WO2024144125A1 - 폴리에틸렌 수지 조성물 - Google Patents
폴리에틸렌 수지 조성물 Download PDFInfo
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- WO2024144125A1 WO2024144125A1 PCT/KR2023/021363 KR2023021363W WO2024144125A1 WO 2024144125 A1 WO2024144125 A1 WO 2024144125A1 KR 2023021363 W KR2023021363 W KR 2023021363W WO 2024144125 A1 WO2024144125 A1 WO 2024144125A1
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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
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F10/02—Ethene
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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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of 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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
Definitions
- the present invention relates to polyethylene resin compositions that exhibit reduced total volatile organic compound (TVOC) emissions along with excellent stretchability and are useful in the production of stretched films.
- TVOC total volatile organic compound
- biaxially oriented polyethylene (BOPE) film is manufactured by stretching a cast sheet in MD (machine direction) and TD (transverse direction), respectively, and has higher tensile strength, impact strength, and transparency than existing blown films. Significantly superior.
- HDPE high-density polyethylene
- the present invention seeks to provide a polyethylene resin composition that exhibits excellent stretchability and reduced TVOC through control of the crystal structure.
- the present invention seeks to provide a stretched film that exhibits excellent stretchability using the polyethylene resin composition.
- the present invention provides a polyethylene resin composition comprising an ethylene homopolymer or an ethylene/C4 to C10 alpha olefin copolymer and satisfying the conditions (a1) to (a3) below. :
- the elution temperature based on the total peak area is 25 to 30°C.
- the content of the first crystalline polymer defined as the peak area ratio of the fraction eluting in the range, is 0.1 to 1.8%, and the elution temperature based on the total peak area is 40 to 90 ° C.
- the second crystal is defined as the peak area ratio of the fraction eluting in the range.
- the content of sexual polymer is 20 to 40%
- a stretched film containing the polyethylene resin composition is provided.
- a polyethylene resin composition exhibiting excellent stretchability and low TVOC can be provided.
- first and second are used to describe various components, and the terms are used only for the purpose of distinguishing one component from other components.
- MI 2.16 Melt index measured according to the method of ASTM D1238 (condition E, 190 °C, 2.16 kg load): 0.1 g/10min or more, 10 g/10min or less.
- biaxially oriented polyethylene (BOPE) film is manufactured by stretching a cast sheet in MD (machine direction) and TD (transverse direction), respectively. Since biaxial stretching must be performed from MD stretching to TD stretching, excellent stretchability is required for PE for BOPE.
- the polyethylene resin composition according to the present invention is a semi-crystalline polymer and may include a crystalline portion and an amorphous portion. Specifically, the crystalline portion is formed by folding polymer chains containing ethylene repeating units or alpha olefin repeating units to form a bundle, thereby forming a lamellar-type crystalline domain (or segment).
- the inventors of the present invention found that when controlling the content of crystalline polymer in the elution temperature range that affects stretchability and TVOC properties to an optimal range using the TREF analysis method, a conventional polyethylene resin composition having the same density and melt index and The present invention was developed by focusing on the fact that it can have better stretchability and TVOC properties compared to other materials.
- the crystalline polymer eluted in the elution temperature range of 25 to 30°C (hereinafter referred to as ‘first crystalline polymer’) is the soluble fraction.
- the content of the first crystalline polymer originates from the ultra-low molecular weight portion of the polyethylene resin composition and affects TVOC. Specifically, the lower the content of the first crystalline polymer, the lower the TVOC.
- crystalline polymers (hereinafter referred to as 'second crystalline polymers') that elute at an elution temperature range of 40 to 90°C delay secondary crystallization in MD stretching and improve stretchability through interlamellar laternal linking. You can do it.
- the polyethylene resin composition according to the present invention contains a content of 0.1 to 1.8% of the first crystalline polymer, which is eluted at an elution temperature in the range of 25 to 30 °C during TREF analysis, and eluted at an elution temperature in the range of 40 to 90 °C.
- the second crystalline polymer in an amount of 20 to 40%, it is possible to simultaneously improve stretchability and TVOC properties while maintaining excellent mechanical strength properties.
- the content of the first crystalline polymer is 0.1% or more, or 0.5% or more, or 0.7% or more, or 1.1% or more, and 1.8% or less, or 1.5% or less. , or may be 1.4% or less.
