COMPOSITION FOR NON-AQUEOUS SECONDARY BATTERY FUNCTIONAL LAYER, FUNCTIONAL LAYER FOR NON-AQUEOUS SECONDARY BATTERY, NON-AQUEOUS SECONDARY BATTERY COMPONENT, AND NON-AQUEOUS SECONDARY BATTERY

Provided is a composition for a non-aqueous secondary battery functional layer that has excellent slurry stability and can form a functional layer for which sufficient heat shrinkage resistance is ensured. The composition for a non-aqueous secondary battery functional layer contains organic particles, a water-soluble polymer, and water. The organic particles include a polyfunctional monomer unit in a proportion of not less than 20 mass % and not more than 95 mass %, and the water-soluble polymer includes a hydroxyl group-containing structural unit in a proportion of not less than 15 mass % and not more than 100 mass %.