WO2023038351A1 - 올레핀계 중합체의 제조방법 및 이를 이용하여 제조된 올레핀계 중합체 - Google Patents
올레핀계 중합체의 제조방법 및 이를 이용하여 제조된 올레핀계 중합체 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/62—Refractory metals or compounds thereof
- C08F4/64—Titanium, zirconium, hafnium or compounds thereof
- C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
- C08F4/65916—Component covered by group C08F4/64 containing a transition metal-carbon bond supported on a carrier, e.g. silica, MgCl2, polymer
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2420/00—Metallocene catalysts
- C08F2420/03—Cp or analog not bridged to a non-Cp X ancillary neutral donor
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/62—Refractory metals or compounds thereof
- C08F4/64—Titanium, zirconium, hafnium or compounds thereof
- C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
- C08F4/65912—Component covered by group C08F4/64 containing a transition metal-carbon bond in combination with an organoaluminium compound
Definitions
- the present invention relates to a method for preparing an olefin-based polymer and an olefin-based polymer prepared using the same. Specifically, the present invention relates to a method for preparing an olefin-based polymer whose processability can be adjusted according to polymerization temperature and an olefin-based polymer prepared using the same.
- a ligand such as cyclopentadienyl, indenyl, or cycloheptadienyl is coordinated with a transition metal or transition metal halide compound.
- a bonded compound it has a sandwich structure in its basic form.
- metallocene catalysts In contrast to Ziegler-Natta catalysts, which are other catalysts used to polymerize olefins, the properties of active sites are not uniform because the metal components, which are active sites, are dispersed on an inert solid surface, metallocene catalysts have a constant structure. It is known as a single-site catalyst having the same polymerization properties at all active sites. A polymer polymerized with such a metallocene catalyst has a narrow molecular weight distribution, a uniform comonomer distribution, and higher copolymerization activity than a Ziegler-Natta catalyst.
- linear low-density polyethylene is prepared by copolymerizing ethylene and alpha-olefin at low pressure using a polymerization catalyst, and has a narrow molecular weight distribution and short chain branches (SCB) of a certain length. have, and generally do not have long chain branches (LCB).
- SCB short chain branches
- Films made of linear low-density polyethylene have high breaking strength, high elongation, tear strength, and impact strength along with the characteristics of general polyethylene, so they are superior to conventional low-density polyethylene or high-density polyethylene. It is widely used in stretch films, overlap films, etc., which are difficult to apply.
- linear low-density polyethylene produced by a metallocene catalyst has poor processability due to a narrow molecular weight distribution, and a film produced therefrom tends to have poor heat-sealing properties.
- An object of the present invention is to provide a method for preparing an olefin-based polymer whose processability can be adjusted depending on the polymerization temperature.
- Another object of the present invention is to provide an olefin-based polymer prepared using the above production method.
- At least one first transition metal compound represented by Formula 1 below At least one first transition metal compound represented by Formula 1 below; And polymerizing olefinic monomers at a polymerization temperature of 70 to 90 ° C. in the presence of a hybrid catalyst comprising a compound represented by Formula 2 below and at least one second transition metal compound selected from a compound represented by Formula 3 below
- a hybrid catalyst comprising a compound represented by Formula 2 below and at least one second transition metal compound selected from a compound represented by Formula 3 below
- a step of obtaining an olefin-based polymer wherein (1) the density of the olefin-based polymer is 0.915 to 0.935 g/cm 3 ; (2) a melt index (MI 2.16 ) measured at 190° C.
- MFR melt flow ratio
- MFR is the ratio of the melt index
- T is the polymerization temperature (°C)
- M 1 and M 2 are different from each other and are each independently titanium (Ti), zirconium (Zr) or hafnium (Hf),
- X is each independently halogen, C 1-20 alkyl, C 2-20 alkenyl, C 2-20 alkynyl, C 6-20 aryl, C 1-20 alkyl C 6-20 aryl, C 6-20 aryl C 1-20 alkyl, C 1-20 alkylamido, or C 6-20 arylamido;
- R 1 to R 10 are each independently hydrogen, substituted or unsubstituted C 1-20 alkyl, substituted or unsubstituted C 2-20 alkenyl, substituted or unsubstituted C 6-20 aryl, substituted or unsubstituted C 1 -20 alkyl C 6-20 aryl, substituted or unsubstituted C 6-20 aryl C 1-20 alkyl, substituted or unsubstituted C 1-20 heteroalkyl, substituted or unsubstituted C 3-20 heteroaryl, substituted Or unsubstituted C 1-20 alkylamido, substituted or unsubstituted C 6-20 arylamido, substituted or unsubstituted C 1-20 alkylidene, or substituted or unsubstituted C 1-20 silyl.
