JP7573995B2 - Hair cosmetic composition - Google Patents

Description

The present invention relates to a hair cosmetic composition, and more specifically to a hair cosmetic composition that imparts treatment effects such as smoothness, moisturizing, and shine to damaged hair, while not making the hair heavy or sticky, even for children's fine hair.

To give hair a smooth, shiny texture and make it easier to comb, leave-in hair cosmetics with conditioning effects are used, and hair treatments generally under names such as hair essence, hair cream, hair oil, and hair liquid are available on the market.

In order to give hair a smooth and shiny texture, oils such as silicone oil, polymeric dimethylpolysiloxane, and polymeric methylphenylpolysiloxane are used after being solubilized, emulsified, or dissolved. Silicone oil in particular has low surface tension, blends well with hair, and can give hair a good shine, so many hair cosmetics containing silicone oil have been proposed (for example, Patent Document 1).

In addition, a hair cosmetic composition has been proposed that contains an ester compound of a dibasic acid and one or more oils selected from the group consisting of volatile oils, ester oils, hydrocarbon oils, animal and vegetable oils, and silicone oils, in order to improve the surface and internal condition of damaged hair while giving the hair firmness, body, and natural shine, while achieving a light finish that is not sticky (for example, Patent Document 2).

JP 2006-290820 A International Publication No. 2010/087004 Pamphlet

However, leave-on oil-type hair cosmetics such as those described in Patent Document 1 have the problem that when used on children's fine hair, the hair becomes sticky and heavy.

On the other hand, hair cosmetics with a light, smooth feel and little stickiness as described in Patent Document 2 do not provide sufficient conditioning effect on damaged adult hair, and there is a problem in that they do not provide enough smoothness, moisture, or shine to hair.

Therefore, in order to solve these problems, the objective of the present invention is to provide a hair cosmetic composition that imparts treatment effects such as smoothness, moisturizing, and shine to damaged hair, while not making the hair heavy or sticky, even for children's fine hair.

As a result of intensive research by the present inventors to solve the above problems,
(A) PEG-20 glyceryl triisostearate,
(B) An ester compound represented by the following general formula (1): R ¹ O-(AO) _n -COR ² (1)
(Wherein,
^R1 represents a benzyl group;
^R2 represents a linear or branched alkyl or alkenyl group having 1 to 25 carbon atoms;
AO represents an alkyleneoxy group having 2 to 4 carbon atoms;
n is an integer from 1 to 50,
When n is 2 or more, the n AO groups may be the same or different.
The inventors have found that the above-mentioned problems can be solved by a hair cosmetic composition comprising (C) one or more ester oils that are liquid at 20°C and different from the component (B), and have completed the present invention.

The first invention is
(A) PEG-20 glyceryl triisostearate,
(B) an ester compound represented by the following general formula (1):
R ¹ O-(AO) _n -COR ² (1)
(Wherein,
^R1 represents a benzyl group;
^R2 represents a linear or branched alkyl or alkenyl group having 1 to 25 carbon atoms;
AO represents an alkyleneoxy group having 2 to 4 carbon atoms;
n is an integer from 1 to 50,
When n is 2 or more, the n AO groups may be the same or different. ), and (C) one or more ester oils that are liquid at 20°C other than component (B).

The hair cosmetic composition of the present invention can impart treatment effects such as smoothness, moisture, and shine to damaged hair, while also making even children's fine hair less heavy and sticky.

The present invention is described in detail below.

[Hair cosmetic composition]
In the present invention, the hair cosmetic composition refers to a hair cosmetic composition characterized by containing (A) PEG-20 glyceryl triisostearate, (B) a specific ester compound, and (C) an ester oil that is liquid at 20°C and different from the component (B). By blending these components (A) to (C) in a specific ratio, the effects of the present invention can be achieved. The hair cosmetic composition of the present invention may be of either a leave-in type or a wash-off type as long as it can achieve the effects of the present invention, but is preferably a leave-in type hair cosmetic. Here, the "leave-in type hair cosmetic" refers to a so-called leave-in type hair cosmetic that is applied to the hair and left on without being washed off.

Examples of leave-in-bath hair cosmetics include, but are not limited to, hair foam, hair wax, pomade, hair gel, hair essence, hair cream, hair spray, hair mist, hair water, hair liquid, hair oil, hair color spray, hair tonic, hair conditioner, etc.

In the present invention, the formulation of the hair cosmetic can be arbitrarily selected from known formulations depending on the application and intended use. For example, it can be in the form of a liquid, emulsion, cream, gel, paste, foam, etc., and in the case of foam, it can be in either an aerosol or non-aerosol form.

