公开(公告)号：US12130586B2

公开(公告)日：2024-10-29

申请号：US17874745

申请日：2022-07-27

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Daisuke Tomita ,  Takahiro Yamashita ,  Yukiaki Nakamura ,  Takahisa Tatekawa ,  Masaru Takahashi

IPC: G03G9/087 ,  G03G9/08 ,  G03G9/09

CPC classification number: G03G9/08755 ,  G03G9/0804 ,  G03G9/0819 ,  G03G9/0904

Abstract: A method for producing a resin fine particle includes dissolving or melting an oily mixture containing at least a polyester resin, a base, and a basic dye while applying a shearing force to the oily mixture, and emulsifying the dissolved or molten oily mixture by adding a surfactant and an aqueous medium while applying a shearing force to the dissolved or molten oily mixture to prepare a dispersion liquid of the resin fine particle. The resin fine particle includes the polyester resin and the basic dye, has a volume average particle diameter of 0.05 μm or more and 1 μm or less, and has a ratio of a concentration of the basic dye in a center of gravity portion of the resin fine particle to a concentration of the basic dye in a surface layer portion having a depth of 10 nm or less from a surface of the resin fine particle of 0.8 or more.

公开(公告)号：US12105469B2

公开(公告)日：2024-10-01

申请号：US17400172

申请日：2021-08-12

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Atsushi Sugawara ,  Hiroshi Nakazawa

IPC: G03G9/087 ,  G03G9/08 ,  G03G9/097 ,  G03G15/08 ,  G03G21/18

CPC classification number: G03G9/0819 ,  G03G9/0804 ,  G03G9/08755 ,  G03G9/09733 ,  G03G15/08 ,  G03G21/1814

Abstract: An electrostatic charge image developing toner includes a toner particle containing a binder resin and a releasing agent, and the following requirement (1) is satisfied in cross section observation of the toner particle: requirement (1): the number of a releasing agent domain having a long diameter of 500 nm or more and 1,000 nm or less is 7 or more on average per toner particle.

公开(公告)号：US12078961B2

公开(公告)日：2024-09-03

申请号：US17407266

申请日：2021-08-20

Applicant: Yuka Mizoguchi ,  Hiroshi Yamashita ,  Junichi Watanabe ,  Tomomi Harashima

Inventor： Yuka Mizoguchi ,  Hiroshi Yamashita ,  Junichi Watanabe ,  Tomomi Harashima

IPC: G03G9/08 ,  G03G9/087 ,  G03G15/08

CPC classification number: G03G9/08755 ,  G03G9/0804 ,  G03G9/0821 ,  G03G9/08711 ,  G03G15/0813

Abstract: A toner includes a crystalline polyester resin and an amorphous polyester resin. A ratio of the storage modulus of the toner G′ (To) at a temperature To to the storage modulus of the toner G′ (To+3) at a temperature To+3 is greater than or equal to 10, in a case where the temperature To is within a range from 50° C. to 65° C.

公开(公告)号：US11841678B2

公开(公告)日：2023-12-12

申请号：US16967324

申请日：2019-02-08

Applicant: KAO CORPORATION

Inventor： Shoichi Murata ,  Manabu Suzuki ,  Yuki Wakabayashi

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/09 ,  G03G15/08

CPC classification number: G03G9/0804 ,  G03G9/0819 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/0904 ,  G03G15/08

Abstract: A method for producing a toner, including aggregating and coalescing resin particles and colorant particles in an aqueous medium. The resin particles contain, in the same or different particles, an amorphous polyester-based resin which is a polycondensate of an alcohol component containing an aromatic alcohol and a carboxylic acid component, and a crystalline polyester resin. The colorant particles contain a colorant and an addition polymer of a raw material monomer containing an addition-polymerizing monomer having an aromatic group. A ratio by mass of the colorant to the addition polymer in the colorant particles is 50/50 or more and 95/5 or less.

公开(公告)号：US20230324820A1

公开(公告)日：2023-10-12

申请号：US17943761

申请日：2022-09-13

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Yoshimasa FUJIHARA ,  Yukiaki Nakamura ,  Takahiro Yamashita

IPC: G03G9/08

CPC classification number: G03G9/0804

Abstract: A method for producing a toner for developing electrostatic charge images includes: preparing a first dispersion containing, dispersed therein, first aggregated particles containing a binder resin; preparing a second dispersion containing second aggregated particles dispersed therein, the second aggregated particles being prepared by attaching resin particles to surfaces of the first aggregated particles in the first dispersion; heating the second dispersion to a fusion temperature at which the second aggregated particles in the second dispersion are fused to each other; and holding the second dispersion at the fusion temperature. 20 mass% or more of a weak acid relative to the mass of the second aggregated particles is added to the second dispersion during the heating of the second dispersion or the holding of the second dispersion, or during the heating of the second dispersion and the holding of the second dispersion.