- R 1 to R 10 may each independently form a substituted or unsubstituted saturated or unsaturated C 4-20 ring by connecting adjacent groups.
- M 1 and M 2 are each different from each other and each is zirconium or hafnium
- X is each halogen or C 1-20 alkyl
- R 1 to R 10 may each be hydrogen, substituted or unsubstituted C 1-20 alkyl, substituted or unsubstituted C 2-20 alkenyl, or substituted or unsubstituted C 6-20 aryl.
- M 1 is hafnium
- M 2 is zirconium
- X may be chlorine or methyl
- the first transition metal compound is at least one of the transition metal compounds represented by Formulas 1-1 and 1-2 below
- the second transition metal compound is represented by Formulas 2-1, 2-2 and It may be at least one of the transition metal compounds represented by 3-1.
- Me is a methyl group.
- the molar ratio of the first transition metal compound to the second transition metal compound ranges from 100:1 to 1:100.
- the above catalyst may further include at least one cocatalyst compound selected from the group consisting of a compound represented by Formula 4, a compound represented by Formula 5, and a compound represented by Formula 6 below. there is.
- n is an integer of 2 or greater
- R a is a halogen atom, a C 1-20 hydrocarbon group, or a C 1-20 hydrocarbon group substituted with a halogen
- D is aluminum (Al) or boron (B), and R b , R c and R d are each independently a halogen atom, a C 1-20 hydrocarbon group, or a C 1-20 hydrocarbon group substituted with halogen. Or a C 1-20 alkoxy group,
- L is a neutral or cationic Lewis base
- [LH] + and [L] + are Bronsted acids
- Z is a Group 13 element
- A is each independently a substituted or unsubstituted C 6 It is a -20 aryl group or a substituted or unsubstituted C 1-20 alkyl group.
- the above catalyst may further include a carrier supporting the transition metal compound, the cocatalyst compound, or both.
- the carrier may include at least one selected from the group consisting of silica, alumina and magnesia.
- the total amount of the transition metal compound supported on the carrier is 0.001 to 1 mmole based on 1 g of the carrier, and the total amount of the cocatalyst compound supported on the carrier is 2 to 15 mmole based on 1 g of the carrier.
- the olefinic polymer is a copolymer of olefinic monomers and olefinic comonomers.
- the olefinic monomer is ethylene
- the olefinic comonomer is propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene, 1 - It may be at least one selected from the group consisting of undecene, 1-dodecene, 1-tetradecene and 1-hexadecene.
- the olefinic polymer is a linear low density polyethylene wherein the olefinic monomer is ethylene and the olefinic comonomer is 1-hexene.
- the polymerization of the olefin-based monomers may be carried out by gas-phase polymerization, and specifically, the polymerization of the olefin-based monomers may be carried out in a gas-phase fluidized bed reactor.
- a density of 0.915 ⁇ 0.935 g / cm 3 prepared by the above manufacturing method, (1) a density of 0.915 ⁇ 0.935 g / cm 3; and (2) an olefin-based polymer having a melt index (MI 2.16 ) of 0.5 to 1.5 g/10 min at 190° C. under a load of 2.16 kg.
- MI 2.16 melt index
- the olefinic polymer has (1) a density of 0.915 to 0.925 g/cm 3 ; and (2) a melt index of 0.8 to 1.2 g/10 min when measured at 190° C. with a load of 2.16 kg.
- the olefin-based polymer may have a drop impact strength (unit: g) satisfying Equation 2 below when a film prepared therefrom is measured according to ASTM D1709 based on a thickness of 50 ⁇ m.
- T is the polymerization temperature (°C).
- the processability of the olefin-based polymer can be adjusted according to the polymerization temperature.
- 1 is a graph showing the change in MFR according to polymerization temperature in a method for preparing an olefin-based polymer according to an embodiment of the present invention.
