VERFAHREN ZUR HERSTELLUNG OFFENZELLIGER SCHAUMSTOFFE

摘要

A process for producing an open cell foam by irradiating a composition comprising (a) a thermoplastic resin polymer blend including 1,2-polybutadiene as one component, (b) a photosensitizing agent and (c) a thermally decomposable foaming agent, with ultraviolet light having a wavelength ranging from about 254 to about 400 m.mu. to thereby cross-link mainly the 1,2-poly-butadiene, and subsequently foaming the composition at a temperature higher than the softening point of the 1,2-polybutadiene and that of the thermoplastic resin polymer blended therewith and higher that the decomposition temperature of the foaming agent.