PROCESS FOR THE PREPARATION OF ORTHOSILICIC ACID TETRA-ALKOXYALKYL ESTERS

摘要

The present invention is concerned with a process for the preparation of orthosilicic acid tetra-alkoxyalkyl esters. The process of the invention is characterized in that it comprises reacting silicon, iron silicide or ferrosilicon, or a mixture of two or more thereof, in particulate form with an ether alcohol in the presence of the corresponding ether alcoholate of an alkali metal, there being present during the reaction at least 70% by weight of the orthosilicic acid tetra-alkoxyalkyl ester, based on the total weight of liquid present during the reaction, and the reaction being carried out at a temperature of from 125 to 250.degree.C. The orthosilicic acid tetra-alkoxyalkyl esters obtained by the process according to the invention can be used as binders for zinc dust paints. They may also be used for binding foundry grade sands.