Which Additives Should Be Used in Dye Production And Processing?

Dye production is generally divided into three steps:

1. Synthesis of dye intermediates

2.dye intermediate by chemical reaction to produce dye powder

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

First. Dispersant:

Should be the most used additives in the commercialization of dyes, the general varieties are:

1, sodium lignosulfonate: Sodium lignosulfonate is an anionic surfactant. It has a strong dispersion ability and is suitable for dispersing solids in water medium.

2. Dispersant NNO: chemical name is sodium methylene dinaphthalene sulfonate, sodium methylene dinaphthalene sulfonate. Dispersant NNO is mainly used as dispersant in disperse dyes, VAT dyes, reactive dyes, acid dyes and leather dyes, with excellent grinding efficiency, once-solubility and dispersion.

3, Dispersant MF: methylnaphthalene sulfonate formaldehyde condensation, mainly used for disperse dyes, VAT dyes grinding processing agent and dispersant, dispersion performance is better than dispersant NNO.

4, dispersant CNF: α-benzyl methyl naphthalene sulfonate formaldehyde condensation, the main chemical group is divided into benzyl naphthalene sulfonate formaldehyde condensation, high temperature resistance is the best of the three kinds of naphthalene sulfonate formaldehyde condensation.

5, dispersant SS: alkyl benzene sulfonate formaldehyde condensation, the main chemical group is divided into mixed cresol, naphthalene sulfonic acid and formaldehyde condensation, mainly used for grinding disperse dyes.

Twice. Filler:

In order to adjust the strength of the dye to the standard, a neutral filler is added:

1, sodium sulfate, that is, sodium powder, basically all kinds of dyes will be added; It has the advantage of low cost.

2, dextrin, mainly used in cationic dyes.

Third, dustproof agent:

In order to prevent dye dust from flying, dustproof agents are usually added, generally:

1, mineral oil emulsion

2, alkyl stearate ester

The above additives are usually added to powder or particle dyes, if it is a liquid dye, it will also add thickening agents (viscosity regulators), anti-mildew agents, chelating dispersants, non-volatile solvents, polyethylene glycol compounds, etc.

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