# US 11,304,492 B2 · Artificial nail tip and curing composition set and applying method thereof

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- Number: US 11,304,492 B2
- Document ID: US11304492B2
- Status: Granted
- Kind: B2
- Application number: 15/916,216
- Filed: 2018-03-08
- Published: 2019-09-12
- Granted: 2022-04-19
- Earliest claimed: 2018-03-08
- Assignees: Applied Lacquer Industries Inc.
- Applicants: Carol Ma
- Inventors: Carol Ma
- Web page: https://patentgrep.com/patent/US11304492B2

## CPC

- A45D 31/00: Artificial nails
- A45D 29/00: Manicuring or pedicuring implements
- A45D 29/18: Manicure or pedicure sets, e.g. combinations without case, etui, or the like (combined with or on sheath of scissors B26B13/22, B26B29/04)
- C08F 290/067: {Polyurethanes; Polyureas}
- C08L 75/16: having terminal carbon-to-carbon unsaturated bonds
- C09D 175/16: having terminal carbon-to-carbon unsaturated bonds
- C09J 175/14: Polyurethanes having carbon-to-carbon unsaturated bonds
- H10K 50/818: Reflective anodes, e.g. ITO combined with thick metallic layers
- H10K 59/12: Active-matrix OLED [AMOLED] displays
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 71/00: Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K 77/10: Substrates, e.g. flexible substrates
- A45D 29/04: Nail files, e.g. manually operated
- A45D 29/12: manually operated
- A45D 2200/205: Radiation, e.g. UV, infrared
- A45D 2200/25: Kits
- H10K 59/1201: {Manufacture or treatment}
- A45D: HAIRDRESSING OR SHAVING EQUIPMENT (wigs, toupees or the like A41G3/00, A41G5/00; hairdressers' chairs A47C1/04; hair cutting appliances, razors B26B); EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A nail tip curing composition includes an Extend Gel, an edge-off flat brush, a nail filing device, a plurality of GEL-X tips, a pH Bonder, and a Non-Acidic Gel Primer. The pH Bonder forms a pH Bonder layer on a surface of a fingernail. The Non-Acidic Gel Primer forms a Non-Acidic Gel Prime layer overlapped on the pH Bonder layer. The Extend Gel forms an Extend Gel layer overlapped on the Non-Acidic Gel Prime layer. The GEL-X tip is filed by the nail filing device and the Extend Gel is applied on an underside contact surface of the Gel-X tip by the edge-off flat brush. The underside contact surface of the Gel-X tip is contacted with the Extend Gel layer on the fingernail in such a manner that the Gel-X tip is firmly affixed on the fingernail.

## Claims

### Claim 1

A method of applying an artificial nail tip made of acrylic material on a fingernail, the method comprising:
(a) applying a layer of adhesive composition to the top surface of a fingernail, wherein the adhesive composition consists of:
75.0-80.0% by weight of polyurethane acrylate oligomer,
10.0-15.0% by weight of 2-hydroxyethyl methacrylate (HEMA),
1.0-5.0% by weight of 1-hydroxycyclohexyl phenyl ketone, and
1.0-5.0% by weight of phenylbis(2,4,6- trimethylbenzoyl)phosphine oxide;
(b) applying a layer of adhesive composition to the underside contact surface of an artificial nail tip;
(c) gradually pressing the artificial nail tip onto the top surface of the fingernail, from the base to the tip of the artificial nail tip, to ensure a tight seal and to prevent air bubbles;
(d) continuing to press the artificial nail tip onto the top surface of the fingernail while applying UV or LED light to the artificial nail tip;
(e) after removal of pressure, applying UV or LED light to the artificial nail tip for a length of time sufficient to completely cure and harden the adhesive composition and form a bonding layer between the artificial nail tip and the fingernail;
wherein the bonding layer affixes the artificial nail tip to the surface of the fingernail for at least two weeks.

### Claim 2 (depends on 1)

The method of claim 1, wherein the length of time to completely cure and harden the adhesive composition is about 30 seconds to about 2 minutes.

### Claim 3 (depends on 1)

The method of claim 1 further comprising a step of filing the underside contact surface of the artificial nail tip with a nail filing device to form a rough affixing surface, before applying the adhesive composition in step (b).

### Claim 4 (depends on 3)

The method of claim 3, wherein the rough affixing surface formed on the underside of the artificial nail tip has multiple small, indented grooves thereon.

### Claim 5 (depends on 1)

The method of claim 1 further comprising the steps:
(i) applying a pH bonder to the top surface of the fingernail to form a pH bonder layer;
(ii) air drying the pH bonder layer;
(ii) applying a non-acidic gel primer layer on top of said pH bonder layer;
(iv) air drying the non-acidic gel primer layer;
wherein the pH bonder and non-acidic gel primer layers are applied to the fingernail prior to application of the adhesive composition in step (a).

### Claim 6 (depends on 4)

The method of claim 4 further comprising the steps:
(i) applying a pH bonder to the top surface of a fingernail to form a pH bonder layer;
(ii) air drying the pH bonder layer;
(ii) applying a non-acidic gel primer layer on top of said pH bonder layer;
(iv) air drying the non-acidic gel primer layer;
wherein the pH bonder and non-acidic gel primer layers are applied to the top surface of the fingernail prior to application of the adhesive composition in step (a).

### Claim 7 (depends on 5)

The method of claim 5 further comprising the step:
(f) applying a top coat composition to the artificial nail tip, wherein the top coat composition consists essentially of:
35.0-50.0% by weight of polyurethane acrylate oligomers;
15.0-30.0% by weight of 2-hydroxyethyl methacrylate (HEMA);
10.0-25.0% by weight of di-trimethylolpropane tetraacrylate;
5.0-10.0% by weight of pentaerythritol tetra(3-mercaptopropionate) (PETMP); and
0.0-1.0% by weight of polyether-modified polysiloxane.

### Claim 8 (depends on 6)

The method of claim 6 further comprising the step:
(f) applying a top coat composition to the artificial nail tip, wherein the top coat composition consists essentially of:
35.0-50.0% by weight of polyurethane acrylate oligomers;
15.0-30.0% by weight of 2-hydroxyethyl methacrylate (HEMA);
10.0-25.0% by weight of di-trimethylolpropane tetraacrylate;
5.0-10.0% by weight of pentaerythritol tetra(3-mercaptopropionate) (PETMP); and
0.0-1.0% by weight of polyether-modified polysiloxane.