WO2022071735A1 - 폴리에틸렌 조성물 및 그의 제조 방법 - Google Patents
폴리에틸렌 조성물 및 그의 제조 방법 Download PDFInfo
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- WO2022071735A1 WO2022071735A1 PCT/KR2021/013291 KR2021013291W WO2022071735A1 WO 2022071735 A1 WO2022071735 A1 WO 2022071735A1 KR 2021013291 W KR2021013291 W KR 2021013291W WO 2022071735 A1 WO2022071735 A1 WO 2022071735A1
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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
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/02—Ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms
- C08L23/0815—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms with aliphatic 1-olefins containing one carbon-to-carbon double bond
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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
- C08F2420/01—Cp or analog bridged to a non-Cp X 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
- C08F2420/00—Metallocene catalysts
- C08F2420/07—Heteroatom-substituted Cp, i.e. Cp or analog where at least one of the substituent of the Cp or analog ring is or contains a heteroatom
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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
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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
Definitions
- the present invention relates to a polyethylene composition capable of producing a molded article capable of securing excellent environmental stress cracking resistance while improving the total volatile organic compound (TVOC) properties that can be generated by low molecular weight polymers and a method for producing the same it's about
- TVOC total volatile organic compound
- Polyethylene resins are increasingly in demand and are used in a variety of applications. With the demand for high-performance polyethylene for relatively new plastics, polymerization process technologies have been developed to support the production of new polymeric materials.
- olefin polymerization catalyst systems can be classified into Ziegler-Natta and metallocene catalyst systems, and these two high-activity catalyst systems have been developed according to their respective characteristics.
- Ziegler-Natta catalyst has been widely applied to existing commercial processes since its invention in the 1950s. There is a problem in that there is a limit to securing the desired physical properties because the composition distribution is not uniform.
- the metallocene catalyst is composed of a combination of a main catalyst containing a transition metal compound as a main component and a cocatalyst containing an organometallic compound containing aluminum as a main component.
- a catalyst is a homogeneous complex catalyst and is a single site catalyst.
- the molecular weight distribution is narrow according to the single active point characteristic, and a polymer with a uniform composition distribution of the comonomer is obtained. It has properties that can change crystallinity, etc.
- U.S. Patent No. 5,914,289 discloses a method for controlling the molecular weight and molecular weight distribution of a polymer using a metallocene catalyst supported on each carrier, but the amount of solvent used in preparing the supported catalyst and preparation time are long, and , the inconvenience of having to support each of the metallocene catalysts to be used on a carrier followed.
- Korean Patent Application No. 2003-12308 discloses a method of controlling molecular weight distribution by supporting a double-nuclear metallocene catalyst and a single-nuclear metallocene catalyst together with an activator on a carrier to change the combination of catalysts in the reactor and polymerization.
- this method has a limitation in simultaneously realizing the characteristics of each catalyst, and also has a disadvantage in that the metallocene catalyst portion is released from the carrier component of the finished catalyst, thereby causing fouling in the reactor.
- a low molecular weight lubricant is included in the final molded product (bottle cap or blow molding container, etc.) to change the taste of the beverage and, in severe cases, cause a bad odor.
- TVOC total volatile organic compounds due to low molecular weight are induced in the injection processing process (200 o C) for manufacturing the final molded product, harmful gases such as harmful fumes may be generated.
- the caps for example, bottle caps
- the caps of airtight containers containing carbonated beverages must be strong enough to withstand the pressure of carbonated drinks and have good sealing properties. It must be flexible enough to provide Specifically, rigidity capable of withstanding the internal pressure caused by carbonated beverages in an airtight container, impact resistance at low temperatures, and environmental stress cracking resistance are required.
- polyethylene products that are currently widely sold and used have a problem in that low molecular substances contained in the resin composition are transferred to food when used at high temperatures. It has a problem of being easily damaged by impact.
- the total volatile organic compounds (TVOC) that can be generated by polymers in the low molecular weight region while solving the problem of deterioration in sealing performance due to deterioration of physical properties during long-term storage, etc. ) and there is a continuous need to develop a polyethylene composition that can reduce the generation of harmful gases such as fumes.
- the present invention relates to a polyethylene composition capable of producing a molded article capable of securing excellent environmental stress cracking resistance and improving the total volatile organic compound (TVOC) properties that can be generated by low molecular weight polymers, and a method for preparing the same would like to provide
- TVOC total volatile organic compound
- the present invention is to provide an injection-molded article comprising the above-described polyethylene composition.
- a polyethylene composition having a linear structure fraction ratio (R OL ) of 10% or less and a molecular weight distribution (Mw/Mn) of 12 or less according to Formula 1 below:
- R OL (A 1 /A 2 ) ⁇ 100
- R OL represents the proportion (%) of the linear structure fraction contained in the polyethylene composition
- a 1 is the ratio (A 1 , %) of the integral value of the region where the log MW value is less than 3 in the GPC curve graph where the x-axis is log MW and the y-axis is dw/dlogMw among the total integral values on the x-axis,
- a 2 is the ratio (A 2 , %) of the integral value of the region where the log MW value is 3 or more to less than 3.5 in the GPC curve graph where the x-axis is log MW and the y-axis is dw/dlogMw will be.
- the present invention provides a method for preparing the polyethylene composition.
- the present invention provides an injection molded article comprising the polyethylene composition.
- a polyethylene composition capable of reducing the generation of harmful gases such as total volatile organic compounds (TVOC) and fumes, which may be generated by low molecular weight polymers, and a method for preparing the same.
- TVOC total volatile organic compounds
- fumes which may be generated by low molecular weight polymers
- Example 1 is a schematic diagram exemplarily showing an apparatus and a process for preparing a polyethylene composition of Example 1 according to an embodiment of the present invention.
- part by weight means a relative concept in which the weight of the other material is expressed as a ratio based on the weight of a certain material. For example, in a mixture in which the weight of material A is 50 g, the weight of material B is 20 g, and the weight of material C is 30 g, based on 100 parts by weight of material A, the amounts of material B and material C are each 40 parts by weight and 60 parts by weight.
- % by weight means an absolute concept in which the weight of a certain material is expressed as a percentage of the total weight.
- the content of material A, material B, and material C in 100% of the total weight of the mixture is 50% by weight, 20% by weight, and 30% by weight, respectively. At this time, the sum of the contents of each component does not exceed 100% by weight.
- a molded article capable of securing excellent environmental stress cracking resistance can be manufactured, and harmful substances such as total volatile organic compounds (TVOC) and fumes that can be generated by low molecular weight polymers
- TVOC total volatile organic compounds
- a polyethylene composition capable of reducing gas evolution is provided.
- the polyethylene composition of the present invention has a linear structure fraction ratio (R OL ) according to the following formula 1 is 10% or less, and a molecular weight distribution (Mw/Mn) is 12 or less.
- R OL linear structure fraction ratio
- Mw/Mn molecular weight distribution
- R OL (A 1 /A 2 ) ⁇ 100
- R OL represents the proportion (%) of the linear structure fraction contained in the polyethylene composition
- a 1 is the ratio (A 1 , %) of the integral value of the region where the log MW value is less than 3 in the GPC curve graph where the x-axis is log MW and the y-axis is dw/dlogMw among the total integral values on the x-axis,
- a 2 is the ratio (A 2 , %) of the integral value of the region where the log MW value is 3 or more to less than 3.5 in the GPC curve graph where the x-axis is log MW and the y-axis is dw/dlogMw will be.
- the difference between the region where the log MW value is 3 or more and less than 3.5 and the region where the log MW value is less than 3 is characterized by a large difference.
- VOC volatile organic compounds
- the linear structure fraction ratio (R OL ) according to Formula 1 is 10% or less, or 3.0% to 10.0%, or 9.9% or less, or 4% to 9.9%, or 9.8% or less, or 5% to 9.8%, or 9.6% or less, or 7% to 9.6%, or 9.5% or less, or 7.5% to 9.5%.
- the ratio (A 1 ) of the integral value of the region where the log MW value is less than 3 among the total integral values on the x-axis is 0.5% or less or 0.01% to 0.5%, or 0.45% or less, or 0.03% to 0.45%, or 0.43% or less, or 0.02% to 0.43%, or 0.4% or less, or 0.05% to 0.4%.
- the ratio (A 2 ) of the integral value of the region in which the log MW value is 3 or more to less than 3.5 among the total integral values of the x-axis is 3.5% to 4.5%, alternatively 3.6% to 4.4%, alternatively 3.7% to 4.4%, alternatively 3.8% to 4.3%.
- the difference (A 2 -A 1 ) between the ratio (A 2 ) of the integral value of the region of greater than or equal to 3.5 to the total integral value of the x-axis is 3.0% to 4.0%, or 3.2% to 4.0%, or 3.3% to 3.9 %, or from 3.5% to 3.9%.
- the ratio (A 3 ) of the integral value of the region where the log MW value is 5.5 or more among the total integral values of the x-axis is 11.5% or more or 11.5% to 18%, or 11.8% or more or 11.8% to 17%, or 12% or more or 12% to 16%, or 12.3% or more or 12.3% to 15%, or 12.5% or more or 12.5% to 14% .
