Method of stabilizing 4,6-diaminoresorcinol and salt thereof

Details Method of stabilizing 4,6-diaminoresorcinol and salt thereof Method of stabilizing 4,6-diaminoresorcinol and salt thereof

1998-06-10

1999-06-15

Burn, Brian M.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

564418, 564423, C09K 300

Patent

active

059119080

ABSTRACT:
A method for stabilizing DAR during storage, comprising storing DAR in the presence of a reducing agent having a standard redox potential of not less than -0.20 volt and not more than 0.34 volt, in a proportion of not less than 100 ppm and not more than 10,000 ppm of DAR. The present invention improves storage stability of DAR. This in turn results in easy handling and long-term preservation of DAR. Thus, a high quality polymer PBO can be easily produced and the invention greatly contributes to the industrial field.

REFERENCES:
patent: 5001279 (1991-03-01), Yin et al.
patent: 5414130 (1995-05-01), Lysenko et al.
Database WPI, Section Ch, Week 8603, Derwent Publications Ltd., London, GB; Class E14, AN 86-017023 XP-002074568 & JP 60 239 447 abstract (1986).

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