JP4601057B2 - Non-aqueous hair treatment agent - Google Patents

Description

  The present invention relates to a non-aqueous hair treatment agent, and more particularly, imparts a moist feeling, flexibility and uniform feel to hair damaged by chemical treatment such as straightening treatment. The present invention relates to a non-aqueous hair treatment agent that can be used.

  Recently, the lipids on the cuticle surface of hair have been lost due to repeated chemical treatments such as hair dyeing treatment, permanent wave treatment, hair straightening treatment, etc., and furthermore, daily care such as shampoo and blow is added to the cuticle. As a result, the hair inside the hair flows out and the hair becomes shiny (glossy) and slipping (slip), and the hair is damaged and damaged (damage). It has become easier to receive. Therefore, various non-aqueous hair treatment agents have been proposed for the purpose of repairing hair damaged by chemical treatment (Patent Documents 1 to 3).

However, since these non-aqueous hair treatment agents are mainly composed of oily components such as natural animal and vegetable oils and fats, there is a problem of giving the hair stickiness. In addition, although the damage to the hair becomes stronger as it goes to the tip of the hair, the conventional non-aqueous hair treatment agent reduces the amount of oily components absorbed because the damaged tip of the hair is hydrophilic. There is a problem in that a large amount of oily component is adsorbed to a small number of root parts, and the degree of repair of the hair tip part is less than that of the root part, and thus a uniform feel cannot be obtained on the hair.
Japanese Patent Laid-Open No. 01-272513 JP-T-2004-501112 JP 2005-2037 A

  The present invention solves the problems of the conventional non-aqueous hair treatment agent as described above, is damaged by chemical treatment such as curly hair straightening treatment, and the degree of damage is different between the hair tip portion and the root portion. An object of the present invention is to provide a non-aqueous hair treatment agent capable of imparting moist feeling, flexibility and uniform feel to hair.

  As a result of intensive research to solve the above problems, the present inventor has found that when the non-aqueous hair treatment agent is constituted by containing dimethiconol, amino-modified silicone, cyclic silicone and liquid paraffin, the above problems can be solved. The headline and the present invention were completed.

  The non-aqueous hair treatment agent of the present invention is damaged by chemical treatment such as curly hair straightening treatment, etc., even for hair having a different degree of damage between the hair tip portion and the root portion, moist feeling, flexibility and A uniform feel can be imparted. The above-mentioned uniform feel means having the same slipping feeling over the entire hair (that is, from the root portion to the tip portion of the hair). According to the non-aqueous hair treatment agent of the present invention, Even hair that has a different degree of damage from the root part can be given a moist feeling and flexibility, and can be given a uniform feel. It becomes like this.

  As described above, the non-aqueous hair treatment agent of the present invention includes dimethiconol, amino-modified silicone, cyclic silicone, and liquid paraffin. The essential components thereof will be described as follows.

  The dimethiconol used in the present invention is a dimethylpolysiloxane having a hydroxyl group bonded to the terminal. In the present invention, this dimethiconol is considered to contribute mainly to imparting a moist feeling to the hair.

  In this invention, as content in the non-aqueous hair treatment agent of this dimethiconol, 1.5-4.5 mass% is preferable, and 1.9-4 mass% is especially preferable. When the dimethiconol content is less than the above range, the hair cannot be sufficiently moistened, and when the dimethiconol content is more than the above range, the hair may be sticky.

  Examples of commercially available dimethiconol include X-21-5619 (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.). In addition, 1501 Fluid (trade name, manufactured by Toray Dow Corning Silicone Co., Ltd., containing 15% by mass of dimethiconol and 85% by mass of decamethylcyclopentasiloxane) is commercially available as a premix raw material containing this dimethiconol.

  In the present invention, various amino-modified silicones can be used. Particularly, highly polymerized dimethylsiloxane / methyl (aminopropyl) siloxane copolymer, aminoethylaminopropylmethylsiloxane / dimethylsiloxane copolymer, aminoethylamino A propylsiloxane / dimethylsiloxane copolymer or the like is preferable, and in the present invention, this amino-modified silicone is considered to mainly contribute to imparting flexibility to hair.

