| abstract |
PURPOSE: To provide a polyacrylate polymer to improved in compression permanent set and prevented from scorching, that is prepared by compounding a curing agent such as a quaternary phosphonium salt and a retarder comprising a urea or thiourea compound. n CONSTITUTION: This polymer is prepared by compounding (B) a curing agent containing a quaternary ammonium or phosphonium salt combined with a quaternary ammonium or phosphonium salt, or metal salt of a carboxylic acid or an organophosphoric acid and (C) a retartder containing a urea or thiourea compound of the formula (X is S, O; R 1 , R 2 are independently 1-30C aliphatic, aromatic or combination thereof, H) to (A) a polyacrylaterubber with a halogen and carboxyl curing segment. n COPYRIGHT: (C)1990,JPO |