Back to results
US 2019/0194370 A1Published application
Polyolefin Compositions
AssigneeExxonMobil Chemical Patents Inc.
InventorsAndy H. Tsou, Narayanaswami Dharmarajan, Crisita Carmen H. Atienza, Jian Yang
Life of this patent
Estimating the term…
Abstract
A composition comprising vinyl-terminated polyethylene having an Mn from about 200 g/mol to about 10,000 g/mol; and a comb polyolefin having polyethylene arms attached to a random copolymer backbone, said backbone including units derived from an alpha-olefin having 3 or more carbon atoms, where the polyethylene arms have an Mn from about 200 g/mol to about 10,000 g/mol, and where the comb polyolefin has an Mp from about 7,500 to about 400,000 g/mol.
Claims20
A composition comprising:
- (i) vinyl-terminated polyethylene having an Mn from about 200 g/mol to about 10,000 g/mol;
- and
- (ii) a comb polyolefin having polyethylene arms attached to a random copolymer backbone, said backbone including units derived from an alpha-olefin having 3 or more carbon atoms, where the polyethylene arms have an Mn from about 200 g/mol to about 10,000 g/mol, and where the comb polyolefin has an Mp from about 7,500 to about 400,000 g/mol.
A method of preparing a composition, the method comprising:
- (i) polymerizing ethylene using a first catalyst system that is preferential for the polymerization of ethylene to thereby form vinyl-terminated polyethylene;
- and
- (ii) copolymerizing alpha-olefin having 3 or more carbon atoms, ethylene, and vinyl-terminated polyethylene using a second catalyst system that is preferential for the copolymerization of the vinyl-terminated polyethylene with alpha-olefin monomer having 3 or more carbon atoms to thereby produce comb polyolefin.
Dependencies are inferred from the claim text.