Coating processes – Foraminous product produced – Filter – sponge – or foam
Patent
1987-08-17
1989-06-13
Henderson, Christopher
Coating processes
Foraminous product produced
Filter, sponge, or foam
21050027, 21050041, 4273935, 427399, 4274121, B32B 2700
Patent
active
048392030
ABSTRACT:
A novel composite membrane and methods of making the membrane are described. The discriminating layer of the membrane is prepared by reaction of a reactive cationic compound group with a compound bearing a nucleophilic moiety. At least one of the reactants bears an average of two or more reactive groups. The reaction product contains covalent bonds formed via charge eliminating reactions.
In a preferred embodiment of the invention, the nucleophilic group is anionic and a coacervate is formed initially on a microporous substrate. The resulting membrane may be useful for reverse osmosis, gas or ultrafiltration separations.
REFERENCES:
patent: 2676166 (1954-04-01), Webers
patent: 2891025 (1959-06-01), Price
patent: 3078259 (1963-02-01), Hatch et al.
patent: 3269991 (1966-08-01), La Combe
patent: 3276598 (1966-10-01), Michaels et al.
patent: 3335100 (1967-08-01), Geyer
patent: 3419430 (1968-12-01), Michaels
patent: 3419431 (1968-12-01), Michaels
patent: 3429839 (1969-02-01), Franco
patent: 3467604 (1969-09-01), Michaels
patent: 3544499 (1970-12-01), Hatch
patent: 3546142 (1970-12-01), Michaels et al.
patent: 3578458 (1971-05-01), Taylor
patent: 3637432 (1972-01-01), Gibbs et al.
patent: 3737045 (1973-06-01), Hashimoto et al.
patent: 3804797 (1974-04-01), Broxterman et al.
patent: 3962165 (1976-06-01), Bosso et al.
patent: 3963662 (1976-06-01), Fujiwara et al.
patent: 3965032 (1976-06-01), Gibbs et al.
patent: 3998776 (1976-12-01), Wagener et al.
patent: 4017372 (1977-04-01), Wagener et al.
patent: 4096154 (1978-06-01), Rempfler et al.
patent: 4214096 (1980-07-01), Klingler et al.
patent: 4225407 (1980-09-01), Wagener et al.
patent: 4337185 (1982-06-01), Wessling et al.
patent: 4360434 (1982-11-01), Kawaguchi et al.
patent: 4383073 (1983-05-01), Wessling et al.
patent: 4426489 (1984-01-01), Wessling et al.
patent: 4431768 (1984-02-01), Wessling et al.
patent: 4432875 (1984-02-01), Wrasidlo et al.
patent: 4444977 (1984-04-01), Aikawa et al.
K. C. Frisch et al., Polyelectrolytes, pp. 34-42, Technomic Publishing, (1976).
D. R. Crist et al., Angew Chem. Int. Ed., vol. 8, No. 12, pp. 962-974, (1969).
D. L. Schmidt et al., J. of Paint Tech., vol. 46, No. 588, pp. 41-46, (1974).
G. D. Jones, Polyelectrolytes, pp. 144-176, Technomic Publ., (1976).
J. V. Crivello, Adv. Poly. Sci., 62, pp. 29-30, (1984).
T. Saegusa et al., Poly. Bull., 1, pp. 171-176, (1978).
I. Murase et al., Poly. Comm., 25, pp. 327-329, (1984).
D. R. Gagnon et al., Poly. Bull., 12, pp. 293-298, (1984).
M. Hatch, Prog. Org. Coatings, 1, pp. 61-78, (1976).
Davis Thomas E.
Fibiger Richard F.
Kau Jee I.
Pickelman Dale M.
Schmidt Donald L.
Glenn Michael L.
Henderson Christopher
Lodd Thomas A.
The Dow Chemical Company
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