WERKWIJZE VOOR DE BEREIDING VAN EXPANDEERBARE THERMOPLASTISCHE POLYMEERMENGSELS OP BASIS VAN STYREENPOLYMEREN.

摘要

Expandable thermoplastic polymeric compositions based on styrene polymers and copolymers in the form of fine particles are disclosed. The particulate compositions essentially consist of (a) styrene polymers containing one or more expanding agents; (b) a polyether derived from propylene oxide and, optionally also from ethylene oxide, and containing polyhydroxy compounds, the polyether being homogeneously dispersed on the surface and preferably also within the expandable particles and (c) optionally, in combination with powdered inorganic and/or organic substances which are homogeneously dispersed on the surface of the polymer particles.