JPH0739335B2 - Hair treatment agent - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair treatment agent, and more particularly to a hair treatment agent which is excellent in hair damage prevention and protection effects and which lasts.

[0002]

2. Description of the Related Art Generally, hair is damaged when hair care such as washing, blowing, brushing, etc. is routinely repeated,
As a result, problems such as dry hair and split ends and broken hair occur.

Therefore, for the purpose of preventing damage and protecting and repairing damaged hair, hair cosmetics containing a water-resistant film-forming substance such as silicone gum or silicone resin (Japanese Patent Laid-Open No. 1-272513). Has been developed.

However, even if a hair treatment agent in which the above film-forming substance is directly blended, for example, a hair treatment agent in which these substances are simply dissolved in a specific solvent is used, the formed coating film does not exert physical force. It was weak and had the drawback of being easily washed off by daily shampoo and the like. Therefore, the effect of preventing hair damage and protecting hair by such a hair treatment agent is temporary and not satisfactory.

Therefore, there has been a demand for a hair treatment composition having excellent durability, which does not impair the hair damage-preventing and hair-protecting effects even if shampoo or the like is washed, blown or brushed.

Under the circumstances, as a result of intensive studies by the present inventor, as a result of incorporating a specific silicone derivative and a specific amount of a nonionic surfactant, the average particle size of the emulsified particles was
It was found that the hair treatment agent obtained by emulsifying to a range of 0.1 to 10 μm is excellent in hair damage prevention and protection effects, and further, these effects continue and are excellent in usability. The present invention has been completed.

That is, the present invention provides the following formula (1):

[Chemical 2] [In the formula, R ₁ represents a methyl group or a phenyl group which may be the same or different, R ₂ represents a methyl group or a hydroxyl group which may be the same or different, and n is 2400 or more and 400 or more.
A silicone derivative having a viscosity at 25 ° C. of 1,000,000 cSt or more 0.1 to 10
%, And 0.1 to 10% by weight of a nonionic surfactant, and an emulsified particle having an average particle diameter of 0.1 to 10 μm. .

The silicone derivative used in the hair treatment composition of the present invention is represented by the general formula (1) and has a viscosity at 25 ° C. of 1 million cSt or more. In the general formula (1), n is conventionally 5000 to 15000 in consideration of water resistance.
Although those having a degree of use have been used, in the present invention, water resistance and washing resistance can be maintained even if a lower molecular weight one is used. Further, when n is 3000 to 4000 or more, it becomes gum-like at room temperature, but in this case, it can be used by dissolving it in a suitable solvent such as light liquid isoparaffin or low boiling point volatile cyclic silicone.

[0009]

[0010]

Such a silicone derivative is contained in the hair treatment composition of the present invention in an amount of 0.1 to 10% by weight (hereinafter simply referred to as "%").
Be compounded. If the content is less than 0.1%, a sufficient effect cannot be obtained, and if it exceeds 10%, the usability is deteriorated, which is not preferable.

The nonionic surfactant used in the present invention includes polyoxyethylene (hereinafter referred to as "POE") alkyl ether, POE alkylallyl ether, oxyethylene / oxypropylene block copolymer, sorbitan fatty acid ester, POE sorbitan fatty acid. Ester, POE sorbitol fatty acid ester, glycerin fatty acid ester, POE fatty acid ester, PO
Examples include E alkylamine, POE castor oil / hardened castor oil, alkylalkanolamide, and polyether-modified silicone. Above all, particularly preferred is carbon number 10
Alkanolamides having ~ 28 alkyl groups, i.e. monoethanolamide, diethanolamide and the like.

The amount of the nonionic surfactant added is such that the average particle size of the emulsified particles in the emulsion-type hair treatment agent of the present invention is 0.1 to 10 μm.
It is the amount necessary to obtain m, and is usually 0.1 to 10%.

If the average particle size of the emulsified particles in the hair treatment composition of the present invention is smaller than 0.1 μm, the film-forming substance is poorly adsorbed and the washing resistance is poor. If it is larger than 10 μm, the amount of film components adsorbed is small. It becomes too large and causes problems such as stickiness, which is not preferable.

