Patent ID: 6310164
Filing Date: 2001-10-30
Classification: C08F

Abstract:
An unsaturated copolymer which is a copolymer of an .alpha.-olefin of 2 to 12 carbon atoms and a conjugated diene monomer represented by the following formula (I-a): ##STR17##whereinR.sup.2 is a hydrogen atom, an alkyl group of 1 to 8 carbon atoms or an aryl group,said unsaturated copolymer having the following properties:(a) in said copolymer, 1,2-addition units (including 3,4-addition units) derived from the conjugated diene monomer (I-a) form double bonds in the side chain of the copolymer, 1,4-addition units derived from the conjugated diene monomer (I-a) form double bonds in the main chain of the copolymer, and, the quantity ratio of the double bonds of the side chain derived from the 1,2-addition units to the double bonds of the main chain derived from the 1,4-addition units (side chain double bonds derived from the 1,2-addition units/main chain double bonds derived from 1,4-addition units) is in the range of 10/90 to 99/1,(b) five-membered rings are present in the main chain of said copolymer, and(c) the quantity ratio of the double bonds from all of the addition units to the five-membered rings (total of double bonds from all addition units/five-membered rings) is in the range of 20/80 to 90/10.