Patent ID: 7524899

Claim:
A blend comprising a) from 10 to 30% by weight of a linear block copolymer of vinylaromatic monomers and dienes of the structure (I) S 1 —(B/S) 1 —S 2 having a flexible phase fraction (B/S) 1 of not more than 55% by weight, based on the block copolymer (I) and b) from 90 to 70% by weight of a linear block copolymer of vinylaromatic monomers and dienes of the structure (II) S 3 —(B/S) 2 —S 4 having a flexible phase fraction (B/S) 2 of at least 65% by weight, based on the block copolymer (II), where S 1 is a block of vinylaromatic monomers having a number average molar mass M n in the range from 40 000 to 100 000 g/mol, S 2 , S 3 and S 4 are in each case blocks of vinylaromatic monomers having a number average molar mass M n in the range from 5000 to 20 000 g/mol, (B/S) 1 and (B/S) 2 are in each case copolymer blocks of dienes and vinylaromatic monomers having a number average molar mass M n from 15 000 to 40 000 g/mol and wherein the blend has a modulus of elasticity in the range from 50 to 200 mPa.