US 11,945,902 B2
Two-component polyurethane composition
Daoshu Lin, Shanghai (CN); Baoqing Zheng, Shanghai (CN); Jia Tang, Shanghai (CN); Dong Yun, Shanghai (CN); Shujun Shu, Shanghai (CN); and Gary W. Dombrowski, Chester Springs, PA (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
Appl. No. 17/265,328
Filed by Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
PCT Filed Sep. 21, 2018, PCT No. PCT/CN2018/106964
§ 371(c)(1), (2) Date Feb. 2, 2021,
PCT Pub. No. WO2020/056727, PCT Pub. Date Mar. 26, 2020.
Prior Publication US 2021/0309791 A1, Oct. 7, 2021
Int. Cl. C08G 18/67 (2006.01); C08G 18/73 (2006.01); C08L 43/02 (2006.01); C08L 75/04 (2006.01); C09D 133/14 (2006.01); C09D 143/02 (2006.01); C09D 175/04 (2006.01); C09D 175/14 (2006.01); C09D 175/16 (2006.01); C09K 23/00 (2022.01); C09K 23/02 (2022.01); C09K 23/14 (2022.01); C09K 23/16 (2022.01)
CPC C08G 18/6785 (2013.01) [C08G 18/67 (2013.01); C08G 18/73 (2013.01); C08L 43/02 (2013.01); C08L 75/04 (2013.01); C09D 133/14 (2013.01); C09D 143/02 (2013.01); C09D 175/04 (2013.01); C09D 175/14 (2013.01); C09D 175/16 (2013.01); C09K 23/00 (2022.01); C09K 23/017 (2022.01); C09K 23/02 (2022.01); C09K 23/16 (2022.01); C09K 23/14 (2022.01)] 15 Claims
 
1. A two-component polyurethane composition comprising,
(A) an aqueous dispersion comprising an emulsion polymer and a surfactant selected from the group consisting of a sulphate surfactant, a sulfonate surfactant containing no carboxyl or carboxylate group, or mixtures thereof; wherein the emulsion polymer with a weight average molecular weight of 70,000 g/mol or less comprises, by weight based on the weight of the emulsion polymer,
greater than 0.25% of structural units of a phosphorous-containing acid monomer and/or a salt thereof, greater than 15% of structural units of a hydroxy-functional alkyl (meth)acrylate, structural units of a monoethylenically unsaturated nonionic monomer, and from zero to 10% of structural units of an additional acid monomer and/or a salt thereof; and
(B) a water-dispersible polyisocyanate.