CN105085757B - A kind of ethylene-alpha-olefin non-conjugated diene hydrocarbon copolymer and preparation method thereof - Google Patents
A kind of ethylene-alpha-olefin non-conjugated diene hydrocarbon copolymer and preparation method thereof Download PDFInfo
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Abstract
The invention discloses ethylene-alpha-olefin non-conjugated diene hydrocarbon copolymer prepared by a kind of preparation method of ethylene-alpha-olefin non-conjugated diene hydrocarbon copolymer and this method.This method includes：(1) non-conjugated diene hydrocarbon or dilution containing non-conjugated diene hydrocarbon are contacted with nano silicon alumina adsorbant, obtains the reaction material of the hydrocarbon containing non-conjugated diene, the impurity content in the reaction material is below 5ppm；(2) in the presence of polymerization catalyst, hydrogen and solvent, reaction material and ethene, alhpa olefin that step (1) is obtained carry out polymerisation.This method can reduce the impurity content in non-conjugated diene hydrocarbon, improve the conversion ratio of non-conjugated diene hydrocarbon, improve the catalytic efficiency in ethene, alhpa olefin and non-conjugated diene hydrocarbon copolyreaction, reduce the gel content in polymer solution.
Description
Technical field
The present invention relates to a kind of ethylene-alpha-olefin-non-conjugated diene hydrocarbon copolymer and preparation method thereof, in particular it relates to one
Kind ethylene-propylene-(5- ethylidene -2- ENBs) copolymer and preparation method thereof.
Background technology
Ethylene propylene diene rubber (EPDM) is typically in Ziegler-receive by ethene, propylene and a small amount of non-conjugated diene monomers
Under tower catalyst system and catalyzing, the terpolymer prepared is copolymerized by solution or suspension polymerization.In EPDM structure, ethene-
Propylene monomer forms the saturation main chain of copolymer, and the main chain is random rubber elastomer.In order that the rubber elastomer can
Vulcanized or be crosslinked, non-conjugated diene hydrocarbon is introduced on the saturation main chain, EPDM is provided with the crosslinking points for being available for vulcanization, assigned
Give unique elastic and very strong heat-resisting, the resistance to ozone of EPDM, resist cold and ability resistant to chemical etching.From EPDM realize commercialization with
Come, its application field is constantly expanded.
For the non-conjugated diene monomers in EPDM, tens kinds of monomers were once soundd out, but commercial applications is main
There are dicyclopentadiene (DCPD) and ethylidene norbornene (also known as 5- ethylidene -2- ENBs, ENB).Wherein ENB is current
The non-conjugated diene that EPDM first choices use, its advantage are that curingprocess rate is fast, be that curingprocess rate is most fast in all Third monomers one
Kind.Thus obtained vulcanizate tensile strength is high, and permanent deformation is small.
But usually contain impurity in the non-conjugated diene monomers used in prior art, such as ethylidene norbornene
It is active to learn property, is easy to that oxidation deterioration occurs at normal temperatures with air contact, generation oxide, peroxide are anti-during high temperature
Should be more serious.Autohemagglutination easily occurs in itself for ethylidene norbornene simultaneously, generates dimerization and polymer.Therefore in storage ethylidene drop ice
Usually require to completely cut off air and Cord blood during piece alkene, typically also need to add phenolic inhibitor, such as p-methyl phenol, the tert-butyl group
Catechol, hydroquinones etc..In addition, during preparing ethylidene norbornene, obtained reaction product is complicated, it will usually contains
There are the accessory substances such as the dimer of unreacted monomer and monomer.
When non-conjugated diene hydrocarbon such as ENB are as important Third monomer in EPDM building-up processes, it is necessary to meet very tight
The quality standard of lattice, because the accessory substance wherein contained, polymerization inhibitor and minor amount of water can reduce the catalysis of ziegler-natta catalyzed system
Efficiency, polymerisation is influenceed, and easily cause polymerization process to produce gel, be unfavorable for the raising of ENB conversion ratios, cause to obtain
Cured properties it is bad.
US20090312511A1 discloses a kind of polymerization containing ethene, at least one alpha-olefin and 5- vinyl -2- drop ice
The method of the mixture of piece alkene, wherein 5- vinyl -2- ENBs contain a small amount of impurity, can be by UV absorption spectrums in 320nm
Impurity content in ENB is detected with the absorption intensity at 343nm.It is real because ENB itself and oxygen in air reactivity are higher
Starvation is needed to be analyzed in the operation of border.
Other method prior arts for improving ENB conversion ratios, which also disclose, can use multistage reactor.US3629212 is public
A kind of polymerization is opened, this method is implemented at least three continuous reactors, and this method is in ziegler-natta catalyzed
Carried out in the presence of agent, accelerator and sulfide.US4016342 discloses the elastocopolymer of ethene and C3-C10 alpha-olefin
Continuous preparation method, wherein there can be non-conjugated diene hydrocarbon, prepared in two tandem reactors.Product point prepared by the method
Son amount wider distribution, forms narrowly distributing.US4306041 discloses the elastic ternary polymerization of ethene, alhpa olefin and non-conjugated diene hydrocarbon
The preparation method of thing, it is polymerize using Ziegler-Natta catalyst in tandem reactor, then is passed through second reactor and continues to polymerize
To improve di-olefins rate.
