CN104140435B - The preparation method of rare earth compounding and preparation method thereof and catalyst and its application and rare-earth isoprene rubber - Google Patents
The preparation method of rare earth compounding and preparation method thereof and catalyst and its application and rare-earth isoprene rubber Download PDFInfo
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Abstract
The invention discloses one kind, the invention discloses the preparation method of rare earth compounding and preparation method thereof, rare earth catalyst and application, and rare-earth isoprene rubber.The rare earth compounding has formula（I）Shown structure, wherein, R1、R2And R3It is each independently hydrogen or C1‑C20Alkyl；Ln is one kind in rare earth metal, and THF represents tetrahydrofuran, and Me represents methyl.Suitable 1,4 structural contents for the rare-earth isoprene rubber that the rare earth catalyst that the present invention is provided is prepared are high.
Description
Technical field
The present invention relates to a kind of rare earth compounding and preparation method thereof, the catalyst containing the rare earth compounding, the catalyst
The preparation method of application and rare-earth isoprene rubber in conjugate diene polymerization.
Technical background
Since finding that rare earth compounding can be catalyzed diolefin polymerization from China's sixties in last century, in the world to rare earth metal
The research of organic compound catalytic polymerization has made great progress, and develops series of rare earth catalyst system and catalyzing, such as neodymium chloride/alkyl
Aluminum binary system, carboxylic acid neodymium/alkyl aluminum/halide ternary system and carboxylic acid neodymium/alkyl aluminum/alkyl halide/isoprene
Quaternary catalytic system, the high-cis polybutadiene synthesized with such rare earth catalyst and polyisoprene rubber turn into industrialization
The important kind of production.
In recent years, some luxuriant, half luxuriant and non-luxuriant cationic catalyzing of rare-earth metal systems turn into study hotspot again.It is this kind of to urge
Agent limits its geometric configuration by changing the part of complex, can improve the efficiency and selectivity of catalyst, realizes conjugation
Diene polymerization or the combined polymerization with monoolefine.Rare earth metallocene/alkyl aluminum/organic the boron salt applied such as Riken researcher
Cationic catalysts system has very high catalytic activity to combined polymerization and with the combined polymerization of vinyl aromatic compounds,
And the characteristics of polymerisation active polymerization, it for details, reference can be made to US2002/0119889, US6,596,828, US6,960,
631B2, and US6,683,140B2, but these technologies, when carrying out the polymerization of isoprene, acquisition is higher than more than 95 weight %
Cis- Isosorbide-5-Nitrae selectivity, it is necessary to carried out under the polymerization temperature less than -20 DEG C, operating condition is harsh.
Changchun Institute of Applied Chemistry of the Chinese Academy of Sciences Cui east plum disclosed in CN101186663A a kind of NCN clamp type rareearth complexes and
Three component cationic catalyst system and catalyzings of alkyl aluminum, organic boron salt composition, isoprene polymerization is catalyzed in the range of -20 to 80 DEG C
When, cis- Isosorbide-5-Nitrae structural content is 55.0-98.8% in polymer；During Butadiene Polymerization, cis- Isosorbide-5-Nitrae structural content in polymer
For 90.1-99.9%.
The content of the invention
The purpose of the present invention be on the basis of existing technology there is provided a kind of new rare earth compounding and preparation method thereof,
There is cis- 1,4 high selective rare earth catalysts, above-mentioned rare earth catalyst when carrying out isoprene polymerization in conjugated diene
Application and a kind of preparation method of rare-earth isoprene rubber during polymerized hydrocarbon.
The present invention provides a kind of rare earth compounding, wherein, the rare earth compounding has formula（I）Shown structure：
Wherein, R1、R2And R3It is each independently hydrogen or C1-C20Alkyl；Ln is one kind in rare earth metal, and THF represents four
Hydrogen furans, Me represents methyl.
The present invention also provides a kind of preparation method of rare earth compounding, and this method is included in production（Ⅰ）Shown structure
Under conditions of rare earth compounding, there will be formula（Ⅱ）The compound of shown structure is Ln (CH with formula2SiMe3)3(THF)2Change
Compound is contacted in organic solvent,
Wherein, R1、R2And R3It is each independently hydrogen or C1-C20Alkyl；Ln is one kind in rare earth metal, and THF represents four
Hydrogen furans, Me represents methyl.
Present invention also offers the rare earth compounding prepared by the above method.
