JP2003082173A - Polyethylene composition and molded product formed therefrom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a polyethylene composition that can be suitably used for the manufacture of a molded product such as a film, a sheet and is excellent in recyclability, is inhibited from being hydrolyzed and is free of taste and smell, and that is excellent in processing thermal stability such as excellent in discoloration resistance with the inhibition of generation of fish eyes, excellent in continuous production with a small change in melt flowability, or the like, and provide a molded product formed from the polyethylene composition. SOLUTION: The polyethylene composition comprises 100 pts.wt. polyethylene comprising not less than 50 wt.% ethylene/α-olefin copolymer prepared by using a metallocene catalyst and having a specific density, a specific melt flow rate and a specific melt flow rate ratio, 0.01-0.5 pts.wt. component represented by formula (1), 0.01-0.5 pts.wt. component represented by formula (2) and 0.01-0.5 pts.wt. component represented by formula (3).

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a polyethylene composition and a molded product obtained by molding using the same. The polyethylene composition of the present invention is suitable for producing molded products such as films and sheets, has excellent recyclability, is excellent in processing heat stability and discoloration resistance during recycling, and is less likely to cause eye blemishes during molding. It is a thing. Molded products such as films and sheets obtained from the polyethylene composition of the present invention are excellent in recyclability, processing heat stability, and discoloration resistance.

[0002]

In the molding of films, sheets and the like, it is common practice to mold the molded product again with the raw materials. From a resin standpoint, this method is
It will be subjected to multiple heat histories and will be more susceptible to deterioration due to heat and oxidation. In order to solve this problem, the addition of an antioxidant to the resin has provided a resin that is not easily deteriorated even by a plurality of thermal history. The present invention can be suitably used for the production of a molded product such as a film or a sheet, has excellent recyclability, is suppressed in hydrolyzability, and has no taste odor.
It is an object of the present invention to provide a polyethylene composition excellent in discoloration resistance that suppresses the generation of fish eyes, excellent in continuous productivity with little change in fluidity and excellent in heat stability during processing, and a molded product thereof.

[0003]

The present invention has the following characteristics.
Ethylene produced from metallocene catalyst having (A)
-Polyester containing 50% by weight or more of α-olefin copolymer
100 parts by weight of ethylene and a component represented by the following general formula (1)
0.01 to 0.5 parts by weight, represented by the following general formula (2)
0.01 to 0.5 parts by weight of the component and the following general formula (3)
Polyethylene containing 0.01 to 0.5 parts by weight of the represented components
Ren composition. (A) Ethylene-α-olefin copolymer: (A-1) Density (d) is 0.88 to 0.96 (g / c
m³). (A-2) Melt at 190 ° C. and 2.16 kg load
Flow rate (MFR _2.16) Is 0.01 to 200 (g
/ 10 minutes). (A-3) Melt at 190 ° C. and 10.0 kg load
Flow rate (MFR _10.0) And 190 ℃, 2.16Kg
Melt flow rate under load (MFR_2.16) With
(MFR_10.0) / (MFR_2.16) Is 1 to 20.

[Chemical 4] (In the formula, R ¹ represents a hydrogen atom or a methyl group, R ² and R ³ represent a tert-butyl group, and R ⁴ represents an alkyl group having 1 to 30 carbon atoms.)

[Chemical 5] (In the formula, R ⁵ and R ⁶ represent a tert-butyl group.)

[Chemical 6] (In the formula, R ⁷ and R ⁸ represent a tert-butyl group,
R ⁹ represents an alkyl group having 1 to 30 carbon atoms. )

