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公开(公告)号：US10120296B2
公开(公告)日：2018-11-06
申请号：US15710259
申请日：2017-09-20
Applicant: Konica Minolta, Inc.
Inventor： Kaori Matsushima , Noboru Ueda , Shiro Hirano , Kouji Sugama
Abstract: An electrostatic latent image developing toner includes toner particles which comprises a binder resin and a releasing agent. A main component of the binder resin is a polyester resin. The binder resin comprises a crystalline polyester resin, an amorphous polyester resin and a hybrid vinyl resin. The hybrid vinyl resin is composed of a vinyl polymer segment and at least one segment selected from a polyester polymer segment, an urethane polymer segment and an urea polymer segment which is chemically bound to the vinyl polymer segment. A main component of the hybrid vinyl resin is the vinyl polymer segment which comprises a structural unit derived from a monomer having a specific structure. A tetrahydrofuran-soluble fraction of the toner has a main peak of a molecular weight distribution measured by gel permeation chromatography within the range of 11000 to 30000.
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公开(公告)号：US11312865B2
公开(公告)日：2022-04-26
申请号：US17011694
申请日：2020-09-03
Applicant: Konica Minolta, Inc.
Inventor： Takaki Kawamura , Noboru Ueda , Natsuki Ito , Yusuke Takigaura , Ami Motohashi
Abstract: An object of the present invention is to provide an image forming method capable of coating a photocurable varnish without unevenness on a toner image formed using an electrostatic latent image developing toner, and further having good adhesion between a varnish layer and the toner image. The image forming method of the present invention comprises: forming a toner image on a recording medium using an electrostatic latent image developing toner containing a toner particle comprising a binder resin and a release agent; and forming a varnish layer on the toner image by applying and curing a photocurable varnish comprising a photocurable compound. The binder resin comprised in the electrostatic latent image developing toner contains a crystalline polyester resin. The photocurable compound comprised in the photocurable varnish comprises a diol di(meth)acrylate having a straight hydrocarbon chain.
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公开(公告)号：US10379452B2
公开(公告)日：2019-08-13
申请号：US15948020
申请日：2018-04-09
Applicant: Konica Minolta, Inc.
Inventor： Natsuki Ito , Noboru Ueda , Kouji Sugama , Kenshi Miyajima , Yohei Ohno , Hidehito Haruki , Keisuke Asano
Abstract: Provided is a color image forming process using colorant-containing toners of multiple colors containing colorants respectively having different resistances, wherein each of the colorant-containing toners contains an amorphous resin, a crystalline polyester resin, and a mold release agent, at least the crystalline polyester resin contained in the colorant-containing toner other than the colorant-containing toner containing a colorant having the lowest resistance contains a hybrid crystalline polyester resin formed by bonding a crystalline polyester polymerized segment and an amorphous polymerized segment, and the content of the amorphous polymerized segment in the hybrid crystalline polyester resin contained in the colorant-containing toner other than the colorant-containing toner containing a colorant having the lowest resistance is greater than the content of the amorphous polymerized segment in the crystalline polyester resin contained in the colorant-containing toner containing a colorant having the lowest resistance.
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公开(公告)号：US10126668B2
公开(公告)日：2018-11-13
申请号：US15692661
申请日：2017-08-31
Applicant: Konica Minolta, Inc.
Inventor： Kouji Sugama , Shiro Hirano , Noboru Ueda , Kaori Matsushima
IPC: G03G9/087
Abstract: A toner for electrostatic charge image development contains a binder resin and a releasing agent. The binder resin contains an amorphous polyester resin as a main component and a vinyl resin, the vinyl resin contains a constitutional unit derived from a specific monomer. The releasing agent has a melting point of from 65 to 90° C. and contains an ester wax.
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公开(公告)号：US09996017B2
公开(公告)日：2018-06-12
申请号：US15623600
申请日：2017-06-15
Applicant: Konica Minolta, Inc.
Inventor： Aya Shirai , Kouji Sugama , Shiro Hirano , Noboru Ueda
CPC classification number: G03G9/08782 , G03G9/0821 , G03G9/0827 , G03G9/08711 , G03G9/08755 , G03G9/08784 , G03G9/08795 , G03G9/08797
Abstract: An object of the present invention is to provide an electrostatic latent image developing toner containing: a binder resin; and a releasing agent, wherein the binder resin contains a crystalline polyester resin; an endothermic peak top temperature of the electrostatic latent image developing toner is 70° C. or more measured with differential scanning calorimetry (DSC) in a heating-up period of the toner; and a heat value ΔHc(L) is 15% or less with respect to a heat value ΔHc, wherein the heat value ΔHc(L) is a heat value in the range of (an exothermic peak top temperature rc−7° C.) or less; and the heat value ΔHc is a heat value of the total exothermic peak measured with DSC in a heating-down period of the toner.
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Patent Agency Ranking
公开(公告)号：US20180157186A1
公开(公告)日：2018-06-07
申请号：US15820580
申请日：2017-11-22
Applicant: Konica Minolta, Inc.
