Method for continuously producing polycarbonate and polycarbonate

• Main Authors: WANG LEI, LI CHENG, LUO JIAHUI, SUI DONGWU, LI CUN, WANG YAQING, GAO JUNMIN
• Format: Patent
• Language: Chinese; English
• Published: 21.05.2024
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention provides a method for continuously producing polycarbonate and polycarbonate, and the method comprises the following steps: reacting bisphenol sodium salt with phosgene to obtain a photochemical reaction solution, carrying out three-stage dispersion on the obtained photochemical reaction solution through three-stage dispersion equipment, adding an end-capping reagent into the photochemical reaction solution before each stage of dispersion to obtain a dispersed emulsion, and continuously producing the polycarbonate. And finally, carrying out condensation polymerization on the obtained dispersion emulsion to obtain the polycarbonate. According to the method, the end-capping effect of the end-capping agent is improved, and the polycarbonate which is low in terminal hydroxyl group content, narrow in molecular weight distribution and excellent in yellowing resistance is successfully prepared under the condition that an amine catalyst is not used. 本发明提供一种连续生产聚碳酸酯的方法及聚碳酸酯，所述方法首先将双酚钠盐和光气进行反应，得到光化反应液，再将得