JP4978140B2 - Transparent gel composition - Google Patents

Description

  The present invention relates to a transparent gel composition containing N-long chain acylamino acid and / or a salt thereof, a cationic surfactant, and water, and a hair cosmetic comprising the same.

  Conventionally, hair cosmetics such as rinses, conditioners and treatments have been used for the purpose of imparting conditioning effects such as imparting flexibility and gloss to the washed hair and further protecting the hair. For these hair cosmetics, a composition having an opaque gel composed of a cationic surfactant and a higher alcohol as a basic skeleton is usually used. However, since it is not suitable when transparency is required, a combination of a cationic surfactant, a specific nonionic surfactant, an oil component, a polyhydric alcohol, etc. has been reported as a transparent hair rinse agent. (Patent Documents 1 to 4). However, it was not yet satisfactory from the viewpoint of obtaining sufficient conditioning.

  On the other hand, N-long chain acylamino acids and / or salts thereof are known to have excellent conditioning properties. However, there are reports of hair cosmetic compositions containing an N-acyl acidic amino acid and a cationic surfactant (Patent Document 5) and hair cosmetic compositions containing an organic amine compound and an N-acyl amino acid compound (Patent Document 6). Although there were all, it was opaque hair cosmetics.

A transparent gel composition using an N-long chain acylamino acid and / or a salt thereof, and a hair cosmetic material having conditioning properties containing them has been highly desired.
JP 2002-53441 A JP 2002-53442 A Japanese Patent Laid-Open No. 2002-53443 JP 2002-234824 A JP 59-181206 A JP 2005-179197 A

  An object of the present invention is to provide a transparent gel composition having N-long-chain acyl acidic amino acid and / or a salt thereof and a cationic surfactant, which have conditioning properties.

  As a result of intensive studies to solve the above problems, the present inventors blend (A) an N-long chain acylamino acid and / or a salt thereof, (B) a cationic surfactant, and (C) water. As a result, it was found that the intended transparent gel-like composition was obtained, and the present invention was completed.

That is, the present invention includes the following aspects.
[1] A transparent gel composition comprising (A) an N-long chain acylamino acid and / or a salt thereof, (B) a cationic surfactant, and (C) water.
[2] The weight ratio of the component (A) to the component (B) is 45:55 to 78:22, and the component (A) is 5 to 40% by weight based on the total weight of the transparent gel composition. The transparent gel composition according to claim 1.
[3] The transparent gel composition according to any one of claims 1 to 2, wherein the amino acid of the component (A) is an acidic amino acid.
[4] The transparent gel composition according to any one of claims 1 to 3, wherein the amino acid of the component (A) is glutamic acid.
[5] The transparent gel composition according to any one of claims 1 to 4, wherein the cationic surfactant of the component (B) is a quaternary ammonium salt.

  It has become possible to obtain a transparent gel composition comprising N-long chain acyl acidic amino acid and / or a salt thereof having a conditioning property and a cationic surfactant as main components.

  In the present invention, “gel” means that the viscosity is 10,000 mPa · s or more.

  The N-long chain acylamino acid and / or salt thereof which is component (A) used in the present invention may be obtained by a known method. For example, the Schotten-Baumann reaction between an amino acid and a fatty acid halide is a widely known method.

  As the amino acid of component (A), glutamic acid, aspartic acid, glycine, alanine, threonine, methylalanine, sarcosine, lysine, arginine and the like can be used. These amino acids may be L-form, D-form or DL-form. One of these may be used, or two or more selected from the above group may be mixed and used. From the viewpoints of stability and feeling of use of the material after acylation, acidic amino acids and neutral amino acids are preferable, and acidic amino acids are more preferable. As specific compounds, glutamic acid, glycine, and alanine are more preferable, and glutamic acid is particularly preferable.

  As the acyl group of component (A), a linear or branched one derived from a saturated or unsaturated fatty acid having 8 to 22 carbon atoms can be used. For example, as the fatty acid, caprylic acid, capric acid, lauric acid, myristic acid, stearic acid, isostearic acid, palmitic acid, oleic acid, linoleic acid, behenic acid, coconut oil fatty acid, palm fatty acid, hardened beef tallow fatty acid, etc. It is done. One of these may be used, or two or more selected from the above group may be mixed and used. In particular, lauric acid, myristic acid, and coconut oil fatty acid are preferable from the viewpoint of obtaining a transparent gel-like composition having excellent conditioning properties.

