Lightweight flexible imide foam and method of producing same

Details Lightweight flexible imide foam and method of producing same Lightweight flexible imide foam and method of producing same

1990-08-09

1990-12-25

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521156, C08J 902

Patent

active

049803875

ABSTRACT:
Described is a lightweight open-cell flexible foam having a density no greater than about 6 pounds per cubic foot, preferably less than 1.0 pound per cubic foot (pcf) comprising the reaction product of an organic polyisocyanate and a mixture of difunctional acids, acid anhydrides, and difunctional anhydrides in the presence of a tertiary amine triazine catalyst, which reactants during the manufacturing process generate carbon dioxide, wherein the ratio of imide to amide groups in the final product is greater than 1.

REFERENCES:
patent: 3620987 (1971-11-01), McLaughlin et al.
patent: 3644234 (1972-02-01), Grieve
patent: 4108810 (1978-08-01), Baker

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