| abstract |
A binder composition exhibiting excellent electrolytic solution resistance, a slurry composition exhibiting excellent stability, a positive electrode having high flexibility, smoothness and binding properties, and a secondary battery having excellent high-temperature cycle characteristics provide. A binder containing a polymer unit having a nitrile group, an aromatic vinyl polymer unit, a polymer unit having a hydrophilic group, and a linear alkylene polymer unit having 4 or more carbon atoms, the aromatic vinyl polymer unit The binder composition for secondary battery positive electrodes whose content rate is 5-50 mass%. [Selection figure] None |