The method that CN1284051A discloses murifying norbornene, its crude product mixture include：Light impurities, its boiling point
Less than the boiling point of ENB；Middle heavy impurity, its boiling point is between ENB boiling point and ethyl norbornene boiling point；Heavy
Impurity, its boiling point are higher than the boiling point of ethyl norbornene；And ethyl norbornene is also included in the heavy impurity, its feature
It is：The first time distillation of crude product mixture is completed in except tailing column (C1), deviates from heavy in part heavy impurity and part
Impurity；Then second of distillation that the crude mixture after tail is removed to it is completed in topping tower (C2), deviates from light impurities；Topping
The third time distillation of mixture afterwards is then completed in except tailing column (C3), deviates from heavy and heavy impurity in remaining.Should
Invention mainly passes through murifying norbornene by distillation.But this method processing speed is slow, treating capacity is small, energy consumption is big, it is difficult to meet
Needed in pilot-scale or industrial production.
The method for adding the material that can be chemically reacted with impurity can also be used, but this method is readily incorporated newly
Impurity, be unfavorable for ziegler-natta catalyzed polymerisation.
As can be seen that prior art can not still reduce impurity content in non-conjugated diene hydrocarbon well, ethene-α alkene is overcome
In hydrocarbon-non-conjugated diene hydrocarbon copolymer preparation process, catalytic efficiency is low, non-conjugated diene hydrocarbon conversion rate is low, product gel content
The shortcomings that high, therefore, it is necessary to the method for preparing ethylene-alpha-olefin-non-conjugated diene hydrocarbon copolymer newly.
The content of the invention
The invention aims to overcome, above-mentioned prior art catalytic efficiency is low, non-conjugated diene hydrocarbon conversion rate is low, production
A kind of the shortcomings that product gel content is high, there is provided ethylene-alpha-olefin-non-conjugated diene hydrocarbon copolymer and preparation method thereof.
To achieve these goals, the present invention provides a kind of preparation side of ethylene-alpha-olefin-non-conjugated diene hydrocarbon copolymer
Method, this method include：(1) by non-conjugated diene hydrocarbon or the dilution containing non-conjugated diene hydrocarbon and nano silicon-oxidation
Aluminium adsorbent contacts, and obtains the reaction material of the hydrocarbon containing non-conjugated diene, and the impurity content in the reaction material is below 5ppm；(2)
In the presence of polymerization catalyst, hydrogen and solvent, the reaction material that step (1) contact obtains with ethene, alhpa olefin polymerize instead
Should.
Present invention also offers ethylene-alpha-olefin made from preparation method provided by the present invention-non-conjugated diene hydrocarbon copolymerization
Thing, wherein, in the ethylene-alpha-olefin-non-conjugated diene hydrocarbon copolymer, on the basis of the gross weight of the copolymer, ethylene unit list
The content of member is 25-85 weight %, and the content of alhpa olefin construction unit is 10-70 weight %, non-conjugated diene hydrocarbon structure unit
Content is 1-20 weight %；The content of optimal ethylene construction unit is 40-75 weight %, and the content of alhpa olefin construction unit is 20-
45 weight %, the content of non-conjugated diene hydrocarbon structure unit is 1-10 weight %.
The preparation method of ethylene-alpha-olefin provided by the invention-non-conjugated diene hydrocarbon copolymer, participation polymerization can be reduced
Impurity content in the non-conjugated diene hydrocarbon reaction material of reaction, the conversion ratio of non-conjugated diene hydrocarbon is improved, improve ethene, alhpa olefin
With the catalytic efficiency in non-conjugated diene hydrocarbon copolyreaction, the gel content in polymer solution is reduced.
The present invention uses nano silicon-alumina adsorbant, it is possible to achieve the impurity in absorption non-conjugated diene hydrocarbon
Continuous operation, not producing needs waste liquid to be processed and solid waste, can meet economic and environmental requirement.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The present invention provides a kind of preparation method of ethylene-alpha-olefin-non-conjugated diene hydrocarbon copolymer, and this method includes：(1)
Non-conjugated diene hydrocarbon or the dilution containing non-conjugated diene hydrocarbon are contacted with nano silicon-alumina adsorbant, obtained
The reaction material of the hydrocarbon containing non-conjugated diene, the impurity content in the reaction material is below 5ppm；(2) in polymerization catalyst, hydrogen
In the presence of solvent, reaction material and ethene, alhpa olefin that step (1) is obtained carry out polymerisation.
In method provided by the invention, by using nano silicon-alumina adsorbant, adsorbing and removing non-conjugated two
Impurity in alkene.It is described to receive on the basis of the gross weight of the nano silicon-alumina adsorbant under preferable case
Rice silica-alumina adsorbent contains 5-15 weight % silica, 85-95 weight % aluminum oxide；The nanometer
The aperture of silica-alumina adsorbent is 2-8nm, the inner ratio surface area of the nano silicon-alumina adsorbant
Account for the 75-90% of total specific surface area of the nano silicon-alumina adsorbant.
In the case of, according to the invention it is preferred to, the nano silicon-alumina adsorbant can be made by the following method
It is standby：(a) activated alumina is dried；(b) that silicate, inorganic acid and surfactant are mixed to get into nano silicon is molten
Liquid, the pH value of the solution is 7-9；(c) in a heated condition, the activated alumina that step (a) is dried is prepared with step (b)
Nanosilica solution mixes.
In the case of, according to the invention it is preferred to, the average grain diameter of the activated alumina is 3-5mm, specific surface area 280-
360m2/g.The particle diameter can be measured by light microscope.Specific surface area can pass through low-temperature physics adsorption capacity method side
Method, using U.S. Micromeritics companies PRISTAR-3000 type Determination of Specific Surface Area instrument, using high pure nitrogen as adsorbate, root
Carry out the adsorbance of determination sample according to pressure balanced change, specific surface area is calculated by BET equations.The condition of the drying can be with
It is the condition being routinely dried in this area, such as temperature can be 150-300 DEG C, the time can be 3-6 hours.