In the hair treatment composition of the present invention, in addition to the above essential components, oil agents such as ester oils, oils and fats, waxes and hydrocarbon oils; water; humectants such as glycerin and propylene glycol; cationized cellulose and the like. Conditioning agents;
Viscosity modifiers such as ethanol, hydroxyethyl cellulose, and methyl cellulose; preservatives such as methylparaben and urea; antidandruff agents such as zinc pyrithione and pyroctoolamine; UV absorbers such as oxybenzone; antioxidants such as dibutylhydroxytoluene and tocopherol acetate; pearlizing Agents, fragrances, dyes and the like can be added within a range not impairing the effects of the present invention.

The method for preparing the emulsified hair treatment agent of the present invention includes, for example, (i) a film-forming substance and a nonionic surfactant are uniformly mixed, and a predetermined amount of water or water and a water-soluble polyvalent compound is used. It can be obtained by adding a mixture of alcohols and the like, (ii) thoroughly mixing the mixture with a homomixer, a homogenizer, a colloid mill and the like, and (iii) adding carriers such as water and ethanol. The mixing ratio of the film-forming substance / nonionic surfactant in this step (i),
Further, the average particle diameter of the emulsified particles can be controlled by the mixing conditions in step (ii), that is, the type of mixer and stirring conditions. The volume particle size distribution of the emulsified particles can be measured with a Coulter counter.

Examples of the form of the hair treatment agent of the present invention thus obtained include hair rinse, hair treatment, hair blow, and hair spray.

[0018]

The hair treatment agent of the present invention prevents damage to the hair,
It also has an excellent protective effect, the effect is not easily deteriorated by washing hair, and the usability is excellent.

[0019]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.

Examples 1 to 3 Hair treatment agents having the compositions shown in Table 1 were prepared by the following preparation method, and the hair was treated with the hair treatment agent, and then the hair was washed, and the luster and comb of the hair before and after washing were obtained. Passability and smoothness were evaluated. The results are shown in Table 1.

(Preparation Method) Example 1 Dimethylpolysiloxane, coconut oil fatty acid diethanolamide and water were mixed at a ratio of 2: 1: 1 and stirred for 10 minutes to disperse. To 40 g of this preliminary mixture, 960 g of water was added and dispersed for 5 minutes with a homomixer. Example 2 Dimethyl polysiloxane, POE lauryl ether and water were mixed in a ratio of 10: 1: 2, and stirred for 5 minutes to disperse. To 130 g of this preliminary mixture, 870 g of water was added and dispersed for 5 minutes with a homomixer. Example 3 Dimethyl polysiloxane, POE hydrogenated castor oil and water were mixed in a ratio of 1: 10: 3 and dispersed for 15 minutes. To 140 g of this preliminary mixture, 860 g of water was added and dispersed for 15 minutes with a homomixer. Comparative Example 1 Dimethyl polysiloxane, nonyl phenyl ether and water were mixed at a ratio of 1: 10: 2, stirred for 10 minutes, 870 g of water was added to 130 g of this mixture, and the mixture was stirred at high speed for 60 minutes with a homomixer. Comparative Example 2 Dimethyl polysiloxane, POE hydrogenated castor oil and water 3
Mix at a ratio of 0: 1: 4, stir for 5 minutes and mix 3
Water (650 g) was added to the mixture (50 g), and the mixture was stirred with a homomixer for 3 minutes. Comparative Example 3 The same procedure as in Example 1 was performed.

(Hair Treatment and Washing Method) (1) 1 g of a sample is applied to a human hair bundle having a weight of 5 g, the shape is adjusted with a comb, and the hair is naturally dried. (2) Next, 0.3 g of 2% sodium lauryl sulfate aqueous solution is applied, washed, rinsed sufficiently with warm water, and then naturally dried again. This operation is once. (Evaluation method) The sensory evaluation was performed immediately after application and after 5 times of shampoo washing with regard to gloss, combability, and smoothness. The evaluation criteria are as follows. Gloss immediately after coating ○: There is gloss. Δ: There is a little gloss. X: There is no gloss. Combability immediately after application ○: Good combability. Δ: Comb is slightly better. X: Combing is bad. Smoothness immediately after coating ○: Smooth Δ: Slightly smooth ×: Not smooth Evaluation after washing 5 times ◯: Same as immediately after treatment Δ: Slightly inferior to immediately after treatment X: Clearly inferior to that immediately after treatment.

[Table 1]

Example 4 A hair treatment agent having the following composition was prepared by the following method. As comparative products, one in which silicone gum was dissolved in a solvent (Comparative Example 4) and one in which silicone was emulsified and dispersed with a cationic surfactant (Comparative Example 5) were also prepared.

