Method for producing polyphenylene ether resin

• Main Author: SHINDO YOSHIYUKI
• Format: Patent
• Language: Chinese; English
• Published: 19.01.2021
• 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 relates to a method for producing polyphenylene ether resin. The purpose of the present invention is to provide the method for producing the low-molecular-weight polyphenylene ether resin that can stably recover extremely low-molecular-weight polyphenylene ether and is economically excellent. The method for producing the polyphenylene ether resin having a specific concentration viscosity ([eta] sp/c) of 0.03-0.20 dL/g as measured with a chloroform solution having a concentration of 0.5 g/dL at 30 DEG C, is characterized by comprising a polymerization step for oxidative polymerization of a phenolic compound in the presence of a catalyst and an oxygen-containing gas, wherein the phenol compound is continuously supplied to a first polymerization tank and a second polymerizationtank by using at least three polymerization tanks including first to third polymerization tanks. 本发明涉及聚苯醚树脂的制造方法。本发明的目的在于提供一种能够稳定地回收极低分子量聚苯醚、并且在经济上优异的低分子量聚苯醚树脂的制造方法。本发明为一种聚苯醚树脂的制造方法，其为制造在30℃用浓度0.5g/dL的氯仿溶液测定的比浓粘度(ηsp/c)为0.03～