- FIG. 2 is a graph showing the change in drop impact strength according to the polymerization temperature in the method for preparing an olefin-based polymer according to an embodiment of the present invention.
- At least one first transition metal compound represented by Formula 1 below At least one first transition metal compound represented by Formula 1 below; And polymerizing olefinic monomers at a polymerization temperature of 70 to 90 ° C. in the presence of a hybrid catalyst comprising a compound represented by Formula 2 below and at least one second transition metal compound selected from a compound represented by Formula 3 below
- a hybrid catalyst comprising a compound represented by Formula 2 below and at least one second transition metal compound selected from a compound represented by Formula 3 below
- a step of obtaining an olefin-based polymer wherein (1) the density of the olefin-based polymer is 0.915 to 0.935 g/cm 3 ; (2) a melt index (MI 2.16 ) measured at 190° C.
- MFR melt flow ratio
- MFR is the ratio of the melt index
- T is the polymerization temperature (° C.).
- M 1 and M 2 are different from each other and are each independently titanium (Ti), zirconium (Zr) or hafnium (Hf).
- M 1 and M 2 may be zirconium or hafnium, respectively, while being different from each other.
- M 1 may be hafnium and M 2 may be zirconium.
- X is each independently halogen, C 1-20 alkyl, C 2-20 alkenyl, C 2-20 alkynyl, C 6-20 aryl, C 1-20 alkyl C 6-20 aryl, C 6-20 aryl C 1-20 alkyl, C 1-20 alkylamido, or C 6-20 arylamido.
- each X may be halogen or C 1-20 alkyl.
- X can be chlorine or methyl.
- R 1 to R 10 are each independently hydrogen, substituted or unsubstituted C 1-20 alkyl, substituted or unsubstituted C 2-20 alkenyl, substituted or unsubstituted C 6-20 aryl, substituted or unsubstituted C 1 -20 alkyl C 6-20 aryl, substituted or unsubstituted C 6-20 aryl C 1-20 alkyl, substituted or unsubstituted C 1-20 heteroalkyl, substituted or unsubstituted C 3-20 heteroaryl, substituted Or unsubstituted C 1-20 alkylamido, substituted or unsubstituted C 6-20 arylamido, substituted or unsubstituted C 1-20 alkylidene, or substituted or unsubstituted C 1-20 silyl.
- R 1 to R 10 may each independently form a substituted or unsubstituted saturated or unsaturated C 4-20 ring by connecting adjacent groups.
- R 1 to R 10 may each be hydrogen, substituted or unsubstituted C 1-20 alkyl, substituted or unsubstituted C 2-20 alkenyl, or substituted or unsubstituted C 6-20 aryl.
- M 1 and M 2 are each different from each other and each is zirconium or hafnium
- X is each halogen or C 1-20 alkyl
- R 1 to R 10 may each be hydrogen, substituted or unsubstituted C 1-20 alkyl, substituted or unsubstituted C 2-20 alkenyl, or substituted or unsubstituted C 6-20 aryl.
- M 1 is hafnium
- M 2 is zirconium
- X may be chlorine or methyl
- the first transition metal compound is at least one of the transition metal compounds represented by Formulas 1-1 and 1-2 below
- the second transition metal compound is represented by Formulas 2-1, 2-2 and It may be at least one of the transition metal compounds represented by 3-1.
- Me is a methyl group.
- the molar ratio of the first transition metal compound to the second transition metal compound ranges from 100:1 to 1:100.
- the molar ratio of the first transition metal compound to the second transition metal compound ranges from 50:1 to 1:50. More preferably, the molar ratio of the first transition metal compound to the second transition metal compound is in the range of 10:1 to 1:10.
- the above catalyst may further include at least one cocatalyst compound selected from the group consisting of a compound represented by Formula 4, a compound represented by Formula 5, and a compound represented by Formula 6 below. there is.
- n is an integer of 2 or greater
- R a may be a halogen atom, a C 1-20 hydrocarbon, or a C 1-20 hydrocarbon substituted with a halogen.
- R a can be methyl, ethyl, n -butyl or isobutyl.
- D is aluminum (Al) or boron (B), and R b , R c and R d are each independently a halogen atom, a C 1-20 hydrocarbon group, or a C 1-20 hydrocarbon group substituted with halogen. or a C 1-20 alkoxy group.
