公开(公告)号：US20200348609A1

公开(公告)日：2020-11-05

申请号：US16957596

申请日：2018-12-27

Applicant: ZEON CORPORATION

Inventor： Masashi Watanabe

IPC: G03G9/087 ,  G03G9/097 ,  G03G9/09 ,  G03G9/113

Abstract: The present invention provides a toner for electrostatic-image development comprising color resin particle containing a binder resin, a colorant, a charge control agent, and a thickener, wherein the binder resin is a copolymer including styrene-monomer unit and (meth)acrylate monomer unit, the thickener is a resin containing a nitrogen atom, and the content of nitrogen atom is 150 to 1500 mass ppm in the toner for electrostatic-image development.

公开(公告)号：US20250059339A1

公开(公告)日：2025-02-20

申请号：US18720891

申请日：2022-12-21

Applicant: ZEON CORPORATION

Inventor： Masashi Watanabe

IPC: C08J9/32 ,  B01J13/18 ,  B01J13/20 ,  C08L23/12

Abstract: To provide hollow particles excellent in pressure resistance. Hollow particles which comprise a shell containing a resin and a hollow portion surrounded by the shell, wherein a void ratio is 50% or more, and wherein a residual void ratio measured by a specific press test method is 30% or more.

公开(公告)号：US20240109991A1

公开(公告)日：2024-04-04

申请号：US18276745

申请日：2022-02-18

Applicant: ZEON CORPORATION

Inventor： Masashi Watanabe

IPC: C08F220/26

CPC classification number: C08F220/26

Abstract: To provide hollow particles having a high void ratio and excellent pressure resistance. Hollow particles which comprise a shell containing a resin and a hollow portion surrounded by the shell, wherein a void ratio is 60% or more; wherein a volume average particle diameter is from 10 μm to 50 μm; wherein the shell contains, as the resin, a polymer in which from 70 parts by mass to 100 parts by mass of a crosslinkable monomer unit is contained in 100 parts by mass of all monomer units, and the crosslinkable monomer unit contains a bifunctional crosslinkable monomer unit derived from a bifunctional crosslinkable monomer and a trifunctional or higher-functional crosslinkable monomer unit derived from a trifunctional or higher-functional crosslinkable monomer; and wherein, when observed in plan view, a percentage of particles having a dent with a size of 5% to 50% of the particle diameter, is 10% or less.

公开(公告)号：US20230381731A1

公开(公告)日：2023-11-30

申请号：US18027676

申请日：2021-09-28

Applicant: ZEON CORPORATION

Inventor： Masashi Watanabe

IPC: B01J13/18 ,  B01J13/20 ,  C08F222/10 ,  C08L35/02

CPC classification number: B01J13/185 ,  B01J13/206 ,  C08F222/102 ,  C08L35/02 ,  C08F2810/20 ,  C08F2800/20

Abstract: A method for producing hollow particles, the method comprising: preparing a mixture liquid containing a first polymerizable monomer, a hydrocarbon solvent, a dispersion stabilizer and an aqueous medium, suspending the mixture liquid to prepare a suspension in which droplets of a monomer composition containing the first polymerizable monomer and the hydrocarbon solvent are dispersed in the aqueous medium, and subjecting the suspension to a polymerization reaction, wherein the mixture liquid contains a crosslinkable monomer as the first polymerizable monomer in an amount of 75 to 100 parts by mass per 100 parts by mass of the first polymerizable monomer, and wherein, during the polymerization reaction, when a polymerization conversion rate of the first polymerizable monomer reaches 93% by mass or more, a second polymerizable monomer having a solubility of 0.3 g/L or more in distilled water at 20° C., is added to the suspension and further subjected to the polymerization reaction.

公开(公告)号：US11754936B2

公开(公告)日：2023-09-12

申请号：US17283088

申请日：2019-10-07

Applicant: ZEON CORPORATION ,  NOF CORPORATION

Inventor： Masashi Watanabe ,  Takeshi Yoshimura ,  Norifumi Itako

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

CPC classification number: G03G9/09733 ,  G03G9/0819

Abstract: Provided is a wax which is used in a toner, whereby the toner is excellent in low-temperature fixability and heat-resistant shelf stability, the glossiness is improved as compared with the prior art, and the generation of ultrafine particles and the bleeding of the wax are not likely to occur. The wax for toners, wherein the wax is an ester wax generated by esterification of a pentaerythritol and a monocarboxylic acid; wherein the monocarboxylic acid used for the esterification contains a behenic acid, an arachidic acid and a stearic acid; and wherein, with respect to 100% by mass of the monocarboxylic acid, a content ratio of the behenic acid is from 60% by mass to 80% by mass; a content ratio of the arachidic acid is from 5% by mass to 15% by mass; and a content ratio of the stearic acid is from 15% by mass to 25% by mass.

