JPS627887B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a hair conditioner composition for protecting hair from various damages, improving the gloss of the hair, and giving it a moist and supple feel, and a hair conditioner suitable for brushing. The present invention aims to provide a composition. Generally, hair is damaged by chemical factors such as cold waves, hair bleaching, hair coloring, etc.
Damage occurs due to physical factors such as brushing that occurs on a daily basis. In particular, abrasion damage that is thought to be caused by brushing is observed in most women's hair, causing the epidermis of the hair to peel off and the cortex to be exposed, weakening the resistance of the hair and making it more likely to cause split ends and hair breakage. In addition, chemical treatments can also damage the hair, resulting in dull and dull hair. Since hair is biologically dead cells, once it is damaged, it cannot be restored to its original state. To prevent such damage, various hair cosmetics are commercially available, including pre-shampoo treatments, post-shampoo rinses, hair creams, and hair oils. However, the base materials of these products have high surface tension and viscosity, making the hair sticky, easy to stain, heavy and stiff after treatment. These products do not wet the hair evenly and have very poor lubricity, let alone shine. From this point of view, aerosol type hair treatment agents in which oil components (silicone, fatty acid ester, liquid paraffin, etc.) are dissolved in ethanol have recently been commercially available. For example, dimethylpolysiloxane is shown as a hair cosmetic in JP-A-52-47923.
This material has a surface tension lower than the critical surface tension of the hair, and spreads evenly over the hair surface, improving lubricity, but also maintaining the balance of moisture and suppleness of the hair, which are important factors for maintaining healthy hair. It lacks a moisturizing effect that imparts shine, and it is also unable to sufficiently prevent the electrostatic charge that occurs during brushing, making it unsuitable as a base material for preventing hair damage caused by brushing. In order to improve these drawbacks, there are cases where a base material with a moisturizing effect is used in combination, but due to the poor solubility and compatibility of dimethylpolysiloxane, the resulting base material does not exhibit a uniform liquid state, or The viscosity increases, and after finishing, it becomes heavy and sticky, which is not suitable. In addition, as an example of using a base material similar to polyoxyalkylene-modified organopolysiloxane,
There is No. 48-2776. This product is a W/O emulsion skin whose main components are a polyoxyalkylene-modified organopolysiloxane with a low content of polyoxyalkylene groups and water, with a particularly high water content of 50 to 85% by weight. It is a cosmetic. Therefore, it is not preferable to apply this product as a hair cosmetic because the finish is poor and unsuitable. Another example of using a base material similar to polyoxyalkylene-modified organopolysiloxane is JP-A-49-
There is No. 41547. This polyoxyalkylene-modified organopolysiloxane has a very high content of polyoxyalkylene groups, 75 to 85% by weight, and when used as a hair cosmetic, it has sufficient moisturizing effect but poor lubricity. In addition, it is unsuitable because it has extremely high hygroscopicity, resulting in a sticky or heavy finish. As a result of extensive research aimed at improving these drawbacks, the present invention has been developed to maintain hair in a beautiful and healthy state by using polyoxyalkylene-modified organopolysiloxane, which has low viscosity and low surface tension. This was based on the discovery that it has a lubricant that protects hair from wear and tear, a moisturizing effect that softens hair, and does not leave a heavy or sticky finish. That is, the present invention is characterized in that it consists of 1 to 30% by weight of polyoxyalkylene-modified organopolysiloxane having the following general formulas A, B, and C, and the balance being aqueous ethanol or anhydrous ethanol. General formula A: R or R′(CO _q H _2q ) _x O(CH ₂ ) _p − General formula B:

