Method for producing hollow particles

A method for producing hollow particles which comprise a resin-containing shell and a hollow portion surrounded by the shell and which have a void ratio of 50% or more and 90% or less, the method comprising:

• a suspension step comprising carrying out a suspension treatment of a mixture liquid containing a polymerizable monomer for shell, a polar resin selected from the group consisting of polymers containing a repeating unit which contains a heteroatom, a hydrocarbon solvent, a dispersant, and an aqueous medium to prepare a suspension in which droplets of a monomer composition containing the polymerizable monomer for shell, the polar resin and the hydrocarbon solvent are dispersed in the aqueous medium,
• a polymerization step comprising subjecting the suspension to a polymerization reaction, and
• a hydrocarbon solvent removal step comprising removing the hydrocarbon solvent included in the hollow particles obtained by the polymerization step,
• wherein the polar resin is an acrylic polymer;
• the acrylic polymer as the polar resin is a copolymer of polymerizable monomers for polar resin, which include a methyl methacrylate and a polar group-containing (meth)acrylic monovinyl monomer;
• and with respect to a total mass (100% by mass) of the polymerizable monomers for polar resin, a copolymerization ratio of the methyl methacrylate is 50.0% by mass or more and 99.9% by mass or less, and a copolymerization ratio of the polar group-containing (meth)acrylic monovinyl monomer is 0.1% by mass or more and 5.0% by mass or less, and
• wherein the dispersant is at least one selected from the group consisting of magnesium hydroxide, calcium hydroxide, barium hydroxide and calcium phosphate.