A kind of modified EVA foaming rubber particle and preparation method thereof

By adding nanocomposite powder and composite polysiloxane to the EVA foam particles, combining the nickel metal organic framework and end-hydroxy polydimethylsiloxane, the problem of insufficient flame retardancy and resilience of the EVA foam particles is solved, and the mechanical properties and flame retardancy of the material are improved.

CN119219966BActive Publication Date: 2025-03-25TAIZHOU SHANJIANG RUBBER & PLASTIC CO LTD
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Patent Information

Application Number
CN202411773978.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-05
Publication Date
2025-03-25
Estimated Expiration
2044-12-05

AI Technical Summary

Technical Problem

EVA foam particles themselves do not have flame retardancy. The composite flame retardant will affect its physical properties while improving the flame retardant effect, especially in the field of foamed shoes, resulting in an increase in density and a decrease in rebound.

Method used

By adding composite polysiloxane containing nanocomposite powder during the preparation process of EVA foam particles, combining nanomagnesium carbonate powder and nickel metal organic framework structures to form a core-shell structure with soft inside and rigid outside, improving the mechanical properties of the material, and enhancing viscoelasticity through end-hydroxy polydimethylsiloxane and improving flame retardant properties.

Benefits of technology

The flame retardant effect and elasticity of EVA foamed products are achieved simultaneously, and the mechanical properties and flame retardant properties of the material are improved. It is suitable for foamed shoe materials.

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Abstract

The invention discloses a modified EVA foamed rubber particle and a preparation method thereof, belonging to the technical field of EVA foamed rubber particles. EVA elastomer, TPEE polyester elastomer, EVA-g-MAH elastomer, composite polysiloxane, modified graphene / silver composite powder and silane coupling agent KH550 are mixed and kneaded in proportion, extruded and pelletized to obtain the modified EVA foamed rubber particle; the composite polysiloxane is helpful to simultaneously improve the resilience and flame retardant effect of the EVA foamed product; the nano-composite powder particles are a core-shell structure with inner softness and outer rigidity, which is helpful to propagate deflection cracks and twist cracks and disperse stress; the Si-O-Si bond formed by the nano-composite powder and the terminal hydroxyl polydimethylsiloxane can enhance the material; the nickel metal organic skeleton releases CO2 gas when heated during the combustion process, so that the nano-composite powder particles are expanded, and the generation of a heat-insulating carbon layer is promoted, thereby enhancing the flame retardant performance of the material.
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