METHOD FOR PRODUCING POLYETHYLENE TEREPHTHALATE

PROBLEM TO BE SOLVED: To provide a polyethylene terephthalate resin characterized as high transparency with a small amount of a cyclic trimer after molding and produced by using Ti as a catalyst. SOLUTION: The amount of the cyclic trimer in a molded product obtained by injection molding is regulated...

Full description

Saved in:
Bibliographic Details
Main Authors HIRAOKA SHOJI, MUKAI NOBUTADA
Format Patent
LanguageEnglish
Published 19.10.2006
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
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To provide a polyethylene terephthalate resin characterized as high transparency with a small amount of a cyclic trimer after molding and produced by using Ti as a catalyst. SOLUTION: The amount of the cyclic trimer in a molded product obtained by injection molding is regulated to ≤0.40 wt.% by absorbing ≥2,000 ppm of moisture in the polyethylene terephthalate resin containing ≥3 to ≤30 ppm of the Ti and then heat-treating the polyethylene terephthalate at 120-200°C for ≥0.5 h. The Ti atom and P atom are preferably contained in ≤1.3 molar ratio (Ti/P). COPYRIGHT: (C)2007,JPO&INPIT
Bibliography:Application Number: JP20050100950