- R b , R c and R d may each independently be methyl or isobutyl
- D is boron (B)
- R b , R c and R d are Each may be pentafluorophenyl.
- L is a neutral or cationic Lewis base
- [LH] + and [L] + are Bronsted acids
- Z is a Group 13 element
- A is each independently a substituted or unsubstituted C 6 It is a -20 aryl group or a substituted or unsubstituted C 1-20 alkyl group.
- [LH] + may be a dimethylanilinium cation
- [Z(A) 4 ] - may be [B(C 6 F 5 ) 4 ] -
- [L] + may be [(C 6 H 5 ) 3 C] + .
- examples of the compound represented by Formula 4 include methyl aluminoxane, ethyl aluminoxane, isobutyl aluminoxane, and butyl aluminoxane, and methyl aluminoxane is preferable, but is not limited thereto.
- Examples of the compound represented by Formula 5 above include trimethylaluminum, triethylaluminium, triisobutylaluminum, tripropylaluminum, tributylaluminum, dimethylchloroaluminum, triisopropylaluminium, tri- s -butylaluminum, tricyclopentylaluminum , tripentyl aluminum, triisopentyl aluminum, trihexyl aluminum, trioctyl aluminum, ethyl dimethyl aluminum, methyl diethyl aluminum, triphenyl aluminum, tri- p -tolyl aluminum, dimethyl aluminum methoxide, dimethyl aluminum ethoxide, trimethyl boron, triethylboron, triisobutylboron, tripropylboron, tributylboron and the like, and trimethylaluminum, triethylaluminum and triisobutylaluminum are preferred, but not limited thereto.
- Examples of the compound represented by Formula 6 above include triethylammonium tetraphenylboron, tributylammonium tetraphenylboron, trimethylammonium tetraphenylboron, tripropylammonium tetraphenylboron, trimethylammonium tetra( p -tolyl) Boron, trimethylammonium tetra ( o , p -dimethylphenyl) boron, tributylammonium tetra ( p -trifluoromethylphenyl) boron, trimethylammonium tetra ( p -trifluoromethylphenyl) boron, tributylammonium tetra Pentafluorophenylboron, N,N-diethylaniliniumtetraphenylboron, N,N-diethylaniliniumtetrapentafluorophenylboron,
- the above catalyst may further include a carrier supporting the transition metal compound, the cocatalyst compound, or both.
- the carrier may support both the transition metal compound and the cocatalyst compound.
- the carrier may include a material containing a hydroxyl group on the surface, and preferably, a material having a highly reactive hydroxyl group and a siloxane group, from which moisture is removed from the surface by drying, may be used.
- the carrier may include at least one selected from the group consisting of silica, alumina, and magnesia.
- silica dried at high temperature, silica-alumina, silica-magnesia, and the like can be used as carriers, which are usually oxides such as Na 2 O, K 2 CO 3 , BaSO 4 , and Mg(NO 3 ) 2 . , carbonate, sulfate, and nitrate components.
- they may contain carbon, zeolites, magnesium chloride, and the like.
- the carrier is not limited thereto, and is not particularly limited as long as it can support the transition metal compound and the cocatalyst compound.
- the carrier may have an average particle size of 10 to 250 ⁇ m, preferably 10 to 150 ⁇ m, and more preferably 20 to 100 ⁇ m.
- the micropore volume of the carrier may be 0.1 to 10 cc/g, preferably 0.5 to 5 cc/g, and more preferably 1.0 to 3.0 cc/g.
- the specific surface area of the carrier may be 1 to 1,000 m2/g, preferably 100 to 800 m2/g, and more preferably 200 to 600 m2/g.
- the carrier may be silica.
- the silica may have a drying temperature of 200 to 900 ° C.
- the drying temperature may be preferably 300 to 800 °C, more preferably 400 to 700 °C.
- the drying temperature is less than 200° C., the moisture on the surface is too large, and the cocatalyst compound reacts with the moisture on the surface, and when the drying temperature exceeds 900° C., the structure of the carrier may collapse.
- the concentration of the hydroxy group in the dried silica may be 0.1 to 5 mmole/g, preferably 0.7 to 4 mmole/g, and more preferably 1.0 to 2 mmole/g. If the concentration of the hydroxy group is less than 0.1 mmole/g, the supported amount of the first cocatalyst compound is low, and if it exceeds 5 mmole/g, a problem of inactivation of the catalyst component may occur.
