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Ethylene-propylene-butene ternary co-polymerized polypropylene, preparation method and applications thereof

A technology of ethylene-propylene-butylene ternary copolymerization polypropylene and ethylene, which is applied in the field of ethylene-propylene-butylene terpolymerization polypropylene and its preparation, can solve problems such as difficulty in realizing industrialized production, long-term stable production, reactor shutdown, and high risk, and achieve The production process is controllable, the production stability is improved, and the production stability is high.

Active Publication Date: 2019-01-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the melting point of polypropylene products decreases, the melting temperature of the polymer is closer to the polymerization reaction temperature. At this time, the local hot spots formed in the reactor can easily cause polymerization to produce lumps, sticky materials, and blocking materials. Leading to the shutdown of the reactor, the risk is relatively high, and it is difficult to achieve long-term stable production in industrial production

Method used

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  • Ethylene-propylene-butene ternary co-polymerized polypropylene, preparation method and applications thereof
  • Ethylene-propylene-butene ternary co-polymerized polypropylene, preparation method and applications thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Raw material propylene, ethylene, butene are placed in the gas phase reactor with the molar ratio of 86.7:1.8:11.5, in catalyst P100 (the fourth generation Ziegler-Natta catalyst, purchased from INEOS company), cocatalyst triethyl The polymerization reaction is carried out in the presence of aluminum (TEAL) and the silane modifier DIBDMS, and H is introduced into the reactor during the polymerization reaction. 2 To control the melt flow rate is 4g / 10min (melt flow rate (2.16), unit g / 10min, according to GB / T3682-2000 standard detection); wherein: the initial activity of catalyst P100 is 38993kg / kg; The mass content of components with a diameter greater than 900 μm is 50%; the molar ratio AL / Mg of the AL in the cocatalyst TEAL to the Mg in the catalyst P100 is 7:1; the AL in the cocatalyst TEAL and the silane modifier DIBDMS The molar ratio AL / Si of silicon is 1.2:1, the temperature of the controlled polymerization reaction is 63°C, the absolute pressure of the reaction ...

Embodiment 2

[0029] Raw material propylene, ethylene, butene are placed in the gas phase reactor with the molar ratio of 86.7:1.8:11.5, in catalyst P100 (the fourth generation Ziegler-Natta catalyst, purchased from INEOS company), cocatalyst triethyl The polymerization reaction is carried out in the presence of aluminum (TEAL) and the silane modifier DIBDMS, and H is introduced into the reactor during the polymerization reaction. 2 To control the melt flow rate is 5.4g / 10min; wherein: the initial activity of the catalyst P100 is 38993kg / kg; the mass content of the component with a particle size greater than 900 μm in the catalyst P100 is 50%; the AL in the cocatalyst TEAL and the catalyst P100 The molar ratio AL / Mg of Mg in the cocatalyst TEAL is 7:1; the molar ratio AL / Si of the silicon in the cocatalyst TEAL and the silane modifier DIBDMS is 1.2:1, and the temperature of the polymerization reaction is controlled at 63°C. The absolute pressure is 1.9MPa, the reaction time is 1.2h, H 2 Th...

Embodiment 3

[0032] The raw materials propylene, ethylene, and butene are placed in a gas phase reactor with a molar ratio of 86.8:1.5:11.7, and in the prepolymerization catalyst Y210 (the fourth generation Ziegler-Natta catalyst, purchased from Lihe Technology), cocatalyst three The polymerization reaction is carried out in the presence of ethyl aluminum (TEAL) and silane modifier DIBDMS, and H is introduced into the reactor during the polymerization reaction. 2 To control the melt flow rate to be 6.7g / 10min; wherein: the initial activity of the catalyst Y210 is 22500kg / kg; the mass content of the component with a particle size greater than 900 μm in the catalyst Y210 is 60%; the AL in the cocatalyst TEAL and the catalyst Y210 The molar ratio AL / Mg of Mg in the cocatalyst TEAL is 9:1; the molar ratio AL / Si of the silicon in the cocatalyst TEAL and the silane modifier DIBDMS is 2:1, and the temperature of the polymerization reaction is controlled at 61°C. The absolute pressure is 1.75MPa, ...

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Abstract

The invention provides ethylene-propylene-butene ternary co-polymerized polypropylene, a preparation method and applications thereof. The preparation method comprises: placing ethylene, propylene andbutene in a reactor, carrying out a polymerization reaction in the presence of a catalyst, an aluminum alkyl co-catalyst and a silane modifier, and introducing H2 during the polymerization reaction tocontrol the flowing rate of the melt so as to obtain the ethylene-propylene-butene ternary co-polymerized polypropylene, wherein a molar ratio of propylene to ethylene to butene at the starting of the polymerization reaction is controlled at (85.5-87.5):(1.5-2.5):(11-12), and the ethylene-propylene-butene ternary co-polymerized polypropylene has a weight average molecular weight of 210000-270000,molecular weight distribution of 3-4, ethylene mass content of 2.5-3.3% and butene mass content of 6.5-8.0%. According to the present invention, with the preparation method, the long-period stable production can be achieved while the ethylene-propylene-butene ternary co-polymerized polypropylene product with low heat-seal temperature can be prepared.

Description

technical field [0001] The invention belongs to the field of synthetic resins, and in particular relates to an ethylene-propylene-butylene ternary copolymerized polypropylene and a preparation method and application thereof. Background technique [0002] Polypropylene is a kind of thermoplastic resin prepared by the polymerization of propylene. According to the position of the methyl group, it can be divided into isotactic polypropylene, syndiotactic polypropylene and random polypropylene; among them, the methyl group of isotactic polypropylene is arranged in the main molecule. On the same side of the chain, the methyl groups of syndiotactic polypropylene are arranged alternately on both sides of the molecular main chain, and the methyl groups of atactic polypropylene are arranged disorderly on both sides of the molecular main chain. Because polypropylene has the advantages of low melting point, low heat-sealing temperature, high heat-sealing strength, and high transparency,...

Claims

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Application Information

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IPC IPC(8): C08F210/06C08F210/02C08F210/08
CPCC08F210/06C08F210/02C08F210/08
Inventor 张璐周豪朱军秦军冉崇文谌基国吴利平杨帆关莉席军龚树鹏胡廷芳张宝林
Owner PETROCHINA CO LTD