Polymer composition comprising at least one vinyl aromatic diene block copolymer and specific amounts of oil

A polymer composition consisting of:

• 94.9 to 97.49% by weight, based on the total polymer composition:
• at least one block copolymer P, having one of the following formulas (I) to (III):
• (A-B/A)n-A (I),
• X—[(B/A-A)n]m+1 (II),
• Y—[(B/A-A)n]m+1 (III),
• wherein the abbreviations and indices have the following meaning:
• A is a vinyl aromatic block forming a hard phase, which is composed of at least one vinyl aromatic monomer MA,
• B/A is a diene block forming a soft phase, which is composed of at least one conjugated diene monomer MB and at least one vinyl aromatic monomer MA,
• X is the radical of an m+1-functional initiator,
• Y is the radical of an m+1-functional coupling agent,
• n is a natural number from 1 to 10, and
• m is a natural number from 1 to 10;
• 2.5 to 5% by weight, based on the total polymer composition,
• at least one oil component C, wherein the oil component is one or more paraffin oil;
• and
• 0.01 to 1% by weight, based on the total polymer composition, one or more further components E;
• wherein:
• the at least one block copolymer P comprises 40 to 75% by weight, based on the block copolymer P, of the at least one vinyl aromatic monomer MA and 25 to 60% by weight, based on the block copolymer P, of the at least one conjugated diene monomer MB;
• the glass transition temperature's Tg of the vinyl aromatic block's A is/are above 25° C. and the glass transition temperature's Tg of the diene block's B/A is/are below 25° C.,
• the proportion of the vinyl aromatic block's forming the hard phase is from 5 to 40% by volume, based on the total volume of block copolymer P;
• the relative amount of 1,2 linkages in the diene block B/A, based on the sum of 1,2- and 1,4-cis/trans-linkages, is less than or equal to 15%;
• and
• the weight average molecular weight Mw of the block copolymer P is in the range of 120,000 to 300,000 g/mol.