Macroporous substrate containing microporous matrix

Details Macroporous substrate containing microporous matrix Macroporous substrate containing microporous matrix

1986-03-07

1988-08-02

Spear, Frank

Liquid purification or separation

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Material

21050042, B01D 1300

Patent

active

047612320

ABSTRACT:
In a porous structure, a macroporous polyethylene substrate defining a network of interconnecting macropores and a microporous matrix of polyvinyl chloride is formed within and completely fills the network of macropores. The microporous matrix is cast within the network of macropores by impregnating the macropores with a solution of a solvent, a polymeric pore former, and polyvinyl chloride. The solution is caused to imbibe water from the atmosphere so as to separate into two liquid phases, one phase being rich in the polyvinyl chloride and the other phase being rich in water. The microporous matrix is coagulated from the first phase and the solvent and pore former are extracted from the macroporous matrix.

REFERENCES:
patent: 4214020 (1980-07-01), Ward et al.
patent: 4377481 (1983-03-01), Jakabhazy
patent: 4473475 (1984-09-01), Barnes, Jr. et al.

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