Elastomeric polymer mixture with good tearing resistance and stiffness for fiber, film and molded article

摘要

Polymer mixture includes elastomeric block copolymer with hard blocks S of vinyl aromatic monomers and statistical soft blocks B/S of dienes and vinyl aromatic monomers with a block structure(s) of S-B/S-S, whereby the diene content is at most 50 wt.% and the soft phase of B/S blocks comprises at least 60 wt.%. Polymer mixture comprises: (A) 1-85 wt.% elastomeric block copolymer with hard blocks S of vinyl aromatic monomers and statistical soft blocks B/S of dienes and vinyl aromatic monomers with a block structure(s) of S-B/S-S, whereby the diene content is at most 50 wt.% and the soft phase of B/S blocks comprises at least 60 wt.%; (B) 5-89 wt.% of a different block diene-vinyl aromatic monomers copolymer; (C) 10-94 wt.% transparent or impact polystyrene; and (D) 0-84 wt.% additives. An Independent claim is included for fibers, films and molded articles made from the above polymer mixture.