Rigidized open cell polyurethane foam

Details Rigidized open cell polyurethane foam Rigidized open cell polyurethane foam

1979-10-11

1981-03-24

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 53, 521137, 521156, 260DIG40, C08G 1814, C08G 1838, C08G 1882

Patent

active

042581370

ABSTRACT:
This invention relates to the preparation of a flexible, open cell polyurethane foam which can be rigidized by incorporating an epoxy resin into the mixture prior to foaming and, after forming a flexible foam, adding an epoxy curing agent thereto to cause the epoxy resin to cure thereby rigidizing the previously flexible foam. The flexible foam can be reshaped prior to rigidizing if desired.

REFERENCES:
patent: 2444333 (1948-06-01), Castan
patent: 3145438 (1964-08-01), Kottke et al.
patent: 3242108 (1966-03-01), McGary et al.
patent: 3620987 (1971-11-01), McLaughlin et al.
patent: 3673128 (1972-06-01), Hayash et al.
patent: 3676380 (1972-07-01), McLaughlin et al.
patent: 3781229 (1973-12-01), Smith et al.
patent: 4137200 (1979-01-01), Wood et al.
Frisch, Rubber Chemistry & Technology, Sep. 1972, vol. 45, No. 5, pp. 1442, 1460, 1461.

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