METHOD FOR PRODUCING POLYESTER

PROBLEM TO BE SOLVED: To provide a method for continuously polymerizing a polyester, wherein the production efficiency is improved by the optimization of polymerization conditions without improving the basic process or replacing the existing reactor with a highly efficient one. SOLUTION: Provided is...

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Bibliographic Details
Main Authors MURAKAMI MASASHIGE, KAWAJI TOMIO, MOTOMURA YASUO
Format Patent
LanguageEnglish
Published 27.11.2001
Edition7
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
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Summary:PROBLEM TO BE SOLVED: To provide a method for continuously polymerizing a polyester, wherein the production efficiency is improved by the optimization of polymerization conditions without improving the basic process or replacing the existing reactor with a highly efficient one. SOLUTION: Provided is a method for continuously producing a polyester by esterifying starting materials being an alkylene terephthalate and/or an isomer thereof and a glycol and/or an esterifiable derivative thereof and polycondensing the obtained polyester oligomer, wherein the terminal carboxyl content of the polyester oligomer fed into the last reactor is 9-30 eq./t.
Bibliography:Application Number: JP20000148264