GB1281741A - Liquid developer for electrostatography - Google Patents

Liquid developer for electrostatography

Info

Publication number
GB1281741A
GB1281741A GB33225/69A GB3322569A GB1281741A GB 1281741 A GB1281741 A GB 1281741A GB 33225/69 A GB33225/69 A GB 33225/69A GB 3322569 A GB3322569 A GB 3322569A GB 1281741 A GB1281741 A GB 1281741A
Authority
GB
United Kingdom
Prior art keywords
styrene
copolymer
weight
copoly
butylmethacrylate
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
GB33225/69A
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
Publication of GB1281741A publication Critical patent/GB1281741A/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
    • G03G9/13—Developers with toner particles in liquid developer mixtures characterised by polymer components
    • G03G9/131—Developers with toner particles in liquid developer mixtures characterised by polymer components obtained by reactions only involving carbon-to-carbon unsaturated bonds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Liquid Developers In Electrophotography (AREA)

Abstract

1281741 Electrostatographic developers RICOH K K 1 July 1969 [1 July 1968] 33225/69 Heading G2H An electrostatographic liquid developer comprises 1 to 50 parts by weight of a toner dispersed in 1000 parts by weight of a carrier liquid having a volume electrical resistivity of more than 10<SP>9</SP>#cm, said toner comprising pigment particles coated with two or more resinous layers, the innermost layer comprising 0À5-10 parts by weight (per 1 part by weight of pigment particles) of a resin which is insoluble in the carrier liquid and which is selected from a group A consisting of polystyrene, styrene-butylmethacrylate copolymer, styrene-laurylmethacrylate copolymer, styrenehydroxyethylmethacrylate copolymer, styrene-butadiene copolymer, methylmethacrylatebutylmethacrylate copolymer, epoxy resin and phenol resin and the outermost layer comprising 1-20 parts by weight (per 1 part by weight of pigment particles) of a resin which is swollen by the carrier liquid and which is selected from a group B consisting of styrene-laurylmethacrylate copolymer, styrene-butylmethacrylate-acrylic acid copolymer, butylmethacrylate homopolymer, vinyl toluene-vinyl acetate copolymer, phenolmodified alkyd resin, laurylmethacrylatehydroxyethylmethacrylate copolymer, and styrene-butadiene copolymer. The toner particles may additionally have an intermediate layer of a resin selected from those listed above but different from those forming the inner and outer layers. In the Examples the toners comprise (1) Spirit black coated with copoly (styrene/butylmethacrylate) and then polybutylmethacrylate, (2) Aniline black coated with copoly (styrene/laurylmethacrylate), polybutylmethacrylate and then copoly (laurylmethacrylate/hydroxyethylmethacrylate), and (3) carbon black coated with copoly (methyl methacrylate/ butylmethacrylate) and the copoly (styrene /butadiene).
GB33225/69A 1968-07-01 1969-07-01 Liquid developer for electrostatography Expired GB1281741A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4513568 1968-07-01

Publications (1)

Publication Number Publication Date
GB1281741A true GB1281741A (en) 1972-07-12

Family

ID=12710819

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33225/69A Expired GB1281741A (en) 1968-07-01 1969-07-01 Liquid developer for electrostatography

Country Status (4)

