Production of isocyanates

Details Production of isocyanates Production of isocyanates

1977-03-28

1979-03-20

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260307D, 260307F, 260307G, 260453A, 260453AP, C07C11800, C07D27300

Patent

active

041453603

ABSTRACT:
Process for the preparation of organic isocyanates in which a furoxan is heated in the presence of a vicinal diketo compound containing two adjacent keto carbonyl groups. When the furoxan ring is fused to an organic ring system di-isocyanates are produced. An adduct of the furoxan and the diketo compound may be isolated from the reaction mixture and used as a stable isocyanate precursor, for example, a "one-pot" polyurethane composition.

REFERENCES:
patent: 3560518 (1971-02-01), Burk, Jr. et al.
patent: 3560519 (1971-02-01), Burk, Jr. et al.
patent: 3609162 (1971-09-01), Burk, Jr. et al.
patent: 3825554 (1974-07-01), Burk, Jr. et al.
patent: 3925435 (1975-12-01), Crosby et al.
patent: 3979401 (1976-09-01), Burk, Jr. et al.
patent: 4029686 (1977-06-01), Crosby et al.

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