Process for producing porous materials

Details Process for producing porous materials Process for producing porous materials

C - Chemistry, Metallurgy

08

J

18/29

C08J 9/28 (2006.01) B29D 27/00 (1980.01)

Patent

CA 1068458

ABSTRACT OF THE DISCLOSURE A process for preparing a porous material having a fine pore size which comprises preparing a solution comprising resin comprising a vinylidene flouride/tetraflyoroethylene copolymer, a vinylidene fluoride polymer or a mixture thereof and at least a solvent for the resin and a non-solvent for the resin, and removing the solvent and the non-solvent from the solution, wherein a part of the resin is dissolved or swollen during the removal of the solvent and non-solvent. The material can be used in membranes for artificial organs, diaphragms for electrolytic and battery cells, general filtration membranes for chemicals, membranes for the separation, concentration and recovery of foodstuffs such as proteins and starches, membranes for the treatment of waste liquors such as acid and alkali waste liquors, and oil-water separating membranes.

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