Patent ID: 8058346

Claim:
A composition comprising: a monovinylarene-conjugated diene block copolymer; wherein the block copolymer has two modes and three tapered blocks; wherein the monovinylarene in the three tapered blocks comprises less than 25 wt % of the block copolymer; wherein the block copolymer comprises at least a first and a second charge of monovinylarene, wherein the first charge has a weight ratio to the second charge in the range of 1:2 to 2:1; wherein the block copolymer comprises from 30 to 40 wt % diene; wherein a monoblock formed from a first charge of monovinylarene in the block copolymer preceding the three tapered blocks has a molecular weight in the range of 25,000 to 65,000 gram per mole; and wherein the block copolymer is prepared by the addition of a first initiator charge and a second initiator charge, and wherein the first initiator charge contains less initiator than the second initiator charge.