JPS5581352A - Dry type two-component developer for reversal development - Google Patents

Dry type two-component developer for reversal development

Info

Publication number
JPS5581352A
JPS5581352A JP15162478A JP15162478A JPS5581352A JP S5581352 A JPS5581352 A JP S5581352A JP 15162478 A JP15162478 A JP 15162478A JP 15162478 A JP15162478 A JP 15162478A JP S5581352 A JPS5581352 A JP S5581352A
Authority
JP
Japan
Prior art keywords
copolymer
development performance
specified
alkyl
iron oxide
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.)
Granted
Application number
JP15162478A
Other languages
Japanese (ja)
Other versions
JPS5611143B2 (en
Inventor
Isamu Moribe
Osamu Higashida
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.)
Showa Denko Materials Co Ltd
Original Assignee
Hitachi Chemical 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 Hitachi Chemical Co Ltd filed Critical Hitachi Chemical Co Ltd
Priority to JP15162478A priority Critical patent/JPS5581352A/en
Publication of JPS5581352A publication Critical patent/JPS5581352A/en
Publication of JPS5611143B2 publication Critical patent/JPS5611143B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE: To improve the reversal development performance, high speed development performance and continuous development performance, and prolong the service life, by combining a toner containing a copolymer having resin properties of specified range and a specified modified Nigrosine dye, with an iron oxide carrier of specified properties.
CONSTITUTION: The composition is shown in formulas I and II (R1 is alkyl of C2W12; R2 is H, CH3; R3 is alkyl of H, C1W4). A copolymer consists of methacrylic base monomer 20W55wt%, styrene base monomer 35W80wt%, and methyl methacrylate up to 10wt%. This copolymer of which softening point is 130W170°C, glass transition temperature 70W90°C and reducing viscosity 0.2W0.7dl/g, and a toner containing modified Nigrosine dye having fatty acid or carboxylic radical as essential ingredient, and an iron oxide powder carrier of almost true spherical form having volume resistivity of 109W12 Ω.cm, apparent specific gravity of 4W5g/cm3 and content of grain size of 50W200μ of 90wt% or more are combined. Thus, a developer suited for use in computer output device in particular is obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP15162478A 1978-12-07 1978-12-07 Dry type two-component developer for reversal development Granted JPS5581352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15162478A JPS5581352A (en) 1978-12-07 1978-12-07 Dry type two-component developer for reversal development

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15162478A JPS5581352A (en) 1978-12-07 1978-12-07 Dry type two-component developer for reversal development

Publications (2)

Publication Number Publication Date
JPS5581352A true JPS5581352A (en) 1980-06-19
JPS5611143B2 JPS5611143B2 (en) 1981-03-12

Family

ID=15522604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15162478A Granted JPS5581352A (en) 1978-12-07 1978-12-07 Dry type two-component developer for reversal development

Country Status (1)

Country Link
JP (1) JPS5581352A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57114148A (en) * 1980-12-30 1982-07-15 Konishiroku Photo Ind Co Ltd Electrostatic latent image developing toner
JPS58106552A (en) * 1981-12-21 1983-06-24 Mita Ind Co Ltd Heat fixable dry type developing toner
JPS59200258A (en) * 1983-04-13 1984-11-13 アグフア・ゲヴエルト・ナ−ムロゼ・ベンノ−ト　チヤツプ Toner composition used for development of static charge pattern
JPS59214860A (en) * 1983-05-23 1984-12-04 Toshiba Corp Toner for developing electrostatically charge image
JPS61284774A (en) * 1985-06-10 1986-12-15 関東電化工業株式会社 Carrier for xerographic developer and manufacture thereof
JPH0280411A (en) * 1988-09-16 1990-03-20 Mitsubishi Rayon Co Ltd Overcoat resin for transfer paper
JPH04149211A (en) * 1990-10-12 1992-05-22 Asahi Chem Ind Co Ltd Novel styrenic resin

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4825669A (en) * 1971-08-05 1973-04-03
JPS4873358A (en) * 1971-12-27 1973-10-03

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4825669A (en) * 1971-08-05 1973-04-03
JPS4873358A (en) * 1971-12-27 1973-10-03

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57114148A (en) * 1980-12-30 1982-07-15 Konishiroku Photo Ind Co Ltd Electrostatic latent image developing toner
JPS5926943B2 (en) * 1980-12-30 1984-07-02 コニカ株式会社 Toner for developing electrostatic images
JPS58106552A (en) * 1981-12-21 1983-06-24 Mita Ind Co Ltd Heat fixable dry type developing toner
JPH0350266B2 (en) * 1981-12-21 1991-08-01 Mita Industrial Co Ltd
JPS59200258A (en) * 1983-04-13 1984-11-13 アグフア・ゲヴエルト・ナ−ムロゼ・ベンノ−ト　チヤツプ Toner composition used for development of static charge pattern
JPS59214860A (en) * 1983-05-23 1984-12-04 Toshiba Corp Toner for developing electrostatically charge image
JPS61284774A (en) * 1985-06-10 1986-12-15 関東電化工業株式会社 Carrier for xerographic developer and manufacture thereof
JPH0238948B2 (en) * 1985-06-10 1990-09-03 Kanto Denka Kogyo Kk
JPH0280411A (en) * 1988-09-16 1990-03-20 Mitsubishi Rayon Co Ltd Overcoat resin for transfer paper
JPH04149211A (en) * 1990-10-12 1992-05-22 Asahi Chem Ind Co Ltd Novel styrenic resin

Also Published As

Publication number Publication date
JPS5611143B2 (en) 1981-03-12

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