Process for fast heat-up polyesters
AssigneeM&G USA Corporation
InventorsFreddie Lee Massey, George Aaron Deisz, Kevin Rollick, William C. Tung
Life of this patent
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Abstract
A thermoplastic composition, such as PET, contains an inert iron compound such as FeP, FeSi, or combinations thereof, having no chemical activity in the PET, with or without certain quantities of elemental metals, such as antimony, and a reducing agent or other stabilizer such as phosphite or phosphoric acid. A method for forming this composition is also disclosed. The composition may also optionally contain a color stabilizer, a DEG inhibitor and stress crack inhibiting agents.
Claims23
A composition of matter comprising at least 95 percent of a thermoplastic polymer, and from about 10 PPM to about 500 PPM, based on the weight of the polymer, of an inert iron compound having no chemical reactivity to the thermoplastic polymer selected from the group consisting of iron phosphides, iron silicides, or combinations thereof.
A composition of matter comprising at least 95 percent by weight of a thermoplastic polymer, an inert iron compound having no chemical reactivity with the thermoplastic polymer selected from the group consisting of iron phosphides, iron silicides, or combinations thereof, and a phosphorus stabilizer in either the trivalent or pentavalent state.
A blend of polyethylene terephthalate with one or more of FeP, Fe2P, Fe3P, and FeSi;
- an antimony catalyst;
- and a phosphite or a phosphate.
A preform, capable of being formed into a container, prepared from a composition of matter comprising:
- at least 95 percent by weight of a thermoplastic polymer;
- and
- from about 10 PPM to about 500 PPM of an inert iron` compound having no chemical reactivity to the thermoplastic polymer selected from the group consisting of iron phosphides, iron silicides and combinations thereof;
- wherein the preform has a faster heat up time than the heat up time for a preform made from composition of the same thermoplastic polymer but not including the inert iron compound having no chemical reactivity to the thermoplastic polymer.
Dependencies are inferred from the claim text.