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[Chemical Knowledge]：Manufacturing method and process of epoxy resin

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The manufacturing method
of epoxy resin
1. Introduction

Epoxy resin is a kind of important thermosetting plastic, widely used in the field of chemical production raw materials. Due to its excellent physical properties, electrical insulation properties, chemical resistance and processing properties, epoxy resin has become an important material in many industries. This article will introduce the manufacturing method of epoxy resin in detail.

2. epoxy resin manufacturing raw materials

epoxy resin manufacturing raw materials mainly include epoxy resin monomer, hardener and accelerator. Among them, the epoxy resin monomer is the main component, and the common epoxy resin monomer includes bisphenol A type epoxy resin, novolac type epoxy resin, aliphatic type epoxy resin, etc. Hardener is used to make epoxy resin monomer cross-linking reaction, the formation of three-dimensional network structure of the material. Common hardeners are amine hardeners, acid anhydride hardeners, etc. Accelerator is used to accelerate the cross-linking reaction of the material, common with tertiary amine promoter.

3. Epoxy Resin Manufacturing Process

1. Epoxy Resin Monomer Synthesis

Bisphenol A epoxy resin is the most common epoxy resin monomer, the synthesis method is mainly based on bisphenol A and epichlorohydrin as raw materials, in the role of alkaline catalyst ring-opening polymerization reaction. The specific steps are as follows:

(1) Bisphenol A and an alkaline catalyst are added into a reaction kettle and heated to a certain temperature. Epichlorohydrin was added dropwise

(2), and the dropping rate and reaction temperature were controlled to make the reaction proceed smoothly. After completion of the reaction of the

(3), a post-treatment was carried out to obtain a bisphenol A- type epoxy resin monomer.

2. Preparation and
of Epoxy Resin Epoxy resin glue can be obtained
mixing epoxy resin monomer with hardener, accelerator and the like in a certain proportion. During the mixing process, attention should be paid to controlling the temperature and stirring speed to ensure that the components are fully mixed and evenly.

3. Epoxy resin molding

epoxy resin glue can be processed by casting, injection molding, extrusion and other molding methods to obtain various shapes of epoxy resin products. In the process of processing, it is necessary to pay attention to the control of temperature, pressure and other parameters to ensure the quality and performance of the products.

4. matters needing attention in the manufacturing process of epoxy resin

1. quality control of raw materials: the quality of raw materials has a vital influence on the performance of epoxy resin, so it is necessary to strictly control the quality of raw materials to ensure the purity and activity of raw materials.
2. The control of reaction conditions: the reaction temperature, reaction time, pH value and other factors will affect the synthesis efficiency and performance of epoxy resin, so it is necessary to accurately control the reaction conditions.
3. Control of mixing uniformity: The components of the epoxy resin need to be fully mixed evenly, otherwise it will affect the performance and service life of the product. Therefore, it is necessary to control the stirring speed and time during the mixing process.
4. molding process control: molding process need to pay attention to control temperature, pressure and other parameters, to avoid bubbles, cracks and other defects, to ensure the quality and performance of products.

5. conclusion

epoxy resin as an important raw material for chemical production, its manufacturing method involves many links and precautions. Through strict control of key factors such as raw material quality, reaction conditions, mixing uniformity and molding processing, epoxy resin products with excellent performance can be manufactured to provide important material support for various industries.

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