Dye and Pigment Intermediates

What is dye and pigment intermediates?

Dye and pigment intermediates also known as intermediates, it refers to various aromatic derivatives used in the production of dyes and organic pigments. They are produced through a series of organic synthesis unit processes using aromatic hydrocarbons such as benzene, toluene, naphthalene and anthracene from coal chemical and petrochemical industries as basic raw materials.

Dye and pigment intermediates are designed to add special properties and they are included in small amounts when formulating specific products. Used as a base for dyes, coloring cotton and viscose fibers, preparing fast pigment dyes and organic dyes.

Applications of Dye and Pigment Intermediates:

Dye and Pigment Intermediates are widely applied in color production industries such as textiles, inks, paper coatings, plastics and paints etc.

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Difference between dye and pigment:

Pigment

Pigment is a fine powdery colored substance, generally insoluble in water, oil and solvent, but can be uniformly dispersed in it. Pigments are the secondary film-forming substances of color paints, and are often used in the preparation of primers, putties and wood coloring in the wood decoration process. Opaque paints have a certain color and hiding power due to the inclusion of pigments. At the same time, the pigment can also enhance the durability, weather resistance and abrasion resistance of the coating film.

Dye

Unlike pigments, dyes are colored substances that can be dissolved in liquids such as water, alcohol, oil or other solvents. The dye solution can penetrate into the wood and undergo complex physical and chemical reactions with the constituent substances of the wood (cellulose, lignin and hemicellulose), which can color the wood without blurring the texture of the wood, and can dye the wood bright and firm.

Moreover, they differ in their lightfastness (how much they fade when exposed to light). Pigments have the ability to resist this fading process, whereas dyes are more susceptible to fading or bleaching caused by the sun's UV rays.