  The salt of the component (A) is not particularly limited, and examples thereof include alkali metals such as sodium and potassium, alkaline earth metals such as calcium and magnesium, inorganic salts such as aluminum and zinc, ammonia, monoethanolamine, diethanolamine, Examples include organic amines such as triethanolamine, and organic salts such as basic amino acids such as arginine and lysine. One of these may be used, or two or more selected from the above group may be mixed and used. From the viewpoint of easy availability and handling, alkali metal salts, organic amine salts, and basic amino acids are preferable, and sodium, potassium, triethanolamine, and arginine are particularly preferable.

  As a neutralization equivalent of a component (A), 0.8-2.0 are used normally. If the neutralization equivalent is lower than 0.8, precipitation tends to occur, and if the neutralization equivalent is higher than 2.0, there is a problem that liquefaction tends to occur. From the viewpoint of obtaining a transparent gel composition, 0.8 to 2.0 is preferable, and 1.0 to 2.0 is more preferable.

  The cationic surfactant of component (B) is not particularly limited, but lauryltrimethylammonium chloride, lauroyltrimethylammonium bromide, myristyltrimethylammonium chloride, myristyltrimethylammonium bromide, palmityltrimethylammonium chloride, palmityltrimethylammonium bromide, Monoalkyl quaternary amines such as oleyltrimethylammonium chloride, oleyltrimethylammonium bromide, cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, eicosyltrimethylammonium chloride, eicosyltrimethylammonium bromide, behenyltrimethylammonium chloride, behenyltrimethylammonium bromide Hydroxyalkyl groups such as nium salts or dialkyl quaternary ammonium salts such as dipalmityldimethylammonium chloride and sometimes palmityldimethylammonium bromide, distearyl polyethenoxymethylammonium chloride, tristearyl polyethenoxyammonium bromide Surfactants, and amidoamine type cationic surfactants such as dimethylaminopropylaminopropylamide stearate and distearamidpropylmethylamine, Nα-cocoyl-L-arginine ethyl ester / DL-pyrrolidone carboxylate And cationic surfactants such as Nα-cocoyl-L-arginine methyl ester and glutamate. From the viewpoint of obtaining a stable transparent gel composition, quaternary ammonium salts are preferable, and cetyltrimethylammonium bromide and cetyltrimethylammonium chloride are particularly preferable.

  The water which is the component (C) used in the present invention is not particularly limited as long as it is of a purity that is generally used for cleaning agents and cosmetics. Specifically, ion exchange water, well water, natural water, ground water, city water, hard water, soft water, and the like can be used. One of these may be used, or two or more selected from the above group may be mixed and used. Ion exchange water is preferred from the viewpoint of storage stability and hygiene of the product of the present invention.

    The weight ratio of the component (A) and the component (B) used in the present invention is usually 45:55 to 78:22. When the component (B) is less than 22, the conditioning effect is weak, and when the component (B) is more than 55, problems such as precipitation are likely to occur. From the viewpoint of obtaining a transparent gel composition, 45:55 to 78:22 is preferable, and 50:50 to 75:25 is more preferable.

  The component (A) used in the present invention is usually used in an amount of 5 to 40% by weight based on the total weight of the transparent gel composition. When the component (A) is less than 5% by weight, it is difficult to obtain a gel composition, and when it is more than 40% by weight, the composition may become opaque. From the viewpoint of obtaining a transparent gel composition, the component (A) is preferably 5 to 40% by weight, more preferably 8 to 40% by weight, and more preferably 10 to 35% by weight based on the total weight of the transparent gel composition. Particularly preferred.

  The method for producing a transparent gel composition in the present invention comprises mixing a predetermined proportion of component (A), component (B) and component (C), and heating and dissolving in a range of 60 to 80 ° C. to obtain a uniform solution. . Then, it cools to room temperature and a transparent gel-like composition is obtained.

In the transparent gel composition of the present invention, various optional components used in normal cosmetics, quasi-drugs and the like in addition to the above-described essential components can be appropriately blended to such an extent that the effects of the present invention are not impaired. . Specifically, oil agents (camellia oil, corn oil, olive oil, rapeseed oil, coconut oil, palm oil, hydrogenated castor oil, beeswax, liquid lanolin, liquid paraffin, squalene, petrolatum, linear polysiloxane such as dimethylpolysiloxane, Cyclic polysiloxanes such as octamethylcyclotetrasiloxane, amino-modified silicone oil, etc.), surfactants (alkyl sulfates and alkyl ether sulfates, fatty acid salts, sulfosuccinates, α-olefin sulfonates, N-acylmethyls) Ionic surfactants such as taurine salts, alkyl ether carboxylates, phosphate ester salts, imidazoline-based amphoteric surfactants, betaine-based amphoteric surfactants, non-ionic surfactants such as alkylpolyglucosides), thickening Agent (guar gum, starch, ethyl cellulose, methyl) Hydroxypropyl starch, carboxymethylcellulose, carboxyvinyl polymer, bentonite, hectorite, etc.), polyhydric alcohol, chelating agent, preservative, fragrance, UV absorber, moisturizer, amino acid, physiologically active ingredient, It is a component such as an antioxidant, a pearling agent, an anti-inflammatory agent, an antibacterial agent, an antiperspirant, a neutralizing agent, a pH adjuster, and the like, and can be blended according to the specific use and form of the cosmetic.

