Abstract: The present invention relates to a reactor-grade copolyester composition having radio-frequency sealing capability. The present invention further relates to films and thermoformable packaging prepared from the reactor-grade copolyester composition and the methods for making such films and articles therefrom.

Abstract: Objects can be produced using an additive manufacturing process. The objects can include a plurality of layers of a polymeric material that includes a copolyester ether. The copolyester ether can include units of a diacid component and units of a glycol component. In some implementations, the units of the diacid component can be derived from at least one aliphatic dicarboxylic acid. Further, in some illustrative examples, the units of the glycol component can be derived from an aliphatic glycol and a polyalkylene ether glycol. In some cases, the polymeric material can also include a thermoplastic elastomer and a resin component.

Abstract: A process for making an infusible polyolefin includes the steps of: a) contacting the polyolefin in a sulfonation reactor with a sulfonation mixture comprising sulfur trioxide to produce the infusible polyolefin; b) recovering from the sulfonation reactor a recovery stream having sulfur dioxide; c) oxidizing at least a portion of the recovered sulfur dioxide to produce a recycle stream; and d) combining at least a portion of the recycle stream with the sulfonation mixture of step (a). Another aspect of the invention is for making a carbonized fiber from an infusible polyolefin of the present invention and further includes the step of carbonizing the infusible polyolefin to produce a carbon fiber. Another aspect of the invention is an apparatus for preparing an infusible polyolefin. The apparatus includes a plurality of compartments in fluid communication wherein at least one compartment is adapted for contacting a polyolefin with sulfur trioxide.

Abstract: The present invention relates to a reactor-grade copolyester composition having radio-frequency sealing capability. The present invention further relates to films and thermoformable packaging prepared from the reactor-grade copolyester composition and the methods for making such films and articles therefrom.

Abstract: The present invention relates to a reactor-grade copolyester composition having radio-frequency sealing capability. The present invention further relates to films and thermoformable packaging prepared from the reactor-grade copolyester composition.