Method for preparing an organo-silicon sol and materials...

Details Method for preparing an organo-silicon sol and materials... Method for preparing an organo-silicon sol and materials...

2007-01-02

2007-01-02

Peng, Kuo-Liang (Department: 1712)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C528S012000, C528S491000, C528S494000, C528S501000, C549S215000

Reexamination Certificate

active

10610015

ABSTRACT:
The method consists in hydrolysing an initial volume Vse of a precursor material comprising at least one polyalkoxysilane with a quantity of water such thatx⁢⁢H2⁢Ox⁢⁢Si≥10,⁢andwhere x H20 and x Si represent the number of moles of H20 and Si present, respectively, the concentration of the hydrolysate up to a volume substantially equal to the initial volume Vsi, leaving the concentrated hydrolysate until segregation into an aqueous phase and an organo-silicon phase, and recovery of the organo-silicon phase. A product can be obtained which comprises an organo-silicon sol comprising silicon species T1, T2, and T3, wherein the molar fraction of species T2is equal or greater than 50%, comprising a condensation rate equal to or greater than 0.65, and further defined as lacking water, as determined by analyzing a sample of said organo-silicon sol by1H NMR and observing the absence of peak corresponding to water.

REFERENCES:
patent: 5096942 (1992-03-01), Long et al.
patent: 0089279 (1983-09-01), None
patent: 0614957 (1994-09-01), None
patent: 2493301 (1982-05-01), None
patent: 03 006276 (1991-01-01), None
patent: 04 044838 (1992-02-01), None
patent: 05 163463 (1993-06-01), None
patent: 05 306339 (1993-11-01), None
patent: WO 94/25406 (1994-11-01), None
Hancock et al., Pharmaceutical Research, 11(4), 471-477 (1994).
Darracq et al., “Novel photorefractive sol-gel materials,”Optical Materials, 9:265-270, 1998.
Vainrub et al., “Sol-gel polymerization in alkoxysilanes:29Si NMR study and simulation of chemical kinetics,”Materials Science&Engineering B, B37:197-200, 1996.
Xue et al., “Chemical reactions of an epoxy-functional silane in aqueous solutions,”Rubber Chem Technol, 64(2):162-171, 1991.
International Search Report Dated Jan. 26, 2000.

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