	US 11,708,470 B2
	Plastic substrate adhesion promoter with random copolymer
Wei Wang, Allison Park, PA (US); Chinming Hui, Pittsburgh, PA (US); Lan Deng, Pittsburgh, PA (US); Stephen John Thomas, Aspinwall, PA (US); Terri Lynn Ziegler, Maple Grove, MN (US); and Richard Alan Janoski, Sr., Pittsburgh, PA (US)
Assigned to PPG Industries Ohio, Inc., Cleveland, OH (US)
Filed by PPG Industries Ohio, Inc., Cleveland, OH (US)
Filed on Dec. 21, 2016, as Appl. No. 15/386,361.
Prior Publication US 2018/0171170 A1, Jun. 21, 2018
Int. Cl. C09D 133/00 (2006.01); C08J 7/043 (2020.01); C09D 133/08 (2006.01); C09D 133/12 (2006.01); C08J 7/04 (2020.01); B05D 7/02 (2006.01); B05D 5/04 (2006.01); B05D 1/36 (2006.01); B05D 3/00 (2006.01); C08F 220/18 (2006.01)

CPC C08J 7/043 (2020.01) [B05D 1/36 (2013.01); B05D 3/002 (2013.01); B05D 5/04 (2013.01); B05D 7/02 (2013.01); C08F 220/1811 (2020.02); C08J 7/042 (2013.01); C08J 7/0427 (2020.01); C09D 133/08 (2013.01); C09D 133/12 (2013.01); C08J 2323/12 (2013.01); C08J 2433/08 (2013.01); C08J 2433/12 (2013.01)]

9 Claims

1. A solvent-borne resinous adhesion promoter coating composition comprising:

(a) a random copolymer having first and second constitutional monomeric units, the first monomeric units comprising functional groups that promote adhesion to a polymeric substrate and monomeric units derived from cycloalkyl(meth)acrylate and/or aryl(meth)acrylate, and the second monomeric units comprising an active hydrogen containing functional group, wherein the random copolymer has a number average molecular weight of up to 20,000 g/mol;

(b) a non-reactive adhesion promoter that does not react with other components of the solvent-borne coating composition, wherein the non-reactive adhesion promoter comprises a polyolefin or a chemically modified polyolefin; and

(c) a solvent, wherein when the solvent-borne coating composition is applied to a substrate and cured, the coating composition forms a coating layer.