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Double-active center composite catalyst and cycloolefin copolymer prepared from same

A cyclic olefin copolymer and composite catalyst technology, applied in the field of dual-active center composite catalysts, can solve the problems of poor processability, low polymerization activity of non-metallocene catalysts and the like

Active Publication Date: 2017-05-17
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with general metallocene ethylene-cycloolefin copolymers, the polymerization activity of this non-metallocene catalyst is relatively low, and the obtained ethylene-cycloolefin copolymers tend to obtain high molecular weight polymers, and are easy to form gels, and the processability is relatively low. Difference

Method used

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  • Double-active center composite catalyst and cycloolefin copolymer prepared from same
  • Double-active center composite catalyst and cycloolefin copolymer prepared from same
  • Double-active center composite catalyst and cycloolefin copolymer prepared from same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] What used in this embodiment is a 1L tank reactor. Dissolve 0.15 mol of refined norbornene in 500ml of refined toluene to form a solution, add the solution to a reactor that has been flushed with nitrogen, and punch ethylene (0.1MPa) several times to make the solution saturated with ethylene. Under the condition of 0.1MPa and stirring, add 23.8ml of toluene solution with a concentration of 1.72mol / L methylaluminoxane, 13.7μmol 3,5-di-tert-butylsalicylidene 2-propylthioaniline trichloride Titanium and 13.7μmol di-n-butyldichlorozirconocene dual-active center composite catalyst, during the polymerization process, ethylene is supplemented and metered, and the pressure is controlled at 0.1MPa.

[0033] After reacting for 0.5h, stop the reaction, pour the reaction solution into ethanol (composed of 150ml hydrochloric acid and 1000ml ethanol) containing 15% (v / v%) hydrochloric acid, filter after precipitation, after the filter cake is washed with ethanol (300ml), dry (dried ...

Embodiment 2

[0035] What used in this embodiment is a 1L tank reactor. Dissolve 0.15 mol of refined norbornene in 500ml of refined toluene to form a solution, add the solution to a reactor that has been flushed with nitrogen, and punch ethylene (0.1MPa) several times to make the solution saturated with ethylene. Under the condition of 0.1MPa and stirring, add 23.8ml of toluene solution with a concentration of 1.72mol / L methylaluminoxane, 0.13mmol of triethylaluminum, 13.7μmol of salicylidene 2-methylthioaniline trichloride Titanium and 13.7 μmol dimethyl dichlorozirconocene composite catalyst with dual active sites, during the polymerization process, ethylene is supplemented and metered, and the pressure is controlled at 0.1 MPa.

[0036] After reacting for 0.5h, the reaction was stopped, and the reaction solution was poured into ethanol containing 15% (v / v%) hydrochloric acid (consisting of 150ml hydrochloric acid and 1000ml ethanol) and filtered after precipitation, and the filter cake w...

Embodiment 3

[0038] What used in this embodiment is a 1L tank reactor. Dissolve 0.15 mol of refined norbornene in 500ml of refined toluene to form a solution, add the solution to a reactor that has been flushed with nitrogen, and punch ethylene (1MPa) several times to make the solution saturated with ethylene. Under the condition of stirring, 23.8ml of toluene solution with a concentration of 1.72mol / L methylaluminoxane, 13.7μmol of 3,5-di-tert-butylsalicyl 2-mercaptoaniline titanium trichloride and 13.7μmol of di The dual-active center composite catalyst of n-butyl dichlorozirconocene, the polymerization process is supplemented by metering ethylene, and the control pressure is 1MPa.

[0039] After reacting for 0.5h, the reaction was stopped, and the reaction solution was poured into ethanol containing 15% (v / v%) hydrochloric acid (consisting of 150ml hydrochloric acid and 1000ml ethanol) and filtered after precipitation, and the filter cake was washed with ethanol (300ml) and dried ( 60 ...

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Abstract

The invention relates to a double-active center composite catalyst and a cycloolefin copolymer prepared from the same. The cycloolefin copolymer is prepared by the following steps: adding an inert organic solvent, cycloolefin and ethylene into a reactor under the conditions of temperature of 40 to 95 DEG C and pressure of 0.1 to 5.0MPa respectively, then adding a chain transfer agent, finally adding the double-active center composite catalyst for solution polymerization reaction, precipitating and filtering an obtained reaction solution after the reaction is finished, and washing and drying a filter cake obtained by filtering. According to the method, high catalytic activity and stable catalytic performance of the catalyst can be ensured; in addition, the prepared copolymer has relatively high strength and modulus relative to a metallocene ethylene-cycloolefin copolymer, and has relatively low molecular weight and relatively high processibility relative to a non-metallocene ethylene-cycloolefin copolymer.

Description

technical field [0001] The invention relates to a dual active center composite catalyst, in particular to a cycloolefin copolymer prepared by using the dual active center composite catalyst, which belongs to the technical field of fine chemical industry. Background technique [0002] Cyclic-Olefin Copolymers, referred to as COC (Cyclic-Olefin Copolymers), is a class of high value-added thermoplastic engineering plastics formed by the addition and copolymerization of cycloolefins, because of its high transparency, high glass transition temperature and high chemical resistance. Attention has been paid to characteristics such as character. At present, it 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. [0003] The early cycloolefin copolymerization used Ziegler-Natta catalyst, which had very low polymerization activity. With the emer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F232/08C08F210/02C08F2/38C08F4/6592
Inventor 郭峰汪文睿李传峰任鸿平杨爱武
Owner SINOPEC YANGZI PETROCHEM
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