- the total amount of the transition metal compound supported on the carrier may be 0.001 to 1 mmole based on 1 g of the carrier.
- the ratio of the transition metal compound and the carrier satisfies the above range, it exhibits appropriate supported catalyst activity, which is advantageous in terms of maintaining the activity of the catalyst and economic efficiency.
- the total amount of the cocatalyst compound supported on the carrier may be 2 to 15 mmole based on 1 g of the carrier.
- One or two or more carriers may be used.
- both the transition metal compound and the cocatalyst compound may be supported on one carrier, or the transition metal compound and the cocatalyst compound may be supported on two or more carriers, respectively.
- only one of the transition metal compound and the cocatalyst compound may be supported on the carrier.
- a physical adsorption method or a chemical adsorption method may be used as a method of supporting the transition metal compound and/or cocatalyst compound that can be used in the catalyst for olefin polymerization.
- the physical adsorption method is a method of contacting a solution in which a transition metal compound is dissolved with a carrier and then drying it, a method of bringing a solution in which a transition metal compound and a cocatalyst compound are dissolved into contact with a carrier, and drying the solution, or a transition metal compound
- the dissolved solution is brought into contact with a carrier and dried to prepare a carrier supported with a transition metal compound, and separately, the solution in which the cocatalyst compound is dissolved is brought into contact with a carrier and then dried to prepare a carrier supported with a cocatalyst compound. After that, it may be a method of mixing them.
- the chemical adsorption method is a method in which a cocatalyst compound is first supported on the surface of a carrier and then a transition metal compound is supported on the cocatalyst compound, or a functional group on the surface of the carrier (for example, in the case of silica, a hydroxyl group on the silica surface (-OH) )) and a catalyst compound may be covalently bonded.
- the olefin-based polymer may be polymerized by, for example, polymerization reactions such as free radical, cationic, coordination, condensation, and addition. However, it is not limited to these.
- the olefin-based polymer may be prepared by gas phase polymerization, solution polymerization or slurry polymerization.
- the polymerization of the olefin-based monomers may be carried out by gas-phase polymerization, and specifically, the polymerization of the olefin-based monomers may be carried out in a gas-phase fluidized bed reactor.
- solvents that can be used include C 5-12 aliphatic hydrocarbon solvents such as pentane, hexane, heptane, nonane, decane and isomers thereof; aromatic hydrocarbon solvents such as toluene and benzene; hydrocarbon solvents substituted with chlorine atoms such as dichloromethane and chlorobenzene; and mixtures thereof, but are not limited thereto.
- a density of 0.915 ⁇ 0.935 g / cm 3 prepared by the above manufacturing method, (1) a density of 0.915 ⁇ 0.935 g / cm 3; and (2) an olefin-based polymer having a melt index (MI 2.16 ) of 0.5 to 1.5 g/10 min at 190° C. under a load of 2.16 kg.
- MI 2.16 melt index
- the olefinic polymer has a density of 0.915 to 0.935 g/cm 3 .
- the density of the olefin-based polymer may be 0.915 to 0.925 g/cm 3 .
- the olefin-based polymer has a melt index (MI 2.16 ) of 0.5 to 1.5 g/10 min measured at 190° C. under a load of 2.16 kg.
- the melt index of the olefin-based polymer measured under a load of 2.16 kg at 190° C. may be 0.8 to 1.2 g/10 min.
- the olefin-based polymer may be a homopolymer of olefin-based monomers or a copolymer of olefin-based monomers and comonomers.
- the olefinic polymer is a copolymer of olefinic monomers and olefinic comonomers.
- the olefinic monomer is C 2-20 alpha-olefin ( ⁇ -olefin), C 1-20 diolefin (diolefin), C 3-20 cycloolefin (cycloolefin) and C 3-20 cyclodiolefin (cyclodiolefin). It is at least one selected from the group consisting of.
- olefinic monomers include ethylene, propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene, 1-undecene, 1 It may be dodecene, 1-tetradecene or 1-hexadecene, etc., and the olefinic polymer may be a homopolymer containing only one olefinic monomer or a copolymer containing two or more of the olefinic monomers exemplified above.
- the olefin-based polymer may be a copolymer of ethylene and C 3-20 alpha-olefin.
