Porous aramid membranes and emulsions useful for the casting the

Details Porous aramid membranes and emulsions useful for the casting the Porous aramid membranes and emulsions useful for the casting the

1987-05-06

1990-02-13

Jones, W. Gary

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050038, 264 49, 264204, 264344, B01D 1300, B01D 1304

Patent

active

049004433

ABSTRACT:
Fully aromatic polyamide (aramid) resins can be cast into ultraporous and microporous membranes by forming a solution of the resin in an amount sufficient to cast a coherent membrane, diluting the solution with a liquid pore modifier which is a nonsolvent for the resin so as to produce a metastable dispersion of the resin, adding a precipitant to form a turbid casting dope, casting the dope onto a surface, and gelling the so-cast film.

REFERENCES:
patent: 3567632 (1971-03-01), Richter et al.
patent: 3615024 (1971-10-01), Michaels
patent: 4340479 (1982-07-01), Pall
patent: 4567009 (1986-01-01), Badenhop et al.
patent: 4627992 (1986-12-01), Badenhop et al.
patent: 4629563 (1986-12-01), Wrasidlo
patent: 4774039 (1988-09-01), Wrasidlo

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