Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1988-10-11
1991-02-12
Hoke, Veronica P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 61, 521 79, 428159, 528125, 528126, 528128, C08H 928
Patent
active
049924850
ABSTRACT:
A microporous polyetheretherketone (PEEK) membrane in the form of films and hollow fibers formed without sulfonating the PEEK polymer. Solid fibers and articles are also claimed. A method of making membranes, fibers and articles from solutions of PEEK in non-sulfonating acid solvents in claimed. Solvents include methane sulfonic acid and trifluoromethane sulfonic acid. Sulfuric acid may be used as a diluent in non-sulfonating amounts. PEEK membranes are used as supports for composite ultrafiltration and reverse osmosis membranes. A method of making membranes, fibers, and articles is also described.
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M. T. Bishop et al., "Solubility and Properties of a Poly(aryl ether ketone) in Strong Acids"; Macromolecules, 1985, ACS, vol. 18, pp. 86-93.
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C. Kamizawa, M. Matsuda, and R. Kobayashi, "Preparation of Two Types of Ultrafiltration Membranes Using Organic Solvents as the Gelating Solutions", Proceeding of the International Congress on Membrane and Membrane Processes at Tokyo, Japan (1987).
Dr. Klaus Dahl (Raychem Corporation), "Heat Resistant Semicrystalline Poly(phenylene ether ketones) Melt Processable High Performance Polymers", 36th Industrial Affiliates Symposium on High Performance Polymers, Departments of Chemistry and Chemical Engineering, Stanford University, Dec. 3-5, 1986.
Bishop Matthew T.
Chau Chieh-Chun
Koo Ja-Young
Racchini Joel R.
Wessling Ritchie A.
Filmtec Corporation
Hoke Veronica P.
Ladd Thomas A.
The Dow Chemical Company
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