Heat-resistant compounds based on polyglycidyl ethers and multi-value phenols, halogenated tetraphenols, polyglycidyl ethers and processes for the production of tetraphenols.

摘要

Heat-hardenable compositions comprising mixtures of a) at least a polyglycidyl ether of a tetraphenol having on average at least three epoxy groups per molecule, and b) at least a tetraphenolic crosslinking agent, in a weight ratio sufficient to provide an epoxy group to phenolic hydroxyl group equivalent ratio in the range of from 0.5 to 1.5, and wherein the tetraphenol from which the polyglycidyl ether is derived and the tetraphenolic crosslinking agent are represented by the general formula CHEM wherein R1 and R2 are H or a C1-3 alkyl group, R3 is a linear C2-6 alkylene group which may carry one or more alkyl substituents, each n individually is 0,1 or 2 and X is Cl or Br. The heat-hardenable compositions are used in the preparation of laminates, such as in printed circuit boards, which require high thermal stability.