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US 12,552,884 B2Granted
Propylene-ethylene copolymer compositions suitable for hot fill packaging of foodstuffs
AssigneeW.R. Grace & Co.-Conn.
InventorsMatthew Fedec, Jan Van Egmond, Manu Rego, John Kaarto, Li-Min Tau
Life of this patent
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Abstract
A propylene-ethylene copolymer includes propylene as a primary monomer, an ethylene content (ET) of 3.0% to 5% by weight, a melt flow rate of from 20 to 45 g/10 min, a xylene soluble fraction (XS) of from 2.0% to 7.0% by weight, and an XS/ET ratio of less than or equal to 1.51.
Claims20
A propylene-ethylene copolymer comprising:
- propylene as a primary monomer;
- an ethylene content (ET) of 3.0% to 5% by weight;
- a melt flow rate of from 20 to 45 g/10 min;
- a xylene soluble fraction (XS) of from 2.0% to 7.0% by weight;
- and
- a xylene soluble fraction to ethylene content ratio (XS/ET) of less than or equal to 1.49.
3 more elements
A propylene-ethylene copolymer comprising:
- propylene as a primary monomer;
- an ethylene content (ET) of about 3.0% to about 5% by weight;
- a melt flow rate of from 20 to 45 g/10 min;
- a xylene soluble fraction (XS) of from 2.0% to 7.0% by weight;
- a molecular weight distribution greater than about 6.0 and
- a xylene soluble fraction to ethylene content
- a ratio (XS/ET) of less than or equal to 1.51.
4 more elements
Dependencies are inferred from the claim text.