COMPOSITION FOR NON-AQUEOUS SECONDARY BATTERY FUNCTIONAL LAYER AND METHOD OF PRODUCING SAME, FUNCTIONAL LAYER FOR NON-AQUEOUS SECONDARY BATTERY, NON-AQUEOUS SECONDARY BATTERY MEMBER, AND NON-AQUEOUS SECONDARY BATTERY

Provided is a composition for a non-aqueous secondary battery functional layer with which it is possible to form a functional layer that can cause a separator to display excellent shutdown function. The composition for a non-aqueous secondary battery functional layer contains organic particles A. The organic particles A contain a polymer X including an aromatic vinyl monomer unit in a proportion of 20 mass % or more and a wax having a melting point of lower than 95° C. The wax is preferably an ester wax.