| 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; R<1> 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.
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