Method of making thin-film composite membranes

Details Method of making thin-film composite membranes Method of making thin-film composite membranes

1993-04-27

1994-10-25

Dawson, Robert A.

Coating processes

With post-treatment of coating or coating material

Plural film forming coatings wherein one coating contains a...

427431, 427485, 21050021, 21050037, B05D 300

Patent

active

053587456

ABSTRACT:
A thin-film seimpermeable composite membrane employs the reaction product of N-alkyl phenylenediamine or N,N'-dialkyl phenylenediamine and a poly acyl halide, such as trimesoyl chloride. Preferably the membrane is post-treated with an acid solution followed by an aqueous solution of polyvinyl alcohol and a buffer and/or base to improve its physical properties.

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