Patent · US Expired

Surface-modified conductive pigment

US6409815B1 · kind B1 · utility

5Cited by

11References

18Claims

0Family size

Assignee

MERCK PATENT GESELLSCHAFT MIT BESHRANK TER HAFTUNG · DE

Inventors

Alfred Hennemann · Brombachtal, DE
Manfred Kieser · Darmstadt, DE

Key dates

Filing date	Apr 5, 1995
Grant date	Jun 25, 2002
Priority date	—
Expiry date	Apr 5, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2991
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Surface-modified conductive pigment obtainable by partial coating of a conductive pigment with an organic modifying agent. The modifying agent is an organometallic compound of the elements silicon, tin, titanium, zirconium or aluminum. The pigment is prepared by dispersing a conductive pigment, subsequently adding the modifying agent, if appropriate as a mixture with a solvent, to the pigment dispersion, and in particular in an amount such that the powder electrical conductance of the partly coated conductive pigment is in the range between 80% of the starting value and 10−7 S, removing the solvent present, if appropriate, with further agitation and heating of the pigment to 100° C. and finally drying the partly coated pigment.

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