JPS5638057A - Electrophotographic liquid developer - Google Patents

Electrophotographic liquid developer

Info

Publication number
JPS5638057A
JPS5638057A JP11355979A JP11355979A JPS5638057A JP S5638057 A JPS5638057 A JP S5638057A JP 11355979 A JP11355979 A JP 11355979A JP 11355979 A JP11355979 A JP 11355979A JP S5638057 A JPS5638057 A JP S5638057A
Authority
JP
Japan
Prior art keywords
alkyl
formula
colorant
polymerizing
aliphatic hydrocarbon
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
JP11355979A
Other languages
Japanese (ja)
Inventor
Giichi Kaneko
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 JP11355979A priority Critical patent/JPS5638057A/en
Publication of JPS5638057A publication Critical patent/JPS5638057A/en
Pending legal-status Critical Current

Links

Landscapes

  • Liquid Developers In Electrophotography (AREA)
  • Graft Or Block Polymers (AREA)

Abstract

PURPOSE: To enhance adsorption tendency to a colorant, dispersion stability, image fixing and transfer performance, by dispersing into an aliphatic hydrocarbon a toner consisting chiefly of a colorant and a resin obtained by polymerizing a specified vinyl monomer in a solution of a specified crosslinked polymer.
CONSTITUTION: A liquid dispersion of a resin obtained by polymerizing formula II in a solution obtained by dissolving in an aliphatic hydrocarbon a crosslinked polymer represented by formula I is mixed with a colorant, such as carbon black, and when needed, with a polarity controller, and diluted with said solvent to prepare a liquid developer. This developer is superior in fat sensitivity and printing resistance, and used for manufacture of an offset printing plate. In figure I, R1, R3, R4, R5 are each H or CH3; R2, R6 are 6W18C alkyl; n, y are each 10W1,000; m:n=1:99W 50:50; x:y=1:99W50:50. In formula II, R7 is H, CH3, 6W18C alkyl; R8 is COOR9, CONHR10, -OCOR9, or formula III; R9 1W4C alkyl; R10 is H or 1W4C alkyl; and R11 is H, Cl, CH3, NO2, or NH2.
COPYRIGHT: (C)1981,JPO&Japio
JP11355979A 1979-09-06 1979-09-06 Electrophotographic liquid developer Pending JPS5638057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11355979A JPS5638057A (en) 1979-09-06 1979-09-06 Electrophotographic liquid developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11355979A JPS5638057A (en) 1979-09-06 1979-09-06 Electrophotographic liquid developer

Publications (1)

Publication Number Publication Date
JPS5638057A true JPS5638057A (en) 1981-04-13

Family

ID=14615345

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11355979A Pending JPS5638057A (en) 1979-09-06 1979-09-06 Electrophotographic liquid developer

Country Status (1)

Country Link
JP (1) JPS5638057A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5983174A (en) * 1982-11-04 1984-05-14 Mitsubishi Paper Mills Ltd Manufacture of wet developer for electrophotography
JPS60179751A (en) * 1984-02-28 1985-09-13 Fuji Photo Film Co Ltd Liquid developer for electrostatic photography
US4855207A (en) * 1987-03-13 1989-08-08 Ricoh Company, Ltd. Developer for electrophotography
JPH02271365A (en) * 1989-04-12 1990-11-06 Fuji Photo Film Co Ltd Liquid developer for electrostatic photography
JPH02301771A (en) * 1989-05-17 1990-12-13 Fuji Photo Film Co Ltd Liquid developer for electrostatic photography
US5173446A (en) * 1988-06-28 1992-12-22 Ricoh Company, Ltd. Semiconductor substrate manufacturing by recrystallization using a cooling medium
US5310446A (en) * 1990-01-10 1994-05-10 Ricoh Company, Ltd. Method for producing semiconductor film
US5459346A (en) * 1988-06-28 1995-10-17 Ricoh Co., Ltd. Semiconductor substrate with electrical contact in groove

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5983174A (en) * 1982-11-04 1984-05-14 Mitsubishi Paper Mills Ltd Manufacture of wet developer for electrophotography
JPH0124302B2 (en) * 1982-11-04 1989-05-11 Mitsubishi Paper Mills Ltd
JPS60179751A (en) * 1984-02-28 1985-09-13 Fuji Photo Film Co Ltd Liquid developer for electrostatic photography
JPH0431109B2 (en) * 1984-02-28 1992-05-25
US4855207A (en) * 1987-03-13 1989-08-08 Ricoh Company, Ltd. Developer for electrophotography
US5173446A (en) * 1988-06-28 1992-12-22 Ricoh Company, Ltd. Semiconductor substrate manufacturing by recrystallization using a cooling medium
US5459346A (en) * 1988-06-28 1995-10-17 Ricoh Co., Ltd. Semiconductor substrate with electrical contact in groove
US5565697A (en) * 1988-06-28 1996-10-15 Ricoh Company, Ltd. Semiconductor structure having island forming grooves
JPH02271365A (en) * 1989-04-12 1990-11-06 Fuji Photo Film Co Ltd Liquid developer for electrostatic photography
JPH02301771A (en) * 1989-05-17 1990-12-13 Fuji Photo Film Co Ltd Liquid developer for electrostatic photography
US5310446A (en) * 1990-01-10 1994-05-10 Ricoh Company, Ltd. Method for producing semiconductor film

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