Polyesters production process

Details Polyesters production process Polyesters production process

1997-04-23

1998-12-15

Short, Patricia A.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525437, 528272, 528274, 528279, 528283, 528285, 528298, 528302, 528307, 528308, 5283083, 5283086, 528481, 528486, 528489, 528491, 528492, 528503, C08G 6378

Patent

active

058498494

ABSTRACT:
An atmospheric pressure process for the continuous production of polyester is disclosed wherein a melt of bis(3-hydroxy propyl) terephthalate, or its low molecular oligomers, obtained by esterifying terephthalic acid or transesterifying dimethyl terephthalate with propylene glycol, is intimately contacted with an inert gas to facilitate polymerization and removal of the reaction by-products. The propylene glycol evolved and the inert gas are recycled.

REFERENCES:
patent: 2578660 (1951-12-01), Auspos et al.
patent: 2647885 (1953-08-01), Billica
patent: 2789972 (1957-04-01), Reynolds et al.
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: 3480587 (1969-11-01), Porter
patent: 3545520 (1970-12-01), Siclari et al.
patent: 3594356 (1971-07-01), Hinton
patent: 4212963 (1980-07-01), Lehr et al.
patent: 4647650 (1987-03-01), Sasaki et al.
patent: 4835293 (1989-05-01), Bhatia
patent: 5064935 (1991-11-01), Jackson et al.
patent: 5434239 (1995-07-01), Bhatia

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