Porous film including porous base and porous layer having inorganic particles and resin particles containing fluoro (meth)acrylate-containing or silicon-containing polymer, separator for secondary batteries, and secondary battery

A porous film comprising:

• a porous base;
• and
• a porous layer containing particles A and particles B disposed at least on one side thereof, wherein the particles A contain a copolymer containing:
• at least one selected from a monomer unit group a that consists of fluorine-containing (meth)acrylate monomer units and silicon-containing monomer units;
• and
• at least one monomer unit selected from a monomer unit group b that consists of acrylate monomer units having monocyclic hydrocarbon groups and methacrylate monomer units having monocyclic hydrocarbon groups, and
• wherein the particles B are inorganic particles,
• wherein the particles B present in the porous layer account for 70 mass % or more and 93 mass % or less of the total quantity, which accounts for 100 mass %, of all constituent components of the porous film,
• wherein the monomer units selected from the monomer unit group a and present in the particles A account for 25 mass % or more and 80 mass % or less, and
• wherein the particles A have a glass transition temperature of 30° C. or more and 80° C. or less.