Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1974-10-21
1978-08-29
Drummond, Douglas J.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156181, 427302, 429250, H01M 216
Patent
active
041101430
ABSTRACT:
This invention is directed to a process for forming a wettable battery separator comprising a non-woven mat of polyolefin fiber by forming a non-woven mat of polyolefin fiber having a thickness in the range 10 to 40 mils and pore sizes less than 40 microns, contacting the mat with an aqueous solution of a water soluble peroxy compound, e.g. hydrogen peroxide or potassium persulfate at a temperature below 70.degree. C., rinsing the mat in water and thereafter immersing the thus treated mat in an aqueous solution of a hydrophilic vinyl monomer such as acrylic, methacrylic, vinyl sulfonic acid, said solution containing a redox catalyst, e.g. an ion of a transition metal, e.g. ferrous, cerous, cobaltous, or an organic amine, thereby causing a graft polymerization of said hydrophilic vinyl monomer on said polyolefin mat to give a wettable polyolefin battery separator.
REFERENCES:
patent: 3020174 (1962-02-01), Natta et al.
patent: 3330702 (1967-07-01), Horowitz
patent: 3361842 (1968-01-01), Applegath et al.
patent: 3458597 (1969-07-01), Jabloner
patent: 3615995 (1971-10-01), Buntin et al.
patent: 3656884 (1972-04-01), Okaya et al.
patent: 3773590 (1973-11-01), Morgan
Cogliano Joseph A.
Marans Nelson S.
Ball Michael W.
Drummond Douglas J.
McDowell, Jr. William W.
Plunkett Richard P.
W. R. Grace & Co.
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