JPS5635143A - Electrophotographic toner for reversal developing system - Google Patents

Electrophotographic toner for reversal developing system

Info

Publication number
JPS5635143A
JPS5635143A JP11123679A JP11123679A JPS5635143A JP S5635143 A JPS5635143 A JP S5635143A JP 11123679 A JP11123679 A JP 11123679A JP 11123679 A JP11123679 A JP 11123679A JP S5635143 A JPS5635143 A JP S5635143A
Authority
JP
Japan
Prior art keywords
suspension
toner
styrene
per
aqueous
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
JP11123679A
Other languages
Japanese (ja)
Other versions
JPS5926021B2 (en
Inventor
Hajime Yamamoto
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 JP54111236A priority Critical patent/JPS5926021B2/en
Publication of JPS5635143A publication Critical patent/JPS5635143A/en
Publication of JPS5926021B2 publication Critical patent/JPS5926021B2/en
Expired legal-status Critical Current

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  • Developing Agents For Electrophotography (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE: To obtain a toner having superior characteristics, by adding a fatty acid- modified nigrosine to a copolymer obtained by aqueous-suspension polymerizing butyl methacrylate and styrene in presence of specified inorganic and organic dispersion stahilizers and a neutral water-soluble inorganic salt.
CONSTITUTION: One pt.wt. butyl methacrylate and 1W4pts.wt. styrene are aqueous-suspension polymerized in presence of basic tricalcium phosphate powder bt 0.1W0.5pt.wt. per 100pts.wt monomer mixture and sodium dodecylbenzenesulfonate by 0.01W0.035pt.wt. per said 1pt.wt. calcium salt for stabilizing the suspension, and a water-soluble neutral salt, such as NaCl by 0.02W0.1pt.wt. per 100pts.wt. monomer mixture for preventing deterioration of transparency and electric characteristics of the polymer particles. Five pts. wt. fatty acid-modified nigrosine dye is added to 85pts.wt. copolymer particles thus obtained, together with carbon black etc., mixed by fusing, and after cooling, classified to obtain a 5W30μ toner.
COPYRIGHT: (C)1981,JPO&Japio
JP54111236A 1979-08-30 1979-08-30 Reversal development type electrophotographic toner Expired JPS5926021B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54111236A JPS5926021B2 (en) 1979-08-30 1979-08-30 Reversal development type electrophotographic toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54111236A JPS5926021B2 (en) 1979-08-30 1979-08-30 Reversal development type electrophotographic toner

Publications (2)

Publication Number Publication Date
JPS5635143A true JPS5635143A (en) 1981-04-07
JPS5926021B2 JPS5926021B2 (en) 1984-06-23

Family

ID=14556013

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54111236A Expired JPS5926021B2 (en) 1979-08-30 1979-08-30 Reversal development type electrophotographic toner

Country Status (1)

Country Link
JP (1) JPS5926021B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5362865A (en) * 1977-06-10 1978-06-05 Sugyo Kk Production of food having mooth feel simillar to unbound crab meat by utilizing boiled fish paste
JPS56130762A (en) * 1980-03-17 1981-10-13 Konishiroku Photo Ind Co Ltd Manufacture of toner for electrostatic charge development
JPS60254051A (en) * 1984-05-30 1985-12-14 Hitachi Chem Co Ltd Manufacture of electrophotographic toner
JPH10324807A (en) * 1996-04-23 1998-12-08 Orient Chem Ind Ltd Colored thermoplastic resin composition

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5362865A (en) * 1977-06-10 1978-06-05 Sugyo Kk Production of food having mooth feel simillar to unbound crab meat by utilizing boiled fish paste
JPS5635143B2 (en) * 1977-06-10 1981-08-14
JPS56130762A (en) * 1980-03-17 1981-10-13 Konishiroku Photo Ind Co Ltd Manufacture of toner for electrostatic charge development
JPS6345101B2 (en) * 1980-03-17 1988-09-08 Konika Kk
JPS60254051A (en) * 1984-05-30 1985-12-14 Hitachi Chem Co Ltd Manufacture of electrophotographic toner
JPH10324807A (en) * 1996-04-23 1998-12-08 Orient Chem Ind Ltd Colored thermoplastic resin composition

Also Published As

Publication number Publication date
JPS5926021B2 (en) 1984-06-23

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