Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2007-10-16
2007-10-16
Boykin, Terressa (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C524S706000, C524S783000, C524S784000, C524S785000, C528S275000, C528S279000, C528S280000, C528S281000, C528S283000, C528S285000, C528S286000, C528S289000, C528S290000, C528S291000, C528S292000, C528S298000, C528S300000, C528S302000, C528S307000, C528S308000, C528S308600
Reexamination Certificate
active
10855919
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.
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Copending application filed on even date herewith “Process For Adding Nitrogen Containing Methine Light Absorbers To Poly(ethylene Terephthalate)”.
Blakely Dale Milton
Colhoun Frederick Leslie
Pearson Jason Clay
Weaver Max Allen
Boykin Terressa
Carmen Dennis V.
Eastman Chemical Company
Graves, Jr. Bernard J.
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