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Title:
ETHYLENE POLYMER AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/161402
Kind Code:
A1
Abstract:
The present invention relates to an ethylene polymer and a preparation method therefor. The ethylene polymer has an average particle size of 50-3,000 μm, a bulk density of 0.28-0.55 g/cm3, a true density of 0.930-0.980 g/cm3, a melt index of 0.01-2,500 g/10min at 190°C under the load of 2.16 Kg, a degree of crystallinity of 30-90%, and a melting point of 105-147°C; and a comonomer has a molar insertion rate of 0.01-5 mol%, a weight average molecular weight of 20 thousand g/mole to 400 thousand g/mole, and a molecular weight distribution of 1.8-10. The preparation method comprises: using an alkane solvent having a boiling point of 5-55°C or a mixed alkane solvent having the saturated vapor pressure of 20-150 KPa at 20°C as a polymerization solvent; and under the presence of a polyethylene catalytic system, and under the conditions that a molar ratio of hydrogen to ethylene is 0.01-20:1, preferably 0.015-10:1, and a molar ratio of hydrogen to a comonomer is 0.1-30:1, preferably 0.15-25:1, performing kettle-type slurry polymerization on raw materials comprising ethylene, hydrogen, and the comonomer, so as to prepare an ethylene polymer.

Inventors:
LI CHUANFENG (CN)
WANG WENRUI (CN)
JING KUN (CN)
XING YUEJUN (CN)
XIA HUIMIN (CN)
CHEN MINGHUA (CN)
YOU ZHONGLIN (CN)
CHEN SHAOHUI (CN)
ZHAI JIANHONG (CN)
GUO FENG (CN)
YANG LIU (CN)
MEI LI (CN)
Application Number:
PCT/CN2022/074017
Publication Date:
August 04, 2022
Filing Date:
January 26, 2022
Export Citation:
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Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
SINOPEC YANGZI PETROCHEMICAL CO LTD (CN)
International Classes:
C08F2/01; C08F4/646; C08F210/16
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Attorney, Agent or Firm:
CHINA PATENT AGENT (H.K.) LTD. (CN)
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