Process for producing pet articles with low acetaldehyde

Abstract

The present invention discloses a process for producing molded, shaped or extruded articles comprising the steps of: a) melt reacting, in the presence of a catalyst which is substantially free of Co compounds, at least one glycol and at least one dicarboxylic acid to form a polyester having an I.V. of at least about 0.5 dL/g, wherein said at least one glycol is selected from the group consisting of glycols having up to 10 carbon atoms and mixtures thereof and said dicarboxylic is selected from the group consisting of alkyl dicarboxylic acids having 2 to 16 carbon atoms, aryl dicarboxylic acids having 8 to 16 carbon atoms and mixtures thereof; b) adding an acetaldehyde reducing additive to said polyester to form a reduced acetaldehyde polyester; and c) forming said reduced acetaldehyde polyester into articles directly from step b. Thus, the present invention provides a process for directly producing from the melt article having extremely low acetaldehyde content.

Dependencies are inferred from the claim text.