Expanded shaped articles of a heat resistant synthetic resin.

摘要

Disclosed are expanded shaped articles of a heat resistant synthetic resin which are obtained by pre-expanding expandable polymer particles containing a foaming agent, whose monomeric composition comprises 20 to 100% by weight of tertiary butyl styrene and 80 to 0% by weight of other polymerizable monomers, and heating the resulting preexpanded particles to thereby produce expanded shaped articles. Expanded shaped articles are also obtained by extrusion foaming.