Present invention also offers one kind be used for rare earth catalyst, wherein, the catalyst contain above-mentioned rare earth compounding and
Boride.
Present invention also offers application of the above-mentioned rare earth catalyst in conjugate diene polymerization.
Present invention also offers a kind of preparation method of rare-earth isoprene rubber, this method includes：In the presence of organic solvent
Under the conditions of lower and solution polymerization, isoprene is contacted with rare earth catalyst, wherein, the rare earth catalyst is the present invention
The above-mentioned rare earth catalyst provided.
When the rare earth catalyst containing the rare earth compounding that the present invention is provided is used for isoprene polymerization, it is preferable to carry out
Cis- 1,4 structural content that rare-earth isoprene rubber is obtained in mode may be up to 99 weight %.
Embodiment
The rare earth compounding that the present invention is provided, the rare earth compounding has formula（I）Shown structure：
Wherein, R1、R2And R3It is each independently hydrogen or C1-C20Alkyl；Ln is one kind in rare earth metal, and THF represents four
Hydrogen furans, Me represents methyl.
Wherein, the C1-C20Alkyl can be straight or branched, and instantiation can include but is not limited to：Methyl, second
Base, n-propyl, isopropyl, normal-butyl, sec-butyl, isobutyl group, the tert-butyl group, n-pentyl, 1- ethyl propyls, 2- methyl butyls, 3-
Methyl butyl, 2,2- dimethyl propyls, n-hexyl, 2- methyl amyls, 3- methyl amyls, 4- methyl amyls, n-heptyl, 2- methyl
Hexyl, 3- methylhexyls, 4- methylhexyls, 5- methylhexyls, n-heptyl, n-octyl, n-nonyl, positive decyl, 3,7- dimethyl
Octyl group, dodecyl, n-tridecane base, n-tetradecane base, n-pentadecane base, n-hexadecyl, n-octadecane base, positive 19
Alkyl and n-eicosane base.The C1-C5The instantiation of straight or branched alkyl can include but is not limited to：Methyl, second
Base, n-propyl, isopropyl, normal-butyl, sec-butyl, isobutyl group, the tert-butyl group, n-pentyl, isopentyl, tertiary pentyl and neopentyl.
The present inventor has found under study for action, by specific R1-R3Constituted rare earth compounding is coordinated to be used as catalysis
Fabulous catalytic effect can be obtained during the component of the catalyst of isoprene polymerization, it is therefore preferred that R1、R2And R3It is each independent
Ground is hydrogen or C1-C4Alkyl；It is further preferred that R1、R2And R3It is identical, still further preferably R1、R2And R3It is methyl or equal
For isopropyl.
The present inventor has found that the rare earth compounding being made up of specific rare earth is as catalysis isoamyl under study for action
Fabulous catalytic effect can be obtained during the catalyst of diene polymerization, it is therefore preferred that rare earth metal Ln is Sc or Lu or Y, enters one
Preferred rare earth metal is walked for Sc or Lu.
The preparation method for the rare earth compounding that the present invention is provided, this method is included in production（Ⅰ）The rare earth of shown structure
Under conditions of complex, there will be formula（Ⅱ）The compound of shown structure is Ln (CH with formula2SiMe3)3(THF)2Compound
Contact in organic solvent,
Wherein, R1、R2And R3It is each independently hydrogen or C1-C20Alkyl；Ln is one kind in rare earth metal, and THF represents four
Hydrogen furans, Me represents methyl.
Wherein, as described above, the C1-C20Alkyl can be straight or branched, instantiation can include but not limit
In：Methyl, ethyl, n-propyl, isopropyl, normal-butyl, sec-butyl, isobutyl group, the tert-butyl group, n-pentyl, 1- ethyl propyls, 2- first
Base butyl, 3- methyl butyls, 2,2- dimethyl propyls, n-hexyl, 2- methyl amyls, 3- methyl amyls, 4- methyl amyls, positive heptan
Base, 2- methylhexyls, 3- methylhexyls, 4- methylhexyls, 5- methylhexyls, n-heptyl, n-octyl, n-nonyl, positive decyl, 3,
7- dimethyl octyl group, dodecyl, n-tridecane base, n-tetradecane base, n-pentadecane base, n-hexadecyl, n-octadecane
Base, NSC 77136 base and n-eicosane base.The C1-C5The instantiation of straight or branched alkyl can include but is not limited to：
Methyl, ethyl, n-propyl, isopropyl, normal-butyl, sec-butyl, isobutyl group, the tert-butyl group, n-pentyl, isopentyl, tertiary pentyl and new
Amyl group.
