Use of colorless highly fluorine-substituted phosphonium compounds as charge control agents for electrophotographic recording processes

US5147748A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Jorg Gitzel · Hattersheim, DE
• Hans-Tobias Macholdt · Darmstadt, DE
• Wolfgang Knaup · Altötting, DE

Key dates

• Filing date: Apr 12, 1990
• Grant date: Sep 15, 1992
• Expiry date: Apr 12, 2010

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G9/09741
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Use of colorless highly fluorine-substituted phosphonium compounds as charge control agents for electrophotographic recording processes Use of highly fluorine-substituted phosphonium compounds of the formula (I) ##STR1## in which R.sub.1 to R.sub.4 are hydrogen atoms or organic radicals, at least one of the radicals R.sub.1 to R.sub.4 being a fluorine-substituted, unsaturated and/or saturated alkyl radical having 1 to 30 carbon atoms and 3 to 50 fluorine atoms, which can contain further substituents, or a fluorine-substituted aryl radical or an aralkyl radical which is fluorine-substituted on the aromatic ring, it being possible for the aryl or aralkyl radical to be additionally substituted on the aromatic ring, and in the case of an aralkyl radical the alkyl bridge between the phosphorus atom and the aromatic ring contains 1 to 30 carbon atoms, and not more than three of the radicals R.sub.1 and R.sub.4, independently of one another, are hydrogen atoms, unsaturated or saturated, substituted or unsubstituted alkyl radicals having 1 to 30 carbon atoms, aryl or aralkyl radicals which can be substituted on the aromatic ring, and X.sup.- is an anion, it being possible for the radicals …