Loading patent…
AssigneeDow Global Technologies LLC
InventorsColin Li Pi Shan, Lonnie G. Hazlitt, Yunwa Wilson Cheung, Benjamin C. Poon, Phillip D. Hustad, Roger L. Kuhlman, Edmund M. Carnahan, XiaoHua Qiu, Angela N. Taha
Estimating the term…
Embodiments of the invention provide a class of propylene/α-olefin block interpolymers. The propylene/α-olefin interpolymers are characterized by an average block index, ABI, which is greater than zero and up to about 1.0 and a molecular weight distribution, Mw/Mn, greater than about 1.3. Preferably, the block index is from about 0.2 to about 1. In addition or alternatively, the block propylene/α-olefin interpolymer is characterized by having at least one fraction obtained by Temperature Rising Elution Fractionation (“TREF”), wherein the fraction has a block index greater than about 0.3 and up to about 1.0 and the propylene/α-olefin interpolymer has a molecular weight distribution, Mw/Mn, greater than about 1.3.
A propylene/α-olefin interpolymer comprising (i) a majority mole fraction of polymerized units of propylene and (ii) an α-olefin, wherein the interpolymer is a block interpolymer and is characterized by an average block index in the range from about 0.4 to about 1.0, a molecular weight distribution, Mw/Mn, greater than 2.6, and as having one and only one melting point, Tm.
A propylene/α-olefin interpolymer comprising (i) a majority mole fraction of polymerized units of propylene and (ii) an α-olefin, the interpolymer characterized by (i) having at least one fraction obtained by Temperature Rising Elution Fractionation (“TREF”), wherein the fraction has a block index greater than about 0.3 and up to about 1.0, (ii) a molecular weight distribution, Mw/Mn, greater than about 2.6, and (iii) having one and only one melting point, Tm.
The propylene/α-olefin interpolymer comprising (i) a majority mole fraction of polymerized units of propylene and (ii) an α-olefin, wherein the interpolymer is a block interpolymer and is characterized by an average block index in the range from about 0.4 to about 1.0 and a molecular weight distribution, Mw/Mn, greater than about 1.3 and wherein the propylene/α-olefin interpolymer is characterized as having one and only one melting point, Tm.
Dependencies are inferred from the claim text.