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157935 
Technical Report 
Silicone polymers for the modification of titanium dioxide 
Mitchnick, M; O'Lenick, AJ, Jr 
1996 
U.S. Patent and Trademark Office 
Washington, DC 
U.S. Patent No. 5,565,591 
A silicone composition and process for hydrophobizing titanium dioxide, and the resultant hydrophobic titanium dioxide are disclosed. The silicone composition is a reactive alkoxy silicone which is applied to the titanium dioxide then in a subsequent step the coated titanium dioxide is
heated to 40 to 100 C. for between 1 and 10 hours for the reaction to occur. The resulting titanium dioxide is hydrophobic, non-reactive, and not affected by water.