  Commercially available products of the above highly polymerized dimethylsiloxane methyl (aminopropyl) siloxane copolymer include, for example, KF-8020 [trade name, manufactured by Shin-Etsu Chemical Co., Ltd., highly polymerized dimethylsiloxane methyl (aminopropyl) as a premix raw material. ) 20% by mass of siloxane copolymer and 80% by mass of methylpolysiloxane], KF-8017 [trade name, manufactured by Shin-Etsu Chemical Co., Ltd., 10% by mass of highly polymerized dimethylsiloxane / methyl (aminopropyl) siloxane copolymer and methyl Polysiloxane containing 90% by mass], and examples of commercially available aminoethylaminopropylmethylsiloxane / dimethylsiloxane copolymers include KF-880 (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.), SM8452C (trade name, Toray Dow Corning), XF-42-C0330 ( Name, GE Toshiba Silicone Co., Ltd.) include, as commercial products of aminoethyl aminopropyl siloxane-dimethyl siloxane copolymer, for example, SF8704C (trade name, manufactured by Dow Corning Toray Silicone Co., Ltd.).

  And in this invention, as content in the non-aqueous hair treatment agent of this amino modified silicone, 0.4-2 mass% is preferable, and 0.6-1.6 mass% is especially preferable. When the content of the amino-modified silicone is less than the above range, sufficient flexibility cannot be imparted to the hair, and when the content of the amino-modified silicone is more than the above range, the amount attached to the hair increases. In contrast, when the hair is sticky or contains an appropriate amount, the hair may become hard.

  In the present invention, various cyclic silicones can be used, and decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, dodecamethylcyclohexasiloxane and the like are particularly preferable. In the present invention, the cyclic silicone mainly dissolves the dimethiconol and amino-modified silicone without impairing their properties, and also volatilizes itself, thereby reducing stickiness to fingers during application. It has the action.

  Commercially available products of the decamethylcyclopentasiloxane include, for example, TSF405 (trade name, manufactured by GE Toshiba Silicone), SH245, DC345 (both are trade names, manufactured by Toray Dow Corning Silicone), and octamethyl. Examples of commercially available products of cyclotetrasiloxane include SH244 and SH344 (both trade names, manufactured by Toray Dow Corning Silicone Co., Ltd.). Examples of commercially available products of dodecamethylcyclohexasiloxane include DC246 (trade name, Toray Industries, Inc.). -Dow Corning Silicone). In addition, there are commercially available premix raw materials containing this cyclic silicone, and examples of such premix raw materials containing cyclic silicone include, for example, the aforementioned 1501 FLUID (trade name, manufactured by Toray Dow Corning Silicone, 85% by mass of decamethylcyclopentasiloxane and 15% by mass of dimethiconol).

  And in this invention, it is preferable that it is 80.5-98.09 mass% as content in this non-aqueous hair treatment agent of cyclic silicone, and it is especially preferable that it is 93-97 mass%. When the content of cyclic silicone is less than the above range, dimethiconol and amino-modified silicone cannot be sufficiently dissolved, and when the content of cyclic silicone is more than the above range, due to the reduction of other components accompanying it, It may be difficult to impart moist feeling, flexibility, and uniform feel to the hair, and fingers may become whitish.

  In the present invention, liquid paraffin imparts a uniform feel to hair with different degrees of damage between the tip portion and the root portion (usually the tip portion is more damaged than the root portion). It contributes to doing. In addition, the presence of this liquid paraffin makes it possible to exert the moist feeling of dimethiconol so that it is finished in a uniform state with respect to hair having different degrees of damage between the hair tip portion and the root portion. In other words, dimethiconol is excellent in adsorptivity to the hair and skin-forming ability, and is blended in hair cosmetics. However, according to the present invention, due to the presence of the liquid paraffin, the moist feeling imparted by dimethiconol is also exerted so as to be finished in a uniform state as a whole. It becomes like this.

