JPH01211515A - Hair cosmetic - Google Patents

Abstract

PURPOSE:To obtain a hair cosmetic, containing a high-molecular weight silicone and antioxidant, capable of protecting the hair from ultraviolet rays and imparting smooth touch, having high transparency without impairing appearance of the hair, rich in water repellency and unwashable away with sweat, seawater, etc. CONSTITUTION:The aimed substance obtained by mixing one or two or more of high-molecular weight silicone expressed by the formula (R1 is methyl or partially phenyl; R2 is methyl or OH; n is 300-20000) and one or two or more of antioxidants with a normally used surfactant, water-soluble polyhydric alcohol, etc., according to a conventional method. In the hair cosmetic, 0.1-50wt.% high-molecular weight silicone (e.g., decamethylcyclopentasiloxane) is blended with 0.001-5wt.% antioxidant (e.g., butyl hydroxyanisole).

Description

[Detailed Description of the Invention] [Industrial Application Field 1] The present invention prevents hair damage caused by ultraviolet rays,
The present invention relates to a hair cosmetic that provides a smooth feel.

[Prior art] Cosmetics generally contain ultraviolet absorbers and titanium oxide in order to obtain an ultraviolet shielding effect.In particular, fine particle titanium oxide is blended to provide a sunburn prevention effect. There are also examples of this (Japanese Patent Publications No. 47-42502, No. 61-229809, No. 62-84017).

Cosmetics containing fine particle titanium oxide that has been surface-treated with metal soap have also been proposed (Japanese Patent Laid-Open No. 58-49307).
, Japanese Patent Publication No. 59-172415). These fine particulate titanium oxides have many problems in use because they are difficult to disperse as large particles, have a reduced ultraviolet shielding function, and tend to become cloudy. In general, when used on the hair, the hair becomes white and powdery, and cannot withstand practical use.

In addition, regarding the UV shielding effect, UV absorbers and fine particulate titanium oxide that adhere to hair are washed away by sweat, seawater, pool water, etc., and no lasting effect was observed in actual use. .

[Problems to be Solved by the Invention] As a result of extensive research in order to eliminate these drawbacks, the present inventors have found that by using an antioxidant in combination with high molecular weight silicone, hair can be effectively protected from ultraviolet rays. They have discovered that it is possible to obtain a hair cosmetic that is highly transparent, does not impair the appearance of the hair, is highly water repellent, is not washed away by sweat, seawater, etc., and has excellent usability, and has completed the present invention. reached.

[Means for Solving the Problems] That is, the present invention is characterized by containing one or more types of high molecular weight silicones represented by the following general formula [I] and one or more types of antioxidants. The present invention provides a hair cosmetic composition.

(R1 represents a methyl group or a part of phenyl group, R2
represents a methyl group or a hydroxyl group. Also, n[yo3,00
Represents an integer from 0 to 20,000. ) Hereinafter, the configuration of the present invention will be explained.

The high molecular weight silicone used in the present invention is represented by the above general formula [I], and the value of n in the formula is 3,000.
20,000 and exhibits soft rubber-like properties at room temperature. Specific examples include dimethylpolysiloxane, methylphenylpolysiloxane, dimethylpolysiloxane containing a terminal hydroxyl group, and methylphenylpolysiloxane containing a terminal hydroxyl group.

The amount of high molecular weight silicone used in the present invention is 0.1 to 50% by weight, preferably 1 to 30% by weight in the hair cosmetic.
Weight%. If it is less than 0.1% by weight, sufficient effects cannot be obtained, and if it exceeds 50% by weight, it becomes difficult to dissolve.

The antioxidant used in the present invention is α, β, 7 or δ-
Tocopherols such as tocopherol (vitamin E),
Flavones, flavonols, trioxyisoflavones, quercetin, rutin, gosybetin, flavone derivatives such as quercitrin, caffeic acid, gallic acid, chlorogenic acid, ferulic acid, gallic acid derivatives such as oryzanol, sezamol, sezamorin, gossypol, nordihydroguaiaretin acid, butylated hydroxyanisole, dibutylated hydroxytoluene, ascorbic acid, paramethoxyphenol, beta carotene, malachite green, adrenaline and extracts from Polygonaceae or similar plants.

The amount of antioxidant used in the present invention is 0.001 to 5% by weight, preferably 0.01 to 5% by weight based on the total amount of hair cosmetics.
It is 1% by weight.

