Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1976-07-09
1979-08-14
Waltz, Thomas
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
260554, 260556H, 521 95, 521120, 521129, 521142, 521145, 521189, C07C13302, C07C143825, C08J 910
Patent
active
041646118
ABSTRACT:
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.
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patent: 3344182 (1967-09-01), Amidon
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patent: 3933909 (1976-01-01), Herweh
Illy Hugo
Kirchmayr Rudolf
Schmidt Andreas
Schmitter Andre
Ciba-Geigy Corporation
Jorda Karl F.
Waltz Thomas
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