Classification of pigments in the chemical industry
The pigments in the chemical industry can be mainly divided into two categories: organic pigments and inorganic pigments.
Organic pigments
Organic pigments are usually obtained through chemical synthesis and have the characteristics of bright color, strong chromaticity, and a wide variety. However, they may not be as good as inorganic pigments in terms of weather resistance and solvent resistance. Organic pigments are widely used in ink, coatings, plastics, and other fields, and their properties can be improved through modification treatments such as core-shell, coating, and surface modification methods.
inorganic pigment
Inorganic pigments are generally composed of mineral substances, which have the characteristics of sun resistance, weather resistance, high temperature resistance, good solvent resistance, and strong covering power. However, the chromatography is relatively incomplete, and the color brightness may not be as good as organic pigments. Inorganic pigments can be divided into natural pigments and synthetic pigments according to production methods, and can be classified into coloring pigments, anti rust pigments, special pigments (such as high-temperature pigments, pearl pigments, fluorescent pigments), etc. according to their functions.
Specific types
Blue inorganic pigments: including iron blue, cobalt blue, ultramarine, etc. Qunqing is alkali resistant but not acid resistant, with a bright and bright color, and high temperature resistance; Cobalt blue has high temperature resistance and excellent light resistance, but its coloring and covering power are slightly inferior.
Yellow inorganic pigments: mainly including lead chrome yellow (lead chromate), zinc chrome yellow (zinc chromate), cadmium yellow (cadmium sulfide), and iron yellow (hydrated iron oxide). Lead chrome yellow has a wide range of applications, strong covering power, bright color, but is prone to darkening; Cadmium yellow has good heat and light resistance, but the cost is relatively high.
Red inorganic pigment: mainly iron oxide red, with excellent chemical resistance, color retention, and dispersibility, commonly used in floor paint, ship paint, etc.
application area
Pigments are widely used in various fields due to their coloring, decorative, and protective functions
Art field: used for coloring art works such as painting and sculpture.
Industrial sector: In the production process of industrial products such as coatings, inks, plastics, rubber, and paper.