Patent ID: 7847022
Filing Date: 2010-12-07
Classification: C08F,C08L,C09D,C09J,Y10T

Abstract:
1. An article comprising at least one unhydrogenated block copolymer and at least one other component selected from the group consisting of olefin polymers, polystyrene, tackifying resins, and polymer extending oils, wherein said block copolymer consists of at least one block A and at least one block B and wherein: a. each A block is a mono alkenyl arene homopolymer block and each B block is a controlled distribution copolymer block of at least one conjugated diene and at least one mono alkenyl arene; b. each A block having a number average molecular weight between about 3,000 and about 60,000 and each B block having a number average molecular weight between about 30,000 and about 300,000; c. each B block comprises terminal regions adjacent to the A blocks that are rich in conjugated diene units and one or more regions not adjacent to the A blocks that are rich in mono alkenyl arene units; d. the total amount of mono alkenyl arene in the block copolymer is about 20 percent weight to about 80 percent weight; e. the weight percent of mono alkenyl arene in each B block is between about 17 percent and about 50 percent; f. wherein the styrene blockiness index of the block B is less than about 10 percent; and g. wherein about 20 to about 40 mol percent of the condensed conjugated diene units in the B block have 1,2- or 3,4-addition.