Hydrazodicarboxylates and use thereof as blowing agents

Details Hydrazodicarboxylates and use thereof as blowing agents Hydrazodicarboxylates and use thereof as blowing agents

1975-04-09

1976-03-23

Brust, Joseph P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 6996

Patent

active

039460649

ABSTRACT:
Certain hydrazodicarboxylates, namely polymers or oligomers made by reacting hydrazine with polyfunctional haloformates, especially difunctional haloformates, cyclized forms of said oligomers and condensation products of hydrocarbyl carbazates with polyfunctional, especially difunctional, haloformates are useful as chemical blowing agents for expanding gas-expandable polymeric materials. These compounds are novel.

REFERENCES:
patent: 3663603 (1972-05-01), Muller et al.
patent: 3819545 (1974-06-01), Hunter
patent: 3873592 (1975-03-01), Hunter
RabJohn, J.A.C.S., 70, (1948), pp. 1181-1183.

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