JPS627888B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a hair cosmetic, and more particularly to a hair cosmetic that has the ability to correct a hairstyle that has been disturbed due to sleeping, etc., and also has the ability to maintain the hairstyle after hair styling. Conventionally, water is the main ingredient, cationic surfactants,
Compositions containing one or more types of water-soluble polymers or glycols are provided as hair cosmetics to correct unruly hairstyles due to sleeping, etc., but these have poor ability to hold the hairstyle after hair styling, and also have poor finish. The hair on the back of my head is sticky. A composition whose main ingredient is a solvent in which ethyl alcohol accounts for more than half of the amount of water and an oily polyalkylene glycol dissolved uniformly has the ability to hold a hairstyle, but it cannot correct unruly hairstyles such as curly hair. It also has disadvantages such as a heavy and sticky finish. Compositions containing polyoxyethylene alkyl esters obtained by adding ethylene oxide to fatty acids or fatty alcohols and polyoxyethylene alkyl ethers dissolved in a water-rich system corrode celluloid glasses and combs. , and the disadvantage is that the finish is heavy. Compositions containing the above-mentioned polyoxyethylene alkyl ester and polyoxyethylene alkyl ether phosphate ester salts as oil components cannot completely eliminate celluloid corrosion, and have the disadvantage that the finish is heavy and sticky. Compositions containing alkyl ethers obtained by replacing a portion of the ethylene oxide with propylene oxide, butylene oxide, etc. as oil components also have a heavy finish and cannot fully eliminate the problem of stickiness. Ethyl alcohol has a high ethyl alcohol content in order to uniformly dissolve oils that do not corrode celluloid, such as polyoxypropylene alkyl ether and polyoxybutylene alkyl ether.
The composition added to the water-mixed system has almost no effect on restoring a hairstyle that is disheveled due to sleeping. Compositions further containing silicone oil, lanolin oil, etc. are also known. However, it corrects curly hair, has the ability to hold the hairstyle, and has a light finish.
A hair cosmetic that is not sticky has not been found. The purpose of the present invention is to correct curly hair, maintain the hairstyle after hair styling, and have a light finish and no stickiness.
Another object of the present invention is to provide a hair cosmetic that does not corrode celluloid. That is, the hair cosmetic of the present invention is a solvent in which the mixing weight ratio of water and ethanol is 90/10 to 50 to 50 (40% by weight or more of (referred to as component A); phosphorus of polyoxypropylene polyhydric alcohol ether). The mixing weight ratio of the acid ester salt and the phosphate ester salt of polyoxypropylene alkyl ether is 10/90 to 90/
10 (referred to as component B); and general formula (hereinafter in the specification, formula ())
) (In the formula, P is a number from 1 to 5, R is hydrogen or a methyl group, x is a number from 1 to 20, m is a number from 3 to 50, and n
represents a number from 5 to 50, respectively. ) polyoxyalkylenemethylpolysiloxane (component C
Point W on the triangular coordinates where the blending ratio of each component A, B, and C is shown below [(A)94.9:(B)5:(C)0.1 〕 10]. The above ranges are illustrated in triangular coordinates in the accompanying drawings. If the weight mixing ratio of water and ethanol in the solvent for component A is less than 90/10, the volatility will deteriorate and the drying time after application of the cosmetic will become longer, which is undesirable. Alcohol mixing ratio is 50/50
If it exceeds this, the straightening effect will deteriorate and the celluloid will be eroded. If component A is less than 40% by weight, the effect of restoring sleepiness cannot be obtained. A particularly preferred range of component A is 45 to 90% by weight. The phosphate ester salt of polyoxypropylene polyhydric alcohol ether, which is one of the components B of the hair cosmetic of the present invention, is a polypropylene ester with an average molecular weight of 500 to 10,000 obtained by adding propylene oxide to a polyhydric alcohol such as glycerin. Polyhydric alcohol ether is phosphoric acid esterified, and then 20 to 100% of the chemical equivalent is neutralized with an alkali metal such as sodium or potassium or an organic amine such as monoethanolamine, triethanolamine, or aminomethylpropanediol. A representative example thereof is shown by the structural formula below. The molecular weight of the polypropylene glycol above is 500
In the case of Suemitsu, the hair styling ability is inferior, and on the other hand, if it exceeds 10,000, the result will be heavy. The phosphoric acid ester salt of polyoxypropylene alkyl ether, which is the remaining component constituting component B of the present invention, has 22 or less carbon atoms, preferably 2 to 12 carbon atoms.
