# US 9,517,360 B2 · Nitrocellulose-free nail polish compositions

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- Number: US 9,517,360 B2
- Document ID: US9517360B2
- Status: Granted
- Kind: B2
- Application number: 12/770,886
- Filed: 2010-04-30
- Published: 2010-11-04
- Granted: 2016-12-13
- Earliest claimed: 2009-05-04
- Assignees: L'oreal
- Applicants: Luis Ortega; Hy Si Bui; Ram Hariharan; Mohamed Kanji
- Inventors: Luis Ortega; Hy Si Bui; Ram Hariharan; Mohamed Kanji
- Web page: https://patentgrep.com/patent/US9517360B2

## CPC

- A61K 8/84: obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
- A61K 8/8164: {Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers, e.g. poly (methyl vinyl ether-co-maleic anhydride)}
- A61Q 3/00: Manicure or pedicure preparations
- A61Q 3/02: Nail coatings
- A61K 8/85: Polyesters
- A61Q 17/00: Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
- 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

The present invention relates to a nail polish composition, comprising at least one high gloss film forming agent chosen from an esterified styrene maleic anhydride copolymer, a non-esterified styrene maleic anhydride copolymer and mixtures thereof, at least one co-film forming agent chosen from an epoxy resin, optionally, at least one plasticizer, at least one solvent, and optionally, at least one colorant, wherein the composition does not require use of nitrocellulose and can be used to makeup or protect nails. Such compositions impart high gloss, good adhesion and long wear properties.

## Claims

### Claim 1

A nail polish composition, comprising:
a. at least one high gloss film forming agent chosen from (1) an esterified styrene maleic anhydride copolymer selected from mixed methyl and isobutyl partial ester copolymers, (2) a non-esterified styrene maleic anhydride copolymer, and mixtures thereof, each of said copolymers having a styrene/maleic anhydride monomer molar ratio of from 1:2 to 2:1, and mixtures thereof, said film forming agent being present in an amount from about 10% to about 20% by weight of the total composition, having a molecular weight from about 5,000 to about 200,000 and having a Tg ranging from about 125° C. to about 160° C.;
b. a tosylamide epoxy resin having a Tg of less than about 80° C. and being present in an amount ranging from about 11% to about 20% of the total weight of the composition;
c. at least one plasticizer being present in an amount of from about 1% to about 20% by weight, based on the total weight of the composition;
d. at least one solvent, said solvent being present in an amount of from about 10% to about 80% by weight, based on the total weight of the composition; and
e. optionally, at least one colorant;
wherein the weight ratio of the high gloss film forming agent to the at least one co-film forming agent is from about 1 to 1 to about 2 to 1, said composition having a gloss value of at least 80 at angles of 20° and 60° and containing about 0% nitrocellulose.

### Claim 2 (depends on 1)

The composition of claim 1, wherein the at least one high gloss film forming agent is a mixed methyl and isobutyl partial ester.

### Claim 3 (depends on 1)

The composition of claim 1, wherein the at least one solvent is chosen from ethyl acetate, propyl acetate, butyl acetate, and mixtures thereof.

### Claim 4 (depends on 1)

A method of making up or protecting nails comprising applying onto the nails the nail polish composition of claim 1.

### Claim 5 (depends on 4)

The method of claim 4, wherein the at least one high gloss film forming agent is a mixed methyl and isobutyl partial ester.

### Claim 6 (depends on 4)

The method of claim 4, wherein the at least one solvent is chosen from ethyl acetate, propyl acetate, butyl acetate and mixtures thereof.