The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 1994
Filed:
Mar. 25, 1993
Masanao Tanaka, Ibaraki, JP;
Nobutoshi Tokutake, Ibaraki, JP;
Yoshihiko Kondo, Ibaraki, JP;
Hiroaki Yamazaki, Ibaraki, JP;
Masaki Hirooka, Ibaraki, JP;
Koji Kimura, Ibaraki, JP;
Japan Vilene Co., Ltd., Tokyo, JP;
Abstract
A battery separator comprising a sheet material containing a polyvinyl alcohol cross-linked by a cross-linking group of the general formula (I): ##STR1## wherein A represents a group of --CH.dbd.CH--R.sub.1 or ##STR2## R.sub.1 represents an optionally substituted quaternary nitrogen-containing aromatic heterocyclic group, R.sub.2 and R.sub.3 independently represent a hydrogen atom or alkoxy group having 1 to 4 carbon atoms, m is o or 1, and n is an integer of 1 to 6, is disclosed. The separator exhibits a good resistance to electrolyte, electrolyte holding rate, and resistant to short-circuits.