The present inventor has found under study for action, by specific R1-R3Constituted rare earth compounding is coordinated to be used as catalysis
Fabulous catalytic effect can be obtained during the catalyst of isoprene polymerization, it is therefore preferred that R1、R2And R3It is each independently
Hydrogen or C1-C3Alkyl；It is further preferred that R1、R2And R3It is identical, still further preferably R1、R2And R3It is methyl or is different
Propyl group.
According to the present invention, with formula（Ⅱ）The instantiation of the compound of shown structure can include but is not limited to：8-(N-
2,6- dimethyl) imido grpup 1,2,3,4- tetrahydroquinolines, 8- (N-2,6- diisopropyls) imido grpup 1,2,3,4- tetrahydroquinolines.Before
Stating material can be commercially available.
According to the present invention, formula is Ln (CH2SiMe3)3(THF)2The instantiation of compound can include but not limit
In：Lu(CH2SiMe3)3(THF)2、Sc(CH2SiMe3)3(THF)2Y(CH2SiMe3)3(THF)2.Aforementioned substances can be by commercially available
Or common knowledge synthesis is obtained.For example, Ln (CH2SiMe3)3(THF)2Can be according to document Journal of Polymer
Science:Part A:Method synthesis disclosed in Polymer Chemistry DOI10.1002/POLA1376 page.
According to the present invention, with formula（Ⅱ）The compound of shown structure and Ln (CH2SiMe3)3(THF)2Compound amount
It can be selected and be changed in wider scope, as long as can obtain with formula（Ⅰ）The rare earth compounding of shown structure is
Can, for example, with formula（Ⅱ）The compound of shown structure and Ln (CH2SiMe3)3(THF)2The mol ratio of compound can be
1：0.5-1.5, preferably 1:0.75-1.25.
The present inventor has found that the rare earth compounding being made up of specific rare earth is as catalysis isoamyl under study for action
Fabulous catalytic effect can be obtained during the catalyst of diene polymerization, it is therefore preferred that rare earth metal Ln is Sc or Lu or Y, enters one
Preferred rare earth metal is walked for Sc or Lu.
The present invention is to the production（Ⅰ）The condition of the rare earth compounding of shown structure is not particularly limited, Ke Yiwei
The conventional selection of this area.As a rule, the production（Ⅰ）The condition of the rare earth compounding of shown structure includes reaction temperature
And the reaction time.Wherein, the reaction temperature can be selected and changed in wider scope, in order to be more beneficial for reaction
Progress, the reaction temperature can for -20 DEG C to 60 DEG C, be preferably 0-20 DEG C.The extension in reaction time is conducive to reactant
Conversion ratio or reaction product yield raising, but reaction time long conversion ratio or the receipts of reaction product to reactant
The increase rate of rate is not obvious, therefore, generally, the reaction time can for 4-16 hour, preferably 8-16 it is small
When.
The preparation method of the rare earth compounding provided according to the present invention, the organic solvent for being used to prepare rare earth compounding
Can for it is existing it is various can as reaction media organic substance, for example, can be varsol and/or ether solvent.
The varsol can be C1-C5Alkane or halogenated alkane, C5-C7Cycloalkane, aromatic hydrocarbons and isoparaffin in one kind or
It is a variety of.The instantiation of the varsol can include but is not limited to：N-hexane, pentane, normal heptane, pentane, dichloromethane
One or more in alkane, chloroform, hexamethylene, benzene, toluene, 1,4- dioxane and tetrahydrofuran.The ether solvent
Can be C4-C15Monoether and/or polyether.The instantiation of the ether solvent can include but is not limited to：Tert-butoxy second
Epoxide ethane and/or tetrahydrofuran.Wherein, these solvents can be used alone, can also be used in mixed way.The organic solvent
Consumption can be according to formula（Ⅱ）The compound of shown structure is Ln (CH with formula2SiMe3)3(THF)2Compound
Consumption is reasonably selected, for example, the consumption of the solvent can cause with formula（Ⅱ）The compound of shown structure is with leading to
Formula is Ln (CH2SiMe3)3(THF)2Compound total concentration be 1-30 weight %, preferably 5-20 weight %.
According to the present invention, the method that the present invention is provided is additionally included in after above-mentioned reaction completion, and the organic solvent is gone
Remove.Wherein, removing the method for the organic solvent can be carried out using various methods well known in the art, for example, vacuum line is removed
Organic solvent, revolving, in this regard, those skilled in the art can know, will not be described in great detail herein except organic solvent etc..
