Process for preparing polymers containing carbamoyl-hydroxamate

Details Process for preparing polymers containing carbamoyl-hydroxamate Process for preparing polymers containing carbamoyl-hydroxamate

1975-02-13

1976-05-04

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08G 1832

Patent

active

039547183

ABSTRACT:
Polymers made up of chains, which contain and/or are cross-linked by carbamoyl hydroxamate groups, are prepared by the interaction of hydroxamic acid and isocyanate groups contained in monomeric or polymeric molecules. The resulting polymers are thermally degradable and have utility for the preparation of foamed polymers such as polyurethanes or polyureas. Upon heating, the carbamoyl hydroxamate links evolve CO.sub.2 and cleave to produce amine and isocyanate groups. The isocyanate groups may be allowed to react with the amine groups, to form N, N' -- disubstituted urea groups, or caused to react with other active hydrogen functions, such as hydroxyls, to form a variety of products, such as polyurethanes.

REFERENCES:
patent: 3216842 (1965-11-01), Skeist et al.

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