Preparation method of anti-corrosion MPP power pipe

CN122917475APending Publication Date: 2026-10-16HEBEI JIUHE RUBBER & PLASTIC PROD CO LTD
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Patent Information

Application Number
CN202611345414.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-09-01
Publication Date
2026-10-16

AI Technical Summary

Technical Problem

若单纯提高无机填料用量，容易导致聚丙烯基体内部出现团聚缺陷，使管材冲击性能下降，并增加熔体黏度和挤出不稳定风险；若采用高价纳米碳材料、氟硅类树脂或外覆防腐涂层，又会带来原料成本升高、工艺复杂、涂层附着不稳定和工业化推广难度较大的问题

Benefits of technology

[0025] (1) This invention uses magnesium aluminum phytic acid silane montmorillonite barrier powder to modify anti-corrosion modified polypropylene power pipes. Sodium-based bentonite is dispersed with sodium hexametaphosphate and treated with sodium hydroxide aqueous solution to form activated montmorillonite slurry. Then, it reacts with magnesium aluminum phytic acid complex solution formed by phytic acid aqueous solution, magnesium chloride hexahydrate, aluminum sulfate octahydrate and dilute ammonia water to obtain magnesium aluminum phytic acid coated montmorillonite wet material. The magnesium aluminum phytic acid coating structure can improve the interfacial stability of the montmorillonite sheet surface, reduce the penetration of acidic media, alkaline media, salt media and water along the internal interface of the pipe wall, so that the anti-corrosion modified polypropylene power pipe can maintain a relatively stable pipe wall structure in humid, saline and acid-base changing environments.

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Abstract

The application belongs to the technical field of high polymer composite materials for power cable protection pipes, and particularly relates to a preparation method of a corrosion-resistant MPP power pipe. Block copolymerized polypropylene, ethylene octene copolymer elastomer, maleic anhydride grafted polypropylene compatibilizer, talcum powder, magnesium-aluminum phytic acid silane montmorillonite barrier powder, polypropylene carrier carbon black master batch, antioxidant and polyethylene wax are mixed, and then subjected to melt blending granulation, pipe extrusion molding, vacuum sizing, cooling traction, heat preservation and post-treatment to obtain a corrosion-resistant modified polypropylene power pipe. The magnesium-aluminum phytic acid silane montmorillonite barrier powder is prepared from sodium-based bentonite through dispersion activation, magnesium-aluminum phytic acid complex coating, silane hydrophobic modification and maleic anhydride grafted polypropylene wax coating, and can improve the barrier property, corrosion resistance and mechanical stability of the pipe to acid, alkali, salt and a wet heat environment.
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