Surface-modified titanium dioxide
AssigneeDegussa AG
InventorsKlaus Deller, Dieter Kerner, Juergen Meyer
Life of this patent
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Abstract
A product obtained by treating surface-modified, pyrogenically produced titanium dioxide with at least one ammonium-functional silane, such as by spraying the pyrogenically produced titanium dioxide with the at least one silane, alone or in ethanol solution, and tempering, and useful in the field of cosmetics in sunblocks, in toner powders, in paints and varnishes, in silicone rubber, as abrasives and polishes, for example, in the field of CMP.
Claims22
A product obtained by treating surface-modified, pyrogenically produced titanium dioxide with at least one ammonium-functional silane.
A process for treating surface-modified, pyrogenically produced titanium dioxide with at least one ammonium-functional silane comprising spraying said at least one silane alone or in an ethanol solution onto said titanium oxide, optionally in the presence of water or dilute acid, while mixing said titanium oxide in a mixing unit, and then further stirring for about 10 to 30 minutes and subsequently tempering for between about 0.5 and 6 hours at a temperature of about 100 to 400° C.
A product obtained by treating surface-modified, pyrogenically produced titanium dioxide with at least one ammonium-functional silane, said treating comprising spraying said at least one silane alone or in an ethanol solution onto said titanium oxide, optionally in the presence of water or dilute acid, while mixing said titanium oxide in a mixing unit, and then further stirring for about 10 to 30 minutes and subsequently tempering for between about 0.5 and 6 hours at a temperature of about 100 to 400° C.
Dependencies are inferred from the claim text.