Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Reexamination Certificate
2006-08-29
2010-06-29
Choi, Ling-Siu (Department: 1796)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
C502S103000, C502S104000, C502S118000, C502S125000, C502S152000, C556S170000, C556S182000, C556S189000, C556S190000, C528S271000, C528S272000, C528S275000, C528S277000
Reexamination Certificate
active
07745368
ABSTRACT:
A stable catalyst solution suitable for catalyzing the polycondensation of reactants to make polyester polymers comprising:(i) M, wherein M is represented by an alkaline earth metal or alkali metal and(ii) aluminum and(iii) ethylene glycol and(iii) organic hydroxyacid compounds having at least three carbon atoms and less than three carboxylic acid groups when the hydroxyacid compound has 8 or less carbon atoms,wherein the molar ratio of ethylene glycol:aluminum is at least 35:1.The hydroxyacid compounds enhance to solubility of M and Al in ethylene glycol, even at even at molar ratios of M:Al approaching 1:1. There is also provided a method for the manufacture of the composition, its feed to and use in the manufacture of a polyester polymer, and polyester polymers obtained by combining certain ingredients or containing the residues of these ingredients in the composition.
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Choi Ling-Siu
Eastman Chemical Company
Graves, Jr. Bernard J.
Nelson Brett L
Tischler Frances
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