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Olefin polymer and preparation method thereof

An olefin polymer and olefin polymerization technology, applied in the field of olefin polymers, can solve the problems of not obtaining high melt index, high isotacticity and wide molecular weight distribution index α-olefin polymer, and achieve the effect of wide molecular weight distribution index

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problem that the prior art cannot realize α-olefin polymerization at high temperature, and cannot obtain α-olefin polymers with high melt index, high isotacticity and wide molecular weight distribution index, and provides a kind of olefin polymerization substances and their preparation methods

Method used

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  • Olefin polymer and preparation method thereof
  • Olefin polymer and preparation method thereof
  • Olefin polymer and preparation method thereof

Examples

Experimental program
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preparation example 1

[0075] This preparation example is used to illustrate the preparation of the solid component A containing magnesium and titanium used in the present invention.

[0076] (a) Add 0.05 moles of anhydrous magnesium chloride, 0.75 moles of toluene, 0.1 moles of epichlorohydrin, and 0.033 moles of tributyl phosphate in sequence in a reaction kettle that has been repeatedly replaced by high-purity nitrogen gas. Under the condition of , react for 1.5 hours, then add 1.9 mmoles of diethyl phthalate (DEP), and react for 1.0 hours to obtain a solution;

[0077](b) Cool the solution obtained in (a) to -28°C, add 0.51 moles of titanium tetrachloride dropwise, and then add 1.4 mmoles of 3,5 heptanediol dibenzoate diluted with 0.1 moles of toluene and 4.4 mmoles of Diphenyldimethoxysilane (DDS), continue to react for 1 hour to form a mixture;

[0078] (c) Gradually raise the temperature of the mixture formed in (b) to 85°C, and solid particles are precipitated during the heating process. A...

preparation example 2

[0081] According to the method of preparation example 1, difference is:

[0082] In (a), replace "1.9 mmol diethyl phthalate (DEP)" with "1.9 mmol di-n-butyl phthalate (DNBP)";

[0083] In (c), "2.6 mmoles of di-n-butyl phthalate (DNBP)" replaces "2.6 mmoles of diethyl phthalate (DEP)". A solid component A2 containing magnesium and titanium is obtained.

preparation example 3

[0085] This preparation is used to illustrate the preparation of the prior art solid components.

[0086] Add 0.05 moles of anhydrous magnesium chloride, 0.88 moles of toluene, 0.05 moles of epichlorohydrin, and 0.05 moles of tributyl phosphate into the reaction kettle, and react for 2 hours at a stirring speed of 450 rpm and a temperature of 60°C. Add 0.01 moles of Phthalic anhydride, continue to react for one hour, lower the temperature to -28°C, add 0.51 moles of titanium tetrachloride dropwise, gradually raise the temperature to 85°C, add 8.0 mmoles of di-n-butyl phthalate at 80°C, After reaching the temperature, keep the temperature for 1 hour, filter the mother liquor, wash twice with 0.95 mol of toluene, add 0.57 mol of toluene and 0.36 mol of titanium tetrachloride after filtering, keep the temperature at 110°C for 2 hours, repeat the treatment once after filtering, and hexane 5 After several washings and drying, the solid component B1 was obtained.

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Abstract

The invention discloses an olefin polymer and a preparation method thereof. The preparation method comprises the following steps of (1) carrying out low-temperature reaction on an alpha-olefin monomer and an olefin polymerization catalyst at the temperature of higher than or equal to 0 DEG C and lower than 50 DEG C for 1-60 minutes, wherein the olefin polymerization catalyst contains a solid component A and a specific organic silicon compound C which are prepared through specific steps; and (2) carrying out high-temperature polymerization reaction on the low-temperature reaction product obtained in the step (1) at the temperature of 80-120 DEG C. By using the preparation method disclosed by the invention, the polymerization activity during high-temperature polymerization of alpha-olefin can be improved; and the obtained olefin polymer is high in melt index and can also be high in isotacticity and wide in molecular weight distribution.

Description

technical field [0001] The invention relates to an olefin polymer and a preparation method thereof, in particular to a method for preparing an olefin polymer by high-temperature polymerization of α-olefin, and the olefin polymer prepared by the method. Background technique [0002] α-Olefin polymers are important synthetic organic materials. The use of this material requires not only suitable mechanical properties, but also properties that can adapt to processing applications. Among them, the isotacticity, melt index and molecular weight distribution index (MWD) of α-olefin polymers are important factors affecting the mechanical properties and processing properties of polymers. [0003] The isotacticity of an α-olefin polymer determines to a certain extent the rigidity of the polymer. In general, the higher the isotacticity, the higher the rigidity of the α-olefin polymer. Therefore, when higher rigidity is required for the α-olefin polymer, it is advantageous to increase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F110/06C08F4/649C08F4/646C08F4/653
Inventor 严立安谭忠周奇龙徐秀东宋维玮于金华李凤奎尹珊珊
Owner CHINA PETROLEUM & CHEM CORP
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