Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1994-08-17
1995-05-23
Sellers, Robert E.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
428413, 428421, 428522, 525121, 5253262, 5253315, B32B 518, B32B 2708, C08G 5914
Patent
active
054180538
ABSTRACT:
A membrane useful as an ultrafiltration or reverse osmosis membrane is formed from the casting onto a substrate such as a porous polyester sheet a material comprising an epoxy- or trimethylene ether-direct grafted halogenated vinyl polymer prepared by the reaction of an epoxide such as a 5-ethyl,5'-methyl-hydantoin/epichlorohydrin condensation product with a halogenated vinyl polymer such as polyvinylidene fluoride in the presence of a metal halide catalyst. The ether residue of the epoxide or trimethylene-containing group is grafted directly to the first carbon-chain carbon of the halogenated vinyl polymer.
REFERENCES:
patent: 3288884 (1966-11-01), Sonnabend et al.
patent: 3321550 (1967-05-01), Hardman et al.
patent: 3579608 (1971-05-01), De Coste
patent: 3779982 (1973-12-01), Camp et al.
patent: 3784506 (1974-01-01), Vasta
Schonhorn et al. in Journal Adhesion Science Technology, vol. 3, No. 4, pp. 277-290 (1989).
Ramesh and De in Jouranl of Materials Science, vol. 26, pp. 2846-2850 (1991).
Koch Membrane Systems, Inc.
Sellers Robert E.
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