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:
Oct. 16, 2007
Filed:
May. 27, 2004
Method for incorporating nitrogen containing methine light absorbers in pet and compositions thereof
Max Allen Weaver, Kingsport, TN (US);
Jason Clay Pearson, Kingsport, TN (US);
Dale Milton Blakely, Kingsport, TN (US);
Frederick Leslie Colhoun, Kingsport, TN (US);
Max Allen Weaver, Kingsport, TN (US);
Jason Clay Pearson, Kingsport, TN (US);
Dale Milton Blakely, Kingsport, TN (US);
Frederick Leslie Colhoun, Kingsport, TN (US);
Eastman Chemical Company, Kingsport, TN (US);
Abstract
The present invention is a method for efficiently incorporating a nitrogen containing methine light absorber into a polyester resin. The method includes forming a reaction mixture comprising combining a diol component, a diacid component selected from the group consisting of dicarboxylic acids, dicarboxylic acid derivatives, and mixtures thereof, an antimony containing compound, a phosphorus containing compound, a metal containing compound, and a nitrogen containing methine light absorber. The reaction mixture is polymerized in a polycondensation reaction system. In another embodiment the light absorber is added while the reaction products of one reactor are being transferred to the next reactor in the polycondensation reaction system. The present invention is also directed articles made from the polyester resin.