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US 4,072,637 AGranted
Process for the production of polyurethane resins and foams utilizing silico-formic acid
OwnerDavid H. Blountinventor
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Abstract
Silico-formic acid is reacted with a suitable isocyanate to produce an isocyanate-silico-formate resins of the type generally referred to as a polyurethane resin. An activator, such as water, may be mixed with the resin to cause foaming and/or cross linking of the polymer.
Claims11
A process for the production of isocyanate-silico-formate compositions which comprises the steps of:
- (a) providing about 1 mol of silico-formic acid;
- (b) mixing therewith from about 0.5 to about 2 mols of an organic diisocyanate compound;
- (c) maintaining said mixture at a temperature of from about 20.degree. C to about 60.degree. C;
- and
- (d) agitating said mixture until a smooth, creamy appearance is obtained.
2 more elements
Dependencies are inferred from the claim text.