Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1996-09-06
1998-06-02
Cooney, Jr., John M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521107, 521114, 521121, C08J 906
Patent
active
057600996
ABSTRACT:
Rigid polyurethane foams, preferably semirigid polyurethane foams, are produced by reacting an organic and/or modified organic polyisocyanates with relatively high molecular weight polyhydroxyl compounds and, optionally, low molecular weight chain extenders and/or crosslinkers in the presence of water or mixtures of water and physically acting blowing agents, optionally, catalysts, at least one additive selected from the group consisting of sulfonate salts of an acid group-containing alkylene oxide polymer, a phosphonate salt of an acid group-containing alkylene oxide polymer, and mixtures thereof, additional other additives and optionally, auxiliaries. The polyurethane foams produced by this process can be used to produce composite comprising at least one covering layer and at least one layer comprising a rigid or semirigid polyurethane foam produced by the process of the present invention.
REFERENCES:
patent: 5183830 (1993-02-01), Mohring et al.
patent: 5334448 (1994-08-01), Horn et al.
patent: 5512602 (1996-04-01), Horn et al.
Chakrabarti Sarbananda
Hertel Dieter
Horn Peter
Jung Ludwig
Lehr Gerhard
BASF - Aktiengesellschaft
Borrego Fernando A.
Cooney Jr. John M.
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