Ethylene-based polymer compositions with improved viscosities
AssigneeDow Global Technologies LLC
InventorsBrian W. Walther, Timothy E. Clayfield, Curvel Hypolite
Life of this patent
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Abstract
The invention provides a composition comprising a first composition comprising the following: A) a first ethylene/α-olefin interpolymer that has a weight average molecular weight (Mw) greater than 90,000 g/mole and a MWD less than, or equal to 3, each as determined by conventional GPC; B) a second ethylene/α-olefin interpolymer; and wherein the first composition has a number average molecular weight (Mn) less than 10,000 g/mole, as determined by conventional GPC; and wherein the α-olefin of first interpolymer is the same as the α-olefin of the second interpolymer.
Claims12
A composition comprising a first composition comprising the following:
- A) a first ethylene/propylene/non-conjugated diene interpolymer (EPDM(1)) that has a weight average molecular weight (Mw) greater than 90,000 g/mole and a MWD from 2.12 to 2.29, each as determined by conventional GPC;
- B) a second ethylene/propylene/non-conjugated diene interpolymer (EPDM(2)) that has a weight average molecular weight (Mw) less than, or equal to, 4000 g/mole and a MWD from 1.95 to 2.29;
- and
- wherein the first composition has a number average molecular weight (Mn) less than 10,000 g/mole as determined by conventional GPC;
- and
- wherein the weight ratio of the component A) to the component B) is from 8/2 to 1/1;
- and
- wherein the first composition has a weight average molecular weight (Mw) greater than, or equal to, 100,000 g/mole;
- and
- wherein the first composition has a density from 0.855 g/cc to 0.910 g/cc, and a melt index (I2) less than, or equal to, 10 g/10 min;
- and
- wherein the weight ratio of the ethylene content in the second ethylene/propylene/non-conjugated diene interpolymer to the ethylene content in the first ethylene/propylene/non-conjugated diene interpolymer (EE(2)/EE(1)) is from 0.90 to 1.10, and wherein the absolute difference in the propylene content of the first ethylene/propylene/non-conjugated diene interpolymer and the second ethylene/propylene/non-conjugated diene interpolymer is less than 5 weight percent, wherein each weight percent is based on the weight of the respective interpolymer;
- and
- wherein the first composition has a MWD greater than, or equal to, 50, and less than, or equal to, 200.
Dependencies are inferred from the claim text.