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US 2021/0230323 A1Published application
Polyethylene and Chlorinated Polyethylene Thereof
AssigneeLG Chem, Ltd.
InventorsSi Jung Lee, Sun Mi Kim, Cheolhwan Jeong, Yi Young Choi, Bog Ki Hong, Sunghyun Park
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Abstract
The polyethylene according to the present disclosure has a short relaxation time and a uniform particle size, thereby preparing a chlorinated polyethylene excellent in chlorination productivity and glass transition temperature by reacting with chlorine. And, a PVC composition with improved impact strength may also be prepared by including the same.
Claims20
A polyethylene satisfying the following conditions 1) to 4):
- 1) a relaxation time is 2 seconds or less,
- 2) a melt index MI5 (a melt index of the polyethylene measured at a temperature of 190° C. under a load of 5 kg in accordance with ASTM D 1238) is 0.75 g/10 min to 1.2 g/10 min,
- 3) a melt flow rate ratio (MFRR21.6/5, a value obtained by dividing the melt index measured at 190° C. under a load of 21.6 kg by the melt index measured at 190° C. under a load of 5 kg in accordance with ASTM D 1238) is 9.5 to 12.5, and
- 4) a density is 0.947 g/cm3 to 0.954 g/cm3.
1 more element
Dependencies are inferred from the claim text.