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Synthesis of derivatives of Naphtol AS containing polar groups and modification used for C.I. Pigment Red 57

Authors
Journal
Dyes and Pigments
0143-7208
Publisher
Elsevier
Publication Date
Volume
40
Identifiers
DOI: 10.1016/s0143-7208(98)00053-9
Keywords
  • C.I. Pigment Red 57
  • Naphtol As Derivative
  • Modifier
  • Mixed Coupling

Abstract

Abstract The synthesis of derivatives of Naphtol AS containing polar groups (–COOH, –SO 3H) and factors affecting the reaction have been studied. Four derivatives of Naphtol AS containing –COOH or –SO 3H groups in the 3- or 4- position of the phenyl ring were synthesized. Derivatives of Naphtol AS as the second coupling component were used in mixed coupling and the effect of its added amount on the colour strength, hue, flowability and dispersing extent (in water) of pigments was studied.

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