Styrol/Butadiene Block Copolymer Mixtures for Shrink Films

摘要

A mixture which comprises a) from 5 to 50% by weight of a block copolymer A which comprises one or more oopolymer blocks (B/S)_A each composed of from 65 to 95% by weight of vinylaromatic monomers and from 35 to 5% by weight of dienes and of a glass transtion temperature Tg_A in the range from 40° to 90° C. b) from 95 to 50% by weight of a block copolymer B which comprises at least one hard block S composed of vinylaromatic monomers and comprises one or more copolymer blocks (B/S)_B each composed of from 20 to 60% by weight of vinylaromatic monomers and from 80 to 40% by weight of dienes and of a glass transition temperature Tg_B in the range from - 70 ° to 0°C. c) from 0 to 45% by weight of polystyrene or of a block copolymer C other than A and B, and d) from 0 to 6% by weight of a plasticizer, and its use for production of shrink films.