Patent ID: 6420506
Filing Date: 2002-07-16
Classification: C08F,Y10S

Abstract:
A copolymer consisting of repeating units derived from an &agr;-olefin having 3 to 20 carbon atoms, repeating units derived from a mono-alkenyl hydrocarbon containing an aromatic hydrocarbon having 6 to 25 carbon atoms and repeating units derived from a diene selected from the group consisting of bis-alkenyl aromatic hydrocarbons, cyclic dienes and branched dienes and having no crystallinity, wherein the contents of the mono-alkenyl hydrocarbon unit and the diene unit determined by a 13C-NMR spectrum are 1 to 99 mol % and 0.00001 to 30 mol %, respectively, the number average molecular weight of the copolymer is 50,000 to 1,000,000, and the weight average molecular weight to the number average molecular weight of the copolymer is 1.5 to 6.0.