Patent ID: 6806317
Filing Date: 2004-10-19
Classification: C08F,C08L,C09J

Abstract:
An adhesive composition containing a block copolymer, characterized in that the block copolymer has a polymer block (A) which is principally composed of an &agr;-methyl styrene unit, and a polymer block (B) which is principally composed of a conjugated diene unit and of which at least part of the carbon-carbon unsaturated double bonds may be hydrogenated, wherein said block copolymer includes:(1) a polymer block (A) which has a number-average molecular weight of 1,000 to 300,000; and (2) a polymer block (B) including: a polymer block (b1) which has a number-average molecular weight of 500 to 10,000 and of which 1,4-bond content is less than 30%; and a polymer block (b2) which has a number-average molecular weight of 10,000 to 400,000 and of which 1,4-bond content is not less than 30%, and in that the block copolymer has at least one (A-b1-b2) structure.