Patent ID: 8981008
Filing Date: 2015-03-17
Classification: C08F,C08L,C09J,Y10S

Abstract:
1. A composition, comprising: a tapered triblock copolymer having the formula B-(B/A)-A and having at least one B block, at least one (B/A) block and at least one A block, wherein: (a) the B block comprises at least one conjugated diene monomer and at least one monovinyl aromatic monomer, wherein the B block ranges from about 34 to about 51 wt % of the tapered triblock copolymer, wherein the amount of the conjugated diene monomer in the B block ranges from about 70 to about 90 wt %, and wherein the 1,2-addition-vinyl content in the B block ranges from about 20 to about 41 wt % of the amount of the conjugated diene monomer in the B block, the B block being further characterized in having: (b) the (B/A) block comprises at least one conjugated diene monomer and at least one monovinyl aromatic monomer, wherein the (B/A) block ranges from about 24 to about 46 wt % of the tapered triblock copolymer, and wherein the amount of the conjugated diene monomer in the (B/A) block ranges from about 45 to about 66 wt %, the (B/A) block being further characterized in having: (c) the A block comprises a polymer block of at least one monovinyl aromatic monomer, wherein the A block ranges from about 17 to about 31 wt % of the tapered triblock copolymer, and wherein the amount of monovinyl aromatic monomer in the tapered triblock copolymer is no more than about 53 wt %.