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Metallized azo pigments

This is a bright scarlet shade metallized azo pigment with a chemical constitution which is not yet published. This pigment is predominantly useful in plastic applications that do not require exterior weatherfastness. [Pg.581]

Figure 1 is an example of the process of manufactiu-e for a metallized azo pigment, harium hthol red (1). Reaction with a metal salt causes the azo dye to precipitate, forming an insoluble metalhzed azo pigment. Most nonmetallized reds contain no anionic groups. [Pg.1572]

In the metal-free class of azo pigments it is remarkable that the simplest derivatives of 2-naphthol such as Hansa Red B [2425-85-6] (139) (Cl Pigment Red 3 Cl 12120 Toluidine Red) and Para Red [6410-10-2] both known since 1905, are still of importance. [Pg.455]

However, there are metal complex pigments. Without doubt the most important metal complex pigment is copper phthalocyanine (4). The phthalocyanines were discovered by accident in 19286 and now represent the second most important class of colorants after the azo colorants. Copper phthalocyanine itself exists in several polymorphic forms and gives beautiful blue and cyan colors with outstanding fastness properties.5-7 Halogenated copper phthalocyanines provide green pigments (see Section 9.12.4.3). [Pg.551]

Azo dyes and azo pigments are the most important class of both non-metallized and metallized colorants. Therefore, this section is devoted entirely to metal complex azo dyes and pigments. [Pg.551]

The l-phenylazo-2-naphthol (7) and particularly the 2-phenylazo-l-naphthol (8) systems are used extensively, providing many of the commercial metal complex azo colorants. Azo pigments are derived from (7) whilst azo dyes are obtained from (8). Both these types of colorant exist predominantly, if not exclusively, in the hydrazone tautomeric form.8,9... [Pg.552]

The use of metal complex dyes for textile and related applications has already been treated comprehensively.7 There have been few major advances since that review. Therefore, this section focuses on typical commercial metal complex dyes, key structure-property relationships, and some recent studies on metal complex azo pigments. [Pg.557]

Although metal-free azo pigments have good chemical resistance their completely covalent nature leads to a tendency to bleed in organic solvents and to migration and blooming in... [Pg.60]

The last group of metal-free azo pigments are the pyrazolone compounds, the most commonly used examples being made from the coupling component l-phenyl-3-methylpyrazol-5-one, also used in making azo dyes. The two most important pigments are... [Pg.62]

The hue of a red azo pigment lake carrying sulfonic acid functions is determined to a considerable extent by the metal ion. In the series Na->-Ba->Sr->Ca->Mn the shift of hue from yellowish to bluish red increases in the order in which they are listed. The complex correlation between chemical constitution and color in pigment molecules poses a quantum mechanical challenge. This is complicated by interactions within the crystal lattice and by the contribution of intermolecular and... [Pg.14]

Likewise, the lightfastness of an azo pigment lake is controlled to a certain extent by the metal cation manganese salts are usually most lightfast. [Pg.21]

P.Y.212 is not recommended for exterior use, but provides an excellent value for interior applications such as packaging and household durables of all types. Pigment Yellow 212 is tinctorially quite strong as metallized azos go and exhibits very good dimensional stability, making it very useful in molded items such as blow molded containers. [Pg.235]

The commercially most interesting metal complex pigments within the azo series are those obtained from aromatic o,o -dihydroxyazo compounds, while important products within the azomethine series are nickel or copper complexes of aromatic o,o -dihydroxyazomethine compounds. [Pg.389]

The commercially interesting metal complex pigments usually contain the co-ordinative tetravalent Cu+ + or Ni+ + ions, less commonly Co++ ions. The fourth coordination site is typically occupied by a solvent molecule with a free electron pair. It may also be engaged by the second nitrogen atom of a different pigment molecule, a phenomenon which is observed in azo complexes and similar materials. In the latter case, sandwich structures are obtained [5]. The copper and nickel complexes are mostly planar molecules. [Pg.389]

Commercially available azo and azomethine metal complex pigments cover the spectral range from considerably greenish to reddish yellow and yellowish orange. Compared to their parent structures (the corresponding azo and azomethine compounds), azomethine metal complexes frequently exhibit a distinctly duller shade. Formation of the metal complex often shifts the color of an originally yellow material in the greenish yellow direction. [Pg.392]

Table 25 Examples of azo and azomethine metal complex pigments. Table 25 Examples of azo and azomethine metal complex pigments.
It is only for reasons of simplified classification that the pigments which are described in this section, like azomethine metal complex pigments (Sec. 2.10.1.2), are listed in Chapter 2. Actually, rather than being azo pigments, these are azo methine and methine pigments, which in the classification system adopted in this book are formally located between azo pigments and polycyclic pigments. [Pg.401]

Pigment Orange 79 is a bright orange pigment of the metallized azo class with a chemical constitution not yet published. [Pg.580]

Some coordination compounds have been used as dyes and pigments, but it must be admitted that these applications developed without reference to the fact that the compounds are complexes. Examples of paint pigments are Prussian blue and the phthalocyanines metallized azo dyes are common in the textile industry. [Pg.29]

Metal-dye complexes play a very important role in dyestuff technology and find applications in many other fields, e.g. in analytical chemistry.119-123 Except for copper phthalocyanine, metal-azo compound complexes are the most important and the most widely used as dyes and pigments. Typical precursors are shown in Scheme 1. [Pg.42]


See other pages where Metallized azo pigments is mentioned: [Pg.234]    [Pg.235]    [Pg.582]    [Pg.102]    [Pg.123]    [Pg.384]    [Pg.1572]    [Pg.491]    [Pg.234]    [Pg.235]    [Pg.582]    [Pg.102]    [Pg.123]    [Pg.384]    [Pg.1572]    [Pg.491]    [Pg.454]    [Pg.53]    [Pg.162]    [Pg.166]    [Pg.566]    [Pg.569]    [Pg.54]    [Pg.54]    [Pg.63]    [Pg.64]    [Pg.159]    [Pg.234]    [Pg.234]    [Pg.388]    [Pg.388]    [Pg.421]    [Pg.581]    [Pg.117]   


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Azo pigment

Metal Complex Azo Dyes and Pigments

Metal pigments

Metallic pigments

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