Anti-aging material for rail transit cable and preparation method of anti-aging material

By introducing naphthyl and nanoTiO2 into the polyurethane of rail transit cable material and acting in concert with expanded graphite, the problem of aging in complex environments is solved, and excellent UV resistance, heat resistance and flame retardant properties are achieved, and service life is extended.

CN119724713AActive Publication Date: 2025-03-28ZHEJIANG HUAJIADA CABLE GROUP CO LTD
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Patent Information

Application Number
CN202411910323.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-24
Publication Date
2025-03-28
Estimated Expiration
2044-12-24

AI Technical Summary

Technical Problem

Existing rail transit cable materials are prone to aging in complex environments such as high temperature, high humidity, ultraviolet rays and chemical corrosion, resulting in reduced performance, short service life, and poor UV resistance and heat resistance aging.

Method used

By introducing naphthyl groups with good heat resistance and nanoTiO2 with good UV resistance into the chain extender of polyurethane, chemical grafting is used to make it stable in the polyurethane matrix for a long time, and it works in concert with expanded graphite to prevent migration and exudation.

Benefits of technology

It significantly improves the UV aging resistance and heat aging resistance of rail transit cable materials, enhances mechanical properties, extends service life, and improves flame retardant performance.

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Abstract

The invention relates to the technical field of cable materials, and discloses an anti-aging material for rail transit cables and a preparation method thereof.The anti-aging material is prepared from, by weight, 100 parts of polyurethane, 20-30 parts of heat-resistant anti-aging polyurethane, 12-15 parts of expanded graphite and 0.2-0.5 part of antioxidant through kneading, thin-passing and calendaring molding; wherein the heat-resistant anti-aging polyurethane is synthesized by taking prepared glycol naphthalene organic silicon modified TiO2 as a chain extender and has the heat aging resistance of a naphthalene ring and the ultraviolet aging resistance of TiO2, and meanwhile, the heat-resistant anti-aging polyurethane is endowed with excellent flame-retardant and smoke-suppressing performance by organosiloxane and expanded graphite; the anti-aging polyurethane cable material has the advantages that the anti-aging polyurethane cable material can stably exist in a polyurethane matrix for a long time in a chemical grafting mode, migration and seepage phenomena are not prone to occurring, the long-term anti-aging effect of the polyurethane cable material is guaranteed, and the preparation method is simple in technological process and easy for large-scale industrial production.
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