Process for continuously producing polybutylene terephthalate

Details Process for continuously producing polybutylene terephthalate Process for continuously producing polybutylene terephthalate

2006-06-06

2006-06-06

Bhat, N. (Department: 1764)

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

Synthetic resins

From carboxylic acid or derivative thereof

C422S131000, C422S132000, C422S134000, C422S135000, C528S272000

Reexamination Certificate

active

07057007

ABSTRACT:
Polybutylene terephthalate having good heat stability and excellent hydrolysis resistance is continuously produced in a series of a first reactor for reacting an aromatic dicarboxylic acid comprising terephthalic acid as a main ingredient or a derivative thereof with a glycol comprising 1,4-butanediol as a main ingredient, a second reactor for polycondensating the oligomer from the first reactor, and a third reactor for further polycondensating the low polymerization product from the second reactor, or followed by a fourth reactor for further polycondensing the polyester from the third reactor. Another third reactor or a plurality of third reactors can be provided in parallel to the third reactor.

REFERENCES:
patent: 4056514 (1977-11-01), Strehler et al.
patent: 4656241 (1987-04-01), Iida et al.
patent: 4680376 (1987-07-01), Heinze et al.
patent: 5304594 (1994-04-01), Saitou
patent: 6096838 (2000-08-01), Nakamoto et al.
patent: 6458916 (2002-10-01), Yamaguchi et al.
patent: 6590062 (2003-07-01), Yamaguchi et al.
patent: 6723826 (2004-04-01), Yamaguchi et al.
patent: 3544551 (1987-06-01), None
patent: 0 469 607 (1992-02-01), None
patent: 0 724 607 (1996-08-01), None
patent: 0 761 713 (1997-03-01), None
patent: 0 913 418 (1999-05-01), None
patent: 51-81897 (1976-07-01), None
patent: 52-51495 (1977-04-01), None
patent: 10-76102 (1998-03-01), None
patent: 10-316747 (1998-12-01), None
patent: 11-335453 (1999-12-01), None
patent: WO 97/21754 (1997-06-01), None
patent: WO98/10007 (1998-03-01), None
patent: 99/46313 (1999-09-01), None
German Official Action w/translation, dated Feb. 4, 2005, for 100 41 595.4-44 (7 pp. total).
Office Action mailed Sep. 21, 2004, for related Application No. 09/790,539.

Affiliated with

Also associated with

Rating

Process for continuously producing polybutylene terephthalate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for continuously producing polybutylene terephthalate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for continuously producing polybutylene terephthalate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3662817