US 12,134,666 B2
Aqueous dispersion and aqueous coating composition
Jianming Xu, Shanghai (CN); Wei Cui, Shanghai (CN); Yunfei Lan, Shanghai (CN); Qingwei Zhang, Shanghai (CN); and Han Lv, Shanghai (CN)
Assigned to Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Midland, MI (US)
Appl. No. 17/271,382
Filed by Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
PCT Filed Oct. 24, 2018, PCT No. PCT/CN2018/111588
§ 371(c)(1), (2) Date Feb. 25, 2021,
PCT Pub. No. WO2020/082257, PCT Pub. Date Apr. 30, 2020.
Prior Publication US 2021/0324114 A1, Oct. 21, 2021
Int. Cl. C08F 220/18 (2006.01); C08F 2/22 (2006.01); C08F 220/06 (2006.01); C08F 220/28 (2006.01); C08K 5/5425 (2006.01); C08K 5/5435 (2006.01); C09D 133/08 (2006.01)
CPC C08F 2/22 (2013.01) [C08F 220/06 (2013.01); C08F 220/1802 (2020.02); C08F 220/1812 (2020.02); C08F 220/283 (2020.02); C08K 5/5425 (2013.01); C08K 5/5435 (2013.01); C09D 133/08 (2013.01); C08L 2201/54 (2013.01)] 7 Claims
 
1. An aqueous dispersion, comprising, by weight based on the weight of the emulsion polymer,
from 39.5 to 53.5% of structural units of a soft alkyl (meth)acrylate with a biobased content more than 30% to 60%, wherein the soft alkyl (meth)acrylate is ethyl acrylate;
from 10% to 20% of structural units of a C12-C16-alkyl (meth)acrylate with a biobased content greater than 60%, wherein the C12-C16-alkyl (meth)acrylate comprises 62-78% of lauryl methacrylate, 22-38% of tetradecyl methacrylate, and 0 to 10% of hexadecyl methacrylate;
from 1.5% to 2% of structural units of ethylenically unsaturated monomer carrying at least one functional group, wherein the ethylenically unsaturated monomer carrying at least one functional group is selected from methacrylic acid, sodium styrene sulfonate, or a mixture thereof;
from 2% to 6% of structural units of acetoacetoxy alkyl methacrylate which is acetoacetoxy ethyl methacrylate;
from 29% to 36% of structural units of hard monomer which is methyl methacrylate;
from zero to 0.4% of structural units of (meth)acryl functional silane which is 3-(trimethoxysilyl)propyl methacrylate, or y-glycidoxypropyltrimethoxysilane or mixtures thereof;
from 0.2% to 0.8% of an epoxy functional silane, by weight based on the weight of emulsion polymer;
wherein the epoxy functional silane and structural units of (meth)acryl functional silane is present in a combined amount of from 0.2% to 1%, by weight based on the weight of the emulsion polymer; and
wherein total stain removal score is at least 60 using the GB/T 9780-2013 method.