Лако-красочные материалы — производство

Diazo components for the production of azo dyes can be divided into the follow­ing groups of aromatic amines:

Aniline and Substituted Anilines. Methyl, chloro, nitro, methoxyl, ethoxyl, phe — noxyl, hydroxyl, carboxyl, carbalkoxyl, carbonamide, and sulfonic acid groups are primarily used as substituents.

Examples: Toluidines, nitroanilines, amino benzoyl amides, and the sulfonic acids thereof.

Naphthylamines and Naphthylaminesulfonic Acids. The compounds shown in Figure 2.2, known by their common names, are examples of naphthylamine­sulfonic acids.

Diamines H2N-A — NH2. The diamines can be divided into different groups:

a) A = phenylene or naphthylene group, also substituted, e. g., by methyl, chloro, nitro, methoxy, or sulfonic acid groups (e. g., 9-12)

b) A = diphenyl group, substituted mainly by chlorine, carboxylic acid, or sul­fonic acid groups (e. g., 13-16).

whereby the aromatic rings can also be substituted by methyl, chlorine, methoxy, carboxylic acid, or sulfonic acid groups; B = oxygen, sulfur, —NH—, —S02—, — N=N—, — CH=CH-, — NHCO-, — NH-CO-HN — (e. g., 17-19).

d) Heterocyclic amines and diamines (e. g., 20-25)