The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 1996
Filed:
Sep. 08, 1993
Katherina Seitz, Frankfurt am Main, DE;
Hans-Michael Guther, Kelkheim/Taunus, DE;
Friedrich Hessel, Mainz, DE;
Frank Schroder, Hurth, DE;
Christine Kostler, Bad Soden am Taunus, DE;
Andreas Roosen, Hofheim/Taunus, DE;
Christian May, Erftstadt, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
A water sensitive ceramic powder, in particular aluminum nitride, is provided with a hydrophobic coating. The coated powder is dispersed in water with addition of a binder and a nonionic surfactant from the group comprising ethylene oxide adducts with an HLB value of from 10 to 14. Subsequently the aqueous slip is converted into a free flowing granulated powder. The nonionic surfactant, which is added in an amount sufficient to give a monomolecular layer, makes possible a good dispersion of the hydrophobically coated powder in water.