A method for mixing pigments, a mixed pigment, a color paste containing the same, and applications thereof

CN122168050APending Publication Date: 2026-06-09SUZHOU SUNMUN TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUZHOU SUNMUN TECH CO LTD
Filing Date
2024-12-06
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing pyrrolopyrrole pigments are prone to agglomeration and crystallization during dispersion, resulting in high preparation costs and unsuitability for displays. Furthermore, traditional methods use large amounts of salt and solvents, causing environmental pollution.

Method used

Pyrrolopyrrole dione pigments are mixed with a first dispersant and solvent at low temperature. The solvation chain of the first dispersant and the pigment anchoring site are used to prepare the color paste in combination with a second dispersant and binder, avoiding the use of salt and solvent, thereby improving dispersion stability and contrast.

Benefits of technology

A low-cost and environmentally friendly pigment dispersion method has been achieved. The prepared pigment paste has good dispersion stability and high contrast, and the photocurable film has heat resistance and light resistance.

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Abstract

The application discloses a pigment mixing method, a mixed pigment, a color paste containing the same and application. The pigment mixing method is as follows: 100 parts by mass of a pyrrolopyrrone diketone pigment, 10-30 parts by mass of a first solvent, 5-20 parts by mass of a first dispersant and 10-30 parts by mass of a PY150 pigment are mixed below 45 DEG C to obtain a mixed pigment. The chemical structural formula of the first dispersant is shown in formula (I): wherein R1 and R2 are independently halogen, alkyl, an aromatic ring, a substituted aromatic ring, a condensed ring or a substituted condensed ring, R3 is an aromatic ring, a condensed ring or a heterocyclic ring, R4 is an alkylene group with 3-10 carbon atoms, R5 is hydrogen or methyl, m is an integer of 0-3, n is an integer of 1-18, and k is an integer of 1-20. The pigment mixing method has the advantages of simple operation and low cost, and the color paste configured by the pigment prepared from the pigment mixing method has good dispersion stability and contrast.
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Citation Information

Patent Citations

  • Easily distributable pigment compositions

    EP1277808A2

  • Process for the preparation of pigments having improved colouristic properties

    EP1411091A1

  • Diketopyrrolopyrrole pigment solid solution composition, and coloring composition using diketopyrrolopyrrole pigment solid solution composition

    JP2019112534A

  • Pigments having improved colouristic properties and process for their preparation

    US20040250732A1