Liquid diphenylmethane diisocyanate compositions

Details Liquid diphenylmethane diisocyanate compositions Liquid diphenylmethane diisocyanate compositions

1984-12-14

1985-09-03

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260453AM, C07C119048

Patent

active

045391572

ABSTRACT:
The present invention is directed to a process for the preparation of a stable, liquid adduct comprising reacting a mixture of neopentyl glycol and propylene glycol with a diphenylmethane diisocyanate containing less than 85 percent by weight of the 4,4'-isomer at a temperature of from about 25.degree. C. to about 120.degree. C. in an amount such that said adduct has an isocyanate group content of from about 20 to about 30 percent by weight and wherein the ratio of mole equivalents of neopentyl glycol to mole equivalents of propylene glycol is from 0.05:0.95 to 0.95:0.05, with the further proviso that

REFERENCES:
patent: 3644457 (1972-02-01), Konig et al.
patent: 3883571 (1975-05-01), Allport et al.
patent: 4055548 (1977-10-01), Carleton
patent: 4115429 (1978-09-01), Reiff et al.
patent: 4118411 (1978-10-01), Reiff et al.
patent: 4229347 (1980-10-01), Holt et al.

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