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Domino catalytic system producing branching polythene and use method of the same

A branched polyethylene and catalytic system technology, applied in the field of domino catalytic systems, can solve problems such as expensive cocatalysts, and achieve the effects of cheap synthetic raw materials, reduced production costs, and simple polymerization process

Inactive Publication Date: 2008-02-27
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalytic system is a complex catalytic system composed of a main catalyst and two co-catalysts, an oligomerization co-catalyst and a co-polymerization co-catalyst; Interference between them, and by using various alkylaluminum co-catalysts that are being used in the industry, to reduce the amount of MAO or even use the more expensive MAO, it overcomes the disadvantage that the co-catalyst is more expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In a two-necked flask, at room temperature under N 2 Dissolve 0.5 g of β-diketone ligand A with the structure shown in Table 1 in ether solution and add to the solution containing 1.5 ml TiCl 4 Carry out complex coordination in the diethyl ether solution, then heat up to the solvent reflux temperature, reflux for 6 hours, stop the reaction, filter, wash the precipitate with diethyl ether, and vacuum dry at room temperature to obtain the milky white main catalyst A 2 TiCl 2 powder.

[0033] Add 50ml of toluene distilled by reflux of metal sodium into a 250ml three-necked flask that has been replaced three times with nitrogen and twice with ethylene, stir and raise the temperature to 30°C, and add the main catalyst A according to the ratio shown in Table 1 2 TiCl 2 , oligomerization promoter Al(C 2 h 5 ) 3 and co-catalyst MAO, where the molar ratio of oligomerization co-catalyst to main catalyst Al 1 : M=10, the molar ratio of co-catalyst to main catalyst is Al 2 ...

Embodiment 2

[0035] In a two-neck flask, at room temperature N 2 β-diketone ligand A0.52g of the structure shown in Table 1 was dissolved in ether and added to the solution containing 1.5mlTi(OPh) 4 Carry out complex coordination in the diethyl ether solution, then heat up to the solvent reflux temperature, reflux for 6 hours, stop the reaction, filter, wash the precipitate with diethyl ether, and vacuum dry at room temperature to obtain milky white main catalyst A 2 Ti(OPh) 2 powder.

[0036] Add 50ml of toluene distilled by metal sodium reflux to a 250ml three-necked flask that has been replaced three times with nitrogen and twice with ethylene, stir and heat up to 50°C, and add the main catalyst A according to the ratio shown in Table 1 2 Ti(OPh) 2 , oligomerization promoter Al(C 2 h 5 ) 2 Cl and co-catalyst EAO, where the molar ratio of oligomerization co-catalyst to main catalyst Al 1 : M=50, the molar ratio of co-catalyst to main catalyst is Al 2 : M=200, the polymerization r...

Embodiment 3

[0038] In a two-neck flask, at room temperature N 2 Dissolve 0.48 g of β-diketone ligand A with the structure shown in Table 1 in ether and add to the solution containing 2ml of TiCl 4 Carry out complexation and coordination in the diethyl ether solution, then heat up to the solvent reflux temperature, reflux for 6 hours, stop the reaction, filter, wash the precipitate with diethyl ether, and vacuum dry at room temperature to obtain the milky white main catalyst ATiCl 3 powder.

[0039] Add 50ml of toluene distilled by reflux of metal sodium into a 250ml three-necked flask that has been replaced three times with nitrogen and twice with ethylene, stir and raise the temperature to 30°C, and add the main catalyst ATiCl according to the ratio shown in Table 1 3 , oligomerization cocatalyst Al(i-Bu) 3 and co-catalyst BAO, where the molar ratio of oligomerization co-catalyst to main catalyst Al 1 : M=50, the molar ratio of co-catalyst to main catalyst is Al 2 : M=100, the polyme...

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Abstract

The invention discloses a domino catalytic system to prepare branch polythene and application, which is characterized by the following: comprising the catalytic system as multiple allocating catalytic system; setting as main accelerant, oligomerisation catalyst promoter and copolymerization catalyst promoter; setting the formula of the main accelerant as AnML4-n; setting n as 1, 2, 3 or 4; expressing ligand beta-diketone with A; setting the M as Ti or Zr; setting the L as assistance coordination group; setting the oligomerisation catalyst promoter as alkyl aluminium; setting the oligomerisation catalyst promoter as aluminium alkyl oxygen alkyl and three isobutyl aluminum; preparing branch polythene under the function of main accelerant, oligomerisation catalyst promoter and copolymerization catalyst promoter. This invention can decrease the cost of branch polythene, which possesses simple craft and easy control.

Description

technical field [0001] The technical solution of the invention relates to ethylene polymers, in particular to a domino catalyst system for preparing branched polyethylene and an application method thereof. technical background [0002] Branched polyethylene is a kind of polyethylene with excellent properties, which can be divided into short-chain branched polyethylene and long-chain branched polyethylene according to the length of the branch chain. Short chain branched polyethylene generally refers to linear low density polyethylene (LLDPE). LLDPE has excellent toughness and environmental stress crack resistance, high impact strength, tear strength, tensile strength, and has good creep resistance, mold release ability and film forming, heat sealing performance and strength Moderate and other excellent performance. Therefore, it has great advantages in the production of medical equipment, film manufacturing, cable coating materials, and corrosion-resistant and stress-crack-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/642
Inventor 闫卫东杨敏刘盘阁刘宾元张旭胡文艳郝小宇沈晓莉
Owner HEBEI UNIV OF TECH
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