Inventor： Kenshi MIYAJIMA , Noboru Ueda , Kouji Sugama , Natsuki Ito , Yohei Ohino , Hidehito Haruki , Keisuke Asano
CPC classification number: G03G9/08755 , G03G9/0804 , G03G9/0815 , G03G9/08711 , G03G9/08782 , G03G9/08795 , G03G9/08797 , G03G9/09 , G03G9/0902 , G03G9/0904 , G03G9/091 , G03G9/0918 , G03G13/013
Abstract: An image forming method includes using yellow toner, magenta toner, cyan toner, and black toner in which each of the yellow toner, the magenta toner, the cyan toner, and the black toner includes a crystalline polyester resin having a constitutional unit derived from a linear chain aliphatic diol, an amorphous resin, a colorant, and a releasing agent. A carbon number of a linear chain aliphatic diol component forming the crystalline polyester resin contained in the black toner is 6 or more, and a carbon number of a linear chain aliphatic diol component forming the crystalline polyester resin contained in each of the yellow toner, the magenta toner, and the cyan toner is 3 or more and 5 or less.
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公开(公告)号：US20210095134A1
公开(公告)日：2021-04-01
申请号：US17011694
申请日：2020-09-03
Applicant: Konica Minolta, Inc.
Inventor： Takaki Kawamura , Noboru Ueda , Natsuki Ito , Yusuke Takigaura , Ami Motohashi
Abstract: An object of the present invention is to provide an image forming method capable of coating a photocurable varnish without unevenness on a toner image formed using an electrostatic latent image developing toner, and further having good adhesion between a varnish layer and the toner image. The image forming method of the present invention comprises: forming a toner image on a recording medium using an electrostatic latent image developing toner containing a toner particle comprising a binder resin and a release agent; and forming a varnish layer on the toner image by applying and curing a photocurable varnish comprising a photocurable compound. The binder resin comprised in the electrostatic latent image developing toner contains a crystalline polyester resin. The photocurable compound comprised in the photocurable varnish comprises a diol di(meth)acrylate having a straight hydrocarbon chain.
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公开(公告)号：US10901333B2
公开(公告)日：2021-01-26
申请号：US16439107
申请日：2019-06-12
Applicant: Konica Minolta, Inc.
Inventor： Kouji Sugama , Hiroshi Nagasawa , Anju Hori , Noboru Ueda
IPC: G03G9/087
Abstract: Provided is an electrostatic image developing toner comprising a toner base particle containing a binder resin and a releasing agent, wherein the binder resin comprises an amorphous vinyl resin and a crystalline polyester resin; a weight-average molecular weight of the electrostatic image developing toner is in the range of 50000 to 90000, when calculated from a chromatogram which represents a molecular weight distribution and is measured by gel permeation chromatography; a ratio of content of a resin component having a molecular weight of 100000 or more is in the range of 10 to 20% by area, in the chromatogram which represents the molecular weight distribution; the crystalline polyester resin has a melting point in the range of 65 to 85° C.; and, a ratio of content of the crystalline polyester resin in the binder resin is in the range of 5 to 20% by mass.
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公开(公告)号：US20190294064A1
公开(公告)日：2019-09-26
申请号：US16439107
申请日：2019-06-12
Applicant: Konica Minolta, Inc.
Inventor： Kouji Sugama , Hiroshi Nagasawa , Anju Hori , Noboru Ueda
IPC: G03G9/087
Abstract: Provided is an electrostatic image developing toner comprising a toner base particle containing a binder resin and a releasing agent, wherein the binder resin comprises an amorphous vinyl resin and a crystalline polyester resin; a weight-average molecular weight of the electrostatic image developing toner is in the range of 50000 to 90000, when calculated from a chromatogram which represents a molecular weight distribution and is measured by gel permeation chromatography; a ratio of content of a resin component having a molecular weight of 100000 or more is in the range of 10 to 20% by area, in the chromatogram which represents the molecular weight distribution; the crystalline polyester resin has a melting point in the range of 65 to 85° C.; and, a ratio of content of the crystalline polyester resin in the binder resin is in the range of 5 to 20% by mass.
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公开(公告)号：US10203621B2
公开(公告)日：2019-02-12
申请号：US15820580
申请日：2017-11-22
Applicant: Konica Minolta, Inc.
Inventor： Kenshi Miyajima , Noboru Ueda , Kouji Sugama , Natsuki Ito , Yohei Ohno , Hidehito Haruki , Keisuke Asano
Abstract: An image forming method includes using yellow toner, magenta toner, cyan toner, and black toner in which each of the yellow toner, the magenta toner, the cyan toner, and the black toner includes a crystalline polyester resin having a constitutional unit derived from a linear chain aliphatic diol, an amorphous resin, a colorant, and a releasing agent. A carbon number of a linear chain aliphatic diol component forming the crystalline polyester resin contained in the black toner is 6 or more, and a carbon number of a linear chain aliphatic diol component forming the crystalline polyester resin contained in each of the yellow toner, the magenta toner, and the cyan toner is 3 or more and 5 or less.
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