Cycloolefin copolymer and preparation method thereof

A cycloolefin copolymer and copolymer technology, which is applied in the field of olefin polymerization, can solve the problems affecting the transparency of polymers and the heat resistance performance needs to be improved, and achieve the effect of improving transparency, good tolerance, and wide application prospects

Active Publication Date: 2021-05-04
广东华锦达新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to known literature, cycloolefin copolymers can be prepared by metallocene catalysts (CN95107662, CN94120496) or other non-transition metallocene catalysts (CN201610040109), but due to the inevitable homopolymerization of ethylene during the polymerization process, partial crystallinity of the polymerization system will occur Polyethylene segment, which affects the transparency of the polymer
At the same time, the heat resistance of cycloolefin copolymers needs to be improved

Method used

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  • Cycloolefin copolymer and preparation method thereof
  • Cycloolefin copolymer and preparation method thereof

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preparation example Construction

[0022] In the preparation process of the cyclic olefin copolymer of the present application, norbornene and tetracyclododecene are simple in structure, easy to synthesize, and have high reactivity, and the obtained ethylene / norbornene copolymer or ethylene / tetracyclododecene copolymer Regular structure and excellent performance.

[0023] In one embodiment, the cocatalyst is an alkylaluminoxane with a structure of (-AlM-O-)n, where n is any positive integer.

[0024] Preferably, the M is any one of methyl, ethyl, isobutyl and n-octyl; more preferably, the M is methyl or isobutyl.

[0025] In the preparation process of the cycloolefin copolymer of the present application, when M is methyl or isobutyl, the synergistic effect with the catalyst is better.

[0026] In one embodiment, the raw materials for the preparation of the cycloolefin copolymer further include an inert hydrocarbon solvent.

[0027] Preferably, the inert hydrocarbon solvent is an alkane and / or an aromatic hydr...

Embodiment 1

[0041] Embodiment 1 of the present invention provides a kind of described cyclic olefin copolymer, and its preparation method is as follows:

[0042] Under nitrogen atmosphere, add 38mL pre-prepared 0.30mol / L norbornene toluene solution, 1mL 10wt% methylaluminoxane toluene solution (cocatalyst) to the 100mL glass bottle, adjust the ethylene pressure to 1atm, Stir and balance at 20°C for 30 minutes; then add 1 mL of 1 μmol / mL catalyst 1 toluene solution to start the reaction, keep the ethylene pressure at 1 atm, and carry out the polymerization reaction for 30 minutes; add the reaction solution to 10vol% hydrochloric acid / ethanol solution to terminate the reaction, filter The precipitated copolymer was washed with ethanol, and vacuum-dried at 80° C. for 24 hours to obtain 0.55 g of a copolymer.

[0043] The structure of the catalyst 1 is R in Catalyst 1 1 -R 12 , Mt and the physical properties of the copolymer are described in Table 1 below.

Embodiment 2

[0045] Example 2 of the present invention provides the cyclic olefin copolymer. The specific implementation of the preparation method is the same as that of Example 1, except that Catalyst 2 is used instead of Catalyst 1 to obtain a copolymer with a weight of 0.52 g.

[0046] The structure of the catalyst 2 is R in Catalyst 2 1 -R 12 , Mt and the physical properties of the copolymer are described in Table 1 below.

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Abstract

The invention relates to the field of olefin polymerization, in particular to a cycloolefin copolymer and a preparation method thereof, and the cycloolefin copolymer is composed of structural units. A post-transition metal catalyst with a specific structure and a chain walking characteristic is adopted, generation of crystalline ethylene chain segments is avoided, the transparency of the obtained copolymer is improved, a branched structure is introduced into a polymer chain, under the same norbornene content, the polymer has a higher glass transition temperature than a metallocene ethylene/norbornene copolymer, and the thermal stability of the polymer is improved. Meanwhile, the catalytic system has good tolerance to water, oxygen and polar groups, can be used for preparing cycloolefin copolymers with polar groups, and has a wider application prospect.

Description

technical field [0001] The invention relates to the field of olefin polymerization, more specifically, the invention relates to a cycloolefin copolymer and a preparation method thereof. Background technique [0002] Cycloolefin copolymer is a kind of amorphous thermoplastic polymer prepared by addition copolymerization of cycloolefin monomer. It not only has the characteristics of good transparency, good heat resistance, low water absorption, chemical corrosion resistance, etc., but also has mechanical With the advantages of high strength, good dimensional stability, and low dielectric constant, it is widely used in optical materials, communication equipment, medical materials, packaging materials and other fields. [0003] According to known literature, cycloolefin copolymers can be prepared by metallocene catalysts (CN95107662, CN94120496) or other non-transition metallocene catalysts (CN201610040109), but due to the inevitable homopolymerization of ethylene during the pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/02C08F232/08C08F4/70
CPCC08F210/02C08F232/08C08F4/7006
Inventor 廖恒赵环宇刘阳左洪亮陈炳琳黄杰
Owner 广东华锦达新材科技有限公司
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