US 12,215,245 B2
Aqueous coating composition
Zhen Qian, Shanghai (CN); Wei Cui, Shanghai (CN); and Jianming Xu, Shanghai (CN)
Assigned to Midland Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
Appl. No. 17/417,937
Filed by Rohm and Haas Company, Collegeville, PA (US); and Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Jan. 29, 2019, PCT No. PCT/CN2019/073676
§ 371(c)(1), (2) Date Jun. 24, 2021,
PCT Pub. No. WO2020/154888, PCT Pub. Date Aug. 6, 2020.
Prior Publication US 2022/0089897 A1, Mar. 24, 2022
Int. Cl. C09D 133/02 (2006.01); C08L 91/06 (2006.01); C09D 143/02 (2006.01); C09D 191/06 (2006.01)
CPC C09D 133/02 (2013.01) [C08L 91/06 (2013.01); C09D 143/02 (2013.01); C09D 191/06 (2013.01)] 10 Claims
 
1. An aqueous dispersion comprising:
(A) an emulsion polymer with a Tg of −45° C. or more comprising, by weight based on the dry weight of the emulsion polymer,
from 1.0% to 2.0% of structural units of a polymerizable surfactant having the structural formula:

OG Complex Work Unit Chemistry
the structural formula:

OG Complex Work Unit Chemistry
wherein:
m1 is 1, 2, or 3;
n is 2 to 50; and
M is Li+, Na+, K+, or +NH4;
from 1% to 5% of structural units of methacrylic acid, phosphoethyl methacrylate, or a mixture thereof;
from 5% to 25% of structural units of a C10-C20-alkyl ester of (meth)acrylic acid; and
from 67 to 93.5% of structural units of at least one of styrene, 2-ethylhexyl acrylate, or methyl methacrylate; and
(B) from 1.5% to 20% by solids weight of a wax, based on the dry weight of the emulsion polymer.