- the content of the second crystalline polymer may be 20% or more, or 22% or more, or 25% or more, and 40% or less, or 35% or less, or 31% or less, or 30% or less.
- a TREF analysis graph is derived with the elution temperature (Te) (°C) as the x-axis and the elution amount (dw/dt) as the y-axis, and from the TREF analysis graph, the first and second crystallinity Calculate the polymer content respectively.
- the peak area is obtained by integrating the peaks in the elution temperature range of 25 to 30°C, and then the ratio of the peak area in the corresponding temperature range to the total peak area is calculated as a percentage, and this is calculated as a percentage. It is determined by the content of crystalline polymer (% or area %).
- the melt index (MI 2.16 ) is at least 0.1 g/10min, or at least 0.5 g/10min, or at least 0.7 g/10min, or at least 0.75 g/10min, or at least 0.77 g/10min, or at least 1 g/10min. It may be greater than or equal to 10 min, less than or equal to 10 g/10min, or less than or equal to 5 g/10min, or less than or equal to 3 g/10min, or less than or equal to 2.6 g/10min, or less than or equal to 2 g/10min, or less than or equal to 1.5 g/10min.
- the polymerization temperature (T2) is 65°C or more and less than 80°C, and the pressure (P2) is 3 to 4.5 kgf/cm 2 .
- the first polyethylene transferred from the first reactor is further polymerized by ethylene introduced into the second reactor, or ethylene and C4 to C10 alpha olefin comonomer, A polyethylene resin composition that satisfies the above-mentioned physical property conditions is manufactured.
- a first reactor in which a first slurry polymerization reaction for producing first polyethylene occurs, and a second reactor connected to the first reactor in which a second slurry polymerization reaction occurs may be used.
- the polymerization temperature (T1) may be 70 to 90° C.
- the pressure (P1) may be 5 to 10 kgf/cm 2 . More specifically, the polymerization temperature (T1) is 70°C or higher, or 75°C or higher, or 78°C or higher, and 90°C or lower, or 85°C or lower, or 80°C or lower, and the pressure (P1) is 5 kgf/cm 2 or greater than or equal to 6 kgf/cm 2 , or greater than or equal to 6.5 kgf/cm 2 , or greater than or equal to 6.7 kgf/cm 2 , or greater than or equal to 10 kgf/cm 2 , or greater than or equal to 8 kgf/cm 2 , or greater than or equal to 7.7 kgf/cm 2 , Or it may be 7.4 kgf/cm 2 or less.
- the comonomer may be added in one or more of the first slurry polymerization reaction and the second slurry polymerization reaction.
- the total amount of ethylene and the total amount of comonomers introduced into the first and second reactors may satisfy a weight ratio of 1:0.001 to 1:0.1. More specifically, a weight ratio of 1:0.01 to 1:0.1, or 1:0.012 to 1:0.05, or 1:0.012 to 1:0.025, or 1:0.012 to 1:0.02 may be satisfied.
- the total amount of ethylene and the total amount of comonomer introduced into the first and second reactors satisfy the above weight ratio range, the physical properties of the polyethylene resin composition described above can be more easily implemented.
- R 1 is the same or different and is an alkyl group having 1 to 10 carbon atoms
- R 1 may be an alkyl group having 1 or more carbon atoms, 2 or more carbon atoms, or 3 or more carbon atoms, and 10 or less carbon atoms, 8 carbon atoms or less, or 5 or less carbon atoms.
- the alcohol examples include methanol, ethanol, 1-propanol, isopropanol, n-butanol, isobutanol, 1-pentanol, isopentanol, n-hexanol, 1-octanol, 2-ethyl-1-hexane. All, etc., and any one or a mixture of two or more of these may be used. Among these, ethanol or 2-ethyl-1-hexanol may be used.
- the titanium-containing compound is directly added to the reaction product of the magnesium support and alcohol generated in the support treatment step, or a solution in which the titanium compound is dissolved in a non-polar solvent is added, and the titanium compound is added at a temperature ranging from -50 to -50%. It can be performed by reacting at 120°C, or -20 to 80°C.
- the reaction product between the magnesium support and alcohol produced in the support treatment step may be stirred at 10 to 500 rpm, or 50 to 400 rpm.
