Modified castor oil acid benzene ma resin dispersant, and preparation method and application thereof

By introducing castor oil acid side chains and active hydroxyl groups onto the benzene resin molecular chain, a highly branched comb-like structure is formed, which solves the problem of poor dispersion stability of benzene resin dispersant in polyurethane resin-based coatings or adhesives, and achieves stable dispersion of inorganic pigment particles and improved material properties.

CN122234279BActive Publication Date: 2026-07-24YANTAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YANTAI UNIV
Filing Date
2026-05-20
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing benzene-based resin dispersants have poor dispersion stability in polyurethane resin-based coatings or adhesives, which leads to easy flocculation and coarsening of inorganic pigment particles.

Method used

By introducing ricinoleic acid side chains and active hydroxyl groups into the benzyl oleate resin molecular chain, a highly branched comb-like molecular structure is formed, which increases anchoring points and steric hindrance, thereby improving flow permeability and dispersion stability.

Benefits of technology

Modified benzene-based resin dispersants form a strong anchor on the surface of inorganic pigment particles, improving dispersion efficiency and stability, preventing particle flocculation, and enhancing the fluidity and adhesion properties of the material.

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Abstract

The present application relates to the technical field of dispersant, in particular to a modified castor oil acid phenolic resin dispersant, a preparation method and application thereof.The preparation method comprises the following steps: S1, under the condition of room temperature and protective gas, stirring and adding phenolic resin powder and castor oil acid into a solvent to obtain a reaction solution; S2, under the condition of stirring, continuously adding a catalyst to react, removing the solvent after the reaction is completed, and vacuum drying to obtain castor oil acid modified phenolic resin; S3, mixing the castor oil acid modified phenolic resin, a hydroxyl-containing mercapto compound, an initiator and 1,4-dioxane, removing the solvent under the condition of high-purity nitrogen atmosphere and stirring, and vacuum drying to obtain the modified castor oil acid phenolic resin dispersant.The present application introduces castor oil acid side chains and active hydroxyl groups on the molecular chain of phenolic resin successively, and obtains a high-branched comb molecule containing multiple anchoring points, large steric hindrance and reactivity, which gives the dispersant good flow permeability and dispersion stability.
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