- the polyethylene composition has a GPC curve as described above in terms of minimizing the amount of volatile organic compounds (VOC) generated while securing excellent environmental stress cracking resistance when manufacturing injection molded articles such as food and drug storage containers or caps by optimizing the molecular structure. It has a graph area ratio. In particular, when the ratio between specific regions is minimized while reducing the low molecular region in the GPC curve graph, uniform physical properties and excellent processability can be secured, and the characteristic of reducing VOC can be secured.
- VOC volatile organic compounds
- the polyethylene composition of the present invention is prepared by using a catalyst including a specific metallocene compound as described below, so that the chain propagation and chain transfer rate are almost constant, so that the molecular weight distribution is narrow. have a characteristic
- the polyethylene composition may have a molecular weight distribution (Mw/Mn) of 12 or less, or 8.0 to 12.0, or 11.9 or less, or 8.5 to 11.9, or 11.8 or less, or 9 to 11.8, or 11.5 or less, or 10 to 11.5.
- Mw/Mn molecular weight distribution
- the polyethylene composition can effectively reduce TVOC due to a low molecular weight in an injection processing process for manufacturing a molded article through a narrow molecular weight distribution as described above.
- the polyethylene composition may have a weight average molecular weight of 125000 g/mol to 250000 g/mol, or 130000 g/mol to 180000 g/mol, or 135000 g/mol to 150000 g/mol.
- the weight average molecular weight (Mw) and the number average molecular weight (Mn) are converted values with respect to standard polystyrene measured using gel permeation chromatography (GPC, manufactured by Water Corporation).
- GPC gel permeation chromatography
- the weight average molecular weight is not limited thereto and may be measured by other methods known in the art to which the present invention pertains.
- the polyethylene composition is a high-density polyethylene composition having a density (ASTM D 1505, 23° C.) of 0.945 g/cm 3 to 0.965 g/cm 3 .
- the density is preferably 0.950 g/cm 3 to 0.963 g/cm 3 , or 0.952 g/cm 3 to 0.962 g/cm 3 , or 0.953 g/cm 3 to 0.960 g/cm 3 , or 0.953 g/cm 3 to 0.958 g/cm 3 , or 0.954 g/cm 3 to 0.958 g/cm 3 .
- the polyethylene composition has a melt index (ASTM D 1238, 190 °C, 2.16kg) of 0.01 g/10min to 0.45 g/10min, or 0.05 g/10min to 0.4 g/10min, or 0.1 g/10min to 0.38 g /10 min, or 0.2 g/10 min to 0.36 g/10 min, or 0.25 g/10 min to 0.35 g/10 min.
- a melt index ASTM D 1238, 190 °C, 2.16kg
- the composition may have a melt flow rate (MFRR, Melt flow rate ratio, MI 5 / MI 2.16 ) of 4.2 or more, or 4.2 to 5, or 4.22 or more, or 4.22 to 4.8, or 4.24 or more, or 4.24 to 4.5.
- MFRR Melt flow rate ratio
- the polyethylene composition may have a melting point (Tm) of 128 °C to 135 °C, or 128.5 °C to 134 °C, or 129 °C to 132 °C.
- Tm melting point
- the melting point (Tm) of the polyethylene composition may be measured using a Differential Scanning Calorimeter (DSC).
- DSC Differential Scanning Calorimeter
- the melting temperature of the polymer is measured using a DSC 2920 (TA instrument). After heating the polyethylene composition to 200 °C and holding for 5 minutes, the temperature is lowered to 30 °C and then the temperature is increased again, and the top of the DSC curve is measured as Tm. At this time, the rate of rise and fall of the temperature is 10 °C/min, respectively, and Tm is measured in the section where the second temperature rises.
- Tm is measured in the section where the second temperature rises.
- the polyethylene composition of the present invention comprises an ethylene homopolymer and an ethylene copolymer of a C 4-12 alpha-olefin monomer, preferably, 99:1 to 99.5 of the ethylene homopolymer and the ethylene copolymer. : Included in a weight ratio of 0.5.
- the alpha-olefin is 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexa It is at least one selected from the group consisting of decene, 1-octadecene, and 1-eicosene, and may preferably be 1-butene.
- the polyester resin composition according to the present invention optimizes the molecular structure with a narrow molecular weight distribution to reduce low molecular weight regions in the GPC curve graph and minimize the ratio between specific regions, thereby providing excellent environmental stress cracking resistance during injection molded product processing. By securing it, the generation of harmful gases such as total volatile organic compounds (TVOC) and fumes can be significantly reduced.
- TVOC total volatile organic compounds
- the content of total volatile organic compounds (TVOC) measured at 200° C. for 10 minutes using a gas chromatography-mass spectrometer is 100 ug/ g or less or 0.01 to 100 ug/g, or 90 ug/g or less, or 0.1 to 90 ug/g, or 85 ug/g or less, or 0.2 to 85 ug/g, or 82 ug/g or less, or 0.2 to 82 ug/g g, or 75 ug/g or less, or 0.2 to 75 ug/g.
- the content of such total volatile organic compounds (TVOC) may be measured by applying various methods known as mass spectrometry methods for gaseous elements, and for detailed measurement methods, refer to Test Example 1 to be described later.
- a molded article capable of securing excellent environmental stress cracking resistance can be manufactured, and total volatile organic compounds (TVOC) and fumes that can be generated by low molecular weight polymers ) is provided a method for effectively preparing a polyethylene composition capable of reducing the generation of harmful gases such as.
- TVOC total volatile organic compounds
- fumes that can be generated by low molecular weight polymers
- the polyethylene composition according to the present invention includes at least one first metallocene compound represented by the following Chemical Formula 1; And it can be prepared by polymerization of ethylene in the presence of at least one second metallocene compound represented by the following formula (2).
- M 1 is a Group 4 transition metal
- Cp 1 and Cp 2 are the same as or different from each other, and each independently any one selected from the group consisting of cyclopentadienyl, indenyl, 4,5,6,7-tetrahydro-1-indenyl, and fluorenyl radicals one, and these may be substituted with hydrocarbons having 1 to 20 carbon atoms;
- R a and R b are the same as or different from each other and are each independently hydrogen, C 1-20 alkyl, C 1-10 alkoxy, C 2-20 alkoxyalkyl, C 6-20 aryl, C 6-10 aryloxy, C 2-20 alkenyl, C 7-40 alkylaryl, C 7-40 arylalkyl, C 8-40 arylalkenyl, or C 2-10 alkynyl;
- each Z 1 is independently a halogen atom, C 1-20 alkyl, C 2-10 alkenyl, C 7-40 alkylaryl, C 7-40 arylalkyl, C 6-20 aryl, substituted or unsubstituted C 1- 20 alkylidene, substituted or unsubstituted amino, C 2-20 alkylalkoxy, or C 7-40 arylalkoxy;
- n 1 or 0;
- B is boron
- M is a group 4 transition metal
- R 1 to R 4 are each independently hydrogen, C 1-20 alkyl, C 3-20 cycloalkyl, or C 6-20 aryl, or at least one pair of R 1 and R 2 or R 3 and R 4 is each independently combine with each other to form a substituted or unsubstituted C 6-60 aromatic ring,
- R 5 and R 6 are each independently C 1-20 alkyl, C 3-20 cycloalkyl, or C 6-20 aryl, or R 5 and R 6 are bonded to each other to form a C 3-60 aliphatic ring, or C 6 -60 to form an aromatic ring,
- X 1 and X 2 are each independently C 1-20 alkyl or —O(CO)R′, where R′ is C 1-20 alkyl,
- Q is a substituted or unsubstituted C 2-60 heterocyclic ring including any one or more selected from the group consisting of N, O and S,
- Y and Y' are elements constituting Q
- Y is N, O, or S
- Y' is an element of Q adjacent to Y, and is N or C.
- a hydrocarbyl group is a monovalent functional group in which a hydrogen atom is removed from hydrocarbon, and is an alkyl group, an alkenyl group, an alkynyl group, an aryl group, an aralkyl group, an aralkenyl group, an aralkynyl group, an alkylaryl group, an alkenyl group It may include an aryl group and an alkynylaryl group.
- the hydrocarbyl group having 1 to 30 carbon atoms may be a hydrocarbyl group having 1 to 20 carbon atoms or 1 to 10 carbon atoms.
- the hydrocarbyl group may be a straight chain, branched chain or cyclic alkyl group.
- the hydrocarbyl group having 1 to 30 carbon atoms is a methyl group, an ethyl group, an n-propyl group, an iso-propyl group, an n-butyl group, an iso-butyl group, a tert-butyl group, an n-pentyl group, and a n-hexyl group.
- straight-chain, branched-chain or cyclic alkyl groups such as a sil group, n-heptyl group, and cyclohexyl group; or an aryl group such as phenyl, biphenyl, naphthyl, anthracenyl, phenanthrenyl, or fluorenyl.
- it may be an alkylaryl such as methylphenyl, ethylphenyl, methylbiphenyl, or methylnaphthyl, and may be an arylalkyl such as phenylmethyl, phenylethyl, biphenylmethyl, or naphthylmethyl.
