Patent ID: 6191225
Filing Date: 2001-02-20
Classification: C08F,C08G,C09D,Y10T

Abstract:
A thermosetting composition comprising a co-reactable solid, particulate mixture of:(a) polycarboxylic acid functional polymer prepared by atom transfer radical polymerization initiated in the presence of a first initiator having at least one radically transferable group, and in which said polycarboxylic acid functional polymer contains at least one of the following polymer chain structures:--[(M.sup.1).sub.t --(A).sub.u ].sub.v --and--[(A).sub.u --(M.sup.1).sub.t ].sub.v --wherein M.sup.1 is a residue, that is free of carboxylic acid functionality, of at least one ethylenically unsaturated radically polymerizable monomer; A is a residue, that has carboxylic acid functionality, of at least one ethylenically unsaturated radically polymerizable monomer; t and u represent average numbers of residues occurring in a block of residues in each polymer chain structure; and t, u and v are each independently selected for each structure such that said polycarboxylic acid functional polymer has a number average molecular weight of at least 250; and(b) epoxy functional polymer prepared by atom transfer radical polymerization initiated in the presence of a second initiator having at least one radically transferable group, and in which said epoxy functional polymer contains at least one of the following polymer chain structures:--[(M).sub.p --(G).sub.q ].sub.x --and--[(G).sub.q --(M).sub.p ].sub.x --wherein M is a residue, that is free of oxirane functionality, of at least one ethylenically unsaturated radically polymerizable monomer; G is a residue, that has oxirane 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 independently selected for each structure such that said epoxy functional polymer has a number average molecular weight of at least 250.