PROCESS FOR THE PRODUCTION OF COPOLYCARBONATES WITH REDUCED COLOR
摘要
<p>A method is provided for reducing the color generated during production of copolycarbonate that includes quinone-type residues. The method includes the steps of mixing the precursors of monomer residues, a carbonate source and a polymerization catalyst into a reaction mixture. The method further includes the steps of introducing an antioxidant such as a hydroxycarboxylic acid to the reaction mixture in an amount sufficient to reduce color formation and introducing the reaction mixture to a series of process units wherein the reaction mixture polymerizes. The resulting copolycarbonate has improved color as compared to a copolycarbonate formed in a process without the step of introducing an antioxidant to the melt polymerization process.</p>
申请公布号
WO2005073273(A1)
申请公布日期
2005.08.11
申请号
WO2005US01628
申请日期
2005.01.20
申请人
GENERAL ELECTRIC COMPANY;KAMPS, JAN, HENK;LENS, JAN, PLEUN