| abstract |
One aspect of the invention is to provide a composition comprising antitanium dioxide particle having on the surface of said particle a substantiallynencapsulating layer comprising a pyrogenically-deposited metal oxide; saidnsubstantially encapsulating layer having on its surface at least one organicnsurface treatment material selected from an organo-silane, an organo-siloxane,na fluoro-silane, an organo-phosphonate, an organo-acid phosphate,nan organo-pyrophosphate, an organo-polyphosphate, an organo-metaphosphate,nan organo-phosphinate, an organo-sulfonic compound, anhydrocarbon-based carboxylic acid, an associated ester of a hydrocarbon-basedncarboxylic acid, a derivative of a hydrocarbon-based carboxylic acid, anhydrocarbon-based amide, a low molecular weight hydrocarbon wax, a lownmolecular weight polyolefin, a co-polymer of a low molecular weightnpolyolefin, a hydrocarbon-based polyol, a derivative of a hydrocarbon-basednpolyol, an alkanolamine, a derivative of an alkanolamine, an organicndispersing agent, or a mixture thereof. Another aspect of the invention is tonprovide processes for producing said composition. |