Polycarbonate membranes and production thereof

Details Polycarbonate membranes and production thereof Polycarbonate membranes and production thereof

1980-02-07

1982-01-26

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

2105002, B29D 2700

Patent

active

RE0308560

ABSTRACT:
Polycarbonate membranes useful for hemodialysis are fabricated from polyether-polycarbonate block copolymers by a water gelation process. The process comprises casting onto a substrate surface a layer of a multicomponent casting solution comprising the copolymer dissolved in a water-miscible organic solvent together with a cosolvent which acts as a swelling agent for the copolymer, drying the layer to partially evaporate the solvents therefrom, immersing the partially dried layer in water to form a gelled membrane, and stripping the gelled membrane from the substrate surface. The membrane has improved strength and improved permeability to solutes in the "middle molecule" range while maintaining clinically acceptable ultrafiltration rates and clearance of low molecular weight solutes.

REFERENCES:
patent: 3133132 (1964-05-01), Loeb et al.
patent: 3332894 (1967-07-01), Cantor et al.
patent: 3767737 (1973-10-01), Lundstrom
Goldberg, Eugene P., "Journal of Polymer Science", Part C, No. 4, pp. 707-730 (1963).
U.S. Department of Health, Education and Welfare, "Proceedings of the 5th Annual Contractor's Conference of the National Institute of Arthritis and Metabolic Diseases", (1972), pp. 32-33.
Billmeyer, Fred. W., "Textbook of Polymer Science", New York, Interscience, .COPYRGT.1962, pp. 79-86.

Affiliated with

Also associated with

Rating

Polycarbonate membranes and 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 Polycarbonate membranes and production thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polycarbonate membranes and production thereof will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1661254