公开(公告)号：US10901334B2

公开(公告)日：2021-01-26

申请号：US16628389

申请日：2018-07-12

Applicant: ZEON CORPORATION

Inventor： Masashi Watanabe

IPC: G03G9/00 ,  G03G9/09

Abstract: Provided is a magenta toner which exhibits high image density and chroma, has excellent low-temperature fixability, shelf stability and charging ability, is unlikely to fog, and can be produced at low cost. The magenta toner contains a binder resin and a magenta colorant, wherein the magenta toner contains C.I. Pigment Red 122, C.I. Pigment Violet 19 and a compound A represented by the following general formula (1) as the magenta colorant, and wherein, with respect to 100 parts by mass of the binder resin, a total of from 3 to 30 parts by mass of the C.I. Pigment Red 122, the C.I. Pigment Violet 19 and the compound A are contained, and a mass ratio of a total content of the C.I. Pigment Red 122 and the C.I. Pigment Violet 19 to a content of the compound A {(PR122+PV19)/the compound A} is from 1 to 20:

公开(公告)号：US20200218172A1

公开(公告)日：2020-07-09

申请号：US16628389

申请日：2018-07-12

Applicant: ZEON CORPORATION

Inventor： Masashi Watanabe

IPC: G03G9/09

Abstract: Provided is a magenta toner which exhibits high image density and chroma, has excellent low-temperature fixability, shelf stability and charging ability, is unlikely to fog, and can be produced at low cost. The magenta toner contains a binder resin and a magenta colorant, wherein the magenta toner contains C.I. Pigment Red 122, C.I. Pigment Violet 19 and a compound A represented by the following general formula (1) as the magenta colorant, and wherein, with respect to 100 parts by mass of the binder resin, a total of from 3 to 30 parts by mass of the C.I. Pigment Red 122, the C.I. Pigment Violet 19 and the compound A are contained, and a mass ratio of a total content of the C.I. Pigment Red 122 and the C.I. Pigment Violet 19 to a content of the compound A {(PR122+PV19)/the compound A} is from 1 to 20:

公开(公告)号：US12276937B2

公开(公告)日：2025-04-15

申请号：US17276580

申请日：2019-09-13

Applicant: ZEON CORPORATION

Inventor： Masashi Watanabe

IPC: G03G9/09 ,  G03G9/08

Abstract: Provided is a magenta toner which shows sharper color and higher reflection density than ever before, which is excellent in balance between low-temperature fixability and heat-resistant shelf stability, and which has excellent printing durability. Also provided is a method for producing the magenta toner. The magenta toner contains a binder resin and a magenta colorant, wherein a magenta pigment A, which is obtained by surface-treating a pigment represented by the following formula (1) with a metal rosinate, is contained as the magenta colorant; wherein a content of the magenta pigment A is from 1 part by mass to 5 parts by mass with respect to 100 parts by mass of the binder resin; and wherein the metal rosinate is contained at from 1 part by mass to 7 parts by mass with respect to 100 parts by mass of the magenta pigment A:

公开(公告)号：US20230416513A1

公开(公告)日：2023-12-28

申请号：US18027475

申请日：2021-09-28

Applicant: ZEON CORPORATION

Inventor： Masashi Watanabe

IPC: C08L23/12 ,  C08L23/26 ,  C08F222/06 ,  C08F222/10

CPC classification number: C08L23/12 ,  C08L23/26 ,  C08F222/06 ,  C08L2205/02 ,  C08L2205/20 ,  C08L2207/04 ,  C08F222/102

Abstract: To provide such a resin composition, that even though it contains hollow particles, when it is molded into a molded body, a deterioration in the physical properties of the molded body is suppressed. A resin composition comprising: a thermoplastic elastomer having an acid value of less than 3.0 mgKOH/g, hollow particles which comprise a shell containing a resin and a hollow portion surrounded by the shell and which contain, as the resin, a polymer in which from 30 parts by mass to 100 parts by mass of a crosslinkable monomer unit is contained in 100 parts by mass of all monomer units, and an acid-modified polyolefin-based resin having an acid value of 3.5 mgKOH/g or more.

公开(公告)号：US20220410111A1

公开(公告)日：2022-12-29

申请号：US17778520

申请日：2020-12-02

Applicant: ZEON CORPORATION

Inventor： Masashi Watanabe

IPC: B01J13/18 ,  C08F2/18 ,  C08F220/14

Abstract: Provided are hollow particles which have a high void ratio, hardly collapse, and have a reduced amount of volatile compounds. The hollow particles comprising a shell and a hollow portion surrounded by the shell, and having a void ratio of 50% or more and 90% or less, wherein the shell has a thickness of 0.2 μm or more and 0.9 μm or less, and the shell contains a polymer derived from a polymerizable monomer for shell, which is composed of 70% by mass or more and 100% by mass or less of a crosslinkable monomer and 0% by mass or more and 30% by mass or less of a non-crosslinkable monomer, and a polar resin selected from the group consisting of polymers containing a repeating unit which contains a hetero atom.