	US 12,466,945 B2
	Aqueous dispersion of occluded polymer particles
James C. Bohling, Lansdale, PA (US); Wei Gao, Fort Washington, PA (US); Justin Gimbal, Warminster, PA (US); and Ian D. Robertson, Collegeville, PA (US)
Assigned to Rohm and Haas Company, Collegeville, PA (US); and Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/784,345
Filed by Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
PCT Filed Nov. 19, 2020, PCT No. PCT/US2020/061226 § 371(c)(1), (2) Date Jun. 10, 2022, PCT Pub. No. WO2021/126453, PCT Pub. Date Jun. 24, 2021.
Claims priority of provisional application 62/949,470, filed on Dec. 18, 2019.
Prior Publication US 2023/0058018 A1, Feb. 23, 2023
Int. Cl. C08L 33/08 (2006.01); C09D 133/08 (2006.01)

CPC C08L 33/08 (2013.01) [C09D 133/08 (2013.01)]

9 Claims

1. A composition comprising an aqueous dispersion of multiphase polymer particles comprising, based on the weight of the polymer particles, from greater than 80 to less than 95 weight percent of first polymer particles having a T_gof less than 30° C., and from greater than 5 to less than 20 weight percent of second polymer particles having a T_gin the range of from 90° C. to 110° C., wherein the second polymer particles are phase separated from and occluded within the first polymer particles; wherein the number average molecular weight (M_n) of the multiphase polymer particles is in the range of from 9,000 to 25,000 g/mole; and wherein the second polymer particles comprise at least 90 weight percent methyl methacrylate, based on the weight of the second polymer particles.