Preparation of polyethylene terephthalate

Details Preparation of polyethylene terephthalate Preparation of polyethylene terephthalate

1990-05-24

1991-03-19

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528277, 528280, 528285, 528286, 5283083, 5283085, 5283086, 524127, 524408, 524413, 524417, C08G 6302

Patent

active

050012169

ABSTRACT:
A process is disclosed for preparing polyethylene terephthalate having a predetermined intrinsic viscosity which involves the direct esterification of terephthalic acid with ethylene glycol followed by the polycondensation of the esterification product using a polycondensation catalyst system containing cobalt, manganese-, and antimony-containing components.

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patent: 3907754 (1975-09-01), Tershansy et al.
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patent: 4010145 (1977-03-01), Russin et al.
patent: 4189603 (1980-02-01), Shigeyasu et al.
patent: 4223124 (1980-09-01), Broughton et al.
patent: 4499262 (1985-02-01), Faberburg et al.
patent: 4501878 (1985-02-01), Adams
patent: 4772748 (1988-09-01), Hashizume et al.

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