High CTI brominated flame-retardant reinforced PBT material and preparation method thereof

Abstract

The invention provides a high CTI brominated flame-retardant reinforced PBT material and a preparation method thereof. The brominated flame-retardant reinforced PBT material comprises the following ingredients: 35-65 wt% of PBT resin, 6-20 wt% of brominated fire retardant, 2-7 wt% of fire-resisting synergistic agent, 1-10 wt% of nitrogen containing compound, 1-5 wt% of strontium compound, 15-40 wt% of glass fiber, 0.1-1 wt% of antioxidant and 0.1-1 wt% of lubricant. The brominated flame-retardant reinforced PBT material disclosed in the invention has high CTI value, high flame resistance, excellent mechanical property, simultaneously has superior characteristics of no precipitation and high GWIT value.

Description

technical field [0001] The invention relates to a brominated flame-retardant reinforced PBT material with a high CTI value and a preparation method thereof, which can be used for manufacturing electronic and electrical equipment and belongs to the technical field of polymer materials. Background technique [0002] As one of the five major engineering plastics, polybutylene terephthalate (PBT) has excellent mechanical properties, weather resistance, heat resistance, chemical solvent resistance, fatigue resistance and creep resistance, fast crystallization and easy molding , good dimensional stability. Modified PBT products are widely used in many fields such as computer fans, energy-saving lamps, auto parts, connectors and connectors, relay industries, motor brackets and coil skeletons, beauty and hairdressing products, copiers and printers. [0003] In some electronic and electrical fields, high tracking resistance has become a hot spot and difficulty in the research and de...

AI Technical Summary

Problems solved by technology

The problem is that the amount of filler added in the above materials is large, the mechanical properties are poor, and the application of materials is limited

[0006] US 4636544 discloses that TiO2 can improve the CTI value of brominated flame-retardant reinforced PBT, but the problem is that the mechanical properties of the above-mentioned materials are relatively poor

[0007] US 3937757 discloses that the introduction of polyolefin materials can increase the CTI value of brominated flame-retardant reinforced PBT, but the problem is that the heat distortion temperature of the above materials is greatly reduced, and the room for improving the CTI value is limited

[0008] US 4000109, CN 101885904A discloses that zinc borate can improve the CTI value of brominated flame retardant reinforced PBT, the existing problem is that zinc borate is composed of 2ZnO·3B 2 o 3 ·xH 2 O composition, the purity is difficult to be absolutely free of boron oxide, which may be restricted by European regulations

The problem is that the nitrogen and phosphorus flame retardants are easy to precipitate

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