An object of the invention is to provide a binder for a separator, which can be comprised by a non-aqueous electrolyte battery with improved heat resistance; a separator comprising the binder; and a non-aqueous electrolyte battery comprising the separator....

The process of the present invention can easily produce a solid polymer electrolyte having a high ion conductivity, by reacting an acrylic copolymer comprising structural units represented by the following formulas (I) and (II) with a compound represented ...