Catalyst composition for producing polyethylene...

Details Catalyst composition for producing polyethylene... Catalyst composition for producing polyethylene...

2005-02-10

2009-10-27

Gulakowski, Randy (Department: 1796)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C502S152000, C502S154000, C502S174000, C502S216000, C502S226000, C502S353000, C528S281000, C528S285000

Reexamination Certificate

active

07608652

ABSTRACT:
The present invention relates to a catalyst composition for producing polyethylene terephthalate from terephthalic acid and ethylene glycol, comprising:(i) an antimony compound, being present such that the elemental antimony is in a range of about 15 ppm to less than 150 ppm;(ii) a zinc compound, being present such that the elemental zinc is in a range of about 40 to about 160 ppm;as well as a process for the preparation thereof.

REFERENCES:
patent: 5608031 (1997-03-01), Yau et al.
patent: 5623047 (1997-04-01), Yuo et al.
Odian (“Principles of Polymerization”, 3rd Ed., p. 98-99 John Wiley & Son, 1991).

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