Glass bead modified PBT material and preparation method thereof

Abstract

The invention discloses a glass bead modified PBT (polybutyleneterephthalate) material. The material comprises the following raw materials in parts by weight: 60-80 parts of PBT, 15-20 parts of aluminium dihydrogen phosphate, 15-20 parts of borax, 5-8 parts of sodium potassium silicate, 5-10 parts of zinc oxide, 6-12 parts of hydrogenated castor oil, 1-3 parts of cryolite, and 1-3 parts of an anti-oxidant 245. A curing agent after coating is introduced in order to increase content of function group which has reaction capability with epoxy resin in the material, and at the same time, the microcapsule curing agent can break microcapsules at a certain condition for slow release in order to complete solidification behavior, so that the purpose that the casting glue solidification process between the material and an epoxy resin is controlled is realized, and interface caking property between the material and epoxy resin is improved; further, the advantage of the hollow glass bead vacuum structure is fully performed, and density, dielectric constant and electric conductivity of the PBT material are reduced.

Description

Background technique [0001] Polybutylene terephthalate (English name Polybutylene Terephthalate, PBT for short) is a milky white translucent to opaque, crystalline thermoplastic polyester. It has excellent electrical properties, high heat resistance, toughness, fatigue resistance, self-lubrication, low friction coefficient, weather resistance, low water absorption, and maintains various physical properties (including electrical properties) in a humid environment, and moldability Good, so it is widely used in automobiles, electronic and electrical parts as engineering plastics. [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 electrical breakdown of the ignition coil under high voltage and increase the insulation strength of the ignition coil components, the ignition coil component...

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