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Patent Searching and Data


Title:
POLYETHYLENENAPHTHALATE
Document Type and Number:
Japanese Patent JP2006111886
Kind Code:
A
Abstract:

To provide a favorable polyethylene naphthalate which has a well balance among the haze, the transparency, the hue and the thermal stability when the polyethylene naphthalate is bottle-molded.

This polyethylene naphthalate is a polyester comprising a naphthalenedicarboxylic acid as a main acid component and ethylene glycol as a main glycol component. The polyethylene naphthalate has an inherent viscosity of 0.40-0.90 dL/g and contains a cobalt compound, a magnesium compound, a calcium compound, a phosphorus compound and an antimony compound as polymerization catalysts in each amount which satisfies respectively all of the following equations (1) to (5): 0.08≤Co≤1.2 mole (1), 2.0≤(Mg+Ca)≤6.0 mole (2), 1.3≤(Mg/Ca)≤6.0 (3), 1.0≤P/(Co+Ca+Mg)≤1.5 (4), 0.8≤Sb≤3.0 mole (5), wherein each symbol of metal elements represents the amount of each metal in number of moles relative to 106 g of the amount of the above-noted acid component.


Inventors:
SUZUKI MINORU
SATO KIMIHIKO
Application Number:
JP2005356090A
Publication Date:
April 27, 2006
Filing Date:
December 09, 2005
Export Citation:
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Assignee:
TEIJIN LTD
International Classes:
C08G63/82
Attorney, Agent or Firm:
Hideko Mihara