Waterborne wet look coating composition

Patent metadata

Field	Value
Publication number	US-10851025-B2
Application number	US-201715702993-A
Country	US
Kind code	B2
Filing date	Sep 13, 2017
Priority date	Mar 17, 2015
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A water-based coating composition is described herein. The composition includes an aqueous dispersion derived from an ethylenically unsaturated monomer and one or more organic solvents. The composition when applied to a substrate and allowed to dry provides a wet look to the substrate.

First claim

What is claimed is:

1. A coating composition for a cementitious substrate, comprising:
an aqueous dispersion comprising a polymer and an aqueous carrier, the polymer having a number average molecular weight greater than 5,000 and up to about 50,000, the polymer having a Tg of greater than 0° C., and the polymer derived from at least one ethylenically unsaturated monomer; and
a combination of two or more organic solvents comprising:
a first solvent having a boiling point between about 120° C. and 210° C.; and
a second solvent having a boiling point between about 210° C. and 300° C.,

wherein the polymer comprises about 40 to about 90 wt % of the total weight of the dispersion, not including the aqueous carrier, and the combination of the two or more organic solvents comprise about 10 to about 60 wt % of the coating composition based on the total weight of the dispersion, not including the aqueous carrier; and
wherein the coating composition, when applied to the cementitious substrate and allowed to dry, provides a wet look.

2. The composition of claim 1 , wherein the ethylenically unsaturated monomer is selected from acrylic acid, C 1 -C 22 esters of acrylic acid, substituted C 1 -C 22 esters of acrylic acid, methacrylic acid, C 1 -C 22 ester of methacrylic acid, substituted C 1 -C 22 esters of methacrylic acid, styrene, a-methyl styrene, acrylamide, N-substituted alkyl acrylamide, vinyl toluene, vinyl acetate, vinyl versatate, C 1 -C 22 vinyl esters, C 1 -C 22 esters of maleic acid, vinyl propionate, allyl methacrylate, and mixtures thereof.

3. The composition of claim 1 , wherein the ethylenically unsaturated monomer is selected from styrene, methyl methacrylate, 2-ethyl hexyl acrylate, methacrylic acid, and combinations thereof.

4. The composition of claim 1 , wherein the polymer is derived from a combination of methylmethacrylate, 2-ethyl hexyl acrylate and methacrylic acid.

5. The composition of claim 1 , wherein the polymer has Tg of about 10° C. to about 80° C.

6. The composition of claim 1 , wherein the first solvent has boiling point between 140° C. and 180° C.

7. The composition of claim 1 , wherein the second solvent has boiling point between 210° C. and 260° C.

8. The composition of claim 1 , wherein the polymer has number average molecular weight of about 15,000 to about 40,000.

9. The composition of claim 1 , wherein the polymer has number average molecular weight of about 10,000 to about 30,000.

10. The composition of claim 1 , wherein the combination of two or more organic solvents comprises about 10 to 50 wt % of the total weight of the dispersion, not including the aqueous carrier.

11. The composition of claim 1 , wherein the polymer comprises about 40 to 90 wt % of the total weight of the dispersion, not including the aqueous carrier.

12. The composition of claim 1 , wherein the dispersion comprises about 30 to 90 wt % water.

13. The composition of claim 1 , wherein the dispersion further comprises a crosslinker.

14. The composition of claim 1 , wherein the cementitious substrate includes a first coating applied thereon prior to the application of the coating composition.

15. The composition of claim 1 , wherein the polymer is manufactured by a solution polymerization method.

16. The composition of claim 1 , wherein the polymer is manufactured by a bulk polymerization method.

17. The composition of claim 1 , wherein the polymer is manufactured by a dispersion polymerization method.

18. The composition of claim 1 , wherein the polymer is manufactured by a latex polymerization method.

19. The composition of claim 1 , wherein the dispersion is formed by emulsifying a solvated polymer into water.

20. A method of coating a cementitious substrate, comprising:
applying on the cementitious substrate a coating composition comprising:
an aqueous dispersion of a polymer and an aqueous carrier, the polymer having a number average molecular weight greater than 5,000 and up to about 50,000 and a Tg of greater than 0° C. and derived from at least one ethylenically unsaturated monomer;
a combination of two or more organic solvents comprising:
a first solvent having a boiling point between about 120° C. and 210° C.; and
a second solvent having a boiling point between about 210° C. and 300° C.,

wherein the polymer comprises about 40 to about 90 wt % of the total weight of the dispersion, not including the aqueous carrier, and the combination of the two or more organic solvents comprise about 10 to about 60 wt % of the coating composition based on the total weight of the dispersion, not including the aqueous carrier; and

allowing water to evaporate from the substrate to provide a coating with a wet look.

21. A coating composition for a cementitious substrate, comprising:
an aqueous dispersion comprising a latex polymer and an aqueous carrier, the latex polymer having a number average molecular weight greater than 5,000 and up to about 50,000, the latex polymer having a Tg of greater than 0° C., and the latex polymer derived from at least one ethylenically unsaturated monomer; and
a combination of two or more organic solvents comprising:
a first solvent having a boiling point between about 120° C. and 210° C.; and
a second solvent having a boiling point between about 210° C. and 300° C.,

wherein the latex polymer comprises about 40 to about 90 wt % of the total weight of the dispersion, not including the aqueous carrier, and the combination of the two or more organic solvents comprise about 10 to about 60 wt % of the coating composition based on the total weight of the dispersion, not including the aqueous carrier; and
wherein the coating composition is devoid of a colorant or pigment, such that when the coating composition is applied to the cementitious substrate and allowed to dry, provides a clear wet look.

Assignees

• Swimc Llc

Inventors

• Crenshaw Brent
• Sara Stacey
• Frazee Glenn

Classifications

• C04B41/63

  Macromolecular compounds · CPC title

• C09D133/12

  Homopolymers or copolymers of methyl methacrylate · CPC title

• C04B41/483 Primary

  Polyacrylates · CPC title

• C04B41/4876

  Polystyrene · CPC title

• C04B41/009

  characterised by the material treated · CPC title