Microporous membrane and process for the production thereof

Details Microporous membrane and process for the production thereof Microporous membrane and process for the production thereof

1998-07-31

2000-10-03

Cooney, J

Liquid purification or separation

Filter

Material

21050021, 521 50, 521146, B01D 3914

Patent

active

061268259

ABSTRACT:
The present invention relates to a microporous membrane and a process for producing thereof, especially a microporous membrane which can be used for microfiltration, has excellent resistance to chemicals, and a process for producing thereof.
The present invention provides a microporous membrane having excellent resistance to chemicals, and a microporous membrane which facilitates waste disposal, and a process for producing thereof.
The microporous membrane has a bubble point value measured by the use of ethanol (by the test method of JIS K3832) falling in the range of from 10 kPa to 1000 kPa and comprises a polymer prepared by ring opening polymerization of a compound represented by chemical formula (I) or a polymer which is a ring opening polymer or ring opening copolymer represented by chemical formula (II). An example of the ring opening ring polymer or ring opening copolymer is a norbornene resin.
The process for producing the microporous membrane is as follows: A polymer prepared by ring opening polymerization of a compound represented by chemical formula (I) is heated and dissolved in a solvent (a) in which the polymer is soluble, and casted to form a solution membrane, which is rapidly cooled, and extracted with a washing solvent (b) in which the polymer is insoluble to remove the solvent (a), whereby the microporous membrane having a bubble point value measured by the use of ethanol (by the test method of JIS K3832) falling in the range from 10 kPa to 1000 kPa is obtained.

REFERENCES:
patent: 4249000 (1981-02-01), Batzer et al.
patent: 4326958 (1982-04-01), Kawahara et al.
patent: 4643829 (1987-02-01), Sundet

Affiliated with

Also associated with

Rating

Microporous membrane and process for the production thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microporous membrane and process for the production thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microporous membrane and process for the production thereof will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-191501