Polystyrene resin foam and process for producing the foam body

摘要

PCT No. PCT/JP95/02363 Sec. 371 Date Aug. 22, 1997 Sec. 102(e) Date Aug. 22, 1997 PCT Filed Nov. 17, 1995 PCT Pub. No. WO96/16111 PCT Pub. Date May 30, 1996A blowing agent comprising a hydrofluorocarbon having at least one hydrogen atom and containing no chlorine is used to obtain a polystyrene-based resin foam body with a high expansion rate, employing as the base polymer a resinous blend comprising polystyrene and a polymer containing oxygen, nitrogen or fluorine or a resinous blend comprising polystyrene and an oxy acid or its derivative.