Manufacturing Method of Polycarbonate Resin
I. Introduction
Polycarbonate resin (Polycarbonate, abbreviated as PC) is a high-performance engineering plastics with excellent mechanical, optical, electrical and thermal properties, widely used in automotive, electrical and electronic, construction, medical equipment and other fields. In this article, we will introduce the manufacturing method of polycarbonate resin in detail.
II, raw materials and formulations
The raw materials for the manufacture of polycarbonate resin mainly include bisphenol A, diphenyl carbonate, sodium hydroxide and so on. Among them, bisphenol A and diphenyl carbonate are monomers for synthesizing polycarbonate, and sodium hydroxide is used as a catalyst.
3. Manufacturing process
The manufacturing process of polycarbonate resin mainly includes the following steps:
1. Dosing: add bisphenol A, diphenyl carbonate and sodium hydroxide into the dosing tank according to a certain proportion, and mix well.
2. Polymerization: The mixture in the dosing tank is transferred to the polymerization reactor, where the polymerization reaction is carried out at a certain temperature and pressure to produce polycarbonate resin.
3. Post-treatment: After the polymerization reaction is finished, the generated polycarbonate resin is subjected to post-treatment, including de-volatilization, granulation, drying and other processes, in order to obtain the final product.
Four, key technology and operation points
1. batching: ensure the quality and purity of raw materials to avoid impurities into the reaction system. At the same time, the proportion of each raw material should be strictly controlled to ensure the smooth progress of the polymerization reaction.
2. Polymerization: Polymerization reaction is a key step in the manufacture of polycarbonate resin, and it is necessary to control the reaction temperature and pressure, as well as the reaction time, in order to obtain moderate molecular weight and excellent performance of polycarbonate resin.
3. Post-treatment: The post-treatment process should pay attention to controlling the drying temperature and time, in order to avoid moisture or deterioration of the product. At the same time, granulation should ensure uniform particle size to facilitate subsequent processing and use.
V. Equipment selection and configuration
In the manufacturing process of polycarbonate resin, it is necessary to use to the dosage tank, polymerization reactor, de-volatilization equipment, granulator, dryer and other equipment. In the selection of equipment, should give full consideration to factors such as production efficiency, product quality, safety and environmental protection, choose stable performance, easy to operate, easy to maintain the equipment. At the same time, the configuration of the equipment should also be based on the scale of production and process flow for a reasonable layout, in order to improve production efficiency and reduce energy consumption.
VI, quality control and testing
In order to ensure the quality of polycarbonate resin products, the need to establish a sound quality control system and testing methods. In the production process, the quality of raw materials, reaction conditions, product performance and other strict monitoring, timely detection and resolution of problems. At the same time, the final product should be comprehensive performance testing to ensure that the product meets the relevant standards and customer requirements.
VII, environmental protection and safety measures
In the manufacturing process of polycarbonate resin, pay attention to environmental protection and safety measures. It is necessary to minimize the discharge of wastewater, waste gas, waste residue and other pollutants, and take effective management measures to meet the environmental requirements. At the same time, the safety management of the production site should be strengthened to prevent the occurrence of fire, explosion and other safety accidents.
VIII.Conclusion
Polycarbonate resin, as an important raw material for the production of chemicals, its manufacturing method involves a number of links and key technologies. By mastering the knowledge of manufacturing process flow, key technologies and operation points, equipment selection and configuration, we can better understand and apply the manufacturing technology of polycarbonate resin, improve product quality and production efficiency, and promote the sustainable development of the chemical industry.
