Selected 4-hydroxyphenyl anilino alkoxysilanes and their use as antioxidants
AssigneeOlin Corporation
InventorsKarl O. Knollmueller, Theodore H. Fedynyshyn
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Abstract
Disclosed are selected 4-hydroxyphenyl anilino alkoxysilanes of the formula: ##STR1## 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. The compounds are disclosed to be effective antioxidants, especially in functional fluids having shielded polysilicate compounds, silicate esters, or silicone oils as base fluids.
Claims13
A 4-hydroxyphenyl anilino alkoxysilane having the formula ##STR5## 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 from 3 to 12 carbon atoms, with the proviso that at least a majority of said R' radicals are stearically hindered alkyl groups.
An oxidation-inhibited functional fluid composition comprising a base fluid component and an effective oxidation-inhibiting amount of a 4-hydroxyphenyl anilino alkoxysilane having the formula formula ##STR6##
Dependencies are inferred from the claim text.