Color changing paint and varnish remover

• US 20070129276A1
• Filed: 01/31/2007
• Published: 06/07/2007
• Est. Priority Date: 11/17/2005
• Status: Active Grant

• Current Assignee: Dynacraft Industries, Inc.
• Original Assignee: Dynacraft Industries, Inc.
• Inventors: Cohen, Daniel, Newman, Noel, Albright, Robert
• Granted Patent: US 8,383,565 B2
• Time in Patent Office: Days
• US Class Current: 510/201
• CPC Class Codes: C09D 9/005 containing organic solvents

Abstract

A color change paint and varnish removal formulation is provided. The formulation comprises: at least one penetrant, at least one water insoluble carrier and at least one color visible colorant whereby the formulation is applied to the target area and as the surface of the formulation dries, the penetrant migrates away from the dehydrating surface and a surface crust of beads is formed; the beads have a particle size that allows the scattering of visible light into white light and produces the whitening and dilution of the visible color and thus, there is a color change to indicate that the stripping action of the formulation has ceased and is ready for the scraping and removal step.

Claims

1. A paint removal formulation having a color change feature to indicate when the formulation is ready for removal, said formulation comprising:

at least one penetrant, at least one water insoluble carrier and at least one color visible colorant, said penetrant is selected from a group consisting of dimethyl adipate, dimethyl glutarate, dimethyl succinate, butyl alcohol, ethyl alcohol, isopropyl alcohol, tertiary butyl alcohol, methyl alcohol, di-iso butyl ketone, methyl amyl ketone, butyl acetate, tertiary butyl acetate, isobutyl iso-butyrate, diethyl ether, ethylene glycol methyl ether, ethylene glycol butyl ether, turpentine distilled steam, aromatic hydrocarbon, cyclohexanone, isophrone, heptane, hexane, kerosene, lacquer diluents, rubber solvent, benzene, chlorobenzene, cyclohexanol, monoethanolamine and mixtures thereof, and said water insoluble carrier is selected from a group consisting of polysaccharides, starch, cellulose, polydextran, chitosan, chitin, limestone, metal oxides, aluminum silicates, hydrated aluminates, sodium magnesium silicates, barium sulphates, ferroxides, magnesium aluminum silicates and mixtures thereof; and

whereby said formulation is designed to be applied to a target area and as the surface of said formulation dries, said penetrant migrates away from a surface of said formulation carrying the visible color and thereby creating a color change to indicate that said formulation with the stripped paint is ready for removal.

2. The formulation of claim 1 wherein the drying of the formulation and the migration of the penetrant produces a surface crust of beads, said beads having a particle size that scatter visible light into white light and produces the whitening and dilution of the visible color.

3. The formulation of claim 2 wherein said carrier partially dehydrates emitting white light as the surface of said formulation dries.

4. The formulation of claim 2 wherein the particle of said beads is from about 200 to about 2,000 namometers.

5. The formulation of claim 4 wherein said formulation comprises from about 5 to about 55% by weight of said penetrant, from about 2 to about 50% by weight of said carrier, from about 0.01 to about 2.0% by weight of said colorant and from about 15 to about 50% by weight of said water.

6. The formulation of claim 1 further comprises at least one thickening agent, said thickening agent being selected from a group consisting of Fullers earth, clay, attapulgite, montmorillonite, magnasol, klucel H, hydroxyethyl cellulose, hydroxypropyl cellulose, methocel and mixtures thereof.

7. The formulation of claim 1 further comprises at least one wetting agent, said wetting agent being selected from a group consisting of propylene glycol, butylene glycol, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, pentaethylene glycol, diethylene glycol monomethyl ether, monomethyl ethers of triethylene glycol, tetraethylene glycol, pentaerythritol, dipentaerythritol, neopentyl glycol and mixtures thereof.

8. The formulation of claim 1 further comprises at least one activator, said activator being selected from a group consisting of formic acid, acetic acid, glycolic acid, hydroxyacetic acid, chloroacetic acid, fluoroacetic acid, oxalic acid, lactic acid and mixtures thereof.

9. The formulation of claim 1 wherein said formaulation has a viscosity from about 1200 cps to about 4500 cps.

10. The formulation of claim 1 wherein said formulation is a semi-solid.

11. A colored paint removal product with a color changing feature, said product comprises:

at least one penetrant, at least one water insoluble carrier, and at least one color visible colorant whereby the product is applied to the target area and as the surface of product dries, said carrier partially dehydrates emitting white light as said colorant migrates away from the dehydrating surface and the product becomes paler than its original color to indicate that the stripping action of said product has ceased and is ready for the removal step, said product having a viscosity from about 1200 cps to about 4500 cps; and

whereby the product is designed to be applied to the target area and as the surface of product dries, said colorant migrates away from the dehydrating surface and the drying of the product and the migration of the penetrant forms a surface crust of beads, said beads having a particle size from about 200 to about 2,000 nanometers, said particle size allows for scattering of visible light into white light thereby causing the product to change color to indicate that said product with the paint is ready for the removal step.

