Flexible microporous cellulosic membranes and methods of formati

Details Flexible microporous cellulosic membranes and methods of formati Flexible microporous cellulosic membranes and methods of formati

1978-10-23

1980-09-02

Morris, Theodore

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

106197R, 210500M, 264 41, B29D 2704, C08L 118, C08L 126

Patent

active

042204771

ABSTRACT:
Microfiltration membranes are described comprising 10% to 50% cyanoethylated polysaccharide ether polymers blended with 50% to 90% polymers of cellulose nitrate, cellulose acetate or mixtures of the two. These membranes are flexible and strong and can be readily pleated for use in cartridge filters as well as used flat in conventional single- or multi-plate holders. They are also more thermally stable than conventional "mixed ester" (cellulose nitrate/cellulose acetate) membranes.

REFERENCES:
patent: 3342729 (1967-09-01), Strand
patent: 3520960 (1970-07-01), Douglas
patent: 3620970 (1971-11-01), Klug
patent: 3733367 (1973-05-01), Perry et al.
patent: 3852224 (1974-12-01), Bridgeford
Francis, P. S., Fabrication and Evaluation of New Ultra-Thin Reverse Osmosis Membranes, United States Dept. of Interior, Office of Saline Water, Research & Development Report No. 177, Feb. 1966, pp. 38-41.

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