In addition, in order to obtain sterling, the step of method that the present invention is provided can also include the product purification that will be obtained, institute
Stating the method for purifying can be carried out using various purification process well known in the art, such as be recrystallized.Recrystallization solvent used
For example can be n-hexane and/or hexamethylene.
Present invention also offers the rare earth compounding prepared by the above method.
The rare earth catalyst that the present invention is provided, the catalyst contains boride and rare earth compounding, wherein, the rare earth is matched somebody with somebody
The above-mentioned rare earth compounding that compound provides for the present invention.
According to the present invention, the content of the rare earth compounding and boride can be selected and become in wider scope
It is dynamic, but conjugate diene polymerization is preferably catalyzed in order that obtaining both materials and can play, under preferable case, the rare earth is matched somebody with somebody
The mol ratio of compound and boride can be 1：0.9-1.1, preferably 1：0.95-1.
According to the present invention, the boride can be the existing various boracic chemical combination that can act as metallocene co-catalyst
Thing, for example, [Ph can be selected from3C][B(C6F5)4]、[PhMe2NH][B(C6F5)4] and B (C6F5)3In one or more.More than
Material can be commercially available.
According to the present invention, wherein, the catalyst also contains alkyl aluminum and/or alkyl aluminium hydride.
Heretofore described alkyl aluminum and/or alkyl aluminium hydride refer to alkyl aluminum, alkyl aluminium hydride or their mixing
Thing.It is preferred that the alkyl aluminum and/or alkyl aluminium hydride are trimethyl aluminium, triethyl aluminum, tri-propyl aluminum, tri-butyl aluminum, three amyl groups
One or more in aluminium, three hexyl aluminium, diethyl aluminium hydride and hydrogenation dibutyl aluminium；Preferably tri-butyl aluminum and/or hydrogenation
Dibutyl aluminium.Heretofore described alkyl aluminum and/or alkyl aluminium hydride refer to alkyl aluminum, alkyl aluminium hydride or their mixing
Thing.
According to the present invention, the alkyl aluminum and/or alkyl aluminium hydride can be in wider scopes with rare earth compounding content
It is interior to be selected and changed, but in order to preferably be catalyzed conjugate diene polymerization, the alkyl aluminum and/or alkyl aluminium hydride it is total
The ratio of the molal quantity of molal quantity and rare earth compounding can be 10-50：1.Above material can be commercially available.
The invention provides application of the rare earth catalyst of the present invention in conjugate diene polymerization.
The catalyst of the present invention is as the catalyst during conjugate diene polymerization in use, generally relative to every mole
Conjugated diene, usage amount be 1 × 10-6-4×10-4Mol rare earth metals, preferably 1.5 × 10-6-3.5×10-4Mol rare earths gold
Category.Catalyst amount is excessive not only to increase cost, but also may increase content of ashes in polymer product.Institute in the present invention
State ash content and refer to undecomposable component in polymerizate.
When the catalyst of the present invention is applied to conjugate diene polymerization, the method for the conjugate diene polymerization is referred to
Prior art is carried out, and is generally comprised：In the presence of the catalyst of the invention, conjugated diene is carried out in inert organic solvents
Polymerisation in solution, or enter under conditions of not described inert organic solvents or containing inert organic solvents presence described in very small amount
The polymerisation in bulk of row conjugated diene, those skilled in the art to this it is equal can know, will not be repeated here.
In the conjugated diene solution polymerization process, the organic solvent used is not particularly limited, this is can select
The field usually used aliphatic saturated hydrocarbon and/or alicyclic inert to reactive component, for example, can be C5-C10Straight chain alkane
Hydrocarbon and/or C5-C10Cycloalkane, typical organic solvent include but is not limited to hexane, hexamethylene, heptane, pentane, isopentane,
One or more in octane, hexahydrotoluene, benzene,toluene,xylene and isopropylbenzene.According to the present invention, the conjugated diene
The organic solvent used in hydrocarbon solution polymerization process can with the present invention rare earth compounding preparation process used in it is organic molten
Agent is identical or different.
During the conjugate diene polymerization, the conjugated diene can be conjugated diene commonly used in the art
Hydrocarbon, including but not limited to C4-C6Conjugated diene, for example can for butadiene, isoprene, 1,3-pentadiene, 1,3- oneself two
One or more in alkene, 2,3- dimethyl butadienes, preferably butadiene and/or isoprene.
