Patent ID: 6710151
Filing Date: 2004-03-23
Classification: C08G

Abstract:
An end-blocked isocyanate prepolymer having an oxadiazine ring, wherein at least one of isocyanate groups of a NCO-terminated isocyanate prepolymer, which has NCO groups at the ends and comprises units derived from an oxadiazinetrione compound (A) represented by the following formula (1) and units derived from an active hydrogen compound (3) represented by the following formula (2), is blocked with a unit derived from an end-blocking agent (C) having at least one active hydrogen in one molecule, said end-blocked isocyanate prepolymer having a softening point of not lower than 50Â° C., wherein R1 is a group selected from the group consisting of an aliphatic hydrocarbon group of 2 to 20 carbon atoms, an aliphatic hydrocarbon group having an aromatic group and an alicyclic hydrocarbon group, and n is an integer of 1 or greater,Hâ€”Aâ€”R2â€”Aâ€”Hâ€ƒâ€ƒ(2) wherein R2 is a straight-chain, branched or cyclic alkylene group of 2 to 12 carbon atoms, and A is any one of an oxygen atom, a sulfur atom, a Nâ€”Râ€² group (Râ€² is a hydrogen atom, an alkyl group, an aryl group or an aralkyl group) and a COO group.