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GB993150A - Improvements in or relating to electrophotography - Google Patents

Improvements in or relating to electrophotography

Info

Publication number
GB993150A
GB993150A GB5770/62A GB577062A GB993150A GB 993150 A GB993150 A GB 993150A GB 5770/62 A GB5770/62 A GB 5770/62A GB 577062 A GB577062 A GB 577062A GB 993150 A GB993150 A GB 993150A
Authority
GB
United Kingdom
Prior art keywords
aryl
rosin
modified
alkyl compound
carrier
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.)
Expired
Application number
GB5770/62A
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB993150A publication Critical patent/GB993150A/en
Expired 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
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • G03G9/125—Developers with toner particles in liquid developer mixtures characterised by the liquid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/37—Printing employing electrostatic force

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

A composition for developing electrostatic images is made by comminuting finely-divided electrically attractable solid optically dense pigment particles, of size between 0.1 and 20 microns, with a solution in an aromatic solvent of one or more resinous binders which are highly soluble in aromatic solvents but not more than slightly soluble in aliphatic solvents, admixing the pigment-resin mixture with an aryl-alkyl compound comprising a benzene nucleus substituted with at least one aliphatic group, and dispensing the resulting mixture in a liquid carrier having an electrical resistivity greater than 109 ohm-cm. and a dielectric constant between 1 and 6. A list of suitable pigments, including metals and inorganic and organic pigments, is given. Other ingredients specified are: resins-phenol-aldehyde resins which may be oil-modified, rosin- and modified rosin-esters; and maleic-alkyd resins; aryl-alkyl compounds-xylene, mesitylene, and ethyl-, n-propyl-, n-butyl-, isobutyl-, n-pentyl- and n-hexyl-benzenes; and carrier liquids-cyclohexane, carbontetrachloride, trichlorotrifluoroethane, cyclopentane, n-pentane, n-hexane, kerosene, mineral oil and silicone oil. Generally the toner particles are admixed with the aryl-alkyl compound made in the above manner from (1) Jet Nigrosine, a phenol-modified pentaerythritol ester of rosin acid, a styrenated alkyd resin, commercial xylene as solvent, n-propylbenzene as aryl-alkyl compound and cyclohexane as carrier liquid, and (2) Solfast Green, a modified maleic rosin, commercial xylene, isobutyl benzene as aryl-alkyl compound and carbon tetrachloride as carrier liquid. Specification 992,692 is referred to.
GB5770/62A 1961-02-20 1962-02-15 Improvements in or relating to electrophotography Expired GB993150A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US90404A US3135695A (en) 1961-02-20 1961-02-20 Liquid developers for electrostatic photography

Publications (1)

Publication Number Publication Date
GB993150A true GB993150A (en) 1965-05-26

Family

ID=22222632

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5770/62A Expired GB993150A (en) 1961-02-20 1962-02-15 Improvements in or relating to electrophotography

Country Status (4)

Country Link
US (1) US3135695A (en)
BE (1) BE614048A (en)
DE (1) DE1215524B (en)
GB (1) GB993150A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3542681A (en) * 1968-07-10 1970-11-24 Gaf Corp Negative working electrostatic toners

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1250738B (en) * 1961-03-13
US3296140A (en) * 1964-02-13 1967-01-03 Dick Co Ab Liquid developer for electrographic printing
US3507794A (en) * 1964-12-22 1970-04-21 Harris Intertype Corp Electrostatic photography systems
US3549361A (en) * 1966-08-01 1970-12-22 Eastman Kodak Co Electrophotographic compositions and elements
US3878120A (en) * 1966-11-28 1975-04-15 Shinichiro Nagashima Process for preparing liquid developer for electrostatic images
US3640863A (en) * 1968-06-05 1972-02-08 Ricoh Kk A liquid electrostatic having pigment particles coated with a cyclized rubber
US3668127A (en) * 1968-07-01 1972-06-06 Ricoh Kk Liquid developer for electrophotography
US3779924A (en) * 1971-04-01 1973-12-18 Eastman Kodak Co Process for preparing electrophotographic liquid developing compositions
GB1438954A (en) * 1972-07-12 1976-06-09 Waddington Ltd J Cartons and blanks therefor
US3833369A (en) * 1972-12-29 1974-09-03 Polaroid Corp Color diffusion transfer films and processes with polymer encapsulated reflecting agents
DE2333064C2 (en) * 1973-06-29 1983-03-10 Hoechst Ag, 6000 Frankfurt Method of making an electrostatographic suspension developer
US4093534A (en) * 1974-02-12 1978-06-06 Plessey Handel Und Investments Ag Working fluids for electrophoretic image display devices
US4005022A (en) * 1974-02-25 1977-01-25 Pitney-Bowes, Inc. Electrostatic liquid toners
US4202785A (en) * 1978-05-15 1980-05-13 Eastman Kodak Company Polyesterionomers having utility in liquid electrographic developer compositions
US4252921A (en) * 1979-10-03 1981-02-24 Eastman Kodak Company Polyesterionomers having utility in liquid electrographic developer compositions
US4480022A (en) * 1982-09-27 1984-10-30 Eastman Kodak Company Method for forming a self-fixed image on a nonporous surface at ambient temperature

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891911A (en) * 1955-06-06 1959-06-23 Gen Dynamics Corp Developer for electrostatic printing
NL95463C (en) * 1955-12-29
US2877133A (en) * 1956-10-22 1959-03-10 Gen Dynamics Corp Electrostatic photography
US2899335A (en) * 1956-10-31 1959-08-11 Process for developing electrostatic

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3542681A (en) * 1968-07-10 1970-11-24 Gaf Corp Negative working electrostatic toners

Also Published As

Publication number Publication date
BE614048A (en)
US3135695A (en) 1964-06-02
DE1215524B (en) 1966-04-28

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