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[Chemical Knowledge]：Production method and process of polyester resin raw material

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The manufacturing method
of polyester resin raw material
1. Introduction

polyester resin is an important raw material widely used in the field of chemical production, with excellent physical properties and chemical stability. In order to meet the growing market demand, improving the production efficiency and quality of polyester resin has become an urgent problem to be solved. This article will introduce the manufacturing method of polyester resin in detail, aiming to provide reference for the production of related fields.

2. Materials and Methods

1. Material
The main raw materials for
polyester resins include dibasic acids, glycols and catalysts. The commonly used dibasic acids are terephthalic acid, isophthalic acid, etc.; the commonly used dihydric alcohols are ethylene glycol, propylene glycol, etc. The catalyst is generally tetrabutyl titanate or tetraethyl titanate.

2. equipment

polyester resin production equipment mainly includes reaction kettle, stirrer, thermometer, pressure gauge, condenser, etc.

3. Manufacturing Method

(1) Ingredients: According to the predetermined formula, the dibasic acid, diol and catalyst are added into the reaction kettle in proportion.

(2) Heating: Start the stirrer and gradually increase the temperature in the reaction kettle to a predetermined reaction temperature.

(3) Esterification: Under the action of a catalyst, a dibasic acid and a diol undergo an esterification reaction to generate a polyester resin.

(4) dehydration: through the vacuum dehydration device, the water generated in the reaction process is eliminated.

(5) Post-treatment: After the reaction, the polyester resin is subjected to post-treatment, including cooling, discharging, packaging, etc.

3. Results and Discussion

1. Results

Through the above manufacturing method, we successfully produced polyester resin and tested its properties. The results show that the prepared polyester resin has good physical properties and chemical stability, and meets the relevant standards.

2. Discussion of

In the manufacturing process of polyester resin, the reaction temperature, the amount of catalyst, dehydration effect and other factors will affect the quality of the final product. Therefore, in the actual production process, these parameters need to be strictly controlled to ensure the stability of product quality. In addition, in order to better improve production efficiency, we can further study and optimize the production process, such as the use of continuous production methods, automatic control and so on.

4. Conclusion

This paper introduces the manufacturing method of polyester resin in detail, including the steps of compounding, heating, esterification, dehydration and post-treatment. By strictly controlling the production process parameters, polyester resin with excellent performance can be produced. This study provides a reference for the production of polyester resin and helps to improve production efficiency and quality.

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