Coal-based solid waste stone plastic composite master batch and preparation method thereof

By developing a method for preparing coal-based solid waste stone-plastic composite masterbatch, boric acid compounds and lignin sulfonate are used to modify coal-based solid waste particles. Combined with acid anhydride compounds and epoxy chain extenders, a multi-layer synergistic network structure is formed, which solves the problems of decreased toughness and processing instability caused by high coal-based solid waste content, and improves the toughness and processing stability of the material.

CN122502809APending Publication Date: 2026-08-04SHENZHEN HENGDEYUAN ENVIRONMENTAL PROTECTION NEW MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202610862981.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-15
Publication Date
2026-08-04

AI Technical Summary

Technical Problem

The high content of coal-based solid waste in existing coal-based solid waste-plastic composite masterbatches leads to a decrease in the toughness of the composite masterbatch, and the material's impact resistance is reduced in low-temperature environments, making it prone to brittle fracture, which affects the service life and structural stability of the products.

Method used

By crushing and calcining coal-based solid waste, the surface of coal-based solid waste particles is modified using boric acid compounds and lignin sulfonates. Combined with acid anhydride compounds and epoxy chain extenders, a multi-layer synergistic network structure is formed, which improves interfacial compatibility and interfacial crosslinking, and improves the toughness and processing stability of the material.

Benefits of technology

It significantly improves the impact toughness, crack resistance and long-term stability of composite masterbatch, solves the problems of increased material brittleness and processing instability under high filling conditions, and enhances the interfacial bonding strength and melt flow properties of the material.

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Abstract

The application belongs to the field of plastic materials, and discloses a coal-based solid waste stone-plastic composite master batch and a preparation method thereof. The preparation method comprises the following steps: after coal-based solid waste is crushed and calcined and activated, the coal-based solid waste is added into a modified solution containing a boric acid compound and a lignin sulfonate, and heated and stirred to react, so that modified particles are obtained; polyolefin and an acid anhydride compound are mixed and heated to react, so that acid anhydride modified polyolefin is obtained, then an epoxy-based chain extender is added, and heating reaction is continued, so that modified molten liquid is obtained; the modified particles are added into the modified molten liquid for melting and stirring, so that mixed slurry is obtained, then an amine crosslinking agent and an epoxy borate are added, and heating, stirring, extrusion, cooling and granulation are performed, so that the coal-based solid waste stone-plastic composite master batch is obtained. The coal-based solid waste stone-plastic composite master batch prepared by the above method can maintain good toughness while maintaining a high content of coal-based solid waste.
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