FIELD: polymerization processes and catalysts.
SUBSTANCE: invention relates to creation of polar media-resistant high-activity catalysts allowing production of linear, high-crystallinity, high- and ultrahigh-molecular weight polyethylenes. Catalyst according to invention is binary bridged bis(phenoxy-imine) titanium complex of general formula: 
, in which R1 is cumyl or isobornyl and R is methyl or cumyl. Preparation of catalyst consists in reaction of diimine ligand with a transition metal compound, said diimine ligand being prepared from following components: 4,4'-diaminodiphenylmethane and methyl-or cumyl-derivatives of 3-cumyl- or 3-isobornylsalycilic aldehyde, and said transition metal compound being, in particular, titanium diisopropoxytitanium dichloride: TiCl2(OPr)2. Polymerization of ethylene is effected in hydrocarbon solvent in presence of above-defined catalyst at ethylene pressure 0.1-0.8 MPa and 30-80°C, using, for example, methylalumoxane as cocatalyst. Melting point of produced polyethylene is at least 141-143°C.
EFFECT: enabled production of linear polyethylenes with high- and ultrahigh-molecular weight and elevated melting point owing to use of high-activity homogenous catalysts.
2 cl, 1 tbl, 13 ex
| Title | Year | Author | Number |
|---|---|---|---|
| CATALYST BASED ON BRIDGE BIS(PHENOXIMINE) COMPLEX, METHOD OF ITS PREPARATION AND PROCESS OF ETHYLENE POLYMERISATION APPLYING IT | 2008 |
|
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| METHOD OF PRODUCING REACTOR POWDER OF ULTRAHIGH MOLECULAR WEIGHT POLYETHYLENE BY POLYMERISATION OF ETHYLENE | 2014 |
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|
RU2459835C2 |
| METHOD OF PREPARING CATALYST SYSTEM FOR PRODUCTION OF REACTOR POWDER OF ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE | 2016 |
|
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| CATALYTIC SYSTEM AND METHOD OF OBTAINING REACTOR POWDER OF SUPERHIGH-MOLECULAR-WEIGHT POLYETHYLENE | 2013 |
|
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| METHOD OF PRODUCING A REACTOR POWDER OF SUPER-HIGH-MOLECULAR POLYETHYLENE | 2015 |
|
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| CATALYTIC SYSTEM, METHOD FOR ITS PREPARATION AND METHOD FOR PRODUCING REACTOR POWDER OF ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE | 2021 |
|
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| CATALYST COMPONENT FOR POLYMERIZATION OF ETHYLENE TO ULTRAHIGH-MOLECULE POLYETHYLENE, CATALYST AND METHOD OF ITS PREPARATION | 2018 |
|
RU2676484C1 |
| TITANIUM-CONTAINING COMPONENT OF CATALYST FOR POLYMERIZATION OF ETHYLENE INTO OPEN ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE, CATALYST AND METHOD FOR ITS PREPARATION | 2023 |
|
RU2807896C1 |
| CATALYST COMPONENT FOR THE ETHYLENE POLYMERIZATION INTO THE HIGH-MOLECULAR ELASTOMER, THE CATALYST AND ITS PREPARATION METHOD | 2018 |
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RU2681535C1 |