During the conjugate diene polymerization, the condition of the polymerization is referred to prior art progress, preferably feelings
Under condition, the condition of the polymerization includes：The temperature of polymerization is subzero 30 DEG C to 80 DEG C above freezing, preferably subzero 20 DEG C to above freezing 70
DEG C, more preferably subzero 10 DEG C to 60 DEG C above freezing；The time of polymerization is 20-300 minutes, preferably 30-120 minutes.
As it was previously stated, during the conjugate diene polymerization, catalyst amount is generally being total to relative to every mole
Yoke alkadienes, usage amount is 1 × 10-6-4×10-4Mol rare earth metals, preferably 1.5 × 10-6-3.5×10-4Mol rare earth metals.
During the conjugate diene polymerization, living polymer can directly be entered using terminator commonly used in the art
Row terminate, the terminator for example can be water and/or alcoholic solvent, preferably water, methanol, ethanol, positive isopropanol, isopropanol and
One or more in 2,6- di-tert-butyl hydroquinone's methanol.
In addition, present invention also offers a kind of preparation method of rare-earth isoprene rubber, this method includes：In organic solvent
In the presence of and solution polymerization under the conditions of, isoprene is contacted with rare earth catalyst, wherein, the rare earth catalyst for
The above-mentioned rare earth catalyst provided is provided.
The theing improvement is that for preparation method for institute's rare-earth isoprene rubber that the present invention is provided is employed containing above-mentioned rare earth
The rare earth catalyst of complex, and it is used for species and solution polymerization condition of the organic solvent of isoprene polymerization etc.
Can be same as the prior art.
According to the present invention, the solution polymerization condition can be the conventional selection of this area, but in order to be had
The content of higher cis- Isosorbide-5-Nitrae, the solution polymerization condition can include：Temperature is 10-30 DEG C, and pressure is 0.15-
0.7MPa, the time is 20-300 minutes；The mol ratio of isoprene and rare earth compounding is 1：1×10-6-1×10-4。
Below by specific embodiment, the present invention will be described in detail, but the scope of the present invention is not limited to these implementations
Example.
If not otherwise specified, the chemical reagent used in embodiment is chemically pure reagent.
In the present invention, the microstructure of the conjugated diene polymer of synthesis is using in Germany Bruker Tensor27
Infrared spectrometer and Germany's Bruker400MHz nmr determinations, solvent is deuterochloroform；Molecular weight and molecualr weight distribution
Determined using Shimadzu LC-10AT types gel permeation chromatograph (GPC), THF is mobile phase, and Narrow distribution polystyrene is standard specimen, temperature
Spend for 25 DEG C.
In the present invention, the solvent and conjugated diene used in preparation process is handled by nitrogen deoxygenation, and aqueous solvent
Value is less than 10ppm.
In the present invention, solvent water number is referred to by weight, the water content in solvent.
In the present invention, monomer concentration refers to mass concentration of the conjugated diene monomer in polymerization system.
In the present invention, monomer conversion be concept well known to those skilled in the art, the present invention in, what monomer conversion referred to
It is the percentage that monomer is converted into polymer by polymerisation, it is generally the weight of straight polymer with entering polymerization workshop section
The ratio of monomer weight.In the present invention weight of straight polymer for polymer solution weight and polymer concentration product, its
In, the weight of polymer solution refers to not adding the weight of the polymer solution of terminator, and polymer concentration refers to pure poly-
Compound shared percentage by weight in a polymer solution.
In following examples, cis- Isosorbide-5-Nitrae structural content is carried out using Germany's Bruker400MHz NMRs in polymer
Determine, solvent is deuterochloroform；The weight average molecular weight and molecular weight distribution of polymer use the model LC- purchased from Shimadzu Corporation
10AT gel permeation chromatograph（GPC）It is measured, wherein, with
THF is mobile phase, using Narrow distribution polystyrene as standard specimen, and test temperature is 25 DEG C.
Preparation example 1
The preparation example is used to illustrate rare earth compounding of the invention provided and preparation method thereof.
