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US 11,718,737 B2Granted
Ethylene/alpha-olefin copolymer and method for preparing the same
AssigneeLG Chem, Ltd.
InventorsJung Ho Jun, Seung Hwan Jung, Jin Sam Gong, Rae Keun Gwak, Choong Hoon Lee, Eun Jung Lee, Hyun Jin Ju, In Sung Park, Sang Eun Park
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Abstract
The present invention provides an ethylene/alpha-olefin copolymer having narrow molecular weight distribution together with a low density and an ultra low molecular weight, minimized number of unsaturated functional groups, and particularly a small amount of vinylidene among the unsaturated functional groups to show excellent physical properties, and a method for preparing the same.
Claims17
An ethylene/alpha-olefin copolymer satisfying the following conditions i) to iv):
- i) a viscosity:
- 6,000 cP to 40,000 cP, when measured at a temperature of 180° C.,
- ii) a molecular weight distribution (MWD):
- 1.5 to 3.0,
- iii) a total number of unsaturated functional groups per 1000 carbon atoms:
- 0.8 or less, and 0.2 or more, and iv) a Rvdvalue according to the following Mathematical Equation 1:
- 0.3 or less:
- R
- vd
- =
- [
- vinylidene
- ]
- [
- vinyl
- ]
- +
- [
- vinylene
- ]
- +
- [
- vinylidene
- ]
- [
- Mathematical
-
-
- Equation
-
-
- 1
- ]
- in Mathematical Equation 1, the vinyl, vinylene and vinylidene mean the number of each functional group per 1000 carbon atoms, measured through nuclear magnetic spectroscopic analysis.
31 more elements
Dependencies are inferred from the claim text.