Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1973-11-29
1976-08-17
Ivy, C. Warren
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 25AL, 260 25AT, 260 25BE, 260 28R, 260 336UB, 260 37N, 260859R, C08J 902
Patent
active
039753166
ABSTRACT:
Liquid isocyanate-terminated polyurethane prepolymers are cured by mixing them with about 5% to 200% by weight, preferably 10% to 100% by weight, based on the weight of prepolymer, of an aqueous colloidal dispersion selected from aqueous alkali metal silicates containing from about 20% to 60% solids and aqueous magnesium oxide containing from about 5% to 40% solids. The water associated with the aqueous dispersion is bound in the cured product and thus the dispersions act as both curing agents and low cost extenders. The cured materials may be non-porous elastomeric products or finely cellular products. Some of the cellular products are rigid and suitable for, e.g., structural applications. Both types of products have good flame retardant properties.
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"Polyurethanes Chemistry and Technology, Part II Technology," Saunders et al., Interscience; N.Y., 1964; pp. 7-10, 201-202, 300-306.
Ivy C. Warren
Marcus Stanley A.
Thiokol Corporation
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