公开(公告)号：US11768446B2

公开(公告)日：2023-09-26

申请号：US16967274

申请日：2019-02-08

Applicant: KAO CORPORATION

Inventor： Shoichi Murata ,  Manabu Suzuki ,  Yuki Wakabayashi

IPC: G03G9/087 ,  G03G9/08 ,  G03G9/09

CPC classification number: G03G9/0804 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/0904

Abstract: A method for producing a toner, including aggregating and coalescing resin particles and colorant particles. The resin particles contain a composite resin containing a polyester resin segment, an addition polymer resin segment which is an addition polymerized product of a raw material monomer containing a styrenic compound, and a structural unit derived from a bireactive monomer bonding to the polyester resin segment and the addition polymer resin segment via a covalent bond. The colorant particles contain a colorant and an addition polymer of a raw material monomer containing a styrenic compound. The addition polymer contains a structural unit derived from the styrenic compound in the main chain. A ratio by mass of the colorant to the addition polymer in the colorant particles is 50/50 or more and 95/5 or less.

公开(公告)号：US20230266688A1

公开(公告)日：2023-08-24

申请号：US18168726

申请日：2023-02-14

Applicant: Junichi WATANABE ,  Kazuoki Fuwa ,  Yuka Mizoguchi ,  Toshihiko Sugiyama ,  Natsuko Matsushita

Inventor： Junichi WATANABE ,  Kazuoki Fuwa ,  Yuka Mizoguchi ,  Toshihiko Sugiyama ,  Natsuko Matsushita

IPC: G03G9/087 ,  G03G9/08 ,  G03G15/01

CPC classification number: G03G9/08755 ,  G03G9/0804 ,  G03G9/0825 ,  G03G15/0105

Abstract: Resin particles each include a binder resin. The binder resin includes an amorphous polyester resin and a crystalline resin. The amorphous polyester resin includes alcohol monomers as one of constituent components. The alcohol monomers include propylene glycol. Abundance of the crystalline resin in a region from an outermost surface of each of the resin particles to a depth of 150 nm from the outermost surface is 4% or less relative to an amount of the crystalline resin in an entire region of each of the resin particles. A radiocarbon 14C content of the resin particles is 5.4 pMC or greater.

公开(公告)号：US20230259049A1

公开(公告)日：2023-08-17

申请号：US17950472

申请日：2022-09-22

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Kazutsuna SASAKI

IPC: G03G9/08 ,  G03G9/093 ,  G03G9/087

CPC classification number: G03G9/0804 ,  G03G9/0819 ,  G03G9/09371 ,  G03G9/09328 ,  G03G9/08755

Abstract: A method for producing a toner for developing an electrostatic charge image includes: performing first aggregation involving aggregating at least resin particles and releasing agent particles to prepare a dispersion A that contains first aggregated particles that will form a core; performing second aggregation involving adding, to the dispersion A, a dispersion B that contains shell resin particles that will form a shell so as to cause the shell resin particles to adhere to the first aggregated particles and form second aggregated particles; and performing fusion involving heating and fusing the second aggregated particles to form toner particles, in which a solid component concentration (A) of the dispersion A and a solid component concentration (B) of the dispersion B satisfy a relationship, (A)

公开(公告)号：US20230236521A1

公开(公告)日：2023-07-27

申请号：US18007172

申请日：2020-12-03

Applicant: KAO CORPORATION

Inventor： Sumihiro SUZUKI ,  Takayuki KIBATA ,  Tsuyoshi ODA ,  Hiroshi MIZUHATA

IPC: G03G9/087 ,  G03G9/08

CPC classification number: G03G9/087 ,  G03G9/0804

Abstract: A method of producing a resin particle dispersion for toner, including, cooling a mixture including a resin particle dispersion containing an amorphous resin and a crystalline resin, and an aqueous medium. Where the cooling includes together fluidizing, continuously mixing, and continuously discharging the mixture of the resin particle dispersion and the aqueous medium.

公开(公告)号：US11675284B2

公开(公告)日：2023-06-13

申请号：US17144252

申请日：2021-01-08

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Shintaro Anno ,  Yoshimasa Fujihara ,  Atsushi Sugawara ,  Daisuke Noguchi ,  Satoshi Miura

IPC: G03G9/087 ,  G03G9/083 ,  G03G9/097 ,  G03G9/08 ,  G03G15/08

CPC classification number: G03G9/08755 ,  G03G9/0804 ,  G03G9/0819 ,  G03G9/0832 ,  G03G9/08782 ,  G03G9/09783 ,  G03G15/0865

Abstract: A toner for developing an electrostatic charge image contains toner particles containing at least one binder resin; the Mg element in an amount such that the net intensity of x-ray fluorescence from the Mg element in the toner is 0.10 kcps or more and 1.20 kcps or less; and at least one external additive including particles of a metal salt of a fatty acid.