# US 8,771,654 B2 · Artificial nail composition having excellent appearance

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- Number: US 8,771,654 B2
- Document ID: US8771654B2
- Status: Granted
- Kind: B2
- Application number: 12/457,244
- Filed: 2009-06-04
- Published: 2009-12-10
- Granted: 2014-07-08
- Earliest claimed: 2008-06-05
- Assignees: Shofu Inc.
- Applicants: Hisaki Tanaka; Mikito Deguchi
- Inventors: Hisaki Tanaka; Mikito Deguchi
- Web page: https://patentgrep.com/patent/US8771654B2

## CPC

- A61K 8/18: characterised by the composition
- A61K 8/55: Phosphorus compounds
- A61K 8/8152: {Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers}
- A61K 8/87: Polyurethanes
- A61Q 3/02: Nail coatings
- 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 provides an artificial nail composition which can easily impart a special appearance to the tip of the finger, and which is an artificial nail material coated on a natural or artificial nail, and is used by coating on the surface of a natural or artificial nail followed by polymerization and, more particularly, an artificial nail composition which is vivid and has a natural color tone having a transparent sensation, that cannot be achieved by a conventionally used artificial nail composition containing an organic and/or inorganic colorant utilizing absorption and/or a scattering phenomenon of light, and imparts special appearance by an interference color.

## Claims

### Claim 1

An artificial nail composition consisting of:
a component (a): dimethacryloxyethyl-2,2,4-trimethylhexamethylene diurethane (UDMA), bisphenol A-diglycidyl methacrylate (BisGMA), tetradecaethylene glycol dimethacrylate (14G), bis[2-(methacryloxy)ethyl]phosphate (BisMEP), and 4-acryloxyethyltrimellitic acid (4AET),
a component (b): a member selected from the group consisting of 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide (MAPO), 2-hydroxy-2-methyl-1-phenyl -propan-1-one (DAR1173), 1-hydroxy-cyclohexyl-phenyl-ketone (IRG184) and a combination thereof;
a component (c): an organic colorant and titanium oxide, and
a component (d): an inorganic colorant having at least one kind of interference color, wherein the amount of the component (b) is 0.01 to 10 parts by weight, the amount of the organic colorant is 0.01 to 0.2 parts by weight, the amount of the titanium oxide is up to 0.3 parts by weight and the amount of the component (d) is 0.40 to 3.10 parts by weight with respect to 100 parts by weight of the component (a), and wherein a contrast ratio of the cured artificial nail composition is less than 0.6 when measured in accordance with JIS Z8701.

### Claim 2

An artificial nail composition consisting of:
a component (a): dimethacryloxyethyl-2,2,4-trimethylhexamethylene diurethane (UDMA), bisphenol A-diglycidyl methacrylate (BisGMA), tetradecaethylene glycol dimethacrylate (14G), bis[2-(methacryloxy)ethyl]phosphate (BisMEP), and 4-acryloxyethyltrimellitic acid (4AET),
a component (b): a member selected from the group consisting of 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide (MAPO), 2-hydroxy-2-methyl-1-phenyl -propan-1-one (DAR1173), 1-hydroxy-cyclohexyl-phenyl-ketone (IRG184) and a combination thereof;
a component (c): an organic colorant, and
a component (d): an inorganic colorant having at least one kind of interference color, wherein the amount of the component (b) is 0.01 to 10 parts by weight, the amount of the organic colorant is 0.01 to 0.2 parts by weight, and the amount of the component (d) is 0.40 to 3.10 parts by weight with respect to 100 parts by weight of the component (a), and wherein a contrast ratio of the cured artificial nail composition is less than 0.6 when measured in accordance with JIS Z8701.