Low density ethylene-based polymers with high melt strength
US-9394389-B2 · Jul 19, 2016 · US
Low density ethylene-based polymer compositions with high melt strength and mid-high density control
US9828496B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9828496-B2 |
| Application number | US-201414889221-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 21, 2014 |
| Priority date | May 22, 2013 |
| Publication date | Nov 28, 2017 |
| Grant date | Nov 28, 2017 |
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Abstract
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The invention provides a composition comprising a first ethylene-based polymer, formed by a high pressure, free-radical polymerization process, and a second ethylene-based polymer, formed by a high pressure, free-radical polymerization process, such composition comprising the following properties: a) a melt index (12) from 2.0 to 10 dg/min; b) a density from 0.922 to 0.935 g/cc; and wherein the second ethylene-based polymer is present in an amount from 60 to 95 weight percent, based on the sum of the weight of the first polymer and the second polymer; and wherein the second ethylene-based polymer has a density greater than, or equal to, 0.924 g/cc; and wherein the first ethylene-based polymer has a melt index less than 2.5 dg/min.
First claim
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The invention claimed is: 1. A composition comprising a first ethylene-based polymer, formed by a high pressure, free-radical polymerization process, and a second ethylene-based polymer, formed by a high pressure, free-radical polymerization process, such composition comprising the following properties: a) a melt index (I2) from 2.0 to 10 dg/min; b) a density from 0.922 to 0.935 g/cc; and wherein the second ethylene-based polymer is present in an amount from 60 to 95 weight percent, based on the sum of the weight of the first ethylene-based polymer and the second ethylene-based polymer; and wherein the second ethylene-based polymer has a density greater than, or equal to, 0.924 g/cc; and wherein the first ethylene-based polymer has a melt index less than 1.5 dg/min. 2. The composition of claim 1 , wherein the first ethylene-based polymer has a Melt Strength greater than, or equal to, 15 cN. 3. The composition of claim 1 , wherein the second ethylene-based polymer has a melt index from 2.0 to 50 dg/min. 4. The composition of claim 1 , wherein the second ethylene-based polymer has a melt index from 3.0 to 30 dg/min. 5. The composition of claim 1 , wherein the composition has a hexane extractable content less than 5.5 wt %. 6. The composition of claim 1 , wherein the composition has a hexane extractable content less than 2.6 wt %. 7. The composition of claim 1 , wherein the first ethylene-based polymer and the second ethylene-based polymer each independently has a hexane extractable content less than, or equal to, 2.6 wt %. 8. The composition of claim 1 , wherein each polymer component of the composition independently has a hexane extractable content less than, or equal to, 2.6 wt %. 9. An article comprising at least one component formed from the composition of claim 1 . 10. The article of claim 9 , wherein the article is a coating, a film, a foam, a laminate, a fiber, or a tape. 11. A method for forming the composition of claim 1 , said method comprising mixing the first ethylene-based polymer and the second ethylene-based polymer. 12. A method for forming the composition of claim 1 , said method comprising separately feeding the first ethylene-based polymer and the second ethylene-based polymer into an extrusion system.
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Classifications
Polyethylene · CPC title
used for films · CPC title
characterized by the use of several polymeric components · CPC title
- C08L23/06Primary
Polyethylene · CPC title
containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title
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- What does patent US9828496B2 cover?
- The invention provides a composition comprising a first ethylene-based polymer, formed by a high pressure, free-radical polymerization process, and a second ethylene-based polymer, formed by a high pressure, free-radical polymerization process, such composition comprising the following properties: a) a melt index (12) from 2.0 to 10 dg/min; b) a density from 0.922 to 0.935 g/cc; and wherein the…
- Who is the assignee on this patent?
- Dow Global Technologies Llc
- What technology area does this patent fall under?
- Primary CPC classification C08L23/06. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 28 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).