When blending the antioxidant of the present invention, it is preferable to dissolve it in a lower alcohol such as ethanol or isopropyl alcohol. The blending amount is preferably 1 to 30% by weight, more preferably 5 to 15% by weight in the hair cosmetic. In addition, when blending high molecular weight silicone, it may be used by dissolving it in a volatile oil such as a low boiling point linear silicone oil, a low boiling point cyclic silicone oil, a low boiling point isoparaffinic hydrocarbon, or a fluorochloro-substituted hydrocarbon. preferable.

The low-boiling chain silicone is represented by the following general formula, and specific examples include hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, and hexadecamethylheptasiloxane.

(In the formula, n represents an integer of O to 5.) The cyclic silicone is represented by the following general formula, and specific examples include octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and tetrathecamethylcycloheptasiloxane. etc.

(In the formula, n represents an integer of 3 to 7.) Examples of low-boiling isoparaffinic hydrocarbons include isoparaffinic hydrocarbons having a boiling point in the range of 60 to 260°C at normal pressure, such as Exxon Co., Ltd. Isopar (registered trademark) A1, C1, D, E1, G1, H1, L1, M1, Shellsol (registered trademark) 71, manufactured by Shell, Tsurutrol (registered trademark) 100, manufactured by Philips, or Examples include 130 and 220.

Examples of fluorochloro-substituted hydrocarbons include trichlorotrifluoroethane and tetrachlorodifluoroethane.

The above-mentioned low boiling point oil can be used in any one kind or in combination of two or more kinds, and the total blending amount is 1 to 1 to 1 to 100% of the high molecular weight silicone.
50 times (by weight) is preferable.

Furthermore, in addition to the above components, lower alcohols such as ethanol and isopropyl alcohol may be added.

The dosage form of the present invention is arbitrary, such as a solubilized system, an emulsified system, a powder dispersion system, a two-layer system of oil-water, a three-layer system of oil-water and powder, etc.
Either is fine.

In the case of an emulsion system, it is common to emulsify an oil phase containing high molecular weight silicone with a nonionic surfactant, cationic surfactant, anionic surfactant, or a mixture thereof. Preferred is a method in which a mixture of a surfactant and a water-soluble polyhydric alcohol is prepared and then mixed with an oil phase to obtain an emulsified composition. Examples of polyhydric alcohols include propylene glycol, 1,3-butanediol, dipropylene glycol, glycerin, diglycerin, polyglycerin such as triglycerin, trimethylolethane, trimethylolpropane, erythritol, pentaerythritol, sorbitan, glucose, and sorbitol. , maltitol, sucrose, raffinose, trehalose, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, and the like. When preparing an emulsified composition, one or a combination of two or more of these may be used. Furthermore, as the oil constituting the oil phase, other oils such as those listed below can be used together with the high molecular weight silicone. In other words, oils and fats such as olive oil, coconut oil, safflower oil, castor oil, and cottonseed oil, waxes such as lanolin, jojoba oil, and carnauba wax, liquid paraffin, squalane, petrolatum,
These include hydrocarbon oils such as volatile isoparaffins, fatty acids, alcohols, ester oils such as cetyl octoate and isopropyl myristate, silicone oils such as dimethylpolysiloxane and methylphenylpolysiloxane, and silicone resins.

The general blending amount of the above ingredients is preferably 0.5 to 10% by weight of the surfactant and 20 to 80% by weight of the oil phase containing high molecular weight silicone based on the total amount of the hair cosmetic. In the case of a method of preparing a mixture with a polyhydric alcohol and mixing it with an oil phase to obtain an emulsified composition, the surfactant is 1 to 20% by weight, and the oil phase containing high molecular weight silicone is 10 to 701% by weight. , water-soluble polyhydric alcohol is 5 to 30% by weight of the total amount of cosmetics, and has a content of 50 to 99% by weight relative to the surfactant.
It is preferable to set it to about % by weight.

In addition to the above-mentioned ingredients, the hair cosmetic of the present invention may include ultraviolet absorbers, preservatives, drugs such as vitamins and hormones, and fragrances, depending on the purpose, within a quantitative and qualitative range that does not impair the effects of the present invention. may be added.

[Effects of the Invention] The hair cosmetic of the present invention protects hair from ultraviolet rays, has high transparency (does not impair the appearance of the hair, is highly water repellent, does not wash away with sweat, seawater, etc., and has a smooth feel). It is something that is given.

