Intercalated hydrotalcite / phosphate esterification modified castor oil composite fatting agent and preparation method thereof

By modifying the fatliquoring agent with sodium phytate-intercalated hydrotalcite and castor oil through phosphoric acid esterification, the problem of poor dispersibility and compatibility of flame retardant components was solved, and high-performance flame retardant leather with good softness and thermal stability was achieved.

CN122146949APending Publication Date: 2026-06-05SHAANXI UNIV OF SCI & TECH
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Patent Information

Application Number
CN202610582256.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-29
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

The existing fatliquoring agents have poor dispersibility and compatibility of flame retardant components, resulting in low flame retardant efficiency and making it difficult to meet the application requirements of high-performance flame retardant leather.

Method used

Sodium phytate intercalated hydrotalcite and castor oil were used for phosphoric acid esterification modification. By controlling the interlayer structure, in-situ composite of intercalated hydrotalcite and phosphoric acid esterified castor oil was achieved, thereby improving its dispersion stability and compatibility.

Benefits of technology

This forms a structurally stable composite system that improves the flame retardancy and softness of leather, while reducing the risk of combustion and exhibiting good thermal stability and charring ability.

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Abstract

The invention discloses a preparation method of an intercalated hydrotalcite / phosphate esterification modified castor oil composite fatting agent, which is specifically implemented according to the following steps: step 1, preparing Ph-LDH; and step 2, preparing the intercalated hydrotalcite / phosphate esterification modified castor oil composite fatting agent. The invention further discloses the intercalated hydrotalcite / phosphate esterification modified castor oil composite fatting agent and application. According to the invention, sodium phytate is adopted to intercalate hydrotalcite, so that the interlayer spacing is enlarged, the interlayer electrostatic interaction is weakened, the lamellar agglomeration tendency is reduced, and the dispersion stability of LDH in castor oil is improved; meanwhile, castor oil is subjected to phosphoric acid esterification modification, phosphorus-containing groups are introduced into molecules of the castor oil, so that the phosphoric acid esterification modified castor oil and the sodium phytate intercalated hydrotalcite can be uniformly combined, and a composite system with a stable structure is formed; the intercalated hydrotalcite / phosphate esterification modified castor oil composite fatting agent disclosed by the invention also has dual functions of softness and flame retardance.
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