Below, we will explain in detail each component of the hair cosmetic composition of the present invention.

[(A) PEG-20 glyceryl triisostearate]
The PEG-20 glyceryl triisostearate (A) in the present invention is a triester obtained by addition polymerization of ethylene oxide to isostearic acid and ester bonding with glycerin, a type of polyhydric alcohol, and is a nonionic surfactant classified as an ethylene oxide condensed polyoxyethylene polyhydric alcohol fatty acid ester. In general, the PEG-20 glyceryl triisostearate (A) is blended in hair cosmetics for the purpose of an emollient and an emulsifier. In the present invention, a commercially available product may be used as the PEG-20 glyceryl triisostearate (A). Commercially available products that can be used in the present invention include, but are not limited to, CITHROL 10GTIS (manufactured by Croda Japan Co., Ltd.), EMALEX GWIS-320 (manufactured by Nippon Emulsion Co., Ltd.), EMALEX GWIS-320EX (manufactured by Nippon Emulsion Co., Ltd.), M Fine Oil ISG-20T (manufactured by Miyoshi Oil Co., Ltd.), NIKKOL TGI-20 (manufactured by Nikko Chemicals Co., Ltd.), Hyper Oil GW-32 (manufactured by Koyo Fine Chemical Co., Ltd.), Uniox GT-20IS (manufactured by NOF Corporation), Salacos GE-318 (manufactured by Nisshin Oillio Group, Ltd.), and the like. Such PEG-20 glyceryl triisostearate can be used alone or in a mixture of two or more kinds.

The content of (A) PEG-20 glyceryl triisostearate in the hair cosmetic composition of the present invention is preferably 5% by mass to 15% by mass, and more preferably 7% by mass to 12% by mass. If the content of (A) PEG-20 glyceryl triisostearate in the hair cosmetic composition of the present invention is 5% by mass or more, it is possible to impart treatment effects such as smoothness, moistness, gloss, and manageability to hair, and if it is 15% by mass or less, excessive stickiness or stickiness does not occur.

[(B) Ester compound]
The ester compound (B) in the present invention is represented by the following general formula (1):
R ¹ O-(AO) _n -COR ² (1)
(Wherein,
^R1 represents a benzyl group;
^R2 represents a linear or branched alkyl or alkenyl group having 1 to 25 carbon atoms;
AO represents an alkyleneoxy group having 2 to 4 carbon atoms;
n is an integer from 1 to 50,
When n is 2 or more, the n AO groups may be the same or different.
It is expressed as:

In the ester compound of the general formula (1), R ¹ is a benzyl group from the viewpoint of exerting the effects of the present invention. When R ¹ is a benzyl group, the ester compound of the component (B) has high compatibility and low viscosity, which is preferable.

As the ester compound represented by general formula (1) (B) in the present invention, an ester of a propylene oxide 3-mol adduct of benzyl alcohol and myristic acid (myristic acid PPG-3 benzyl ether) and an ester of a propylene oxide 3-mol adduct of benzyl alcohol and 2-ethylhexyl acid (ethylhexanoic acid PPG-3 benzyl ether) are preferred. These components are generally blended in hair cosmetics for the purposes of an emollient, lubricant, surface modifier, and anti-fading agent. In addition, in the present invention, a commercially available product may be used as the ester compound represented by general formula (1) (B). Examples of commercially available products that can be used in the present invention include, but are not limited to, Crodamol STS and Crodamol SFX (both manufactured by Croda), and Crodamol STS is preferred.

The content of the ester compound (B) of general formula (1) in the hair cosmetic composition of the present invention is preferably 3% by mass to 20% by mass, more preferably 5% by mass to 15% by mass. If the content of the ester compound (B) of general formula (1) in the hair cosmetic composition of the present invention is 3% by mass or more, the sliminess and stickiness of the above component (A) can be reduced. Furthermore, if the content of component (B) is 20% by mass or less, damaged hair will not become dry. Therefore, within this range, even children's thin hair will not become sticky, and a fluffy and light state can be achieved.