- it may be an alkenyl such as allyl, allyl, ethenyl, propenyl, butenyl, pentenyl.
- the hydrocarbyloxy group is a functional group in which a hydrocarbyl group is bonded to oxygen.
- the hydrocarbyloxy group having 1 to 30 carbon atoms may be a hydrocarbyloxy group having 1 to 20 carbon atoms or 1 to 10 carbon atoms.
- the hydrocarbyloxy group may be a straight chain, branched chain or cyclic alkyl.
- the hydrocarbyloxy group having 1 to 30 carbon atoms is a methoxy group, ethoxy group, n-propoxy group, iso-propoxy group, n-butoxy group, iso-butoxy group, tert-butoxy group, n-pentoxy group , a straight-chain, branched-chain or cyclic alkoxy group such as n-hexoxy group, n-heptoxy group, cyclohexoxy group; Alternatively, it may be an aryloxy group such as a phenoxy group or a naphthalenoxy group.
- a hydrocarbyloxyhydrocarbyl group is a functional group in which one or more hydrogens of a hydrocarbyl group are substituted with one or more hydrocarbyloxy groups.
- the hydrocarbyloxyhydrocarbyl group having 2 to 30 carbon atoms may be a hydrocarbyloxyhydrocarbyl group having 2 to 20 carbon atoms or 2 to 15 carbon atoms.
- the hydrocarbyloxyhydrocarbyl group may be a straight chain, branched chain or cyclic alkyl group.
- the hydrocarbyloxyhydrocarbyl group having 2 to 30 carbon atoms is a methoxymethyl group, a methoxyethyl group, an ethoxymethyl group, an iso-propoxymethyl group, an iso-propoxyethyl group, an iso-propoxyhexyl group, a tert- part alkoxyalkyl groups such as a oxymethyl group, a tert-butoxyethyl group, and a tert-butoxyhexyl group; or an aryloxyalkyl group such as a phenoxyhexyl group.
- the hydrocarbyl(oxy)silyl group is a functional group in which 1 to 3 hydrogens of -SiH 3 are substituted with 1 to 3 hydrocarbyl groups or hydrocarbyloxy groups.
- the hydrocarbyl (oxy)silyl group having 1 to 30 carbon atoms may be a hydrocarbyl (oxy)silyl group having 1 to 20 carbon atoms, 1 to 15 carbon atoms, 1 to 10 carbon atoms, or 1 to 5 carbon atoms.
- the hydrocarbyl (oxy)silyl group having 1 to 30 carbon atoms is an alkyl group such as a methylsilyl group, a dimethylsilyl group, a trimethylsilyl group, a dimethylethylsilyl group, a diethylmethylsilyl group or a dimethylpropylsilyl group.
- Alkoxysilyl groups such as a methoxysilyl group, a dimethoxysilyl group, a trimethoxysilyl group, or a dimethoxyethoxysilyl group; It may be an alkoxyalkylsilyl group such as a methoxydimethylsilyl group, a diethoxymethylsilyl group, or a dimethoxypropylsilyl group.
- the silylhydrocarbyl group having 1 to 20 carbon atoms is a functional group in which at least one hydrogen of the hydrocarbyl group is substituted with a silyl group.
- the silyl group may be -SiH 3 or a hydrocarbyl (oxy)silyl group.
- the silylhydrocarbyl group having 1 to 20 carbon atoms may be a silylhydrocarbyl group having 1 to 15 carbon atoms or 1 to 10 carbon atoms.
- the silylhydrocarbyl group having 1 to 20 carbon atoms is a silylalkyl group such as -CH 2 -SiH 3 ; an alkylsilylalkyl group such as a methylsilylmethyl group, a methylsilylethyl group, a dimethylsilylmethyl group, a trimethylsilylmethyl group, a dimethylethylsilylmethyl group, a diethylmethylsilylmethyl group, or a dimethylpropylsilylmethyl group; Or it may be an alkoxysilylalkyl group, such as a dimethylethoxysilylpropyl group.
- the halogen may be fluorine (F), chlorine (Cl), bromine (Br) or iodine (I).
- the sulfonate group has a structure of -O-SO 2 -R c , and R c may be a hydrocarbyl group having 1 to 30 carbon atoms.
- R c may be a hydrocarbyl group having 1 to 30 carbon atoms.
- the sulfonate group having 1 to 30 carbon atoms may be a methanesulfonate group or a phenylsulfonate group.
- a sulfone group having 1 to 30 carbon atoms has a structure of -R c' -SO 2 -R c" , wherein R c' and R c" are the same as or different from each other, and each independently any one of a hydrocarbyl group having 1 to 30 carbon atoms can Specifically, the sulfone group having 1 to 30 carbon atoms may be a methylsulfonylmethyl group, a methylsulfonylpropyl group, a methylsulfonylbutyl group, or a phenylsulfonylpropyl group.
- that two substituents adjacent to each other are connected to each other to form an aliphatic or aromatic ring means that the atom(s) of the two substituents and the valence (atoms) to which the two substituents are bonded are connected to each other to form a ring do.
- R e and R f of -NR e R f or -NR e' R f' are linked to each other or R e' and R f' are linked to each other to form an aliphatic ring is piperidinyl (piperidinyl).
- R e and R f of -NR e R f or -NR e' R f' are linked to each other, or R e' and R f' are linked to each other to form an aromatic ring.
- a pyrrolyl group and the like can be exemplified.
- the alkyl may be a straight chain or branched chain alkyl.
- the C 1-20 alkyl is C 1-20 straight-chain alkyl; C 1-10 straight chain alkyl; C 1-5 straight chain alkyl; C 3-20 branched chain alkyl; C 3-15 branched chain alkyl; or C 3-10 branched chain alkyl. More specifically, C 1-20 alkyl is a methyl group, ethyl group, n-propyl group, iso-propyl group, n-butyl group, iso-butyl group, tert-butyl group, n-pentyl group, or iso-pentyl group, etc. but is not limited thereto. Meanwhile, in the present specification, "iPr" refers to an iso-propyl group.
- the cycloalkyl may be a cyclic alkyl.
- the C 3-20 cycloalkyl is C 3-20 cyclic alkyl; C 3-15 cyclic alkyl; or C 3-10 cyclic alkyl. More specifically, cyclopropyl, cyclobutyl, cyclopentyl, 3-methylcyclopentyl, 2,3-dimethylcyclopentyl, cyclohexyl, 3-methylcyclohexyl, 4-methylcyclohexyl, 2,3-dimethylcyclohexyl, 3,4,5-trimethylcyclohexyl, 4-tert-butylcyclohexyl, cycloheptyl, cyclooctyl, and the like, but are not limited thereto.
- "Cy” means cycloalkyl having 3 to 6 carbon atoms.
- the alkenyl may be straight-chain, branched-chain or cyclic alkenyl.
- the C 2-20 alkenyl is C 2-20 straight chain alkenyl, C 2-10 straight chain alkenyl, C 2-5 straight chain alkenyl, C 3-20 branched chain alkenyl, C 3-15 branched chain alkenyl, C 3-10 branched chain alkenyl, C 5-20 cyclic alkenyl or C 5-10 cyclic alkenyl. More specifically, C 2-20 alkenyl may be ethenyl, propenyl, butenyl, pentenyl or cyclohexenyl, and the like.
- the alkoxy may be a straight-chain, branched-chain or cyclic alkoxy group.
- the C 1-20 alkoxy is a C 1-20 straight-chain alkoxy group; C 1-10 straight chain alkoxy; C 1-5 straight chain alkoxy group; C 3-20 branched or cyclic alkoxy; C 3-15 branched or cyclic alkoxy; or C 3-10 branched or cyclic alkoxy.
- C 1-20 alkoxy is a methoxy group, ethoxy group, n-propoxy group, iso-propoxy group, n-butoxy group, iso-butoxy group, tert-butoxy group, n-pentoxy group, iso- a pentoxy group, a neo-pentoxy group, or a cyclohexoxy group, but is not limited thereto.
- the alkoxyalkyl may have a structure including -R g -OR h and may be a substituent in which one or more hydrogens of alkyl (-R g ) are substituted with alkoxy (-OR h ).
- the C 2-20 alkoxyalkyl is a methoxymethyl group, a methoxyethyl group, an ethoxymethyl group, an iso-propoxymethyl group, an iso-propoxyethyl group, an iso-propoxyhexyl group, a tert-butoxymethyl group, tert- butoxyethyl group or tert-butoxyhexyl group, but is not limited thereto.
- the aryl includes monocyclic, bicyclic or tricyclic aromatic hydrocarbons.
- the aryl group may have 6 to 60 carbon atoms or 6 to 40 carbon atoms, or 6 to 20 carbon atoms, or 6 to 15 carbon atoms, specifically phenyl, biphenyl, naphthyl, anthracenyl, phenanthrenyl, fluorenyl, and the like, but is not limited thereto.
- the aryloxy is a functional group in which the above-described aryl group is bonded to oxygen.
