Diene-modified propylene copolymers
AssigneeExxonMobil Chemical Patents Inc.
InventorPalanisamy Arjunan
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Abstract
Certain specific embodiments of the inventions will now be discussed. For example, a process of preparing a copolymer composition that includes a diene-modified polypropylene copolymer is described, which process includes: contacting a metallocene catalyst compound with a polymerization medium that includes at least a propylene monomer and an α, internal non-conjugated diene monomer; and conducting polymerization of the monomers in the presence of the metallocene catalyst compound for a time sufficient to provide a diene-modified polypropylene random copolymer that includes monomeric units derived from each of the monomers, and having from 0.0 wt % to 2.0 wt % ethylene and a heat of fusion of 25 J/g or more.
Claims49
A process of preparing a copolymer composition that includes a diene-modified propylene random copolymer, comprising:
- contacting a metallocene catalyst compound with a polymerization medium that includes at least a propylene monomer and an α, internal non-conjugated diene monomer;
- and
- conducting polymerization of the monomers in the presence of the metallocene catalyst compound for a time sufficient to provide a diene-modified polypropylene random copolymer that includes monomeric units derived from each of the monomers, and having from 0.0 wt % to 2.0 wt % ethylene and a heat of fusion of 30 J/g or more.
A process of preparing a polymer composition that includes a diene-modified propylene random copolymer, comprising:
- contacting a metallocene catalyst compound having at least two indenyl rings or derivatives of indenyl rings, each ring being substituted at the 2 and/or 4 positions, with a polymerization medium that includes at least a propylene monomer and an α, internal non-conjugated diene monomer that has an internal double bond comprising a di-substituted vinyl group or a tri-substituted vinyl group;
- and
- conducting polymerization of the monomers in the presence of the metallocene catalyst compound for a time sufficient to provide a diene-modified polypropylene random copolymer that includes monomeric units derived from each of the monomers, and having from 0.0 wt % to 2.0 wt % ethylene and a heat of fusion of 30 J/g or more.
A copolymer composition comprising a diene-modified polypropylene random copolymer having propylene units;
- diene units derived from α, internal non-conjugated diene monomers;
- from 0.0 wt % to 20 wt % ethylene units;
- and a heat fusion of 25 J/g or more.
Dependencies are inferred from the claim text.