公开(公告)号：US20180196366A1

公开(公告)日：2018-07-12

申请号：US15107155

申请日：2014-12-24

Applicant: KAO CORPORATION

Inventor： Shogo WATANABE ,  Kunihiro KANO

IPC: G03G9/08 ,  G03G9/087

CPC classification number: G03G9/0806 ,  G03G9/081 ,  G03G9/0812 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/08755 ,  G03G9/08762 ,  G03G9/08782

Abstract: A toner for electrophotography obtained by a method including: step 1: mixing a polyester and a polylactic acid at a temperature of 140° C. or higher and 200° C. or lower and subjecting the mixture to a transesterification reaction to provide a resin composition; and step 2: mixing the resin composition obtained in step 1 with a polyester which is identical to and/or different from the polyester of step 1, and a method for producing the toner. The toner for electrophotography of the present invention is suitably used in developing latent images formed in an electrophotographic method, an electrostatic recording method, an electrostatic printing method, or the like.

公开(公告)号：US20180196365A1

公开(公告)日：2018-07-12

申请号：US15911272

申请日：2018-03-05

Applicant: Mitsubishi Chemical Corporation

Inventor： Tadahiro OZAWA

IPC: G03G9/08 ,  G03G9/087

CPC classification number: G03G9/081 ,  G03G9/0821 ,  G03G9/087 ,  G03G9/08726 ,  G03G9/08728 ,  G03G9/08755 ,  G03G9/08791 ,  G03G9/08797

Abstract: A master batch for toners according to the present invention contains an acrylic polymer (A) and a polyester resin (B1) at a specific mass ratio. A toner according to the present invention contains the master batch for toners and a polyester resin (B2), and has a content of the acrylic polymer (A) of 5% by mass or less. A method for producing a master batch for toners according to the present invention comprises a step wherein an acrylic polymer (A) and a polyester resin (B1) are mixed at a specific mass ratio. A method for producing a toner according to the present invention comprises a step wherein the master batch for toners and a polyester resin (B2) are mixed so that the content of the acrylic polymer (A) is at a specific amount.

公开(公告)号：US10012918B2

公开(公告)日：2018-07-03

申请号：US15431821

申请日：2017-02-14

Applicant: CANON KABUSHIKI KAISHA

Inventor： Koh Ishigami ,  Takeshi Ohtsu ,  Kentaro Kamae ,  Ryuichiro Matsuo ,  Yosuke Iwasaki ,  Wakiko Katsumata ,  Kenta Mitsuiki ,  Masaharu Miura ,  Yuichi Mizo

IPC: G03G9/097 ,  G03G9/08

CPC classification number: G03G9/0806 ,  G03G9/08 ,  G03G9/0802 ,  G03G9/081 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/08795 ,  G03G9/08797

Abstract: A toner having a toner particle that is produced through a step of melt-kneading a resin composition containing a binder resin, a colorant, a hydrocarbon wax, and a wax dispersing agent, cooling the obtained kneaded material, pulverizing the obtained cooled material, and heat treating the resulting resin particles, wherein the wax dispersing agent is a polymer provided by graft polymerizing a styrene-acrylic polymer onto a polypropylene, the styrene-acrylic polymer is a polymer having a monomer unit derived from a cycloalkyl (meth)acrylate, and specific relationships are satisfied where Mp(p) is the melting point (° C.) of the polypropylene and Mp(w) is the melting point (° C.) of the hydrocarbon wax.

公开(公告)号：US09989869B2

公开(公告)日：2018-06-05

申请号：US15541053

申请日：2016-01-05

Applicant: Daisuke Inoue ,  Naohiro Watanabe ,  Ryota Inoue ,  Masana Shiba ,  Junichi Awamura ,  Shingo Sakashita ,  Tomoki Murayama ,  Yoshitsugu Kimura ,  Rintaro Takahashi ,  Akio Takei

Inventor： Daisuke Inoue ,  Naohiro Watanabe ,  Ryota Inoue ,  Masana Shiba ,  Junichi Awamura ,  Shingo Sakashita ,  Tomoki Murayama ,  Yoshitsugu Kimura ,  Rintaro Takahashi ,  Akio Takei

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

CPC classification number: G03G9/0821 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/08793 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/09392

Abstract: A toner comprising a binder resin and a release agent, wherein the toner has a difference of 30 or less between a maximum value and a minimum value among peak intensities in a range of Molecular weight M±300 where Molecular weight M is a molecular weight selected from a range of from 300 through 5,000 in a molecular weight distribution of tetrahydrofuran (THF)-soluble components in the toner as measured by gel permeation chromatography (GPC), and wherein the peak intensities are defined as relative values assuming a maximum peak value in molecular weights of 20,000 or less is 100, in a molecular weight distribution curve taking an intensity as a vertical axis and a molecular weight as a horizontal axis as measured by GPC.

公开(公告)号：US09983491B2

公开(公告)日：2018-05-29

申请号：US15439435

申请日：2017-02-22

Applicant: Konica Minolta, Inc.

