Antistatic polymer composition

Abstract

The invention discloses an antistatic polymer composition, comprising: 50-94.2% by weight of at least one thermoplastic polyester resin with a glass transition temperature above 30°C, and 0.8-15% by weight of at least one thermoplastic polyester resin with a glass transition temperature of 25°C The following copolyester polymers containing ether segments, 5-35% by weight of conductive fillers, are obtained by twin-screw extrusion molding and pelletizing after blending and melting raw materials, and are used to prepare plastic products such as antistatic handles, containers or connections Electrical / electronic parts such as appliances or automotive parts. The present invention selects large-sized conductive materials such as carbon fibers to maintain the continuity of the conductive path, the stability of the conductive performance of the product, and a good reinforcement effect. The copolyester polymer containing ether segments has good compatibility with thermoplastic polyester materials, and the processing The window is wide, and the negative impact on mechanical properties is small, and the composition has low resistivity, high mechanical properties, good formability and good processing environment.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polymer composition with improved antistatic properties. Background technique [0002] Thermoplastic polymers such as polyester materials have excellent mechanical properties, moldability, and chemical resistance, and thus have been used in automotive components, electrical / electronic components, and many other applications. In some applications, it is desirable that these polymers are also antistatic or even conductive, which can generally be achieved by incorporating conductive additives such as carbon fibers, graphite, carbon black, etc. However, the price of these conductive additives is very high, and the toughness (such as elongation at break, etc.) of the material will be seriously affected when the addition amount is high. Therefore, there is an ongoing engineering need to develop more efficient low-resistance compositions for low-cost, high-perfo...

AI Technical Summary

Problems solved by technology

However, due to the high price of carbon nanotubes and the need to make masterbatches to achieve pre-dispersion, the overall cost is still very high

Another Chinese patent CN102532823B discloses a technical solution of adding multi-walled carbon nanotubes and epoxy elastomers to PBT to obtain antistatic materials. Can not significantly reduce the system resistance

However, the Canadian patent CA1293367C has to use continuous carbon fiber in order to achieve high conductivity, resulting in very limited processing conditions, low yield rate and practicability

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