- halogenated hydrocarbons are added when alcohol is added to the magnesium support in the support treatment step;
- halogenated hydrocarbon is added when adding the titanium-containing compound in the step of supporting the titanium-containing compound;
- a step of reacting by adding a halogenated hydrocarbon may be further performed.
- the type and content of the halogenated hydrocarbon are the same as described above.
- the Ziegler-Natta catalyst may be used as a cocatalyst along with an organometallic compound represented by the following formula (2).
- M is selected from the group consisting of elements of groups IB, IIA, IIIB and IVB of the periodic table,
- R 2 is the same or different and is an alkyl group having 1 to 10 carbon atoms
- X 2 is halogen
- n is an integer from 1 to 3.
- M is specifically aluminum
- R 2 is an alkyl group having 1 to 5 carbon atoms or 2 to 4 carbon atoms
- X 2 is Cl or Br.
- the cocatalyst may be added to the polyethylene polymerization reaction after being mixed with the Ziegler Natta catalyst, or may be added separately before or after the introduction of the Ziegler Natta catalyst. Accordingly, the method for producing a polyethylene resin composition according to the present invention may further include a step of adding the cocatalyst when producing the first polyethylene in step 1.
- the polymerization reaction in the first step is carried out under the conditions of introducing hydrogen gas.
- the second step takes place in a second reactor connected to the first reactor.
- a pellet-shaped polyethylene resin composition can be manufactured through the melting and extrusion processes described above.
- the antioxidants include phenol-based antioxidants; Phosphorus-based antioxidants; Amine-based antioxidants, etc. may be mentioned, and any one or a mixture of two or more of these may be used.
- Specific examples of the antioxidant include pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], or 1,3,5-trimethyl-2,4, Phenolic antioxidants such as 6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene; tris(2,4-di-tert.-butylphenyl)phosphite, bis(2,4-di-tert.-butylphenyl) pentaerythritol diphosphite, and phosphorus-based antioxidants such as bis(2,4-dicumylphenyl)pentaerythritol diphosphite; or amine-based antioxidants such as phen
- the phenol-based primary antioxidant is added in an amount of 50 ppm or more, or 200 ppm or more, or 250 ppm or more, and 500 ppm or less, or 300 ppm or less, based on the total weight of the polymerization product obtained as a result of the secondary polymerization.
- the phosphorus-based secondary antioxidant may be added in an amount of 100 ppm or more, or 300 ppm or more, or 500 ppm or more, and 1000 ppm or less, or 700 ppm or less, based on the total weight of the polymerization product obtained as a result of secondary polymerization.
- the polyethylene resin composition contains the phenol-based primary antioxidant in a content of 50 ppm or more, or 200 ppm or more, or 250 ppm or more, and 500 ppm or less, or 300 ppm or less, based on the total weight of the resin composition,
- the phosphorus-based secondary antioxidant may be included in an amount of 100 ppm or more, or 300 ppm or more, or 500 ppm or more, and 1000 ppm or less, or 700 ppm or less.
- extrusion may be performed at a temperature of 180 to 220°C, or 180 to 210°C, using an extruder such as a twin screw extruder.
- VOC volatile organic compound
- volatile organic compounds can be defined as all organic compounds that exist in a gaseous state in the atmosphere. It is used to refer to all organic substances that can exist in a gaseous state at room temperature and pressure, such as hydrocarbons consisting of only carbon and hydrogen, halogenated hydrocarbons, and hydrocarbons containing nitrogen or sulfur. In a broad sense, semi-volatile organic compounds can also be included.
- volatile organic compounds may be organic solvents, thermal decomposition by-products of hardeners, or by-products generated from addition reactions.
- the polyethylene resin composition was exposed to a temperature of 200°C for 10 minutes and then the total volatile organic compounds (GC/MS-TD) calculated through thermal desorption gas chromatography (Gas Chromatography/Mass Spectrometry-Thermal Desorption, GC/MS-TD) analysis.
- TVOC emission is 150 ⁇ g/g or less, or 110 ⁇ g/g or less. Since the smaller the TVOC emission, the better, the lower limit is not particularly limited, but may be, for example, 10 ⁇ g/g or more, or 50 ⁇ g/g or more.