At 20 DEG C, by Lu (CH2SiMe3)3(THF)217.41g (0.03mol) is added in 370mL toluene, then
Dropwise will dissolved with the tetrahydroquinoline of 8- (N-2,6- dimethyl) imido grpup 1,2,3,4- (GCH Technology Co., Ltd. produce,
7.92g, 0.03mol) toluene (150mL) solution be added to foregoing obtained 370mL dissolved with Lu (CH2SiMe3)3(THF)2In 17.41g (0.03mol) toluene solution, reacted at 20 DEG C after 1h, vacuum drains toluene, obtains oily residue, plus
Enter hexane, be filtered to remove insoluble matter, toluene is added into oily residue, obtain rare earth compounding Q1；
Analysis result is shown：
FD-Mass:697.3（calcd:697.3）
Elementary analysis:Measured value C:53.36%,H:7.23%,N:4.01
Theoretical value C:53.35%,H:7.22%, N:4.01%.It follows that rare earth compounding Q1 structural formula is：
Preparation example 2
The preparation example is used to illustrate rare earth compounding of the invention provided and preparation method thereof.
At 20 DEG C, by Sc (CH2SiMe3)3(THF)213.52g (0.03mol) is added in 370mL toluene, then
Dropwise will dissolved with the tetrahydroquinoline of 8- (N-2,6- dimethyl) imido grpup 1,2,3,4- (GCH Technology Co., Ltd. produce,
7.92g, 0.03mol) toluene (150mL) solution be added to foregoing obtained 370mL dissolved with Sc (CH2SiMe3)3(THF)213.52g (0.03mol) toluene solution, reaction solution is reacted after 1h at 20 DEG C, and vacuum drains toluene, obtains oily remaining
Thing, adds hexane, is filtered to remove insoluble matter, obtains rare earth compounding Q2；
Analysis result is shown：
FD-Mass:567.4（calcd:567.3）
Elementary analysis:Measured value C:65.57%,H:8.85%,N:4.92
Theoretical value C:65.57%,H:8.87%, N:4.93%.
It follows that rare earth compounding Q2 structural formula is：
Preparation example 3
The preparation example is used to illustrate rare earth compounding of the invention provided and preparation method thereof.
At 20 DEG C, by Lu (CH2SiMe3)3(THF)28.71g (0.015mol) is added in 370mL toluene, then
Dropwise will dissolved with the tetrahydroquinoline of 8- (N-2,6- diisopropyl) imido grpup 1,2,3,4- (GCH Technology Co., Ltd. produce,
9.66g, 0.03mol) toluene solution (150mL) be added to the foregoing obtained 370mL (CH containing Lu2SiMe3)3(THF)2In 17.41g (0.03mol) toluene solution, reaction solution is reacted after 1h at 20 DEG C, and vacuum drains toluene, obtains oily remaining
Thing, adds hexane, is filtered to remove insoluble matter, obtains rare earth compounding Q3；
Analysis result is shown：
FD-Mass:753.4（calcd:753.4）
Elementary analysis:Measured value C:55.76%,H:7.77%,N:3.73
Theoretical value C:55.75%,H:7.75%, N:3.72%.
It follows that rare earth compounding Q3 structural formula is：
Preparation example 4
The preparation example is used to illustrate rare earth compounding of the invention provided and preparation method thereof.
At 20 DEG C, by Sc (CH2SiMe3)3(THF)220.28g (0.045mol) is added to 370mL toluene, dropwise will be molten
Have the tetrahydroquinoline of 8- (N-2,6- diisopropyl) imido grpup 1,2,3,4- (GCH Technology Co., Ltd. produce, 9.66g,
Toluene solution 150mL 0.03mol) is added to foregoing obtained 370mL (CH containing Sc2SiMe3)3(THF)213.52g
In the toluene solution of (0.03mol), reacted at 20 DEG C after 1h, vacuum drains toluene, obtain oily residue, add hexane,
Insoluble matter is filtered to remove, rare earth compounding Q4 is obtained；
Analysis result is shown：
FD-Mass:623.5（calcd:623.4）
Elementary analysis:Measured value C:67.38%,H:9.39%,N:4.48%
Theoretical value C:67.37%,H:9.37%, N:4.49%.
It follows that rare earth compounding Q4 structural formula is：
Embodiment 1
The embodiment is used for the preparation for illustrating to carry out rare-earth isoprene rubber using the rare earth compounding Q1 prepared：
Sequentially added under nitrogen protection into 5L reactors 1800g hexanes, 300g (4.41mol) isoprene,
0.0302g (44.1 μm of ol) rare earth compounding Q1,0.0873g (441 μm of ol) triisobutyl aluminium, [Ph3C][B(C6F5)4]
0.0407g (44.1 μm of ol), after being reacted 2 hours under the conditions of 20 DEG C, polymer solution is released from kettle and 2,6- bis- is added
TBHQ ethanol solution terminating reaction.It is 64% to be computed conversion ratio.The cis- Isosorbide-5-Nitrae structural content of polymer is 97.3%,
Mn=62×104, Mw/Mn=1.17.