Using each of these, hair treatment and washing were carried out by the method of Examples 1 to 3, and the residual rate of silicone was quantitatively calculated by atomic absorption spectrometry (EGGO
OTHand GSKOHL, J.Soc.Cosmet.Chem., 39 , 383 (1988))
did. The results are shown in Table 2.

Example 4 Hair Treatment: (1) Dimethyl polysiloxane (7 million cSt, n = 3000) 2 (%) (2) Dimethyl polysiloxane (500 cSt, n = 250) 8 (3) Diethanolaminium laurate Do 1 (4) Purified water Remaining amount Average emulsified particle size 1 μm

(Production Method) (1) is dissolved in (2), (3) is added and mixed by stirring, and (4) is gradually added with stirring. The emulsion particle size was measured with a Coulter counter.

Comparative Example 4 Hair Treatment: (1) Dimethyl polysiloxane (7 million cSt, n = 3000) 2 (%) (2) Dimethyl polysiloxane (500 cSt, n = 250) 8 (3) Light liquid isoparaffin 90

(Production method) (1) and (2) are added to (3) and dissolved. (Comparative Example 5) Hair treatment: (1) Dimethyl polysiloxane (7 million cSt, n = 3000) 2 (%) (2) Dimethyl polysiloxane (500 cSt, n = 250) 8 (3) Stearyl trimethyl ammonium chloride 2 ( 4) Purified water Remaining average emulsified particle size 1 μm

(Production method) (1) is dissolved in (2), (3) is added and mixed with stirring, and (4) is gradually added with stirring. The emulsion particle size was measured with a Coulter counter.

[Table 2]

Example 5 Hairblow: (1) Dimethylpolysiloxane (10 million cSt, n = 3500) 2 (%) (2) Decamethylcyclopentasiloxane 3 (3) Silicone resin 0.2 (4) Polyether-modified silicone SH3771c 2 (5) Propylene glycol 3 (6) Ethanol 5 (7) Purified water Remaining amount Average emulsified particle size 0.5 μm

(Production method) (1) and (3) are dissolved in (2),
Add to the mixture of (4), (5) and (6), mix and stir,
Gradually add (7).

Example 6 Hair Treatment: (1) Dimethylpolysiloxane (1 million cSt, n = 2400) 2 (%) (2) Octomethylcyclobutylsiloxane 5 (3) Light liquid isoparaffin 70 (4) Glycerin trioctanoate 3 (5) POE (25) Octyldodecyl ether 2 (6) Glycerin 4 (7) Purified water Remaining amount Average emulsified particle size 3 μm

(Production Method) (1) is dissolved in (2), and then
Mix with (3), (4), (5) and (6) gradually while stirring (7)
Is added. Each of the hair treatment agents of Examples 5 to 6 had excellent cleaning resistance and sustained treatment effects.

Example 7 Hair Mist: (1) Dimethyl polysiloxane (7 million cSt, n = 3000) 1 (%) (2) Dimethyl polysiloxane (200 cSt, n = 120) 5 (3) Silicone resin (Toshiba Silicone TSA750) 0.1 (4) Coconut oil fatty acid diethanolamide 3 (5) Purified water Remaining amount Average emulsified particle size 5 μm (Production method) (1), (2), (3) are mixed, and then (4) is added. While mixing and stirring, gradually add (5).

Example 8 Hair Treatment: (1) Dimethyl polysiloxane (1 million cSt, n = 2400) 2 (%) (2) Dimethyl polysiloxane (5000 cSt, n = 600) 4 (3) Diethanolamide stearate 2 (4) Glycerin 2 (5) Purified water Remaining amount Average emulsified particle size 6 μm (Production method) (1), (2), (3), (4) are mixed and stirred, and (5) is gradually added. .

Claims (1)

[Claims] 1. The following formula (1): [In the formula, R ₁ represents a methyl group or a phenyl group which may be the same or different, R ₂ represents a methyl group or a hydroxyl group which may be the same or different, and n is 2400 or more and 400 or more.
A silicone derivative having a viscosity at 25 ° C. of 1,000,000 cSt or more 0.1 to 10
%, And 0.1 to 10% by weight of a nonionic surfactant, and the emulsified particles have an average particle size of 0.1 to 10 μm.