Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1980-04-28
1982-05-25
Phynes, Lucille M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
525437, 528291, 528292, 528309, C08G 6944, C08G 6368
Patent
active
043318002
ABSTRACT:
A process for producing an aromatic polyester having an increased degree of polymerization, which comprises reacting a substantially linear, fiber forming aromatic polyester containing terminal hydroxyl groups and having an aromatic dicarboxylic acid as a main acid component at an elevated temperature with a bis-cyclic imino ether compound of the formula [I] such as 2,2'-bis(2-oxazoline), 2,2'-bis(5,6-dihydro-4H-1,3-oxadine) thereby bonding the molecular chains of the aromatic polyester to each other by the terminal carboxyl groups thereof to rapidly form said aromatic polyester having an increased degree of polymerization.
Said reaction can be carried out under atmospheric or elevated pressure.
According to the process, an aromatic polyester having a low terminal caboxyl concentration and an increased degree of polymerization can be obtained.
REFERENCES:
patent: 3932358 (1976-01-01), de Cleur et al.
patent: 3959215 (1976-05-01), Schneider
patent: 4138545 (1979-12-01), Emmons et al.
Inata Hiroo
Matsumura Shunichi
Ogasawara Makoto
Phynes Lucille M.
Teijin Limited
LandOfFree
Process for producing aromatic polyesters having an increased de 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 producing aromatic polyesters having an increased de, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing aromatic polyesters having an increased de will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2077700