Patent ID: 8545952

Claim:
A container comprising a polyester composition comprising: a polyester comprising a poly(ethylene terephthalate) based copolymer (PET copolymer) made using at least one first polycondensation catalyst selected from the group consisting of metals in groups 3, 4, 13, and 14 of the Periodic Table and comprising a catalyst residue remaining in the polyester from formation of the polyester, the catalyst residue comprising at least a portion of the at least one first polycondensation catalyst; and a reactive organic gas barrier enhancing additive, wherein the reactive organic gas barrier enhancing additive is a compound having the chemical formula R1OOC-AR—COOR2, wherein AR is selected from the group consisting of phenylene and naphthalene, and R1 and R2 are selected from the group consisting of C1 to C10 alkyl groups, a phenyl group, and a naphthyl group; and a polycondensation catalyst deactivating agent for reducing the reactivity of the catalyst residue with the polyester; wherein the polyester composition has an IV of 0.65 dL/g to 1.0 dL/g.