Ethylene-alpha olefin copolymer and preparation method thereof

A technology of alpha olefin and copolymer, applied in the field of ethylene-alpha olefin copolymer and its preparation, can solve problems such as gel phenomenon, achieve the effects of good fluidity, easy availability of raw materials, and reduction of gel content

Active Publication Date: 2013-10-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the existing ethylene-alpha olefin solution copolymerization, especially when the vinyl content in the copolymer is high, it is easy to produce a gel phenomenon in the copolymerization process, and to provide a method for reducing gelation. Preparation method of ethylene-alpha olefin copolymer with gumming phenomenon

Method used

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  • Ethylene-alpha olefin copolymer and preparation method thereof
  • Ethylene-alpha olefin copolymer and preparation method thereof

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preparation example Construction

[0012] According to the preparation method of ethylene-alpha olefin copolymer of the present invention, the method comprises: under the condition of olefin solution copolymerization, in the presence of a solvent and a gel inhibitor, contacting ethylene and alpha olefin with a catalyst to obtain ethylene-alpha olefin copolymerization The catalyst contains organoaluminum and vanadium compounds, wherein the gel inhibitor is selected from the group consisting of perchloropropene, hexachlorobutadiene, hexachlorocyclopentadiene, arylsulfonyl halides, and halogen atoms with at least 2 One or more of halogenated fatty acid esters and aromatic halogenated hydrocarbons with at least 3 halogen atoms.

[0013] In the present invention, the term "dry glue amount" refers to the weight of ethylene-alpha olefin polymer; "insoluble matter" refers to the dry glue that exists in the polymer solution and is insoluble in the polymer solution; The polymer attached to the wall of the polymerization ...

Embodiment 1

[0047] Replace the pre-dried 0.5L polymerization kettle equipped with stirring paddle and jacket with nitrogen and raw material monomer respectively, add 200mL dry hexane solvent into the polymerization kettle, and then dry the The mixed gas of ethylene, propylene and hydrogen is pre-saturated at 20°C and 0.5 MPa pressure for 20 minutes, and the cocatalyst sesquiethylaluminum chloride 0.8mmol, vanadyl trichloride 0.04mmol and ethyl trichloroacetate 0.2mmol are added, and the polymerization kettle The jacket was circulated with cold water, the reaction temperature was controlled to keep constant at 20° C., the reaction pressure was 0.5 MPa, and the flow rate of the mixed monomer was guaranteed to be 2 standard liters / minute. After polymerization reaction 30 minutes, stop conveying ethylene, propylene, hydrogen, stop stirring, remove ethylene, propylene, add ethanol 10ml to terminate polymerization reaction, add the hexane solution that is the antioxidant Irganox 1520 of 0.2wt% b...

Embodiment 2

[0049] Other conditions were the same as in Example 1, except that the type and amount of the gel inhibitor used during polymerization were changed to: 0.2 mmol of n-butyl trichloroacetate. After reacting for 30 minutes, the amount of dry glue and the gel condition of the measured sample are shown in Table 1.

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Abstract

The invention discloses an ethylene-alpha olefin copolymer and a preparation method thereof. The method comprises the following step of: enabling ethylene and alpha olefin to be in contact with a catalyst under the condition of olefin solution polymerization in the presence of a solvent and a gel inhibitor to obtain the ethylene-alpha olefin copolymer, wherein the catalyst contains an organic aluminum and vanadium compound, and the gel inhibitor is selected from one or more of 1,1,2,3,3,3-hexachloro-1-propene, hexachlorocyclopentadiene, aryl sulfonyl halide, halogenated fatty acid ester with at least two halogen atoms and aryl halide with at least three halogen atoms. By using the method provided by the invention, gel generated in the copolymerization process can be reduced.

Description

technical field [0001] The invention relates to an ethylene-alpha olefin copolymer and a preparation method thereof. Background technique [0002] Ethylene-alpha olefin copolymers, such as ethylene-propylene copolymers, are a very important class of elastomers. Due to the high saturation of their molecular chains, they have excellent ozone resistance, aging resistance, chemical corrosion resistance, Electrical insulation and steam resistance are widely used in automotive parts, waterproof membranes for building materials, wire and cable sheaths, heat-resistant hoses, adhesive tapes, lubricant additives, and polyolefin modification. [0003] Ethylene-alpha olefin copolymers with high ethylene content usually have certain requirements for their molecular weight and crystallinity, so their raw rubber has higher strength. This feature can make it well used in the development of extruded products, polyolefin modification and olefin thermoplastic elastomers. [0004] Elastic eth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/16C08F2/40C08F4/68
Inventor 陈建军徐一兵李传清唐正伟邵明波李静
Owner CHINA PETROLEUM & CHEM CORP
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