US 10,889,721 B2
Water-based compositions with long term gloss retention
Robert W. Sandoval, Crystal Lake, IL (US); Matthew D. Andersson, Elgin, IL (US); T. Howard Killilea, North Oaks, MN (US); Mary Jane Hibben, Elburn, IL (US); Frank Cusimano, Marengo, IL (US); Tyler Bell, Naples, FL (US); and Michael C. Wildman, Hoffman Estates, IL (US)
Assigned to SWIMC LLC, Cleveland, OH (US)
Filed by SWIMC LLC, Cleveland, OH (US)
Filed on May 29, 2019, as Appl. No. 16/425,574.
Claims priority of provisional application 62/677,399, filed on May 29, 2018.
Prior Publication US 2019/0367740 A1, Dec. 5, 2019
Int. Cl. C08L 21/02 (2006.01); C09D 7/48 (2018.01); C09D 4/06 (2006.01); C08F 12/08 (2006.01); C08F 18/08 (2006.01); C08F 20/06 (2006.01); C08F 20/18 (2006.01); C08K 5/132 (2006.01); C08K 5/357 (2006.01); C08K 5/3435 (2006.01)
CPC C09D 4/06 (2013.01) [C08F 12/08 (2013.01); C08F 18/08 (2013.01); C08F 20/06 (2013.01); C08F 20/18 (2013.01); C09D 7/48 (2018.01); C08K 5/132 (2013.01); C08K 5/3435 (2013.01); C08K 5/357 (2013.01); C08L 21/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An aqueous coating composition having an improved gloss retention, the coating composition comprising:
a latex polymer comprising at least one ethylenically unsaturated monomer dispersed in an aqueous medium;
one or more UV-VIS absorbers, wherein the one or more UV-VIS absorbers comprises a substituted benzophenone capable of being a free radical generator, wherein the substituted benzophenone is phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, ethyl-2,4,6-trimethylbenzoylphenylphosphinate, 2,4,6-trimethylbenzophenone, 4-methylbenzophenone, 4-phenylbenzophenone, 2,2-dimethoxy-1,2-diphenylethanone, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, isopropylthioxanthone, methyl-o-benzoyl-benzoate, methylbenzoylformate, benzoin ethyl ether, 4′-ethoxyacetophenone, 4,4-bis(diethylamino)benzophenone, 2,2-dimethoxy-2-phenylacetephenone, 2-hydroxy-2-methylpropiophenone, 2-benzyl-2-(diemthylamino)-4′-morpholinobutryophenone, 4-methylbenzophenone, benzophenone hydrazone, or a combination thereof;
one or more hindered amine light stabilizers; and
optionally one or more low-VOC coalescents;
wherein the one or more UV-VIS absorbers and the one or more hindered amine light stabilizers are present in the coating composition in a total combined weight of at least 0.5 wt-% based upon the total polymer solids in the aqueous coating composition.