# US 11,298,301 B2 · Oil-in-water emulsified cosmetic

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- Number: US 11,298,301 B2
- Document ID: US11298301B2
- Status: Granted
- Kind: B2
- Application number: 16/612,626
- Filed: 2017-12-22
- Published: 2020-06-25
- Granted: 2022-04-12
- Earliest claimed: 2017-12-22
- Assignees: Lvmh Recherche
- Applicants: Lvmh Recherche
- Inventors: Miyako Kitamura; Mai Ozawa; Takayoshi Sakoda
- Web page: https://patentgrep.com/patent/US11298301B2

## CPC

- A61K 8/062: {Oil-in-water emulsions}
- A61K 8/42: Amides
- A61K 8/73: Polysaccharides
- A61K 8/731: {Cellulose; Quaternized cellulose derivatives}
- A61K 8/8152: {Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers}
- A61K 8/87: Polyurethanes
- 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 2800/5428: amphoteric or zwitterionic
- 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 anionic surfactant, an oil agent, an amphiphilic polymer selected from the group consisting of hydrophobic group-modified hydrophilic urethane polymers, (meth)acrylic polymers having a side chain including hydrophilic and hydrophobic groups, and hydrophobic group-modified hydrophilic polysaccharides, and a charge neutralizer, wherein the cosmetic has a viscosity of 10,000 mPa·s or higher at 25° C.

## Claims

### Claim 1

An oil-in-water emulsified cosmetic comprising:
an aqueous medium;
an anionic surfactant;
an oil agent;
an amphiphilic polymer, selected from the group consisting of hydrophobic group-modified hydrophilic urethane polymers, (meth)acrylic polymers having a side chain including a hydrophilic group and a hydrophobic group, and hydrophobic group-modified hydrophilic polysaccharides; and
a charge neutralizer,
wherein the cosmetic has a viscosity of 10,000 mPa·s or higher at 25° C.

### Claim 2 (depends on 1)

The oil-in-water emulsified cosmetic according to claim 1, wherein the oil agent content ratio is 20 mass % or greater based on the total mass of the oil-in-water emulsified cosmetic.

### Claim 3 (depends on 1)

The oil-in-water emulsified cosmetic according to claim 1, wherein the hydrophobic group-modified hydrophilic urethane polymer is present and contains a hydrophobic group-modified polyether-urethane including polyalkylene oxide component.

### Claim 4 (depends on 1)

The oil-in-water emulsified cosmetic according to claim 1, wherein the hydrophobic group-modified hydrophilic polysaccharide is present and contains a hydrophobic group-modified hydroxyalkyl alkylcellulose.

### Claim 5 (depends on 1)

The oil-in-water emulsified cosmetic according to claim 1, wherein the oil agent comprises a non-polar oil, a silicone oil or a mixture thereof.

### Claim 6 (depends on 1)

The oil-in-water emulsified cosmetic according to claim 1, wherein the oil-in-water emulsified cosmetic is obtainable by high-pressure emulsification at a pressure of 100 MPa or greater.

### Claim 7 (depends on 1)

A process for preparing the oil-in-water emulsified cosmetic according to claim 1 comprising a step of emulsifying a mixture of components (A) to (E) in a high-pressure homogenizer at a pressure of 100 MPa or higher.

### Claim 8 (depends on 1)

A method of skin nourishing comprising a step of applying on skin an oil-in-water emulsified cosmetic according to claim 1.

### Claim 9 (depends on 3)

The oil-in-water emulsified cosmetic according to claim 3, wherein the hydrophobic group-modified hydrophilic urethane polymer contains polyethylene oxide and/or polypropylene oxide.