12. The product of claim 11 wherein said product is a semi-solid and said color change is based on the product losing color.

13. The product of claim 11 wherein said penetrant is selected from a group consisting of NMP, benzyl alcohol, ethyl lactate, diethyl adipate, diethyl glutarate, ethyl benzoate, dimethyl succinate, diethyl succinate, dimethyl phthalate, diethyl phthalate, dimethyl terphthalate, diethyl terphthalate, ethylene bis(lactate), dimethyl sulfoxide, soy solvents, D-limonene, methylene chloride, toluene, methyl ethyl ketone, acetone, methanol, xylenes, mineral spirits, hi-flash naptha, dimethyl adipate, dimethyl glutarate, dimethyl succinate,butyl alcohol, ethyl alcohol, isopropyl alcohol, tertiary butyl alcohol, methyl alcohol, di-iso butyl ketone, methyl amyl ketone, butyl acetate, tertiary butyl acetate, isobutyl iso-butyrate, diethyl ether, ethylene glycol methyl ether, ethylene glycol butyl ether, turpentine, aromatic hydrocarbon, cyclohexanone, isophrone, heptane, hexane, kerosene, lacquer diluents, rubber solvent, benzene, chlorobenzene, cyclohexanol, monoethanolamine and mixtures thereof.

14. The product of claim 11 wherein said carrier is selected from a group consisting of polysaccharides, starch, cellulose, polydextran, chitosan, chitin, limestone, metal oxides, aluminum silicates, hydrated aluminates, sodium magnesium silicates, barium sulphates, ferroxides, magnesium aluminum silicates and mixtures thereof.

15. The product of claim 11 wherein said colorant is selected from a group consisting of dye, pigments and mixtures thereof.

16. The product of claim 11 further comprises water.

17. The product of claim 16 wherein said formulation comprises from about 5 to about 55% by weight of said penetrant, from about 2 to about 50% by weight of said carrier, from about 0.01 to about 2.0% by weight of said colorant and from about 15 to about 50% by weight of said water.

18. The product of claim 11 further comprises at least one thickening agent, said thickening agent being selected from a group consisting of Fullers earth, clay, attapulgite, montmorillonite, magnasol, klucel H, hydroxyethyl cellulose, hydroxypropyl cellulose, methocel and mixtures thereof, said product further comprises at least one wetting agent, said wetting agent being selected from a group consisting of propylene glycol, butylene glycol, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, pentaethylene glycol, diethylene glycol monomethyl ether, monomethyl ethers of triethylene glycol, tetraethylene glycol, pentaerythritol, dipentaerythritol, neopentyl glycol and mixtures thereof, said product, further comprises at least one activator, said activator being selected from a group consisting of formic acid, acetic acid, glycolic acid, hydroxyacetic acid, chloroacetic acid, fluoroacetic acid, oxalic acid, lactic acid and mixtures thereof.

19. A method of manufacturing a paint removal composition with a color change feature, said method comprising admixing at least one penetrant, at least one water insoluble carrier, and at least one color visible colorant, said penetrant is selected from a group consisting of NMP, benzyl alcohol, ethyl lactate, diethyl adipate, diethyl glutarate, ethyl benzoate, dimethyl succinate, diethyl succinate, dimethyl phthalate, diethyl phthalate, dimethyl terphthalate, diethyl terphthalate, ethylene bis(lactate), dimethyl sulfoxide, soy solvents, D-limonene, methylene chloride, toluene, methyl ethyl ketone, acetone, methanol, xylenes, mineral spirits, hi-flash naptha, dimethyl adipate, dimethyl glutarate, dimethyl succinate, butyl alcohol, ethyl alcohol, isopropyl alcohol, tertiary butyl alcohol, methyl alcohol, di-iso butyl ketone, methyl amyl ketone, butyl acetate, tertiary butyl acetate, isobutyl iso-butyrate, diethyl ether, ethylene glycol methyl ether, ethylene glycol butyl ether, turpentine, aromatic hydrocarbon, cyclohexanone, isophrone, heptane, hexane, kerosene, lacquer diluents, rubber solvent, benzene, chlorobenzene, cyclohexanol, monoethanolamine and mixtures thereof, and said carrier is selected from a group consisting of polysaccharides, starch, cellulose, polydextran, chitosan, chitin, limestone, metal oxides, aluminum silicates, hydrated aluminates, sodium magnesium silicates, barium sulphates, ferroxides, magnesium aluminum silicates and mixtures thereof, said composition having a viscosity from about 1200 cps to about 4500 cps;

and whereby said composition is designed to be applied to a target area and said composition changes color when said composition with the stripped paint is ready for scraping and removal.

20. The method of claim 19 wherein said composition is a semi-solid, said composition being safe for short term human skin contact.