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AssigneeExxonMobil Chemical Patents Inc.
InventorsSudhin Datta, Charles Cozewith, Periagaram Ravishankar, Edmund Stachowski
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Improved thermoplastic polymer blend compositions comprising an isotactic polypropylene component and an alpha-olefin and propylene copolymer component, said copolymer comprising crystallizable alpha-olefin sequences. In a preferred embodiment, improved thermoplastic polymer blends are provided comprising from about 35% to about 85% isotactic polypropylene and from about 30% to about 70% of an ethylene and propylene copolymer, wherein said copolymer comprises isotactically crystallizable propylene sequences and is predominately propylene. The resultant blends manifest unexpected compatibility characteristics, increased tensile strength, and improved process characteristics, e.g., a single melting point.
1-31. (canceled)
A blend composition comprising a crystalline polymer component and a crystallizable polymer component wherein:
A blend comprising at least one polymer (A) and at least one polymer (B), polymer (A) comprising about 60 wt % to about 98 wt % of the blend, and polymer (A) comprising from about 65 wt % to about 95 wt % of units derived from propylene and having units derived from ethylene and/or C6-C20 α-olefin, and polymer (A) is further characterized as comprising crystallizable propylene sequences, and polymer (B) comprises a substantially isotactic thermoplastic polymer other than polymer (A).
An article of manufacture made from a polymer blend comprising at least one polymer (A) and at least one polymer (B), polymer (A) comprising about 60 wt % to about 98 wt % of the blend, and polymer (A) comprising from about 65 wt % to about 95 wt % of units derived from propylene and having units derived from ethylene and/or C6-C20 α-olefin, and polymer (A) is further characterized as comprising crystallizable propylene sequences, and polymer (B) comprises a substantially isotactic thermoplastic polymer other than polymer (A).
A blend comprising at least one polymer (A) and at least one polymer (B), polymer (A) comprising about 60 wt % to about 98 wt % of the blend, and polymer (A) comprising from about 65 wt % to about 95 wt % of units derived from propylene and having units derived from ethylene and/or a C6-C20 α-olefin, and polymer (A) is further characterized as comprising crystallizable propylene sequences, and polymer (B) comprises a substantially isotactic thermoplastic polymer other than polymer (A), wherein polymer (A):
A blend comprising at least one polymer (A) and at least one polymer (B), polymer (A) comprising about 60 wt % to about 98 wt % of the blend, and polymer (A) comprising from about 65 wt % to about 95 wt % of units derived from propylene and having units derived from ethylene and/or a C6-C20 α-olefin, and polymer (A) has a heat of fusion <75 J/g and a Mooney viscosity (ML 1+4@ 125° C.) less than 100, and polymer (B) comprises a thermoplastic polymer other than polymer (A).
A blend comprising at least one polymer (A) and at least one polymer (B), polymer (A) comprising about 60 wt % to about 98 wt % of the blend, and wherein polymer (A) comprises from about 65 wt % to about 95 wt % of units derived from propylene and the balance units derived from ethylene and/or a C6-C20 α-olefin, and polymer (A) is further characterized as comprising crystallizable propylene sequences, and polymer (B) comprises a substantially isotactic polypropylene, wherein polymer (A):
Dependencies are inferred from the claim text.