# US 12,109,281 B2 · Oil-in-water emulsified cosmetic

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- Number: US 12,109,281 B2
- Document ID: US12109281B2
- Status: Granted
- Kind: B2
- Application number: 16/641,528
- Filed: 2018-12-18
- Published: 2020-07-02
- Granted: 2024-10-08
- Earliest claimed: 2018-12-18
- Assignees: Lvmh Recherche
- Applicants: Lvmh Recherche
- Inventors: Miyako Kitamura; Mai Ozawa; Takayoshi Sakoda
- Web page: https://patentgrep.com/patent/US12109281B2

## CPC

- A61K 8/062: {Oil-in-water emulsions}
- A61K 8/8152: {Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers}
- A61K 8/86: Polyethers
- A61K 8/90: Block copolymers (A61K8/89 takes precedence)
- A61K 8/92: Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof
- A61Q 19/00: Preparations for care of the skin
- A61Q 19/007: {Preparations for dry skin}
- 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

An oil-in-water emulsified cosmetic comprising an aqueous medium, an alkali-soluble polymer having a carboxy group and an amphiphilic side chain comprising a hydrophobic block and a hydrophilic block and bonded to the main chain at the hydrophilic block end, a nonionic surfactant having a C3-C6 straight-chain or cyclic polyol residue and an HLB of (6.0-12.0), a liquid oil and a paste oil.

## Claims

### Claim 1

An oil-in-water emulsified cosmetic comprising:
(A) an aqueous medium,
(B) an alkali-soluble polymer having a carboxy group and an amphiphilic side chain comprising a hydrophobic block and a hydrophilic block and being bonded to the main chain at the hydrophilic block end,
(C) PEG-20 glyceryl triisostearate as a nonionic surfactant having an HLB of 6.0-12.0,
(D) a liquid oil having a viscosity of less than 10,000 mPa·s at 25° C., as measured with a Brookfield rotating viscometer, and
(E) a paste oil having a viscosity of 10,000 mPa·s or greater at 25° C., as measured with a Brookfield rotating viscometer or a paste oil having a consistency of greater than 150 at 30° C. based on JIS-K-2220,
wherein the mass ratio of the paste oil (E) with respect to the liquid oil (D) is in a range from 0.2 to 0.5,
with the proviso that the oil-in-water emulsified cosmetic comprises no silicone-based oil component.

### Claim 2 (depends on 1)

The oil-in-water emulsified cosmetic according to claim 1,
wherein the alkali-soluble polymer further comprises alkoxycarbonyl group, and the amphiphilic side chain comprises a C12 to C24 hydrocarbon skeleton as the hydrophobic block and a polyoxyethylene skeleton as the hydrophilic block.

### Claim 3 (depends on 1)

The oil-in-water emulsified cosmetic according to claim 1,
wherein either or both the liquid oil and the paste oil are polar oil agents.

### Claim 4 (depends on 1)

The oil-in-water emulsified cosmetic according to claim 1, wherein the component (C) content is in a range from 0.05 to 5.00 mass %.