Abstract:
Crystallizable polyester compositions containing an aliphatic polyamide crystallization nucleator exhibit controllable and adjustable crystallization rates upon cooling from the melt and are thermoformable in melt to mold processes.
Abstract:
There is provided a process for increasing the yellowness of polyester polymer particles, preforms, bottles, and concentrates, containing a polyester polymer such as polyethylene terephthalate and copolymers by adding a yellow colorant and reheat agent particles comprising titanium, alloys of titanium, titanium nitride, titanium boride, titanium carbide, or combinations thereof to a melt phase polymerization process for making the polyester polymer to adding any one of the colorant or particles to a polyester polymer.