According to the present invention, in the preparation method of the nano silicon-alumina adsorbant, step (b) can be used for
Prepare nanosilica solution, under preferable case, the silicate can be selected from the silicic acid of alkali metal and/or alkaline-earth metal
Salt, preferably sodium metasilicate；The surfactant can be nonionic surfactant, and preferably described surfactant is with logical
Formula R-O- (CH2CH2O)n- H represent AEO, wherein, R be C12-C18 saturation or undersaturated straight chain or
Branched alkyl, n 5-20, preferred surfactant are that R is C12, and the AEO that n is 10-15 (is commonly called as
AEO)；The inorganic acid is selected from least one of hydrochloric acid, sulfuric acid and nitric acid, preferably hydrochloric acid.
In the present invention, in the preparation method of the nano silicon-alumina adsorbant, the nanometer of step (b) preparation
The average grain diameter of nano silicon in silicon dioxde solution is surveyed by Japanese JEOL companies 6301F types field emission scanning electron microscope
, test condition includes：Test voltage 20KV, operating distance 9mm, 100,000 times of multiplication factor.
According to the present invention, in the preparation method of the nano silicon-alumina adsorbant, under preferable case, step
(c) temperature of the heating is 100-140 DEG C.
In the present invention, the preparation method of the nano silicon-alumina adsorbant is additionally may included in step (c)
After the mixing, the sediment being mixed to get is centrifuged, washed, drying process, obtained nano silicon-aluminum oxide and inhale
Attached dose.The obtained scanned electron microscopy of adsorbent is being surveyed using the field emission scanning electron microscope of Japanese JEOL companies 6301F models
Voltage 20KV, operating distance 9mm are tried, determines pore structure under the conditions of 100,000 times of multiplication factor, the average pore size that there can be 2-8nm；
U.S. Micromeritics companies PRISTAR-3000 type Determination of Specific Surface Area instrument is used through BET nitrogen adsorption methods, with high pure nitrogen
For adsorbate, changed according to pressure balanced come the adsorbance of determination sample, pass through the internal ratio surface that BET equations determine adsorbent
Product and total specific surface area, are calculated the 75-90% that inner ratio surface area accounts for total specific surface area.
In the above method provided by the invention, in the reaction material that the obtained hydrocarbon containing non-conjugated diene is handled through step (1)
The content of impurity can use ultraviolet-visible spectrophotometry, true for absorption intensity at 320nm and 343nm by determining wavelength
It is fixed.The impurity content in the reaction material of the hydrocarbon containing non-conjugated diene can also be determined by using gas chromatography, it is preferred to use gas
Phase chromatography, this method include the Ov-1 fused-silica capillary columns that length is 30m, internal diameter 0.32nm, and thickness of liquid film is
0.25μm.It can also be the chromatographic column that other can reach equal separating effect.Chromatographic condition：Injector temperature is 250-290 DEG C；
Detector temperature is 250-290 DEG C；Column temperature is 100-200 DEG C；Column flow rate is 1-2ml/min DEG C.Calculated and determined using external standard method
Impurity content.
In the preparation method of ethylene-alpha-olefin provided by the invention-non-conjugated diene hydrocarbon copolymer, step (1) is realized, can
So that non-conjugated diene hydrocarbon directly to be contacted with nano silicon-alumina adsorbant, such as it is carried out in a batch mode contact；
Non-conjugated diene hydrocarbon first processing be can be diluted with retarder thinner, the concentration of non-conjugated diene hydrocarbon, obtained dilution reduced
Liquid may be at relatively low range of viscosities, be advantageous to dilution when being contacted with nano silicon-alumina adsorbant in the suction
Mass transfer in attached dose of duct, increase the rate of adsorption, such as contact in a continuous manner.Under preferable case, step (1) is described
The temperature of contact is 0-30 DEG C, and the concentration of non-conjugated diene hydrocarbon described in the dilution is 20-80 volumes %；It is preferred that described connect
Tactile temperature is 15-25 DEG C, and the concentration of non-conjugated diene hydrocarbon described in the dilution is 30-60 volumes %.In above-mentioned dilution
Under the concentration of liquid, the non-conjugated diene hydrocarbon in the dilution can have more preferable adsorption effect, and adsorbent regenerating easily
Processing.The retarder thinner can be non-polar hydrocarbon solvent, for example, can be selected from benzene, toluene, ethylbenzene, dimethylbenzene, pentane,
At least one of n-hexane, normal heptane, normal octane and hexamethylene, preferably can be in n-hexane, normal octane and normal heptane
At least one, more preferably described retarder thinner is n-hexane.
According to the present invention, the mode contacted described in step (1) can be intermittent mode, or continuation mode.When
When the mode of the contact is intermittent mode, per non-conjugated diene hydrocarbon described in ml using 0.2-1g the nano silicon-
Oxidant adsorbent.The continuation mode can be to accumulate to form nanometer titanium dioxide by nano silicon-alumina adsorbant
Silicon-alumina adsorption post, make the dilution containing non-conjugated diene hydrocarbon by nano silicon-alumina adsorbant post, can
To be continuously by the adsorption column by dilution.Under preferable case, the mode of step (1) described contact is described dilute to make
Liquid is released by nano silicon-alumina adsorbant post, the volume space velocity of the dilution is 0.5-10h-1, it is preferably described dilute
The volume space velocity for releasing liquid is 1-5h-1.Under this contact conditions, it is possible to achieve the dilution of the hydrocarbon containing non-conjugated diene is continuously inhaled
It is attached, it is advantageously implemented industrialization continuous operation.
