Process for preparing microporous polyvinylidene fluoride membra

Details Process for preparing microporous polyvinylidene fluoride membra Process for preparing microporous polyvinylidene fluoride membra

1988-06-13

1989-02-21

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

264 49, 21050042, 521 61, 521 64, 521145, C08J 926, C08J 928

Patent

active

048062910

ABSTRACT:
A process for preparing assymetric polyvinylidene fluoride microporous membranes using novel pore forming agents of an ammonium salt which is a non-solvent for the polymeric casting solution; such agents for example being ammonium hydroxide, ammonium chloride and the like.

REFERENCES:
patent: 3620895 (1971-11-01), Bailey
patent: 3642668 (1972-02-01), Bailey et al.
patent: 4076656 (1978-02-01), White et al.
patent: 4238571 (1980-12-01), Mano

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