Patent ID: 6391391
Filing Date: 2002-05-21
Classification: C08L,C09D

Abstract:
A method of coating a substrate comprising:(a) applying to said substrate a thermosetting composition; (b) coalescing said thermosetting composition to form a substantially continuous film; and (c) curing said thermosetting composition, wherein said thermosetting composition comprises a co-reactable solid, particulate mixture of: (i) polycarboxylic acid functional polymer prepared by atom transfer radical polymerization initiated in the presence of an initiator having at least one radically transferable group, and in which said polymer contains at least one of the following polymer chain structures: â€”[(M)pâ€”(G)q]xâ€”and â€”[(G)qâ€”(M)p]xâ€”wherein M is a residue, that is free of carboxylic acid functionality, of at least one ethylenically unsaturated radically polymerizable monomer; G is a residue, that has carboxylic acid functionality, of at least one ethylenically unsaturated radically polymerizable monomer; p and q represent average numbers of residues occurring in a block of residues in each polymer chain structure; and p, q and x are each individually selected for each structure such that said polycarboxylic acid functional polymer has a number average molecular weight of at least 250; and(ii) epoxide functional crosslinking agent having at least two epoxide groups.