Copper phthalocyanine green

Copper Phthalocyanine Green. CPC green is obtained by electrophilic substitution of CPC blue with chlorine, the degree of chlorination reaching 14—15 chlorines per molecule. The typical polychloro-CPCs are blue-shade green pigments. To provide yellower shades of green, substitution of... 

Largely displaced by copper phthalocyanine green pigments, this product has lost most of its commercial importance. 

Likewise, halogenated copper phthalocyanine green pigments also have a major impact on the market (Sec. 3.1.2.5). 

The early days of Copper Phthalocyanine Green synthesis were dominated by two competitive routes. One method was the synthesis of tetraphenyl copper phthalocyanine (Bayer), while the second method involved chlorination of copper phthalocyanine in carbon tetrachloride to form copper tetradeca to hexadeca-chloro phthalocyanine (BASF). It was on the grounds of economical considerations that manufacturers began to prefer the chlorination technique in industrial scale production. 

Only one cystalline modification has been reported of polyhalogenated copper phthalocyanine green pigments. This phase is closely related to a-Copper Phthalo-... 

Phthalocyanine pigments, which show high tinctorial strength, provide an excellent ratio of strength versus price. The strongest member is a-Copper Phthalocyanine Blue, while yellowish Copper Phthalocyanine Green is the weakest representative. 

The prints exhibit excellent application properties. They are, for instance, entirely fast to organic solvents, soap, alkali, and acids. They are also fast to sterilization. Metal deco prints demonstrate very good heat stability. The products withstand exposure to 200°C for 10 minutes or to 180°C for 30 minutes. Although not quite as fast to heat as halogenated types of Copper Phthalocyanine Green, P.B.15 3 is thus somewhat more heat stable than stabilized a-Copper Phthalocyanine Blue. 

Copper phthalocyanine green. See Phthalocyanine green Copper potassium sulfide Synonyms Copper lime dust... 

Organic pigments are used for special purposes. They are generally purer, but more expensive. Examples include Hansa yellow, Irgazin orange and violet, copper phthalocyanine green and blue, toluidine red, para red, Lithol red and rhodamine red (Mathias 1984 Fischer and Adams 1990). 

The epsilon form of copper phthalocyanine blue (C.I. Pigment Blue 15 6) and bro-minated copper phthalocyanine green (C.I. Pigment Green 36) are used respectively as the basic colorants for blue and green pixels in color filters. But these two pigments are not satisfactory as the primary colors in the system. 

Visible spectrophotometry has also been applied similarly to the analysis of copper phthalocyanine green (PG7). This pigment is even less soluble than the non-chlorinated phthalocyanine blue. For quantitative analysis, extreme care is needed in order to ensure that the sample is in solution. Sulfuric acid is the preferred solvent except in the case of polymeric matrices. Figure 21-3 shows the Visible spectrum of PG 7 at a concentration of 140 pg/L in DMSO (A ax is at 727.5nm). 

Figure 28-22. Absorption spectra of the sol—gel colored glass bottles using copper phthalocyanine blue 10 (a), copper phthalocyanine green and carbon black (b), and quinacridone pigment (c).

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