Aromatic sulfonyl hydrazides and semicarbazides as chemical blowing
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.