Process for preparing polyester resin and the polyester resin th

Details Process for preparing polyester resin and the polyester resin th Process for preparing polyester resin and the polyester resin th

1992-06-03

1994-04-12

Acquah, Samuel A.

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

Synthetic resins

From carboxylic acid or derivative thereof

528272, 528295, 528297, 528298, 528302, 528308, 5283086, 528 88, 528 97, 528 99, 528103, 528112, 528115, 525437, 525449, 524 81, C08G 6385

Patent

active

053026900

ABSTRACT:
Polyester resins are prepared by reacting a lower alkyl ester of an aromatic dicarboxylic acid with an aliphatic diol to form an aromatic polyester, and which includes (i) subjecting to transesterification reaction conditions in the presence of a titanium compound catalyst a transesterification reaction system having the lower alkyl ester of the aromatic dicarboxylic acid, the aliphatic and between 0.02 to 5.0 mole percent, based on the amount of the lower alkyl ester of the aromatic dicarboxylic acid, of an aromatic sulfonic acid compound represented by the following general formula (I):

REFERENCES:
patent: 4390493 (1983-06-01), Yasui et al.
Makromolekulare Chemie, Macromolecular Chemistry and Physics, vol. 187, No. 10, 1986, Basel CH, pp. 2387-2400, Mariano Pracella, the whole document.

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