Thermoplastic graft copolymer and process for preparing the same

摘要

PCT No. PCT/JP90/01592 Sec. 371 Date Jun. 5, 1992 Sec. 102(e) Date Jun. 5, 1992 PCT Filed Dec. 6, 1990 PCT Pub. No. WO91/09074 PCT Pub. Date Jun. 27, 1991.There are provided a thermoplastic graft copolymer comprising, as main chain, a polymer having a glass transition temperature of 10 DEG C. or below and, as side chain, an aromatic oligomer having a flow temperature of 100 DEG C. or above; and its preparation process, especially a process wherein an aromatic oligomer containing 50% or more of the structural units represented by the following formula (I): <IMAGE> (I) wherein X is O or S; and Ar is <IMAGE> <IMAGE> wherein R1 and R2 are alkyl group of 1-3 carbon atoms or phenyl group, and p and q are an integer of 0-2. The graft copolymer of this invention can be used as a thermal resistant plastic elastomer for heat-resisting hoses, seals, automobile materials, etc.