Mold release Characteristic grant manner null to the synthetic resin closed die forging moldings which use the mold release agent and the said mold release agent for synthetic resin closed die forging formation

摘要

PURPOSE: To obtain a releasing agent for giving excellent releasability to molded articles of synthetic resin in molds, comprising a polysiloxane-polyvinyl graft copolymer consisting essentially of specific two kinds of siloxane units. ;CONSTITUTION: The objective releasing agent comprises a polysiloxane-polyvinyl graft copolymer consisting essentially of a siloxane unit of formula I and a siloxane unit of formula II [R¹ to R³ are hydrocarbon containing carbon atom directly bonded to silicon atom, having no radical polymerizability; A is a bifunctional organic group containing carbon atom directly bonded to silicon atom and linked to B (vinyl polymer block)].;COPYRIGHT: (C)1993,JPO&Japio