- the TVOC emission amount of the polyethylene resin composition was determined by dissolving the polyethylene resin composition in a toluene standard solution to prepare a sample, exposing it to a high temperature of 300°C for 10 minutes, and then using thermal desorption gas chromatography (Gas Chromatography/ Mass Spectrometry-Thermal Desorption, GC/MS-TD), and based on the chromatogram obtained as a result of the above analysis, the VOC value ( ⁇ g/g) of each substance generated in the measured sample was calculated according to Equation 1 below. Afterwards, TVOC emissions ( ⁇ g/g) can be calculated by adding them up.
- a compound Peak area of individual substances generated in the measurement sample after exposure to high temperature
- the peak areas of individual substances generated in the measurement sample and the peak area of the toluene standard solution are obtained through integration for each peak.
- / ⁇ L or more or about 0.8 ⁇ g/ ⁇ L or more, or about 1.0 ⁇ g/ ⁇ L or more, or about 1.2 ⁇ g/ ⁇ L or more, and about 3.5 ⁇ g/ ⁇ L or less, or about 3.0 ⁇ g/ ⁇ L or less, or about 2.8 ⁇ g/ ⁇ L or less than or equal to about 2.5 ⁇ g/ ⁇ L, or less than or equal to about 2.2 ⁇ g/ ⁇ L, or less than or equal to about 2.0 ⁇ g/ ⁇ L, or less than or equal to about 1.9 ⁇ g/ ⁇ L, or less than or equal to about 1.7 ⁇ g/ ⁇ L, or less than or equal to about 1.5 ⁇ g/ ⁇ L, Or it may be about 1.4 ⁇ g/ ⁇ L or less.
- a stretched film manufactured using the above-described polyethylene resin composition is provided.
- the stretched film may specifically be a uniaxially stretched film or a biaxially stretched film.
- the stretched film exhibits excellent stretchability and TVOC properties as it contains a polyethylene resin composition that satisfies the above-mentioned combination physical property requirements. Specifically, the stretched film has a maximum stretching ratio in the TD (transverse direction) direction of 6 to 8 times.
- a Ziegler-Natta catalyst supported on magnesium chloride was prepared in the same manner as in Preparation Example 1, except that anhydrous 2-ethyl-1-hexanol was changed to ethanol.
- the polyethylene resin compositions of the examples and comparative examples were extruded using Bruckner's Lab extruder line (L/D ratio: 42, Screw diameter: 25 mm, Melt/T-Die temperature: 250°C). 0.72 mm Cast sheets of each thickness were manufactured.
- the amount of TVOC (total volatile organic compounds) released was analyzed by thermal desorption gas chromatography (Gas Chromatography/Mass Spectrometry-Thermal Desorption, GC/MS-TD) after exposing the polyethylene resin composition samples of the examples and comparative examples to high temperature. And, the TVOC emission amount was calculated by adding up the individual VOC values generated from the measured samples.
- the VOC value ( ⁇ g/g) of each substance generated in the measurement sample was calculated according to Equation 1 below, and then added to calculate the TVOC emission amount ( ⁇ g/g).
- W sample Weight of the measured sample (g) (the weight of the sample in this test example is 20 mg, that is, 0.02g)
- the peak areas of individual substances occurring in the measurement sample and the peak area of the toluene standard solution were obtained through integration for each peak.