After polyoxypropylene alkyl ether with an average molecular weight of 500 to 10,000 obtained by adding propylene oxide to a monohydric alcohol is phosphoric acid esterified, an alkali Obtained by neutralizing 20-100% of the chemical equivalent with a metal or organic amine salt. A representative example thereof is shown by the structural formula below. (However, in the above structural formula, n and n+n' are each a number from 10 to 150). The phosphoric acid ester salt of polyoxypropylene polyhydric alcohol ether and the phosphoric acid ester salt of polyoxypropylene alkyl ether, which constitute component B, are prepared after their respective production is completed.
Although they may be mixed at a mixing weight ratio of 10/90 to 90/10, they may be mixed in the middle of each manufacturing process and then subjected to a predetermined treatment. That is, after phosphoric acid esterifying a mixture of polyoxypropylene polyhydric alcohol ether and polyoxypropylene alkyl ether, neutralization treatment may be performed, or after separately phosphoric acid esterifying the above two types of ethers, They may be mixed in a predetermined ratio and then neutralized. If component B consisting of the above two types of phosphate ester salts is less than 5% by weight, the hair styling ability will be poor, and if it exceeds 50% by weight, the finish will be heavy and sticky, and the uniform solution necessary for hair cosmetics will not be obtained. I can't get it. A particularly preferable range of component B is 7 to
It is 40% by weight. In the above formula () showing the structure of the polyoxyalkylene methyl polysiloxane constituting component C of the hair cosmetic of the present invention, when the value of P is 0, the oxyethylene chain is directly added to the siloxane chain, so hydration is Decomposition occurs, and as a result, component C separates in the cosmetic composition, which is undesirable. On the other hand, if P is 6 or more, component C will not dissolve uniformly in the product composition. If R is an alkyl group containing more than ethyl group, component C will not dissolve uniformly in the product. x indicates the average number of added moles of ethylene oxide,
If it is 0, component C will not be uniformly dissolved in the product, and if it is 21 or more, the finished product will be heavy. If m is less than 2, component C will not dissolve in the product, and if it is more than 51, the finished product will be heavy. When n is 4 or less, celluloid corrosion occurs, and when n is 51 or more, uniform dissolution is not achieved. Component C of the present invention also has the effect of significantly lowering the surface tension of the hair cosmetic product, especially component C that constitutes the oil component of the product, and is therefore an essential component to prevent the finish from becoming sticky. Recently, in addition to the essential functions of this type of hair cosmetic, it has become an essential requirement that the finish be non-sticky. The ingredients of the present invention can lower the surface tension of products, especially oils, than the critical surface tension of hair, which is 26.5 dyn/cm, and can be uniformly diffused over the hair surface, thereby preventing the finish from becoming sticky. A particularly preferred range of component C is 0.5 to 5% by weight. In addition to the above-mentioned essential ingredients, the hair cosmetic composition of the present invention may contain various additives such as antibacterial agents, perfumes, pigments, etc. depending on the purpose of use. The structure and effects of the present invention will be better understood by the following examples. The outline of the test method adopted in the examples is as follows. (1) Straightening effect Soak 5g of a 20cm hair bundle in water for 5 minutes, wrap it around a 3cm diameter net collar, dry at 75±5℃ for 2 hours, and apply 0.5g of the sample to the curled hair. The curls are then combed and the degree of straightness of the curls is judged based on the following criteria. ◎: The degree of curl straightening is very good. 〇: 〃 Pretty good. △: 〃 Slightly bad. ×： 〃 Bad. (2) Hair styling effect Apply 0.25 g of sample to 2.5 g of a 10 cm hair bundle, blow air from above, and judge the degree of cohesion of the hair according to the following criteria. ◎: Very good hair styling ability. 〇: 〃 Pretty good. △: 〃 Slightly bad. ×： 〃 Bad. (3) Finishing properties Apply 0.5g of the sample to 5g of a 20cm hair bundle, and evaluate the finish of the hair by sensory evaluation for stickiness, stiffness, and weight using the following criteria. ◎: Very good finish. 〇: 〃 Pretty good. △: 〃 Slightly bad. ×: Poor finish. (4) Drying property Apply 0.5g of sample to 5g of 20cm hair bundle,
The dryness of the hair is determined based on the following criteria at ℃ and 65% relative humidity. ◎: Very easy to dry. ○: Quite easy to dry. △: Slightly difficult to dry. ×: Difficult to dry. (5) Liquidity Visually judge the condition of the sample at 25℃ using the following criteria. ◎: Uniformly transparent 〇: Slightly cloudy △: White turbid ×: Separation example 1 Six types of hair cosmetics (Test Nos. 1 to 6) were prepared based on the formulation shown in Table 1 below, and their performance was evaluated. Tested. As shown in Table 1, in Test Nos. 1, 2, and 6, the mixing ratio of water and ethyl alcohol was outside the range of 90/10 to 50/50, so the effects of the present invention could not be obtained.

