A dispersing agent for rubber, a method for preparing the same, and use thereof

By preparing a rubber dispersant containing stearic acid, microcrystalline wax, monoglyceride fatty acid ester and modified sodium lignosulfonate, the problem of filler agglomeration and weak interfacial bonding in the rubber dispersant during the mixing process was solved by utilizing the synergistic effect of montmorillonite sheets and modified sodium lignosulfonate. This achieved uniform dispersion of fillers and interfacial strengthening, thereby improving the overall performance of rubber products.

CN122344352APending Publication Date: 2026-07-07WUHAN JINGHE CHEM +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN JINGHE CHEM
Filing Date
2026-06-09
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing rubber dispersants are difficult to achieve uniform dispersion of inorganic fillers during rubber compounding, and are prone to agglomeration, which leads to increased Mooney viscosity of the rubber compound, poor processing fluidity, weak interfacial bonding between fillers and rubber, and decreased performance of vulcanized rubber.

Method used

The components, measured by weight, include stearic acid, microcrystalline wax, monoglyceride fatty acid ester, and modified sodium lignosulfonate. By preparing a dispersing agent, using montmorillonite sheets as a framework, and combining the steric hindrance effect of nanosheets with the hydrogen bonding of modified sodium lignosulfonate, a synergistic system is formed to improve the uniformity of filler dispersion and the interfacial bonding strength.

Benefits of technology

It significantly improves the uniformity of filler dispersion in the rubber matrix, reduces the Mooney viscosity of the rubber compound, improves the flowability of the compounding process, enhances the interfacial bonding strength between the filler and the rubber, and improves the overall performance of the vulcanizate.

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Abstract

The present application relates to the technical field of rubber processing aids, and particularly relates to a dispersant for rubber, a preparation method and application thereof.The dispersant for rubber comprises the following raw materials in parts by weight: 20-30 parts of stearic acid, 5-10 parts of microcrystalline wax, 1-5 parts of monoglyceride fatty acid ester, 2-7 parts of dispersing aid, and 1-5 parts of modified sodium lignosulfonate.The dispersant for rubber can improve the wetting and coating capacity of fillers, reduce the Mooney viscosity of rubber compounds, and improve the flowability of mixing and processing.In addition, the dispersant for rubber can improve the dispersion uniformity of fillers in the rubber system, and improve the interfacial bonding strength between fillers and rubber.Meanwhile, the dispersant for rubber can effectively avoid the migration and blooming of small molecule additives, and improve the appearance stability of rubber products.
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