Long chain branched EPDM compositions and processes for production thereof
US-8962761-B2 · Feb 24, 2015 · US
Elastic terpolymer including diene group and preparation method thereof
US9410008B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9410008-B2 |
| Application number | US-201314437419-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 14, 2013 |
| Priority date | Jul 22, 2013 |
| Publication date | Aug 9, 2016 |
| Grant date | Aug 9, 2016 |
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- Title
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Abstract
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The present invention relates to an elastic terpolymer which can satisfy excellent processability and elasticity (flexibility) at the same time, and a preparation method thereof. The elastic terpolymer is a copolymer of 40 to 70 weight % of ethylene, 15 to 55 weight % of a C 3 -C 20 alpha-olefin, and 0.5 to 20 weight % of a diene obtained in the presence of a group 4 transition metal catalyst, of which i) the weight average molecular weight measured by GPC is 100,000 to 500,000, and ii) the Mooney viscosity (ML) and the Mooney relaxation area (MLR) measured by a Mooney viscometer (1+4+2 {circle around (a)}125° C.) can satisfy a specific relation.
First claim
Opening claim text (preview).
The invention claimed is: 1. An elastic terpolymer of 50.2 to 66.3 weight % of ethylene, 21.9 to 44.7 weight % of propylene, and 4.6 to 12.3 weight % of 5-ethylidene-2-norbornene obtained in the presence of a group 4 transition metal catalyst, of which i) the weight average molecular weight measured by GPC is 100,000 to 500,000, and ii) the Mooney viscosity (ML) and the Mooney relaxation area (MLR) measured by a Mooney viscometer (1+4+2{circle around (a)}125 ° C.) satisfy the following General Equation 1: 11.2 ≦[MLR /( ML ) 2 ]*100≦16.0. [General Equation 1] 2. The elastic terpolymer according to claim 1 , wherein a ratio of MLR/ML is 3 or more. 3. The elastic terpolymer according to claim 1 , wherein the Mooney viscosity is 20 MU or more. 4. The elastic terpolymer according to claim 1 , having density of 0.840 to 0.895 g/cm 3 . 5. The elastic terpolymer according to claim 1 , having a molecular weight distribution of 2 to 4.
Assignees
Inventors
Classifications
- C08F236/20Primary
unconjugated · CPC title
- C08F210/18Primary
with non-conjugated dienes, e.g. EPT rubbers · CPC title
Isotactic · CPC title
Low density, i.e. < 0.91 g/cm3 · CPC title
Narrow molecular weight distribution, i.e. Mw/Mn < 3 · CPC title
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- What does patent US9410008B2 cover?
- The present invention relates to an elastic terpolymer which can satisfy excellent processability and elasticity (flexibility) at the same time, and a preparation method thereof. The elastic terpolymer is a copolymer of 40 to 70 weight % of ethylene, 15 to 55 weight % of a C 3 -C 20 alpha-olefin, and 0.5 to 20 weight % of a diene obtained in the presence of a group 4 transition metal catalyst,…
- Who is the assignee on this patent?
- Lg Chemical Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08F236/20. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 09 2016 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).