Copolycarbonate preparation by solid state polymerization

Copolycarbonate preparation by solid state polymerization

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 polycarbon...

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Bibliographische Detailangaben
Hauptverfasser: ARUN SAVALARAM JADHAV, SHAMAL KARUNAKARAN MENON, JAMES DAY, PATRICK JOSEPH MCLOSKEY, SWAMINATHAN SIVARAN, GODAVARTHI SATYANA VARADARAJAN, GAUTAM CHATTERJEE, JOSEPH ANTHONY KING JR, NAYAKU BIVARATI CHAVAN, CHRISTIAN MARIA EMILE BAILLY, REIN MOLLERUS FABER, BHASKAR BHAIRAVNATH IDAGE
Format: Patent
Sprache:eng
Schlagworte:
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
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Beschreibung
Zusammenfassung: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.