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Abstract
Description
| 밀도 (g/cm3) |
MI2.16
(g/10min) |
MFRR (MI5/MI2.16) |
제1결정성 중합체의 함량 (%) |
제2결정성 중합체의 함량 (%) |
|
| 실시예 1 | 0.960 | 0.77 | 3.89 | 0.7 | 22 |
| 실시예 2 | 0.950 | 1.24 | 4.52 | 1.5 | 31 |
| 실시예 3 | 0.961 | 2.51 | 2.83 | 1.4 | 25 |
| 실시예 4 | 0.954 | 1.19 | 4.11 | 1.1 | 28 |
| 비교예 1 | 0.962 | 0.87 | 3.60 | 1.1 | 3 |
| 비교예 2 | 0.960 | 0.72 | 3.86 | 1.8 | 7 |
| 비교예 3 | 0.953 | 0.90 | 3.89 | 3.3 | 27 |
| 비교예 4 | 0.956 | 1.72 | 3.87 | 2.5 | 24 |
| 비교예 5 | 0.969 | 1.12 | 3.35 | 2.0 | 11 |
| 비교예 6 | 0.927 | 1.69 | 3.02 | 7.8 | 36 |
| 비교예 7 | 0.952 | 0.9 | 3.89 | 2.2 | 15.8 |
| 비교예 8 | 0.964 | 0.02 | 3.42 | 0.1 | 5.2 |
| 비교예 9 | 0.953 | 21.3 | 3.05 | 2.7 | 29.4 |
| Sheet 연신성 (%) |
Film 연신성 (TD 방향 최대 연신비, 배수) |
TVOC 방출량 [㎍/g] |
|
| 실시예 1 | 1133.3 | 6 | 50 |
| 실시예 2 | 1625.2 | 8 | 110 |
| 실시예 3 | 1369.5 | 7 | 90 |
| 실시예 4 | 1417.3 | 7 | 60 |
| 비교예 1 | 616.5 | 4 | 100 |
| 비교예 2 | 382.8 | 3 | 180 |
| 비교예 3 | 901.5 | 6 | 250 |
| 비교예 4 | 812.4 | 5 | 190 |
| 비교예 5 | 56.5 | 2 | 170 |
| 비교예 6 | 1080.3 | 6 | 250 |
| 비교예 7 | 701.5 | 4 | 190 |
| 비교예 8 | 96.7 | ND | 120 |
| 비교예 9 | 1693.0 | ND | 230 |
Claims (10)
- 에틸렌 호모 중합체 또는 에틸렌/C4 내지 C10의 알파 올레핀 공중합체를 포함하며,하기 (a1) 내지 (a3)의 조건을 만족하는, 폴리에틸렌 수지 조성물:(a1) 온도 상승 용리 분별(TREF) 분석시, 용리 온도(Te)를 x축으로 하고, 용출량(dw/dt)을 y축으로 하는 TREF 분석 그래프에서, 전체 피크 면적 기준 용리 온도 25 내지 30℃ 범위에서 용출되는 분획의 피크 면적비로 정의되는 제1결정성 중합체의 함량이 0.1 내지 1.8%이고, 및 전체 피크 면적 기준 용리 온도 40 내지 90℃ 범위에서 용출되는 분획의 피크 면적비로 정의되는 제2결정성 중합체의 함량이 20 내지 40%,(a2) ASTM D1505의 방법에 따라 23℃ 온도에서 측정한 밀도: 0.940 g/cm3 이상,(a3) ASTM D1238 (조건 E, 190 ℃, 2.16kg 하중)의 방법에 따라 측정한 용융지수(MI2.16): 0.1 g/10min 이상이고, 10 g/10min 이하.
- 제1항에 있어서,상기 폴리에틸렌 수지 조성물은 상기 제1결정성 중합체의 함량이 0.5 내지 1.5%이고, 상기 제2결정성 중합체의 함량이 20 내지 35%인, 폴리에틸렌 수지 조성물.
- 제1항에 있어서,상기 폴리에틸렌 수지 조성물은 밀도가 0.950 내지 0.970 g/cm3인, 폴리에틸렌 수지 조성물.
- 제1항에 있어서,상기 폴리에틸렌 수지 조성물은 ASTM D1238 (조건 E, 190 ℃, 2.16kg 하중)의 방법에 따라 측정한 용융 지수(MI2.16)가 0.5 내지 3 g/10min인, 폴리에틸렌 수지 조성물.
- 제1항에 있어서,상기 폴리에틸렌 수지 조성물은, ASTM D1238의 방법에 따라 190℃의 온도 및 21.6 kg의 하중 하에서 측정한 용융지수(MI21.6)를 190℃의 온도 및 2.16 kg의 하중 하에서 측정한 용융지수(MI2.16)로 나눈 비율인 MFRR(MI21.6/MI2.16)이 2 내지 5인, 폴리에틸렌 수지 조성물.
- 제1항에 있어서,상기 폴리에틸렌 수지 조성물은 에틸렌 호모 중합체, 에틸렌/1-부텐 공중합체, 또는 에틸렌/1-헥센 공중합체를 포함하는, 폴리에틸렌 수지 조성물.
