Hair cosmetic
AssigneeKao Corporation
InventorsNaoyuki Yamazaki, Yasuhiro Doi, Hiroyuki Terazaki
Life of this patent
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Abstract
The present invention relates to a hair cosmetic capable of giving good finger combability and manageability with no oily feeling to the hair treated therewith and dried, and to a method for producing the hair cosmetic. The hair cosmetic contains a cationized hydroxypropyl cellulose (A), an oil (B) of which the amount of dissolution in 100 g of water at 20° C. is from 0 to 1 g, and a surfactant (C), wherein the cationized hydroxypropyl cellulose (A) has an anhydroglucose-derived main chain and has a degree of substitution with cationized ethyleneoxy group of from 0.01 to 2.9 and a degree of substitution with propyleneoxy group of from 0.1 to 4.0, and the production method is for producing the hair cosmetic.
Claims14
A hair cosmetic comprising a cationized hydroxypropyl cellulose (A), an oil (B) of which the amount of dissolution in 100 g of water at 20° C. is from 0 to 1 g, and a surfactant (C), wherein the cationized hydroxypropyl cellulose (A) has an anhydroglucose-derived main chain represented by the following general formula (1), and has a degree of substitution with cationized ethyleneoxy group of from 0.01 to 2.9 and a degree of substitution with propyleneoxy group of from 0.1 to 4.0:
- (wherein R1, R2 and R3 each independently represent a substituent having a cationized ethyleneoxy group and a propyleneoxy group represented by the following general formula (2);
- n indicates a mean degree of polymerization of anhydroglucose and is a number of from 50 to 5000),
- (wherein one of Y1 and Y2 is a hydrogen atom and the other is a cationic group represented by the following general formula (3);
- PO represents a propyleneoxy group;
- p indicates the number of cationized ethyleneoxy groups ((—CH(Y1)—CH(Y2)—O—) in the general formula (2) and q indicates the number of propyleneoxy groups (—PO—) therein, each representing 0 or a positive integer;
- in case where both of p and q are not 0, the addition sequence of the cationized ethyleneoxy group and the propyleneoxy group is not defined, and in case where p and/or q are/is 2 or more, a binding form may be any of like a block co-polymer or like a random co-polymer),
- (wherein R4, R5 and R6 each independently represent a linear or branched alkyl group having from 1 to 3 carbon atoms, and X− represents an anionic group).
A method for producing a hair cosmetic, comprising the following steps (I) to (III):
- Step (I):
- a step of mixing a cationized hydroxypropyl cellulose (A) and an anionic surfactant (C′) to prepare a mixture,
- Step (II):
- a step of mixing the mixture obtained in the step (I) with an oil (B) to prepare an emulsion,
- Step (III):
- a step of mixing the emulsion obtained in the step (II) with a surfactant (C) and water to give a hair cosmetic.
Dependencies are inferred from the claim text.