Thermally stable polyester, process for its preparation and its use
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 11, 2005
Grant Date -
Jun 5, 2003
app pub date -
Nov 15, 2002
filing date -
Nov 30, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A polyester with a carbon black content of up to 20% by weight, based on the polyester, is condensed, after transesterification of DMT with diol, or after esterification of terephthalic acid with diol, with the aid of a titanium-based catalyst. The carbon black is added in the form of a carbon black dispersion together with the polycondensation catalyst to the transesterification product or esterification product. The carbon black dispersion comprises gas black or furnace black and a dispersing agent, and these are dispersed in diol. The diameter of the carbon black particles is below that of carbon black particles in a polyester using an antimony compound as catalyst.
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Cited Art Landscape
Patent Citation Ranking
- 7 Citation Count
- C08L Class
- 5.20 % this patent is cited more than
- 20 Age
