Abstract:
The present invention provides a process for producing a polyester from a polyester composition comprising at least about 1 wt. % wollastonite, based on the total weight of the polyester composition, wherein the wollastonite is added at a temperature of about 240° C. or less. The present invention further provides a process for producing a polyester from a polyester composition comprising at least about 1 wt. % wollastonite, based on the total weight of the polyester composition, and about 0.01 wt. % other filler, based on total weight of the polyester composition, wherein the wollastonite is added at a temperature of about 240° C. or less. The invention is further directed to polyester products produced by said process and the shaped articles formed therefrom.
Abstract:
This invention provides certain processes to produce polyester compositions, which incorporate certain carbon black materials. This invention further provides the polyester products produced and shaped articles formed therefrom. The processes allows for the lowest levels of certain carbon blacks while maintaining the desired product attributes, such as electrical properties. The low levels of carbon black incorporated further provides production, processing, and end use benefits through a lower product melt viscosity.