Hyperbranched resin toughened PBT (polybutylene terephthalate) material with epoxy resin bonding performance and preparation method for hyperbranched resin toughened PBT material

Abstract

The invention discloses a hyperbranched resin toughened PBT (polybutylene terephthalate) material with epoxy resin bonding performance. The hyperbranched resin toughened PBT material consists of the following raw materials in parts by weight: 60 to 80 parts of PBT, 15 to 20 parts of cardanol amine, 15 to 20 parts of polyvinyl alcohol microspheres, 5 to 8 parts of sodium dodecyl sulfate, 5 to 10 parts of gelatin, 6 to 8 parts of fiberglass, 4 to 7 parts of a toughening agent, 1 to 3 parts of polyethylene wax and 1 to 3 parts of an antioxidant 168. According to the hyperbranched resin toughened PBT material, a coated curing agent is introduced to increase the content of functional groups capable of being reacted with epoxy resin in the material, and meanwhile, a microcapsule of the microcapsule curing agent can be broken to be slowly released under a certain condition to implement curing, so that the aim of controlling a material and epoxy resin pouring sealant curing process is fulfilled, and the interface bonding performance between the material and the epoxy resin is improved; in addition, hyperbranched resin in the toughening agent has high compatibility with the PBT, and another toughening agent is matched, so that the compatibility and the processibility of the PBT material are improved, and the toughness of the composite PBT material and bonding power with a metal material are improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a hyperbranched resin toughened PBT material with epoxy resin adhesion and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (English name Polybutylene Terephthalate, referred to as PBT) is milky white [0003] Color 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. [0004] 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 ...

AI Technical Summary

Problems solved by technology

[0006] Chinese patent CN 104610711 B discloses a PBT material with good epoxy resin adhesion and its preparation method. The invention uses antioxidant 24-44, antioxidant 168, antioxidant 1010 and carbon free scavenger HP136 The compounding, through the synergistic effect of each component, makes the material have excellent anti-aging performance, introduces reactive functional groups that have the ability to react with epoxy resin, and improves the interfacial adhesion with epoxy resin, but when using epoxy resin Rapid viscosity changes make it difficult to control the curing process, and rapid curing results in reduced encapsulation efficiency