Abstract: Compounds of the formula ##STR1## wherein, X is from 1 to 12; Z is a member selected from the group consisting of --H, --NH.sub.4, alkali metal, lower alkyl and lower hydroxyalkyl; R is a member selected from the group consisting of ethylene, 1,2-propylene, 1,2-butylene, 2,3-butylene, styrlene and mixtures thereof; R' is selected from the group consisting of substituted or unsubstituted alkylene, alkenylene, cycloalkenylene and cycloalkylene moieties containing at least two nuclear carbon atoms and in which any substituent is selected from the group consisting of carboxy, halo and lower alkyl substituents; M is a member selected from the group consisting of hydrocarbon of 1-20 carbon atoms --RO--H, and ##STR2## wherein R, X, R' and Z are as above defined; and p is an integer from 0-1, providing when p is 0, ##STR3## IS HYDROGEN, ARE NON-STAINING OR SLIGHTLY STAINING ANTIOXIDANTS POSSESSING ANTIOZONANT PROPERTIES FOR USE AS ANTIDEGRADANTS IN COMBINATION WITH OXIDIZABLE ORGANIC SUBSTRATES.

Abstract: Compounds of the formula ##STR1## wherein, X is from 1 to 12; Z is a member selected from the group consisting of --H, --NH.sub.4, alkali metal, lower alkyl and lower hydroxyalkyl; R is a member selected from the group consisting of ethylene, 1,2-propylene, 1,2-butylene, 2,3-butylene, styrylene and mixtures thereof; R' is selected from the group consisting of substituted or unsubstituted alkylene, alkenylene, cycloalkenylene, arylene and cycloalkylene moieties containing at least two nuclear carbon atoms and in which any substituent is selected from the group consisting of carboxy, halo and lower alkyl substituents; M is a member selected from the group consisting of hydrocarbon of 1-20 carbon atoms, --RO).sub.x H, and ##STR2## wherein R, X, R' and Z are as above defined; and P is an integer from 0-1, providing when p is 0, ##STR3## is hydrogen, are non-staining or slightly staining antioxidants possessing antiozonant properties for use as antidegradants in combination with oxidizable organic substrates.

Abstract: Mercaptophenols are selectively oxyalkylated at the mercapto function by a two-step process comprising reacting the mercaptophenol with a silylating agent to form novel silylated mercaptophenol derivatives and thereafter oxyalkylating the phenolic mercapto function to the degree of oxyalkylation desired. Simple hydrolyzing of the resulting product breaks the silylation block forming a hydrolyzed oxyalkylated mercaptophenol.

Abstract: Mercaptophenols are selectively oxyalkylated at the mercapto function by a two-step process comprising reacting the mercaptophenol with a silylating agent to form novel silylated mercaptophenol derivatives and thereafter oxyalkylating the phenolic mercapto function to the degree of oxyalkylation desired. Simple hydrolyzing of the resulting product breaks the silylation block forming a hydrolyzed oxyalkylated mercaptophenol.