Coating processes using waterborne curable film-forming compositions containing polymers derived from natural gas raw materials

摘要

A method is provided for forming a composite coating on a substrate comprising:
(A) applying a first coating composition to a surface of the substrate; and(B) applying a second coating composition to the first coating prior to substantially heating or curing the first coating. The first and/or second coating composition is a waterborne curable film-forming composition comprising:
(a) an aqueous dispersion of internally crosslinked polymeric microparticles having a core-shell morphology and having reactive functional groups; and(b) a crosslinking agent. The core of the polymeric microparticles is prepared from a monomer mixture comprising at least 20 percent by weight of a monomer having the structure:;wherein X is N or O; R is a linear or branched alkyl group having 1 to 18 carbon atoms, or R is bonded to X to form a 5- to 7-member ring.

主权项

1. A method for forming a composite coating on a substrate comprising:
(A) applying a first coating composition to at least a portion of a surface of the substrate; and (B) applying a second coating composition to at least a portion of the first coating formed in step (A) prior to substantially heating or curing the first coating, to form a secondary coating thereon and yielding a composite coating; wherein the first and/or second coating composition is a waterborne curable film-forming composition comprising an aqueous dispersion of:
(a) internally crosslinked polymeric microparticles having a core-shell morphology and having reactive functional groups; and(b) a crosslinking agent having functional groups reactive with functional groups on the polymeric microparticles;wherein the core of the polymeric microparticles is prepared from a monomer mixture comprising at least 20 percent by weight of a monomer having the structure:wherein X is N or O; R is a linear or branched alkyl group having 1 to 18 carbon atoms, or R is bonded to X to form a 5- to 7-member ring; based on the total weight of monomers in the monomer mixture.