Surface-modified, pyrogenically produced mixed oxides, method of their production and use

US6022404A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Manfred Ettlinger · Karlstein, DE
• Werner Hartmann · Hamburg, DE
• Dieter Kerner · Midland Park, US
• Jurgen Meyer · Aschaffenburg, DE

Key dates

• Filing date: Jan 11, 1996
• Grant date: Feb 8, 2000
• Expiry date: Jan 11, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/80
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Surface-modified, pyrogenically produced mixed oxides which contain two or more components of the series SiO.sub.2, Al.sub.2 O.sub.3, TiO.sub.2, ZrO.sub.2, Fe.sub.2 O.sub.3, Nb.sub.2 O.sub.5, V.sub.2 O.sub.5, WO.sub.3, SnO.sub.2, GeO.sub.2 and have been surface-modified with one to several compounds of the following groups: PA0 (a) organosilanes of the type (RO).sub.3 Si(C.sub.n H.sub.2n+1), PA0 (b) R'.sub.x (RO).sub.y Si(C.sub.n H.sub.2n+1), PA0 (c) X.sub.3 Si(C.sub.n H.sub.2n+1), PA0 (d) X.sub.2 (R')Si(C.sub.n H.sub.2n+1), PA0 (e) X(R').sub.2 Si(C.sub.n H.sub.2n+1), PA0 (f) (RO).sub.3 Si(CH.sub.2).sub.m --R', PA0 (g) (R").sub.x (RO).sub.y Si(CH.sub.2).sub.m --R', PA0 (h) X.sub.3 Si(CH.sub.2).sub.m --R', PA0 (i) (R)X.sub.2 Si(CH.sub.2).sub.m --R', PA0 (j) (R).sub.2 X Si(CH.sub.2).sub.m --R', PA0 (k) Silazanes of the type ##STR1## (l) Cyclic polysiloxanes, (m) Polysiloxanes or silicone oils.