Copper phthalocyanine green, organic

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. 

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 printing ink industry utilizes P.Gr.7 particularly for packaging printing inks. In this area, however, green shades are frequently also produced by combining the less expensive (3-Copper Phthalocyanine Blue with suitable organic yellow pigments. 

Pcrchloro- and pcrchlorobromo copper phthalocyanine arc important organic green pigments. They are accessible through direct chlorination of copper phthalocyanine in a eutectic melt of aluminum and sodium chloride or in a chlorosulfonic acid medium. Bromine can he used instead of chlorine in the MCI—NaCl melt to obtain polybromochloio copper phthalocyanine. 

Salt Attrition. The crude is ground in a ball mill or a double-arm, sigma blade mixer in the presence of a large excess of sodium chloride and an organic solvent such as diethylene glycol or xylene to give the green-shade, beta copper phthalocyanine blue. 

Colorants Coloration of plastics, dyes, organic and inorganic pigments Benzidene (diarylide) (yellow), nickel azo (yellow), benzimidazole, copper phthalocyanine (blue-green) and isoindolinone (yellow-orange and reds), heavy metal oxides and sulfides, heavy metals and titanium dioxide, dihydroindolizine (DHI) and thermochromic antimony... 

Blue and green organic pigment molecules have complicated, non-azo polycyclic stmctures, or are complexes with metals such as copper. Blue phthalocyanine, for example, is a classical pigment that is relatively low cost, bright, transparent, food-friendly, and heat- and weather-stable. Different crystal forms of "phthalo" provide different shades of green or blue. 

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