  In the present invention, the content of the liquid paraffin in the non-aqueous hair treatment agent is preferably 0.01 to 3% by mass, particularly preferably 0.2 to 1% by mass. When the content of the liquid paraffin is less than the above range, sufficient uniformity cannot be obtained, and when the content of the liquid paraffin is more than the above range, the hair may be sticky.

  Although the present invention relates to a non-aqueous hair treatment agent, the non-aqueous system means that water is not intentionally blended, and is not required to be completely non-aqueous, and substantially Any non-aqueous system may be used.

  The non-aqueous hair treatment agent of the present invention comprises only the above four essential components, that is, dimethiconol, amino-modified silicone, cyclic silicone and liquid paraffin, and can be formed into a liquid at room temperature (25 ° C.), and is substantially transparent. Although it can be configured as a non-aqueous hair treatment agent, silicones other than the above essential silicones (that is, dimethiconol, amino-modified silicone and cyclic silicone), and hydrocarbons other than liquid paraffin, as long as the effect is not impaired In addition to the above, other components usually blended in non-aqueous hair treatment agents, such as higher alcohols and other alcohols, esters, fatty acids, fats and oils, waxes, alkyl glyceryl ethers, etc. Can be made.

  Examples of silicones other than the above essential components include, for example, methylpolysiloxane, highly polymerized methylpolysiloxane, methylhydrogenpolysiloxane, polyoxyethylene / methylpolysiloxane copolymer, methylphenylpolysiloxane, trimethylsiloxysilicate, and crosslinking Examples thereof include siloxanes having a phenyl group having a high refractive index, such as type methylpolysiloxane, alkyl-modified silicone, and phenylpropyldimethylsiloxysilicic acid.

  Examples of hydrocarbons other than liquid paraffin include hydrocarbons that are liquid at room temperature, such as α-olefin oligomers and squalane, with squalane being particularly preferred.

  Examples of the higher alcohol include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, behenyl alcohol, and 2-octyldodecanol. From the viewpoint of improving moisture retention, oleyl is particularly preferred. Alcohol is preferred.

  Examples of alcohols other than higher alcohols include lower alcohols such as methyl alcohol, ethyl alcohol, propyl alcohol, and butyl alcohol, cholesterol, and phytosterol.

  Examples of the esters include ethyl oleate, isopropyl myristate, isopropyl palmitate, butyl stearate, cetyl palmitate, myristyl myristate, octyldodecyl myristate, octyldodecyl oleate, PPG-3 myristate (polypropylene glycol) Benzyl, medium chain fatty acid triglyceride, isopropyl isostearate, ethyl isostearate, cetyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, isocetyl isostearate, octyldodecyl dimethyloctanoate, dioctyl succinate, N-lauroyl-L-glutamic acid Di (cholesteryl octyldodecyl), trioctyldodecyl citrate, diisostearyl malate, myristyl lactate, cetyl lactate, iso lactate Teariru, lactic oleyl, although such octyldodecyl lactate are exemplified, from the viewpoint of improving the moisture retention, particularly isostearyl lactate are preferred.

  Examples of fatty acids include linear or branched saturated or unsaturated linear or branched fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, isostearic acid, 12-hydroxystearic acid, and coconut oil fatty acid. And higher fatty acids.

  Examples of the alkyl glyceryl ether include monostearyl glyceryl ether, monocetyl glyceryl ether, monooleyl glyceryl ether, and isostearyl glyceryl ether.

  In addition to the components exemplified above, polymer compounds such as polyhydric alcohols, saccharides and cationic polymer compounds, surfactants, powders, coloring materials, animal and plant extracts, amino acids, peptides, vitamins, UV absorbers Cosmetic ingredients that are usually blended in non-aqueous hair treatment agents such as preservatives, antioxidants, chelating agents, and fragrances can be appropriately contained.

