Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Reexamination Certificate
2007-08-21
2007-08-21
Barts, Samuel (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
Reexamination Certificate
active
11314423
ABSTRACT:
The present invention relates to a ω-[2-(polyalkyleneoxy)ethylthio]alkylalkoxysilane derivative and a preparation method thereof, more particularly to a ω-[2-(polyalkyleneoxy)ethylthio]alkylalkoxysilane derivative prepared by transforming a (ω-mercaptoalkyl)alkylalkoxysilane compound into a ω-(alkoxysilyl)alkylthiolate metal salt by treating it with a metallic base and performing dehalometallation at low reaction temperature using a poly(alkyleneoxy)alkyl ether halide or a poly(alkyleneoxy)bis(haloalkyl) ether to form a carbon-sulfur bond and a preparation method thereof. The novel compound of the present invention has not only a Si—OR bond but also contains a sulfur atom in the molecule, so that it can be used as monomer for synthesizing hydrophilic functional silicon polymers, source material of silicon-based surfactants and surface modifier of organic/inorganic materials. In addition, the preparation method of the compound is an economical one as the reaction can be performed at room temperature, the production yield is high and the reaction byproduct (metal halide) can be easily removed by filtration.
REFERENCES:
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Lecamp et al ( Eur. Poly. J. vol. 33, No. 7 pp. 1021-1029, 1997.
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A. Kh. Sharipov; “Oxidation of Sulfides with Hydrogen Peroxide to Sulfoxides and Sulfones”;Organic Synthesis and Industrial Organic Chemistry; Russian Journal of Applied Chemistry, vol. 76, No. 1, 2003, pp. 108-113.
Cho Joo-hyun
Han Joon Soo
Jeon Yoo Kyoung
Lim Weon Cheol
Yoo Bok Ryul
Barts Samuel
Frommer & Lawrence & Haug LLP
Korea Institute of Science and Technology
Santucci Ronald R.
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