Use of hydrophobically modified copolymers based on N-vinyl...

Details Use of hydrophobically modified copolymers based on N-vinyl... Use of hydrophobically modified copolymers based on N-vinyl...

2003-04-11

2008-03-25

Fortuna, Ana (Department: 1723)

Liquid purification or separation

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Material

C210S500290, C210S500340, C210S500360, C210S500400, C210S500410, C210S500420, C264S049000

Reexamination Certificate

active

07347938

ABSTRACT:
The present invention relates to the use of copolymers A containinga) from 50 to 99% by weight of at least one N-vinyllactam or N-vinylamine selected from the group consisting of N-vinylpyrrolidone, N-vinylpiperidone, N-vinylcaprolactam, N-vinylimidazole, methylated N-vinylimidazole, and N-vinylformamide, andb) from 1 to 50% by weight of at least one monomer selected from the group consisting ofb1) C8-C30-alkyl esters of monoethylenically unsaturated C3-C8carboxylic acids;b2) N—C8-C30-alkyl-substituted amides of monoethylenically unsaturated C3-C8carboxylic acids;b3) N,N—C8-C30-dialkyl-substituted amides of monoethylenically unsaturated C3-C8carboxylic acids;b4) vinyl esters of aliphatic C8-C30carboxylic acids; andb5) C8-C30-alkyl vinyl ethersto produce membranes.

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