05736051 is referenced by 40 patents and cites 81 patents.

The present invention provides an isotropic, skinless, porous, polyvinylidene fluoride membrane having a K.sub.UF of at least about 15 psi (103 kPa), and preferably below about 50 psi (345 kPa), when tested using liquid pairs having an interfacial tension of about 4 dynes/cm (4 mN/m). The present inventive membrane preferably has a titer reduction of at least about 10.sup.8 against T.sub.1 bacteriophage, more preferably also against PR772 coliphage, and even more preferably also against PP7 bacteriophage. The present inventive membrane can have a thickness of about 20 mil (500 .mu.m) or less and even as low as about 5 mil (125 .mu.m) or less. The present invention also provides a method of preparing such a membrane by providing a casting solution comprising polyvinylidene fluoride and a solvent therefor, heating the casting solution to a uniform temperature of about 57.degree. C. to about 60.degree. C., spreading the casting solution onto a substrate to form a film, quenching the film in a quench bath so as to form a porous membrane, and washing and drying the porous membrane.

Title
Polyvinylidene fluoride membrane and method for removing viruses from solutions
Application Number
173755
Publication Number
5736051
Application Date
October 24, 1994
Publication Date
April 7, 1998
Inventor
Joseph Gregg
Glen Head
NY, US
Gregory C Rapisarda
West Islip
NY, US
Ioannis P Sipsas
Forest Hills
NY, US
Peter John Degen
Huntington
NY, US
Agent
Leydig Voit & Mayer
Assignee
Pall Corporation
NY, US
IPC
C12Q 1/70
C12N 7/00
B01D 71/32
B01D 69/02
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