Low-smoke halogen-free silicone functional master batch applied to flexible special cable and preparation method thereof

By combining modified MQ silicone resin composite with components such as ethylene-vinyl acetate copolymer, the problem of decreased bending resistance of low-smoke halogen-free flexible cable material when improving smoke resistance was solved, and stability and continuity were achieved in cable chain, winding and dynamic service scenarios.

CN122810595APending Publication Date: 2026-09-25TONGLE CABLE (JIANGSU) CO LTD
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Patent Information

Application Number
CN202611034127.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-07-13
Publication Date
2026-09-25

AI Technical Summary

Technical Problem

Existing low-smoke halogen-free flexible cable materials tend to sacrifice resistance to repeated bending when improving smoke resistance, leading to problems such as whitening and cracking of the sheath.

Method used

A modified MQ silicone resin composite is used, in which hydroxyl MQ silicone resin treated with silane hydrogen bonding reacts with single-end vinyl and α,ω-divinyl polydimethylsiloxane in a segmented manner, and layered magnesium aluminum double hydroxide is added to form stable siloxane segments, thereby improving the compatibility with polyolefin carriers and the dispersibility of halogen-free smoke-blocking fillers.

Benefits of technology

While maintaining low-smoke and halogen-free performance, it improves the cable's durability under repeated bending and processing stability, making it suitable for cable chain, winding, and dynamic service scenarios.

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Abstract

The application relates to the technical field of cable material preparation, in particular to a low-smoke halogen-free organic silicon functional master batch applied to flexible special cables and a preparation method thereof. The low-smoke halogen-free organic silicon functional master batch is prepared from modified MQ silicon resin composite, ethylene-vinyl acetate copolymer, ethylene-octene copolymer elastomer, maleic anhydride grafted ethylene-octene copolymer elastomer, an antioxidant and zinc stearate as raw materials; first, 1,1,3,3-tetramethyl disilazane is used to introduce a silicon hydrogen group into a hydroxyl MQ silicon resin, and hexamethyl disilazane is used for end capping; then, first-stage silicon hydrogen addition of single-end vinyl polydimethylsiloxane, dispersion of layered magnesium-aluminum double hydroxide and second-stage silicon hydrogen addition of alpha, omega-di-vinyl polydimethylsiloxane are sequentially carried out, and finally, melt granulation is carried out with a polyolefin carrier; the application is favorable for reducing migration of the organic silicon component and aggregation of inorganic lamellas, and improving low-smoke property and repeated bending durability of the sheath material.
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