Process for the preparation of organophilic metal oxide...

Details Process for the preparation of organophilic metal oxide... Process for the preparation of organophilic metal oxide...

C - Chemistry, Metallurgy

09

C

C09C 3/12 (2006.01) C08K 3/00 (2006.01) C08K 9/06 (2006.01) C09D 17/00 (2006.01) C09K 15/32 (2006.01) A61K 7/42 (1995.01)

Patent

CA 2152532

Organophilic particles of a metal oxide chosen from alumina Al2O3, silica SiO2, transition metal oxides, especially titanium oxide TiO2, and rare-earth metal oxides, especially cerium oxide CeO2, are prepared by reacting an aqueous-alcoholic suspension (a) of metal oxide particles which have no pores less than 5 nm in diameter at their surface with an anhydrous alcoholic solution (b) comprising at least one alkoxysilane of formula (1) Si (OR)xR'4-x (1) in which R represents an alkyl group containing from 1 to 6 carbon atoms, R' represents a hydrocarbon group chosen from alkyl, cycloalkyl, aryl, alkylaryl, arylalkyl, alkenyl and alkynyl groups containing at least one carbon atom and x is an integer from 1 to 3, the said alcohols, which may be identical or different, containing from 1 to 5 carbon atoms.

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