ADDITIVES FOR SYNTHETIC RESINS

摘要

An additive for thermosetting or thermoplastic synthetic matrix resins includes a ¢liquid rubber!/¢polyester! block copolymer comprising block liquid rubber compound parts and block polyester parts as constituent segments. One or more of these polyester parts are connected to each one of the liquid rubber compound parts through ester bond. The disclosed additives uniformly mix with and stably disperse in the matrix resins, thus improving the mechanical strength and reducing the shrinkage of the products moulded therefrom.