Patent ID: 7276615

Claim:
A process for preparing a metal oxide having groups of the formula I —O 1+n —SiR 1 2−n —CH 2 —Y (I) comprising reacting solid having OH groups on a surface thereof with at least one silane of the formula II RO 1+n —SiR 1 2−n —CH 2 —Y (II) where R is a C—O bonded C 1 -C 15 hydrocarbon radical, R 1 is a hydrogen atom or an Si—C bonded C 1 -C 20 hydrocarbon radical unsubstituted or substituted by —CN, —NCO, —NR x 2 , —COOH, —COOR x , -halo, -acryloyl, -epoxy, —SH, —OH or —CONR x 2 , or a C 1 -C 15 hydrocarbon radical in which one or more nonadjacent methylene units are replaced by a group —O—, —CO—, —COO—, —OCO—, or —OCOO—, —S— or —NR x — and/or in which one or more nonadjacent methine units are optionally replaced by a group —N═, —N═— or —P═, each R 1 being identical or different, Y is a functional group —NR x 2 , —OC(O)C(R)═CH 2 , -halo, —NCO, —NH—C(O)—OR, glycidoxy, —SH, or (R 1 O) 2 (O)P—, wherein R is H or a C 1-15 hydrocarbon radical, R x is a hydrogen atom, a C 1 -C 15 hydrocarbon radical or an aryl radical, each R x being identical or different, and n is 0, 1 or 2, wherein the silane (II) is sprayed onto the metal oxide in the form of an atomized liquid.