US 4,634,728 A · Polyol carboxyalkylthioalkanoamidophenol compounds and organic material stabilized therewith

Abstract

Polyol carboxyalkylthioalkanoamidophenol compounds useful in the stabilization of organic materials normally susceptible to oxidative degradation are prepared by (A) reaction of an appropriate polythiol, which is a selected tetra-(mercapto alkanoic acid) ester of pentaerythritol or a selected tri-(mercapto alkanoic acid) ester of a selected 1,1,1-trimethylolalkane, with an appropriate alkenyl compound, which is a selected N-alkenoyl[4-amino(mono- or dialkyl)phenol] or (B), where the alkanol moiety is a sole methylene group, by reaction of pentaerythritol or an appropriate 1,1,1-trimethylolalkane with an appropriate mercapto-N(mono- or di-alkyl-4-hydroxyphenylalkamide) alkanoic acid. In a preferred embodiment, the compound is pentaerythritol tetrakis[3-mercapto-N-(3',5'-di-ti-butyl-4'-hydroxyphenyl propanamide) propionate].

Claims16

Dependent claims

A polyol carboxyalkylthioalkanoamidophenol compound having the following Formula I:

##STR4## where Y is a monovalent group having the following Formula II:
##STR5## where R.sub.1 is an alkyl group containing from one to eight carbon atoms or a cycloalkyl group containing from five to 12 carbon atoms;
R.sub.2 is hydrogen, an alkyl group containing from one to eight carbon atoms or a cycloalkyl group containing from 5 to 12 carbon atoms;
m is a selected integer from 1 to about 10, and n is a selected integer from 1 to about 14;
and Z is --CH.sub.2 Y or an alkyl group containing from one to about 8 carbon atoms.

2 more elements

Dependencies are inferred from the claim text.

Polyol carboxyalkylthioalkanoamidophenol compounds and organic material stabilized therewith

Life of this patent

Polyol carboxyalkylthioalkanoamidophenol compounds and organic material stabilized therewith

Life of this patent

Abstract

Claims16