[(C) Ester oil that is liquid at 20°C]
The ester oil (C) that is liquid at 20° C. used in the hair cosmetic composition of the present invention is an ester oil mainly composed of an ester of a fatty acid and an alcohol, and is generally blended in cosmetics for the purpose of hair conditioning agents, emollients, solubilizers, fat-adding agents, texture improvers, lubricants, surface modifiers, percutaneous absorption promoters, antioxidants, ultraviolet absorbers, etc. Examples of the ester oil (C) that is liquid at 20° C. in the present invention include, but are not limited to, esters of linear higher fatty acids and lower alcohols such as isopropyl myristate, butyl myristate, isopropyl palmitate, ethyl stearate, butyl stearate, ethyl oleate, and ethyl linoleate, cetyl caprylate, hexyl laurate, decyl myristate, myristyl myristate, cetyl palmitate, stearyl stearate, decyl oleate, and cetyl ricinoleate. Esters of linear higher fatty acids and linear higher alcohols; esters of linear fatty acids and branched alcohols such as isostearyl laurate, isotridecyl myristate, isocetyl myristate, isostearyl myristate, octyldodecyl myristate, octyl palmitate, isocetyl palmitate, isostearyl palmitate, isocetyl stearate, octyldodecyl stearate, isodecyl oleate, and octyldodecyl oleate; Esters of branched fatty acids and lower alcohols; esters of branched fatty acids and linear higher alcohols, such as cetyl octanoate, cetostearyl octanoate, stearyl octanoate, and hexyl isostearate; esters of fatty acids and polyhydric alcohols, such as ethylene glycol dioctanoate, ethylene glycol dioleate, propylene glycol dicaprylate, propylene glycol dicaprate, propylene glycol dioleate, neopentyl glycol dicaprate, and pentaerythritol tetra 2-ethylhexanoate. esters of branched fatty acids and branched alcohols such as octyldodecyl neopentanoate, isocetyl octanoate, isostearyl octanoate, octyl isopelargonate, octyldodecyl neodecanoate, and isostearyl isostearate; lactate esters such as lauryl lactate, myristyl lactate, and cetyl lactate; esters of dibasic acids such as triethyl citrate, trioctyl citrate, triisocetyl citrate, diisostearyl malate, dioctyl succinate, diethyl sebacate, and dioctyl sebacate; etc. In the present invention, commercially available ester oils (C) that are liquid at 20° C. may be used. Commercially available products that can be used in the present invention include, but are not limited to, Salacos 816T (manufactured by The Nisshin Oillio Group, Ltd.), CEH (manufactured by Kokyu Alcohol Kogyo Co., Ltd.), Salacos 99 (manufactured by The Nisshin Oillio Group, Ltd.), Salacos P-8 (manufactured by The Nisshin Oillio Group, Ltd.), Salacos 5408 (manufactured by The Nisshin Oillio Group, Ltd.), Millitol 318 (manufactured by BASF Japan Ltd.), Ubinal MC-80 (manufactured by BASF Japan Ltd.), Parasol MCX-AS (manufactured by DSM Nutrition Japan Co., Ltd.), etc. Such ester oils can be used alone or in combination of two or more kinds.

The blending amount of component (C) in the hair cosmetic composition of the present invention is preferably 10% by mass to 30% by mass, more preferably 15% by mass to 25% by mass. When the content of (C) the ester oil that is liquid at 20° C. in the hair cosmetic composition of the present invention is 10% by mass or more, treatment effects such as smoothness, moist feeling, gloss and manageability can be imparted to the hair, and when it is 30% by mass or less, excessive stickiness does not occur.

In addition, in the hair cosmetic composition of the present invention, the total content of the above-mentioned components (B) and (C) is preferably 15% by mass to 40% by mass, and more preferably 20% by mass to 35% by mass. If the total content of the above-mentioned components (B) and (C) in the hair cosmetic composition of the present invention is within this range, it is possible to finish even children's fine hair without making the hair too heavy when applied, and to achieve a state with little stickiness.

[(D) Other Components]
The hair cosmetic composition of the present invention contains the above-mentioned components (A) to (C) as essential components and is prepared by adding these to a liquid to which a solvent or the like has been added. In addition to these essential components, other components (D) that are usually added to hair cosmetics can also be added depending on the purpose, so long as the effects of the present invention are not impaired.

