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What Is The Mechanism Of Organic Pigments?

  What is the mechanism of organic pigments?

  Organic pigments can be further classified according to the number of azo contained in the pigment molecule, or the structural characteristics of the DIAZO component and the coupling component. Single azo yellow and orange pigments single azo yellow and orange pigments refer to pigment molecules containing only one azo and their chromatographic color is yellow and orange, and the coupling components of these pigments are mainly acetyl-acetyl aniline and its derivatives and pyrazole derivatives.

  The manufacturing process of single azo yellow and orange pigments is relatively simple, many varieties, mostly have a good fastness to sunburn, but due to the small molecular weight and other reasons, their solvent resistance and migration performance is not ideal, single azo yellow and orange pigments are mainly used in the general quality of air dry paint, latex paint, printing inks and office supplies.

  Double Azo pigments are pigments that contain two of azo in a pigment molecule, this kind of pigment production process is relatively complex, the color spectrum has yellow, orange and red, the organic pigment fastness is not ideal, but the solvent resistance and migration performance is good, mainly used in the general quality of printing inks and plastics, less for paint.

  Naphthol series pigments from a chemical structure, Naphthol series of pigments also belong to azo pigments, but they take naphthol as the coupling component and the color spectrum is mainly orange and red, in order to distinguish it from yellow and orange single azo pigments, it is classified as Naphthol series pigments. Their fastness to sunburn, solvent-resistant properties and migration resistance are ideal.

  But not alkali, the production process of the degree of difficulty with the general significance of the single azo pigments, organic pigments are mainly used in the need for high fastness to paint and paint, naphthol as series pigment color phenol as pigment is the pigment molecule with the color phenol as and its derivatives as the coupling component of pigments, the production of this kind of pigment is slightly more difficult than the general azo pigments, chromatography has yellow, orange, red, purple, magenta, brown and purple, their fastness to sunburn, solvent resistance and migration performance generally, Mainly used for printing inks and paints.

  Azo-color deposition pigments Such pigments of the precursor is water-soluble dyes, the molecule contains sulfonate and carboxylic acid base, and the role of precipitation agent to produce insoluble pigments, the precipitation agent used is mainly inorganic acid, inorganic salts and carriers, the production of organic pigments is difficult to degree with the general single azo pigments, the color spectrum is mainly yellow and red, their fastness to sunburn, solvent resistance and migration performance generally, mainly for printing inks.


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