Title:
POLYETHYLENE NAPHTHALATE FOR BOTTLE
Document Type and Number:
Japanese Patent JP3249287
Kind Code:
B2
Abstract:
PURPOSE: To obtain the naphthalate by selecting the amounts of the constituents of a specified catalyst and the ratio therebetween and specifying the optical characteristics of the obtained polymer.
CONSTITUTION: This naphthalate is a polyester made from an acid component based on naphthalenedicarboxylic acid and a glycol component based on ethylene glycol, and produced by using a catalyst comprising manganese compound, a phosphorus compound and an antimony compound and satisfying the relationships: 0.7mol≤Mn≤1.7mol, 0.5≤Mn/P≤1.2, and 1.0mol≤Sb≤3mol (wherein the amounts are represented in terms of the number of moles of the elements par 106g of the acid component) and having a transmittance of 95%/cm or above to light at a wavelength of 400nm as measured by dissolving 10mg/ml of the polymer in a hexafluoroisopropanol/chloroform 2/3 mixed solvent and a difference of this transmittance from the transmittance to light of 420nm of 3% or below.
Inventors:
Hiroki Nagano
Application Number:
JP5025094A
Publication Date:
January 21, 2002
Filing Date:
March 22, 1994
Export Citation:
Assignee:
Teijin Limited
International Classes:
B29C49/00; B29D22/00; C08G63/181; C08G63/189; C08G63/82; C08J5/00; B29K67/00; (IPC1-7): C08G63/189; C08J5/00
Domestic Patent References:
| JP2112411A |
Attorney, Agent or Firm:
Sumihiro Maeda
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