- the olefinic polymer may be a linear low density polyethylene in which the olefinic monomer is ethylene and the olefinic comonomer is 1-hexene.
- the content of ethylene is preferably 55 to 99.9% by weight, more preferably 90 to 99.9% by weight.
- the content of the alpha-olefin comonomer is preferably 0.1 to 45% by weight, more preferably 0.1 to 10% by weight.
- the olefin-based polymer may have a drop impact strength (unit: g) satisfying Equation 2 below when a film prepared therefrom is measured according to ASTM D1709 based on a thickness of 50 ⁇ m.
- T is the polymerization temperature (°C).
- the processability and molecular weight distribution of the olefin-based polymer according to the embodiment of the present invention can be adjusted according to the polymerization temperature, it is understood that the drop impact strength of the film prepared therefrom can also be controlled according to the polymerization temperature.
- the olefin-based polymer film can be effectively used as a stretch film, overlap film, lamination, silage wrap, agricultural film, and the like.
- a method for forming a film from an olefin-based polymer according to an embodiment of the present invention is not particularly limited, and a forming method known in the art to which the present invention pertains may be used.
- an olefin-based polymer film may be prepared by processing the above-described olefin-based polymer by conventional methods such as blown film molding, extrusion molding, and casting molding. Among these, blown film molding is most preferable.
- transition metal compound of Formula 1-2 dimethylbis(n-propylcyclopentadienyl) hafnium dichloride
- transition metal compound of Formula 3-1 ((pentamethylcyclopentadienyl)(n-propylcyclopentadienyl) zirconium dichloride) were purchased from MCN and used without additional purification. did
- An ethylene/1-hexene copolymer was prepared in the presence of the supported catalyst obtained in Preparation Example 1 using a continuous gas phase fluidized bed reactor.
- the ethylene partial pressure in the reactor was maintained at about 15 kg/cm 2 , and the polymerization temperature was maintained as shown in Table 1 below.
- Example 1 Example 2 Example 3 Polymerization temperature (°C) 75 80 85 Catalyst Injection Amount (g/h) 2.3 2.1 2.1 Hydrogen Injection Amount (g/h) 2.22 2.13 2.19 1-Hexene Injection Amount (kg/h) 1.57 1.54 1.49 Hydrogen/ethylene concentration (%) ratio 0.048 0.049 0.047 1-hexene/ethylene concentration (%) ratio 1.31 1.39 1.30 Production per hour (kg/h) 6.20 6.22 7.10
- the melt index was measured at 190 ° C. under a load of 21.6 kg and a load of 2.16 kg, respectively, and the ratio (MI 21.6 / MI 2.16 ) was obtained.
- the drop impact strength of the prepared film was measured according to the ASTM D1709 (B) method in which a weight having a diameter of 38.10 ⁇ 0.13 mm was dropped from a height of 0.66 ⁇ 0.01 m after fixing a film having a thickness of 50 ⁇ m.
- the method for preparing an olefin-based polymer according to an embodiment of the present invention can adjust the processability of the olefin-based polymer prepared using the same according to the polymerization temperature.
- the drop impact strength of the finally obtained film can be adjusted according to the polymerization temperature.