- the aryloxy may have 6 to 60 carbon atoms, 6 to 40 carbon atoms, 6 to 20 carbon atoms, or 6 to 15 carbon atoms, more specifically phenoxy, biphenoxyl, naphthoxy, etc., The present invention is not limited thereto.
- the alkylaryl may mean a substituent in which one or more hydrogens of the aforementioned aryl group are substituted with the aforementioned alkyl.
- the C 7-20 alkylaryl may include, but is not limited to, methylphenyl, ethylphenyl, methylbiphenyl, and methylnaphthyl.
- the arylalkyl may mean a substituent in which one or more hydrogens of the aforementioned alkyl are substituted by the aforementioned aryl.
- the C 7-20 arylalkyl may include, but is not limited to, phenylmethyl, phenylethyl, biphenylmethyl, and naphthylmethyl.
- C 6-20 arylene or arylidene is the same as the above-described aryl except that it is a divalent substituent, and specifically, phenylene, biphenylene, naphthylene, anthracenylene, phenanthrenylene, flu orenylene, and the like, but is not limited thereto.
- the heteroaryl is a heteroaryl containing at least one of O, N, and S as a heterogeneous element, and the number of carbon atoms is not particularly limited, but may have 2 to 60 carbon atoms or 2 to 20 carbon atoms.
- heteroaryl include xanthene, thioxanthen, thiophene, furan, pyrrole, imidazole, thiazole, oxazole, oxadiazole, triazole, pyridyl, bipyridyl, Pyridinyl group, pyrimidyl group, triazine group, acridyl group, pyridazine group, pyrazinyl group, quinolinyl group, quinazoline group, quinoxalinyl group, phthalazinyl group, pyrido pyrimidinyl group, pyridopyrazinyl group group, pyrazino pyrazinyl group, isoquino
- heterocycle includes both an aliphatic ring including any one or more selected from the group consisting of N, O and S, and an aromatic ring including any one or more selected from the group consisting of N, O and S do.
- the Group 4 transition metal may be titanium (Ti), zirconium (Zr), hafnium (Hf), or rutherpodium (Rf), specifically, titanium (Ti), zirconium (Zr), or hafnium (Hf) may be, and more specifically, may be zirconium (Zr) or hafnium (Hf), but is not limited thereto.
- the group 13 element may be boron (B), aluminum (Al), gallium (Ga), indium (In), or thallium (Tl), specifically, boron (B), or aluminum (Al). and is not limited thereto.
- substituents are optionally a hydroxyl group within the range of exhibiting the same or similar effect as the desired effect; halogen; alkyl or alkenyl, aryl, alkoxy; alkyl or alkenyl, aryl, alkoxy containing one or more heteroatoms among the heteroatoms of Groups 14 to 16; amino; silyl; alkylsilyl or alkoxysilyl; phosphine group; phosphide group; sulfonate group; And it may be substituted with one or more substituents selected from the group consisting of a sulfone group.
- a metallocene catalyst for performing ethylene polymerization of the present invention comprising at least one first metallocene compound represented by Formula 1 and at least one second metallocene compound represented by Formula 2 as a catalyst precursor that can be used
- M 1 may be zirconium (Zr) or hafnium (Hf), preferably zirconium (Zr).
- Cp 1 and Cp 2 may each be cyclopentadienyl, indenyl, or fluorenyl.
- R a and R b may each be hydrogen, C 1-6 alkyl, C 7-12 arylalkyl, C 2-12 alkoxyalkyl, C 6-12 aryl, or C 2-6 alkenyl, preferably hydrogen, methyl, ethyl, propyl, isopropyl, n-butyl, tert-butyl, pentyl, hexyl, butenyl, phenyl, phenyl substituted methyl, phenyl substituted butyl, or tert-butoxyhexyl.
- each Z 1 may be a halogen atom, preferably chlorine (Cl).
- n may be 1.
- the compound represented by Formula 1 may be, for example, a compound represented by one of the following structural formulas, but is not limited thereto.
- the first metallocene compound represented by Formula 1 may be synthesized by applying known reactions, and more detailed synthesis methods may refer to Examples.
- the polyethylene composition according to the present invention in the presence of a catalyst comprising at least one second metallocene compound represented by the following formula (2) together with one or more first metallocene compounds described above as a catalyst precursor, ethylene It can be prepared by polymerization.
- the metallocene compound represented by Formula 2 employs a bridge structure including a boron anion, unlike the conventionally used CGC (constrained geometry catalyst) type precursor.
- CGC-type precursors have a neutral bridge structure including silicon, so that the ligand unit is negatively charged. Due to this, there is a problem in that it is difficult to express various physical properties when preparing an olefin polymer due to a structural limitation.
- the metallocene compound represented by Formula 2 according to the present invention may have a neutral ligand unit because the bridge structure is negatively charged.
- the ligand unit of the present invention is a heterocyclic Q of Formula 2, wherein Y, which is an element of Q, is coordinated with a metal, and an element Y' of Q adjacent to Y is connected to a bridge. Accordingly, in the present invention, by employing various neutral ligand units satisfying the above structure, a catalyst having higher activity and higher copolymerizability than a conventional CGC precursor can be prepared.
- alkyl or carboxylate is included as a metal substituent of the metallocene compound represented by Formula 2, which acts as a good leaving group to promote reaction with a cocatalyst such as MAO, thereby increasing activity.
- M may be zirconium (Zr).
- R 1 to R 4 are each independently hydrogen, C 1-10 alkyl, or C 6-20 aryl, or R 1 to R 4 are at least one pair bonded to each other to be substituted or unsubstituted It may form a cyclic C 6-20 aromatic ring.
- R 1 and R 2 or R 3 and R 4 may each independently combine with each other to form a substituted or unsubstituted C 6-20 aromatic ring, or R 1 and R 2 may combine with each other to form a substituted or An unsubstituted C 6-20 aromatic ring may be formed, and R 3 and R 4 may be combined with each other to form a substituted or unsubstituted C 6-20 aromatic ring.
- R 1 to R 4 are each independently hydrogen, or methyl, or at least one pair of R 1 and R 2 or R 3 and R 4 is each independently bonded to each other to form a benzene ring, or 1,2, 3,4-tetrahydronaphthalene ring, wherein said benzene ring, or 1,2,3,4-tetrahydronaphthalene ring, is unsubstituted or from the group consisting of methyl, tertbutyl and 4-tertbutyl phenyl It may be substituted with 1 to 4 substituents selected from.
- R 5 and R 6 are each independently C 1-10 alkyl, or C 6-20 aryl, or R 5 and R 6 are bonded to each other to form a C 3-20 aliphatic ring, or C 6 -20 can form aromatic rings.
- R 5 and R 6 are each independently methyl or phenyl, or R 5 and R 6 may be bonded to each other to form a cyclooctane ring.
- R 5 and R 6 may each be phenyl.
- X 1 and X 2 may each independently be methyl or acetate.
- R' may be methyl
- X 1 and X 2 may be the same as each other.
- Q may be a substituted or unsubstituted C 2-20 heterocyclic ring including at least one selected from the group consisting of N, O and S.
- Q may be a pyridine ring, a quinoline ring, a 4,5-dihydrooxazole ring, a pyrazole ring, or a benzoxazole ring, wherein Q is unsubstituted or methyl, isopropyl and diphenylamino It may be substituted with 1 to 4 substituents selected from the group consisting of.
- Q may be a pyridine ring, a 4,5-dihydrooxazole ring, a pyrazole ring, or a benzoxazole ring, wherein Q is unsubstituted or consisting of methyl, isopropyl and diphenylamino It may be substituted with 1 to 4 substituents selected from the group.
- Y is a hetero atom coordinated with the metal M, preferably, Y may be N.
- the second metallocene compound represented by Formula 2 may be synthesized by applying known reactions, and more detailed synthesis methods may refer to Examples.
- the molar ratio of the first metallocene compound and the second metallocene compound is 1:2 to 1:5, or 1:2 to 1:4; or 1:2 to 1:3, or 1:2 to 1:2.5.
- the molar ratio of the catalyst precursor may be the same as described above in terms of optimizing the molecular structure according to the deviation of the molecular weight of the precursor.
- the metallocene catalyst includes at least one first metallocene compound represented by Formula 1 and at least one second metallocene compound represented by Formula 2 hybrid supported. It is a catalyst.
- a supported metallocene catalyst is used, the morphology and physical properties of the polyethylene produced are excellent, and it can be suitably used in the conventional slurry polymerization, bulk polymerization, or gas phase polymerization process.
- a carrier having a hydroxyl group, a silanol group, or a siloxane group having a high reactivity on the surface may be used.
- silica prepared by calcining silica gel, silica dried at high temperature, silica-alumina, and silica-magnesia may be used, and these are typically Na 2 O, K 2 CO 3 , BaSO 4 , and Mg(NO 3 ). 2 and the like oxide, carbonate, sulfate, and nitrate components.
- the temperature for calcining or drying the carrier may be from about 200 °C to about 600 °C, or from about 250 °C to about 600 °C.
- the calcination or drying temperature for the carrier is low, there is a risk that the surface moisture and the cocatalyst may react because there is too much moisture remaining in the carrier, and the cocatalyst loading rate is relatively low due to the excess hydroxyl groups. It can be increased, but this requires a large amount of co-catalyst.
