Stock material or miscellaneous articles – Composite – Of silicon containing
Reexamination Certificate
2011-03-22
2011-03-22
Seidleck, James (Department: 1765)
Stock material or miscellaneous articles
Composite
Of silicon containing
C428S412000, C528S012000
Reexamination Certificate
active
07910216
ABSTRACT:
A process for forming a composition comprising organosilsesquioxanes, comprises the following steps:1. partially hydrolysing hydrolysable inorganic monomer precursors comprising at least 50 mole % of first hydrolysable inorganic monomer precursors having the formula RSiY3, in which R is an organic group, the R—Si bond is a non-hydrolysable bond, each Y group is the same as or different to one another and is selected from chemically-reactive groups such that each Si—Y bond is hydrolysable to form a Si—OH bond, to form inorganic monomers and allowing partial condensation of the inorganic monomers to form a liquid composition comprising inorganic oligomers;2. prior to complete condensation of the inorganic monomers, quenching the liquid composition with an amount of water which, in combination with the water used in step (1) and any water liberated by condensation of the inorganic monomers in step (1), is in excess of the stoichiometric amount of water required to achieve complete hydrolysis of all the hydrolysable inorganic monomer precursors present; and3. drying the composition.
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Cordes, et al., “Recent Developments in the Chemistry of Cubic Polyhedral Oligosilsesquioxanes”,Chem. Rev. 2010, vol. 110, pp. 2081-2173, Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, U.K., Published on Web Mar. 15, 2010.
Pourbohloul S. Camilla
Seidleck James
The Welding Institute
Workman Nydegger
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