Ethylene alpha-olefin copolymers and methods
AssigneeEquistar Chemicals, LP
InventorsHarilaos Mavridis, Roberta Pica, Pietro Baita, Gabriele Mei, Massimo Covezzi
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Abstract
The present disclosure generally relates to ethylene alpha-olefin copolymers and methods of making ethylene alpha-olefin copolymers. The ethylene alpha-olefin copolymers may have a density of about 0.915 g/mL to about 0.918 g/mL, a rheological polydispersity index greater than 0.8, a melt index of about 0.4 dg/10 min to about 2.0 dg/10 min, and/or a CEF T50 of 84° C. or less. The ethylene alpha-olefin copolymers may be made by combining an ethylene monomer and one or more alpha-olefin monomers in the presence of a catalyst, such as a Ziegler-Natta catalyst.
Claims20
An ethylene alpha-olefin copolymer comprising:
- an ethylene monomer;
- and
- an alpha-olefin monomer;
- wherein the ethylene alpha-olefin copolymer comprises—
- (i) a density of about 0.915 g/mL to about 0.918 g/mL,
- (ii) a rheological polydispersity index greater than 0.8,
- (iii) a melt index of about 0.4 dg/10 min to about 2.0 dg/10 min, and
- (iv) a CEF T50 of 84° C. or less.
A method of producing an ethylene alpha-olefin copolymer comprising:
- contacting an ethylene monomer and one or more alpha-olefin monomers in the presence of a Ziegler-Natta catalyst to produce the ethylene alpha-olefin copolymer;
- wherein the ethylene alpha-olefin copolymer has—
- (i) a density of about 0.915 g/mL to about 0.918 g/mL,
- (ii) a rheological polydispersity index greater than 0.8,
- (iii) a melt index of about 0.4 dg/10 min to about 2.0 dg/10 min, and
- (iv) a CEF T50 of 84° C. or less.
Dependencies are inferred from the claim text.