Aromatic sulfonyl hydrazides and semicarbazides as chemical blow

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

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.

REFERENCES:
patent: 2626933 (1953-01-01), Lober et al.
patent: 2640853 (1953-06-01), Sundholm
patent: 3152176 (1964-10-01), Hunter
patent: 3235519 (1966-02-01), Hunter
patent: 3344182 (1967-09-01), Amidon
patent: 3903157 (1975-09-01), Hunter
patent: 3925270 (1975-12-01), Hunter
patent: 3925466 (1975-12-01), Hunter
patent: 3933909 (1976-01-01), Herweh

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Aromatic sulfonyl hydrazides and semicarbazides as chemical blow does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Aromatic sulfonyl hydrazides and semicarbazides as chemical blow, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aromatic sulfonyl hydrazides and semicarbazides as chemical blow will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1377009

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.