CROSSLINKABLE POLYTETRAFLUOROETHYLENE COMPOSITION, CROSS- LINKED POLYTETRAFLUOROETHYLENE POWDER, POLYTETRAFLUORO- ETHYLENE MOLDINGS, RESIN BLEND COMPOSITIONS, AND RESIN BLEND MOLDINGS

摘要

The invention aims at providing a PTFE resin which can be molded by a conventional process such as compression molding without expensive equipment or hot-coining of low productivity and little generates toxic substance during the molding and which retains the strength, crystallinity and surface characteristics inherent in conventional PTFE resins and exhibits isotropy, uniformity, and less deformation than those of conventional PTFE resins. The crosslinkable polytetrafluoroethylene composition comprises a polytetrafluoroethylene and a crosslinking agent. The polytetrafluoroethylene has at least one reactive functional group selected from the group consisting of cyano (-CN), carboxyl (-COOH), alkoxycarbonyl (-COOR (wherein R is a monovalent organic group)), and acid halide groups (-COX (wherein X is halogen)) at the end of at least either of the backbone chain and the side chain. The crosslinking agent can react with one or more of the reactive functional groups to form a ring structure.