A polymer composition is disclosed for containers for beverages, films and
sheets for food. The composition comprises (a) polyester, (b) an
acetaldehyde scavenger, (c) an acid absorber, and (d) an antioxidant. The
acetaldehyde scavenger is characterized as small molecules, such as
anthranilamide, that include at least two hydrogen-substituted
heteroatoms bonded to carbons of the organic additive compound such that
the organic additive compound is reactive with acetaldehyde in the
polyester to form water and a resulting organic compound comprising an
unbridged 5- or 6-member ring including the at least two heteroatoms. The
acid absorber is a hydrotalcite-like composition. The polymer compound
can be concentrated in a masterbatch or fully let-down. Optional
ingredients include colorants, and optical brighteners. Discoloration of
the polyester is reduced during the performance of acetaldehyde
scavenging.