Low-temperature storage stable liquid diphenylmethane diisocyana

Details Low-temperature storage stable liquid diphenylmethane diisocyana Low-temperature storage stable liquid diphenylmethane diisocyana

1977-03-18

1978-09-19

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260453AM, 560 26, 560 27, 528 67, 521159, C07C119048

Patent

active

041154290

ABSTRACT:
The instant invention is directed to novel low temperature, storage stable liquid diphenylmethane diisocyanates and to the method of their preparation. The diisocyanates of the instant invention are provided by reacting diphenylmethane diisocyanates having a specified 2,4'-isomer content with polyoxyethylene glycols having molecular weights of from 150 to 1500. It has been surprisingly found that the products of the instant invention are both stable and liquid at -5.degree. C for at least 48 hours. In fact, in many instances, the products of the instant invention show no tendency to crystallize even when stored at -22.degree. C for 100 hours.

REFERENCES:
patent: 3362979 (1968-01-01), Bentley
patent: 3394165 (1968-07-01), McClellan et al.
patent: 3644457 (1972-02-01), Konig et al.
patent: 3883571 (1975-05-01), Allport et al.
patent: 4055548 (1977-10-01), Carleton et al.

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