A binder for a nonaqueous electrolyte secondary battery electrode, containing a crosslinked polymer or salt thereof having a carboxyl group and a use thereof, and a method of manufacturing the polymer or salt. The polymer has a structural unit derived from an ethylenically unsaturated carboxylic acid monomer in an amount of 50 to 99 mass % of total structural units and a structural unit derived from a nonionic ethylenically unsaturated monomer in an amount of 1 to 50 mass % of the total structural units, the monomer is a compound having a substituent with a carbon atom number of 6 or more, and a particle diameter of the crosslinked polymer is 0.1 to 7.0 μm in a volume-based median diameter when the crosslinked polymer is neutralized to a neutralization degree of 80 to 100 mol %, subjected to water swelling in water, and then dispersed in a 1 mass % NaCl aqueous solution.
一种用于非
水电解质二次电池电极的粘结剂,含有一种具有羧基的交联聚合物或其盐及其用途,以及一种制造该聚合物或盐的方法。该聚合物具有来自
乙烯基不饱和
羧酸单体的结构单元,其数量占总结构单元的 50 至 99 质量%,以及来自非离子
乙烯基不饱和单体的结构单元,其数量占总结构单元的 1 至 50 质量%,该单体是具有碳原子数为 6 或更多的取代基的化合物,交联聚合物的颗粒直径为 0.当交联聚合物的中和度为 80 至 100 mol%,在
水中进行
水溶胀,然后分散在 1 质量%的 NaCl
水溶液中时,其基于体积的中值直径为 0.1 至 7.0 μm。