Abstract: The compounds are esters having the formula ##STR1## wherein R.sub.1 and R.sub.2 are each independently alkyl, cycloalkyl, alkylthioethyl or alkylpolyoxyalkylene, Z is oxygen or sulfur, R.sub.3 is the group ##STR2## R.sub.4 is hydrogen, alkyl, cycloalkyl or .alpha.-methylbenzyl, R.sub.5 is alkyl or cycloalkyl, R.sub.6 is hydrogen or alkyl and, provided when R.sub.4 is hydrogen, R.sub.6 is alkyl and R.sub.5 is located on the carbon atom ortho to the hydroxyl group, and A is a covalent carbon bond or lower alkylene.The esters of this invention are prepared by usual esterification procedures from a thioether isopropanol and an acid of formula ##STR3## or a derivative thereof, preferably the methyl ester. The thioether isopropanols are prepared by reaction of epichlorohydrin with an alcohol or mercaptan followed by the opening of the oxirane ring with a mercaptide to give the desired thioether isopropanol.

Abstract: The compounds are esters having the formula ##STR1## wherein R.sub.1 is alkyl, cycloalkyl, alkylthioethyl or alkylpolyoxyalkylene, Z is oxygen or sulfur, R.sub.2 is the group ##STR2## R.sub.3 is hydrogen, alkyl, cycloalkyl, or .alpha.-methylbenzyl, R.sub.4 is alkyl or cycloalkyl, R.sub.5 is hydrogen or alkyl, provided when R.sub.3 is hydrogen, R.sub.5 is alkyl and R.sub.4 is located on the carbon atom ortho to the hydroxyl group, and A is a covalent carbon bond or lower alkylene.

Abstract: Esters of polyalkyleneglycols with 3,5-dialkyl-4-hydroxyphenylalkanoic acids were prepared by simple esterification techniques. An example of such compounds is methoxytriethyleneglycol 3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate. These compounds are useful as stabilizers of organic substrates subject to oxidative and thermal degradation.

Abstract: The compounds are esters having the formula ##EQU1## wherein R.sub.1 is alkyl, cycloalkyl, alkylthioethyl or alkylpolyoxyalkylene, R.sub.2 is the group ##SPC1##R.sub.3 is hydrogen, alkyl, cycloalkyl or .alpha.-methylbenzyl, R.sub.4 is alkyl or cycloalkyl, R.sub.5 is hydrogen or alkyl, provided when R.sub.3 is hydrogen, R.sub.5 is alkyl and R.sub.4 is located on the carbon atom ortho to the hydroxyl group, A is a covalent carbon bond or lower alkylene, Q is the group ##SPC2##R.sub.6 and R.sub.7 are independently hydrogen or alkyl, and Z is oxygen or sulfur.The esters of this invention are prepared by usual esterification procedures from a substituted isopropanol and an acid or a derivative thereof, preferably the methyl ester.The substituted isopropanols are prepared by the reaction of bis-glycidyl ethers of polyhydric phenols or of 1,3-diglycidyl derivatives of hydantoin with a mercaptide or alkoxide.

Abstract: The compounds are esters having the formula ##EQU1## wherein R.sub.1 is alkyl, cycloalkyl, alkylthioethyl or alkylpolyoxyalkylene, Z is oxygen or sulfur, R.sub.2 is the group ##SPC1##R.sub.3 is hydrogen, alkyl, cycloalkyl, or .alpha.-methylbenzyl, R.sub.4 is alkyl or cycloalkyl, R.sub.5 is hydrogen or alkyl, provided when R.sub.3 is hydrogen, R.sub.5 is alkyl and R.sub.4 is located on the carbon atom ortho to the hydroxyl group, and A is a covalent carbon bond or lower alkylene.

Abstract: The compounds are esters having the formula ##EQU1## wherein R.sub.1 and R.sub.2 are each independently alkyl, cycloalkyl, alkylthioethyl or alkylpolyoxyalkylene, Z is oxygen or sulfur, R.sub.3 is the group ##SPC1##R.sub.4 is hydrogen, alkyl, cycloalkyl or .alpha.-methylbenzyl, R.sub.5 is alkyl or cycloalkyl, R.sub.6 is hydrogen or alkyl and, provided when R.sub.4 is hydrogen, R.sub.6 is alkyl and R.sub.5 is located on the carbon atom ortho to the hydroxyl group, and A is a covalent carbon bond or lower alkylene.The esters of this invention are prepared by usual esterification procedures from a thioether isopropanol and an acid of formula ##SPC2##Or a derivative thereof, preferably the methyl ester.The thioether isopropanols are prepared by reaction of epichlorohydrin with an alcohol or mercaptan followed by the opening of the oxirane ring with a mercaptide to give the desired thioether isopropanol.