Patent ID: 6403689
Filing Date: 2002-06-11
Classification: C08K,C09D,Y10T

Abstract:
A dispersion in a liquid phase of particles of photocatalytic titanium dioxide, said liquid phase comprising at least one polyorganosiloxane of mean formula (I):M60D&bgr;Q&dgr;(O1/2Ri)&egr;, wherein:M=Rii3SiO1/2 D=Rii2SiO2/2 Q=SiO4/2 wherein Rii, which are identical or different, represent either a linear or branched alkyl radical having from 1 to 8 carbon atoms or an optionally substituted aryl group having from 6 to 12 carbon atoms or an aralkyl, alkaryl, aryloxyalkyl or alkoxyaryl group in which the aryl group comprises from 6 to 12 carbon atoms, optionally said atoms being substituted by at least one linear or branched alkyl or alkoxy group having from 1 to 4 carbon atoms, and in which the alkyl or alkoxy group has from 1 to 4 carbon atoms and is linear or branched; &agr;, &bgr; and &dgr; respectively represent the molar fractions of the silicon atoms of the M, D and Q units, with &agr;+&bgr;+&dgr;=1, and: &agr;&lE;0.10 &bgr;&lE;0.85, and &dgr;&lE;0.10, Ri, which are identical or different, represent an alkyl group having from 1 to 4 carbon atoms, and &egr; represents the mean number of O1/2Ri units per silicon atom.