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:
Jun. 02, 2009
Filed:
May. 27, 2004
Perry Michael Murdaugh, Sr., Lexington, SC (US);
Earl Edmondson Howell, Jr., Kingsport, TN (US);
Cory Lee Wells, Gray, TN (US);
Max Allen Weaver, Kingsport, TN (US);
Jason Clay Pearson, Kingsport, TN (US);
Perry Michael Murdaugh, Sr., Lexington, SC (US);
Earl Edmondson Howell, Jr., Kingsport, TN (US);
Cory Lee Wells, Gray, TN (US);
Max Allen Weaver, Kingsport, TN (US);
Jason Clay Pearson, Kingsport, TN (US);
Eastman Chemical Company, Kingsport, TN (US);
Abstract
A method for incorporating a UV light absorbing compound into a polyester prepared using direct esterification of reactants selected from a dicarboxylic acid and a diol. The method comprises reacting the reactants in an esterifying reactor under conditions sufficient to form an esterified product including at least one of an ester, an oligomer, or mixture having an ester and a mixture of low molecular weight polyester; polymerizing the esterified product in a polycondensation reactor to form a polyester; and adding the UV absorbing compound to the esterified products when at least 50% of the carboxy groups initially present in the reactants have been esterified to obtain a yield of UV absorbing compound incorporated into the polyester of greater than 25%. Articles utilizing the UV protected polyester prepared by the method of the invention are additionally disclosed.