Silanol Compound, Composition, and Method for Producing Silanol Compound
申请人:NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
公开号:US20170183363A1
公开(公告)日:2017-06-29
The purpose of the present invention is to provide silanol compounds that can be used as raw materials of siloxane compounds and the like, and a composition of the silanol compounds, as well as to provide a production method that makes it possible to produce silanol compounds at excellent yield. A composition comprising 5 mass % to 100 mass % of a silanol compound represented by Formulas (A) to (C) can be prepared by devising to produce silanol compounds under water-free conditions, to produce silanol compounds in a solvent having the effect of suppressing the condensation of silanol compounds, and to perform other such processes, the composition being able to be used as a raw material or the like of siloxane compounds because the silanol compounds can be stably present in the resulting composition.
Silicate species in solution. Part 1. Experimental observations
作者:Lesley S. Dent Glasser、Eric E. Lachowski
DOI:10.1039/dt9800000393
日期:——
Changes in the pH or concentration of sodium silicatesolutions produce changes in the degree of polymerisation of the silicatespecies, and these have been followed by the technique of trimethylsilylation. Provided that the pH remains relatively high, above ca. 10 or 11 according to concentration, equilibrium is rapidly re-established after such changes. At lower pH, equilibrium is approached more
Polymerization of silicic acid adsorbed on iron (III) hydroxide from dilute monosilicicacid solutions in the concentration range 5–40ppm (SiO2) was studied over the pH range 6–12. Silicic acid species formed on the hydroxide were trimethylsilylated and trimethylsilyl derivatives were detected by gas chromatography. Monosilicicacid adsorbed polymerized, and dimer (Si2O76−), linear trimer (Si2O108−)