Process for the preparation of the hydroxydiphenylamine ester of

Details Process for the preparation of the hydroxydiphenylamine ester of Process for the preparation of the hydroxydiphenylamine ester of

1989-09-05

1991-08-06

Kight, III, John

Chemistry: natural resins or derivatives; peptides or proteins;

Natural resins or derivatives

Rosin or derivative used as starting material in process, or...

530218, 524270, C08L 9304

Patent

active

050379569

ABSTRACT:
The present invention relates to the preparation of the p-hydroxydiphenylamine ester of rosin acid. The process involves first reacting hydroquinone and aniline in the presence of a bentonite catalyst to form a reaction mixture containing p-hydroxydiphenylamine. To this reaction mixture is added rosin acid under esterification conditions to form the p-hydroxydiphenylamine ester.

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