Process for producing hydrophilic polymer membranes

Details Process for producing hydrophilic polymer membranes Process for producing hydrophilic polymer membranes

1993-09-28

1994-10-18

Lipman, Bernard

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ion-exchange polymer or process of preparing

20415787, 2041579, 428290, 428333, 521 31, 521 51, C08J 520

Patent

active

053569369

ABSTRACT:
Hydrophilicity of hydrophilic polymers, in the form of heat-crosslinked cings on porous membranes, is increased by exposure to an oxygen plasma, preferably for about 60 seconds. The plasma is generated at an oxygen gas pressure of about 1.5 Torrs in a chamber subjected to radio frequency electromagnetic radiation with a power of 25-100 watts. Such highly hydrophilic membranes have increased efficiency and durability when used as ultrafiltration membranes for separating hydrophobic and hydrophilic materials, such as smoke-air and oil-water mixtures.

REFERENCES:
patent: 5147549 (1992-09-01), Chou et al.

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