Open cell rigid thermoset foams and method

Details Open cell rigid thermoset foams and method Open cell rigid thermoset foams and method

1982-09-29

1984-06-12

Anderson, Philip E.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 453, 264 51, 264321, 521 88, 521 98, 521155, B29D 2700

Patent

active

044542488

ABSTRACT:
A rigid porous, deformation resisting, nonresilient inflexible thermoset resin foam having macroscopic open cells and the method of making the same. The method comprises foaming and partially curing a polyepoxide or polyurethane resin in which the cells are closed. The partially cured resin is softened by heating and then crushed to compress the cells to produce an open-celled product. The crushed foam is reexpanded and finally cured. The foam may be filled for strengthening with a filler such as carbon black before or after the final cure.

REFERENCES:
patent: 3907579 (1975-09-01), Ravault
patent: 4134945 (1979-01-01), Milford et al.
patent: 4171410 (1979-10-01), Frob
patent: 4265965 (1981-05-01), Chancler
patent: 4334944 (1982-06-01), Crey
Webster's New Collegiate Dictionary, Springfield, Mass., G. & C. Merriam Co., .COPYRGT.1961, pp. 344, 452.
Hackh's Chemical Dictionary, Fourth Edition, Completely Revised and Edited by Julius Grant, New York, McGraw-Hill, .COPYRGT.1972, pp. 293, 294, 366.

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