Brominated epoxy resin as well as preparation method and application thereof

Abstract

The invention provides brominated epoxy resin and a preparation method and an application thereof, the preparation method comprises the following steps: mixing bisphenol A epoxy resin, tetrabromobisphenol A and functional epoxy resin, heating and melting under the condition of protective gas, then mixing with a catalyst, heating and reacting to obtain a reaction intermediate; and mixing the obtained reaction intermediate with bisphenol A epoxy resin, heating and reacting again, and cooling to obtain the brominated epoxy resin. The preparation of the brominated epoxy resin is carried out in two steps, the raw materials are added in batches, and the polycondensation reaction is carried out after the intermediate is generated, so that the molecular weight of the product is favorably adjusted, the reaction process is stable, and the reaction endpoint is easy to control; according to the method, by adding the functional epoxy resin, the bromine content of the brominated epoxy resin can be reduced, but the cohesiveness of the brominated epoxy resin can still be ensured, meanwhile, the heat resistance and flame retardance of the brominated epoxy resin are improved, and the impurity residual quantity is low; the method is simple in preparation process, safe and controllable, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis, and relates to a brominated epoxy resin and its preparation method and application. Background technique [0002] Copper-clad laminate, also known as copper-clad laminate, is a product made of electronic glass fiber cloth as a reinforcing material, impregnated with resin, coated with copper foil on one or both sides and hot-pressed. It is a product in the electronics industry. The basic material is mainly used in the manufacture of printed circuit boards. As one of the important components for the preparation of flame-retardant copper-clad laminates, brominated epoxy resin is a new type of epoxy resin developed in recent years. Its molecular structure contains bromine, which not only has the excellent electrical insulation properties of general epoxy resin Adhesive, and also has excellent flame retardancy; since brominated epoxy resin does not produce dioxins, it has become on...

AI Technical Summary

Problems solved by technology

The focus of this method improvement is to improve the glass transition temperature of brominated epoxy resin through the use of high-purity epoxy resin, and does not involve the adjustment of resin adhesion and flame retardancy. The brominated epoxy resin Although it contains two resins with low molecular weight and high molecular weight, it is only a simple physical mixture of the two and does not have the effect of improving stability