US 11,905,434 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 Dec. 3, 2020, as Appl. No. 17/111,268.
Application 17/111,268 is a division of application No. 16/425,574, filed on May 29, 2019, granted, now 10,889,721.
Claims priority of provisional application 62/677,399, filed on May 29, 2018.
Prior Publication US 2021/0087408 A1, Mar. 25, 2021
Int. Cl. C09D 4/06 (2006.01); C09D 7/48 (2018.01); 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); C08L 21/02 (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)] 16 Claims
OG exemplary drawing
 
1. A 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 composition in a total combined weight of at least 0.5 wt-% based upon the total polymer solids in the composition;
wherein the one or more UV-VIS absorbers and the one or more hindered amine light stabilizers are present in a weight ratio of about 1:9 to about 7:3 (UV-VIS absorbers:hindered amine light stabilizers); and
wherein the composition is suitable for use in a paint and one or more of the following is true:
when the composition is used in a paint, applied to a substrate, and allowed to dry to form a dried film, the dried film has an improved din pick-up resistance by at least 10%, relative to the same composition without the one or more UV-VIS absorbers and the one or more hindered amine light stabilizers, based on a change in ΔE values;
when the composition is used in a paint, applied to a substrate, and allowed to dry to form a dried film, the dried film has an initial minimum gloss rating of at least 20 (satin-like), at least 35 (traditional semi-gloss), at least 70 (traditional gloss/high gloss architectural), or at least 85 (high gloss) units with a 60-degree gloss meter;
when the composition is used in a paint, applied to a substrate, and allowed to dry to form a dried film, the dried film has a gloss retention of less than a 10 unit drop over 2000 hours measured at 60-degree gloss according to ASTM G154, using Cycle 1 as listed in the standard; and/or
when the composition is used in a semi-glossy or glossy finish paint, applied to a substrate, and allowed to dry to form a dried film, the dried film has at least 80% gloss retention, the gloss retention being after at least 2000 hours measured by QUVA gloss retention at 60-degree gloss according to ASTM G154, using Cycle 1 as listed in the standard.