[Example] Next, the present invention will be explained in detail with reference to Examples. The present invention is not limited to these. The blending amount is in weight%.

Prior to Examples, effectiveness tests and evaluation methods will be explained.

Solstice star 111ij; UL.

The effect of preventing UV damage to hair was measured by comparing the tensile strength of hair. A set of 10 5c @ lengths is made from hair collected from the same person. If the stress when this is stretched by 20% is I, then the rate of change before and after treatment is expressed as I (after treatment) / I (before treatment), and the larger this rate of change, the greater the damage to the hair. ing.

Example 1 Hair oil (1) Decamethylcyclopentasiloxane 70.0 (2) Dimethylpolysiloxane (Rt and R2 are methyl groups, n = 3,000) 10.
0(3) Ethanol 19.9
(4) 3-t-butyl-4-hydroxyanisole 0.1 (5) Fragrance
Dissolve and mix appropriate amounts of manufacturing methods (1) to (5) with stirring. Viscosity 500cp
A liquid hair oil with good viscosity and transparency was obtained.

Comparative Example 1 Hair Oil (1) Decamethylcyclopentasiloxane 70.0 (2) Dimethylpolysiloxane (R1 and R2 are methyl groups, n = 3.0OO) 10.
0(3) Ethanol 20.0
(4) Fragrance Dissolve and mix appropriate amounts of manufacturing methods (1) to (4) with stirring. Viscosity 500cp
A liquid hair oil with good viscosity and transparency was obtained.

The hair to which the hair oils of Example 1 and Comparative Example 1 were applied, vermilion coated hair, and cloth hair were soaked in ion-exchanged water and exposed to ultraviolet rays for 14 hours.
Table 1 shows the rate of change when irradiated for 0 hours.

As is clear from Table 1, untreated hair has a rate of change of 0.
．． It can be seen that the damage was quite large at 39.

Further, it can be seen that Comparative Example 1 can slightly prevent damage caused by ultraviolet rays, but Example 1 does not prevent damage caused by ultraviolet rays.

Example 2 Hair oil (1) Dodecamethylcyclohexasiloxane 45.0 (2) Dimethylpolysiloxane (Rt is methyl group: phenyl group = 1: IR2 is methyl group, n = 20.000) 25.
0(3) Isopropyl alcohol 29.9
(4) 2,6-di-t-butyl-P-cresol
0.05 (5) Fragrance
A liquid hair oil having a viscosity of 5000 cps was obtained in the same manner as in Example 1.

Example 3 Hair blow (1) Decamethylcyclopentasiloxane 15.0 (2) Dimethylpolysiloxane (R1 and R2 are methyl groups n = 3.0OO) 3.0
(30,3-butylene gellicol 2.0(
4) Polyoxyethylene (60 mol addition) hydrogenated castor oil ester 1.0 (5) Ethanol 14.5 (
6) Ascorbic acid 0.5 (7)
Ion-exchanged water 62.0 (8) Fragrance Dissolve (2) in appropriate amount of manufacturing method (1), add to mixture of (3) and (4), emulsify, and mix with (5) to (8).

Example 4 Hair mousse (1) Octamethylcyclotetrasiloxane 10.0 (2) Dimethylpolysiloxane (Rs and R2 are methyl groups, n = 10,000) 2.0
(3) Glycerin 1.0 (4
) Polyoxyethylene (120 mol addition) Hardened castor oil ester 2.0 (5) Ethanol 15.0 (
6) β-carotene 0.2 (7
) Ion exchange water 62.8(8)n
-Butane 7.0 (9) Flavor Dissolve (2) in appropriate amount of manufacturing method (1), add to mixture of (3) and (4), emulsify, and add (5), (6), (7), and (9). After putting the mixed solution into an aerosol container and attaching a valve, fill it with (8).

Examples 2 to 4 prevent hair damage caused by ultraviolet rays, are highly transparent and do not impair the appearance of the hair, are highly water repellent, are not washed away by sweat, seawater, etc., and provide a smooth feel.

Patent applicant: Shiseido Co., Ltd.

Claims (1)

[Claims] (1) A hair cosmetic containing one or more high molecular weight silicones represented by the following general formula [I] and one or more antioxidants. ▲There are mathematical formulas, chemical formulas, tables, etc.▼ [I] (R_1 represents a methyl group or a part of it is a phenyl group, and R
_2 represents a methyl group or a hydroxyl group. Also, n is 3,00
Represents an integer from 0 to 20,000. )