Patent ID: 7354982

Claim:
A method of preparing a saccharide residue-functional organopolysiloxane having the formula: Si{XR 1 2 SiO 1/2) } 4 wherein R 1 is C 1 to C 10 alkyl or aryl; and X is a group having the formula â€”R 2 â€”Sâ€”R 3 â€”Y wherein R 2 and R 3 are each independently selected from C 1 to C 20 divalent hydrocarbyl and Y is selected from a group consisting of a substituted monosaccharide, unsubstituted monosaccharide, substituted oligosaccharide, unsubstituted oligosaccharide, substituted polysaccharide and unsubstituted polysaccharide residue having an oxygen atom bonded to R 3 , comprising condensing a saccaharide residue-functional metal thiolate compound having the formula Mâ€”Sâ€”R 3 â€”Y wherein R 3 is C 1 to C 20 divalent hydrocarbyl, Y is selected from the group consisting of a substituted monosaccharide, unsubstituted monosaccharide, substituted oligosaccharide, unsubstituted oligosaccharide, substituted polysaccharide, and unsubstituted polysaccharide residue having an oxygen atom bonded to R 3 , and M is selected from the group consisting of an alkali metal atom or alkaline-earth metal atom, and an organopolysiloxane having the formula: Si{(ZR 2 )R 1 2 SiO 1/2) } 4 wherein R 1 is C 1 to C 10 alkyl or aryl; R 2 is C 1 to C 20 divalent hydrocarbyl; and Z is a group selected from the group consisting of halogen atoms, C 1 to C 10 alkylsulfonate groups, and C 6 to C 20 arylsulfonate groups.