Porous membranes based on unstable polymer solutions

Details Porous membranes based on unstable polymer solutions Porous membranes based on unstable polymer solutions

1993-02-11

1995-02-07

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 60, 521 64, 521184, 536 3, 536 551, 536 56, C08J 928

Patent

active

053876210

ABSTRACT:
Porous, distensible, gel-like membranes which in tubular form are suitable as implants, e.g., vascular prostheses and a process for the preparation thereof is described. The membranes are formed by a spraying, phase-inversion technique which employs thermodynamically unstable polymer solutions and is accomplished by separately spraying the unstable solution and a nonsolvent onto a rotating surface. Prostheses from the highly porous tubular membranes have shown a high degree of patency and completeness of the healing process and are useful for direct implantation in the body or for extracorporeal vascular accesses.

REFERENCES:
patent: 3968292 (1976-07-01), Pearman et al.
patent: 3982335 (1976-09-01), Cunningham et al.
patent: 4127124 (1978-11-01), Clagett et al.
patent: 4661530 (1987-04-01), Gogolewski et al.
patent: 4914064 (1990-04-01), Schucker
patent: 5063186 (1991-11-01), Schucker
patent: 5208313 (1993-05-01), Krishan

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