Process for producing an aromatic polyester copolymer

Details Process for producing an aromatic polyester copolymer Process for producing an aromatic polyester copolymer

1981-12-03

1982-12-07

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528126, 528128, 528173, 528176, 528180, C08G 6224, C08G 628

Patent

active

043628583

ABSTRACT:
A process for producing an aromatic polyester copolymer wherein the alternating configuration of the components making up the copolymer is highly regular, said process comprising a first step of reacting a dihydric phenolic compound with an aromatic dicarboxylic acid dichloride A in a reaction medium consisting of water and a water-immiscible solvent in the presence of a basic inorganic compound to give a phenolic hydroxyl-terminated aromatic oligoester containing predominantly an oligomer having a degree of polymerization of 1-2, and a second step of reacting the aromatic dihydroxy oligoester obtained in the first step with an aromatic dicarboxylic acid dichloride B in the presence of a basic inorganic compound in an amount at least sufficient to neutralize the free phenolic hydroxyl groups remaining in the reaction product mixture obtained in the first step.

REFERENCES:
patent: 3234167 (1966-02-01), Sweeny et al.
patent: 4201855 (1980-05-01), Segal
patent: 4252939 (1981-02-01), Mori et al.

Affiliated with

Also associated with

Rating

Process for producing an aromatic polyester copolymer 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 an aromatic polyester copolymer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing an aromatic polyester copolymer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1904138