POLYMERIC COMPOSITIONS AND FILMS FORMED THEREFROM

摘要

A polymeric composition which includes a styrene polymer, at least one unsaturated block copolymer having a high monoalkenyl arene content, a modulus less than 100,000 psi, and comprising at least two A blocks and at least one B block, each A block independently selected from mono alkenyl arene polymer blocks and each B block independently selected from polymer blocks having at least one conjugated diene and at least one mono alkenyl arene and having a controlled distribution. A second polymeric composition which includes a styrene polymer, at least one unsaturated block copolymer as defined hereinbefore; and at least one additional unsaturated block copolymer having a moderate monoalkenyl arene content. The polymeric composition can be used to produce films that have improved impact resistance that can be thermoformed.