  However, these optional components, that is, components other than dimethiconol, amino-modified silicone, cyclic silicone, and liquid paraffin are preferably 10% by mass or less in the non-aqueous hair treatment agent of the present invention. More preferably, it is more preferably 1% by mass or less.

  Next, the present invention will be described more specifically with reference to examples. However, this invention is not limited only to those Examples. In the following examples and the like, the content (blending amount) of each component is shown in% so that the total amount of the non-aqueous hair treatment agent is 100% by mass. In the table, the display of% is omitted, and only the numerical value indicating the blending amount is displayed.

Examples 1-7 and Comparative Examples 1-4
A non-aqueous hair treatment agent was prepared with the composition shown in Table 1, and the obtained non-aqueous hair treatment agent was evaluated with respect to moist feeling, flexibility and uniform feel. The results are shown in Table 2.

  As the amino-modified silicone, a highly polymerized dimethylsiloxane / methyl (aminopropyl) siloxane copolymer and an aminoethylaminopropylmethylsiloxane / dimethylsiloxane copolymer were used, and decamethylcyclopentasiloxane was used as the cyclic silicone. . And in the said non-aqueous hair treatment agent, although the compounding component uses a solution form or a dispersion liquid thing, the compounding quantity shown in Table 1 is a compounding quantity as a pure part. Since two types of amino-modified silicones are used, Table 1 shows the total amount of amino-modified silicone and the amount of highly polymerized dimethylpolysiloxane / methyl (aminopropyl) siloxane copolymer. The modified silicone A is shown in parentheses, and the compounding amount of aminoethylaminopropylmethylsiloxane / dimethylsiloxane copolymer is shown as amino-modified silicone B in parentheses. Dimethiconol and highly polymerized dimethylsiloxane / methyl (aminopropyl) siloxane copolymer use premix raw materials. The trade names of these premix raw materials and the trade names of other ingredients are listed below Table 1. Show.

  In the evaluation of moist feeling, flexibility and uniform feel, the hair was subjected to bleaching treatment and curly hair straightening treatment as shown below to damage the hair. In addition, in the hair damaged by such a process, the hair tip part receives more damage than a root part.

Hair bleaching and straightening treatment:
First, the bleaching agent for bleaching hair is composed of 17.14% of 35% hydrogen peroxide solution and 100% of purified water, and 9.92% of 25% ammonia water. The total amount was adjusted to 100% and mixed at a mass ratio of 2: 1.

  The first agent for straightening hair is 9.0% thioglycolic acid, adjusted to pH 9.3 with potassium hydroxide and monoethanolamine solution, and 100% with purified water. As the second agent, a solution containing 9.5% sodium bromate and making the total amount 100% with purified water was prepared.

  The bleaching treatment was performed by immersing a hair bundle of 24 cm in length and 2 g in mass collected from curly hair in 100 ml of the bleaching agent at room temperature for 30 minutes, and then washed with purified water and dried. This bleaching process was repeated twice. Thereafter, 2 g each of the above-mentioned first hair straightening agent was applied to the whole and left straight at room temperature for 20 minutes, then washed with water, and some moisture remained in the dryer. Dried to a state. Thereafter, the hair is pressed for about 3 seconds with a high-temperature hair-styling iron whose surface temperature is set to 180 ° C. (the pressing with this high-temperature hair-styling iron is performed while shifting the hair from the root portion to the hair tip portion). The straightening by was repeated 3 times. Then, 2 g of the second hair straightening agent was applied to each hair bundle, left at room temperature for 15 minutes, washed with water, and naturally dried for 24 hours to complete the hair straightening treatment.

