Use of colorless, intensely fluorinated ammonium and iminium compounds as charge control agents for electrophotographic recording processes

US5069994A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Jorg Gitzel · Hattersheim, DE
• Hans-Tobias Macholdt · Darmstadt, DE
• Alexander Sieber · Frankfurt am Main, DE
• Frank Wehowsky · Niedernhausen, DE
• Gunther Prossel · Altötting, DE

Key dates

• Filing date: Nov 2, 1989
• Grant date: Dec 3, 1991
• Expiry date: Nov 2, 2009

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G9/09766
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The use of intensely fluorinated ammonium compounds of the general formula (I) ##STR1## in which R.sub.1 to R.sub.4 denote hydrogen atoms or organic radicals, at least one of the radicals R.sub.1 to R.sub.4 denoting a straight-chain or branched fluorine-containing alkyl radical or fluorine-containing alkenyl radical which contains 1 to 69 carbon atoms and 3 to 66 fluorine atoms and which may be substituted, and at most three of the radicals R.sub.1 to R.sub.4 are, independently of one another, hydrogen atoms, straight-chain or branched alkyl radicals or alkenyl radicals containing 1 to 30 carbon atoms, aryl radicals or aralkyl radicals, and X.sup.- denotes an organic or inorganic anion, and of intensely fluorinated iminium compounds of the general formula (II) ##STR2## in which R.sub.9 to R.sub.12 denote hydrogen atoms or organic radicals, at least one of the radicals R.sub.9 to R.sub.12 denoting a straight-chain or branched fluorine-containing alkyl radical or fluorine-containing alkenyl radical which contains 1 to 69 carbon atoms and 3 to 66 fluorine atoms and which may be substituted, and at most three of the radicals R.sub.9 to R.sub.12 denote, independently of one another, hyd…