Process for the preparation of polyester containing little depos

Details Process for the preparation of polyester containing little depos Process for the preparation of polyester containing little depos

1993-02-17

1994-08-23

Kight,III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528176, 528180, 528181, 528272, 528285, 528277, 528293, C08G 6302, C08G 6378, C08G 6300

Patent

active

053409060

ABSTRACT:
Disclosed is a process for the preparation of polyester having an ethylene-terephthalate recurring-unit in the amount of not less than 60 molar % of the total recurring-unit of the polyester by polymerizing a bifunctional carboxylic acid comprising terephthalic acid and glycol comprising ethylene glycol in the presence of an antimony compound, at least one metal compound selected from the group consisting of a glycol-soluble magnesium compound, a glycol-soluble manganese compound and a glycol-soluble zinc compound, a hindered phenol compound, and a sulphur-containing ester compound, wherein the metal compound, the hindered phenol compound and a sulphur-containing ester compound are employed under the following conditions:

REFERENCES:
patent: 3929728 (1975-12-01), Chimura et al.
patent: 4782132 (1988-11-01), Nozawa et al.

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