Isocyanate-uretdiones and a method for their production

Details Isocyanate-uretdiones and a method for their production Isocyanate-uretdiones and a method for their production

1986-01-28

1987-05-26

Daus, Donald G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D22900, C07D40306, C07D40314

Patent

active

046687807

ABSTRACT:
Isocyanate-uretdiones having the formula: ##STR1## wherein the R groups are identical or different and are hydrocarbon groups having the formulas: ##STR2## and n is an integral or fractional number from 1 to 5. Production of the isocyanate-uretdiones, which can be dissociated by heat up to an extent of greater than 70%, is accomplished through dimerization of aliphatic diisocyanates having the formula: ##STR3## with a phosphine catalyst having the formula:

REFERENCES:
patent: 3631198 (1971-12-01), Horuitz et al.
patent: 4413079 (1983-11-01), Disteldorf et al.
patent: 4463154 (1984-07-01), Disteldorf et al.
patent: 4476054 (1984-10-01), Disteldorf et al.
Official Gazette, vol. 1047, No. 3, Oct. 16, 1984, p. 1019.

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