Embodiment 2
The embodiment is used for the preparation for illustrating to carry out rare-earth isoprene rubber using the rare earth compounding Q2 prepared：
Sequentially added under nitrogen protection into 5L reactors 1800g hexanes, 300g (4.41mol) isoprene,
0.0244g (44.1 μm of ol) rare earth compounding Q2,0.0873g (441 μm of ol) triisobutyl aluminium, [Ph3C][B(C6F5)4]
0.0407g (44.1 μm of ol), after being reacted 2 hours under the conditions of 20 DEG C, polymer solution is released from kettle and 2,6- bis- is added
TBHQ ethanol solution terminating reaction.It is 81% to be computed conversion ratio.The cis- Isosorbide-5-Nitrae structural content of polymer is 98.1%,
Mn=76×104, Mw/Mn=1.12.
Embodiment 3
The embodiment is used for the preparation for illustrating to carry out rare-earth isoprene rubber using the rare earth compounding Q3 prepared：
Sequentially added under nitrogen protection into 5L reactors 1800g hexanes, 300g (4.41mol) isoprene,
0.0327g (44.1 μm of ol) rare earth compounding Q3,0.0873g (441 μm of ol) triisobutyl aluminium, [Ph3C][B(C6F5)4]
0.0407g (44.1 μm of ol), after being reacted 2 hours under the conditions of 20 DEG C, polymer solution is released from kettle and 2,6- bis- is added
TBHQ ethanol solution terminating reaction.It is 55% to be computed conversion ratio.The cis- Isosorbide-5-Nitrae structural content of polymer is 98.0%,
Mn=81×104, Mw/Mn=1.23.
Embodiment 4
The embodiment is used for the preparation for illustrating to carry out rare-earth isoprene rubber using the rare earth compounding Q4 prepared：
Sequentially added under nitrogen protection into 5L reactors 1800g hexanes, 150g (2.21mol) isoprene,
0.0135g (22.1 μm of ol) rare earth compounding Q4,0.0873g (441 μm of ol) triisobutyl aluminium, [Ph3C][B(C6F5)4]
0.0407g (44.1 μm of ol), after being reacted 2 hours under the conditions of 20 DEG C, polymer solution is released from kettle and 2,6- bis- is added
TBHQ ethanol solution terminating reaction.It is 37% to be computed conversion ratio.The cis- Isosorbide-5-Nitrae structural content of polymer is 98.1%,
Mn=52×104, Mw/Mn=1.27.
Embodiment 5
The embodiment is used for the preparation for illustrating to carry out rare-earth isoprene rubber using the rare earth compounding Q2 prepared：
Using the preparation for the method progress rare-earth isoprene rubber for being embodiment 2, unlike, 2 are reacted under the conditions of -20 DEG C
Hour.It is 10% to be computed conversion ratio.The cis- Isosorbide-5-Nitrae structural content of polymer is 99%, Mn=91 × 104, Mw/Mn=1.13.
Embodiment 6
The embodiment is used for the preparation for illustrating to carry out rare-earth isoprene rubber using the rare earth compounding Q2 prepared：
Using the preparation for the method progress rare-earth isoprene rubber for being embodiment 2, unlike, 2 are reacted under the conditions of 0 DEG C small
When.It is 22% to be computed conversion ratio.The cis- Isosorbide-5-Nitrae structural content of polymer is 98.4%, Mn=84 × 104, Mw/Mn=1.16.
Embodiment 7
The embodiment is used for the preparation for illustrating to carry out rare-earth isoprene rubber using the rare earth compounding Q2 prepared：
Using the preparation for the method progress rare-earth isoprene rubber for being embodiment 2, unlike, react 30 under the conditions of 40 DEG C
Minute.It is 100% to be computed conversion ratio.The cis- Isosorbide-5-Nitrae structural content of polymer is 96.1%, Mn=53 × 104, Mw/Mn=2.22.
Embodiment 8
The embodiment is used for the preparation for illustrating to carry out rare-earth isoprene rubber using the rare earth compounding Q2 prepared：
Using the preparation for the method progress rare-earth isoprene rubber for being embodiment 2, unlike, react 10 under the conditions of 80 DEG C
Minute.It is 100% to be computed conversion ratio.The cis- Isosorbide-5-Nitrae structural content of polymer is 93.2%, Mn=47 × 104, Mw/Mn=2.56.
