Patent ID: 6319988
Filing Date: 2001-11-20
Classification: C08F,C08G,C09D,Y10T

Abstract:
A thermosetting composition comprising a co-reactable solid, particulate mixture of:(a) capped polyisocyanate crosslinking agent; and(b) hydroxy functional nonrandom copolymer 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:.PHI.-[--(M).sub.p --(G).sub.q --].sub.x --Tor.PHI.-[--(G).sub.q --(M).sub.p --].sub.x --Twherein M is a residue, that is free of hydroxy functionality, of at least one ethylenically unsaturated radically polymerizable monomer; G is a residue, that has hydroxy functionality, of at least one ethylenically unsaturated radically polymerizable monomer; .PHI. is a residue from the initiator, free from the radically transferable group, selected from the group consisting of sulfonyl compounds, diethyl malonates and mixtures thereof; T is or is derived from the radically transferable group and is selected from the group consisting of halides and a dehalogenation reaction product of a limited radically polymerizable ethylenically unsaturated compound; 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 at least 1 and are selected for each structure such that said active hydrogen functional polymer has a number average molecular weight of at least 250 to 16,000.