thermosetting compositions including epoxy functional polymers obtained by radical polymerization atom transfer.

A thermosetting composition comprising an admixture in solid particles which can co-react consisting of: (a) a block copolymer having an epoxy functional polymerization prepared atom transfer radical initiated in the presence of an initiator having at least one transferable group radical, and wherein said epoxy functional polymer contains at least one of the following structures polymer chain: - [(M) p- (G) q] x and - [(G) q- (M) p] x in which is or is derived from a radical initiator lacking radically transferable group, M is a radical which lacks oxirane functionality, of at least one radical polymerizable monomer ethylenically unsaturated; G is a radical having oxirane functionality of at least one polymerizable monomer ethylenically unsaturated radical; p and q represent the average of residues occurring in a block of residues in each chain structure polymer; p, q and x are individually selected cadauno of them for each structure such that the epoxy functional polymer has a molecular weight number average of at least 250; and (b) a co-reactant having functional groups reactive with the epoxy groups of (a).