- the drying or calcination temperature is too high, the surface area decreases as the pores on the surface of the carrier coalesce, a lot of hydroxyl groups or silanol groups disappear on the surface, and only siloxane groups remain, so there is a risk of reducing the reaction site with the promoter. there is.
- the amount of hydroxyl groups on the surface of the carrier is preferably 0.1 mmol/g to 10 mmol/g, more preferably 0.5 mmol/g to 5 mmol/g.
- the amount of hydroxyl groups on the surface of the carrier can be controlled by the method and conditions or drying conditions of the carrier, such as temperature, time, vacuum or spray drying, and the like.
- the amount of the hydroxyl group is less than 0.1 mmol/g, there are few reaction sites with the co-catalyst, and if it exceeds 10 mmol/g, it is not preferable because it may be caused by moisture other than the hydroxyl group present on the surface of the carrier particle. not.
- the amount of hydroxyl groups on the surface of the carrier may be 0.1 mmol/g to 10 mmol/g or 0.5 mmol/g to 5 mmol/g.
- the amount of hydroxyl groups on the surface of the carrier can be controlled by the method and conditions or drying conditions of the carrier, such as temperature, time, vacuum or spray drying, and the like. If the amount of the hydroxyl group is too low, there are few reaction sites with the promoter, and if it is too large, it may be due to moisture other than the hydroxyl group present on the surface of the carrier particle.
- silica especially silica prepared by calcining silica gel
- the catalyst released from the surface of the carrier in the propylene polymerization process is almost non-existent.
- polyethylene is produced by slurry or gas phase polymerization, it is possible to minimize fouling of the reactor wall or polymer particles agglomerated with each other.
- the total amount of the first metallocene compound of Formula 1 and the second metallocene compound of Formula 2 is, for example, about 10 ⁇ mol or more based on the weight of the carrier, based on about 1 g of silica, Or it may be supported in a content range of about 30 ⁇ mol or more, about 100 ⁇ mol or less, or about 80 ⁇ mol or less. When supported in the above content range, it may exhibit an appropriate supported catalyst activity, which may be advantageous in terms of maintaining the activity of the catalyst and economic feasibility.
- the catalyst composition may further include one or more cocatalysts together with the above-described metallocene compound and the carrier.
- the cocatalyst may be any cocatalyst used for polymerization of olefins under a general metallocene catalyst. This co-catalyst causes a bond to be formed between the hydroxyl group and the Group 13 transition metal on the carrier. In addition, since the cocatalyst exists only on the surface of the carrier, it can contribute to securing the unique characteristics of the specific hybrid catalyst composition of the present application without a fouling phenomenon in which the polymer particles are agglomerated with the reactor wall or each other.
- the catalyst composition according to the present invention may include one or more cocatalyst compounds selected from the group consisting of compounds represented by the following Chemical Formulas 3 to 5 in addition to the metallocene compound.
- each R 31 is independently halogen; or C 1-20 hydrocarbyl substituted or unsubstituted with halogen;
- n is an integer greater than or equal to 2
- D is aluminum or boron
- each R 41 is independently halogen; Or halogen-substituted or unsubstituted C 1-20 hydrocarbyl,
- L is a neutral or cationic Lewis base
- [LH] + is a Bronsted acid
- E is a group 13 element
- A is each independently substituted or unsubstituted C 6-20 aryl or substituted or unsubstituted C 1-20 alkyl, wherein said C 6-40 aryl or C 1-20 alkyl is unsubstituted or halogen, C 1 substituted with one or more substituents selected from the group consisting of -20 alkyl, C 1-20 alkoxy, and C 6-20 aryloxy.
- the compound represented by Formula 3 may serve as an alkylating agent and an activator
- the compound represented by Formula 4 may serve as an alkylating agent
- the compound represented by Formula 5 may serve as an activator there is.
- the compound represented by Formula 3 is not particularly limited as long as it is an alkylaluminoxane, but may be, for example, methylaluminoxane, ethylaluminoxane, isobutylaluminoxane, butylaluminoxane, etc., preferably methylaluminoxane .
- the compound represented by Formula 4 is not particularly limited as long as it is an alkyl metal compound, but for example, trimethylaluminum, triethylaluminum, triisobutylaluminum, tripropylaluminum, tributylaluminum, dimethylchloroaluminum, triisopropylaluminum, Tri-s-butylaluminum, tricyclopentylaluminum, tripentylaluminum, triisopentylaluminum, trihexylaluminum, trioctylaluminum, ethyldimethylaluminum, methyldiethylaluminum, triphenylaluminum, tri-p-tolylaluminum, dimethyl aluminum methoxide, dimethyl aluminum ethoxide, trimethyl boron, triethyl boron, triisobutyl boron, tripropyl boron, tributyl boron, etc., preferably selected from
- Examples of the compound represented by Formula 5 include triethylammonium tetraphenylboron, tributylammonium tetraphenylboron, trimethylammonium tetraphenylboron, tripropylammonium tetraphenylboron, and trimethylammonium tetra(p-tolyl).
- the total amount of the cocatalyst, the first metallocene compound of Formula 1, and the second metallocene compound of Formula 2 is, respectively, in a molar ratio of about 1:1 to about 1:10000 (crude) catalyst: the sum of the first and second metallocene compounds), preferably in a molar ratio of about 1:1 to about 1:1000, more preferably about 1:10 to about It may be included in a molar ratio of 1:100.
- the molar ratio is less than about 1, the metal content of the cocatalyst is too small, so the catalytically active species is not well made, and the activity may be lowered. there is.
- the supported amount of the cocatalyst may be from about 3 mmol to about 25 mmol, or from about 5 mmol to about 20 mmol based on 1 g of the carrier.
- the catalyst composition the step of supporting a cocatalyst on a carrier; supporting the metallocene compound on the support on which the promoter is supported; and a carrier on which the promoter and the metallocene compound are supported.
- the supporting conditions are not particularly limited and may be performed within a range well known to those skilled in the art.
- the loading temperature is possible in the range of about -30 o C to about 150 o C, preferably about 50 o C to about 98 o C, or from about 55 o C to about 95 o C.
- the loading time may be appropriately adjusted according to the amount of the first metallocene compound to be supported.
- the supported catalyst reacted may be used as it is by removing the reaction solvent by filtration or distillation under reduced pressure, and if necessary, it may be used after Soxhlet filter with an aromatic hydrocarbon such as toluene.
- the preparation of the supported catalyst may be carried out in the presence of a solvent or non-solvent.
- the usable solvent includes an aliphatic hydrocarbon solvent having 5 to 12 carbon atoms such as hexane or pentane, an aromatic hydrocarbon solvent such as toluene or benzene, a hydrocarbon solvent substituted with a chlorine atom such as dichloromethane, diethyl ether or Most organic solvents such as ether-based solvents such as tetrahydrofuran (THF) and acetone and ethyl acetate are mentioned, and hexane, heptane, toluene, or dichloromethane is preferable.
- the solvent used here is preferably used by treating a small amount of alkyl aluminum to remove a small amount of water or air that acts as a catalyst poison, and it is also possible to further use a cocatalyst.
- the polyethylene composition according to the present invention is prepared by polymerizing ethylene while introducing hydrogen gas in the presence of the above-described metallocene catalyst.
- the hydrogen gas may be in a content of 35 ppm to 250 ppm, or 80 ppm to 200 ppm, or 100 ppm to 190 ppm, or 150 ppm to 180 ppm, based on the weight of ethylene.
- the hydrogen gas content chain propagation and chain transfer rate are maintained almost constant, and the content of the low molecular region with a narrow molecular weight distribution can be minimized and VOC can be lowered.
- the method for preparing such a polyethylene composition may be carried out by a method of slurry polymerization by applying a conventional apparatus and contacting technique using ethylene or ethylene and alpha-olefin as raw materials in the presence of the catalyst composition described above.
- the method for preparing the polyethylene may copolymerize ethylene and alpha-olefin using a continuous slurry polymerization reactor, a loop slurry reactor, or the like, but is not limited thereto.
- the polymerization temperature may be from about 25 o C to about 500 o C, preferably from about 25 o C to about 200 o C, more preferably from about 50 o C to about 150 o C.
- the polymerization pressure is about 1 kgf/cm 2 to about 100 kgf/cm 2 , preferably about 1 kgf/cm 2 to about 50 kgf/cm 2 , more preferably about 5 kgf/cm 2 to about 30 kgf It can be /cm 2 .
- the catalyst composition including the above-described first metallocene compound and the second metallocene compound may exhibit high catalytic activity.
- the catalyst activity during ethylene polymerization is about 15 kg PE /g ⁇ cat when calculated as the ratio of the weight (kg PE) of polyethylene produced per mass (g) of the catalyst composition used based on the unit time (hr) hr or more or from about 15 kg PE /g.cat.hr to about 80 kg PE /g.cat.hr.
- the activity of the catalyst composition is about 20 kg PE /g ⁇ cat ⁇ hr or more, or about 22 kg PE /g ⁇ cat ⁇ hr or more, or about 23 kg PE /g ⁇ cat ⁇ hr or more, or about 60 kg PE /g ⁇ cat ⁇ hr or more.
