28 Disazo (Bishydrazone) condensation pigments
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Robert Christie
Abstract
Disazo condensation pigments were developed in the mid-twentieth century as a range of high-performance azo pigments to meet the stringent demands placed on the technical properties required for applications in growing markets such as automotive paints, plastics, and fibers. The commercial products vary in shade from yellow through red to brown. Structurally, the pigments are related to the classical yellow azoacetoacetanilides or red azonaphthols by synthetically connecting two monoazo derivatives by a condensation reaction involving an aromatic diamine. The resulting pigment molecules are of extremely large molecular size with the presence of several amide groups, factors that determine their excellent set of fastness properties. The procedures used in their manufacture involve complex and demanding multistage processes, and this explains the higher cost of these pigments. The application performance attributes provided by the individual commercial products are discussed in detail in the final section.
Abstract
Disazo condensation pigments were developed in the mid-twentieth century as a range of high-performance azo pigments to meet the stringent demands placed on the technical properties required for applications in growing markets such as automotive paints, plastics, and fibers. The commercial products vary in shade from yellow through red to brown. Structurally, the pigments are related to the classical yellow azoacetoacetanilides or red azonaphthols by synthetically connecting two monoazo derivatives by a condensation reaction involving an aromatic diamine. The resulting pigment molecules are of extremely large molecular size with the presence of several amide groups, factors that determine their excellent set of fastness properties. The procedures used in their manufacture involve complex and demanding multistage processes, and this explains the higher cost of these pigments. The application performance attributes provided by the individual commercial products are discussed in detail in the final section.
Chapters in this book
- Frontmatter I
- Preface V
- Contents VII
- List of contributors XV
- 23 Color measurement 407
- 24 Cyanine dyes 465
- 25 Diarylethene dyes 503
- 26 Diketopyrrolopyrrole (DPP) pigments 525
- 27 Dioxazine pigments 535
- 28 Disazo (Bishydrazone) condensation pigments 543
- 29 Disazo (Bishydrazone) pigments based on acetoacetanilides 555
- 30 Disazo (Bishydrazone) pigments based on pyrazolones 571
- 31 Dyes: quantum chemical calculation of electronic spectra 577
- 32 Effect pigments 605
- 33 Fluorescence and fluorescent dyes 611
- 34 Fulgide dyes 651
- 35 Hemicyanine dyes 671
- 36 Hemioxonol dyes 685
- 37 Historical pigments, dyes and binders 691
- 38 Indophenol and related dyes 749
- 39 Inorganic luminescent pigments 765
- 40 Iron blue pigments 777
- 41 Iron oxide pigments 783
- 42 Merocyanine dyes 799
- 43 Metal complex pigments 815
- 44 Metal effect pigments 829
- Index 849
Chapters in this book
- Frontmatter I
- Preface V
- Contents VII
- List of contributors XV
- 23 Color measurement 407
- 24 Cyanine dyes 465
- 25 Diarylethene dyes 503
- 26 Diketopyrrolopyrrole (DPP) pigments 525
- 27 Dioxazine pigments 535
- 28 Disazo (Bishydrazone) condensation pigments 543
- 29 Disazo (Bishydrazone) pigments based on acetoacetanilides 555
- 30 Disazo (Bishydrazone) pigments based on pyrazolones 571
- 31 Dyes: quantum chemical calculation of electronic spectra 577
- 32 Effect pigments 605
- 33 Fluorescence and fluorescent dyes 611
- 34 Fulgide dyes 651
- 35 Hemicyanine dyes 671
- 36 Hemioxonol dyes 685
- 37 Historical pigments, dyes and binders 691
- 38 Indophenol and related dyes 749
- 39 Inorganic luminescent pigments 765
- 40 Iron blue pigments 777
- 41 Iron oxide pigments 783
- 42 Merocyanine dyes 799
- 43 Metal complex pigments 815
- 44 Metal effect pigments 829
- Index 849
