Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1997-07-31
1999-03-16
Yoon, Tae
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
106496, 534588, 534820, C08K 523, C09B 2700, C09B 4332
Patent
active
058831673
ABSTRACT:
A process for the preparation of diazo pigment mixtures, which comprises condensing 2 mol of an azocarboxylic acid chloride of formula ##STR1## with 1 mol of a mixture of diamines of formulae ##STR2## at a molar ratio of II:III:IV from 0-30:5-60:40-95,
the condensation and isolation of the product obtained being carried out by customary methods.
The diazo pigment mixtures so obtained are distinguished by high color strength and chroma.
REFERENCES:
patent: 5518539 (1996-05-01), Hao et al.
Derwent Abstract 77-35332Y (JP 52043848).
Chem. Abstr. vol. 83, No. 2, 12161e, (1975).
Andrey Daniel
Medinger Bernhard
Ciba Specialty Chemicals Corporation
Levine Jacob M.
Yoon Tae
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