Continuous polyester process

Details Continuous polyester process Continuous polyester process

1983-10-18

1995-07-18

Acquah, Samuel A.

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

Synthetic resins

From carboxylic acid or derivative thereof

528272, 528279, 528283, 528285, 5283083, 5283086, 528481, 528489, 528491, 528492, 528503, C08G 6378

Patent

active

054342392

ABSTRACT:
An atmospheric pressure process for the continuous production of polyester is disclosed wherein a melt of dihydroxy ethyl terphthalate, or its low molecular oligomers, obtained by esterifying terephthalic acid or transesterifying dimethyl terephthalate with ethylene glycol, is intimately contacted with an inert gas to facilitate polymerization and removal of the reaction by-products. The ethylene glycol evolved and the inert gas are recycled.

REFERENCES:
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patent: 2647885 (1953-08-01), Billica
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patent: 2973341 (1961-02-01), Hippe et al.
patent: 3110547 (1963-11-01), Emmert
patent: 3390135 (1968-06-01), Seiner
patent: 3469618 (1969-09-01), Siclari et al.
patent: 3545520 (1970-12-01), Siclari et al.
patent: 3594356 (1971-07-01), Hinton
patent: 4835293 (1989-05-01), Bhatia

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