- the polyethylene composition prepared by the method of the above-described embodiment may exhibit excellent injection processability while exhibiting improved mechanical and physical properties and chemical properties due to various properties due to the molecular structure optimization characteristic along with a narrow molecular weight distribution. .
- the polyethylene composition can reduce the occurrence of TVOC and fume that can be generated by the low molecular weight polymer.
- an injection-molded article comprising the polyethylene composition of the embodiment described above.
- an injection-molded article such as a container lid having excellent physical and chemical properties can be manufactured.
- such an injection-molded article may exhibit excellent physical and chemical properties along with excellent injection processability at a low injection pressure.
- the injection-molded article is prepared as an injection-molded article in the form of a bottle cap by the injection and continuous compression molding (CCM) method of the polyethylene composition prepared by the method of the embodiment already described above, excellent environmental stress resistance It can exhibit crack resistance (ESCR) properties.
- CCM injection and continuous compression molding
- the injection molded article may have an environmental stress cracking resistance (ESCR) measured according to ASTM D 1693 of 50 hours or more, or 55 hours or more, or 58 hours or more, or 60 hours or more, or 62 hours or more.
- ESCR environmental stress cracking resistance
- ASTM D 1693 environmental stress cracking resistance
- the ESCR characteristics of the injection-molded article are measured by applying a pressure to 5 bar after exposure to a 5 wt% solution of IGEPAL under a temperature condition of 42 ° C according to ASTM D 1693 to measure the time (F50hr) for crack generation to 50% (F50hr). can be evaluated
- F50hr time for crack generation to 50%
- the environmental stress cracking resistance (ESCR) of the injection-molded article manufactured using the polyethylene composition according to an embodiment of the present invention has very good environmental resistance, it minimizes the change in physical properties due to long-term storage and greatly improves the reliability of the product can do it
- polyester resin composition according to the present invention in particular, by optimizing the molecular structure with a narrow molecular weight distribution reduces the low molecular weight region in the GPC curve graph and minimizes the ratio between specific regions, so that the total volatile organic compounds (TVOC ) and the generation of harmful gases such as fumes can be significantly reduced.
- TVOC total volatile organic compounds
- the injection-molded article may be, for example, a food and drug storage container or a stopper, for example, a lightweight container cap (bottle cap), and in addition to various injection-molded articles.
- the injection-molded article of another embodiment described above can be manufactured according to a general injection method except that the polyethylene composition prepared by the method of the embodiment is applied and a relatively low injection pressure is applied. . An additional description thereof will be omitted.
- t-butyl-O-(CH 2 ) 6 -Cl was prepared by the method described in the literature (Tetrahedron Lett. 2951 (1988)), and cyclopentatidenyl sodium (NaCp) was prepared therein.
- NaCp cyclopentatidenyl sodium
- t-butyl-O-(CH 2 ) 6 -C 5 H 5 was obtained (yield 60%, bp 80 o C/0.1 mmHg).
- t-butyl-O-(CH 2 ) 6 -C 5 H 5 was dissolved in tetrahydrofuran (THF) at -78 o C, n-butyllithium (n-BuLi) was slowly added thereto, and the temperature was raised to room temperature. Then, the reaction was carried out for 8 hours. The solution was again slowly added to a suspension solution of ZrCl 4 (THF) 2 (170 g, 4.50 mmol)/THF (30 mL) at -78 o C, and the resulting lithium salt solution was further reacted at room temperature for 6 hours. made it All volatiles were removed by vacuum drying, and hexane was added to the obtained oily liquid material and filtered.
- THF tetrahydrofuran
- a 1-benzothiophene solution was prepared by dissolving 4.0 g (30 mmol) of 1-benzothiophene in THF. Then, 14 mL (36 mmol, 2.5 M in hexane) of an n-BuLi solution and 1.3 g (15 mmol) of CuCN were added to the 1-benzothiophene solution.
- a solution was prepared by dissolving the alcohol intermediate in toluene. Then, 190 mg (1.0 mmol) of p-toluenesulfonic acid was added to the solution, and the mixture was refluxed for about 10 minutes. The obtained reaction mixture was separated by column chromatography to give an orange-brown color, and 1.8 g (9.0 mmol, 98) of 1,2-dimethyl-3H-benzo [b] cyclopenta [d] thiophene (ligand A) in liquid form. % yield) was obtained.
- solution B prepared by injecting 1-(6-(tert-butoxy)hexyl)-N-(tert-butyl)-1-chloro-1-methylsilaneamine (ligand B) and toluene into a 250 mL schlenk flask was cooled to -78 °C.
- Solution A prepared above was slowly injected into the cooled solution B. And the mixture of solutions A and B was stirred at room temperature overnight.
- H-NMR spectra were obtained using a sample dissolved in a small amount of pyridine-D5 and CDCl 3 .
- the polyethylene composition of Example 1 was prepared by performing a continuous slurry polymerization process using a continuous slurry reactor under the conditions shown in Table 1 using the supported catalyst prepared in Preparation Example 1 above.
- a continuous slurry reactor including a first polymerization reactor (R1) and a second polymerization reactor (R2), and a post-treatment reactor (Post-R, post-reactor) (Continuous Slurry Reactor)
- a polyethylene composition was prepared using the apparatus.
- TEAL triethylaluminum
- ASA antistatic agent
- Example 2 The polyethylene composition of Example 2 was prepared in the same manner as in Example 1, except that a continuous slurry polymerization process was performed under the conditions as shown in Table 1 below with different amounts of hydrogen input and 1-butene input.
- HDPE high-density polyethylene
- HDPE high-density polyethylene
- INEOS CAP602 manufactured by Ineos, INEOS CAP602
- Z/N Ziegler-Natta
- HDPE high-density polyethylene
- HDPE high-density polyethylene
- LG Chem LG BE0400
- Z/N Ziegler-Natta
- HDPE high-density polyethylene
- Example 6 Prepared in the same manner as in Example 1, except that the supported catalyst prepared in Comparative Preparation Example 1 was used instead of the supported catalyst of Preparation Example 1, and hydrogen input amount and 1-butene input amount under the conditions shown in Table 1 below A polyethylene composition of Comparative Example 6 was prepared by performing a continuous slurry polymerization process by changing the .
- a polyethylene composition of Comparative Example 7 was prepared in the same manner as in Comparative Example 6, except that a continuous slurry polymerization process was performed under the conditions as shown in Table 1 below with different amounts of hydrogen input and 1-butene input.
- Example 1 Preparation Example 1 10 1.5 3.5 23.5
- Example 2 Preparation Example 1 10 1.8 1.8 24.9 Comparative Example 1 CAP508 - - - - Comparative Example 2 CAP602 - - - - Comparative Example 3 MB5568 - - - - Comparative Example 4 BE0400 - - - - Comparative Example 5 SM100 - - - - Comparative Example 6 Comparative Preparation Example 1 10 3.2 4.5 20.0 Comparative Example 7 Comparative Preparation Example 1 10 2.8 4.0 21.2
- the catalyst activity (Activity, kg PE/g ⁇ cat ⁇ h) was calculated as the ratio of the weight (kg PE) of the polyethylene composition produced per mass (g) of the supported catalyst used based on the unit time (h). .
- the melt index (MI 2.16 , MI 5 ) was measured under the conditions of a load of 2.16 kg and 5 kg at a temperature of 190 o C by the method of ASTM D 1238, and it was expressed as the weight (g) of the polymer melted for 10 minutes. .
- the melt flow rate (MFRR, Melt flow rate ratio, MI 5 /MI 2.16 ) is the ratio of the MI 5 melt rate (MI, 5 kg load) divided by MI 2.16 (MI, 2.16 kg load).
- the density (g/cm 3 ) of the polyethylene composition was measured by the method of ASTM D 1505.
- the melting temperature of the polymer was measured using a DSC 2920 (TA instrument).
- the polyethylene composition was heated to 200 °C and maintained for 5 minutes, the temperature was lowered to 30 °C, and then the temperature was increased again, and the peak of the DSC curve was measured as Tm.
- the rate of rise and fall of the temperature was 10 °C/min, respectively, and Tm was measured in the second temperature rise section.
- the weight average molecular weight (Mw) and number average molecular weight (Mn) of polyethylene are measured using gel permeation chromatography (GPC, gel permeation chromatography, manufactured by Water), and molecular weight distribution (PDI) by dividing the weight average molecular weight by the number average molecular weight ) was calculated.
- GPC gel permeation chromatography
- PDI molecular weight distribution
- a gel permeation chromatography (GPC) apparatus a Waters PL-GPC220 instrument was used, and a Polymer Laboratories PLgel MIX-B 300 mm long column was used. At this time, the measurement temperature was 160 o C, 1,2,4-trichlorobenzene (1,2,4-Trichlorobenzene) was used as a solvent, and the flow rate was 1 mL/min.
- Polyethylene samples according to Examples and Comparative Examples each contained 0.0125% of dibutylhydroxytoluene (BHT, 2,6-bis(1,1-dimethylethyl)-4-methylphenol) using a GPC analysis device (PL-GP220).
