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1. AU2003235438 - Process for producing polyester and polyester resin

Office
Australie
Numéro de la demande 2003235438
Date de la demande 27.05.2003
Numéro de publication 2003235438
Date de publication 04.09.2003
Type de publication A
CIB
C08G 63/78
CCHIMIE; MÉTALLURGIE
08COMPOSÉS MACROMOLÉCULAIRES ORGANIQUES; LEUR PRÉPARATION OU LEUR MISE EN UVRE CHIMIQUE; COMPOSITIONS À BASE DE COMPOSÉS MACROMOLÉCULAIRES
GCOMPOSÉS MACROMOLÉCULAIRES OBTENUS PAR DES RÉACTIONS AUTRES QUE CELLES FAISANT INTERVENIR UNIQUEMENT DES LIAISONS NON SATURÉES CARBONE-CARBONE
63Composés macromoléculaires obtenus par des réactions créant une liaison ester carboxylique dans la chaîne principale de la macromolécule
78Procédés de préparation
CPC
C08G 63/78
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
63Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
78Preparation processes
Déposants Mitsubishi Chemical Corporation
Inventeurs Fujino, Hideyuki
Uesaka, Takahiro
Yamamoto, Masanori
Données relatives à la priorité 2002-168668 10.06.2002 JP
Titre
(EN) Process for producing polyester and polyester resin
Abrégé
(EN) A process for polyester production improved in color tone and polymerizability, in which side reactions are inhibited from occurring during polycondensation. The process for polyester production comprises (A) a step in which a dicarboxylic acid or dialkyl dicarboxylate and a diol are subjected as major starting materials to esterification or transesterification in the presence of a catalyst to produce an oligomer having a degree of esterification or transesterification of 90% or higher and (B) a polycondensation step in which the oligomer is continuously condensation-polymerized in a molten state in reaction tanks disposed in multistage arrangement, and is characterized in that the polycondensation step (B) satisfies the relationship TMAX > T(&ohgr;) wherein TMAX (°C) is the internal temperature of the tank having the highest internal temperature and T(&ohgr;) (°C) is the internal temperature of the final tank.
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