US 11,993,668 B2
Pressure-responsive particles, cartridge, apparatus for manufacturing printed matter, method for manufacturing printed matter, printed matter, sheet for manufacturing printed matter, and method for manufacturing sheet for manufacturing printed matter
Yoshifumi Iida, Kanagawa (JP); Takashi Hasegawa, Kanagawa (JP); Satomi Kashiwagi, Kanagawa (JP); Takako Kobayashi, Kanagawa (JP); and Satoshi Inoue, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Jan. 15, 2021, as Appl. No. 17/149,739.
Claims priority of application No. 2020-147776 (JP), filed on Sep. 2, 2020.
Prior Publication US 2022/0064346 A1, Mar. 3, 2022
Int. Cl. C08F 212/08 (2006.01); B41J 2/32 (2006.01); B41L 43/02 (2006.01); B41M 5/00 (2006.01); B41M 5/50 (2006.01); C08F 6/18 (2006.01); C08L 25/14 (2006.01); C08L 33/08 (2006.01); C09D 125/14 (2006.01); C09D 133/08 (2006.01)
CPC C08F 212/08 (2013.01) [B41J 2/32 (2013.01); B41L 43/02 (2013.01); B41M 5/00 (2013.01); B41M 5/0023 (2013.01); B41M 5/50 (2013.01); C08F 6/18 (2013.01); C08L 25/14 (2013.01); C08L 33/08 (2013.01); C09D 125/14 (2013.01); C09D 133/08 (2013.01); C08L 2207/53 (2013.01)] 27 Claims
OG exemplary drawing
 
1. Pressure-responsive particles comprising:
pressure-responsive base particles; and
fatty acid metal salt particles,
wherein the pressure-responsive base particles contain a styrene-based resin which contains styrene and other vinyl monomers as polymerization components and a (meth)acrylic acid ester-based resin which contains at least two kinds of (meth)acrylic acid esters as polymerization components and in which a mass ratio of the (meth)acrylic acid esters to all polymerization components is 90% by mass or higher,
the pressure-responsive particles have at least two glass transition temperatures, and
a difference between a lowest glass transition temperature and a highest glass transition temperature is 30° C. or higher of the pressure-responsive particles,
the pressure-responsive particles has a core portion in which island phases are present and a shell layer in which no island phase is present, and the sea phase contains the styrene-based resin, and the island phases contain the (meth)acrylic acid ester-based resin.