| 摘要 |
The object of the invention is to provide a polyester composition that actively scavenges oxygen, with or without a transition metal catalyst. This was achieved by using a monomer selected from the group consisting of linear difunctional monomers having the general formula: X - (CH<SUB>2</SUB>)<SUB>n</SUB>-CH=CH-(CH<SUB>2</SUB>)<SUB>m</SUB> -X' wherein X and X' are each independently selected from the group consisting of OR and COOR, wherein R is selected from the group consisting of H and alkyl groups with one or more carbon atoms; and n and m are each independently 1 or more. The preferred monomer is 2-butene-l,4-diol (BEDO), and the preferred polyester is the reaction product of this diol with terephthalic acid to form poly(oxy-2-butene-l,4- diyloxycarbonyl-l,4-phenylenecarbonyl) - PBET. Copolymers of PBET are also within the scope of this invention. The polyester oxygen scavenging composition is then blended with conventional container resin such as polyesters, polyamides or polyolefins to make a container. |
