corporation)] 5.0
Behenyl alcohol 3.0
Stearic acid 1.0
Glyceryl tri-2-ethylhexanoate 5.0
Xanthan gum 0.05
Carboxyvinyl polymer 0.4
Polyoxyethylene sorbitan monostearate 1.5
Glyceryl stearate 0.5
1,3-butylene glycol 10.0
1,2-octanediol 0.2
Glycerin mono-2-ethylhexyl ether 0.35
Glycerin 5.0
Potassium hydroxide appropriate amount Tocopherol appropriate amount Metal chelating agent appropriate amount
Purified water residue Total 100.0

(Formulation example 2: skin milk)
α-olefin oligomer 5.0
Hydrogenated palm oil 1.5
2-Methacryloyloxyethyl phosphorylcholine copolymer solution [Lipidure PMB (trade name, manufactured by NOF Corporation)] 10.0
Behenyl alcohol 1.0
Stearic acid 1.0
Glyceryl tri-2-ethylhexanoate 5.0
Xanthan gum 0.1
Carboxyvinyl polymer 0.2
Polyoxyethylene sorbitan monostearate 1.0
Glyceryl stearate 1.0
1,3-butylene glycol 10.0
1,2-octanediol 0.2
Glycerin mono-2-ethylhexyl ether 0.35
Glycerin 2.5
Diglycerin 2.5
Dipropylene glycol 8.0
Potassium hydroxide appropriate amount Tocopherol appropriate amount Metal chelating agent appropriate amount
Purified water residue Total 100.0

Claims (6)

  An external preparation for skin comprising (A) an α-olefin oligomer, (B) hydrogenated oil, and (C) a polymer or copolymer of 2-methacryloyloxyethyl phosphorylcholine.   The external preparation for skin according to claim 1, wherein the component (B) is hydrogenated palm oil.   The component (C) is at least one selected from the group consisting of polymethacryloyloxyethyl phosphorylcholine, methacryloyloxyethyl phosphorylcholine / butyl methacrylate and methacryloyloxyethyl phosphorylcholine / stearyl methacrylate. The skin external preparation as described. The component (A) contains 0.5 to 25% by mass, the component (B) 0.1 to 20% by mass, and the component (C) 0.001 to 1% by mass. The skin external preparation as described in any one of 1-3. The skin external preparation according to any one of claims 1 to 4 , which contains 3-iodo-2-propynylbutyl carbamate as an antiseptic component. The skin external preparation according to claim 5, wherein the 3-iodo-2-propynylbutyl carbamate is contained in an amount of 0.0001 to 0.02% by mass.