Perylene and perinone pigment

Perylene pigments include the dianhydride and diimide of perylene tetracarboxylic acid along with derivatives of the diimide while perinone pigments are derived from naphthalene tetracarboxylic acid. 

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Perylene and perinone pigments are chemically related. The group of perylene pigments is derived from perylene-3,4,9,10-tetracarboxylic acid 67, while perinone pigments are derivatives of napthalene-l,4,5,8-tetracarboxylic acid 68 ... 

Perylene and perinone pigments are closely related chemically and are manufaemred by essentially the same route. Perylenes are diimide derivatives of perylene-3,4,9,10-tetracarboxylic acid, while perinones are derivatives of naphthalene-1,4,5,8-tetracarboxylic acid (Herbst and Hunger, 1997). 

The chemical classes of vat colours from which suitable pigments have been developed are anthraquinones, perinones, perylenes and thioindigos. Many vat dyes have been tested, but only about a dozen have met the stringent fastness standards demanded. Seven of those found suitable in all respects are shown in Table 2.1 and their chemical structures are given as 2.4 to 2.10. 

In this section a number of polycyclic pigments are discussed which have been used for a long time as vat dyes for textile fibers. Heading the list are perylene, perinone, and thioindigo pigments, as well as pigments derived from anthraquinone. 

Carbonyl pigments of a variety of types may also be classed as high-performance products. These include some anthraquinones, quinac-ridones, perylenes, perinones, isoindolines and diketopyrrolopyrroles. The chemistry of these groups of colorant is discussed in Chapter 4. Some representative examples of chemical structures of important high-performance carbonyl pigments are illustrated in Figure 9.4. 

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