A nanocomposite pigment based on allophane and a method for preparing the same

By solid-phase grinding and high-temperature treatment of hydrated alumina and organic dyes, acid- and alkali-resistant and light-resistant nanocomposite pigments were prepared, solving the problems of narrow color gamut of inorganic pigments and poor stability of organic pigments, and realizing the preparation of high-performance and environmentally friendly pigments.

CN118703058BActive Publication Date: 2026-07-10GUANGDONG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG UNIV OF TECH
Filing Date
2024-06-12
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing inorganic pigments have a narrow chromatographic range, while organic pigments have poor stability. Traditional preparation methods involve numerous steps and cause serious pollution, making it difficult to prepare high-performance and stable nanocomposite pigments.

Method used

Acid- and alkali-resistant, light-resistant nanocomposite pigment was prepared by mixing hydrous aluminosilicate with organic dyes through solid-phase grinding and then treating it at high temperature, thus avoiding the need for a protective layer.

Benefits of technology

The prepared pigments exhibit excellent chemical and light stability, a wide chromatographic range, and a simple, pollution-free preparation process with low cost, conforming to green industrial production.

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Abstract

The application discloses a kind of nanometer composite pigments based on allophane and a preparation method thereof.The nanometer composite pigments have excellent dispersibility and stability, can resist the erosion of acid, alkali and organic solvent, and have excellent chemical stability and light stability.The nanometer composite pigments are obtained by uniformly mixing allophane and organic dye to obtain a mineral-dye mixture, and then heat treating the mixture.The preparation process of the pigments is simple, the stability of the products is outstanding, the cost is low, and the environment is friendly.
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