Patent · US Expired

Use of salt-like structured silicas as charge control agents

US7309558B1 · kind B1 · utility

22Cited by

23References

6Claims

0Family size

Assignee

Clariant Produkte (Deutschland) GmbH · DE

Inventors

Eduard Michel · Frankfurt, DE
Rudiger Baur · Eppstein, DE
Hans-Tobias Macholdt · Darmstadt, DE

Key dates

Filing date	Nov 27, 2000
Grant date	Dec 18, 2007
Priority date	—
Expiry date	Nov 27, 2020

Classification

Technology area (CPC G)Physics
CPC primaryG03G9/09741
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The present invention relates to the use of salt-like structured silicates, in which the cation is NH4+, H3O+, an alkali metal, alkaline earth metal, earth metal or transition metal ion or a low molecular weight organic cation or a combination thereof and the anion is an island, cyclic, group, chain, ribbon, laminar or matrix silicate or a combination thereof as charge control agents in electrophotographic toners and developers, in powder coatings, electret materials and in electrostatic separation processes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.