Discoloration inhibitors for aromatic amines

Details Discoloration inhibitors for aromatic amines Discoloration inhibitors for aromatic amines

H - Electricity

04

B

260/590.1

H04B 10/213 (2006.01)

Patent

CA 1264475

ABSTRACT DISCLORATION INHIBITORS FOR AROMATIC AMINES Substituted aromatic amines containing a discol- oration inhibiting amount of a substituted phenol selected from 2,6-dialkylphenols, 2,4,6-trialkylphenols and dibenzylphenol. A method and composition are provided for inhibit- ing discoloration of alkylated aromatic amines and diamines. A minor portion of the substituted phenol de- scribed above is combined with a fresh, water white sub- stituted aromatic amine of structure Image wherein m is 1 or 2, n is 1 to 5, m + n is not greater than 6, and the R are independently selected alkyl, cycloalkyl, aryl, aralkyl, or alkaryl, said amine being subject to gradual discoloration.

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