Semipermeable membranes of aromatic disulfimide containing polya

Details Semipermeable membranes of aromatic disulfimide containing polya Semipermeable membranes of aromatic disulfimide containing polya

1979-05-30

1981-05-26

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

264216, 428 35, 2105002, 528172, 528173, 528184, 528336, 528344, 528348, C08G 6932

Patent

active

042699673

ABSTRACT:
The invention relates to membranes which consist of aromatic polyamides containing disulphimide groups and have relative viscosities .eta..sub.rel of .gtoreq.1.4 as measured on a 0.5% N-methylpyrrolidone solution at 20.degree. C., and which may be used for ultrafiltration and inverse osmosis. The membranes of these polyamides according to the invention have a high permeability to water, for example, a throughflow of 1000-5000 1/m.sup.2 d under a pressure of 20 bars, and a high retention capacity for dissolved substances.

REFERENCES:
patent: 3664986 (1972-05-01), MacDonald
patent: 3676525 (1972-07-01), Wolf et al.
patent: 3696031 (1972-10-01), Credali et al.
patent: 3755263 (1973-08-01), Bodesheim et al.
patent: 3786024 (1974-01-01), Wolf et al.
patent: 4123424 (1978-10-01), Credali et al.
patent: 4129559 (1978-12-01), Credali et al.

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