POLYMER, BINDER RESIN, COMPOSITION FOR IONICALLY CONDUCTIVE POLYMER ELECTROLYTE, AND SECONDARY BATTERY

摘要

The invention provides a novel polymeric compound comprising polyvinyl alcohol units and having an average degree of polymerization of at least 20, in which some or all of the hydroxyl groups on the polyvinyl alcohol units are substituted with oxyalkylene-containing groups to an average molar substitution of at least 0.3; a binder resin composed of this polymeric compound; an ion-conductive polymer electrolyte composition having a high ionic conductivity and high tackiness which lends itself well to use as a solid polymer electrolyte in film-type cells and related applications; and a secondary cell.