Ethylenic polymer and its use
AssigneeDow Global Technologies LLC
InventorsRajen M. Patel, Robert N. Cotton, Sharon Baker, Pradeep Jain, Jian Wang, Jeffrey A. Sims, Tianzi Huang, Matthew Lehr
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Abstract
New ethylene polymers having low levels of long chain branching are disclosed. Films and film layers made form these polymers have good hot tack strength over a wide range of temperatures, making them good materials for packaging applications.
Claims8
A composition comprising an ethylene/α-olefin copolymer that is an ethylene/octene copolymer comprising:
- an overall polymer density from 0.897 g/cc to 0.900 g/cc;
- a GI200 gel rating of not more than 15;
- an I10/I2 (measured at 190° C.) from 5.8 to 6.5;
- a zero shear viscosity (ZSV) ratio from 1.3 to 2.3;
- an Mw/Mn from 2.0 to 2.4;
- a g′(HMW)/g′(LMW) of greater than 0.95;
- and
- the ethylene/α-olefin copolymer has a DSC melting point defined by the relationship,
- Tm (° C.)≤(−7914.1*(density)2)+(15301*density)−7262.4, where density is in g/cc;
- and
- at least one other natural or synthetic polymer.
A composition comprising an ethylene/α-olefin copolymer that is an ethylene/octene copolymer comprising:
- an overall polymer density from 0.897 g/cc to 0.900 g/cc;
- a GI1200 gel rating of not more than 15;
- an I10/I2 (measured at 190° C.) from 5.8 to 6.5;
- a zero shear viscosity (ZSV) ratio from 1.3 to 2.3;
- an Mw/Mn from 2.0 to 2.4;
- a g′(HMW)/g′(LMW) of greater than 0.95;
- and
- the ethylene/α-olefin copolymer has a DSC melting point defined by the relationship,
- Tm (° C.)≤(−7914.1*(density))+(15301*density)−7262.4, where density is in g/cc;
- wherein at least a portion of the ethylene/α-olefin copolymer has been cross-linked.
A composition comprising an ethylene/α-olefin copolymer that is an ethylene/octene copolymer comprising:
- an overall polymer density from 0.897 g/cc to 0.900 g/cc;
- a GI200 gel rating of not more than 15;
- an I10/I2 (measured at 190° C.) from 5.8 to 6.5;
- a zero shear viscosity (ZSV) ratio from 1.3 to 2.3;
- an Mw/Mn from 2.0 to 2.4;
- a g′(HMW)/g′(LMW) of greater than 0.95;
- and
- the ethylene/α-olefin copolymer has a DSC melting point defined by the relationship,
- Tm (° C.)≤(−7914.1*(density)2)+(15301*density)−7262.4, where density is in g/cc;
- wherein at least a portion of the ethylenic polymer has been functionalized.
Dependencies are inferred from the claim text.