High-CTI brominated flame-retardant reinforced polyamide composite material and preparation method and application thereof

Abstract

The invention discloses a high-CTI brominated flame-retardant reinforced polyamide composite material and a preparation method and application thereof. The composite material comprises 36-49% of thermoplastic polyamide resin, 16-22% of a brominated flame retardant, 3-5% of antimony trioxide, 3-5% of a flame-retardant supplement, 20-40% of a reinforcing material, 0.15-0.25% of a main antioxidant and 0.25-0.35% of a light absorber. The flame-retardant supplement lamellar mineral is added into the thermoplastic polyamide resin so that the effect of supplementing stable flame retardance is achieved, and the glowing filament performance of the composite material is improved; a reinforcing material, namely flat special-shaped glass fiber, is added, so that the fluidity is effectively improved, and the surface and buckling deformation of the product are improved; the reinforcing material flat glass fiber and the flame-retardant supplement lamellar mineral cooperate with each other, formation of branched carbon on the surface of the material in the discharge process is hindered, the CTI value of the material is increased, and safety guarantee is provided for use of the flame-retardant polyamide product in high-requirement electronics and electricity.

Description

technical field [0001] The invention belongs to the technical field of polyamide resin modification, and in particular relates to a high-CTI brominated flame-retardant reinforced polyamide composite material, a preparation method and application thereof. Background technique [0002] Polyamide resin has excellent mechanical and physical properties, and is widely used in machinery manufacturing, electric tools, electronic appliances, transportation and other fields. After being modified by flame retardant enhancement, the reinforced flame retardant polyamide composite material has excellent flame retardant performance and temperature resistance performance, and is often used as an insulating structural part in the field of electronics and electricity. In the field of electrical and electronic applications, the electrical performance requirements of insulating materials are high, especially the relative tracking index (CTI) of the material. A high CTI value means that a relati...

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Problems solved by technology

These two technical means can be classified as halogen-free flame retardants compounded with brominated flame retardants to improve the CTI value of the material. Considering the poor synergistic effect of brominated flame retardants and halogen-free flame retardants, the overall flame retardant dosage will increase

Although the CTI value of the material can be improved, on the one hand, it will increase the cost, and on the other hand, it cannot eliminate the disadvantages of poor thermal stability, easy moisture absorption, and easy precipitation of halogen-free flame retardants.

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