Laser-marked PBT material with epoxy resin cohesiveness and preparation technology of laser-marked PBT material

Abstract

The invention discloses a laser-marked PBT material with epoxy resin cohesiveness. The laser-marked PBT material is prepared from the following raw materials in parts by weight: 60-80 parts of PBT, 15-20 parts of cashew phenol amine, 15-20 parts of polyvinyl alcohol microspheres, 5-8 parts of sodium dodecyl sulfate, 5-10 parts of gelatin, 6-12 parts of glass fibers, 1-3 parts of silicone powder, 2-5 parts of laser marking powder and 1-3 parts of antioxidant 245. A coated curing agent is introduced to improve the content of a functional group which has reaction capacity with epoxy resin; meanwhile, a microcapsule curing agent can break a microcapsule under a certain condition to release slowly; and the curing behavior is finished, so that the target of controlling the potting adhesive curing process of the material and the epoxy resin is achieved; and the interface adhesion between the material and the epoxy resin is improved. Graphene is utilized; the laser marking powder is added; the dosage is small; the marking effect is good; and different laser-marked PBT materials can be prepared; and the laser-marked PBT material has relatively good mechanical property and meets the requirements of laser marking in the field of automotive electronics.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a laser-markable 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 40kv that can c...

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