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Catalyst composition applied to olefin polymerization and olefin polymerization method

An olefin polymerization and catalyst technology, applied in the field of olefin polymerization, can solve the problems of unsatisfactory, low ethylene polymerization activity, and decreased polyethylene molecular weight, etc.

Active Publication Date: 2018-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ethylene polymerization activity of the existing α-diimine nickel catalyst at high temperature is very low, and the molecular weight of the prepared polyethylene decreases rapidly with the increase of the polymerization temperature. Polymerization plant requirements

Method used

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  • Catalyst composition applied to olefin polymerization and olefin polymerization method
  • Catalyst composition applied to olefin polymerization and olefin polymerization method
  • Catalyst composition applied to olefin polymerization and olefin polymerization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The first olefin polymerization catalyst A1 [its structure is shown in formula (1), and its synthesis process can be found in literature Organometallics, 1998, 17, 2152-2154].

[0082]

[0083] The second olefin polymerization catalyst B1 [its structure is shown in formula (2), and its synthesis process can be found in literature Macromolecules, 2009, 42, 7789-7796].

[0084]

[0085] The cocatalyst was methylaluminoxane and the shuttling agent was diethylzinc (DEZ).

[0086] The stainless steel autoclave of 1L is evacuated and replaced with nitrogen, repeats this process twice, then evacuates again, under ethylene environment, adds 500 milliliters of toluene solvents, along with the adding of toluene, the cocatalyst (6.5ml concentration is 1.53 M in methylalumoxane in toluene) and DEZ (1 ml of 1.5M DEZ in toluene) were added via syringe. Then add catalyst A1 (5ml of toluene solution with a concentration of 1.0mM) and catalyst B1 (5ml of toluene solution with a c...

Embodiment 2

[0089] The first olefin polymerization catalyst A1 and the second olefin polymerization catalyst B1 are the same as in Example 1.

[0090] The cocatalyst was methylaluminoxane and the shuttling agent was diethylzinc (DEZ).

[0091] The stainless steel autoclave of 1L is evacuated and replaced with nitrogen, repeats this process twice, then evacuates again, under ethylene environment, adds 500 milliliters of toluene solvents, along with the adding of toluene, the cocatalyst (6.5ml concentration is 1.53 M in methylalumoxane in toluene) and DEZ (1 ml of 1.5M DEZ in toluene) were added via syringe. Then add catalyst A1 (6ml of toluene solution with a concentration of 1.0mM) and catalyst B1 (4ml of toluene solution with a concentration of 1.0mM) through a syringe, continue to feed ethylene, raise and maintain the pressure to 1.0MPa, polymerize at 60°C for 30min, Cool down, collect the polymer, and weigh it.

[0092] The specific aggregation results are listed in Table 1.

Embodiment 3

[0094] The first olefin polymerization catalyst A1 and the second olefin polymerization catalyst B1 are the same as in Example 1.

[0095] The cocatalyst was methylaluminoxane and the shuttling agent was diethylzinc (DEZ).

[0096] The stainless steel autoclave of 1L is evacuated and replaced with nitrogen, repeats this process twice, then evacuates again, under ethylene environment, adds 500 milliliters of toluene solvents, along with the adding of toluene, the cocatalyst (6.5ml concentration is 1.53 M in methylalumoxane in toluene) and DEZ (1 ml of 1.5M DEZ in toluene) were added via syringe. Add catalyst A1 (2ml of toluene solution with a concentration of 1.0mM) and catalyst B1 (8ml of toluene solution with a concentration of 1.0mM) through a syringe, continue to feed ethylene, raise and maintain the pressure to 1.0MPa, and polymerize at 60°C for 30min, Cool down, collect the polymer, and weigh it.

[0097] The specific aggregation results are listed in Table 1.

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Abstract

The invention relates to the field of olefin polymerization catalysts and provides catalyst composition applied to olefin polymerization and an olefin polymerization method. The catalyst composition is prepared from (1) a first olefin polymerization catalyst (A), (2) a second olefin polymerization catalyst (B), (3) a chain shuttling agent and (4) a cocatalyst, wherein the first olefin polymerization catalyst (A) is chosen from metal coordination compound shown by a general formula I; in the formula I, R1 to R5 and R7 to R11 are the same or different and are respectively and independently chosen from hydrogen, alkyl or halogen, M is metal in the (IV)th A group, X is the same or different and is chosen from halogen, alkyl and alkoxide, and L is metal in the (VI)th A group; the second olefinpolymerization catalyst (B) is chosen from metal coordination compound shown by a general formula II; in the formula II, R1 and R4 are the same or different and chosen from C1 to C30 alkyl or C1 to C30 heteroalkyl, R2 and R3 are the same or different and chosen from hydrogen, chlorin, C1 to C20 alkyl and organic group containing heteroatoms, and M is metal in the (VIII)th group. The catalyst can achieve copolymerization under higher temperature. (The formulas are shown in the description.).

Description

technical field [0001] The invention relates to the field of catalysts for olefin polymerization, and more specifically, to a catalyst composition for olefin polymerization and a method for olefin polymerization. Background technique [0002] Polymers with block structures have long been known to have superior properties compared to random copolymers and blends. For example, triblock copolymers of styrene and butadiene (SBS) and their hydrogenated variants (SEBS) have excellent heat resistance and elasticity. Block copolymers, known as thermoplastic elastomers (TPE), have "soft" or elastic segments connecting "hard" crystallizable parts in the polymer chain. When temperatures reach their melting point, or glass transition temperature in the "hard" segment, these polymers exhibit the properties of elastic materials. At higher temperatures, these polymers become flowable, exhibiting thermoplastic properties. Existing methods for preparing block copolymers include anionic po...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/70C08F110/02C08F210/16C08F210/02C08F210/14C08F232/08C08F295/00
CPCC08F10/00C08F110/02C08F210/02C08F210/16C08F295/00C08F4/7006C08F210/14C08F232/08C08F2500/01C08F2500/03
Inventor 高榕周俊领李岩刘东兵赖菁菁黄廷杰
Owner CHINA PETROLEUM & CHEM CORP
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