No abstract

The article contains sections titled: 1. Introduction 2. Physical and Technical Properties 2.1. General Aspects 2.2. Dispersibility 2.2.1. Pigment Powders 2.2.2. Pigment Preparations 2.3. Crystal Modifications 3. Uses 3.1. Printing Inks 3.2. Paints and Coatings 3.3. Plastics 3.4. Other Uses 4. Azo Pigments 4.1. Production 4.1.1. Diazotization 4.1.2. Coupling 4.1.3. Special Features of Azo Pigment Synthesis 4.2. Yellow and Orange Monoazo Pigments 4.2.1. Yellow Monoazo Pigments (Hansa Yellow Pigments) 4.2.2. Monoazopyrazolone Pigments 4.3. Disazo Pigments 4.3.1. Diarylide Pigments 4.3.2. Bis( N ‐acetoacetarylide) Pigments 4.4. β‐Naphthol Pigments 4.5. Azo Pigment Lakes 4.5.1. β‐Naphthol Pigment Lakes 4.5.2. 2‐Hydroxy‐3‐naphthoic Acid Pigment Lakes (BON Pigments) 4.5.3. Other Pigment Lakes 4.6. Naphtol AS Pigments 4.7. Benzimidazolone Pigments 4.8. Disazo Condensation Pigments 4.8.1. Yellow Pigments 4.8.2. Orange, Red, and Brown Pigments 4.8.3. Properties 5. Metal‐Complex Pigments 5.1. Azo Metal‐Complex Pigments 5.2. Azomethine Metal‐Complex Pigments 5.3. Miscellaneous Metal‐Complex Pigments 6. Isoindolinone and Isoindoline Pigments 6.1. Azomethine Type: Tetrachloroisoindolinone Pigments 6.2. Methine Type: Isoindoline Pigments 7. Phthalocyanine Pigments 8. Quinacridone Pigments 8.1. Production 8.1.1. Synthesis 8.1.2. Aftertreatment 8.2. Properties 9. Perinone Pigments 10. Perylene Pigments 11. Anthraquinone Pigments 11.1. Hydroxyanthraquinone Pigments 11.2. Aminoanthraquinone Pigments 11.3. Heterocyclic Anthraquinone Pigments 11.3.1. Anthrapyrimidine Pigments 11.3.2. Indanthrone and Flavanthrone 11.4. Polycarbocyclic Anthraquinone Pigments 11.4.1. Pyranthrone Pigments 11.4.2. Anthanthrone Pigments 12. Diketopyrrolopyrrole (DPP) Pigments 13. Thioindigo Pigments 14. Dioxazine Pigments 15. Triphenylmethane Pigments 15.1. Free Sulfonic Acids (“Alkali Blue” Types) 15.2. Dye Salts with Complex Anions 16. Quinophthalone Pigments 17. Fluorescent Pigments 18. Environmental Aspects 18.1. Toxicology 18.2. Ecology 18.3. Impurities

No abstract

A previous paper had shown that milling organic pigments at elevated temperatures often improves colour development through better wetting. The present investigation shows that heat can, nevertheless, have an overall adverse effect on colour strength and hue of pigments which partially dissolve (and subsequently recrystallise) in a vehicle system under the combined action of heat and impact. Likewise, metastable polymorphic pigments should be dispersed at the lowest possible temperature to minimise hue shifts and/or loss of colour strength.

No abstract