Asymmetrical layered structures of polyalkylene sulfone resins

Details Asymmetrical layered structures of polyalkylene sulfone resins Asymmetrical layered structures of polyalkylene sulfone resins

1983-11-03

1986-02-04

Ives, Patricia C.

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Hollow or container type article

Cellular material derived from plant or animal source

428337, 428521, 428215, 528385, 427314, 55 16, 55158, B32B 2732, C08F 1306

Patent

active

045685797

ABSTRACT:
Asymmetrical layered structures such as asymmetrical films are disclosed. The main body section contains a multitude of pores (voids). A thin surface skin is free of pores. The entire structure is fabricated from a polyalkylene sulfone resin in which the alkylene moiety contains 6 to 18 carbon atoms. Processes for preparing the structures also are disclosed. The structures are semi-permeable to gases and are used as membranes to enrich the oxygen content of oxygen
itrogen mixtures.

REFERENCES:
patent: 3928294 (1975-12-01), Crawford et al.
patent: 4179757 (1979-12-01), Crawford et al.

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