HIGH-MOLECULAR WEIGHT COPOLYMER OF 1-ACETOXY-1,3- BUTADIENE

摘要

PURPOSE:The titled copolymer having a specific number-average molecular weight, improved practical strength and oil resistance, obtained by copolymerizing 1-acetoxy-1,3-butadiene with a conjugated diene and an ethylenic unsaturated compound. CONSTITUTION:(A) 1-Acetoxy-1,3-butadiene and (B) 20-70wt% conjugated diene (preferably butadiene) and/or an ethylenic unsaturated compound (preferably ethylene) are emulsified in the presence of a surface active agent[0.5-10pts.wt. based on 100pts.wt. of components A and B]into a water system, and polymerized using a polymerization initiator[(e.g., hydrogen peroxide) (0.001-10pts.wt. based on 100pts.wt. components A and B)], an activator[(e.g., ferrous salt) (0.001-0.5pts.wt. based on components A and B)], an electrolyte, a pH adjustor, an adjustor for molecular weight, etc. at preferably -5-40 deg.C, to give the desired copolymer having a number-average molecular weight of =22,000. USE:Useful as an adhesive for glass, paper, etc.