US 12,325,766 B2
Fine resin particles and method for producing the same
Kohei Tanaka, Shiga (JP)
Assigned to SEKISUI KASEI CO., LTD., Osaka (JP)
Appl. No. 17/635,818
Filed by SEKISUI KASEI CO., LTD., Osaka (JP)
PCT Filed Aug. 25, 2020, PCT No. PCT/JP2020/032051
§ 371(c)(1), (2) Date Feb. 16, 2022,
PCT Pub. No. WO2021/039798, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 2019-156171 (JP), filed on Aug. 28, 2019; and application No. 2020-010139 (JP), filed on Jan. 24, 2020.
Prior Publication US 2022/0306784 A1, Sep. 29, 2022
Int. Cl. C08F 220/14 (2006.01); C08F 2/00 (2006.01); C08F 2/30 (2006.01); C08F 212/08 (2006.01); C08F 222/10 (2006.01); C08J 3/12 (2006.01)
CPC C08F 220/14 (2013.01) [C08F 2/001 (2013.01); C08F 2/30 (2013.01); C08F 212/08 (2013.01); C08F 222/102 (2020.02); C08J 3/122 (2013.01)] 12 Claims
 
1. Fine resin particles comprising a polymer of a mixture solution of a vinyl monomer and a monomer containing a reactive surfactant having a polyoxyalkylene chain in a molecule thereof,
wherein a volume-average particle size of the fine resin particles is 50 to 500 nm,
a gel fraction of the fine resin particles is 93% or more,
a solvent resistance index of the fine resin particles is 10 or less,
an amount of residual surfactant is 0.01 to 1 part by mass relative to 100 parts by mass of the fine resin particles,
a vinyl polymer chain of the fine resin particles is terminated with a hydroxy group derived from a polymerization initiator, and
the reactive surfactant having the polyoxyalkylene chain in a molecule thereof is a surfactant having, in a molecule thereof, a double bond that allows copolymerization with a monomer in a polymerization system and a polyoxyalkylene chain, and having a reactive group selected from the group consisting of a propenyl group, an allyl group, an isopropenyl group, an acrylate group, and a methacrylate group.