GLYCIDYL ESTER-ALLYL GLYCIDYL ETHER-ETHYLENIC EPOXIDE COPOLYMER

摘要

PURPOSE:To produce a rubbery solid copolymer giving a crosslinked product having excellent oil resistance, freeze resistance, ozone resistance, etc., by polymerizing a carboxylic acid glycidyl ester, an allyl glycidyl ether and an ethylenic epoxide in the presence of an organotin-phosphoric acid ester catalyst. CONSTITUTION:The objective rubbery solid copolymer is a polyether having a reduced viscosity of =0.5 measured as 0.1% monochlorobenzene solution at 80 deg.C, and composed of the structural units of formula I - formula III (R is 1-4C alkyl; R1 is H or methyl; X is halogen), wherein the composition of the polyether is 35-90mol% glycidyl ester of a 2-5C saturated aliphatic carboxylic acid, 1-20% allyl glycidyl ether and =5% ethylenic epoxide in terms of monomer units. The copolymerization is carried out in the presence of a catalyst obtained by the thermal condensation of an organotin compound with an alkyl ester of orthophosphoric acid of polyphosphoric acid.