Epoxide-containing compositions and their polymerization

Abstract

Polymerizable compositions comprise (a) a compound containing in the same molecule both at least one 1,2-epoxide group and at least two groups chosen from allyl, methallyl, and 1-propenyl groups, e.g., 2,2-bis(3-allyl-4-(glycidyloxy)phenyl)propane or bis(3-(1-propenyl)-4-(glycidyloxy)phenyl)methane, and (b) a compound containing at least two mercaptan groups per molecule, e.g., pentaerythritol tetrathioglycollate. The compositions are caused to polymerize by the action of irradiation or free-radical catalysts. They may, if desired, also contain a heat-curing crosslinking agent for epoxide resins; the epoxide-containing polymers so obtained can be subsequently crosslinked in situ. The compositions are useful in various two-stage operations, such as the production of multilayer printed circuits.

Dependencies are inferred from the claim text.