PROCESS FOR PRODUCTION OF COPOLYCARBONATES WITH REDUCED COLOR
摘要
A method is provided for reducing the color generated during production of copolycarbonate that includes quinone-type residues. The method includes the steps preparing a reaction mixture containing precursors of monomer residues, selecting a catalyst, introduction strategy and adding catalysts according to the strategy. The strategy is sufficient to result in a product copolycarbonate with improved color. The method further includes the steps of introducing the reaction mixture to a series of process units and allowing the reaction mixture to polymerize thereby forming a copolycarbonate. The resulting copolycarbonate has improved color as compared to a copolycarbonate formed in a process without the steps of selecting a catalyst introduction strategy and introducing catalysts according to the selected strategy.
申请公布号
WO2005073274(A8)
申请公布日期
2006.08.24
申请号
WO2005US02186
申请日期
2005.01.20
申请人
GENERAL ELECTRIC COMPANY;KAMPS, JAN, HENK;LENS, JAN, PLEUN