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Abstract
Description
| 실시예 1 | 실시예 2 | 실시예 3 | |
| 중합온도(℃) | 75 | 80 | 85 |
| 촉매 주입량(g/h) | 2.3 | 2.1 | 2.1 |
| 수소 주입량(g/h) | 2.22 | 2.13 | 2.19 |
| 1-헥센 주입량(kg/h) | 1.57 | 1.54 | 1.49 |
| 수소/에틸렌 농도(%) 비 | 0.048 | 0.049 | 0.047 |
| 1-헥센/에틸렌 농도(%) 비 | 1.31 | 1.39 | 1.30 |
| 시간당 생산량(kg/h) | 6.20 | 6.22 | 7.10 |
| 단위 | 실시예 1 | 실시예 2 | 실시예 3 | 비교예 1 | 비교예 2 | 비교예 3 | |
| 밀도 | g/㎤ | 0.9181 | 0.9179 | 0.9182 | 0.9180 | 0.9183 | 0.9181 |
| MI2.16 | g/10분 | 1.01 | 1.03 | 0.98 | 1.01 | 1.00 | 1.03 |
| MI21.6 | g/10분 | 25.3 | 23.4 | 20.6 | 16.3 | 15.9 | 16.5 |
| MFR | - | 25.0 | 22.7 | 21.0 | 16.1 | 15.9 | 16.0 |
| 낙하충격강도 | g | 720 | 700 | 590 | 430 | 440 | 430 |
Claims (16)
- 아래 화학식 1로 표시되는 적어도 1종의 제1 전이금속 화합물; 및 아래 화학식 2로 표시되는 화합물과 아래 화학식 3으로 표시되는 화합물 중에서 선택되는 적어도 1종의 제2 전이금속 화합물을 포함하는 혼성 촉매의 존재하에 70~90℃의 중합온도에서 올레핀계 단량체를 중합하여 올레핀계 중합체를 얻는 단계를 포함하되, 올레핀계 중합체의 (1) 밀도가 0.915~0.935 g/㎤; (2) 190℃에서 2.16 kg 하중으로 측정되는 용융지수(MI2.16)가 0.5~1.5 g/10분이고; (3) 190℃에서 21.6 kg의 하중으로 측정되는 용융지수(MI21.6)와 2.16 kg 하중으로 측정되는 용융지수(MI2.16)의 비(melt flow ratio; MFR)가 아래 수학식 1을 만족하는 올레핀계 중합체의 제조방법:[수학식 1]-0.4T + 53.7 < MFR < -0.4T + 55.7[화학식 1][화학식 2][화학식 3]위 수학식에서 MFR은 용융지수의 비이고, T는 중합온도(℃)이며,위 화학식에서 M1과 M2는 서로 다르면서 각각 독립적으로 티타늄(Ti), 지르코늄(Zr) 또는 하프늄(Hf)이고,X는 각각 독립적으로 할로겐, C1-20 알킬, C2-20 알케닐, C2-20 알키닐, C6-20 아릴, C1-20 알킬 C6-20 아릴, C6-20 아릴 C1-20 알킬, C1-20 알킬아미도, 또는 C6-20 아릴아미도이고,R1 내지 R10은 각각 독립적으로 수소, 치환 또는 비치환된 C1-20 알킬, 치환 또는 비치환된 C2-20 알케닐, 치환 또는 비치환된 C6-20 아릴, 치환 또는 비치환된 C1-20 알킬 C6-20 아릴, 치환 또는 비치환된 C6-20 아릴 C1-20 알킬, 치환 또는 비치환된 C1-20 헤테로알킬, 치환 또는 비치환된 C3-20 헤테로아릴, 치환 또는 비치환된 C1-20 알킬아미도, 치환 또는 비치환된 C6-20 아릴아미도, 치환 또는 비치환된 C1-20 알킬리덴, 또는 치환 또는 비치환된 C1-20 실릴이되, R1 내지 R10은 각각 독립적으로 인접한 기가 연결되어 치환 또는 비치환된 포화 또는 불포화 C4-20 고리를 형성할 수 있다.
- 제1항에 있어서, M1과 M2는 서로 다르면서 각각 지르코늄 또는 하프늄이고, X는 각각 할로겐 또는 C1-20 알킬이고, R1 내지 R10은 각각 수소, 치환 또는 비치환된 C1-20 알킬, 치환 또는 비치환된 C2-20 알케닐, 또는 치환 또는 비치환된 C6-20 아릴인 올레핀계 중합체의 제조방법.
- 제2항에 있어서, M1이 하프늄이고, M2가 지르코늄이고, X가 염소 또는 메틸인 올레핀계 중합체의 제조방법.
- 제1항에 있어서, 제1 전이금속 화합물 대 제2 전이금속 화합물의 몰 비가 100:1~1:100의 범위인, 올레핀계 중합체의 제조방법.
