SYNTHESES AND REACTIONS OF METAL ORGANICS .20. SYNTHESES OF SILANE-COUPLING AGENTS HAVING END-BRANCH FLUOROCARBON CHAIN AND SURFACE MODIFICATION OF GLASS

Six silane-coupling agents having end-branched fluorocarbon chains: (C F3)(2)CF(CF2)(4)CH2CH2Si(CH3)(OCH3)(2) (1); (CF3)(2)CF(CF2)(6)CH2CH2Si (CH3)(OCH3)(2) (2); (CF3)(2)CF(CF2)(8)CH2CH2Si(CH3)(OCH3)(2) (3); (CF3 )(2)CF(CF2)(4) CH2CH2Si(OCH3)(3) (4); (CF3)(2)CF(CF2)(6)CH2CH2Si(OCH3) (3) (5); (CF3)(2)CF(CF2)(8)CH2CH2Si(OCH3)(2) (6); were prepared by the hydrosilylation reaction of dichloro(methyl)silane or trichlorosilane with the corresponding end-branched 1H,1H,2H-polyfluoro-1-alkene ((CF 3)(2)CF(CF2)(n) CH=CH2, (n = 4, 6 and 8) in the presence of hydrogen h exachloroplatinate(VI), followed by reaction with sodium methoxide. Th e application for the surface modification of glass was attempted usin g these compounds. From measurements of the contact angles theta (degr ees) of water and oleic acid against a modified glass surface, it was found that the silane-coupling agents have high modification ability f or surface modification. The oxidation resistance of the modified glas s surface was also investigated.