A melt phase process for making a polyester polymer melt phase product by
adding an antimony containing catalyst to the melt phase, polycondensing
the melt containing said catalyst in the melt phase until the It.V. of
the melt reaches at least 0.75 dL/g. Polyester polymer melt phase pellets
containing antimony residues and having an It.V. of at least 0.75 dL/g
are obtained without solid state polymerization. The polyester polymer
pellets containing antimony residues and having an It.V. of at least 0.70
dL/g obtained without increasing the molecular weight of the melt phase
product by solid state polymerization are fed to an extruder, melted to
produce a molten polyester polymer, and extruded through a die to form
shaped articles. The melt phase products and articles made thereby have
low b* color and/or high L* brightness, and the reaction time to make the
melt phase products is short.