Country Link
US (1) US3668127A (en)
BE (1) BE735455A (en)
FR (1) FR2012108A1 (en)
GB (1) GB1281741A (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874896A (en) * 1968-07-11 1975-04-01 Ricoh Kk Reversible developer for electrostatic latent imaging method
US3939085A (en) * 1971-06-21 1976-02-17 Savin Business Machines Corporation Process for forming a liquid developer organisol
US4032463A (en) * 1972-02-04 1977-06-28 Kabushiki Kaisha Ricoh Liquid developer for use in electrostatic photography and preparation of same
JPS515945B2 (en) * 1972-06-16 1976-02-24
JPS5137789B2 (en) * 1972-08-17 1976-10-18
US3926825A (en) * 1973-05-29 1975-12-16 Xerox Corp Liquid developer composition and process for preparing same
US3976808A (en) * 1973-05-29 1976-08-24 Xerox Corporation Imaging systems
US4157974A (en) * 1973-06-29 1979-06-12 Hoechst Aktiengesellschaft Electrophotographic liquid developer and process for the manufacture thereof
US3860552A (en) * 1973-09-12 1975-01-14 Pitney Bowes Inc Copolymer compositions and method of preparation
JPS5413981B2 (en) * 1973-11-05 1979-06-04
US4156034A (en) * 1974-03-20 1979-05-22 Hitachi, Ltd. Liquid developer for electro photography
US4157973A (en) * 1974-05-15 1979-06-12 Pitney-Bowes, Inc. Copolymer compositions and method of preparation
US4052325A (en) * 1974-12-23 1977-10-04 Eastman Kodak Company Liquid electrographic developer composition containing redispersible polyester toner and process
GB1576719A (en) * 1976-07-23 1980-10-15 Agfa Gevaert Electrophoretic developers
DE3232062A1 (en) * 1982-08-28 1984-03-01 Agfa-Gevaert Ag, 5090 Leverkusen ELECTROSTATOGRAPHIC SUSPENSION DEVELOPER AND METHOD FOR THE PRODUCTION THEREOF
US4497917A (en) * 1982-09-29 1985-02-05 Eastman Kodak Company Latex composition comprising core-shell polymer particles
US5192638A (en) * 1984-12-10 1993-03-09 Spectrum Sciences B.V. Toner for use in compositions for developing latent electrostatic images, method of making the same, and liquid composition using the improved toner
US5238762A (en) * 1990-03-26 1993-08-24 Olin Corporation Liquid colored toner compositions and their use in contact and gap electrostatic transfer processes
US5240806A (en) * 1990-03-26 1993-08-31 Olin Corporation Liquid colored toner compositions and their use in contact and gap electrostatic transfer processes
US5330872A (en) * 1990-03-26 1994-07-19 Olin Corporation Liquid colored toner compositions
US5432036A (en) * 1994-04-25 1995-07-11 Lexmark International, Inc. Liquid electrostatic toners with terpolymer resin
US5521046A (en) * 1995-03-13 1996-05-28 Olin Corporation Liquid colored toner compositions with fumed silica
US5652282A (en) * 1995-09-29 1997-07-29 Minnesota Mining And Manufacturing Company Liquid inks using a gel organosol
US6255363B1 (en) 1995-09-29 2001-07-03 3M Innovative Properties Company Liquid inks using a gel organosol
CN108463518A (en) * 2016-03-18 2018-08-28 惠普印迪戈股份公司 Electrostatic ink composition
FR3116501B1 (en) 2020-11-25 2022-10-07 Psa Automobiles Sa Method and device for determining a virtual boundary line between two traffic lanes.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899335A (en) * 1956-10-31 1959-08-11 Process for developing electrostatic
US3140175A (en) * 1957-07-03 1964-07-07 Edward K Kaprelian Color electrophotography
US3080318A (en) * 1958-03-13 1963-03-05 Xerox Corp Three-component xerographic toner
US3080250A (en) * 1958-03-13 1963-03-05 Xerox Corp Self-tackifying xerographic toner
US3080251A (en) * 1958-03-13 1963-03-05 Xerox Corp Method of xerographic development
BE614048A (en) * 1961-02-20
US3438904A (en) * 1966-01-10 1969-04-15 Scm Corp Liquid toner
US3503881A (en) * 1967-06-20 1970-03-31 Ricoh Kk Liquid developer for electrophotography

Also Published As

Publication number Publication date
DE1933362A1 (en) 1970-06-11
BE735455A (en) 1969-12-16
DE1933362B2 (en) 1974-03-14
US3668127A (en) 1972-06-06
FR2012108A1 (en) 1970-03-13

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee