Glass microsphere-modified PBT (polybutylene terephthalate) material and preparation method thereof

Abstract

The invention discloses a glass microsphere-modified PBT (polybutylene terephthalate) material. The glass microsphere-modified PBT (polybutylene terephthalate) material is prepared from the followingraw materials in parts by weight: 60 to 80 parts of PBT, 15 to 20 parts of polytetrafluoroethylene, 15 to 20 parts of polyvinyl alcohol microspheres, 5 to 8 parts of dimethylethanolamine, 5 to 10 parts of gelatin, 6 to 12 parts of glass microsphere master batch, 1 to 3 parts of alumina, and 1 to 3 parts of antioxidant 245. The glass microsphere-modified PBT material has the advantages that by introducing the coated curing agent, the content of functional groups which can react with epoxy resin in the material is increased; by adopting a microcapsule curing agent, the microcapsule can be brokento slowly release the curing agent under certain condition, and then the curing activity is completed, so that the purpose of controlling the curing process of material and epoxy resin sealant is realized, and the interface adhering property between the material and the epoxy resin is improved; the advantages of the hollow glass microsphere vacuum structure are fully played, and the density, dielectric constant and conductive coefficient of the PBT material are reduced.

Description

Background technique [0001] Polybutylene terephthalate (English name Polybutylene Terephthalate, referred to as PBT) is milky white translucent to opaque, crystalline thermoplastic polyester. It has excellent electrical properties, high heat resistance, toughness, fatigue resistance, self-lubrication, low coefficient of friction, weather resistance, low water absorption, and maintains various physical properties (including electrical properties) in a humid environment. Good, so it is widely used as engineering plastics in automobiles, electronic and electrical components. [0002] The engine ignition coil is the main component of the engine ignition system. Its function is to increase the low voltage of the car battery to a high voltage of 20kv to 40kv that can cause spark plug discharge. Therefore, in order to prevent the ignition coil from being electrically broken down under high voltage and improve the insulation strength of the ignition coil components, the method of pot...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN104610711B discloses a PBT material with good epoxy resin adhesion and its preparation method. Through the synergistic effect of each component, the material has excellent anti-aging performance, and the introduction of reactive functional groups with the ability to react with epoxy resin improves the interface adhesion with epoxy resin, but the viscosity of epoxy resin changes during use Rapid curing process is difficult to control, and rapid curing results in reduced encapsulation efficiency