Process for preparing polyethylene naphthalate based polymers by using NDCA or its derivates
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 27, 2001
Grant Date -
N/A
app pub date -
Jun 7, 2000
filing date -
Feb 26, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention provides a process for preparing polyethylene naphthalate polymers comprising: esterifying a slurry comprising NDCA or a dicarboxylic acid containing NDCA or derivatives thereof, and ethylene glycol or a glycol containing ethylene glycol or derivatives thereof to produce esterification compounds comprising bis (beta-hydroxyethyl) naphthalate or low molecular weight polymers thereof, wherein one or more primary alcohol is added to the slurry; and polycondensing the above resultant esterification compounds to produce polyethylene naphthalate polymers. The process of the present invention allows for the preparation of a slurry more easily and to maximize the manufacturing efficiency. Ultimately, it is possible to increase the productivity of the PEN polymers and to obtain high quality PEN since the method of the present invention has an effect of minimizing side products of the polymerization by reducing the amount of ethylene glycol considerably and of shortening the reaction time of the esterification reaction.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully