公开(公告)号：US20090161295A1

公开(公告)日：2009-06-25

申请号：US12090161

申请日：2006-10-16

申请人： Shinsuke Kuroda ,  Shinya Sasada ,  Kazumitsu Honda ,  Keiko Hamada

发明人： Shinsuke Kuroda ,  Shinya Sasada ,  Kazumitsu Honda ,  Keiko Hamada

IPC分类号： H01G9/02 ,  H01G9/022

CPC分类号： H01G9/035

摘要： The present invention has its object to provide an electrolyte anion which is high in decomposition temperature, in order to inhibit the electrolyte anion in the electrolyte solution for electrolytic capacitors from undergoing decarboxylation in the lead-free solder reflowing step to thereby prevent valve opening.The present invention uses an electrolyte solution comprising, as an electrolyte, the salt (A) composed of ammonium cation (a) and a polybasic carboxylic acid (b) anion, wherein the proton part charge of each carboxyl group in the polybasic carboxylic acid (b) as calculated by the quantum mechanics calculation software CAChe-based AM1 method is not higher than 0.243. Preferred is the polybasic carboxylic acid (b) represented by the general formula (1): wherein R1 to R4 may be the same or different and each represents a hydrogen atom, a functional group or a hydrocarbon group containing 1 to 3 carbon atoms, which may optionally contain a functional group, provided that at least one of R1 to R4 is an electron-donating group.

摘要翻译： 本发明的目的是提供一种分解温度高的电解质阴离子，以便在无铅焊料回流步骤中抑制用于电解电容器的电解质溶液中的电解质阴离子经历脱羧，从而防止阀打开。 本发明使用包含由铵阳离子（a）和多元羧酸（b）阴离子构成的盐（A）作为电解质的电解质溶液，其中多元羧酸中的每个羧基的质子部分电荷（ b）由量子力学计算软件CAChe计算的AM1方法不高于0.243。 优选由通式（1）表示的多元羧酸（b）：其中R 1至R 4可以相同或不同，并且各自表示氢原子，官能团或含有1至3个碳原子的烃基，其中 可以任选地含有官能团，条件是R 1至R 4中的至少一个是给电子基团。