Selective permeable membranes and process for preparing the same

Details Selective permeable membranes and process for preparing the same Selective permeable membranes and process for preparing the same

1981-03-31

1982-11-09

Lawrence, Evan K.

Liquid purification or separation

Filter

Material

264 41, 427244, 427246, 427352, 427353, B01D 3916, B05D 500

Patent

active

043583784

ABSTRACT:
A selective permeable membrane and a process for preparing the membrane. The process comprises applying to a supporting substrate a membrane forming solution prepared by dissolving in an organic solvent a polyimide polymer comprising principally a repeating unit represented by the general formula (I): ##STR1## wherein R.sup.1 represents a divalent organic group, and a liquid swelling agent having a coagulation value with respect to the polyimide polymer of about 50 to about 200 and a boiling point of about 50.degree. C. to about 120.degree. C. under atmospheric pressure, evaporating at least a part of the swelling agent, and coagulating the polyimide polymer by contacting the polyimide polymer with a coagulating solvent which does not dissolve the polyimide polymer but is compatible with the organic solvent and the swelling agent.

REFERENCES:
patent: 4240914 (1980-12-01), Iwama et al.

Affiliated with

Also associated with

Rating

Selective permeable membranes and process for preparing the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Selective permeable membranes and process for preparing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Selective permeable membranes and process for preparing the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-745130