Examples of other components as described above include nonionic surfactants such as water, polyoxyethylene alkyl ethers, polyoxyethylene sorbitan fatty acid esters, and glycerin fatty acid esters; cationic surfactants such as stearyl trimethylammonium chloride and alkyl trimethylammonium chloride; higher alcohols such as cetanol and stearyl alcohol; humectants such as glycerin, propylene glycol, butylene glycol, dipropylene glycol, and glycosyl trehalose; higher fatty acids such as stearic acid, behenic acid, oleic acid, isostearic acid, and 2-ethylhexanoic acid; hydrocarbons such as liquid isoparaffin, petrolatum, and squalane; anti-dandruff ingredients such as zinc pyrithione and benzalkonium chloride; lower alcohols such as ethanol, methanol, propyl alcohol, and isopropyl alcohol; cooling agents such as 1-menthol and peppermint oil; almond oil, avocado oil, linseed oil, Argania spinosa kernel oil, apricot kernel oil, strawberry seed oil, perilla oil, olive oil, orange oil, rose canina oil, apricot kernel oil, and chrysanthemum _oil . _{Vegetable oils such as Lamium officinalis seed oil} , grape seed oil, sesame seed oil, rice bran oil, camellia oil, safflower oil, shea butter, peppermint oil, soybean oil, tea seed oil, tea seed oil, camellia seed oil, rapeseed oil, sunflower seed oil, grape seed oil, hazelnut oil, jojoba oil, peach kernel oil, coconut oil, tea oil, lemon oil, rosehip oil, and rosemary oil; L-aspartic acid, sodium L-aspartate, DL-alanine, L-arginine, glycine, L-glutamic acid, L-cysteine, and L-threonine anti-inflammatory agents such as glycyrrhetic acid and/or derivatives thereof, and glycyrrhizinic acid and/or salts thereof; propellant gases such as liquefied petroleum gas and dimethyl ether; low molecular weight compounds such as 12-hydroxystearic acid, dibenzylidene sorbitol, amino acid derivatives, and oil gelling agents such as polyethylene, polyacrylic acid derivatives, dextrin derivatives; and other ultraviolet absorbers, preservatives, sugars, plant-derived extracts, animal-derived extracts, fragrances, colorants, sequestering agents, antioxidants, and various other drugs.

The hair cosmetic composition of the present invention can be used in liquid hair cosmetics such as hair lotion, hair liquid, hair mist, hair water, hair oil, etc.; milky or creamy hair cosmetics such as hair cream, hair treatment, hair milk, hair gel, etc.; aerosol hair cosmetics such as hair foam, hair spray, etc., and is particularly preferably used in leave-on type hair cosmetics such as hair oil, hair oil gel, hair oil mist, hair spray, etc. The hair cosmetic composition of the present invention can be produced by a conventional method.

The following provides a more detailed explanation of the embodiments of the present invention by way of examples. However, the present invention is not limited to these examples.

[Sample preparation]
The following samples were prepared by a conventional method using the ingredients and amounts shown in Tables 1 and 2 below. Other ingredients included hydrogenated polyisobutene, water, butylene glycol (BG), fragrance, etc. Comparative Example 7 is a comparative example of a current hair oil product that contains dimethicone instead of ingredient (A).

[Preparation of hair samples]
In order to evaluate the usefulness of the hair cosmetic composition of the present invention, first, hair was treated by the following method. Commercially available hair (10 g, 30 cm, Beaulax) was shampooed with 2 g of a 10% by mass aqueous solution of sodium polyoxyethylene (2E.O.) lauryl ether sulfate, thoroughly rinsed with hot water, towel-dried, and then dried with a hair dryer. Next, 0.5 g of the hair cosmetic composition of the Examples and Comparative Examples shown in Tables 1 and 2 below was uniformly applied as hair oil, and the hair was naturally dried, and the treatment effect on the hair, such as smoothness and luster, was evaluated. In addition, the condition of the hair after application of the hair cosmetic composition to adult hair and child hair was evaluated.

[Evaluation of Hair Samples]
The hair samples prepared as described above were evaluated for the following indicators.

(1) Smoothness The smoothness of hair was evaluated by measuring the dynamic friction coefficient. The dynamic friction coefficient of hair was measured using a friction tester (KES-SE type, manufactured by Kato Tech Co., Ltd.) with a silicone sheet attached as a friction element, and the dynamic friction coefficient (MIU value) was measured under conditions of a load of 50 g and a moving speed of 1 mm/sec, and the average value of 20 hair bundles was calculated. The lower the dynamic friction coefficient, the smoother the hair. The evaluation criteria are as follows:
◎: Very good, less than 0.2 ○: Good, 0.2 or more and less than 0.3 △: Slightly poor, 0.3 or more and less than 0.4 ×: Poor, 0.4 or more

(2) Luster Using the SAMBA Hair System (manufactured by Bossa Nova Vision), the luster value of 20 hair bundles was measured and the average value was calculated. Note that the higher the luster value, the more lustrous the hair. The evaluation criteria are as follows:
◎: Very good 60 or more ○: Good 50 or more but less than 60 △: Slightly poor 40 or more but less than 50 ×: Poor Less than 40

(3) Condition of adult hair Twenty trained expert panelists evaluated the condition of adult hair after applying the hair cosmetic composition. The condition of adult hair was expressed as the average value of the evaluation results of the 20 panelists. The evaluation criteria were as follows:
1: After application, the hair is dry and brittle.
2: The hair after application is slightly lacking in moisture, but is not frizzy and is in a good condition. 3: The hair after application is moist and in an ideal condition.
4: After application, hair feels slightly moist but not heavy and in good condition.
5: After application, hair feels too sticky and heavy.

