BINDER COMPOSITION FOR SECONDARY BATTERY POSITIVE ELECTRODE, CONDUCTIVE MATERIAL PASTE COMPOSITION FOR SECONDARY BATTERY POSITIVE ELECTRODE, SLURRY COMPOSITION FOR SECONDARY BATTERY POSITIVE ELECTRODE, POSITIVE ELECTRODE FOR SECONDARY BATTERY AND METHOD OF PRODUCING SAME, AND SECONDARY BATTERY

A binder composition for a secondary battery positive electrode contains a specific polymer. The specific polymer includes a nitrile group-containing monomer unit and a linear alkylene structural unit having a carbon number of 4 or more. The pH of an extract of the specific polymer that is obtained by a specific method is 5.5 or higher.