HERSTELLUNG VON COPOLYCARBONAT DURCH POLYMERISATION IN FESTER PHASE

• Main Authors: SIVARAN, SWAMINATHAN, CHAVAN, NAYAKU NIVARATI, KING, JOSEPH ANTHONY JR, FABER, REIN MOLLERUS, MENON, SHAMAL KARUNAKARAN, BAILLY, CHRISTIAN MARIA EMILE, IDAGE, BHASKAR BHAIRAVNATH, VARADARAJAN, GODAVARTHI SATYANA, CHATTERJEE, GAUTAM, MCLOSKEY, PATRICK JOSEPH, DAY, JAMES, JADHAV, ARUN SAVALARAM
• Format: Patent
• Language: German
• Published: 15.12.2004
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

Copolycarbonates containing such structural units as birefringence-reducing or "soft block" units are prepared by conducting a reaction, such as melt polymerization or equilibration, between a precursor polycarbonate and a monomer, polycarbonate oligomer or high molecular weight polycarbonate which is a source of other structural units. The crystallinity of the resulting precursor copolycarbonate or one of the reagents employed in its preparation is enhanced and the precursor copolycarbonate is subjected to solid state polymerization.