JPH02215709A - Hair cosmetic - Google Patents

Abstract

PURPOSE:To obtain a hair cosmetic having wetting touch and excellently combing properties while providing the hair with smooth touch, containing a high- molecular weight silicone and a water-soluble chitin or chitosan derivative. CONSTITUTION:A hair cosmetic containing (A) a high-molecular weight silicone shown by the formula (R1 is methyl or phenyl; R2 is methyl or OH; n is integer of >=2,000), preferably dimethylpolysiloxane or methylphenylpolysiloxane wherein n is 3,500-9,000 and (B) a water-soluble chitin derivative (e.g. glycol chitin having 3,000-10,000 molecular weight) or chitosan derivative (e.g. hydroxypropyl chitosan) having 500,000-1,000,000 molecular weight) in the ratio of 0.01-50wt.%, preferably 0.5-30wt.% component A and 1-50wt.%, preferably 5-20wt.% component B. Further the hair cosmetic is preferably blended with 0.01-3.0wt.% fats and oils for cosmetic as an arbitrary component.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a hair cosmetic that provides a moist feel while imparting a smooth feel to the hair.

[Conventional technology]

Conventionally, in hair cosmetics, oils such as silicone oils, ester oils, and hydrocarbon oils have been solubilized, emulsified, or dissolved for the purpose of imparting smoothness to hair. In particular, silicone oil has been widely used in recent years because of its low surface tension, excellent adhesion to hair, and good gloss.

[Problem to be solved by the invention]

However, silicone oils, ester oils, hydrocarbon oils, etc. are all water-repellent oils, so they cannot replenish moisture to the hair and lack a moist feel, and if they are used in large quantities, they can make the hair greasy. there were.

[Means to solve the problem]

As a result of intensive research, the present inventors aimed to solve these drawbacks and obtain a hair cosmetic that gives hair a smooth feel, has a moist feel, and has good combability.
The present invention was completed based on the discovery that a hair cosmetic that satisfies the desired conditions can be obtained by combining a specific high molecular weight silicone with a water-soluble chitin or chitosan derivative.

That is, the present invention is based on (1) the following general formula (wherein Rt represents a methyl group or a portion thereof represents a phenyl group, and Rt represents a methyl group or a hydroxyl group).

Further, n represents an integer of 2,000 or more. ) and (2) 1 to 50% by weight of one or more types selected from water-soluble chitin or chitosan derivatives. It provides a fee.

The present invention will be explained in detail below.

The high molecular weight silicone used in the present invention has the general formula (
I), in which the value of On is 2.000 or more, and exhibits soft rubber-like properties at room temperature.

Specific chemical structures include dimethylpolysiloxane, methylphenylpolysiloxane, dimethylpolysiloxane containing a terminal hydroxyl group, and methylphenylpolysiloxane containing a terminal hydroxyl group.

Among these, dimethylpolysiloxane and methylphenylpolysiloxane, in which n in the above formula (1) is about 2.500 to 20,000, are often used.
It is preferable that n is about 3,500 to 9,000.The viscosity of these dimethylpolysiloxanes and methylphenylpolysiloxanes is about 1,000 to 2,500,000 stokes at 25°C. Commonly used, from 10,000 stokes to 700.0
00 Stokes is preferred, and these soft rubbery silicones can also be used after being diluted with a suitable solvent, such as a low molecular weight silicone or hydrocarbon. As the low molecular weight silicone, cyclic and chain dimethylpolysiloxanes are preferred, and chain dimethylpolysiloxanes having a degree of polymerization of about 8 to 12 are particularly preferred.

Furthermore, as water-soluble chitin or chitosan derivatives used in the present invention, any of those described in US Pat. Although it is possible to chemically modify and use the following compounds, glycol chitin, carboxymethyl chitin, chitin sulfate, hydroxypropyl chitosan, etc. having the following structures are preferred.

(Hydroxypropyl chitosan) where n and +* represent an integer of 1 or more. ) Among these, glycol chitin, carboxymethyl chitin, and chitin sulfate preferably have a molecular weight of about 3.000 to io, ooo, and hydroxypropyl chitosan preferably has a molecular weight of about 500,000 to 1.000,000.

