Pigment Grades and Discussion of Individual Pigments

The properties described above qualify quinophthalone pigments for applications including high quality industrial finishes, coloring of plastics and metal deco inks. Commercial products are suppUed as powders, pigment preparations and liquid dispersions. 

which is finished at higher temperatures. The plastic grade K 0961 HD is similar to L 0960 HD in primary particle size, but differs in size of the agglomerates because of its different final milling process. 

The remission edge of L 0962 is shifted to longer wavelengths. As a result, L 0962 HD appears more reddish than L 0960 HD. 

Electrokinetic sonic amplitude (ESA) measurements (water/ethanol 4 1, Matec MBS 8000) show a very similar picture for the two quinophthalone pigments. They carry a very small negative charge and their isoelectric points are close to pH 3. Both pigments can be used in aqueous and solvent-borne systems. From the ESA-data (Table 19.4) it can be concluded that electrostatic forces play only a minor role in the stabilization of these systems. 

Paliotol Yellow D 0960 is specifically used in metal deco and screen printing inks, where its very good light- and weather fastness is required. 

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