Eastman-kodak Company

Eastman Chemical Company

Dale Milton Blakely

Max Allen Weaver

Jason Clay Pearson

Robert W Seymour

Frederick Leslie Colhoun

Samuel D Hilbert

Bruce Roger DeBruin

Michael Paul Ekart

Horst Clauberg

Sara Stanley Wells

Robert Todd Harris

Rachel Elizabeth McLendon

Anne-Martine Sherbeck Jackson

Process for preparing copolyesters by introducing TPA, EG, and CHDM at an EG:TPA molar ratio of 2.3:1 to 2.7:1 into a reaction zone; reacting TPA with EG and CHDM at a temperature of at least 250&#xb0; C. and pressure of up to 40 psi to form a first esterification product; passing the first esterification product to a reaction zone; esterifying the first esterification product at a temperature of at least 250&#xb0; C. and pressure of up to 20 psi to form a second esterification product, passing the second esterification product to a reaction zone; polycondensing the second esterification product in the presence of a catalyst to form a prepolymerization product; passing the prepolymerization product to one or more reaction zones; and polycondensing the prepolymerization product in the presence of the catalyst to form a copolyester comprising 1.0 wt % or less of DEG, without requiring the use of DEG-suppressing additives.

Copolyester from terephthalic acid containing low diethylene glycol

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.

Method for incorporating nitrogen containing methine light absorbers in PET and compositions thereof

Method for incorporating nitrogen containing methine light absorbers in pet and compositions thereof

Disclosed are amber polyester compositions suitable for packaging food and beverages wherein the compositions significantly absorbs light of wavelengths shorter than about 550 nm which is achieved by a combination of several colorants, most of which are copolymerized into the polyester.

Amber polyester compositions for packaging food and beverages

This invention relates to an injection molding composition having a melt viscosity lower than about 2000 poise at 1500/sec. shear rate at a temperature of about 275.degree. C., and an excellent stiffness of at least 200,000 psi, comprising:

Polyester blends with improved processability

Disclosed is a polymer blend of a copolyesterether and an isotactic homopolymer of propylene, molded articles of which have improved impact strength.

Impact resistant polymer blends

Disclosed is a polymer blend having improved low-temperature impact strength comprising a copolyester of terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol, and a styrene-butadiene block copolymer.

Disclosed is a polymer blend of a copolyesterether and a styrene-butadiene copolymer, molded articles of which have improved impact strength.

Growing community of inventors

Kingsport, TN, United States of America

Dale Milton Blakely