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Catalytic system for preparing cycloolefine copolymer

A technology of cycloolefin copolymers and catalytic systems, applied in the field of catalytic systems, can solve the problems of limiting the heat resistance of cycloolefin copolymers, affecting the effective utilization rate of cycloolefin monomers, and the low insertion rate of cycloolefin monomers, etc., to achieve effective Effect of increased utilization rate, improved insertion rate, and improved heat resistance

Inactive Publication Date: 2008-04-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] When the above catalytic systems carry out the copolymerization of cyclic olefin monomers and non-cyclic olefin monomers, there is a problem of low insertion rate of cyclic olefin monomers, which not only affects the effective utilization of cyclic olefin monomers, but also limits the use of cyclic olefin monomers. Further Improvement of Heat Resistance of Olefin Copolymers

Method used

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  • Catalytic system for preparing cycloolefine copolymer
  • Catalytic system for preparing cycloolefine copolymer
  • Catalytic system for preparing cycloolefine copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Dissolve 3.6 g of refined norbornene in 50 ml of refined toluene to form solution I. Solution I was added to a 100 ml Schlenk tube reactor previously flushed with nitrogen, and ethylene was pumped (1 atm) several times to saturate the solution with ethylene. Then 2 ml of a toluene solution of methylaluminoxane with a concentration of 1.72 mol / liter and 1.3 mg of isopropyl-(fluorenyl)-(cyclopentadienyl)zirconium dichloride were added successively. Polymerization was carried out at 50° C. and stirring at 250 r / min for 1 hour; during the polymerization process, ethylene was supplemented and metered, and the pressure was controlled at 1 atmosphere. After the reaction, the reaction solution was poured into ethanol for precipitation and filtered, and the filter cake was washed with ethanol and dried. The catalyst activity was 1.2×10 6 g / (mole zirconium·hour). The physical properties of the polymers are listed in Table 1.

Embodiment 2

[0035] Polymer is prepared by the method of embodiment 1, and the addition of refined norbornene is reduced to 0.7 gram by 3.6 gram, and catalyst activity 1.5 * 10 6 g / (mole zirconium·hour). The physical properties of the polymers are listed in Table 1.

Embodiment 3

[0037] The polymer is prepared by the method of Example 1, and the addition of refined norbornene rises to 5.4 grams from 3.6 grams, and the catalyst activity is 1.0×10 6 g / (mole zirconium·hour). The physical properties of the polymers are listed in Table 1.

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Abstract

The present invention discloses a catalyst system used for the preparation of a cycloolefin copolymer. The catalyst system comprises a main catalyst and an auxiliary catalyst, the main catalyst is a metallocene compound which has a structural formula of (I), and the auxiliary catalyst is an aluminum alkyl compound which has a structure of (II) or a structure of (III). A cycloolefin monomer of the cycloolefin copolymer which is prepared by the catalyst system for the preparation of cycloolefin copolymer has high insertion rate, the mole fraction can achieve 90 percent, and the heat-resistance of the cycloolefin copolymer is improved.

Description

technical field [0001] The present invention is a catalytic system for the preparation of cycloolefin copolymers. Background technique [0002] Cyclic-Olefin Copolymers, referred to as COC (Cyclic-Olefin Copolymers), are high value-added thermoplastic engineering plastics polymerized from cyclic olefins. COC resin has high transparency, extremely low dielectric constant, excellent moisture barrier, heat resistance, chemical stability and dimensional stability, and has been widely used in the manufacture of various optical lenses, automotive headlights, LCD Components, electronic and electrical components, pharmaceutical and food packaging materials, etc. In addition, COC resin is also considered to be the best material to replace PC for the production of next-generation high-density DVD. COC is usually obtained by addition polymerization using catalysts such as metallocenes. [0003] DE P4343566, DE P4422157, DE P4304307, DE P4304293, DE P4304292 and other patents all use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F232/00C08F4/54
Inventor 姚臻曹堃刘少杰吕飞
Owner ZHEJIANG UNIV
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