  The transparent gel composition of the present invention can be used as a high-value-added cosmetic material that has good transparency and exhibits a viscosity of at least 10,000 mPa · s. In view of maintaining transparency and shape stability, the lower limit of viscosity is preferably 20000, more preferably 30000, and still more preferably 500000. In view of difficulty in handling in production, the upper limit of viscosity is preferably 300,000, more preferably 250,000, and further preferably 200,000.

  The “transparent gel composition” in the present invention is a composition composed of only the components (A) to (C) in the narrow sense, while the components (A) to (( In addition to the essential component (C), it is a composition containing components that are contained to such an extent that the effects of the present invention are not impaired. In the latter case, it corresponds to a commercially available “cosmetic material”. Although the use form is not specifically limited, Specifically, use as hair washing agents, such as a hair conditioner, is preferable. However, even if the composition is slightly different from the region of the present invention, what shows the properties of the transparent gel composition can be regarded as the scope of the present invention.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited by the following Example.

Examples 1 to 13 and Comparative Examples 1 to 7:
Transparent gel-like compositions (Examples 1 to 7) composed of the composition described in Table 1 below, Transparent gel-like compositions (Examples 8 to 13) composed of the composition described in Table 2, Table 3 Comparative Examples 1-7 are shown.

(Measurement method of viscosity of transparent gel composition)
The prepared transparent gel composition was measured at room temperature using a stress control type rheometer AR-G2 (TA Instruments). The viscosity at a shear rate of 0.1 s-1 was determined using a 4 cm, 2 ° cone plate.

(Evaluation of appearance of transparent gel composition)
The appearance of the prepared transparent gel-like composition was visually observed and judged by either transparent or opaque.

(Evaluation of feeling of use of transparent gel composition)
The sense of use of the obtained transparent gel composition on the hair after washing was subjected to sensory evaluation by three specialized panelists and evaluated based on the following evaluation criteria. That is, about 2 g of hair bundle previously washed with 10% by weight aqueous solution of sodium laureth sulfate, and when the transparent gel composition is applied to the washed hair, the ease of application and the conditioning property at the time of rinsing Each was evaluated. The average value of the three evaluation points was calculated, 0 or more and less than 1 point was evaluated as x, 1 or more and less than 2 points was evaluated as Δ, 2 or more and less than 3 points as ◯, and 3 or more and 4 points or less as ◎.
0 points: Very bad 1 point: Somewhat bad 2 points: Normal 3 points: Somewhat good 4 points: Very good

  As is apparent from the results of Tables 1 and 2, a transparent gel containing component (A) N-long chain acylamino acid and / or salt thereof, component (B) cationic surfactant, and (C) water A composition was obtained. They showed excellent hair feel.

   As is clear from the results in Table 3, in Comparative Examples 1 to 7, sufficient viscosity was not obtained and the gel was not formed. In addition, usability was low.

Formulation Example 1
Tables 4 and 5 below show formulation examples of a transparent hair conditioner in which the transparent gel composition is blended. In any case, a transparent hair condition having a good feeling of use was obtained.

  Conditioning to hair It has become possible to stably provide transparent gel compositions and cosmetics mainly composed of N-long chain acylamino acids and / or salts thereof and cationic surfactants.

Claims (3)

(A) N-long-chain acyl acidic amino acid and / or salt thereof, (B) a cationic surfactant, (C) water, and a transparent gel composition characterized by comprising (A) component And (B) the weight ratio of 45: 55-78: 22, and (A) component is 5 to 40 weight% with respect to the composition total weight, The hair conditioner characterized by the above-mentioned. The hair conditioner according to claim 1, wherein the amino acid of the component (A) is glutamic acid. The hair conditioner according to any one of claims 1 to 2 , wherein the cationic surfactant of the component (B) is a quaternary ammonium salt.