Manganese polymers and catalysts for plastic articles
AssigneePlastipak Packaging, Inc.
InventorsMiguel Vieira, Aditi Bhattacharyya Ghosh
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Abstract
A barrier for polymer or plastic molding, such as injection molding, includes a manganese (Mn) catalyst and an oxygen barrier. In embodiments, the Mn catalyst may comprise from 50 ppm Mn to 350 ppm Mn. In embodiments the oxygen barrier may include MXD6. Such barriers may be included with a polymer to form a composition used in a molding (e.g., injection) process. In embodiments, a barrier includes a transition metal catalyst, an organic compound, and a radical initiator. Plastic preforms and containers that are molded with such barriers/compositions are also disclosed.
Claims20
A barrier for molding a polymer, the barrier comprising:
- a manganese (Mn) catalyst comprising from 50 ppm Mn to 350 ppm Mn;
- and
- an oxygen barrier.
A barrier for plastic molding, the barrier comprising:
- a transition metal catalyst comprising from 50 ppm Mn to 350 ppm Mn;
- an organic compound;
- and
- a radical initiator.
A copolymer, comprising:
- polyethylene terephthalate (PET);
- manganese (Mn) comprising from 50 ppm Mn to 350 ppm Mn;
- and
- an oxygen barrier.
A multilayer article, comprising:
- a catalyst including a range of Mn from 2.5 ppm Mn to 350 ppm Mn;
- a nylon-free scavenger;
- and
- PET and/or recycled PET (RPET).
A multilayer container, comprising:
- a neck portion, and
- a body portion, the body portion comprising:
- an inner polymer layer comprising PET;
- an intermediate layer of at least 15% by weight of the container, comprising:
- a catalyst including a range of Mn from 50 ppm Mn to 350 ppm Mn;
- a nylon-free oxygen scavenger comprising at least 5% by weight of the intermediate layer;
- and
- PET comprising at least some portion of recycled PET (RPET);
- and
- an outer polymer layer comprising PET;
- wherein the container has a haze factor of less than 5% and a sealed container has an oxygen ingress of about 0 ppm for at least 50 days.
Dependencies are inferred from the claim text.