Hydrogenfluorides of aminosilanols and their use

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#(1) Field of the Invention

#While the invention has been described with reference to preferred embodiments, those skilled in the art will understand that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is not intended that the invention be limited to the particular embodiments disclosed herein, but that the invention will include all embodiments falling within the is scope of the appended claims. All amounts and percentages are by weight, unless otherwise expressly indicated.

#Examples 1-7 illustrate the preparation of several hydrogenfluorides of aminosilanols. The hydrogenfluorides of aminosilanols are formed by the reaction of HF (49% concentration in water) and the aminoalkoxysilanes specified in Table I, which are 50% solutions in methanol. To make the hydrogenfluoride of the aminoalkoxysilane, the solution of aminoalkoxysilane in methanol was added to a plastic container, and then the HF (49% concentration in water) was added gradually and gently at room temperature, and mixed well. In Examples 1-3, a ureidoalkoxysilane in was used, while in examples 4-7, a diaminoalkoxysilane was used.

#A modest exothermic was observed, and the mixture was allowed to cool. The mixture was stored overnight to allow complete reaction. A water-thin clear liquid was obtained, which was tested to ensure no free HF exists, by placing a gram of the product into a glass container to determine whether the glass etched. If the glass does not etch, this indicates that there is no free HF in the product. The components used to make the hydrogenfluorides of aminosilanols are set forth in Table I.