Further, the present invention relates to a molded product obtained by molding the above polyethylene composition.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The polyethylene composition of the present invention comprises
100 parts by weight of polyethylene containing 50% by weight or more of an ethylene-α-olefin copolymer produced from a metallocene catalyst having the following characteristic (A), and a component represented by the following general formula (1): 0.01 to 0. 5 parts by weight, preferably 0.015 to 0.4 parts by weight of the component, more preferably 0.1.
02-0.3 parts by weight, more preferably 0.02-component
0.2 part by weight, particularly preferably 0.03 to 0.1 part by weight of the component, and 0.01 to 0.
5 parts by weight, preferably 0.02 to 0.4 parts by weight of the component, more preferably 0.03 to 0.3 parts by weight of the component, more preferably 0.04 to 0.2 parts by weight of the component, particularly preferably component 0. 0.05 to 0.15, and 0.01 to 0.5 parts by weight of the component represented by the following general formula (3), preferably component 0.
03-0.4 parts by weight, more preferably component 0.05-
0.3 parts by weight, more preferably 0.07-0.25
It is a polyethylene composition containing parts by weight, particularly preferably 0.1 to 0.2 parts by weight.

Characteristic (A): Manufactured from metallocene catalyst
Ethylene-α-olefin copolymer. (A-1) Density (d) is 0.88 to 0.96 (g / c
m³), Preferably 0.885 to 0.958 (g / c
m³), And more preferably 0.89 to 0.957 (g /
cm³), More preferably 0.90 to 0.955 (g /
cm³), Particularly preferably 0.91 to 0.95 (g / c
m³) Range. (A-2) Melt at 190 ° C. and 2.16 kg load
Flow rate (MFR _2.16) Is 0.01 to 200 (g
/ 10 minutes), preferably 0.05 to 150 (g / 10
Min), more preferably 0.1-50 (g / 10 min),
More preferably 0.2 to 20 (g / 10 minutes), particularly preferably
It is preferably in the range of 0.5 to 10 (g / 10 minutes). (A-3) Melt at 190 ° C. and 10.0 kg load
Flow rate (MFR _10.0) And 190 ℃, 2.16Kg
Melt flow rate under load (MFR_2.16) With
(MFR_10.0) / (MFR_2.16) Is 1-20, preferred
1.5 to 15, more preferably 2 to 10, and more preferably
The range is preferably 3 to 8, and particularly preferably 4 to 7.

[0007]

[Chemical 7] (In the formula, R ¹ represents a hydrogen atom or a methyl group, R ² and R ³ represent a tert-butyl group, and R ⁴ represents an alkyl group having 1 to 30 carbon atoms, preferably 1 to 25 carbon atoms. alkyl group, more preferably an alkyl group having 1 to 20 carbon atoms, more preferably an alkyl group having 1 to 10 carbon atoms, .R ⁴ particularly preferably represents an alkyl group having 1 to 4 carbon atoms,
Straight-chain alkyl groups are preferred. )

[0008]

[Chemical 8] (In the formula, R ⁵ and R ⁶ represent a tert-butyl group.)

[0009]

[Chemical 9] (In the formula, R ⁷ and R ⁸ represent a tert-butyl group,
R ⁹ is an alkyl group having 1 to 30 carbon atoms, preferably an alkyl group having 3 to 26 carbon atoms, and more preferably 5 to 5 carbon atoms.
A 24 alkyl group, more preferably an alkyl group having 10 to 24 carbon atoms, and most preferably an alkyl group having 15 to 22 carbon atoms. R ⁹ is preferably a linear alkyl group. )

Among the characteristics of the ethylene-α-olefin copolymer produced from the above metallocene catalyst, (1) the density within the above range is preferable because of excellent processing heat stability. If the density is less than the above range,
The molded article may be inferior in blocking property and is difficult to handle, which is not preferable. (2) A MFR _2.16 within the above range is preferable because of excellent processing heat stability. If the MFR _2.16 is smaller than the above range, the motor load and the resin pressure increase during molding, resulting in poor moldability, and if the MFR _2.16 is large, the appearance of the molded product may be poor. (3) (MFR _10.0 ) / (MFR _2.16 ) within the above range is preferable because of excellent processing heat stability. (MFR
_{When 10.0} ) / (MFR _2.16 ) is smaller than the above range, the motor load and the resin pressure increase during the molding process and the moldability is deteriorated, which is not preferable.

