Esters and amides of trisubstituted hydroxyphenylalkanoic acids

Details Esters and amides of trisubstituted hydroxyphenylalkanoic acids Esters and amides of trisubstituted hydroxyphenylalkanoic acids

1976-05-03

1977-09-20

Demers, Arthur P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260268C, 260465F, 260521R, 260 458NE, 260 4585B, 260 459NC, 260520R, 560 56, 560 75, C07C10326

Patent

active

040497135

ABSTRACT:
The compounds are esters and amides of trialkylhydroxyphenylalkanoic acid having the formula ##STR1## wherein R, R.sup.1 and R.sup.2 are independently lower alkyl or cycloalkyl groups, R.sup.3 is hydrogen, alkyl, cycloalkyl, alkylene, phenyl, phenyl substituted by alkyl groups, alkylthioethyl, thiobis-alkylene, alkyleneoxyalkylene, polyoxyalkylene or a polyvalent cyclic or acyclic hydrocarbon radical, R.sup.4 is hydrogen, lower alkyl, cycloalkyl, R.sup.5 is hydrogen, alkyl, phenyl, phenyl substituted with alkyl groups, alkylene, polyoxyalkylene or polyvalent cyclic or acyclic hydrocarbon radical, A is lower alkylene, m is 1 to 4 and n is 1 to 6.
The compounds are useful as stabilizers for organic materials, especially polyolefins, which deteriorate upon exposure to light and heat.

REFERENCES:
patent: 3247240 (1966-04-01), Meier et al.
patent: 3496211 (1970-02-01), Dexter et al.
patent: 3526653 (1970-09-01), Shen et al.
patent: 3677965 (1972-07-01), Dexter et al.
patent: 3906033 (1975-09-01), Biland et al.
patent: 3906041 (1975-09-01), Hofer
patent: 3917672 (1975-11-01), Schmidt
patent: 3925161 (1975-12-01), Schlichting et al.

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