| abstract |
The invention is directed to an oxygen sweeping additive system for polymers, the additive system comprises an oxidizable polymer, a transition metal catalyst and a trimethylolpropane fatty acid ester, wherein the fatty acid is a fatty acid. from C6 to C18 having a linear or branched chain, to polyester compositions containing the additive and to containers, or preforms for containers, prepared from the polyester composition. |