The manufacturing method of polysulfone resin
1. Introduction
Polysulfone resin is a high-performance engineering plastic with excellent heat resistance, chemical corrosion resistance, mechanical strength, and electrical insulation performance. It is widely used in chemical, electronic, mechanical, automotive, aerospace and other fields. This article will introduce the manufacturing method of polysulfone resin, including steps such as raw material preparation, polymerization reaction, and post-treatment
2、 Raw material preparation
1 Bisphenol A: Bisphenol A is the main raw material for preparing polysulfone resin and should have high purity, generally requiring a purity of over 99%
2,4,4 '- Dichlorodiphenylsulfone: 4,4' - Dichlorodiphenylsulfone is another important raw material for preparing polysulfone resins, which also requires high purity
3、 Polymerization reaction
The preparation of polysulfone resin generally adopts solution polymerization method, using bisphenol A and 4,4 '- dichlorodiphenylsulfone as raw materials, and conducting nucleophilic substitution reaction in polar solvent. The specific steps are as follows:
1 Add bisphenol A and polar solvent to the reactor, heat to a certain temperature, and form a bisphenol A solution
2. Under stirring conditions, slowly add 4,4 '- dichlorodiphenylsulfone solution and control the droplet acceleration to maintain a stable reaction temperature
3. Continue stirring and heating to complete the reaction
4、 Post processing
1 Desolvation: After the reaction is completed, pour the reaction solution into a distillation kettle, evaporate the solvent, and obtain the crude product of polysulfone resin
2. Washing: Wash the crude polysulfone resin with hot water to remove residual solvents and by-products
3. Drying: Dry the crude product of the washed polysulfone resin to obtain the finished product of the polysulfone resin
5、 Notes
1 Strictly control the purity and dripping rate of raw materials to avoid the occurrence of side reactions
During the reaction process, the temperature should be kept stable to avoid local overheating leading to a decrease in product quality
During the post-processing, the washing and drying conditions should be controlled to avoid affecting the product performance
6、 Conclusion: The manufacturing method of polysulfone resin includes steps such as raw material preparation, polymerization reaction, and post-treatment, among which polymerization reaction is the key link. By strictly controlling the purity of raw materials, reaction temperature, and post-treatment conditions, high-performance polysulfone resin products can be produced.
