ELECTROSTATIC LATENT IMAGE DEVELOPER

PURPOSE:To improve performances of development and transfer, by coating an org. acid contg. fluorocarbon on the surface of an electrically conductive magnetic particles smaller in particle diameter than an insulating magnetic toner both used for a developer. CONSTITUTION:An insulating magnetic toner...

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Bibliographic Details
Main Authors KAWABATA TOSHIYASU, UCHIDA MITSURU, TOSAKA HACHIROU, MINAMITANI TOSHIKI
Format Patent
LanguageEnglish
Published 09.03.1983
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:PURPOSE:To improve performances of development and transfer, by coating an org. acid contg. fluorocarbon on the surface of an electrically conductive magnetic particles smaller in particle diameter than an insulating magnetic toner both used for a developer. CONSTITUTION:An insulating magnetic toner is prepared of an insulating resin, a fine magnetic powder, carbon black, etc., and a conductive magnetic toner having a particle diameter as small as 1/5-4/5 that of the insulating toner is prepared of a resin, fine magnetic powder, a conductive agent, such as carbon black. A dry type developer is obtained by mixing the insulating toner and the conductive toner coated on the surface with a compd. having the general formula of Rf-(CH2)n-X or (RfO)m-R-Xl in which n is 0 or 1; m, l are 1-3; Rf is alkyl, alkenyl, or aryl with at least one H substituted by fluorine; R is alkyl; and X is carboxy, sulfo, or hydroxy.
Bibliography:Application Number: JP19810139409