Quinacridones having selectively adjusted triboelectric effects

US5137576A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hans-Tobias Macholdt · Darmstadt, DE
• Adolf Kroh · Bad Camberg, DE
• Alexander Sieber · Frankfurt am Main, DE
• Erwin Dietz · Kelkheim, DE

Key dates

• Filing date: Sep 28, 1989
• Grant date: Aug 11, 1992
• Expiry date: Sep 28, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B67/006
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Quinacridones having selectively adjusted triboelectric effects, which quinacridones contain about 0.05% to 100 percent by weight of triboelectrically active compounds of the general formula I EQU Q--A--Y].sub.n (I), in which Q is a quinacridone radical which is unsubstituted or substituted by halogen atoms, alkyl, alkoxy H.sub.2 N--CO--, alkyl--NH--CO-- or (alkyl).sub.2 N--CO groups, A is a direct bond or --O--, --S--, --NR.sup.1 --, --CO--, --SO.sub.2 --, --CR.sup.2 R.sup.3 -- or arylene and Y is an --NR.sup.4 R.sup.5 group or a five-, six- or seven-membered heterocycle which contains one to three heteroatoms from the series comprising nitrogen and/or oxygen and/or sulfur and which can be substituted by alkyl, alkoxy, hydroxyphenyl, halogen, --CN, --COOH, --CO-- NRR', --SO.sub.2 --NRR', hydroxyalkyl or alkylaminoalkyl, in which R and R' together with the nitrogen atom can be a heterocycle, R and R' are hydrogen atoms or alkyl and R.sup.1 to R.sup.5, independently of one another, are each hydrogen and/or alkyl or alkenyl of 1 to 22 carbon atoms and n is a number from 1 to 4, and their use for the preparation of toners or developers which are used for electrophotographic copying or…