PBT composite material, preparation method and application thereof

By adjusting the proportions of brominated flame retardants, antimony synergists, and aluminum diethylphosphinate, PBT composite materials were prepared, solving the problems of flame retardancy, electrical insulation performance, and surface defects in existing technologies. This enabled the application of high CTI and V0 flame-retardant PBT composite materials in electronic and electrical components.

CN122213633APending Publication Date: 2026-06-16KINGFA SCI & TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KINGFA SCI & TECH CO LTD
Filing Date
2026-04-23
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Existing technologies struggle to improve the leakage resistance of brominated flame-retardant reinforced PBT materials while simultaneously maintaining the material's flame retardancy (V0), high electrical insulation properties (high CTI), and defect-free surface.

⚗Method used

PBT composite materials were prepared by adjusting the proportions of brominated flame retardants, antimony synergists, and aluminum diethylphosphinate, combined with a twin-screw extruder, to optimize the material composition and achieve V0 flame retardancy, high CTI, and a defect-free surface.

🎯Benefits of technology

It achieves the effect of PBT composite material with high CTI (≥250V) and flame retardancy (V0) while having a defect-free surface, and is suitable for electronic and electrical components.

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Abstract

The application discloses a PBT composite material and a preparation method and application thereof, and comprises the following components in parts by weight: PBT 50-60 parts; glass fiber 0-30 parts; and a compounded flame retardant 14-26 parts; the compounded flame retardant comprises a high-molecular bromine flame retardant, aluminum diethyl phosphinate and a flame-retardant synergist; wherein the weight ratio of the high-molecular bromine flame retardant, aluminum diethyl phosphinate and antimony trioxide ranges from 1: (0.5-2): (6-14). The application can realize V-0 flame retardation, obviously improve CTI performance, and significantly improve the peeling problem of the surface of the high-CTI bromine flame-retardant PBT material by using the specific proportion of the flame retardant.
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