Electrophilic Substitution at Saturated Carbon. XXV. Structural Requirements for Functional Groups Centered around Second-Row Elements to Preserve Asymmetry of Carbanions1,2
METHOD FOR MAKING MOLDED POLYCARBONATE ARTICLES WITH IMPROVED COLOR
申请人:SABIC Innovative Plastics IP B.V.
公开号:EP2041202B1
公开(公告)日:2013-05-08
POLYCARBONATES, COMPOSITIONS MADE THEREFROM, METHODS OF MANUFACTURE THEREOF, AND ARTICLES THEREFROM
申请人:SABIC Innovative Plastics IP B.V.
公开号:EP2370498A1
公开(公告)日:2011-10-05
Method for Making Molded Polycarbonate Articles with Improved Color
申请人:Berndsen Sjef
公开号:US20080004407A1
公开(公告)日:2008-01-03
A method for preparing a molded article includes the steps of (a) obtaining a polycarbonate resin and (b) molding the polycarbonate resin. The polycarbonate resin is made by a transesterification reaction using an activated diaryl carbonate such that the polycarbonate is susceptible to the formation of internal ester linkages (IEL). The method occurs with the proviso that the polycarbonate resin, the molding conditions or both are selected to control the amount of IEL formed during the molding process to a level of less than 0.4 mol %.