[expression] and/or General formula C: -SiR ₃ or However, in the above general formula, R is a methyl group or partially a phenyl group, R' is hydrogen or a _C1-5 alkyl group, p is a number of 1 to 5, q is 2 or 3, and x is the average number of oxyalkylene groups. , m, n are (-
SiR ₂ O) −, {−SiR [(CH ₂ ) _p O (C _q H _2q O) _x R′] O
-} represents the average number of units, and x, m, and n represent polyoxyalkylene groups of 15 to 60 for the copolymer.
% by weight and satisfies a viscosity of 5 to 100 centistokes (25°C). Therefore, it is important that the critical surface tension of the volatile residue of the composition of the present invention is 26.5 dyn/cm or less at 25°C, and if it is within the range of 26.5 dyn/cm or less, other oils may be added. There is no difference whatsoever. accordingly
It is not preferable to add other oils in an amount exceeding 26.5 dyn/cm. In general, beautiful and healthy hair is one in which the hair epidermis is complete and retains adequate moisture, and the hair is strained and
It has suppleness, luster, smoothness, etc.
To maintain this state, it is necessary to protect the hair from wear and tear caused by brushing, which is a major factor in hair damage. That is, 26.5 dyn/cm (25
°C) By applying oil with a lower surface tension to the hair, the oil wets the hair evenly, improving not only shine but also wettability, reducing friction caused by brushing and preventing wear and tear. I can do it. In addition, by providing a substance with a moisturizing effect that maintains the appropriate amount of moisture in the hair, it suppresses the generation of static electricity during brushing with both lubrication and moisturizing properties, and provides flexibility and supple hair. You can. Moreover, the finish must not be heavy, sticky, or stiff. That is, these base materials must have a low melting point, be in a uniform liquid state at room temperature, have a low viscosity, be highly stable, and be highly chemically safe. Specific examples of the present invention that satisfy all of the above items are as follows. (1) R ₃ SiO(−SiR ₂ O)− _o {−SiR[(CH ₂ ) _p O(C _q H _2q O) _x R′]O}− _n SiR ₃ (2) R′(OC _q H _2q ) _x O(CH ₂ ) _p (−SiR ₂ O) − _o {−SiR[(CH ₂ ) _p O(C _q H _2q O) _x R′]O} _n −SiR ₂ −(CH ₂ ) _p O(C _q H _2q O) _x R′ (3) R′(OC _q H _2q ) _x O(CH ₂ ) _p −SiR ₂ O−SiR ₂ (CH ₂ ) _p O−−(C _q H _2q O ) _x R' However, R is a methyl group, and a portion thereof may be substituted with a phenyl group. Also, R' is hydrogen or has 1 or more carbon atoms.
5 alkyl group, preferably hydrogen or methyl group. In addition, p must be a SiC bond for chemical stability, that is, a bond via an alkylene group that makes the organopolysiloxane block and polyoxyalkylene block stable, and is 1 to 5, particularly 3, n -Propylene group is preferred. Further, q is 2 to 3, preferably has a moisturizing effect, and is preferably a more hydrophilic ethylene group, that is, 2.
Also, x is the average number of oxyalkylene groups, n,
m is (SiR ₂ O), {SiR[(CH ₂ ) _p O(C _q HgO) _x
It is expressed as the average number of R′]O} units, and has a function that meets the purpose of the present invention, that is, has a surface tension of the critical surface tension of hair of 26.5 dyn/cm (25°C) or less, and has a moisturizing effect. In order to satisfy the function of having moderate hygroscopicity and not being sticky, which is a parameter of
It should contain a polymerization proportion of ~50% by weight and exhibit a satisfactory viscosity of 5 to 100 centistokes at 25°C. That is, if the proportion of polyoxyalkylene groups to the total weight of the polymer is small, the moisturizing effect will not be sufficient, and if it is too large, the surface tension will become high, making it unsuitable. Furthermore, if the viscosity is too low, the lubricity will be poor and unsuitable; if the viscosity is too high, the finish after hair treatment will be heavy and sticky, which is undesirable. The amount of the polyoxyalkylene-modified organopolysiloxane represented by the above general formula depends on the form of use, but is limited to 1 to 30% in the hair cosmetic composition, preferably 1 to 20%.
It is desirable that % is added. The reason for this is that the object of the present invention cannot be achieved with amounts other than those mentioned above. The polyoxyalkylene-modified organopolysiloxane used in the present invention can be produced by a known method. For example, in the polymer, p is 1 to 5, particularly 3 n-propylene groups (-
CH ₂ CH ₂ CH ₂ )− to obtain the bond,
Organopolysiloxanes having reactive Si-H groups have _the general formula _CH2 =CH- _CH2O ( _CqH2qO ) _x
It can be produced by reacting oxyalkylene polymers R' (in the formula, q, x, and R' are as shown above). However, the method for producing polyoxyalkyne-modified organopolysiloxane is not limited to the above method, and any suitable method may be used. In addition, in the present invention, the water/ethanol mixing ratio of water-containing ethanol for dissolving the polyoxyalkylene-modified organosiloxane is 20/80 to 20/80.
0/100 is preferable. The reason is that water accounts for 20%
Exceeding this is not preferred because the solubility of the polyoxyalkylene-modified organopolysiloxane deteriorates.
In addition, the hair becomes wet, which impairs curling and setting properties, which is also unfavorable in terms of drying properties. Note that the above problem will not occur if the percentage is less than 20%. The composition of the present invention is preferably applied uniformly to the entire hair, and it is advantageous to form the product into an aerosol or non-aerosol type pump spray to form the composition into spray particles as fine as possible. In particular, it is highly desirable to use an aerosol type spray. The propellants (propellant gas) used include halogenated hydrocarbons, so-called trichloromonofluoromethane, dichlorodifluoromethane, etc., LPG, dimethyl ether, carbon dioxide gas, etc. The amount of these propellants added depends on the composition. You can use 1/5 to 10 times the total amount. In carrying out the present invention, there is no problem in adding oils, polymers, fragrances, pigments, etc. as general-purpose base materials for cosmetics, as long as they have functions that do not deviate from the purpose of the present invention. Next, examples of the present invention will be described. Example 1 Three types of organopolysiloxanes as shown in Table 1 were used, and ethanol, fragrance, trichloromonofluoromethane and dichlorodifluoromethane as shown in Table 2 were blended with the organopolysiloxanes as shown in Table 3. An invention composition and a comparative example composition were obtained. In Table 3, No. 5-7, 9-12, 14,
15, 18, 19, 21 are products of the present invention, Nos. 1 to 4, 8, 13,
16, 17, 20, and 22 are comparative example products.

