- Process for the production of ester compounds
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In producing ester compound useful as an antioxidant for organic materials which are represented by the formula: STR1 wherein R1 and R2 are the same or different and represent hydrogen or straight or branched chain alkyl radicals containing 1-8 carbon atoms, Z is an organic radical derived from an n-hydroxy alcohol, and n denotes an integer of 1 to 4, by transesterification, monoalkyltin compounds are used as a catalyst, whereby the ester compounds can be produced with high quality and in high yields.
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- Polyalkylene glycol esters of hindered phenols substituted alkanoic acid
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Compounds of the formula: EQU1 WHEREIN X is oxygen or sulfur, a is an integer from 2 to 6, b is an integer from 3 to 40, and R is SPC1 Wherein R1 is an alkyl group of 1 to 8 carbon atoms, R2 is hydrogen or an alkyl group of 1 to 8 carbon atoms, and X is an integer from 0 to 6 Are useful as antioxidants for organic materials normally subject to oxidative deterioration, such as polyacetals, polypropylene, and nylon, in amounts of from about 0.005 to about 5% by weight of the composition.
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