Patent ID: 11859075
Assignee: DAIKIN INDUSTRIES, LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method for producing a core-shell particle, comprising adding a non-fluorine monomer to a perfluoropolymer dispersion and polymerizing the non-fluorine monomer to produce the core-shell particle,
the polymerization being initiated by simultaneously adding the non-fluorine monomer and a polymerization initiator to the perfluoropolymer dispersion,
wherein the core-shell particle comprises a core containing the perfluoropolymer and a shell containing a non-fluorine resin, the core having a periphery coated with the non-fluorine resin at a coverage of 90% or more,
the perfluoropolymer is a polymer containing a polymerized unit based on a perfluoro monomer in an amount of 90 mol % or more relative to all polymerized units,
the shell has a mass of 20 or less and the core has a mass of 80 or more relative to a total mass of the core and the shell of 100,
the core has an average particle size of 50 nm or more, and
the shell has a thickness of 1 to 300 nm.