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Method for preparing solid homogenous metallocene cataloyst carried by poly phenylethylene

A metallocene catalyst and polystyrene technology are applied in the field of preparation of solid-state homogeneous metallocene catalysts, and can solve the problems of affecting the performance, influence and ash content of metallocene catalysts.

Inactive Publication Date: 2005-06-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inorganic carrier is generally SiO 2 , Al 2 o 3 etc. These inorganic carrier surfaces contain hydroxyl groups, and the surface of the carrier is generally treated before the metallocene is loaded. The acidic groups remaining on the surface may affect the performance of the metallocene catalyst obtained, and the use of the metallocene catalyst supported by the inorganic Polymerization, due to the high ash content in the product, will have an adverse effect on the performance of the polymerized product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Synthesis of linear polystyrene

[0025] In the four-necked flask of 1000 milliliters that thermometer is housed, mechanical stirring paddle is added successively 500 milliliters of deionized water, 2 gram polyvinyl alcohols, 100 gram styrene monomers and 1 gram initiator benzoyl peroxide, vigorously stir, The reaction was carried out at 80°C for 3 hours, and the product was vacuum-dried for 12 hours.

[0026] 2) Synthesis of chloromethylated linear polystyrene

[0027] Under anhydrous and anaerobic conditions, in a 1000 ml three-necked flask, 4.5 grams of linear polystyrene prepared in step 1) was dissolved in 450 ml of CCl 4 The solution was made into a polymer solution; in a 250 ml three-neck flask, 2.8 grams of anhydrous AlCl were added successively 3 , 170 ml CCl 4 and 10 grams of 1-nitropropane to prepare a catalyst solution. Add 6 g of chloromethyl methyl ether into the polymer solution at room temperature, and then slowly drop the catalyst solution into t...

Embodiment 2

[0033] 1) same as step 1) of embodiment 1

[0034] 2) Synthesis of chloromethylated linear polystyrene

[0035] Under anhydrous and anaerobic conditions, in a 100 ml three-necked flask, 1.1 g of linear polystyrene prepared in step 1) was dissolved in 25 ml of CCl 4 The solution was made into a polymer solution; in another 100 ml three-necked flask, 0.8 g of anhydrous AlCl was added successively 3 , 20 ml CCl 4 and 16 grams of 1-nitropropane to prepare a catalyst solution. Add 5.8 g of chloromethyl methyl ether into the polymer solution at normal temperature, and then slowly add the catalyst solution into the polymer solution dropwise. The reaction was carried out at room temperature for 1 hour, and then 10 ml of acetic acid was added to the system to terminate the reaction. Anhydrous methanol was used as a precipitating agent, and the precipitate was vacuum-dried at room temperature for 12 hours. The chloromethyl content in the product is 52.88% (mol%).

[0036] 3) Synthe...

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Abstract

A homogeneous solid metallocene catalyst carried by polystyrene for the polymerization of olefin is prepared through introducing the cyclopentadienyl to linear polystyrene chain and loading the metallocene into the cross-linked polystyrene network by the Diels-Alder cross-linking reaction under existance of metallocene. It features that when it is used for the polymerization of olefin, the cross-linked network of carrier can be gradually opened, resulting in smooth dynamic performance.

Description

technical field [0001] The invention relates to a preparation method of a solid homogeneous metallocene catalyst supported by polystyrene. Background technique [0002] In order to make metallocenes suitable for industrial slurry polymerization or gas phase polymerization, it is very important to support metallocenes to prepare supported metallocene catalysts. At present, the supports used to support metallocenes usually include inorganic supports and polymer supports. The inorganic carrier is generally SiO 2 , Al 2 o 3 etc. These inorganic carrier surfaces contain hydroxyl groups, and the surface of the carrier is generally treated before the metallocene is loaded. The acidic groups remaining on the surface may affect the performance of the metallocene catalyst obtained, and the use of the metallocene catalyst supported by inorganic materials to catalyze olefins Polymerization, due to the high ash content in the product, will have an adverse effect on the properties of t...

Claims

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Application Information

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IPC IPC(8): C08F4/02C08F4/645
Inventor 王文钦王立王剑峰董晓臣
Owner ZHEJIANG UNIV
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