Inventor： Junya Onishi ,  Shiro Hirano ,  Noboru Ueda ,  Kouji Sugama ,  Aya Shirai

IPC: G03G9/08

CPC classification number: G03G9/0804 ,  G03G9/0815 ,  G03G9/0825 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/08797

Abstract: A process for producing a toner of the present invention includes: a first step of heating a dispersion containing an aqueous medium and a binder resin containing a crystalline resin to a temperature higher than or equal to a melting point of the crystalline resin; and a second step of maintaining the dispersion at temperature T (° C.) for 30 minutes or longer in a state where a pH of the dispersion is maintained at 5.5 or higher and 9.0 or lower, in which the temperature T satisfies the following expression, Rc−25≤T≤Rc−5, where the Rc represents a recrystallization temperature (° C.) of the crystalline resin.

公开(公告)号：US09982088B2

公开(公告)日：2018-05-29

申请号：US15356307

申请日：2016-11-18

Applicant: XEROX CORPORATION ,  NATIONAL RESEARCH COUNCIL OF CANADA

Inventor： Karen A. Moffat ,  Dragan Nikolic ,  Valerie M. Farrugia ,  Jordan H. Wosnick ,  Andriy Kovalenko ,  Alexander Kobryn ,  Sergey Gusarov

IPC: C08G63/16 ,  C08G63/183 ,  C08G63/91 ,  G03G9/08 ,  G03G9/087 ,  C08G63/688 ,  G03G9/093

CPC classification number: C08G63/183 ,  C08G63/16 ,  C08G63/688 ,  C08G63/916 ,  G03G9/0804 ,  G03G9/0819 ,  G03G9/0825 ,  G03G9/08755 ,  G03G9/08797 ,  G03G9/09321 ,  G03G9/09371

Abstract: The present disclosure describes a polyester that contains plural pendant adjacent carboxylic acid or acid salt side groups for use in making a toner for use in imaging devices.

公开(公告)号：US09964882B2

公开(公告)日：2018-05-08

申请号：US15402746

申请日：2017-01-10

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Takashi Urabe ,  Taishi Takano ,  Satoshi Araki ,  Junichi Ishikawa ,  Maiko Yoshida

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

CPC classification number: G03G9/08797 ,  G03G9/0804 ,  G03G9/0806 ,  G03G9/081 ,  G03G9/0819 ,  G03G9/08755 ,  G03G9/08793 ,  G03G9/0926 ,  G03G15/0865

Abstract: A toner includes a crystalline polyester resin in an amount equal to or greater than 25% by mass. The toner satisfies the following formula when the toner is tested using a capillary rheometry measurement during which a pellet of the toner is pressed by a member while being heated: 0.3≤(first temperature−second temperature)/(second temperature−third temperature)≤1, where the first temperature is a temperature at which the member falls 4 mm, the second temperature is a temperature at which the member falls 2 mm, and the third temperature is a temperature at which the member starts to fall.

公开(公告)号：US09964879B2

公开(公告)日：2018-05-08

申请号：US15457054

申请日：2017-03-13

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yuhei Terui ,  Yu Yoshida ,  Haruko Kubo ,  Hitoshi Itabashi

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

CPC classification number: G03G9/08711 ,  G03G9/0804 ,  G03G9/08706 ,  G03G9/08722 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/0904 ,  G03G9/0918

Abstract: Provided is a toner comprising a toner particle containing a binder resin, a resin A, and a pigment, wherein the resin A has a pKa of at least 6.0 and not more than 9.0, and also has a hydrophobic parameter HPA of at least 0.65 and not more than 0.95.

公开(公告)号：US09964874B2

公开(公告)日：2018-05-08

申请号：US15259293

申请日：2016-09-08

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yoshitaka Suzumura ,  Yusuke Hasegawa ,  Tomohisa Sano ,  Atsuhiko Ohmori ,  Kozue Uratani ,  Yuujirou Nagashima

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

CPC classification number: G03G9/0821 ,  G03G9/0825 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/0926

Abstract: Provided is a toner including a binder resin, a colorant, a crystalline polyester, and a release agent, wherein a cross-sectional image of the toner is observed using a scanning transmission electron microscope, domains of the crystalline polyester are present in the cross-sectional image of the toner, the domains have a number-average major diameter of at least 50 nm and not more than 300 nm, the number of the domains is at least 8 and not more than 500, and the domains are present at least 60 number % and not more than 100 number % from an outline of the cross-sectional image to 25% of the distance between the outline and the centroid of the cross-sectional image.

公开(公告)号：US09964873B2

公开(公告)日：2018-05-08

申请号：US15167182

申请日：2016-05-27

Applicant: Hiroshi Yamashita ,  Minoru Masuda ,  Hiroshi Yamada ,  Shizuka Hashida ,  Masanori Rimoto

Inventor： Hiroshi Yamashita ,  Minoru Masuda ,  Hiroshi Yamada ,  Shizuka Hashida ,  Masanori Rimoto

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

CPC classification number: G03G9/0821 ,  G03G9/08755 ,  G03G15/08

Abstract: A toner fixable on an image bearer with heat. The toner has a first storage modulus of from 1×103 to 1×106 Pa, measured at 100° C. when being heated, and a second storage modulus of from 1×103 to 1×106 Pa, measured at 100° C. when being cooled, the first storage modulus and second storage modulus being measured by a rheometer, and the second storage modulus at 100° C. when being cooled is higher than the first storage modulus at 100° C. when being heated.