  Next, 0.1 g of each of the non-aqueous hair treatment agents of Examples 1 to 7 and Comparative Examples 1 to 4 is applied to the hair damaged by the bleaching treatment and the subsequent curly hair straightening treatment as described above. The hair was applied one by one and the hair after application was evaluated for moist feeling, flexibility and uniform feel. However, moist feeling and flexibility were performed only by sensory evaluation, and uniform feel was performed by sensory evaluation and measurement of average dynamic friction coefficient (MIU). In sensory evaluation, it was difficult to evaluate moist feeling and flexibility separately, so they were evaluated together. The sensory evaluation method of “moist feeling and flexibility”, the sensory evaluation method of “uniform feel”, and the measurement method of the average dynamic friction coefficient are as shown below.

Sensory evaluation of “moistness and flexibility”:
As described above, the hair after applying the non-aqueous hair treatment agents of Examples 1 to 7 and Comparative Examples 1 to 4 was subjected to sensory evaluation of “moist feeling and flexibility” by 20 panelists, and the evaluation results were obtained. The scores were scored according to the following evaluation criteria, and the scores based on the evaluation results of the 20 panelists were summed up.

Evaluation criteria:
5 points: very good 4 points: good 3 points: normal 2 points: bad 1 point: very bad

◎: Total score is 80 points or more ○: Total score is 60 points or more and less than 80 points △: Total score is 40 points or more and less than 60 points ×: Total score is 20 points or more and less than 40 points

Sensory evaluation of “uniform feel”:
Each of the 20 panelists scored 1 point when they felt a uniform feel, and scored 0 points when they felt a non-uniform feel, and a panelist assigned each non-aqueous hair treatment agent. The results were summed up, evaluated, and symbolized according to the following criteria. The results are shown in Table 2. In addition, (circle) is a pass line and (double-circle) has shown that the uniform feel is further superior to (circle).

◎: Total score is 16 points or more ○: Total score is 12 points or more and less than 16 points Δ: Total score is 8 points or more and less than 12 points ×: Total score is less than 8 points

Measuring method of mean dynamic friction coefficient (MIU):
About the hair after apply | coating the said non-aqueous hair treatment agent, the average dynamic friction coefficient (MIU) was measured using the friction feeling tester KES-SE-STP made from Kato Tech in 25 degreeC and the atmosphere of 50% of relative humidity.

  In the measurement, 10 non-aqueous hair treatment agents were collected as samples for measurement for each non-aqueous hair treatment agent, arranged on a slide glass at intervals of 1 mm, and cellophane tape. The one with both ends fixed was used. In addition, when collecting hair, the same thickness as possible was selected.

  For the measurement, silicon rubber was used as a friction element, a load of 50 g was applied, and the friction coefficient tester was moved from the root part of the hair toward the tip part of the hair at a speed of 1 mm / sec to measure the average dynamic friction coefficient. The results are shown in Table 2. In addition, it is considered that the smaller the average dynamic friction coefficient value, the better the slipperiness of the hair and the better the uniform feel of the hair.

  As shown in Table 2, each of the non-aqueous hair treatment agents of Examples 1 to 7 has a moist feeling and flexibility imparting action to the hair as compared with the non-aqueous hair treatment agents of Comparative Examples 1 to 4. The evaluation value is high, and the non-aqueous hair treatment agents of Examples 1 to 7 are compared with the hair treatment agents of Comparative Examples 1 to 4, and the evaluation results of sensory evaluation and the measurement of the average dynamic friction coefficient are high in terms of uniform feel. Both the results were excellent. That is, the non-aqueous hair treatment agents of Examples 1 to 7 are compared with the non-aqueous hair treatment agents of Comparative Examples 1 to 4, for the hair damaged by chemical treatment such as curly hair straightening treatment, It was clear that a sufficient moist feeling and flexibility could be imparted and that a uniform feel could be imparted to the hair.

Claims (1)

A non-aqueous hair treatment agent containing dimethiconol , amino-modified silicone, cyclic silicone and liquid paraffin, wherein the content of dimethiconol is 1.5 to 4.5% by mass and the content of amino-modified silicone is 0.4. in to 2 mass%, at a content of cyclic silicones is from 80.5 to 98.09 wt%, a non-aqueous hair treatment you wherein the content of liquid paraffin is 0.01 to 3 wt%.