A mixture of a polyester or a polyamide, such as poly(ethylene
terephthalate) PET, and a suitable stabilizer selected from the group
consisting of certain Mannich base compounds, when extrusion compounded
exhibits a lower residual acetaldehyde content than does PET or polyamide
alone when similarly treated. The invention pertains to any polyester or
polyamide used in the manufacture of molded articles, fibers, or films,
for instance bottles or containers which are used to store consumer
materials, for example food, beverages and water.
