Patent ID: 6350820
Filing Date: 2002-02-26
Classification: C08F,C08L,C09D,C09K,G11B

Abstract:
A composition comprising a hydrogenated alternating block copolymer, wherein the hydrogenated block copolymer comprises at least two distinct blocks of hydrogenated polymerized vinyl aromatic monomer, herein referred to as hydrogenated vinyl aromatic polymer block, and at least one block of hydrogenated polymerized conjugated diene monomer, herein referred to as hydrogenated conjugated diene polymer block, wherein the hydrogenated block copolymer is further characterized by:a) a weight ratio of total hydrogenated conjugated diene polymer to total hydrogenated vinyl aromatic polymer of 40:60 or less; b) a total number average molecular weight (Mnt) of from 30,000 to 150,000, wherein each hydrogenated vinyl aromatic polymer block has a Mna of from 6,000 to 60,000 and each hydrogenated conjugated diene polymer block has a polymer length of approximately 120 monomer units or less; and c) a hydrogenation level such that each hydrogenated vinyl aromatic polymer block has a hydrogenation level of greater than 90 percent and each hydrogenated conjugated diene polymer block has a hydrogenation level of greater than 95 percent.