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TERMINAL-CAPPED BRANCH TYPE POLYCARBONATE RESIN HAVING EXCELLENT STABILITY IN HIGH TEMPERATURES, AND AN ENVIRONMENT-FRIENDLY MANUFACTURING METHOD THEREOF
TERMINAL-CAPPED BRANCH TYPE POLYCARBONATE RESIN HAVING EXCELLENT STABILITY IN HIGH TEMPERATURES, AND AN ENVIRONMENT-FRIENDLY MANUFACTURING METHOD THEREOF
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机译:在高温下具有出色稳定性的端基支链型聚碳酸酯树脂及其环保生产方法
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PURPOSE: A manufacturing method of a terminal-capped branch type polycarbonate resin is provided not to use organic solvent by using a melt-polymerization method, thereby being economic, and not to use phosgene, thereby being safe and environment-friendly.;CONSTITUTION: A terminal-capped branch type polycarbonate resin has weight average molecular weight of 30,000-200,000. The content of terminated hydroxy groups is 0-8 mol%. A manufacturing method of the terminal-capped branch type polycarbonate resin comprises: a step of manufacturing a terminal-capped carbonate oligomer by polymerizing an aromatic dihydroxy compound and diaryl carbonate; a step of manufacturing a terminal-capped linear type polycarbonate by melt polymerization of the terminal-capped carbonate oligomer and a linear polycarbonate; and a step of manufacturing a terminal-capped branch type polycarbonate by putting a branching agent into the terminal-capped carbonate oligomer and a linear polycarbonate.;COPYRIGHT KIPO 2012
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