Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1978-10-12
1980-04-29
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
252431C, 521125, C08G 1814
Patent
active
042006996
ABSTRACT:
The rate of the reaction between a polyol and a polyfunctional isocyanate to form a rigid polyurethane foam can be controlled within a wide range, using as the catalyst for said reaction a mixture comprising catalytically effective amounts of an antimony carboxylate, a potassium carboxylate and a zinc carboxylate. The mixture can be used alone or in combination with tertiary amines or tin compounds, both of which are conventionally employed as catalysts for the polyol-isocyanate reaction.
REFERENCES:
patent: 3245958 (1966-04-01), Hindersinn et al.
patent: 3714077 (1973-01-01), Cobbledick et al.
patent: 3741918 (1973-06-01), Koleske et al.
patent: 3821130 (1974-06-01), Barron et al.
M&T Chemicals Inc.
Spector Robert
Welsh Maurice J.
Wheeless Kenneth G.
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