In the case of, according to the invention it is preferred to, the non-conjugated diene hydrocarbon be 5- methyl -2,5- ENB, 5- methylene -
2- ENBs, 5- ethylidene -2- ENBs, 1,4- hexadienes, 2- methyl isophthalic acids, 4- hexadienes, 1,6- octadienes and bicyclic
At least one of pentadiene；It is preferred that the non-conjugated diene hydrocarbon is 5- ethylidene -2- ENBs.
In the preparation method of ethylene-alpha-olefin provided by the invention-non-conjugated diene hydrocarbon copolymer, step (2) can be realized
The copolymerization of ethylene-alpha-olefin-non-conjugated diene hydrocarbon, wherein, under preferable case, the alhpa olefin is C3-C12 alhpa olefin；
It is preferred that alhpa olefin is C3-C8 alhpa olefin, such as propylene, 1- butylene, 1- hexenes or 1- octenes；More preferably alhpa olefin is propylene.
According to the present invention, the polymerization catalyst can be that of the prior art various can be used for ziegler-natta catalyzed
The catalyst of system.Under preferable case, the polymerization catalyst contains vfanadium compound and organo-aluminum compound, organic calorize
Compound is chlorinated organo-aluminium, can be selected from a chlorine diethyl aluminum chloride, a Chlorodimethyl aluminium, ethyl aluminum dichloride, the isobutyl of a chlorine two
At least one of base aluminium, ethyl aluminium sesquichloride and methylaluminum sesquichloride, preferably described organo-aluminum compound are a chlorine two
At least one of aluminium ethide, ethyl aluminum dichloride and ethyl aluminium sesquichloride.The organo-aluminum compound is co-catalyst.
According to the present invention, the vfanadium compound in the polymerization catalyst can be the various polymerizations that can complete step (2)
The vfanadium compound of reaction, such as《Macromolecular》(D.L.Christman,G.I.Kein,Macromolecules,1968,1,
358) disclosed in various vfanadium compound catalyst.Under preferable case, the vfanadium compound is vanadium trichloride, vanadium tetrachloride, three
At least one of chlorine vanadyl, vanadium triacetylacetonate, diacetyl acetone vanadyl, triethoxy vanadyl and two chloroethoxy vanadyl,
It is preferred that the vfanadium compound is vanadium oxytrichloride.The vfanadium compound is major catalyst.
According to the present invention, although organo-aluminum compound can be poly- with the realization of various mol ratios with vfanadium compound in the prior art
Reaction is closed, it is preferred that in the case of, the organo-aluminum compound in terms of aluminium element and the vfanadium compound in terms of v element
Mol ratio be 1-1000:1, preferably 2-300：1, more preferably 5-80：1.
In the present invention, after the organo-aluminum compound and vfanadium compound can be by being dissolved in aliphatic or aromatic hydrocarbon solvent
Carry out polymerisation is added again.The aliphatic or aromatic hydrocarbon solvent are inertia generally to the polymerization catalyst, can preferably with
The solvent of polymerisation is identical.Organo-aluminum compound and vfanadium compound can respectively or both mixture form addition.Have
It can add organo-aluminum compound and vfanadium compound with the order of priority that machine aluminium compound and vfanadium compound add respectively,
It can be organo-aluminum compound and vfanadium compound while add.
According to the present invention, the polymerisation can be solution polymerization, can also may be used by the way of batchwise polymerization
Realized in a manner of using continuous polymerization.Under preferable case, the condition of polymerisation includes described in step (2)：Based on described
The volume of solvent, the content for the vfanadium compound counted using v element is 0.01-0.5mmol/L, preferably 0.1-0.3mmol/L；α alkene
The mol ratio of hydrocarbon and ethene is 1-5：1, preferably 2-4:1；The mol ratio of non-conjugated diene hydrocarbon and ethene is 0.015-0.05：1.
According to the present invention, the dosage of the solvent can carry out the conventional amount used of solution polymerization, and it is anti-to meet polymerization
The requirement answered.Under preferable case, the condition of polymerisation also includes described in step (2)：Gross weight based on the solvent
Measure, the total concentration of non-conjugated diene hydrocarbon is 5-30 weight %, preferably 8-10 weight % in ethene, alhpa olefin and the reaction material.
Heretofore described solvent can be not polymerize with what each component and polymerisation of participation polymerisation obtained
Thing has chemical reaction effect.The solvent can be with solvent known to those skilled in the art.For the purpose of the present invention, it is described molten
Agent can be non-polar hydrocarbon solvent, and not restricted citing can be benzene, toluene, ethylbenzene, dimethylbenzene, pentane, n-hexane, just
At least one of heptane, normal octane and hexamethylene, preferably can be in n-hexane, normal octane and normal heptane at least one
Kind, more preferably described solvent is n-hexane.
According to the present invention, the polymerisation can use molecule of the hydrogen as molecular weight regulator control copolymer
Amount, the conventional hydrogen usage in this area can be used.Under preferable case, the condition of polymerisation also includes described in step (2)：
Based on the cumulative volume of non-conjugated diene hydrocarbon in ethene, alhpa olefin and the reaction material, the dosage of the hydrogen is 0.01-10 bodies
Product %, preferably 0.02-5 volumes %.
