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Catalyst composition applied to producing syndiotactic polystyrene material

A polystyrene and composition technology, which is applied in the field of catalyst compositions for producing syndiotactic polystyrene materials, can solve the problems of high manufacturing cost of aluminoxane, limit the feasibility of catalyst commercialization and the like, and achieves reduction of manufacturing cost, The effect of reducing the cost of styrene polymerization

Inactive Publication Date: 2008-02-13
GRAND PACIFIC PETROCHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the production cost of aluminoxane is too high, which often limits the commercial feasibility of the catalyst. Therefore, new co-catalysts or lower-cost catalyst formulations are developed to reduce the amount of aluminoxane used (or completely omit the aluminoxane The use of alkane) has always been an important topic in the research and development of metallocene catalysts

Method used

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  • Catalyst composition applied to producing syndiotactic polystyrene material
  • Catalyst composition applied to producing syndiotactic polystyrene material
  • Catalyst composition applied to producing syndiotactic polystyrene material

Examples

Experimental program
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Effect test

Embodiment 1

[0068] In Example 1, the polymerization of styrene monomer was carried out in a 500 mL (milliliter) stainless steel reactor (Parr Reactor) with an electric stirring device. The reactor was first charged with 100 mL of styrene monomer, then aluminoxane (MAO, 6.6 mmole (mole) Al), the reaction temperature was raised to 60 ° C, and then 0.75 mL of tetraethoxyalkyltitanium (Ti( OEt) 4 , 1.6×10 -2 M (mole) dissolved in toluene (toluene)) and 0.75mL of 1-butylcyclopentadienyl lithium (1.6×10 -2 M dissolved in toluene), to start the polymerization reaction. The reaction was carried out at 60° C. for 30 minutes, and then methanol was added to terminate the reaction. The resulting white solid of syndiotactic polystyrene was separated by filtration and dried under reduced pressure (80° C.) to obtain 10.2 g of the product (catalyst activity=1.7×10 6 g.sPS / mole.Ti.hr (every gram of syndiotactic polystyrene / every mole of titanium. per hour)), this syndiotactic polystyrene product is ana...

Embodiment 2

[0070] In Example 2, the polymerization reaction of styrene monomer was carried out in a 500 mL stainless steel reactor with an electric stirring device. The reactor was first charged with 100 mL of styrene monomer, then aluminoxane (6.6 mmole Al), the reaction temperature was raised to 70 ° C, and then 0.75 mL of triisopropoxy titanium chloride (ClTi(O i Pr) 3 , 1.6×10 -2 M dissolved in toluene) and 0.75mL of lithium pentamethylcyclopentadienyl (1.6×10 -2 M suspended in toluene), to start the polymerization reaction. The reaction was carried out at 70° C. for 10 minutes, then methanol was added to terminate the reaction, and the syndiotactic polystyrene white solid generated was separated by filtration and dried under reduced pressure (80° C.) to obtain 13.7 g of the product (catalyst activity=6.9×10 6 g.sPS / mole.Ti.hr), the syndiotactic polystyrene product is analyzed by carbon 13 nuclear magnetic resonance, and its syndiotacticity (racemic pentad (rrrr)) reaches 96%. In...

Embodiment 3

[0072] In Example 3, the polymerization reaction of styrene monomer was carried out in a 500 mL stainless steel reactor with an electric stirring device. The reactor was first charged with 100 mL of styrene monomer, then aluminoxane (6.6 mmole Al), the reaction temperature was raised to 70 ° C, and then 0.75 mL of tetra-n-butoxy titanium (Ti(O n Bu) 4 , 1.6×10 -2 M dissolved in toluene) and 0.75 mL of 1-butylindenyl sodium (1.6×10 -2 M suspended in toluene), to start the polymerization reaction. The reaction was carried out at 70° C. for 30 minutes, then methanol was added to terminate the reaction, and the syndiotactic polystyrene white solid generated was separated by filtration and dried under reduced pressure (80° C.) to obtain 8.60 g of the product (catalyst activity=1.4×10 6 g.sPS / mole.Ti.hr), the syndiotactic polystyrene product is analyzed by carbon 13 nuclear magnetic resonance, and its syndiotacticity (racemic pentad (rrrr)) reaches 92%. Further, in order to exam...

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Abstract

The utility model is used for the catalyst composition of the syndiotactic polystyrene. The utility model consists of: four price titanium metal compound, cyclopentadiene-alkali metal compound and assistance-catalyst of activated transition metal. The four price titanium metal compound does not use cyclopentadienyl for assistance base. When the catalyst composition of the three compounds are mixed together on the monomer condition in the catalyst vinyl aromatic compounds (such as styrene), the catalyst composition generates high activity catalyst to catalyze the polymerization reaction of the vinyl aromatic catalytic compounds, thereby generating a high-syndiotactic polymerization material.

Description

technical field [0001] The present invention relates to a catalyst composition used in the production of syndiotactic polystyrene materials, in particular to a catalyst composition composed of a tetravalent titanium metal compound, a cyclopentadienyl alkali metal compound and an activated transition metal co-catalyst, And it can be applied to the catalyst composition for producing syndiotactic polystyrene materials. Background technique [0002] The development of syndiotactic polystyrene (sPS) originated from the development of metallocene catalysts (or single-point polymerization catalysts), and in 1986 by Idemitsu Petrochemical Co., Ishihara of Japan (Ishihara) was prepared and synthesized for the first time with a titanium metal catalyst in the presence of a cocatalyst aluminoxane. [0003] Generally speaking, the preparation of syndiotactic polystyrene is mainly through the joint action of a transition metal titanium compound and aluminoxane (methyl aluminoxane; MAO) t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F112/08C08F4/643
Inventor 蔡敬诚张聪明郭憬忠林维信李柏庭
Owner GRAND PACIFIC PETROCHEM CORP
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