US 9,849,075 B2Granted

Gel hair cosmetic

AssigneeKao Corporation

InventorsShinichi Tokunaga, Hiroto Tanamachi, Ryosuke Suzuki

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Abstract

The invention provides a gel-form hair cosmetic composition, which contains components (a) to (c) emulsified in an aqueous component, and which exhibits an endothermic peak temperature of from 40° C. to 75° C. as measured through DSC, wherein the components are (a) a polyalkyleneimine derivative or a salt thereof, the polyalkyleneimine derivative being formed of a polyalkyleneimine having a weight average molecular weight of from 3,300 to 50,000, in which one of the substituents of R1—CO—, R2—(CH2)n—CHX—CH2—, and R3—NH—CO— [R1 is H, alkyl, alkenyl, or the like; R2 is H, alkyl, alkoxy, alkenyl or the like; n is 0 or 1; X is H or OH; R3 is H, alkyl, or alkenyl; at least one of R1 to R3 has 13 or more carbon atoms; and the entirety of R1, R2, and R3 has an average number of carbon atoms of 9 or more and a linear group content of 30 mol % or more] is bonded to 40 mol % or more of the nitrogen atoms of the polyalkyleneimine; (b) a C12 to C28 saturated aliphatic alcohol; and (c) a cationic surfactant.

A hair cosmetic composition, which is an aqueous composition comprising components (a), (b), and (c) emulsified in an aqueous component, which composition exhibits an endothermic peak temperature of 40° C. to 75° C. as measured by a differential scanning calorimeter (DSC), wherein the components (a), (b), and (c) are:

(a) a polyalkyleneimine derivative or a salt thereof, the polyalkyleneimine derivative being formed of a polyalkyleneimine having a weight average molecular weight of 3,300 g/mol or more to 50,000 g/mol or less, in which at least one of the substituents represented by any of formulas (I), (II), and (III) is bonded to 60 mol % or more of the nitrogen atoms of the polyalkyleneimine, the formulas being:
R1—CO— (I)
R2—(CH2)n—CHX—CH2— (II)
R3—NH—CO— (III)
wherein, in formula (I), R1 has a linear chain or branched chain structure and is selected from the group consisting of a hydrogen atom, an alkyl group, an alkenyl group, and a hydroxyalkyl group;
in formula (II), R2 has a linear chain or branched chain structure and is selected from the group consisting of a hydrogen atom, an alkyl group, an alkoxy group, an alkenyl group, and an alkenyloxy group;
n is an integer of 0 or 1;
when R2 is a hydrogen atom, a linear-chain or a branched-chain alkyl group, or a linear-chain or a branched-chain alkenyl group, n is 0;
when R2 is an alkoxy group or an alkenyloxy group, n is 1;
and X represents a hydrogen atom or a hydroxyl group;
in formula (III), R3 has a linear chain or branched chain structure and is selected from the group consisting of a hydrogen atom, an alkyl group and an alkenyl group;
and
R1, R2, and R3 may be identical to or different from one another, and at least one of R1, R2, and R3 is a group having 13 or more carbon atoms;
the entirety of R1, R2, and R3 has an average number of carbon atoms of 9 or more;
and the entirety of R1, R2, and R3 has a linear group content of 30 mol % or more;
(b) a C12 to C28 saturated aliphatic alcohol;
and
(c) a cationic surfactant,
wherein a viscosity of the hair cosmetic composition is from 250 mPa·s to 100,000 mPa·s as measured with a TVB10 viscometer with a T-bar stage TS-10, and
wherein, among groups R1, R2, and R3, a content of groups having at least 13 carbon atoms is 70 mol % or more.

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Abstract

Claims20