Reducing the coloration of aromatic diamines

Details Reducing the coloration of aromatic diamines Reducing the coloration of aromatic diamines

1998-04-07

1999-02-23

Burn, Brian M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C07C20938

Patent

active

058746196

ABSTRACT:
Existing coloration of a liquid ring-polyalkyl-substituted aromatic primary diamine is reduced by blending into such diamine a color-reducing amount of at least one dihydrocarbylhydroxylamine. Preferably, the resultant product is stored in a closed container under an inert atmosphere.

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patent: 3432578 (1969-03-01), Martin
patent: 3644278 (1972-02-01), Klemchuk
patent: 3778464 (1973-12-01), Klemchuk
patent: 3926909 (1975-12-01), Wei
patent: 4316996 (1982-02-01), Collonge et al.
patent: 4386224 (1983-05-01), Deetman
patent: 4717748 (1988-01-01), Revichandran et al.

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