Method for preparation of semipermeable composite membrane

Details Method for preparation of semipermeable composite membrane Method for preparation of semipermeable composite membrane

1984-11-26

1986-08-19

Lawrence, Evan K.

Coating processes

Foraminous product produced

Filter, sponge, or foam

21050028, 21052037, 264 41, 427340, 427342, B05D 310, B05D 500

Patent

active

046069437

ABSTRACT:
An excellent reverse osmosis membrane having a high flux with superior chlorine resistance and low salt passage can be obtained by interfacially condensing a water soluble aromatic polyamide prepolymer with an essentially monomeric, aromatic, amine reactive polyfunctional acyl halide. The polyamide prepolymer may be prepared through the condensation reaction of an aromatic diamine and an aromatic anhydride acyl halide. Preferably the amide prepolymer, prepared from metaphenylene diamine and trimelletic anhydride acid chloride, is reacted with trimesoylchloride to form the thin film membrane of the subject invention.

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Odian, G., "Principles of Polymerization", second edition, New York, John Wiley & Sons, 1981, pp. 152-154.

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