US 12,071,560 B2
Coating composition for pourous construction materials
Beatriz C. Ma, Schierstein (DE); Jean-Paul Lecomte, Seneffe (BE); Jouko Vyoerykkae, Horgen (CH); and Sabrina Salvati, Seneffe (BE)
Assigned to Dow Global Technologies LLC, Midland, MI (US); and Dow Silicones Corporation, Auburn, MI (US)
Appl. No. 17/280,006
Filed by Dow Global Technologies LLC, Midland, MI (US); and Dow Silicones Corporation, Auburn, MI (US)
PCT Filed Sep. 23, 2019, PCT No. PCT/US2019/052408
§ 371(c)(1), (2) Date Mar. 25, 2021,
PCT Pub. No. WO2020/068655, PCT Pub. Date Apr. 2, 2020.
Claims priority of provisional application 62/890,350, filed on Aug. 22, 2019.
Claims priority of provisional application 62/737,577, filed on Sep. 27, 2018.
Prior Publication US 2021/0395557 A1, Dec. 23, 2021
Int. Cl. C09D 133/08 (2006.01); C09D 7/20 (2018.01); C09D 7/63 (2018.01); C09D 133/12 (2006.01); C08K 5/5415 (2006.01)
CPC C09D 133/08 (2013.01) [C09D 7/20 (2018.01); C09D 7/63 (2018.01); C09D 133/12 (2013.01); C08K 5/5415 (2013.01)] 20 Claims
 
1. An aqueous coating composition for porous construction materials, comprising:
3.5 to 95 weight percent (wt. %) of a binder, the binder comprising by dry weight based on the total dry weight of the binder:
90 wt. % to 97 wt. % of an acrylic polymer in an acrylic polymer waterborne dispersion, wherein the acrylic polymer has a glass transition temperature (Tg) of 1° C. to 60° C.; and
10 wt. % to 3 wt. % of an alkoxy silane coalescing agent in a waterborne silane coalescing emulsion; and
96.5 to 5 wt. % of an additive selected from the group consisting of a pigment, a filler and combinations thereof, the wt. % of the binder and the additive are based on the total dry weight of the aqueous coating composition.