3555-19-9

Upstream product

• 5716-77-8 2,2-bis-(4-methoxy-phenyl)-3-methyl-butane 
• 563-80-4 3-methyl-butan-2-one 
• 7647-01-0 hydrogenchloride 
• 108-95-2 phenol 
• 52173-62-3 1,1-bis-(4-methoxy-phenyl)-2,2-dimethyl-propan-1-ol 
• 13139-86-1 4-methoxyphenyl magnesium bromide 
• 6190-75-6 3,3-bis-(4-methoxy-phenyl)-2-methyl-but-1-ene 

Relevant academic research and scientific papers

Processes for producing aromatic polycarbonate oligomer and aromatic polycarbonate

A process for producing continuously an aromatic polycarbonate oligomer by reacting an aromatic dihydroxy compound and an alkali metal base or an alkaline earth metal base with a carbonyl halide compound comprises: (1) feeding continuously to a tank reactor an aromatic dihydroxy compound, water, a molecular weight controlling agent, a polymerization catalyst, a carbonyl halide compound, and an organic solvent, and an alkali metal base or an alkaline earth metal base in an amount of 1.15-1.6 equivalents based on the aromatic dihydroxy compound, (2) carrying out the reaction with a residence time as defined by the following formula, where X is an amount of the polymerization catalyst in terms of mole % based on the amount of mole of the aromatic dihydroxy compound fed per unit time, and Y is a residence time (min.), and (3) continuously withdrawing the reaction mixture from the tank reactor to obtain an aromatic polycarbonate oligomer having a number average molecular weight of 1,000-10,000. An aromatic polycarbonate is produced by polycondensation of the aromatic polycarbonate oligomer.