FIELD: chemistry.
SUBSTANCE: method includes charging a reactor for the gas-phase polymerization catalytic system, which includes hafnocene on a substrate containing pores saturated with the selected liquid hydrocarbon containing at least 12 carbon atoms and an activating reagent. Then, ethylene and alpha-olefin are reacted with metallocene on a substrate in the gas-phase polymerization reactor to obtain an ethylene/alpha-olefin copolymer. The copolymer has a density of less than 0.93 g/cm3, the melt index (I2) - less than 2 dg/min, the ratio of melt indexes (I21/I2) - not less than 28.
EFFECT: improving the activity of the catalyst to produce polymers with improved characteristics.
14 cl, 2 tbl, 4 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF POLYMERISATION WITH APPLICATION OF METALLOCENE CATALYTIC SYSTEMS | 2004 |
|
RU2360930C2 |
| GAS-PHASE POLYMERIZATION PROCESS | 2003 |
|
RU2297427C2 |
| METHOD OF PREPARING BIMODAL POLYOLEFIN AND FILMS BASED THEREON | 2003 |
|
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| ETHYLENE AND ALPHA-OLEFIN COPOLYMERS AND POLYMERISATION METHODS FOR OBTAINING SAID COPOLYMERS | 2007 |
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| CATALYST COMPOSITION, METHODS OF PRODUCING AND USING IN POLYMERISATION METHOD | 2015 |
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| METHODS OF REGULATING POLYMER PROPERTIES | 2008 |
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| CATALYTIC COMPOSITION, METHODS FOR ITS PREPARATION AND APPLICATION IN THE METHOD OF POLYMERIZATION | 2015 |
|
RU2745066C1 |
| IMPROVED POLYMERISATION METHODS USING METALLOCENE CATALYSTS, POLYMER PRODUCTS AND USE THEREOF | 2007 |
|
RU2446179C2 |
| METHODS FOR PRODUCTION OF POLYMERS WITH CONTROLLED COMPOSITION DISTRIBUTION | 2005 |
|
RU2356912C2 |
| METHODS OF MODIFYING THE MELT FLOW RATIO AND/OR SWELL OF POLYETHYLENE RESINS | 2015 |
|
RU2685268C2 |
