JPS5778550A - Developer - Google Patents

Developer

Info

Publication number
JPS5778550A
JPS5778550A JP55154939A JP15493980A JPS5778550A JP S5778550 A JPS5778550 A JP S5778550A JP 55154939 A JP55154939 A JP 55154939A JP 15493980 A JP15493980 A JP 15493980A JP S5778550 A JPS5778550 A JP S5778550A
Authority
JP
Japan
Prior art keywords
developer
alumina
5pts
silicate powder
grain sizes
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
JP55154939A
Other languages
Japanese (ja)
Inventor
Masanori Takenouchi
Toru Matsumoto
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP55154939A priority Critical patent/JPS5778550A/en
Publication of JPS5778550A publication Critical patent/JPS5778550A/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
    • G03G9/097—Plasticisers; Charge controlling agents
    • G03G9/09708—Inorganic compounds
    • 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
    • G03G9/0906—Organic dyes
    • G03G9/0914—Acridine; Azine; Oxazine; Thiazine-;(Xanthene-) dyes
    • 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
    • G03G9/097—Plasticisers; Charge controlling agents
    • G03G9/09708—Inorganic compounds
    • G03G9/09725—Silicon-oxides; Silicates

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE:To obtain a developer which is stable and uniform in the quantity of frictional electrostatic charging, is free from photographic fogs, and scattering and cohesion of the toner, increases the number of enduring copies and has a high transfer effect at high humidity by permitting fine silicate powder contg. alumina to be contained. CONSTITUTION:The fine silicate powder contg. alumina is contained in the developer. The fine silicate powder contg. alumina which is 0.1-20% contents of alumina, and 0.01-2mum average primary grain sizes is used, and it is preferable to add the same to the developer at 0.01-20wt%. For example, 100pts. polystyrene regin 5pts. carbon black and 5pts. methylene blue chloride are kneaded with hot rolls, after which the mixture is pulverized to 10-20mum average grain sizes. 100pts. ion powder of 50-80mum average grain sizes is added to 5pts. the mixture prepd. by adding 1.0wt% said fine silicate powder contd. alimina to the fine powder obtained in the way and mixing these with a Henschel mixer, whereby the electrophotographic developer is obtained.
JP55154939A 1980-11-04 1980-11-04 Developer Pending JPS5778550A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55154939A JPS5778550A (en) 1980-11-04 1980-11-04 Developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55154939A JPS5778550A (en) 1980-11-04 1980-11-04 Developer

Publications (1)

Publication Number Publication Date
JPS5778550A true JPS5778550A (en) 1982-05-17

Family

ID=15595232

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55154939A Pending JPS5778550A (en) 1980-11-04 1980-11-04 Developer

Country Status (1)

Country Link
JP (1) JPS5778550A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6215558A (en) * 1985-07-15 1987-01-23 Canon Inc Magnetic developer
US4734350A (en) * 1986-12-29 1988-03-29 Xerox Corporation Positively charged developer compositions with modified charge enhancing additives containing amino alcohols
US4902598A (en) * 1988-07-01 1990-02-20 Xerox Corporation Process for the preparation of silica containing charge enhancing additives
US4965158A (en) * 1986-08-01 1990-10-23 Xerox Corporation Toner compositions with modified charge enhancing additives

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6215558A (en) * 1985-07-15 1987-01-23 Canon Inc Magnetic developer
US4965158A (en) * 1986-08-01 1990-10-23 Xerox Corporation Toner compositions with modified charge enhancing additives
US4734350A (en) * 1986-12-29 1988-03-29 Xerox Corporation Positively charged developer compositions with modified charge enhancing additives containing amino alcohols
US4902598A (en) * 1988-07-01 1990-02-20 Xerox Corporation Process for the preparation of silica containing charge enhancing additives

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