Isocyanurate esters of carboxyalkylthioalkanoesterphenol compounds and polyolefin polymeric compositions stabilized therewith
AssigneeMallinckrodt Inc.
InventorNeil Dunski
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Abstract
Isocyanurate esters of carboxyalkylthioalkanoesterphenols useful in the stabilization of organic materials normally susceptible to oxidative degradation are prepared by reacting an appropriate isocyanurate trithiol, which is a selected tris-mercapto alkanoic acid ester of tris-(2-hydroxyethyl) isocyanurate with an appropriate alkenyl compound, which is a selected 4-hydroxy-(mono- or di-alkyl)phenyl alkyl alkenoate. In a preferred embodiment, the ester is 1,3,5-tris [( 3,5-di-tert-butyl-4-hydroxyphenyl)-(3-propyl) oxycarbonylethylthiopropionyloxyethyl] isocyanurate.
Claims9
An ethyl isocyanurate carboxyalkylthioalkanoesterphenol compound having the following Formula I:
- ##STR6## where Y is a monovalent group having the following Formula II:
- ##STR7## where R.sub.1 is an alkyl group containing from 1 to 8 carbon atoms or a cycloalkyl group containing from 5 to 12 carbon atoms;
- R.sub.2 is hydrogen, an alkyl group containing from 1 to 8 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 p is a selected integer from 1 to about 8;
- and X is Y or --OH.
Dependencies are inferred from the claim text.