申请人:Ciba-Geigy Corporation
公开号:US04164611A1
公开(公告)日:1979-08-14
Aromatic sulfonic acid hydrazides and semicarbazides having a sterically hindered phenol group are usable as blowing agents in the manufacture of foamed plastics articles. On heating to about 200 to 300.degree. C. they are splitting off nitrogen and the residue remaining in the foam acts as stabilizer against thermo-oxidative degradation of the plastic material.
具有立体位阻酚基的芳香磺酸腙和半羧酸腙可用作在制造泡沫塑料制品时的发泡剂。加热至约200至300摄氏度时,它们会释放氮气,泡沫中剩下的残留物作为稳定剂,防止塑料材料的热氧化降解。