- 제1항에 있어서, 촉매가 아래 화학식 4로 표현되는 화합물, 화학식 5로 표현되는 화합물 및 화학식 6으로 표현되는 화합물로 구성되는 군으로부터 선택되는 적어도 1종의 조촉매 화합물을 더 포함하는, 올레핀계 중합체의 제조방법:[화학식 4][화학식 5][화학식 6][L-H]+[Z(A)4]- 또는 [L]+[Z(A)4]-위 화학식 4에서, n은 2 이상의 정수이고, Ra는 할로겐 원자, C1-20 탄화수소기 또는 할로겐으로 치환된 C1-20 탄화수소기이고,위 화학식 5에서, D는 알루미늄(Al) 또는 보론(B)이고, Rb, Rc 및 Rd는 각각 독립적으로 할로겐 원자, C1-20 탄화수소기, 할로겐으로 치환된 C1-20 탄화수소기 또는 C1-20 알콕시기이며,위 화학식 6에서, L은 중성 또는 양이온성 루이스 염기이고, [L-H]+ 및 [L]+는 브뢴스테드 산이며, Z는 13족 원소이고, A는 각각 독립적으로 치환 또는 비치환된 C6-20 아릴기이거나 치환 또는 비치환된 C1-20 알킬기이다.
- 제6항에 있어서, 촉매가 전이금속 화합물, 조촉매 화합물 또는 둘 다를 담지하는 담체를 더 포함하는, 올레핀계 중합체의 제조방법.
- 제7항에 있어서, 담체가 실리카, 알루미나 및 마그네시아로 구성되는 군으로부터 선택되는 적어도 하나를 포함하는, 올레핀계 중합체의 제조방법.
- 제7항에 있어서, 담체에 담지되는 전이금속 화합물의 총량이 담체 1 g을 기준으로 0.001~1 mmole이고, 담체에 담지되는 조촉매 화합물의 총량이 담체 1 g을 기준으로 2~15 mmole인, 올레핀계 중합체의 제조방법.
- 제1항에 있어서, 올레핀계 중합체가 올레핀계 단량체와 올레핀계 공단량체의 공중합체인 올레핀계 중합체의 제조방법.
- 제10항에 있어서, 올레핀계 단량체가 에틸렌이고, 올레핀계 공단량체가 프로필렌, 1-부텐, 1-펜텐, 4-메틸-1-펜텐, 1-헥센, 1-헵텐, 1-옥텐, 1-데센, 1-운데센, 1-도데센, 1-테트라데센 및 1-헥사데센으로 구성되는 군으로부터 선택되는 하나 이상인 올레핀계 중합체의 제조방법.
- 제11항에 있어서, 올레핀계 중합체가 올레핀계 단량체가 에틸렌이고 올레핀계 공단량체가 1-헥센인 선형 저밀도 폴리에틸렌인 올레핀계 중합체의 제조방법.
- 제1항에 있어서, 올레핀계 단량체의 중합이 기상 중합으로 수행되는 올레핀계 중합체의 제조방법.
- 제1항 내지 제13항 중 어느 한 항의 올레핀계 중합체의 제조방법에 의해 제조되며, (1) 밀도가 0.915~0.935 g/㎤이고, (2) 190℃에서 2.16 kg 하중으로 측정되는 용융지수(MI2.16)가 0.5~1.5 g/10분인 올레핀계 중합체.
- 제14항에 있어서, (1) 0.915~0.925 g/㎤의 밀도; (2) 190℃에서 2.16 kg 하중으로 측정 시 0.8~1.2 g/10분의 용융지수를 가지는 올레핀계 중합체.
- 제14항에 있어서, 올레핀계 중합체로부터 제조되는 필름이 두께 50 ㎛ 기준으로 ASTM D1709에 따라 측정 시 낙하충격강도(단위: g)가 아래 수학식 2를 만족하는 올레핀계 중합체:[수학식 2]-1.8T2 + 275T - 9830 < 낙하충격강도 < -1.8T2 + 275T - 9730위 수학식에서 T는 중합온도(℃)이다.
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| JP2024514573A JP7745091B2 (ja) | 2021-09-07 | 2022-08-29 | オレフィン系重合体の製造方法およびこれを用いて製造されたオレフィン系重合体 |
| CN202280066967.2A CN118055956A (zh) | 2021-09-07 | 2022-08-29 | 用于制备基于烯烃的聚合物的方法和使用其制备的基于烯烃的聚合物 |
| EP22867620.1A EP4400521A4 (en) | 2021-09-07 | 2022-08-29 | PROCESS FOR PREPARING OLEFIN-BASED POLYMER AND OLEFIN-BASED POLYMER PREPARED USING SAME |
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| WO2022124692A1 (ko) * | 2020-12-08 | 2022-06-16 | 한화솔루션 주식회사 | 올레핀계 중합체 및 그 제조방법 |
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| CN118055956A (zh) | 2024-05-17 |
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