In the case of, according to the invention it is preferred to, the temperature of polymerisation described in step (2) is -40 DEG C to 80 DEG C, preferably institute
The temperature for stating polymerisation is 10-50 DEG C；The pressure of the polymerisation is 0.1-5MPa, the pressure of preferably described polymerisation
For 0.1-2MPa.
In the present invention, step (2) is obtained in the solution of copolymer under the above-mentioned conditions of polymerization, ethylene-alpha-olefin copolymerization
The concentration of thing can be 5-15 weight %, preferably can be 6-9 weight %.
Present invention also offers ethylene-alpha-olefin made from preparation method provided by the present invention-non-conjugated diene hydrocarbon copolymerization
Thing, wherein, in the ethylene-alpha-olefin-non-conjugated diene hydrocarbon copolymer, on the basis of the gross weight of the copolymer, ethylene unit list
The content of member is 25-85 weight %, and the content of alhpa olefin construction unit is 10-70 weight %, non-conjugated diene hydrocarbon structure unit
Content is 1-20 weight %；The content of optimal ethylene construction unit is 40-75 weight %, and the content of alhpa olefin construction unit is 20-
45 weight %, the content of non-conjugated diene hydrocarbon structure unit is 1-10 weight %.
The present invention will be described in detail by way of examples below.
In following examples, the impurity content in the reaction material of non-conjugated diene hydrocarbon and the hydrocarbon containing non-conjugated diene is prompt using peace
The type gas chromatograph for determination of human relations company 6890.
The conversion ratio of non-conjugated diene hydrocarbon is analyzed with the following method：
Take copolymerization composition glue liquid sample, by its in vacuum drying chamber with 50 DEG C of dryings, drying sample is used into nuclear magnetic resonance
The hydrocarbon content for the non-conjugated diene that hydrogen spectrum (Bruker company DRX400) measure wherein combines, then divided by addition progress polymerisation
Non-conjugated diene hydrocarbon feed amount, obtain the conversion ratio of non-conjugated diene hydrocarbon.
Gel content is analyzed with the following method：
Take copolymerization composition glue liquid sample, by its in vacuum drying chamber with 50 DEG C of dryings, weigh and be calculated as W0.Then with decahydronaphthalene
Make solvent and dissolving is shaken at 135 DEG C.Lysate is filtered with the stainless (steel) wire of aperture (200 mesh), will be remained on stainless (steel) wire
Undissolved polymer in vacuum drying chamber at 100 DEG C dry 4 hours, weigh and be calculated as W1.Calculate W1/W0× 100%, obtain
Go out gel content.
Catalytic efficiency is calculated as follows：
In copolymer dry glue weight (g)/unit interval that polymerization obtains in catalytic efficiency=unit interval in terms of v element
Vfanadium compound addition (g) × 100%.
Ethylene unit unit, alhpa olefin construction unit and non-conjugated diene in ethylene-alpha-olefin-non-conjugated diene hydrocarbon copolymer
The content of hydrocarbon structure unit is obtained by magnetic nuclear resonance method using Bruker companies DRX400 type nmr determinations.
The pore structure of nano silicon-alumina adsorbant scans electricity by Japanese JEOL companies 6301F types Flied emission
Mirror measures average pore size, and (test condition includes：Test voltage 20KV, operating distance 9mm, 100,000 times of multiplication factor)；Pass through BET
Nitrogen adsorption methods (U.S. Micromeritics companies PRISTAR-3000 type Determination of Specific Surface Area instrument) measure nano silicon-
The inner ratio surface area of alumina adsorbant and total specific surface area, determine that inner ratio surface area accounts for the percentage of total specific surface area.Nanometer
The composition of silica-alumina adsorbent determines (test voltage 20KV, work by Japanese linkisis-300 types energy disperse spectroscopy
Distance 9mm).
Preparation example
This preparation example illustrates the preparation method of nano silicon-alumina adsorbant of the present invention.
(1) activated alumina for taking 10g BASF AG to produce, average grain diameter is 4mm, specific surface area 320m after measured2/
g.The activated alumina is dried 5 hours at 200 DEG C, as DB-1 is standby.
(2) Na that 150ml concentration is 10% is taken2SiO2Solution, thereto be added dropwise concentration be 1 weight % hydrochloric acid solution and
The AEO AEO (Jiangsu Hai'an petrochemical plant produces, trade mark AEO-3) that concentration is 5 weight %, mixes and controls
The pH for making the mixture is 8, obtains nanosilica solution.Nano silicon in the solution is determined by ESEM
Average grain diameter is 5nm.
(3) in the case where heating-up temperature is 120 DEG C, the activated alumina DB-1 in (1) is added into (2) and obtains nano silicon
Be thoroughly mixed in solution, and by the sediment being mixed to get centrifugation, washing, dry be thermally treated resulting in nano silicon-
Alumina adsorbant, as adsorbent S-1.
The average pore size that adsorbent S-1 is determined by ESEM is 3nm, and adsorbent is determined using BET nitrogen adsorption methods
S-1 inner ratio surface area and total specific surface area, inner ratio surface area is calculated and accounts for total specific surface area as 80%.
Measure adsorbent S-1 composition is that the content of silica is 10 weight %, and the content of aluminum oxide is 90 weight %.
Adsorb test case 1
This absorption test case illustrates non-conjugated diene hydrocarbon provided by the invention and nano silicon-oxygen provided by the invention
Change the method for aluminium adsorbent contact.
