Loading patent…
AssigneeClariant Produkte (Deutschland) GmbH
InventorsEduard Michel, Ruediger Baur, Hans-Tobias Macholdt
Estimating the term…
Layered double hydroxide salts as charge control agents in electrophotographic toners and developers, in powder coating materials, electret materials and in electrostatic separation processes of chargeable materials, such as polymers, wherein the double hydroxide salt contains monovalent and/or divalent, and also trivalent, metal cations, and also contains one or more organic anions A of the formula (I) X—R—Y (1) wherein X is hydroxyl, carboxyl, sulfato or sulfo; Y is carboxyl, sulfato or sulfo, and R is an aliphatic, cycloaliphatic, heterocycloaliphatic, olefinic, cycloolefinic. heterocycloolefinic, aromatic, heteroaromatic, araliphatic or heteroaraliphatic radical having a total of at least 8 carbon atoms which can be substituted by one or several substituents from the group hydroxyl, amino, halogen, C1-C22-alkyl, C1-C22-alkoxy, —C1-C22-alkylene-(CO)—O—(CH2CH2O)0-50-alkyl,—C1-C22-alkylene-(CO)—O—(CH2H2O)0-50-haloalkyl, carboxy, sulfo, nitro or cyano.
A process for controlling the charge of an electrophotographic toner, electrophotographic developer, powder coating material, electret material or a chargeable material in an electrostatic separation process comprising the step of adding at least one charge control agent to the electrophotographic toner, electrophotographic developer, powder coating material electric material or chargeable material, wherein the at least one charge control agent is a layered double hydroxide salt comprising
An electrophotographic toner, powder or powdercoating material, comprising from 30% to 99.99% by weight of a binder, from 0.01% to 50% by weight of at least one layered double hydroxide salt comprising
Dependencies are inferred from the claim text.