Radiation-curable organopolysiloxane coating composition comprising mercaptoalkyl and silacyclopentenyl radicals, method of coating and article therefrom

Abstract From the Canadian patent

Radiation-curable compositions consisting essentially of a triorganosiloxane-endblocked polydiorganosiloxane fluid bearing a small percentage of mercaptoalkyl radicals and a curing agent comprising a 1,1'-oxy-bis- (1-methyl-1-silacyclopentene) are disclosed. When applied to a substrate and exposed to energetic radiation these, compositions rapidly cure to provide a coating on the substrate that releases aggressive adhesives. Advantageously the coating, when cured with ultraviolet light in air is essentially free of the obnoxious odor which characterizes the analogous compositions of the art which are cured with only polymethylvinylsiloxane as a curing agent. These compositions are useful as …