TONER

PURPOSE:To obtain a toner ensuring superior stability of image quality at the time of forming many copies at a low cost by suspension-polymerizing a polymerizable vinyl monomer with a nonionic dispersant and an azo initiator and using the resulting polymer as a binder. CONSTITUTION:A polymerizable v...

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Bibliographische Detailangaben
Hauptverfasser:	KUBO SHINJI, YOSHIDA KEIJI, FUNATO MAKOTO, TAKAHIRO SHIYUUJI, INAGAKI MOTOJI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY CINEMATOGRAPHY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES ELECTROGRAPHY ELECTROPHOTOGRAPHY FILLING PASTES HOLOGRAPHY INKS MAGNETOGRAPHY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PHOTOGRAPHY PHYSICS POLISHES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a toner ensuring superior stability of image quality at the time of forming many copies at a low cost by suspension-polymerizing a polymerizable vinyl monomer with a nonionic dispersant and an azo initiator and using the resulting polymer as a binder. CONSTITUTION:A polymerizable vinyl monomer is suspension-polymerized with a nonionic dispersant and an azo initiator. PVA having 70-90% degree of saponification and 500-3,000 degree of polymn. is preferably used as the nonionic dispersant because it improves the characteristics of the resulting polymer as a binder for a toner. Azobisisobutyronitrile, 2,2'-azobis-(2,4- dimethylvaleronitrile), dimethyl-2,2'-azobisisobutyronitrile or 2,2'-azobis-(2- methylbutyronitrile) is preferably used as the azo initiator because it retains polymn. activity to the monomer, finishes polymn. in a relatively short time and hardly leaves a by-product produced by decomposition in the resulting polymer.