SYNTHESES OF TITANIUM BUTOXIDE TRIS(POLYFLUOROALKANOATE) AND SURFACE MODIFICATION OF CALCIUM-CARBONATE

Titanium butoxide tris(5H-octafluoropentanoate), Ti(O(n)C4H9)[OCO(CF2)4H]3, titanium butoxide tris(7 H-undecafluoroheptanoate), Ti(O(n)C4H9)[OCO(CF2)6H]3, titanium butoxide tris(9 H-hexadecafluorononanoate), Ti(O(n)C4H9)[OCO(CF2)8H]3, and titanium butoxide tris(perfluorooctanoate), Ti(O(n)C4H9)[OCO(CF2)6CF3]3, were prepared by the reaction of titanium butoxide trichloride with sodium fluoro-substituted acylates in 1,1,2-trichloro-1,2,2-trifluoroethane. These compounds were characterized on the basis of elemental analysis as well as their IR, H-1 NMR, C-13 NMR, and F-19 NMR spectra. In the compounds produced, a Ti-OCO bond was stable in water, although a Ti-OR bond was only moderately stable in water. A surface modification against calcium carbonate was attempted by using these products. From measurements of the contact angles theta-(degrees) of water and toluene against a modified calcium carbonate surface, titanium butoxide tris(perfluorooctanoate) was found to be an effective substance for a new-type coupling agent, which increases the affinity between organofluoro polymers and some inorganic substances.