Patent Number: 6,762,276

Title: Hydrogenation of polyester oligomers containing terephthalic acid residues

Abstract: Disclosed is a process of hydrogenating a polyester oligomer containing terephthalic acid residues wherein terephthalic acid residues are converted to residues of 1,4-cyclohexanedicarboxylic acid. Also disclosed is a process for the preparation of polyesters containing 1,4-cyclohexanedicarboxylic acid residues by first hydrogenating a polyester oligomer containing terephthalic acid residues and then reacting the resulting oligomer with one or more polyester-forming reactants to produce a higher molecular weight polyester.

Inventors: Sumner, Jr.; Charles Edwan (Kingsport, TN), Gustafson; Bruce LeRoy (Kingsport, TN), Lin; Robert (Kingsport, TN)

Assignee: Eastman Chemical Company

International Classification: C08G 63/00 (20060101); C08G 63/199 (20060101); C08G 63/91 (20060101); B01J 23/40 (20060101); B01J 23/89 (20060101); C08G 063/78 (); C08J 003/00 ()

Expiration Date: 07/13/2021