43 Metal complex pigments
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Robert Christie
Abstract
There are several commercially significant metal complex organic pigments that are based on first row transition metals. The most important of these are the copper phthalocyanine blue and green pigments which find virtually universal use in paints, printing inks, and plastics. These pigments are of such prime importance that they are dealt with separately in three other chapters in this series. This paper describes a group of pigments that are complexes of iron, copper, nickel, and cobalt with polydentate colored ligands of azo, azomethine, oxime, and isoindoline chemical types. The oldest metal complex organic pigment that still finds some use is CI Pigment Green 8, an octahedral oxime iron complex. In the 1970s and 1980s, there was considerable industrial research effort aimed at developing metal complex pigments based on azomethine and isoindoline structures, many of which were found to offer excellent lightfastness, good solvent resistance and thermal stability, although they exhibited rather dull colors. However, several products provide brilliant effects when used in combination with metallic and pearlescent pigments in automotive paints. Many of the pigments introduced have since been withdrawn by the original manufacturers, but a few remain on the market. The synthesis of metal complex pigments generally involves the preparation of the colored ligand, which is then complexed with the transition metal ion
Abstract
There are several commercially significant metal complex organic pigments that are based on first row transition metals. The most important of these are the copper phthalocyanine blue and green pigments which find virtually universal use in paints, printing inks, and plastics. These pigments are of such prime importance that they are dealt with separately in three other chapters in this series. This paper describes a group of pigments that are complexes of iron, copper, nickel, and cobalt with polydentate colored ligands of azo, azomethine, oxime, and isoindoline chemical types. The oldest metal complex organic pigment that still finds some use is CI Pigment Green 8, an octahedral oxime iron complex. In the 1970s and 1980s, there was considerable industrial research effort aimed at developing metal complex pigments based on azomethine and isoindoline structures, many of which were found to offer excellent lightfastness, good solvent resistance and thermal stability, although they exhibited rather dull colors. However, several products provide brilliant effects when used in combination with metallic and pearlescent pigments in automotive paints. Many of the pigments introduced have since been withdrawn by the original manufacturers, but a few remain on the market. The synthesis of metal complex pigments generally involves the preparation of the colored ligand, which is then complexed with the transition metal ion
Kapitel in diesem Buch
- 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
Kapitel in diesem Buch
- 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
