	US 11,981,830 B2
	Aqueous dispersion of polymer particles, microspheres, and polysiloxane particles
James C. Bohling, Lansdale, PA (US); Ibrahim Eryazici, Phoenixville, PA (US); Bradley K. Hageman, Pottstown, PA (US); Philip R. Harsh, Birdsboro, PA (US); Yihan Liu, Midland, MI (US); Partha S. Majumdar, Harleysville, PA (US); Edwin A. Nungesser, Horsham, PA (US); and Timothy A. Roggow, II, Chesaning, MI (US)
Assigned to Rohm and Haas Company, Collegeville, PA (US); and Dow Silicones Corporation, Midland, MI (US)
Appl. No. 17/283,620
Filed by Rohm and Haas Company, Collegeville, PA (US); and Dow Silicones Corporation, Midland, MI (US)
PCT Filed Oct. 22, 2019, PCT No. PCT/US2019/057380 § 371(c)(1), (2) Date Apr. 8, 2021, PCT Pub. No. WO2020/086545, PCT Pub. Date Apr. 30, 2020.
Claims priority of provisional application 62/749,788, filed on Oct. 24, 2018.
Prior Publication US 2021/0348005 A1, Nov. 11, 2021
Int. Cl. C09D 7/42 (2018.01); C08F 220/14 (2006.01); C08F 220/18 (2006.01); C08F 220/40 (2006.01); C08F 230/02 (2006.01); C08F 265/06 (2006.01); C08G 77/12 (2006.01); C08K 3/22 (2006.01); C08L 75/04 (2006.01); C08L 83/06 (2006.01); C09D 5/02 (2006.01); C09D 7/40 (2018.01)

CPC C09D 7/42 (2018.01) [C08F 220/14 (2013.01); C08F 220/1802 (2020.02); C08F 220/1804 (2020.02); C08F 220/40 (2013.01); C08F 230/02 (2013.01); C08F 265/06 (2013.01); C08G 77/12 (2013.01); C08K 3/22 (2013.01); C08L 75/04 (2013.01); C08L 83/06 (2013.01); C09D 5/028 (2013.01); C09D 7/67 (2018.01); C09D 7/68 (2018.01); C09D 7/69 (2018.01); C09D 7/70 (2018.01); C08G 2150/00 (2013.01); C08K 2003/2241 (2013.01); C08K 2201/005 (2013.01); C08K 2201/011 (2013.01); C08L 2201/54 (2013.01); C08L 2205/18 (2013.01)]

10 Claims

1. A paint composition comprising an aqueous dispersion of:

a) polymer particles having a z-average particle size in the range of from 80 nm to 500 nm;

b) polymeric organic crosslinked microspheres having an average particle size in the range of from 1 μm to 20 μm;

c) polysiloxane particles having an average particle size in the range of from 1 μm to 30 μm;

d) a rheology modifier;

e) an opacifying white pigment having a refractive index of >1.9 at a pigment volume concentration in the range of from 1 to 30, with the proviso that when the pigment volume concentration of the opacifying white pigment is less than 10, the paint composition comprises a non-white colorant in the range of from 5 to 20 weight percent solids based on the weight of the paint composition; and

f) less than 10 weight percent, based on the weight of the polymer particles, of a polyurethane having a T_g<0° C.;

wherein the concentration of the polymer particles and the crosslinked microspheres is in the range of 10 to 65 weight percent, based on the weight of the paint composition;

wherein weight-to-weight ratio of polymer particles to crosslinked microspheres is in the range of 1.1:1 to 20:1; the concentration of polysiloxane particles is in the range from 0.05 to 5 weight percent, based on the weight of the paint composition; and the concentration of the rheology modifier is in the range of from 0.1 to 5 weight percent, based on the weight of the paint composition.