【table】

[Table] Example 2 Based on the composition shown in Table 2 below, 5 types (Test No.
Hair cosmetics 7 to 11) were prepared and their performance was tested. As is clear from Table 2, the mixing ratio of phosphate ester-1 (polypropylene glycol phosphate ester salt) and phosphate ester-2 (polyoxypropylene alkyl ether phosphate ester salt) constituting component B is 10/90. Tests Nos. 7 and 11, which are outside the range of ~90/10, cannot obtain the effects of the present invention, but the remaining tests Nos. 8, 9, and 10 have a mixing ratio of 10/90 to 90/10. Since it is within the range, all product performances aimed at by the present invention can be satisfied.

【table】

[Table] Example 3 Purified water 45% by weight, ethyl alcohol 30% by weight,
R defining the molecular structure of component 3 in a composition consisting of 20% by weight of component B (same as component B of Example 1) and 5% by weight of polyoxyethylene methylpolysiloxane (component C) represented by the above formula. ,
Twelve hair cosmetics (Test Nos. 12 to 23) as shown in Table 3 below were prepared by varying the values of P, x, m, and n, and their performance was tested. As shown in Table 3, the compositions of Test Nos. 12 to 23 all contain component C within the scope of the present invention, and therefore can satisfy the desired performance.

[Table] Example 4 Twenty-six types of hair cosmetics (Test Nos. 24 to 36) were prepared based on the formulation shown in Table 4 below, and their performance was tested. In Table 4, component A is a solvent with a weight mixing ratio of purified water and ethanol of 60/40,
Component B and Component C are respectively Component B of Example 1.
and component C. As is clear from Table 4, the effects of the present invention cannot be obtained in Test Nos. 24 to 30 in which the composition ratios of components A, B, and C are outside the scope of the present invention, but the composition range is within the scope of the present invention. Sample No. 31 in
~36 satisfies the target performance.

[Table] Example 5 A hair cosmetic having the following composition was prepared. ●Polyoxypropylene sorbitol ether phosphate (=30) 10% by weight ●Polyoxypropylene stearyl ether phosphate (=20) 10% by weight ●Polyoxyethylene methyl polysiloxane (
=10) 1% by weight ●Ethanol 35% by weight ●Water 44% by weight When the performance of the hair cosmetic of the above example was tested, the following results were obtained. Straightening effect ◎ Hair styling effect ◎ Finishing properties ◎ Drying properties ◎ Liquid properties ◎

[Brief explanation of the drawing]

The drawing is a triangular coordinate system showing the range of compounding ratios of the hair cosmetic components A, B, and C of the present invention.

Claims (1)

[Claims] 1. The mixing ratio of water and ethanol is from 90/10 by weight.
40% by weight or more of a solvent (referred to as component A) that is 50/50; a mixing ratio of phosphate ester salt of polyoxypropylene polyhydric alcohol ether and phosphate ester salt of polyoxypropylene alkyl ether is 10 by weight; /90 to 90/10 (referred to as component B) at 5 to 50% by weight; general formula (In the formula, P is a number from 1 to 5, R is hydrogen or a methyl group, x is a number from 1 to 20, m is a number from 3 to 50, and n
represents a number from 5 to 50, respectively. ) polyoxyalkylenemethylpolysiloxane (component C
) containing 0.1 to 10% by weight, and the blending ratio of each of the above components A, B, and C is the triangular coordinate point W [(A)94.9:(B)5:(C)0.1] [(A)49.9: (B)50: (C)0.1] X [(A)40: (B)50: (C)10] Z [(A)85: (B)5: (C)10] A hair cosmetic characterized by being within the range surrounded by.