Binder dispersion for nonaqueous secondary battery separator, slurry composition, nonaqueous secondary battery separator, and nonaqueous secondary battery

Provided are a binder dispersion having excellent electrolyte resistance, a slurry composition having excellent solution stability and coatability, a separator having low water content and excellent heat resistance and adhesion to a separator base material, and a non-aqueous secondary battery having low internal resistance and good cycle characteristics. The present invention solves the problem to be solved by using a binder dispersion for a non-aqueous secondary battery separator, the binder dispersion comprising a polymer (A1) and an aqueous medium. The polymer (A1) has an acid value of 15 mgKOH/g or less, and is an ethylenically unsaturated monomer mixture containing (meth) acrylamide and a nonionic ethylenically unsaturated monomer (a-1), the logarithm of the octanol/water partition coefficient (Log Kow) of the nonionic ethylenically unsaturated monomer (a-1) at 25 DEG C being a specific value, and the polymer (A1) having a solid component concentration of 5% by mass at 25 DEG C being an ethylenically uns