The effect that measure is adsorbed with intermittent mode.
In the case where temperature is 25 DEG C, 50g adsorbent S-1 is added in 100ml 5- ethylidene -2- ENBs and contacted,
And determined using gas chromatography under different times of contact, the content of impurity in 5- ethylidene -2- ENBs.It the results are shown in Table 1.
Contrast absorption test case 1
According to the method for absorption test case 1, the difference is that, with " 50g DB-1 ", replacement " 50g adsorbent S-1 ".
Under the different times of contact of measure, the content results of impurity are shown in Table 1 in 5- ethylidene -2- ENBs.
Table 1
It can be seen that from the data result of table 1 and handle 5- ethylidene -2- ENBs only with activated alumina DB-1
(ENB), 4 days rear impurity contents are down to 40-50ppm, do not continue to reduce；Using nano silicon-alumina adsorbant S-1
ENB is handled, after 4 days, impurity content is down to 24ppm, continues with to 7 days and can not detect impurity.Illustrate nano silicon-oxygen
The impurity removed in ENB can more effectively be realized by changing aluminium adsorbent.
Adsorb test case 2
This absorption test case illustrates non-conjugated diene hydrocarbon provided by the invention and nano silicon-oxygen provided by the invention
Change the method for aluminium adsorbent contact.
Determine the effect contacted in a continuous manner.
100g adsorbent S-1 is loaded into adsorption column, forms nano silicon-alumina adsorbant S-1 adsorption column,
Volume is about 0.2 liter.
5- ethylidene -2- ENBs and n-hexane solvent are diluted, the concentration for obtaining 5- ethylidene -2- ENBs is
20 weight % dilution.
It is 1h by the volume space velocity of dilution in the case where temperature is 25 DEG C-1, dilution is contacted with adsorbent S-1, and determines
The impurity content for the liquid that contact is flowed out after 1 hour from adsorption column, the results are shown in Table 2.
Adsorb test case 3-5
According to the method for absorption test case 2, the difference is that, respectively with " concentration of 5- ethylidene -2- ENBs is 30 weights
Amount % dilution ", " concentration of 5- ethylidene -2- ENBs is 40 weight % dilution " and " 5- ethylidene -2- drop ice
The concentration of piece alkene is 50 weight % dilution ", " concentration of 5- ethylidene -2- ENBs is 20 weight % dilution to replacement
Liquid ".It is diluted the absorption of liquid.
Measurement result is shown in Table 2.
Contrast absorption test case 2-5
According to absorption test case 2-5 method, the difference is that, with " 100g DB-1 ", replacement " 100g adsorbent S-
1”.It is diluted the absorption of liquid.
Measurement result is shown in Table 2.
Table 2
As can be seen from Table 2, it is bright using nano silicon-continuous adsorption effect of alumina adsorbant S-1 progress
The aobvious adsorption effect being better than using aluminum oxide.Compared with the result of table 1, and it is more preferable using the continuous adsorption effect of dilution.
Embodiment 1
This example demonstrates that the preparation method of ethylene-alpha-olefin-non-conjugated diene hydrocarbon copolymer of the present invention.
(1) adsorbing contaminant.According to the method for absorption test case 2, the refined 5- ethylidene -2- that impurity content is 3ppm is obtained
ENB reaction material A.
(2) intermittent polyreaction.200mL n-hexanes solvent and 10ml 5- ethylidene -2- are added into 0.5L polymeric kettles
ENB reaction material A, it is continuously added to by volume 1：1.5：Ethene, propylene, the hydrogen gas mixture of 0.4 composition, in temperature
Mixed 20 minutes under 20 DEG C and pressure 0.5MPa.Vanadium oxytrichloride 0.04mmol is added, adds sesquialter ethylmercury chloride aluminium
0.8mmol.Control reaction temperature in polymeric kettle constant at 20 DEG C, reaction pressure 0.5MPa, and with 2 marks liter/min to poly-
Close in kettle and add mixed gas.After polymerisation 30 minutes, stop conveying mixed gas and stirring, remove ethene and propylene.Add
Enter ethanol 10ml and terminate polymerisation, add 0.1 weight % of copolymer weight (being calculated by feeding intake) age resistor
Irganox1520 hexane solution.By obtained polymer solution through condensing, being dried to obtain polymerizate EPDM-1.
Experimental result is shown in Table 3.
Embodiment 2
This example demonstrates that the preparation method of ethylene-alpha-olefin-non-conjugated diene hydrocarbon copolymer of the present invention.
(1) adsorbing contaminant.According to the method for absorption test case 2, the refined 5- ethylidene -2- that impurity content is 3ppm is obtained
ENB reaction material A.
(2) continuous polymerization is reacted.N-hexane solvent (6kg/h), second are continuously passed through into polymeric kettle from 5L polymeric kettles bottom
Alkene (0.2kg/h), propylene (0.35kg/h), 5- ethylidene -2- ENB reaction material A (0.02kg/h) and hydrogen (0.001g/
h).Vanadium oxytrichloride solution and sesquialter ethylmercury chloride aluminum solutions are added into polymeric kettle, wherein trichlorine simultaneously with 0.5L/h speed respectively
Vanadyl is 0.6g/h, and sesquialter ethylmercury chloride aluminium is 2.5g/h, starts polymerisation.Controlling reaction temperature is 30 DEG C, and pressure is
0.5MPa.From the upper outlet of polymeric kettle.
The polymer solution of discharging is subjected to terminating reaction, cohesion, drying, obtains polymerizate EPDM-2.