- BHT dibutylhydroxytoluene
- the values of Mw and Mn were derived using a calibration curve formed using a polystyrene standard specimen.
- the weight average molecular weight of the polystyrene standard specimen is 2000 g/mol, 10000 g/mol, 30000 g/mol, 70000 g/mol, 200000 g/mol, 700000 g/mol, 2000000 g/mol, 400000 g/mol, 1000000 g
- Nine species of /mol were used.
- the linear structure fraction ratio (R OL ) was calculated from the log graph for the weight average molecular weight (Mw) of polyethylene measured using gel permeation chromatography (GPC, gel permeation chromatography, manufactured by Water). did
- a log graph of the weight average molecular weight (Mw) of polyethylene measured using a GPC apparatus in the same manner as described above that is, a GPC curve in which the x-axis is log MW and the y-axis is dw/dlogMw
- the integral value of the region where the Log MW value is less than 3 logMW ⁇ 3, A 1
- the Log MW value is 5.5
- the ratio (%) of the integral value (5 ⁇ logMW, A 3 ) of the region greater than or equal to the total integral value was calculated.
- R OL (A 1 /A 2 ) ⁇ 100
- R OL represents the proportion (%) of the linear structure fraction contained in the polyethylene composition
- a 1 is the ratio (A 1 , %) of the integral value of the region where the log MW value is less than 3 in the GPC curve graph where the x-axis is log MW and the y-axis is dw/dlogMw among the total integral values on the x-axis,
- a 2 is the ratio (A 2 , %) of the integral value of the region where the log MW value is 3 or more to less than 3.5 in the GPC curve graph where the x-axis is log MW and the y-axis is dw/dlogMw will be.
- IPPS-IM ESCR measuring equipment
- Cap was immersed in Igepal 5% solution, and Cap ESCR was measured under a temperature of 42 °C and a pressure of 5 bar.
- a volatile organic compound (VOC, ug/g) analysis was performed at 200 ° C. in the following manner for the polyethylene compositions according to Examples and Comparative Examples, and the measured value for the polyethylene composition of Example 1 was 100%, and the remaining The TVOC relative values (%) for the polyethylene compositions of Example 2 and Comparative Examples 1 to 7 are shown in Table 2 below.
- volatile organic compound (VOC) analysis was performed under the following conditions using a gas chromatography-mass spectrometer (JTD-GC/MS-02).
- VOC compound VOC value (ug/g) of individual substances generated from the measurement sample.
- a compound chromatogram area of individual material peaks in the measurement sample.
- Cstd mass of toluene injected using toluene standard solution (about 1.7 ug/g).
- Wsample weight (g) of the sample to be measured.
- the TVOC value measured in the same manner as described above for the polyethylene composition of Example 1 was 80.5 ug/g, and the TVOC value for the polyethylene composition of Examples 2 and Comparative Examples 1 to 7 was set to 100%.
- the relative values (%) are shown in Table 2 below.
- Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 MI 2.16 (g/10min) 0.35 0.29 1.8 0.8 0.8 0.27 1.05 0.49 0.42 MI 5 (g/10min) 1.48 1.24 5.94 2.72 2.92 1.12 4.11 1.99 1.72 MFRR (MI 5 /MI 2.16 ) 4.24 4.27 3.3 3.4 3.65 4.15 3.91 4.07 4.09 density (g/cm 3 ) 0.954 0.955 0.953 0.953 0.956 0.959 0.951 0.952 0.952 Tm (°C) 130.3 129.3 129.7 129.9 130.4 132.9 128.4 128.1 128.8 Mw (x1000 g/mol) 138 150 105 130 133 184 112 121 125 PDI (Mw/Mn) 10.8 11.5 17.4 16.5 22.9 13.8 11.3 12.6 12.8 A 1 (%) 0.3 0.4 2.8 2.0 3.0 0.7
- the polyethylene composition of Examples according to the present invention has a narrow molecular weight distribution and minimizes the linear structure fraction ratio through adjustment of molecular structure, so that when manufacturing injection molded articles such as food and drug storage containers or stoppers, excellent resistance It can be seen that the generation of harmful gases such as total volatile organic compounds (TVOC) and fumes that can be generated by polymers in the low molecular weight region can be reduced while securing environmental stress cracking resistance (Cap ESCR). .
- TVOC total volatile organic compounds
- Cap ESCR environmental stress cracking resistance
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Abstract
Description
| 촉매 또는 제품명 | 에틸렌 (kg/hr) |
수소 (g/hr) |
1-부텐 (mL/min) |
활성 (kg PE/gㆍcatㆍh) |
|
| 실시예 1 | 제조예 1 | 10 | 1.5 | 3.5 | 23.5 |
| 실시예 2 | 제조예 1 | 10 | 1.8 | 1.8 | 24.9 |
| 비교예 1 | CAP508 | - | - | - | - |
| 비교예 2 | CAP602 | - | - | - | - |
| 비교예 3 | MB5568 | - | - | - | - |
| 비교예 4 | BE0400 | - | - | - | - |
| 비교예 5 | SM100 | - | - | - | - |
| 비교예 6 | 비교제조예 1 | 10 | 3.2 | 4.5 | 20.0 |
| 비교예 7 | 비교제조예 1 | 10 | 2.8 | 4.0 | 21.2 |
| 실시예 1 | 실시예 2 | 비교예 1 | 비교예 2 | 비교예 3 | 비교예 4 | 비교예 5 | 비교예 6 | 비교예 7 | |
| MI2.16 (g/10min) | 0.35 | 0.29 | 1.8 | 0.8 | 0.8 | 0.27 | 1.05 | 0.49 | 0.42 |
| MI5 (g/10min) | 1.48 | 1.24 | 5.94 | 2.72 | 2.92 | 1.12 | 4.11 | 1.99 | 1.72 |
| MFRR (MI5/MI2.16) | 4.24 | 4.27 | 3.3 | 3.4 | 3.65 | 4.15 | 3.91 | 4.07 | 4.09 |
| 밀도 (g/cm3) |
0.954 | 0.955 | 0.953 | 0.953 | 0.956 | 0.959 | 0.951 | 0.952 | 0.952 |
| Tm (°C) | 130.3 | 129.3 | 129.7 | 129.9 | 130.4 | 132.9 | 128.4 | 128.1 | 128.8 |
| Mw (x1000 g/mol) | 138 | 150 | 105 | 130 | 133 | 184 | 112 | 121 | 125 |
| PDI (Mw/Mn) | 10.8 | 11.5 | 17.4 | 16.5 | 22.9 | 13.8 | 11.3 | 12.6 | 12.8 |
| A1 (%) | 0.3 | 0.4 | 2.8 | 2.0 | 3.0 | 0.7 | 1.3 | 0.6 | 0.7 |
| A2 (%) | 3.8 | 4.3 | 6.0 | 4.9 | 6.3 | 5.4 | 5.8 | 5.2 | 6.9 |
| A3 (%) | 12.6 | 13.7 | 8.7 | 10.8 | 10.8 | 11.7 | 9.3 | 10.9 | 11 |
| A2-A1(%) | 3.5 | 3.9 | 3.2 | 2.9 | 3.3 | 4.7 | 4.5 | 4.6 | 6.2 |
| ROL (%) | 7.89 | 9.30 | 46.67 | 40.82 | 47.62 | 12.96 | 22.41 | 11.54 | 10.14 |
| GC Area | 381 | 419 | 4741 | 4077 | 5324 | 1720 | 1148 | 621 | 593 |
| ESCR (hr) | 66.3 | 62.1 | 14 | 47.6 | 47 | 45.8 | 16 | 37.2 | 40.1 |
| TVOC 상대값(%) | 100 | 89 | 748 | 589 | 840 | 364 | 344 | 192 | 158 |
Claims (21)
- 하기 식 1에 따른 선형 구조 분획 비율(ROL)이 10% 이하이고,분자량 분포(Mw/Mn)가 12 이하인,폴리에틸렌 조성물:[식 1]ROL = (A1/A2) × 100상기 식 1에서,ROL는 폴리에틸렌 조성물에 포함되어 있는 선형 구조 분획 비율(%)을 나타낸 것이고,A1은 x 축이 log MW이고 y 축이 dw/dlogMw인 GPC 커브 그래프에서 Log MW 값이 3 미만인 영역의 적분값이 x축 전체 적분값 중에서 차지하는 비율(A1, %)을 나타낸 것이고,A2는 x 축이 log MW이고 y 축이 dw/dlogMw인 GPC 커브 그래프에서 Log MW 값이 3 이상 내지 3.5 미만인 영역의 적분값이 x축 전체 적분값 중에서 차지하는 비율(A2, %)을 나타낸 것이다.
- 제1항에 있어서,상기 선형 구조 분획 비율(ROL)이 3.0% 내지 10.0%인,폴리에틸렌 조성물.
- 제1항에 있어서,x 축이 log MW이고 y 축이 dw/dlogMw인 GPC 커브 그래프에서, Log MW 값이 3 미만인 영역의 적분값이 x축 전체 적분값 중에서 차지하는 비율(A1)이 0.5% 이하인,폴리에틸렌 조성물.
