Method for producing a polyethylene naphthalate

Details Method for producing a polyethylene naphthalate Method for producing a polyethylene naphthalate

1993-07-13

1994-09-27

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528275, 528283, 528287, 528288, C08G 6302

Patent

active

053508297

ABSTRACT:
There is disclosed a method for producing a polyethylene naphthalate from a naphthalenedicarboxylic acid represented by the following formula (I) and a glycol, in the presence of one or more compounds of glycol-soluble magnesium compounds, glycol-soluble manganese compounds, and glycol-soluble zinc compounds; a nitrogen-containing basic compound; and a phosphorous compound; which method comprises adding a glycol-soluble germanium compound of a limited amount, as a polymerization catalyst, at a limited relationship between amounts of said metal compound, the said nitrogen-containing basic compound, and the said phosphorous compound.
formula (I) ##STR1##

REFERENCES:
patent: 5051292 (1991-09-01), Katoh et al.

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