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【table】

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[Table] The test method for the performance shown in Table 3 was as follows. (1) Combability, gloss, and moist feeling. Sensory evaluation by practical test (by 20 testers) Evaluation criteria ++: Very good +: Good +-: Standard (commercially available silicone hair conditioner was used as standard) -: Slightly poor -: Poor (2) Non-stickiness Sensory evaluation by practical test (20 testers. Commercially available silicone hair conditioner was used as standard) Evaluation criteria 〇: No stickiness △: Slightly sticky (standard) ×: Sticky (3) Moisture retention test 2g of undamaged hair sample Kamoji used in split ends and cut hair generation test at 80℃ and 1mmHg.
After drying under reduced pressure for 5 hours, the moisture absorption amount was measured by the increase in weight before and after leaving it at 40% RH and 25°C for 3 hours, and the moisture retention under low humidity was determined. (4) Split ends and hair breakage test A sample hair conditioner composition (20 mg/1 g of hair) was applied under certain conditions to 2 g of damaged hair that had been washed with a commercially available shampoo, and the hair conditioner composition was applied at 65% RH25. Hair 100 after brushing 3000 times with a commercially available nylon brush at ℃
The number of split ends and cut hairs per hair was measured and evaluated. (5) Antistatic property test The sample Kamoji was brushed 10 times/20 seconds with a commercially available nylon brush at 40% RH and 25°C, and the spreading of the hair due to static electricity was observed and evaluated. Evaluation criteria 〇: Hair does not spread. Δ: Slightly spreading ×: Spreading As is clear from Table 3, the product made from the composition of the present invention was shown to have excellent performance as a hair conditioner. On the other hand, comparative example No. 1,
The dimethyl silicone used in No. 2 is often used in commercially available silicone hair conditioners, and although this was used as the standard, it had no antistatic effect and caused a large number of split ends and hair breakage. In addition, No. 3 and No. 4 with a low POE modification rate had no antistatic effect, and No. 8, No. 13, No. 16, and No. 20 had high viscosity and caused stickiness. It was undesirable. Furthermore, those with a high POE modification rate, such as No. 17 and No. 22, have high moisturizing properties but are undesirably sticky. Example 2 A water-containing non-aerosol type pump spray composition was formulated as shown in Table 4 to obtain a composition of the present invention. Table 4 Polyoxyalkylene-modified silicone (B shown in Table 1, polyoxyalkylene content 40
%, viscosity 50CS/25℃) 100 parts by weight Fragrance 0.1〃 Water 10.0〃 Ethanol 79.9〃 When the above composition was used as a hair conditioner, it was found to have excellent performance in the various properties shown in Table 3. Ta. Example 3 No. 5 as an aerosol type spray composition
A composition of the present invention was obtained by blending as shown in the table. Table 5 Polyoxyalkylene modified silicone B silicone shown in Table 1 (polyoxyalkylene content 15
%, viscosity 70CS/25°C) 6.0 parts by weight C silicon shown in Table 1 (polyoxyalkylene content 60%, viscosity 70CS/25°C) 4.0 Fragrance 0.1 Ethanol 89.9 Use the above composition as a hair conditioner It was found that it had excellent performance in various properties as shown in Table 3. As detailed above, the composition of the present invention is extremely useful as a hair conditioner composition, as it does not cause any abrasion damage to the hair during brushing and always gives the hair a moist feel and shine. It is.

Claims (1)

[Claims] 1 An oxyalkylene-modified organopolysiloxane having a content of polyoxyalkylene groups of 15 to 60% by weight and a viscosity of 5 to 100 centistokes at 25°C of 1 to 30% by weight, and the balance being aqueous ethanol or anhydrous ethanol. A hair conditioner composition characterized by: