Pvc hollow filtration membrane and the preparation method...

Details Pvc hollow filtration membrane and the preparation method... Pvc hollow filtration membrane and the preparation method...

2004-08-02

2008-10-14

Menon, Krishnan S (Department: 1797)

Liquid purification or separation

Filter

Material

C210S500420, C210S500270, C427S245000, C427S246000

Reexamination Certificate

active

07435348

ABSTRACT:
The present invention provides a polyvinyl chloride hollow filtration membrane, which mainly comprises the following components: 30-95 wt. % of polyvinyl chloride and 5-70 wt. % of vinyl chloride-vinyl acetate-maleic anhydride terpolymer, wherein the polymerization degree of polyvinyl chloride is from 700 to 2500; the content of vinyl acetate is 10-19 % and the content of maleic anhydride is 18-40 % on a basis of total weight of the terpolymer; and the absolute viscosity of the terpolymer is 1.2-1.9 mPa·s. A method for preparing such a polyvinyl chloride hollow filtration membrane is also provided in the present invention.

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patent: 2002-176862 (2002-06-01), None

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