US 12,338,364 B2
Method for applying a coating composition to a substrate
Eric C. Greyson, Blue Bell, PA (US); Joy A. Gallagher, Eagleville, PA (US); and Richard Cooper, Schwenksville, PA (US)
Assigned to Rohm and Haas Company, Collegeville, PA (US); and Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 18/860,253
Filed by Rohm and Haas Company, Collegeville, PA (US); and Dow Global Technologies LLC, Midland, MI (US)
PCT Filed May 20, 2022, PCT No. PCT/US2022/030166
§ 371(c)(1), (2) Date Oct. 25, 2024,
PCT Pub. No. WO2023/224630, PCT Pub. Date Nov. 23, 2023.
Prior Publication US 2025/0109301 A1, Apr. 3, 2025
Int. Cl. C09D 5/02 (2006.01); C09D 5/33 (2006.01); C09D 7/61 (2018.01); C09D 7/65 (2018.01); C09D 133/06 (2006.01); E01F 9/518 (2016.01)
CPC C09D 5/022 (2013.01) [C09D 5/004 (2013.01); C09D 5/028 (2013.01); C09D 7/61 (2018.01); C09D 7/65 (2018.01); C09D 133/064 (2013.01); E01F 9/518 (2016.02)] 17 Claims
 
1. A method comprising the steps of a) applying a 0.1-mm to 2-mm thick layer of a pigmented coating composition onto a cement, concrete, or asphalt substrate, and b) allowing the coating composition to dry;
wherein the pigmented coating composition comprises an aqueous dispersion of 1) first polymer particles having a calculated Tg in the range of from −25° C. to 50° C.; 2) second polymer particles having a calculated Tg in the range of from 30° C. to 110° C.; 3) extender particles; 4) pigment particles; and 5) a base which is ammonia or a volatile amine or a salt thereof;
with the proviso that the second polymer particles have a Tg of at least 20° C. higher than the first polymer particles, wherein, based on the weight of the composition:
the first and second polymer particles together have a solids content in the range of from 10 to 20 weight percent;
the extender particles have a solids content in the range of from 45 to 70 weight percent;
the pigment particles have a solids content in the range of from 3 to 15 weight percent; and
the composition has a total solids content in the range of from 60 to 85 weight percent;
wherein the w/w ratio of the first polymer particles to the second polymer particles is in the range of from 30:70 to 90:10;
wherein the first and second polymer particles consist of acrylic or styrene-acrylic polymer particles.