Novel thermosetting elastomeric compositions based on modified polycyanurates with enhanced heat resistance, process for their preparation and use

摘要

The invention relates to thermosetting elastomer compositions based on modified polycyanurate, process for preparing such elastomeric compositions, and their use. These compositions are prepared by a polymerization process in the presence of a catalyst of a mixture comprising at least: a cyanate, a block copolymer and a mineral filler capable of reacting with the cyanate at a temperature higher than the melting temperature of the cyanate or melting temperature of the block copolymer, but lower than 130 degC, wherein the polymerization process is carried out at a temperature ranging from 130 to 170 degC, and post-curing the polymerized mixture at a temperature not lower than about 200 DEG C to complete the reaction. The invention also relates to the use of the composition, particularly its use in electrical engineering and electronics, as a coating for rollers, in particular of printing machines and as an encapsulant for semiconductors.