用于35kV及以下电缆的聚丙烯绝缘材料及制备方法
By using a combination of surface-hydroxylated nano-boron nitride and maleic anhydride-grafted hydrogenated styrene-butadiene-styrene block copolymer in high-voltage cable insulation materials and employing a "two-step" masterbatch pretreatment process, the problem of achieving both thermal conductivity and insulation properties in high-voltage cable insulation materials was solved. This process enabled uniform dispersion of nano-boron nitride in a polypropylene matrix, thereby improving the thermal conductivity and insulation performance of the material.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAOXIONGMAO WIRECABLE CO LTD
- Filing Date
- 2025-09-16
- Publication Date
- 2026-07-17
AI Technical Summary
Existing high-voltage cable insulation materials cannot simultaneously possess both high thermal conductivity and high insulation. Simple mechanical blending modification methods often lead to uneven dispersion, agglomeration, or poor interface of the filler, affecting the breakdown strength and thermal conductivity of the material.
Surface-hydroxylated boron nitride nanoparticles are used as the core functional filler, and maleic anhydride-grafted hydrogenated styrene-butadiene-styrene block copolymer is used as a compatibilizer. Through a unique "two-step" masterbatch pretreatment process, uniform dispersion of boron nitride nanoparticles is achieved in the polypropylene matrix. Combined with rare earth β-crystal nucleating agents, the microstructure of the material is improved.
This method achieves monolayer-level and uniform dispersion of nano-boron nitride in a polypropylene matrix at extremely low addition levels, constructing an efficient phonon transport channel, significantly improving the thermal conductivity and insulation properties of the composite material, avoiding electric field distortion, and balancing the material's excellent insulation performance with significantly enhanced thermal conductivity.
Smart Images
Figure CN121045680B_ABST