Introduction To Commercial Dyes And Their Characteristics

Commercial dyes are a class of chemicals used to impart color to materials and are used in a wide variety of industrial and consumer products. Unlike pigments, dyes are usually molecular structures that are soluble in water or other solvents and can penetrate into the material to achieve a long-lasting coloring effect.

Dye production steps

Commercial dyes are commodities whose original dyes have been processed and can meet dyeing (coloring) requirements.

1. Synthesis of dye intermediates

2. Chemical reaction of dye intermediates to produce raw dye powder

3. Raw dye powder is processed to produce commercial dyes, which is the commercialization of dyes.

Commercial dyes are not just raw dye powder, other ingredients are added when the dye is commercialized.

Dispersant

The most commonly used additives for dye commercialization.

1. Sodium lignosulfonate: Sodium lignosulfonate is an anionic surfactant. It has strong dispersing ability and is suitable for dispersing solids in water media.

2. Dispersant NNO: chemical names include sodium methylene bis-naphthalene sulfonate and sodium methylene bis-naphthalene sulfonate. Dispersant NNO is mainly used as a dispersant in disperse dyes, vat dyes, reactive dyes, acid dyes and leather dyes. It has excellent grinding efficiency, solubility and dispersibility.

3. Dispersant MF: Methyl naphthalene sulfonate formaldehyde condensate is mainly used as a processing agent and dispersant when grinding disperse dyes and vat dyes. Its dispersing performance is better than that of dispersant NNO.

4. Dispersant CNF: α-benzylnaphthalene sulfonic acid formaldehyde condensate. The main chemical component is benzylnaphthalene sulfonic acid formaldehyde condensate. Its high temperature resistance is the best among the three naphthalene sulfonic acid formaldehyde condensates.

5. Dispersant SS: alkyl benzene sulfonic acid formaldehyde condensate. The main chemical component is the condensate of mixed cresol, naphthalene sulfonic acid and formaldehyde. It is mainly used for grinding disperse dyes.

Filler

In order to adjust the dye to reach the standard strength, add neutral fillers

1. Sodium sulfate, also known as Yuanming powder, is added to basically all kinds of dyes; it has the advantage of low cost.

2. Dextrin, mainly used for cationic dyes.

Dust repellent

In order to prevent dye dust from flying,

1. Mineral oil emulsion

2. Alkyl stearate

The above additives are usually added to powder or granular dyes. If it is a liquid dye, thickeners (viscosity regulators), antifungal agents, chelating dispersants, non-volatile solvents, polyethylene glycol compounds, etc. will also be added.

In general, commercial dyes play an irreplaceable role in multiple industries due to their wide applicability and excellent coloring properties. With the advancement of technology and the improvement of environmental protection requirements, the research and development and application of dyes are also constantly innovating and developing in a more efficient and environmentally friendly direction.