Method of making porous inorganic particle filled polyimide foam

Details Method of making porous inorganic particle filled polyimide foam Method of making porous inorganic particle filled polyimide foam

1989-07-24

1990-05-08

Foelak, Morton

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

Synthetic resins

Processes of preparing a desired or intentional composition...

521 54, 521 55, 521 91, 521122, 521184, 521185, 521189, 523219, C08J 932

Patent

active

049239074

ABSTRACT:
A method of making thermal insulating products comprising porous, lightweight, high temperature resistant inorganic particles in a polyimide foam matrix and the product thereof. A polyimide precursor powdered is mixed with about equal weight of flake-like porous inorganic particles to substantially uniformly coat the particles with powder. The mixture is placed in a mold and compressed slightly. The assembly is heated to the foaming temperature of the polyimide precursor for a period suitable to product uniform foaming. Then the temperature is raised to the curing and crosslinking temperature of the precursor for a time period sufficient to product complete cure. A high temperature and flame resistant, light weight, highly insulating product results. If desired, protective sheets of material may be bonded to selected product surfaces during or after the molding operation.

REFERENCES:
patent: 4518717 (1985-05-01), Long et al.
patent: 4520071 (1985-05-01), Noda et al.
patent: 4814356 (1989-03-01), Bongers et al.

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