Polymeric dope solution for use in the preparation of an integra

Details Polymeric dope solution for use in the preparation of an integra Polymeric dope solution for use in the preparation of an integra

1996-06-21

1998-08-18

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

21050039, 21050041, 264 41, 524155, 524233, 524538, 524609, C08J 928

Patent

active

057959200

ABSTRACT:
A polymeric dope solution comprising a polymeric material and a mixed solvent as a solvent system for use in the preparation of an integrally skinned asymmetric membrane having a surface layer (selective surface layer) and a porous support layer, which is useful as a gas separation membrane, is disclosed. Also disclosed are a process for the preparation of the asymmetric membrane using the polymeric dope solution, and an integrally skinned dope solution prepared thereby.
The asymmetric membranes according to the present invention show good gas permeability and high permselectivity.

REFERENCES:
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patent: 4230463 (1980-10-01), Henis et al.
patent: 4774039 (1988-09-01), Wrasidlo
patent: 4871494 (1989-10-01), Kesting
patent: 4880441 (1989-11-01), Kesting et al.
patent: 4902422 (1990-02-01), Pinnau et al.
patent: 5061301 (1991-10-01), Kim et al.
Journal of Polymer Science: Part C: Polymer Letters, vol. 27, pp. 187-190, 1989, R. E. Kesting, "The Solvent Size Effect: Solvents and Solvent Complexes Viewed as Transient Templates Which Control Free Volume in the Skins of Integrally-Skinned Phase Inversion Membranes".
Journal of Membrane Science, vol. 60, pp. 219-232, 1991, Yong Soo Kang, et al., "Asymmetric Membrane Formation via Innersion Precipitation Method. I. Kinetic Effect".

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