Non-sticky, soft and transparent styrenic thermoplastic elastomers

A thermoplastic elastomer composition comprising components a), b), and c):

• a) 97.1 to 90.9 wt.-% of at least one star-shaped block copolymer A of the structure
• [S1-(S/B)k-(S/B)l-(S/B)m-S2]n-X (I),
• where S1 and S2 are polymer blocks made from at least one vinylaromatic monomer and S/B are random copolymer blocks made from at least one vinylaromatic monomer and at least one diene forming a soft phase;
• X is a coupling center derived from a polyfunctional coupling agent;
• b) 2.9 to 9.1 wt.-% of at least one plasticizer B;
• and
• c) 0 to 2 wt.-% of further additives C;
• wherein the sum of components a), b) and c) is 100 wt.-%;
• the arms S1-(S/B)k-(S/B)l-(S/B)m-S2 are identical;
• the proportion of the blocks S1 and S2 (forming a hard phase), based on the entire block copolymer A, is from 24 to 40 wt.-%;
• the vinylaromatic monomer/diene (=S/B) ratio of all of the blocks (S/B) is from 1/0.45 to 1/2.5;
• the S/B-ratio of the blocks (S/B)k, (S/B)l and (S/B)m is different from each other;
• the S/B-ratio of the blocks (S/B)k and (S/B)m is lower than the S/B-ratio of the block(s) (S/B)l;
• the weight ratio of blocks S2/S1 is from 0.1 to 0.8;
• the weight average molar mass Mw of the block copolymer A is from 200,000 to 350,000 g/mol;
• n is a natural number from 3 to 8;
• k and m are each 1;
• and
• l is a natural number of at least 1.