Sulfur foam product and process

Details Sulfur foam product and process Sulfur foam product and process

1974-05-10

1976-05-04

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25R, 260 25N, 260 25AM, 260 25AK, 250 25BE, 260 18TN, 260 308R, 260 9, 260 37N, 260859R, C08J 900

Patent

active

039546853

ABSTRACT:
A process for producing a sulfur foam which comprises forming a sulfur system containing an aliphatic polysulfide and optionally molten elemental sulfur, contacting and reacting an acid with the sulfur system to obtain a sulfur system-acid adduct, said acid being capable of forming CO.sub.2 or COS upon reaction with an isocyanate or isothiocyanate; and reacting polyisocyanate with the adduct to obtain sulfur foam.
Preferably the acids used in the preparation of the sulfur foam are carboxylic acids. The preferred aliphatic polysulfides include the liquid polysulfides derived by the reaction of sodium polysulfide with dichloroethyl ether and dichloroethyl formal.

REFERENCES:
patent: 3222301 (1965-12-01), Dahu
patent: 3494966 (1970-02-01), Geering et al.
patent: 3498936 (1970-03-01), Wilson
patent: 3542701 (1970-11-01), Von Roemsdouk
patent: 3892686 (1975-07-01), Woo

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