Patent ID: 11884840
Assignee: PPG INDUSTRIES OHIO, INC.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 9:
10. A method of improving fuel resistance of a coated article, comprising:
(1) applying a first film-forming composition to at least a portion of a substrate to form a coated substrate, wherein the first film-forming composition comprises:
A) a non-chlorinated, linear polyolefin comprising 0.5 to 10 percent by weight residues of an ethylenically unsaturated anhydride or acid, based on the total weight of the linear polyolefin polymer;
B) an aminoplast; and
C) a component comprising:
i) at least one non-chlorinated hydrocarbon having at least 18 carbon atoms and which optionally includes aromatic groups and/or oxygen heteroatoms, having a number average molecular weight of 200 to 2500; and/or
ii) an alkyd resin that is different from the component C) i); wherein 1) the linear polyolefin polymer A) is dispersed with a polyepoxide and a monohydric alcohol in an organic medium, and/or 2) the linear polyolefin polymer A) is further reacted with a) a polyepoxide and a monohydric alcohol, or b) an epoxy functional alkoxysilane;

(2) optionally subjecting the coated substrate formed in step (1) to a temperature for a time sufficient to cure the film-forming composition;
(3) applying at least one curable film-forming composition to at least a portion of the coated substrate formed in step (1) to form a multi-layer coated substrate; and
(4) subjecting the multi-layer coated substrate formed in step (3) to a temperature and for a time sufficient to cure all of the curable film-forming compositions; wherein the substrate comprises a polymeric material.