4-Anilinophenoxy alkoxysilanes and their use as antioxidants.

摘要

Disclosed are selected 4-hydroxyphenyl anilino alkoxysilanes of the formula:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="21" wi="42" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R is hydrogen or a lower alkyl group having from 1 to 4 carbon atoms and each R' is individually selected from an alkyl group having 3 to 12 carbon atoms with the proviso that at least a majority of said R' radicals are sterically hindered alkyl groups. These compounds are disclosed to be effective antioxidants, especially in functional fluids having shielded polysilicate compounds, silicate esters, or silicone oils as base fluids.