Polymer blends containing polymer of amp;bgr;-hydroxybutyric acid and chlorine or nitrile group containing polymer

摘要

Polymer blends containing (i) 0.2-95% by weight of a high molecular weight &bgr;-hydroxybutyric acid homo- or copolymer and (ii) a polymer containing at least 25% by weight of chlorine or nitrile groups, such as chlorinated polyethylene, polyvinyl chloride, or a high acrylonitrile resin.PPIn small quantities the &bgr;- hydroxybutyric acid polymer acts as a processing aid for the chlorine or nitrile containing polymer.PPIn larger quantities the properties of the &bgr;-hydroxybutyric acid polymer or the chlorine or nitrile containing polymer are improved.