Abstract: An accelerator composition for the curing of unsaturated maleic, allylic, vinylic and epoxy-type polyester resins is disclosed. The accelerator composition includes a complex of a salt of a metal selected from lithium, copper, manganese, magnesium, vanadium, iron and cobalt, with an ammonium salt of a C.sub.2 -C.sub.20 carboxylic acid which is capable of forming a complex with the metal salt. Also disclosed are a curable resin composition including the foregoing accelerators and a curing process employing these accelerators.

Abstract: Accelerator compositions for the free radical polymerization of unsaturated polyesters and for the curing of unsaturated polyesters and polyurethanes are disclosed. More particularly, use is made of complexes of thiolic compounds with metal salts as the accelerators. In more preferred embodiments, the accelerators also include oxygen-containing compounds or phosphorus-containing compounds. Also disclosed are curable resin compositions comprising these accelerators and polymerization and curing processes employing these accelerators.

Abstract: An accelerator composition for the curing of unsaturated maleic, allylic, vinylic and epoxy-type polyester resins is disclosed. The accelerator composition includes a complex of a salt of a metal selected from lithium, copper, manganese, magnesium, vanadium, iron and cobalt, with an oxygen-containing compound which is capable of forming a complex with the metal salt and includes at least one functional group selected from aldehyde, ketone, ether, ester and alcohol. Also disclosed are a curable resin composition including the foregoing accelerators and a curing process employing these accelerators.