Process for preparing a porous composite material

Details Process for preparing a porous composite material Process for preparing a porous composite material

1979-09-04

1981-02-24

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 65, 521 72, 521134, 521139, 521140, 521905, C08J 908, C08J 910

Patent

active

042529077

ABSTRACT:
A porous composite material includes a porous body formed of a hydrophobic polymer such as polyvinyl chloride and a layer of a hydrophilic polymer such as polyvinyl alcohol provided over at least a portion of the interior surface of each of the pores of the porous body. The composite material is obtained by a process including the steps of dispersing an aqueous solution containing a hydrophilic polymer and a foaming agent into a solution of a hydrophobic polymer in an organic solvent to form an emulsion, removing the water and the organic solvent from the emulsion to obtain a solid, and subjecting the solid to foaming conditions.

REFERENCES:
patent: 3027336 (1962-03-01), Gotz
patent: 3795720 (1974-03-01), Schwartz
patent: 3816170 (1974-06-01), Mudde
patent: 3873476 (1975-03-01), Jabs
patent: 3879493 (1975-04-01), Mudde
patent: 3888766 (1975-06-01), De Young

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