Applications of organosilanes, polyolefin resin and preparing method of the polyolefin resin

A polyolefin resin and organosilane technology, which is applied in the field of polyolefin resin and polyolefin resin preparation, can solve the problems of low melt strength of polyolefin resin and the like

Active Publication Date: 2017-04-19
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect of low melt strength of the polyolefin resin prepared by the existing method, and provide a kind of application of organosilane in the preparation of polyolefin resin, a kind of preparation method of polyolefin resin and The polyolefin resin prepared by this method

Method used

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  • Applications of organosilanes, polyolefin resin and preparing method of the polyolefin resin
  • Applications of organosilanes, polyolefin resin and preparing method of the polyolefin resin

Examples

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preparation example Construction

[0023] The preparation method of the polyolefin resin provided by the present invention comprises carrying out the olefin polymerization reaction of the olefin monomer in the presence of a catalyst, wherein, the method also includes adding the olefin monomer before and / or during the olefin polymerization reaction In the polymerization reaction system, organosilane is added, and the general formula of the organosilane is R 1 m SiX n (OR 2 ) k , where R 1 for C 2 -C 20 Hydrocarbyl and R 1 The end contains α-olefin double bond, norbornene group, cycloalkene group or dicyclopentadiene group, X is halogen, R 2 for C 1 -C 20 straight chain, branched or isomerized alkyl, m is an integer of 1-3, n is an integer of 1-3, k is an integer of 0-2, and m+n+k=4.

[0024] In addition, the specific selection of the organosilane has been described above and will not be repeated here.

[0025] The amount of the organosilane used in the present invention is not particularly limited, pr...

Embodiment 1

[0038] This example is used to illustrate the preparation method of the polyolefin resin provided by the present invention.

[0039] Slurry polymerization: under vacuum, 450 g of gaseous propylene monomer was charged into the reactor, and then 50 mL of hexane, 3 mL of heptane solution containing 5.5 mmol of triethylaluminum, 7-octenyl trichloro Silane 0.1 mL and 20 mg olefin polymerization catalyst (MgCl 2 / TiCl 4 / BMMF, where BMMF is the internal electron donor 9,9-dimethoxyfluorene, MgCl 2 、TiCl 4 The mass ratio to BMMF is 80:12:8), and the pressure in the reactor is controlled at 5.0 atmospheres, the reaction temperature is controlled at 60°C, and the polymerization is carried out for 0.5 hours. After the polymerization is completed, acidified ethanol is added to terminate the polymerization, and then respectively Wash with deionized water at a temperature of 60° C. and ethanol at a temperature of 50° C. each for three times, and finally vacuum-dry at 60° C. to obtain 20...

Embodiment 2

[0041] This example is used to illustrate the preparation method of the polyolefin resin provided by the present invention.

[0042] Bulk polymerization: under vacuum, 450 grams of liquid propylene was added to the reactor, followed by 0.25 mol of triethylaluminum, 0.005 gram of hydrogen, 0.02 mL of 7-octenyl trichlorosilane and 18 mg of olefin polymerization catalyst (MgCl 2 / TiCl 4 / BMMF, where MgCl 2 、TiCl 4The mass ratio to BMMF is 80:12:8), the reaction temperature is controlled at 70°C, and the polymerization is carried out for 30 minutes. Washing was performed, and vacuum drying was performed at 60° C. to obtain a homopolymer polypropylene resin. After testing, the concentration of 7-octenyltrichlorosilane in the homopolypropylene resin is 57ppm, the homopolypropylene resin has a branched or crosslinked structure, and its gel content is 1.1% by weight.

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Abstract

Applications of organosilanes, polyolefin resin and a preparing method of the polyolefin resin are provided. The method includes subjecting an olefin monomer to olefin polymerization under the existence of a catalyst. The method also includes adding organosilanes into the polymerization system before the olefin polymerization and/or in the olefin polymerization process. The general formula of the organosilanes is R<m><1>SiXn(OR<2>)k, wherein the R<1> is C2-C20 alkyl, the tail end of the R<1> comprises an alpha-olefin double bond, a norbornene group, a cycloolefin group or a dicyclopentadiene group, the X is halogen, the R<2> is C1-C20 straight-chain, branched or isomerized alkyl, the m is an integer ranging from 1 to 3, the n is an integer ranging from 1 to 3, the k is an integer ranging from 0 to 2, and the sum of the m, the n and the k is 4. The polyolefin resin prepared by the method has high melt strength and mechanical strength.

Description

technical field [0001] The invention relates to the field of olefin polymerization, in particular to an application of organosilane in preparing polyolefin resin, a preparation method of polyolefin resin and polyolefin resin prepared by the method. Background technique [0002] In recent years, although olefin polymerization modifiers with new structures and new properties have been discovered and applied to the research of high-performance polyolefins, some high-performance polyolefin resins with broad application prospects still lack effective means of catalytic polymerization preparation. . For example, cross-linked polypropylene with high melt strength has broad application prospects in blow molding, foaming and other applications, but there is currently no effective polymerization method to prepare such polypropylene directly in a polymerization tank. As another example, polypropylene inner alloys represented by impact copolymer polypropylene (hiPP) have great applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/06C08F230/08C08F232/04C08F232/08
Inventor 董金勇秦亚伟
Owner INST OF CHEM CHINESE ACAD OF SCI
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