Method for making uniform polyvinylidene difluoride membranes

Details Method for making uniform polyvinylidene difluoride membranes Method for making uniform polyvinylidene difluoride membranes

1991-06-06

1993-03-23

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

21050042, 521145, 5253262, 526255, C08F 1422, B01D 7134

Patent

active

051965089

ABSTRACT:
A method is provided for enhancing the characteristics of a hydrophobic polyvinylidene difluoride membrane which comprises heating the membrane to a temperature of at least 80.degree. C. but less than the temperature at which the membrane softens and deforms for a time sufficient to achieve a state such that, when the membrane is subsequently hydrophilized, the membrane has substantially uniform hydrophilic properties.

REFERENCES:
patent: 4341615 (1982-07-01), Bachot
patent: 5079272 (1992-01-01), Allegrezza

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