(4) Condition of Children's Hair Twenty trained expert panelists evaluated the condition of the hair of children aged 12 or less after applying the hair cosmetic composition. The condition of the children's hair was expressed as the average value of the evaluation results of the 20 panelists. The evaluation criteria were as follows:
1: After application, the hair is dry and brittle.
2: The hair after application is slightly lacking in moisture, but is not frizzy and is in a good condition. 3: The hair after application is moist and in an ideal condition.
4: After application, hair feels slightly moist but not heavy and in good condition.
5: After application, hair feels too sticky and heavy.

The formulations and evaluation results for Examples 1 to 8 and Comparative Examples 1 to 7 are shown in Tables 1 and 2 below.

As is clear from Tables 1 and 2, Examples 1 to 8 relating to the hair cosmetic composition of the present invention all showed superior performance compared to the compositions of Comparative Examples 1 to 7. Comparative Example 7 is an example of a commercially available product containing dimethicone instead of component (A), but compared to these, it showed equal or superior results in terms of smoothness, moist feeling, and shine, and the condition of the hair after application to children's hair showed excellent results. Therefore, it was found that the hair cosmetic composition of the present invention shows excellent performance in that it imparts treatment effects such as smoothness, moist feeling, and shine to damaged hair, while being less heavy and sticky even to children's thin hair.

The following are examples of formulations of the hair cosmetic composition of the present invention. The hair cosmetic compositions of these formulations were also examined in terms of the above-mentioned hair treatment effects such as smoothness, moisturizing feeling, and shine, as well as sensory tests (condition of hair after application to adult hair and condition of hair after application to child hair). All formulations were found to have excellent properties and were favorable.

Formulation Example 1 (Hair Oil) (%)
(1) PEG-20 glyceryl triisostearate 10.0
(2) Myristic acid PPG-3 benzyl ether 10.0
(3) Ethylhexyl palmitate 20.0
(4) Ethylhexyl methoxycinnamate 1.0
(5) Hydrogenated polyisobutene 55.0
(6) BG 1.0
(7) Shea butter 0.5
(8) Lactoferrin 0.5
(9) Yogurt liquid 0.5
(10) Glycyrrhizic acid 2K 0.1
(11) Fragrance 0.3
(12) Water Residual

(Production method) (2), (3), (4), (7), and (11) were uniformly dispersed in (5), and (1), (6), (8), (9), (10), and (12) were uniformly mixed and dissolved in a separate tank and added to the mixture. The mixture was then mixed uniformly and filled into a container equipped with a dispenser pump to prepare the hair oil.

Formulation Example 2 (Hair Oil Gel) (%)
(1) PEG-20 glyceryl triisostearate 12.0
(2) Myristic acid PPG-3 benzyl ether 12.0
(3) Cetyl ethylhexanoate 20.0
(4) Caprylic/capric triglyceride 5.0
(5) Pentaerythrityl tetraethylhexanoate 1.0
(6) Isododecane 35.0
(7) Dextrin palmitate 7.0
(8) BG 6.0
(9) Shea butter 0.5
(10) Lactoferrin 0.5
(11) Yogurt liquid 0.5
(12) Glycyrrhizic acid 2K 0.1
(13) Fragrance 0.3
(14) Water Residual

(Production method) (2), (4), and (5) were uniformly dispersed in (3), and after heating, (7) was added and uniformly mixed and dissolved, and then (6), (9), and (13) were added and uniformly mixed. (1), (8), (10), (11), (12), and (14) were uniformly dispersed in a separate tank, mixed with the above-mentioned heated mixture, cooled, and filled into a container with a dispenser pump to prepare a hair oil gel.

Claims (1)

(A) 5 to 15% by mass of PEG-20 glyceryl triisostearate,
(B) 3 to 20% by mass of an ester compound represented by the following general formula (1),
R ¹ O-(AO) _n -COR ² (1)
(Wherein,
^R1 represents a benzyl group;
^R2 represents a linear or branched alkyl or alkenyl group having 1 to 25 carbon atoms;
AO represents an alkyleneoxy group having 2 to 4 carbon atoms;
n is an integer from 1 to 50,
and (C) 10 to 30 mass % of one or more ester oils that are liquid at 20° C. and are different from component (B).