Sulfur foam process and product

Details Sulfur foam process and product Sulfur foam process and product

1977-01-12

1978-03-14

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25AM, 260 25N, 260 25BE, 260 25AK, 260 174R, 260 4218, 260 4222, 260 4224, 260857PE, 260857UN, 260858, 260859R, C08J 900

Patent

active

040790231

ABSTRACT:
A process for making a sulfur foam containing at least 50 weight percent sulfur which comprises (a) contacting and reacting molten sulfur with a carboxylic acid which is reactive with the molten sulfur so as to incorporate the acid with the molten sulfur and form a molten sulfur-acid adduct containing carboxylic acid groups; (b) mixing the molten adduct with an alkali earth metal carbonate and a foam stabilizer such as talc or mica to obtain a mixture; and (c) reacting said mixture with phosphoric acid in the absence of any added phosphorus sulfide to obtain the foam. Preferably the molten sulfur is reacted with a plasticizer such as dicyclopentadiene before foaming with phosphoric acid.

REFERENCES:
patent: 3887504 (1975-06-01), Woo
patent: 3892686 (1975-07-01), Woo
patent: 3954685 (1976-05-01), Woo
patent: 4011179 (1977-03-01), Woo et al.

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