Treating hydrophobic filters to render them hydrophilic

Details Treating hydrophobic filters to render them hydrophilic Treating hydrophobic filters to render them hydrophilic

1984-02-27

1985-06-25

Lusignan, Michael R.

Coating processes

Medical or dental purpose product; parts; subcombinations;...

Particulate or unit-dosage-article base

2105002, 427244, 4283157, 428341, 604126, 604190, 604405, A01N 102, B05D 500

Patent

active

045253749

ABSTRACT:
A method is described for coating a hydrophobic filter membrane so as to render said membrane hydrophilic. This method is particularly for treating polypropylene or polytetrafluoroethylene in which the filter membrane is contemplated to have a pore size not larger than two (2) microns. The treating solution has Triethanolamine Dodecylbenzene Sulfonate (LAS) as the active ingredient. This treatment may use heated air (125.degree. to 200.degree. F.) as a drying assist which renders the membrane to have a substantially instantaneous "wet-out".

REFERENCES:
patent: 3853601 (1974-12-01), Taskier
patent: 4346142 (1982-08-01), Lazear
patent: 4359510 (1982-11-01), Taskier
patent: 4413074 (1983-11-01), Wrasidle et al.

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