- 제1항에 있어서,x 축이 log MW이고 y 축이 dw/dlogMw인 GPC 커브 그래프에서, Log MW 값이 3 이상 내지 3.5 미만인 영역의 적분값이 x축 전체 적분값 중에서 차지하는 비율(A2)이 3.5% 내지 4.5%인,폴리에틸렌 조성물.
- 제1항에 있어서,x 축이 log MW이고 y 축이 dw/dlogMw인 GPC 커브 그래프에서, Log MW 값이 3 미만인 영역의 적분값이 x축 전체 적분값 중에서 차지하는 비율(A1)과, Log MW 값이 3 이상 내지 3.5 미만인 영역의 적분값이 x축 전체 적분값 중에서 차지하는 비율(A2) 사이에 차이(A2-A1)가 3.0% 내지 4.0%인,폴리에틸렌 조성물.
- 제1항에 있어서,x 축이 log MW이고 y 축이 dw/dlogMw인 GPC 커브 그래프에서, Log MW 값이 5.5 이상인 영역의 적분값이 x축 전체 적분값 중에서 차지하는 비율(A3)이 11.5% 이상인,폴리에틸렌 조성물.
- 제1항에 있어서,분자량 분포(Mw/Mn)가 8.0 내지 12.0인,폴리에틸렌 조성물.
- 제1항에 있어서,밀도(ASTM D 1505, 23 ℃)가 0.945 g/cm3 내지 0.965 g/cm3인,폴리에틸렌 조성물.
- 제1항에 있어서,용융지수(ASTM D 1238, 190 ℃, 2.16kg)가 0.01 g/10min 내지 0.45 g/10min인,폴리에틸렌 조성물.
- 하기 화학식 1로 표시되는 제1 메탈로센 화합물 1종 이상; 및 하기 화학식 2로 표시되는 화합물 중에서 선택되는 제2 메탈로센 화합물 1종 이상의 존재 하에서 에틸렌을 중합하는 단계를 포함하는, 제1항의 폴리에틸렌 조성물의 제조 방법:[화학식 1](Cp1Ra)n(Cp2Rb)M1Z1 3-n상기 화학식 1에서,M1은 4족 전이금속이고;Cp1 및 Cp2는 서로 동일하거나 상이하고, 각각 독립적으로 시클로펜타디엔닐, 인데닐, 4,5,6,7-테트라하이드로-1-인데닐, 및 플루오레닐 라디칼로 이루어진 군으로부터 선택된 어느 하나이고, 이들은 탄소수 1 내지 20의 탄화수소로 치환될 수 있으며;Ra 및 Rb는 서로 동일하거나 상이하고, 각각 독립적으로 수소, C1-20 알킬, C1-10 알콕시, C2-20 알콕시알킬, C6-20 아릴, C6-10 아릴옥시, C2-20 알케닐, C7-40 알킬아릴, C7-40 아릴알킬, C8-40 아릴알케닐, 또는 C2-10 알키닐이고;Z1은 각각 독립적으로 할로겐 원자, C1-20 알킬, C2-10 알케닐, C7-40 알킬아릴, C7-40 아릴알킬, C6-20 아릴, 치환되거나 치환되지 않은 C1-20 알킬리덴, 치환되거나 치환되지 않은 아미노, C2-20 알킬알콕시, 또는 C7-40 아릴알콕시이고;n은 1 또는 0 이고;[화학식 2]상기 화학식 2에서,B는 붕소이고,M은 4족 전이금속이고,R1 내지 R4는 각각 독립적으로, 수소, C1-20 알킬, C3-20 사이클로알킬, 또는 C6-20 아릴이거나, 혹은 R1과 R2 또는 R3와 R4 중 한쌍 이상이 각각 독립적으로 서로 결합하여 치환 또는 비치환된 C6-60 방향족 고리를 형성하고,R5 및 R6는 각각 독립적으로, C1-20 알킬, C3-20 사이클로알킬, 또는 C6-20 아릴이거나, R5와 R6가 서로 결합하여 C3-60 지방족 고리, 또는 C6-60 방향족 고리를 형성하고,X1 및 X2는 각각 독립적으로, C1-20 알킬 또는 -O(CO)R'이고, 여기서 R'은 C1-20 알킬이고,Q는 N, O 및 S로 구성되는 군으로부터 선택되는 어느 하나 이상을 포함하는 치환 또는 비치환된 C2-60 헤테로고리이고,Y와 Y'은 Q를 구성하는 원소이고,Y는 N, O, 또는 S이고,Y'은 Y와 인접한 Q의 원소이고, N 또는 C이다.
- 제10항에 있어서,상기 화학식 1에서, M1은 지르코늄 또는 하프늄이고; Ra 및 Rb는 각각 수소, C1-6 알킬, C7-12 아릴알킬, C2-12 알콕시알킬, C6-12 아릴, 또는 C2-6 알케닐이고; Z1은 각각 할로겐 원자인,폴리에틸렌 조성물의 제조 방법.
- 제10항에 있어서,상기 화학식 2에서, M은 지르코늄인,폴리에틸렌 조성물의 제조 방법.
- 제10항에 있어서,상기 화학식 2에서,R1 내지 R4는 각각 독립적으로, 수소, 또는 메틸이거나, 혹은 R1과 R2 또는 R3와 R4 중 한쌍 이상이 각각 독립적으로 서로 결합하여 벤젠 고리, 또는 1,2,3,4-테트라하이드로나프탈렌 고리를 형성하고,여기서 상기 벤젠 고리, 또는 1,2,3,4-테트라하이드로나프탈렌 고리는 비치환되거나, 메틸, 터트뷰틸 및 4-터트뷰틸 페닐로 이루어진 군에서 선택되는 1개 내지 4개의 치환기로 치환된 것인,폴리에틸렌 조성물의 제조 방법.
- 제10항에 있어서,상기 화학식 2에서, R5 및 R6는 각각 독립적으로, 메틸, 또는 페닐이거나, R5와 R6가 서로 결합하여 사이클로옥테인 고리를 형성하는 것인,폴리에틸렌 조성물의 제조 방법.
- 제10항에 있어서,상기 화학식 2에서, X1 및 X2는 각각 독립적으로, 메틸, 또는 아세테이트인,폴리에틸렌 조성물의 제조 방법.
- 제10항에 있어서,상기 화학식 2에서, Q는 피리딘 고리, 4,5-디하이드로옥사졸 고리, 피라졸 고리, 또는 벤즈옥사졸 고리일 수 있고, 상기 Q는 비치환되거나, 메틸, 이소프로필 및 디페닐아미노로 이루어진 군에서 선택되는 1개 내지 4개의 치환기로 치환된 것인,폴리에틸렌 조성물의 제조 방법.
- 제10항에 있어서,제1 메탈로센 화합물과 제2 메탈로센 화합물은 1:2 내지 1:5의 몰비로 포함되는,폴리에틸렌 조성물의 제조 방법.
- 제10항에 있어서,상기 중합 단계는, 에틸렌의 몰 함량 기준으로 수소 기체를 35 ppm 내지 250 ppm으로 투입하며 수행하는,폴리에틸렌 조성물의 제조 방법.
- 제1항 내지 제9항 중 어느 한 항에 따른 폴리에틸렌 조성물을 포함하는 사출 성형품.
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| US9156970B2 (en) * | 2013-09-05 | 2015-10-13 | Chevron Phillips Chemical Company Lp | Higher density polyolefins with improved stress crack resistance |
| CA2931488A1 (en) * | 2016-05-30 | 2017-11-30 | Nova Chemicals Corporation | Closure having excellent organoleptic performance |
| KR102228534B1 (ko) * | 2016-10-27 | 2021-03-15 | 주식회사 엘지화학 | 내환경 응력 균열성이 우수한 에틸렌/알파-올레핀 공중합체 |
| KR102073253B1 (ko) * | 2016-12-19 | 2020-02-04 | 주식회사 엘지화학 | 혼성 담지 메탈로센 촉매 및 이를 이용한 폴리올레핀의 제조 방법 |
| WO2019124835A1 (ko) * | 2017-12-20 | 2019-06-27 | 주식회사 엘지화학 | 폴리에틸렌 공중합체 및 이의 제조 방법 |
-
2021
- 2021-09-29 BR BR112022009345A patent/BR112022009345A2/pt unknown
- 2021-09-29 US US17/776,852 patent/US20220403070A1/en active Pending
- 2021-09-29 WO PCT/KR2021/013291 patent/WO2022071735A1/ko not_active Ceased
- 2021-09-29 CN CN202180005899.4A patent/CN114599693B/zh active Active
- 2021-09-29 EP EP21876010.6A patent/EP4043519A4/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| US20220403070A1 (en) | 2022-12-22 |
| CN114599693B (zh) | 2024-03-01 |
| EP4043519A4 (en) | 2023-01-11 |
| EP4043519A1 (en) | 2022-08-17 |
| CN114599693A (zh) | 2022-06-07 |
| BR112022009345A2 (pt) | 2023-04-11 |
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