JPS57116348A - Electrophotographic developing toner - Google Patents

Electrophotographic developing toner

Info

Publication number
JPS57116348A
JPS57116348A JP56002633A JP263381A JPS57116348A JP S57116348 A JPS57116348 A JP S57116348A JP 56002633 A JP56002633 A JP 56002633A JP 263381 A JP263381 A JP 263381A JP S57116348 A JPS57116348 A JP S57116348A
Authority
JP
Japan
Prior art keywords
matrix polymer
colorant
powder
substance
magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56002633A
Other languages
Japanese (ja)
Inventor
Yukio Ide
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP56002633A priority Critical patent/JPS57116348A/en
Publication of JPS57116348A publication Critical patent/JPS57116348A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/083—Magnetic toner particles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/087—Binders for toner particles
    • G03G9/08784—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775
    • G03G9/08786—Graft polymers
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/09—Colouring agents for toner particles

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE:To improve peeling or separation of a colorant from magnetic fine powder and deterioration of a toner due to mechanical shock and shearing stress, by surface-treating the colorant or the magnetic powder with a substance same as or similar to a matrix polymer. CONSTITUTION:A colorant and/or magnetic fine powder is surface-treated with a substance same as a matrix polymer or approximate to the matrix polymer by <=3.0, preferably, <=2.0 in the difference of solubility parameter between this substance and the matrix polymer. This surface treatment method is embodied by graft-copolymerizing a monomer with the surfaces of the colorant or the magnetic powder, thus permitting the colorant or the powder to be strongly combined with the matrix polymer and its dispersion to be enhanced extremely favorably. For example, when polystyrene is used for the matrix polymer of the toner, styrene is graft-copolymerized with the surface of carbon black.
JP56002633A 1981-01-13 1981-01-13 Electrophotographic developing toner Pending JPS57116348A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56002633A JPS57116348A (en) 1981-01-13 1981-01-13 Electrophotographic developing toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56002633A JPS57116348A (en) 1981-01-13 1981-01-13 Electrophotographic developing toner

Publications (1)

Publication Number Publication Date
JPS57116348A true JPS57116348A (en) 1982-07-20

Family

ID=11534787

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56002633A Pending JPS57116348A (en) 1981-01-13 1981-01-13 Electrophotographic developing toner

Country Status (1)

Country Link
JP (1) JPS57116348A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62280755A (en) * 1986-05-30 1987-12-05 Fuji Xerox Co Ltd Color toner
WO2008153972A2 (en) * 2007-06-08 2008-12-18 Cabot Corporation Carbon blacks, toners, and composites and methods of making same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62280755A (en) * 1986-05-30 1987-12-05 Fuji Xerox Co Ltd Color toner
WO2008153972A2 (en) * 2007-06-08 2008-12-18 Cabot Corporation Carbon blacks, toners, and composites and methods of making same
WO2008153972A3 (en) * 2007-06-08 2009-02-05 Cabot Corp Carbon blacks, toners, and composites and methods of making same
KR101428836B1 (en) * 2007-06-08 2014-08-11 캐보트 코포레이션 Carbon blacks, toners, and composites and methods of making same
JP2014222344A (en) * 2007-06-08 2014-11-27 キャボット コーポレイションＣａｂｏｔ Ｃｏｒｐｏｒａｔｉｏｎ Carbon black, toner, and compound material, and manufacturing method of the same

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