Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1981-10-16
1983-03-22
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521128, C08G 1814
Patent
active
043776442
ABSTRACT:
This invention relates to solid reaction products of aliphatic, cycloaliphatic or araliphatic mono- and/or polyisocyanates and organic, weakly acid mono- and/or polycarboxylic acids for the production of cellular plastics articles and particularly polyurethane foams. The products of the present invention may also be in the form of mixtures with carboxylic acids. The products are suitable for the production of cellular or porous plastics articles, but are preferably used in the preparation of cellular thermoplastic polyurethanes and semi-rigid and particularly rigid polyurethane integral skin foams having a compact outer skin formed by foaming the reaction mixture in closed molds.
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Annalen der Chemie, Justus Liebigs, vol. 561, 1949, S. Peterson, p. 205-229 "Niedermoleculare Umsetzungsprodukte aliphatisches Diisocyanate" 210.
R. Vieweg et al., Kunststoffe-Handbuch, vol. 7, "Polyurethane", p. 25.
Grogler Gerhard
Kopp Richard
Mann Max
Bayer Aktiengesellschaft
Elder Richard A.
Gil Joseph C.
Harsh Gene
Welsh Maurice J.
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