申请人:Kyoritsu Chemical & Co., Ltd.
公开号:EP2687566A1
公开(公告)日:2014-01-22
This is to provide an aqueous metal surface treatment agent for a lithium ion secondary battery which can improve interlaminar adhesiveness between a metal member and a resin coating layer such as a film or a coated film, and solvent resistance without using trivalent chromium.
The aqueous metal surface treatment agent for a lithium ion secondary battery comprises a polyvinyl alcohol resin containing 2 to 15 mol% of a 1,2-diol structural unit represented by the formula (1):
having a degree of saponification of 90 to 99.9 mol% and an average degree of polymerization of 250 to 3000; and a metallic crosslinking agent.
目的是提供一种用于锂离子二次电池的水性金属表面处理剂,它可以在不使用三价铬的情况下提高金属构件与树脂涂覆层(如薄膜或涂覆膜)之间的层间粘合性和耐溶剂性。
锂离子二次电池用水性金属表面处理剂包括一种聚乙烯醇树脂,其中含有 2 至 15 摩尔%由式(1)表示的 1,2-二醇结构单元:
皂化度为 90 至 99.9 摩尔%,平均聚合度为 250 至 3000;以及一种金属交联剂。