Waterborne coating composition

Patent metadata

Field	Value
Publication number	US-2019077973-A1
Application number	US-201816114715-A
Country	US
Kind code	A1
Filing date	Aug 28, 2018
Priority date	Sep 13, 2017
Publication date	Mar 14, 2019
Grant date	—

Abstract

A waterborne coating composition including: an aqueous emulsion polymer having a copolymerized Phosphorous-acid monomer, an aqueous dispersion of cement, and a solid inert filler, each in certain amounts, is provided. A method for providing a coated substrate employing the waterborne coating composition that has been subsequently activated and the coated substrate so formed are also provided.

First claim

What is claimed is:

1 . A waterborne coating composition comprising:
(a) an aqueous emulsion polymer, said emulsion polymer comprising, as copolymerized units from 0.1% to 10% Phosphorous-acid monomer, based on the dry weight of said emulsion polymer; said emulsion polymer in an amount of from 8% to 30% by weight on a dry basis; (b) an aqueous dispersion of cement, said aqueous dispersion having a cement solids content of from 50% to 80% by weight, said cement selected from the group consisting of aluminous cement, sulfoaluminous cement, and mixtures thereof, said cement in an amount of from 10% to 30% by weight on a dry basis; and (c) solid inert filler in an amount of from 40% to 82% by weight on a dry basis; wherein said emulsion polymer/said cement ratio is from 0.66 to 1.5 on a dry/dry basis; and wherein the water/said cement ratio is from 0.6 to 2.0 on a dry cement basis.

2 . The waterborne coating composition of claim 1 wherein said emulsion polymer comprises, as copolymerized units from 1% to 5% Phosphorous-acid monomer, based on the dry weight of said aqueous emulsion polymer.

3 . The waterborne coating composition of claim 1 wherein said emulsion polymer is in an amount of from 10-17% by weight on a dry basis; wherein said aqueous dispersion of cement is in an amount of from 10% to 20% by weight on a dry basis; and wherein solid filler is in an amount of from 63% to 80% by weight on a dry basis.

4 . The waterborne coating composition of claim 1 wherein said emulsion polymer/said cement ratio if from 0.7 to 1.25 on a dry/dry basis.

5 . A method for providing a coated substrate comprising:
(a) providing a solid substrate surface; (b) applying thereon an activated waterborne composition comprising (i) a waterborne coating composition comprising (aa) an aqueous emulsion polymer, said emulsion polymer comprising, as copolymerized units from 0.1% to 10% Phosphorous-acid monomer, based on the dry weight of said emulsion polymer; said emulsion polymer in an amount of from 8% to 30% by weight on a dry basis; (bb) an aqueous dispersion of cement, said aqueous dispersion having a cement solids content of from 50% to 80% by weight, said cement selected from the group consisting of aluminous cement, sulfoaluminous cement, and mixtures thereof, said cement in an amount of from 10% to 30% by weight on a dry basis; and (cc) solid inert filler in an amount of from 40% to 82% by weight on a dry basis; wherein said emulsion polymer/said cement ratio is from 0.66 to 1.5 on a dry/dry basis; and wherein water/said cement ratio is from 0.6 to 2.0 on a dry cement basis; wherein the pH of said waterborne coating composition has been adjusted to a pH>11; and (ii) an aqueous activator solution comprising from 0.4% to 0.8% of a metal salt selected from the group consisting of sodium, potassium, magnesium and calcium salts, by weight of metal based on dry weight of said cement; and (d) drying said activated waterborne coating composition.

6 . The method for providing a coated substrate of claim 5 wherein said emulsion polymer comprises, as copolymerized units from 1% to 5% Phosphorous-acid monomer, based on the dry weight of said aqueous emulsion polymer.

7 . The method for providing a coated substrate of claim 5 wherein said emulsion polymer is in an amount of from 10% to17% by weight on a dry basis; wherein said aqueous dispersion of cement is in an amount of from 10% to 20% by weight on a dry basis; and wherein solid filler is in an amount of from 63% to 80% by weight on a dry basis.

8 . The method for providing a coated substrate of claim 5 wherein said emulsion polymer/said cement ratio is from 0.7 to 1.25 on a dry/dry basis.

9 . A coated substrate formed by the method of claim 5 .

Assignees

• Dow Global Technologies Llc

Inventors

• Chailloux Loïc
• Haigh John
• Ressnig Debora
• Duc Daniel
• Bricout Xavier

Classifications

• C09D143/02 Primary

  Homopolymers or copolymers of monomers containing phosphorus · CPC title

• C04B2111/00482

  Coating or impregnation materials · CPC title

• C09D1/08 Primary

  with organic additives · CPC title

• C04B2103/0065

  Polymers characterised by their glass transition temperature (Tg) · CPC title

• C09D7/61

  inorganic · CPC title