JPS57105751A - Carrier material for electrophotographic developer - Google Patents

Carrier material for electrophotographic developer

Info

Publication number
JPS57105751A
JPS57105751A JP55182104A JP18210480A JPS57105751A JP S57105751 A JPS57105751 A JP S57105751A JP 55182104 A JP55182104 A JP 55182104A JP 18210480 A JP18210480 A JP 18210480A JP S57105751 A JPS57105751 A JP S57105751A
Authority
JP
Japan
Prior art keywords
carrier
ratios
polymers
segment
polymer
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
JP55182104A
Other languages
Japanese (ja)
Inventor
Itsuo Ikeda
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 JP55182104A priority Critical patent/JPS57105751A/en
Publication of JPS57105751A publication Critical patent/JPS57105751A/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
    • G03G9/10—Developers with toner particles characterised by carrier particles
    • G03G9/113—Developers with toner particles characterised by carrier particles having coatings applied thereto
    • G03G9/1132—Macromolecular components of coatings
    • G03G9/1133—Macromolecular components of coatings obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • G03G9/1134—Macromolecular components of coatings obtained by reactions only involving carbon-to-carbon unsaturated bonds containing fluorine atoms

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE:To obtain a carrier which does not require high temp. firing, is non- tacky, has high film strength, and gives stable and good images under wide temp. and humidity conditions by covering the surfaces of carrier nuclear particles with a covering material contg. a specific fluorine-contg. block polymer. CONSTITUTION:The surfaces of carrier nuclear particles are covered with the polymer expressed by the formula[A, B are polymer chain segments, one of which is a polymer chain segment of 30,000-1,200,000mol.wts. selected from polymers of CF2=CH2/CF3CF=CF2/CF2=CF2 of (45-90)/(5-50)/(0-35) copolymer ratios (molar ratios), polymers of CF2=CH2/CF3CH=CF2/CF2=CF2 of (45- 90)/(5-50)/(0-35) copolymer ratios, etc., and the other of which is polymer chain segment of 10,000-400,000mol.wts. consisting of polymers of CF2=CH2/CF2= CF2 of (0-100)/(0-100) copolymer ratios, and are block polymer chains of 10- 95 to 5-90 weight ratios of the former segment to the latter segment, n is the number of bonds of R], whereby the carrier having a long life, electrostatic charging characteristics and permitting high speed copying is obtained.
JP55182104A 1980-12-24 1980-12-24 Carrier material for electrophotographic developer Pending JPS57105751A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55182104A JPS57105751A (en) 1980-12-24 1980-12-24 Carrier material for electrophotographic developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55182104A JPS57105751A (en) 1980-12-24 1980-12-24 Carrier material for electrophotographic developer

Publications (1)

Publication Number Publication Date
JPS57105751A true JPS57105751A (en) 1982-07-01

Family

ID=16112402

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55182104A Pending JPS57105751A (en) 1980-12-24 1980-12-24 Carrier material for electrophotographic developer

Country Status (1)

Country Link
JP (1) JPS57105751A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61120170A (en) * 1984-11-16 1986-06-07 Konishiroku Photo Ind Co Ltd Electrostatic image developing carrier
JPH01276150A (en) * 1988-04-28 1989-11-06 Canon Inc Coated carrier for electrophotography

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61120170A (en) * 1984-11-16 1986-06-07 Konishiroku Photo Ind Co Ltd Electrostatic image developing carrier
JPH0217110B2 (en) * 1984-11-16 1990-04-19 Konika Kk
JPH01276150A (en) * 1988-04-28 1989-11-06 Canon Inc Coated carrier for electrophotography

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