Experimental result is shown in Table 3.
Comparative example 1
(1) according to the method for embodiment 1, the difference is that, the method that test case 2 is adsorbed according to contrast, obtain impurity content
For 20ppm refined 5- ethylidene -2- ENB reaction materials B.
(2) according to the method for embodiment 1, the difference is that, with " 10ml 5- ethylidene -2- ENB reaction materials B " is replaced
Generation " 10ml 5- ethylidene -2- ENB reaction materials A ".
Experimental result is shown in Table 3.
Comparative example 2
According to the method for embodiment 1, the difference is that, without step (1).
With " 10ml does not have the 5- ethylidene -2- ENBs of adsorbing contaminant " replacement " 10ml 5- ethylidene -2- norborneols
Alkene reaction material A ".
Experimental result is shown in Table 3.
Comparative example 3
(1) according to the method for embodiment 2, the difference is that, the method that test case 2 is adsorbed according to contrast, obtain impurity content
For 20ppm refined 5- ethylidene -2- ENB reaction materials B.
(2) according to the method for embodiment 2, the difference is that, with " 5- ethylidene -2- ENB reaction materials B " substitutes " 5- Asias
Ethyl -2- ENB reaction materials A ".
Experimental result is shown in Table 3.
Comparative example 4
According to the method for embodiment 2, the difference is that, without step (1).
With " without the 5- ethylidene -2- ENBs of adsorbing contaminant " replacement " 5- ethylidene -2- ENB reaction materials
A”。
Experimental result is shown in Table 3.
The system of ethylene-alpha-olefin provided by the invention-non-conjugated diene hydrocarbon copolymer is can be seen that from the data result of table 3
Preparation Method, the impurity content in the reaction material of the hydrocarbon containing non-conjugated diene can be reduced, improve the conversion ratio of non-conjugated diene hydrocarbon, carry
Catalytic efficiency in high ethene, alhpa olefin and non-conjugated diene hydrocarbon copolyreaction, reduce the gel content in polymer solution.
Embodiment 3
By polymerizate EPDM-1 and EPDM-2 that Examples 1 and 2 obtain vulcanized to obtain respectively vulcanizate ER-1 and
ER-2, sulfurizing formula are shown in Table 4.Conditions of vulcanization includes：160 DEG C, pressure 15MPa, cure time 10-30min of curing temperature.Vulcanization
Glue the performance test results are shown in Table 5.
Table 4
| Formula | Content (parts by weight) | Formula | Content (parts by weight) |
| EPDM-1 | 100 | EPDM-2 | 100 |
| Zinc oxide | 5 | Zinc oxide | 5 |
| Stearic acid | 1.0 | Stearic acid | 1.0 |
| Carbon black | 110 | Carbon black | 110 |
| Calcium carbonate | 55 | Calcium carbonate | 55 |
| Paraffin oil | 60 | Paraffin oil | 60 |
| Polyethylene glycol | 2 | Polyethylene glycol | 2 |
| Accelerant B Z | 1.8 | Accelerant B Z | 1.8 |
| Altax | 0.8 | Altax | 0.8 |
| Vulcanization accelerator TMTD | 1 | Vulcanization accelerator TMTD | 1 |
| Sulfur | 1.5 | Sulfur | 1.5 |
Table 5
| Performance | ER-1 | ER-2 |
| Mooney 1+4,125 DEG C | 80 | 82 |
| Tensile strength/MPa | 10.6 | 10.8 |
| 100% stretching strength/MPa | 4.9 | 5.1 |
| Elongation at break/% | 350 | 380 |
| Compression set/% | 16 | 13 |
| Hardness (Shao Er A) | 66 | 66 |
As can be seen from Table 5, using the copolymer prepared by the present invention, strength and extension property is good, and compression set is low, extrusion
Surface is smooth, is especially suitable for extrusion sealing article.
Claims (18)
1. a kind of preparation method of ethylene-alpha-olefin-non-conjugated diene hydrocarbon copolymer, this method include：
(1) non-conjugated diene hydrocarbon or dilution containing non-conjugated diene hydrocarbon are connect with nano silicon-alumina adsorbant
Touch, obtain the reaction material of the hydrocarbon containing non-conjugated diene, the impurity content in the reaction material is below 5ppm；
(2) in the presence of polymerization catalyst, hydrogen and solvent, the reaction material that step (1) obtains and ethene, alhpa olefin are gathered
Close reaction；
Wherein, on the basis of the gross weight of the nano silicon-alumina adsorbant, the nano silicon-oxidation
Aluminium adsorbent contains 5-15 weight % silica, 85-95 weight % aluminum oxide.
2. preparation method according to claim 1, wherein, the aperture of the nano silicon-alumina adsorbant is
2-8nm, the inner ratio surface area of the nano silicon-alumina adsorbant account for the nano silicon-alumina adsorption
The 75-90% of total specific surface area of agent.
3. preparation method according to claim 1 or 2, wherein, the nano silicon-alumina adsorbant by with
It is prepared by lower section method：(a) activated alumina is dried；(b) silicate, inorganic acid and surfactant are mixed to get nano-silica
SiClx solution, the pH value of the solution is 7-9；(c) in a heated condition, by the activated alumina that step (a) is dried and step (b)
The nanosilica solution mixing of preparation.
