Alkylamides of hindered 3,5-dialkyl-4-hydroxybenzoic acids and u

Details Alkylamides of hindered 3,5-dialkyl-4-hydroxybenzoic acids and u Alkylamides of hindered 3,5-dialkyl-4-hydroxybenzoic acids and u

1974-12-30

1976-08-03

Davis, C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 459NC, C07C10326

Patent

active

039729273

ABSTRACT:
Compounds of the formula: ##SPC1##
Wherein R.sub.1 and R.sub.2 are each branch-chain alkyl of 3 to 8 carbon atoms and R.sub.3 and R.sub.4 are each hydrogen, alkyl of 1 to 18 carbon atoms, or cycloalkyl of 5 or 6 carbon atoms are useful as light stabilizers in polyolefins. They may be prepared (a) by reacting the 3,5-di-alkyl-4-hydroxybenzoyl chloride with the appropriate amine in the presence of an acid acceptor or (b) by reacting the corresponding benzoic acid with the appropriate amine in the presence of a carbodiimide as dehydrating agent.

REFERENCES:
patent: 2959550 (1960-11-01), Young et al.
patent: 3496211 (1970-02-01), Dexter et al.
patent: 3714122 (1973-01-01), Kline
Cohen et al, JACS; 84, 1625-1628, 5--5--62.

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