Surface-modified, pyrogenically produced mixed oxides, method of their production and use
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United States of America Patent
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Feb 8, 2000
Grant Date -
N/A
app pub date -
Jan 11, 1996
filing date -
Jan 12, 1995
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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: (a) organosilanes of the type (RO).sub.3 Si(C.sub.n H.sub.2n+1), (b) R'.sub.x (RO).sub.y Si(C.sub.n H.sub.2n+1), (c) X.sub.3 Si(C.sub.n H.sub.2n+1), (d) X.sub.2 (R')Si(C.sub.n H.sub.2n+1), (e) X(R').sub.2 Si(C.sub.n H.sub.2n+1), (f) (RO).sub.3 Si(CH.sub.2).sub.m --R', (g) (R').sub.x (RO).sub.y Si(CH.sub.2).sub.m --R', (h) X.sub.3 Si(CH.sub.2).sub.m --R', (i) (R)X.sub.2 Si(CH.sub.2).sub.m --R', (j) (R).sub.2 X Si(CH.sub.2).sub.m --R', (k) Silazanes of the type ##STR1## (l) Cyclic polysiloxanes, (m) Polysiloxanes or silicone oils.
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