# US 10,869,828 B2 · Cosmetic

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- Number: US 10,869,828 B2
- Document ID: US10869828B2
- Status: Granted
- Kind: B2
- Application number: 16/314,896
- Filed: 2017-04-26
- Published: 2019-07-04
- Granted: 2020-12-22
- Earliest claimed: 2016-07-04
- Assignees: Shin-Etsu Chemical Co., Ltd.
- Applicants: Shin-Etsu Chemical Co., Ltd.
- Inventors: Masayuki Konishi; Chihiro Hayakawa
- Web page: https://patentgrep.com/patent/US10869828B2

## CPC

- A61K 8/898: containing nitrogen, e.g. amodimethicone, trimethyl silyl amodimethicone or dimethicone propyl PG-betaine
- A61Q 1/02: Preparations containing skin colorants, e.g. pigments (preparations in powder form A61Q1/12)
- A61Q 1/06: Lipsticks
- A61Q 1/08: for cheeks, e.g. rouge
- A61Q 1/10: for eyes, e.g. eyeliner, mascara
- A61Q 1/12: Face or body powders for grooming, adorning or absorbing
- A61Q 3/02: Nail coatings
- A61Q 5/06: Preparations for styling the hair, e.g. by temporary shaping or colouring
- A61Q 5/12: Preparations containing hair conditioners
- A61Q 15/00: Anti-perspirants or body deodorants (deodorisation of air A61L9/00)
- A61Q 17/04: Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
- A61Q 19/00: Preparations for care of the skin
- A61Q 19/08: Anti-ageing preparations
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS

## Abstract

A cosmetic containing an organosiloxane graft polyvinyl alcohol polymer having a structural unit shown by the general formula (1) and a structural unit shown by the general formula (3). The organosiloxane graft polyvinyl alcohol polymer has a number average molecular weight (Mn) of 5,000 to 500,000 as measured by GPC. There can be provided a cosmetic which has favorable feeling on use and oil resistance, and which is excellent in cosmetic durability improvement. where M1 and M2 each represent a hydrogen atom, an acetyl group, or a siloxane group shown by the general formula (2), provided that at least one of M1 and M2 is a siloxane group shown by the general formula (2); and A represents a single bond or a linking group, where M3 represents a hydrogen atom, an acetyl group, or a siloxane group shown by the formula (2).

## Claims

### Claim 1

A cosmetic comprising an organosiloxane graft polyvinyl alcohol polymer comprising: a structural unit shown by the following general formula (1), and a structural unit shown by the following general formula (3),
wherein the cosmetic comprises the organosiloxane graft polyvinyl alcohol polymer in an amount of 0.01 to 20 mass% relative to the total amount of the cosmetic,
wherein the organosiloxane graft polyvinyl alcohol polymer has a number average molecular weight (Mn) of 5,000 to 500,000 as measured by GPC in terms of polystyrene,
wherein M1 and M2 each represent a hydrogen atom, an acetyl group, or a siloxane group shown by the following general formula (2), provided that at least one of M1 and M2 is a siloxane group shown by the general formula (2); and A represents a single bond,
wherein R1 represents a monovalent organic group having 1 to 6 carbon atoms; R2, R3, and R4 each represent a monovalent organic group having 1 to 6 carbon atoms or a siloxy group shown by —OSiR5R6R7, where R5, R6, and R7 each represent a monovalent organic group having 1 to 6 carbon atoms; “n” represents an integer of 1 to 10; and “a” represents an integer of 0 to 2,
wherein M3 represents a hydrogen atom, an acetyl group, or a siloxane group shown by the general formula (2).

### Claim 2 (depends on 1)

The cosmetic according to claim 1, wherein in the general formula (2), “n” is 3, R2, R3, and R4 are methyl groups, and “a” is 0.

### Claim 3 (depends on 1)

The cosmetic according to claim 1, wherein the organosiloxane graft polyvinyl alcohol polymer is a reaction product of a (butenediol/vinyl alcohol) copolymer and tris(trimethylsiloxy)silylpropyl isocyanate.

### Claim 4 (depends on 2)

The cosmetic according to claim 2, wherein the organosiloxane graft polyvinyl alcohol polymer is a reaction product of a (butenediol/vinyl alcohol) copolymer and tris(trimethylsiloxy)silylpropyl isocyanate.