- 제1항에 있어서,상기 폴리에틸렌 수지 조성물은, 톨루엔 표준 용액에 폴리에틸렌 수지 조성물을 용해시켜 제조한 측정 시료를 300℃의 온도에서 10 분간 노출시킨 후 열 탈착 가스 크로마토그래프 분석하고, 결과로부터 하기 수학식 1에 따라 측정 시료에서 발생한 개별 물질의 휘발성 유기 화합물 양(㎍/g)을 산출한 후, 합산하여 구한 총 휘발성 유기 화합물 방출량이 150 ㎍/g 이하인, 폴리에틸렌 수지 조성물.[수학식 1]VOCcompound = [(Acompound / Astd) x Cstd] / WsampleVOCcompound: 측정 시료에서 발생한 개별 물질의 휘발성 유기 화합물(VOC) 양 (㎍/g)Acompound: 측정 시료에서 발생한 개별 물질의 피크 면적Astd: 톨루엔 표준용액의 피크 면적Cstd: 톨루엔 사용 중량(㎍)Wsample: 측정 시료의 중량(g)
- 제1항에 따른 폴리에틸렌 수지 조성물을 포함하는, 연신 필름.
- 제8항에 있어서,상기 연신 필름은 TD (transverse direction) 방향 최대 연신비가 6 내지 8배인, 연신 필름.
- 제8항에 있어서,상기 연신 필름은 일축 연신 필름 또는 이축 연신 필름인, 연신 필름.
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|---|---|---|---|
| CN202380032056.2A CN118974161A (zh) | 2022-12-29 | 2023-12-22 | 聚乙烯树脂组合物 |
| EP23912800.2A EP4484490A4 (en) | 2022-12-29 | 2023-12-22 | POLYETHYLENE RESIN COMPOSITION |
| US18/853,524 US20250215124A1 (en) | 2022-12-29 | 2023-12-22 | Polyethylene Resin Composition |
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| KR10-2022-0189077 | 2022-12-29 | ||
| KR1020230187174A KR20240106984A (ko) | 2022-12-29 | 2023-12-20 | 폴리에틸렌 수지 조성물 |
| KR10-2023-0187174 | 2023-12-20 |
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| CN119165092A (zh) * | 2024-11-21 | 2024-12-20 | 上海石化西尼尔化工科技有限公司 | 聚乙烯材料中抗氧剂含量检测方法及系统 |
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| EP2158262B1 (en) * | 2007-06-13 | 2011-04-20 | Dow Global Technologies LLC | Polyethylene compositions, methods of making the same, and articles prepared therefrom |
| WO2017040127A1 (en) * | 2015-08-28 | 2017-03-09 | Dow Global Technologies Llc | Chromatography of polymers with reduced co-crystallization |
| US11339279B2 (en) * | 2020-04-01 | 2022-05-24 | Chevron Phillips Chemical Company Lp | Dual catalyst system for producing LLDPE and MDPE copolymers with long chain branching for film applications |
| EP4467604A4 (en) * | 2022-11-02 | 2025-07-09 | Lg Chemical Ltd | POLYETHYLENE COMPOSITION AND BIAXIALLY STRETCHABLE FILM COMPRISING IT |
| EP4509559A4 (en) * | 2023-05-16 | 2025-10-15 | Lg Chemical Ltd | POLYETHYLENE RESIN COMPOSITION |
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- 2023-12-22 EP EP23912800.2A patent/EP4484490A4/en active Pending
- 2023-12-22 WO PCT/KR2023/021363 patent/WO2024144125A1/ko not_active Ceased
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| JP2014518928A (ja) * | 2011-05-27 | 2014-08-07 | ダウ グローバル テクノロジーズ エルエルシー | 押し出しプロセスの間のチルロールビルドアップが低減されるポリエチレンブレンド組成物 |
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| JP2019532833A (ja) * | 2016-08-24 | 2019-11-14 | ダウ グローバル テクノロジーズ エルエルシー | 多層フィルムおよびそれらの方法 |
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| CN119165092A (zh) * | 2024-11-21 | 2024-12-20 | 上海石化西尼尔化工科技有限公司 | 聚乙烯材料中抗氧剂含量检测方法及系统 |
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| EP4484490A1 (en) | 2025-01-01 |
| US20250215124A1 (en) | 2025-07-03 |
| EP4484490A4 (en) | 2025-10-15 |
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