The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 2000
Filed:
Oct. 04, 1999
Timothy Edward Banach, Scotia, NY (US);
Maurizio Fiorini, Bologna, IT;
Bimal Ramesh Patel, Evansville, IN (US);
Francesco Pilati, Bologna, IT;
Corrado Berti, Lugi, IT;
Elisabetta Marianucci, Bologna, IT;
Massimo Messori, Bologna, IT;
Martino Colonna, Bologna, IT;
Maurizio Toselli, Bologna, IT;
General Electric Company, Schenectady, NY (US);
Abstract
Polyesters are prepared by the reaction of a dicarboxylic acid, preferably an aromatic acid such as terephthalic acid, or an ester or ester-forming derivative thereof with a dihydroxy compound such as 1,4-butanediol in the presence of a catalyst composition comprising the combination of a titanium-based compound such as tetra-n-butyl titanate, a zirconium-based compound such as zirconium tetrakis(2,4-pentanedionate) and a phosphate-forming compound such as sodium dihydrogen phosphate. This catalyst composition affords polyesters having relatively low melt viscosities in short reaction times and does not produce an excessive level of undesirable reaction by-products.