Environment-friendly flame-retardant master batch for crosslinked polyethylene and preparation method thereof

By introducing an environmentally friendly flame-retardant system composed of aluminum diethylphosphinate and melamine polyphosphate into cross-linked polyethylene materials, and using a three-screw compounding extrusion process to prepare flame-retardant masterbatch, the flammability and environmental problems of cross-linked polyethylene are solved, achieving the effects of high-efficiency flame retardancy, low smoke, non-toxicity and good mechanical properties, which is suitable for wire and cable and other fields.

CN122587320APending Publication Date: 2026-08-18KAIBOT MATERIAL (ANHUI) CO LTD
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Patent Information

Application Number
CN202610784390.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-02
Publication Date
2026-08-18

AI Technical Summary

Technical Problem

Existing cross-linked polyethylene materials are flammable, melt and drip when burning, and release dense smoke. Furthermore, existing flame-retardant masterbatches have environmental problems or poor mechanical properties, making them difficult to apply in scenarios with high safety requirements.

Method used

An environmentally friendly flame retardant system composed of aluminum diethylphosphonate, melamine polyphosphate, modified magnesium hydroxide, sepiolite, and maleic anhydride-grafted polyethylene is used. Flame retardant masterbatch is prepared through processes such as three-screw compounding extrusion, grinding, and air-cooling pelletizing. Combined with organically modified montmorillonite and zinc borate as char-forming promoters, a highly efficient flame retardant network is constructed.

Benefits of technology

It achieves high flame retardancy with low additive dosage, with a limiting oxygen index of 29.6% to 31%, is non-toxic and smokeless, maintains good mechanical properties, and is suitable for wire and cable fields with high safety requirements.

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Abstract

The application discloses an environment-friendly flame-retardant master batch for crosslinked polyethylene and a preparation method thereof, and belongs to the technical field of high polymer flame-retardant materials. The flame-retardant master batch is prepared from LLDPE resin as a base material, an aluminum diethyl phosphinate, melamine polyphosphate and modified magnesium hydroxide to form a phosphorus-nitrogen-inorganic ternary synergistic flame-retardant system, the addition of sepiolite which is resistant to high temperature and flame-retardant, the modification of an interface by using a PE-g-MAH compatilizer, and the addition of compounded antioxidants, lubricants and anti-dripping agents, high-speed mixing, three-screw mixing, single-screw extrusion, surface grinding and cutting, magnetic selection and vacuum packaging. The flame-retardant master batch can make the crosslinked polyethylene material reach UL94V-0 grade with 10% of the addition amount, and has the characteristics of low smoke, environmental protection, low release, high mechanical property retention rate and the like, and is suitable for the field of electric wires and cables.
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