# US 9,434,843 B1 · One-part dry erase paint

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- Number: US 9,434,843 B1
- Document ID: US9434843B1
- Status: Granted
- Kind: B1
- Application number: 13/623,685
- Filed: 2012-09-20
- Granted: 2016-09-06
- Earliest claimed: 2011-09-20
- Applicants: Michael Heiman
- Inventors: Michael Heiman
- Web page: https://patentgrep.com/patent/US9434843B1

## CPC

- B43L 1/002: {chemical details}
- B43L 1/00: Repeatedly-usable boards or tablets for writing or drawing (drawing-boards B43L5/00)
- B43L 1/10: Writing surfaces thereof
- C09D 5/008: {Temporary coatings (C09D5/20 takes precedence)}
- B43L: ARTICLES FOR WRITING OR DRAWING UPON; {WRITING OR DRAWING AIDS;} ACCESSORIES FOR WRITING OR DRAWING (workshop equipment for marking-out work B25H7/00; teaching hand-writing or drawing G09B11/00)
- 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)

## Abstract

One-pot, dry erasable paints are provided. The dry erasable paints can be used to prepare dry erase coatings on virtually any type of substrate surface. The paints comprise a base component comprising monomers, oligomers, and/or polymers of a diisocyanate mixed with an admix component comprising a solvent. The paints are cured in a time of less than about 12 hours under ambient conditions, and once cured are markable-erasable with numerous writing and marking instruments, including temporary and permanent markers, paint, crayons, ink, and the like.

## Claims

### Claim 1

A method of producing a dry erasable surface, said method comprising:
providing a one-pot, dry erase paint comprising a base component and an admix component mixed with the base component, said base component comprising monomers, oligomers, and/or polymers of a diisocyanate, said admix component comprising a solvent, wherein said paint comprises a total solids content of greater than about 53% by weight and less than about 100% by weight;
providing a substrate having a surface;
forming a coating of said paint mixture adjacent said substrate surface; and
allowing said coating to dry under ambient conditions and without the use of UV curing, wherein said coating has a surface, said coating surface being markable-erasable.

### Claim 2 (depends on 1)

The method of claim 1, said solvent being selected from the group consisting of acetone, parachlorobenzotrifluoride, t-butyl acetate, propylene carbonate, volatile methyl siloxanes, methylene chloride, and mixtures thereof.

### Claim 3 (depends on 1)

The method of claim 1, said solvent being selected from the group consisting of water, glycol ethers, tripropylene n-butyl ether, and mixtures thereof.

### Claim 4 (depends on 1)

The method of claim 1, said diisocyanate being selected from the group consisting of hexamethylene diisocyanate, hexane diisocyanate, toluene diisocyanate, methylene diphenyl diisocyanate, isophorone diisocyanate, and mixtures thereof.

### Claim 5 (depends on 1)

The method of claim 1, wherein said substrate is selected from the group consisting of wood, plexiglass, dry wall, painted surfaces, plastic, glass, melamine coatings, metal, slate, porcelain, ceramic, enameled surfaces, and composite.

### Claim 6 (depends on 1)

The method of claim 1, wherein said coating is formed by rolling, brushing, spraying, dipping, pouring, dragging, or pulling the composition onto or over the substrate surface.

### Claim 7 (depends on 1)

The method of claim 1, wherein said substrate surface is not sanded or primed prior to said forming.

### Claim 8 (depends on 1)

The method of claim 1, wherein said dry erase paint is substantially free of epoxies and/or photoinitiators.

### Claim 9 (depends on 1)

The method of claim 1, wherein said coating is markable-erasable less than about 12 hours after said forming.

### Claim 10 (depends on 1)

The method of claim 1, wherein said coating is substantially transparent.

### Claim 11 (depends on 1)

The method of claim 1, wherein said coating further comprises a pigment or a dye.

### Claim 12 (depends on 1)

The method of claim 1, wherein said coating is markable-erasable with dry erase markers, dry erase pens, permanent markers, crayons, highlighter markers, washable markers, regular markers, glues, spray paints, make-up, pencils, grease pencils, grease pens, finger paints, and adhesives without a solvent or cleaner.

### Claim 13 (depends on 1)

The method according to claim 1, said paint having a shelf-life of at least about 12 months when stored in a sealed container prior to said forming step.