The amount of the polymeric silicone represented by the above general formula (1) in the hair cosmetic of the present invention is 0.01 to 50% by weight, preferably 0.5 to 30% by weight.

The amount of water-soluble chitin or chitosan derivative added is 1
-50% by weight, preferably 5-20% by weight.

In addition to the above-mentioned essential ingredients, the hair cosmetic composition of the present invention may contain optional ingredients, preferably cosmetic oils and fats. Cosmetic oils and fats include castor oil, olive oil, cacao oil,
Glycerides such as apocard oil and mink oil; waxes such as beeswax, spermaceti, lanolin, and carnauba wax;
Hydrocarbons such as liquid paraffin, ceresin, and squalane; Alcohols such as cetyl alcohol, oleyl alcohol, and hexadecyl alcohol; Esters such as decyl nioleate, isopropyl lanophosphate, isopropyl myristate, and oleyl oleate, etc. for general cosmetics. A wide range of fats and oils can be used, especially castor oil, olive oil, apocado oil, mink oil, lanolin,
Fats and oils with ester bonds that are liquid or paste-like at room temperature, such as liquid lanolin, decyl oleate, and isopropyl lanophosphate, and liquid paraffin are suitable. The amount of these cosmetic oils and fats added in hair cosmetics is 0.01 to 3.
0% by weight remains.

Furthermore, in order to increase the commercial value, fragrances or pigments may be added, and preservatives or antioxidants may also be added for the purpose of preventing deterioration of the composition over time.

In addition to shampoo conditioners, liquid hair styling products, and hair creams, the hair cosmetics of the present invention can also be used in the form of sprays or mousses by adding a propellant such as liquefied petroleum gas and sealing the mixture in a pressure-resistant container. .

〔Effect of the invention〕

ADVANTAGE OF THE INVENTION According to the present invention, it was possible to provide a hair cosmetic that imparts a smooth feel to the hair, has a moist feel, and has good combability.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples.

Note that the percentages in the examples are based on weight unless otherwise specified.

Example 1 Various hair creams having the following compositions were manufactured.

Hair cream composition> Smoothness of hair, smoothness of finished hair Chitin/chitosan derivatives Liquid paraffin Beeswax ethanol Polyoxyethylene sorbitan Monostair Methyl paraben Methyl paraben Water Table 1 10% Rate 3 0.1 0.1 Remaining amount (Ro) ) Squeaky feeling of finished hair The feeling of using the various hair creams obtained was evaluated. The feeling of use was evaluated by a sensory test conducted by a panel of 10 experts, and an absolute evaluation was made based on the following criteria.

(b) The results of evaluation of the moist feeling of the finished hair and the wet state are also shown in Table 1.

From the results of this experiment, it is clear that the hair cream of the present invention containing polymeric silicone and chitin/chitosan derivatives leaves hair moisturized and smooth, and does not feel squeaky, compared to conventional hair creams.

Example 2 The substances shown in items 1 to 2 below were mixed at room temperature to produce a hair tonic having the following composition.

<Composition of hair tonic> ■Ethanol 50.0%■Hinokitiol 0.05■Menthol
0.1■Fragrance
Appropriate amount■Coloring agent Appropriate amount■Water The resulting hair tonic had an excellent feel and made hair supple.

Example 3 The substances shown below (1), (2), (2) and (2) were heated and mixed at 70°C, and after cooling, the substances shown below (1) and (2) were added to produce a hair cream having the following composition.

<Hair cream composition> ■Beeswax ■Fragrance ■Preservative ■Water The resulting hair clitoris Ta.

1.0 Appropriate amount Appropriate amount remainder Ichimu shows excellent usability.

Claims (1)

[Claims] 1. (1) The following general formula ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (In the formula, 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 2
,000 or more. ) and (2) 1 to 50% by weight of one or more types selected from water-soluble chitin or chitosan derivatives. fee.