4. preparation method according to claim 3, wherein, the particle diameter of the activated alumina is 3-5mm, and specific surface area is
280-360m2/g；The silicate is selected from the silicate of alkali metal and/or alkaline-earth metal；The surfactant is with formula
R-O-(CH2CH2O)nThe AEO that-H is represented, wherein, R is C12-C18 saturation or undersaturated straight chain or band
The alkyl of side chain, n 5-20；The inorganic acid is selected from least one of hydrochloric acid, sulfuric acid and nitric acid.
5. preparation method according to claim 4, wherein, the silicate is sodium metasilicate.
6. preparation method according to claim 3, wherein, the temperature of step (c) heating is 100-140 DEG C.
7. preparation method according to claim 1, wherein, the temperature of step (1) described contact is 0-30 DEG C, the dilution
The concentration of non-conjugated diene hydrocarbon described in liquid is 20-80 volumes %.
8. preparation method according to claim 7, wherein, the temperature of step (1) described contact is 15-25 DEG C, described dilute
The concentration for releasing non-conjugated diene hydrocarbon described in liquid is 30-60 volumes %.
9. according to the preparation method described in claim 1,7 or 8, wherein, the mode of step (1) described contact is to make the dilution
For liquid by nano silicon-alumina adsorbant post, the volume space velocity of the dilution is 0.5-10h-1。
10. preparation method according to claim 9, wherein, the volume space velocity of step (1) described dilution is 1-5h-1。
11. according to the preparation method described in claim 1,7 or 8, wherein, the non-conjugated diene hydrocarbon drops for 5- methyl -2,5-
Bornylene, 5- methylene -2- ENBs, 5- ethylidene -2- ENBs, 1,4- hexadienes, 2- methyl isophthalic acids, 4- hexadienes,
At least one of 1,6- octadienes and dicyclopentadiene.
12. preparation method according to claim 11, wherein, the non-conjugated diene hydrocarbon is 5- ethylidene -2- norborneols
Alkene.
13. preparation method according to claim 1, wherein, the alhpa olefin is C3-C12 alhpa olefin.
14. preparation method according to claim 13, wherein, alhpa olefin is C3-C8 alhpa olefin.
15. preparation method according to claim 1, wherein, the polymerization catalyst contains vfanadium compound and organic calorize
Compound, the vfanadium compound are vanadium trichloride, vanadium tetrachloride, vanadium oxytrichloride, vanadium triacetylacetonate, diacetyl acetone vanadyl, three
At least one of ethyoxyl vanadyl and two chloroethoxy vanadyl；The organo-aluminum compound is a chlorine diethyl aluminum chloride, one
At least one in Chlorodimethyl aluminium, ethyl aluminum dichloride, a chloro-di-isobutyl aluminum, ethyl aluminium sesquichloride and methylaluminum sesquichloride
Kind；The mol ratio of the organo-aluminum compound counted using aluminium element and the vfanadium compound counted using v element is 2-300：1.
16. preparation method according to claim 15, wherein, the vfanadium compound is vanadium oxytrichloride；Organic calorize
Compound is at least one of aluminium diethyl monochloride, ethyl aluminum dichloride and ethyl aluminium sesquichloride；Have described in terms of aluminium element
The mol ratio of machine aluminium compound and the vfanadium compound counted using v element is 5-80：1.
17. preparation method according to claim 1, wherein, the condition of polymerisation includes described in step (2)：It is based on
The volume of the solvent, the content for the vfanadium compound counted using v element is 0.01-0.5mmol/L；Based on the solvent
Gross weight, the total concentration of non-conjugated diene hydrocarbon is 5-30 weight % in ethene, alhpa olefin and the reaction material；Alhpa olefin and ethene
Mol ratio is 1-5：1；The mol ratio of non-conjugated diene hydrocarbon and ethene is 0.015-0.05 in the reaction material：1；Based on ethene, α
The cumulative volume of non-conjugated diene hydrocarbon in alkene and the reaction material, the dosage of the hydrogen is 0.01-10 volumes %；Polymerisation
Temperature be -40 DEG C to 80 DEG C；The pressure of polymerisation is 0.1-5MPa.
18. preparation method according to claim 17, wherein, the condition of polymerisation includes described in step (2)：It is based on
The volume of the solvent, the content for the vfanadium compound counted using v element is 0.1-0.3mmol/L；Based on the total of the solvent
Weight, the total concentration of non-conjugated diene hydrocarbon is 8-10 weight % in ethene, alhpa olefin and the reaction material；Alhpa olefin and ethene rub
Your ratio is 2-4:1；Based on the cumulative volume of non-conjugated diene hydrocarbon in ethene, alhpa olefin and the reaction material, the dosage of the hydrogen is
0.02-5 volumes %；The temperature of polymerisation is 10-50 DEG C；The pressure of polymerisation is 0.1-2MPa.
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| CN102532383A (en) * | 2010-12-30 | 2012-07-04 | 中国石油化工股份有限公司 | Gel inhibiting method for ethylene-alphaolefin-non-conjugated diene terpolymer |
| CN104781292A (en) * | 2012-11-14 | 2015-07-15 | 株式会社Lg化学 | Ternary elastic copolymer, and method for preparing same |
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| CN1478862A (en) * | 2002-08-29 | 2004-03-03 | 中国石油化工股份有限公司 | Method of removing organic silicon compound from distillate oil |
| CN102532383A (en) * | 2010-12-30 | 2012-07-04 | 中国石油化工股份有限公司 | Gel inhibiting method for ethylene-alphaolefin-non-conjugated diene terpolymer |
| CN104781292A (en) * | 2012-11-14 | 2015-07-15 | 株式会社Lg化学 | Ternary elastic copolymer, and method for preparing same |
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