FIELD: polymer production and catalysts.
SUBSTANCE: proposed method comprises contacting monomers with deposited bimetallic catalytic composition over a period of time long enough to obtain bimodal polyolefin composition, which includes high-molecular weight polyolefin component and low-molecular weight polyolefin component, wherein deposited bimetallic catalyst includes first catalyst component, which is preferably non-metallocene, and second catalyst component, which includes metallocene catalytically active substance containing at least one fluoride or fluorine-containing leaving group, wherein bimetallic catalyst is supported by improved silica dehydrated at temperature above 800°C.
EFFECT: increased activity and productivity of catalyst.
16 cl, 2 tbl, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| GAS-PHASE POLYMERIZATION PROCESS | 2003 |
|
RU2297427C2 |
| METHOD OF POLYMERISATION WITH APPLICATION OF METALLOCENE CATALYTIC SYSTEMS | 2004 |
|
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| METHOD OF CONTROLLING BIMODAL CATALYST ACTIVITY DURING POLYMERISATION | 2008 |
|
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| INCREASED RATIO OF MELT INDEXES FOR POLYMER BY LOADING CATALYST ON SUBSTRATE SATURATED BY SELECTED LIQUID AGENT | 2013 |
|
RU2645216C2 |
| POLYETHYLENE COMPOSITIONS WITH IMPROVED BREAKING CHARACTERISTICS | 2004 |
|
RU2349613C2 |
| METALLOCENE CATALYSTS AND USE THEREOF IN POLYMERISATION PROCESSES | 2008 |
|
RU2455316C2 |
| METALLOCENE COMPOUND, CATALYST COMPOSITION INCLUDING IT AND METHOD OF OLEFIN POLYMERISATION, APPLYING IT | 2012 |
|
RU2510646C2 |
| POLYMERIZATION PROCESS | 2001 |
|
RU2258712C2 |
| CATALYSTS FOR OBTAINING BIMODAL RESIN BASED ON COMBINED ORGANIC CHROME COMPOUND AND METALLOCENE | 2004 |
|
RU2355709C2 |
| POLYETHYLENE RESIN | 2015 |
|
RU2690371C2 |