Embodiment 9
The embodiment is used for the preparation for illustrating to carry out rare-earth isoprene rubber using the rare earth compounding Q2 prepared：
Using the preparation for the method progress rare-earth isoprene rubber for being embodiment 2, unlike, it is anti-to 5L under nitrogen protection
Answer sequentially added in kettle 1800g hexanes, 450g (6.61mol) isoprene, 0.357g (661 μm of ol) rare earth compounding 2,
[Ph3C][BC6F5]4] 0.407g (441 μm of ol), after being reacted 2 hours under the conditions of 20 DEG C, polymer solution is released from kettle
And add 2,6- di-tert-butyl hydroquinone's ethanol solution terminating reactions.Polymer solution is released, solid is obtained with Ethanol Treatment
Polymer, is then placed in vacuum drying oven drying to constant weight by polymer.It is 29% to be computed conversion ratio.Cis- 1,4 structure of polymer
Content is 98.0%, Mn=66 × 104, Mw/Mn=1.18.
Data above shows, using the catalyst of the present invention, by suitably adjusting polymerizing condition, can also take into account high
While conversion ratio, the cis- Isosorbide-5-Nitrae structural content of polymer is set to be up to more than 98%.
Claims (16)
1. a kind of rare earth compounding, it is characterised in that the rare earth compounding has the structure shown in formula (I)：
Wherein, R1、R2And R3It is identical and for hydrogen or C1-C20Alkyl；Ln is one kind in rare earth metal, and THF represents tetrahydrofuran,
Me represents methyl.
2. rare earth compounding according to claim 1, wherein, R1、R2And R3For hydrogen or C1-C4Alkyl.
3. rare earth compounding according to claim 1, wherein, Ln is Sc or Lu or Y.
4. a kind of preparation method of rare earth compounding, this method is included in the bar of the rare earth compounding of structure shown in production (I)
Under part, it is Ln (CH with formula that will have the compound of structure shown in formula (II)2SiMe3)3(THF)2Compound in organic solvent
Middle contact,
Wherein, R1、R2And R3It is identical and for hydrogen or C1-C20Alkyl；Ln is one kind in rare earth metal, and THF represents tetrahydrofuran,
Me represents methyl.
5. preparation method according to claim 4, wherein, compound and Ln with structure shown in formula (II)
(CH2SiMe3)3(THF)2Compound mol ratio be 1：0.5-1.5.
6. the preparation method according to claim 4 or 5, wherein, Ln is Sc or Lu or Y.
7. preparation method according to claim 6, wherein, the bar of the rare earth compounding of structure shown in the production (I)
Part is -20 DEG C to 60 DEG C including reaction temperature, the reaction time is 4-16 hours.
8. preparation method according to claim 4, wherein, R1、R2It is hydrogen or C with R1-C4Alkyl.
9. a kind of rare earth catalyst, the catalyst contains boride and rare earth compounding, it is characterised in that the rare earth compounding
For the rare earth compounding described in any one in claim 1-3.
10. catalyst according to claim 9, wherein, the mol ratio of the rare earth compounding and boride is 1：0.9-
1.1。
11. the catalyst according to claim 9 or 10, wherein, the boride is selected from [Ph3C][B(C6F5)4]、
[PhMe2NH][B(C6F5)4] and B (C6F5)3In one or more.
12. the catalyst according to claim 9 or 10, wherein, the catalyst also contains alkyl aluminum and/or alkyl hydrides
Aluminium.
13. catalyst according to claim 12, wherein, the molal quantity of the alkyl aluminum and/or alkyl aluminium hydride with it is dilute
The ratio of the molal quantity of native complex is 10-50：1.
14. application of the rare earth catalyst in claim 9-13 described in any one in conjugate diene polymerization.
15. a kind of preparation method of rare-earth isoprene rubber, this method includes：In presence of organic solvent and solution polymerization
Under the conditions of, isoprene is contacted with rare earth catalyst, it is characterised in that the rare earth catalyst is in claim 9-13
Rare earth catalyst described in meaning one.
16. method according to claim 15, wherein, it is 10-30 DEG C that the solution polymerization condition, which includes temperature, pressure
Power is 0.15-0.7MPa, and the time is 20-300 minutes.
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