Method of making an electrically conductive polyurethane foam

Details Method of making an electrically conductive polyurethane foam Method of making an electrically conductive polyurethane foam

1990-03-02

1992-01-21

Kight, III, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 76, 521 99, 521123, 521142, 521149, C08G 1814, C08F 3600

Patent

active

050828703

ABSTRACT:
An electrically conductive flexible polyurethane foam having fine and homogeneous cells, being low in swelling by water and superior in dimensional stability can be prepared by mixing an isocyanate terminated urethane prepolymer holding isocyanate monomers therein prepared by reacting polyether polyol(s) holding poly(oxypropylene) chains and not more than 30 weight % of poly(oxyethylene) chains therein with a stoichiometrically excessive amount of an isocyanate component with an aqueous dispersion of electrically conductive carbon particles containing water in excess of the stoichiometric amount necessary to react with the isocyanate monomers in the urethane prepolymer and foaming the mixture in a closed mold having a capacity smaller than the volume of a foam which can be obtained by conducting the foaming of the said mixture of the urethane prepolymer and the aqueous dispersion of electrically conductive carbon particles freely under atmospheric pressure.

REFERENCES:
patent: 4931479 (1990-06-01), Morgan
patent: 4999385 (1991-03-01), McCullough, Jr. et al.

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