Prevention of discoloration in substituted diphenylamines

Details Prevention of discoloration in substituted diphenylamines Prevention of discoloration in substituted diphenylamines

1978-11-22

1980-08-05

Padgett, Benjamin R.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252401, 260 459R, 260 4585H, 260809, 260799, C09K 1532

Patent

active

042161150

ABSTRACT:
Detrimental color changes in liquid diphenylamine age-resisters have been inhibited and/or reduced by combining with the age-resisters small amounts of a color inhibitor selected from the group consisting of trialkylol amines, glycol diesters of sulphur-containing monocarboxylic acids, and dialkyl esters of thiodicarboxylic acids in a weight ratio of color inhibitor to age-resister of from 0.25:99.75 to 5:95.

REFERENCES:
patent: 3502615 (1970-03-01), Rosenward
patent: 3530076 (1970-09-01), Sparks et al.
patent: 3542692 (1970-11-01), Spacht
patent: 3674705 (1972-07-01), Hytrek
patent: 3746654 (1973-07-01), Cottman
patent: 3785995 (1974-01-01), Kalil

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