In the polyethylene composition of the present invention, the above-mentioned general formula (1) is added to 100 parts by weight of polyethylene.
When the blending amounts of (2) and (3) are within the above ranges, the heat stability and the heat stability of discoloration are excellent, the taste and smell are excellent, the moldability is excellent, and the recyclability is excellent.

The ethylene-α-olefin copolymer comprises ethylene and an α-olefin having 3 to 10 carbon atoms in the presence of a metallocene catalyst.
-Can be produced by copolymerization with olefins.
Examples of the α-olefin having 3 to 10 carbon atoms include propylene, butene-1, pentene-1, hexene-1, 4-.
Methylpentene-1, octene-1, cyclohexene and the like can be mentioned.

The repeating unit derived from the α-olefin in the above copolymer of ethylene and α-olefin is
Usually, it is preferably in the range of 15 mol% or less, more preferably in the range of 0.1 to 10 mol%, and particularly preferably 0.1.
It is contained in the range of 1 to 8 mol%. The α-olefin may be used alone or in combination of two or more in the ethylene-α-olefin copolymer.

As the metallocene catalyst, known metallocene catalysts can be used. The metallocene catalyst includes a combination of a metallocene compound of a transition metal of Group IV or V of the periodic table, an organoaluminum compound and / or an ionic compound, an organoaluminumoxy compound, and a ligand having a cyclopentadienyl skeleton. Periodic table No.
Known metallocene catalysts for olefin polymerization, such as group IV or group V transition metal compounds, can be used.

As the transition metal of Group IV or V of the periodic table,
Titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V) and the like are preferable.

The metallocene compound is a compound bridged by at least one cyclopentadienyl group, a substituted cyclopentadienyl group, hydrocarbyl silicon, etc., and a cyclopentadienyl group bridged by oxygen, nitrogen and phosphorus atoms. Any known metallocene compound having the above as a ligand can be used.

Specific examples of these metallocene compounds include dimethylsilyl (2,4-dimethylcyclopentadienyl) (3 ', 5'-dimethylcyclopentadienyl) zirconium dichloride and dimethylsilyl (2,4-dimethyl). Silicon bridged metallocene compounds such as cyclopentadienyl) (3 ', 5'-dimethylcyclopentadienyl) hafnium dichloride, ethylenebisindenylzirconium dichloride, ethylenebisindenylhafnium dichloride, ethylenebis (methylindenyl)
Examples thereof include indenyl-based crosslinkable metallocene compounds such as zirconium dichloride and ethylenebis (methylindenyl) hafnium dichloride.

The organoaluminum compound used in combination with the metallocene compound in the present invention has a general formula:
A linear or cyclic polymer represented by (-Al (R) O-) n (R is a hydrocarbon group having 1 to 10 carbon atoms, and is partially substituted with a halogen atom and / or an RO group. And n is a degree of polymerization and is 5 or more, preferably 10 or more), and specific examples thereof are methylalumoxane, ethylalumoxane and isobutylethylalumoxane in which R is a methyl, ethyl or isobutyl group, respectively. And so on.

Examples of other organoaluminum compounds include trialkylaluminum, dialkylhalogenoaluminum, sesquialkylhalogenoaluminum, alkenylaluminum, dialkylhydroaluminum and sesquialkylhydroaluminum.

The ionic compound is represented by the general formula: C ⁺
A ^- is represented by, C ⁺ is an organic compound, an organometallic compound, or oxidizing cations of an inorganic compound, or a Bronsted acid comprising a Lewis base and a proton, the metallocene reacts with the anion of metallocene ligands Cations can be generated. Specific examples thereof include JP-A-4-253711, JP-A-4-305585,
JP-A-5-507756, JP-A-5-502906
It is possible to use the one described in the publication.

Particularly, an ionic compound of a tetrakis (pentafluorophenyl) borate anion and a triphenylcarbonium cation or a dialkylanilinium cation is preferable. These ionic compounds can be used in combination with the above-mentioned organoaluminum compound.

Ethylene and C3 with metallocene catalyst
As a method of copolymerization with α-olefin of 10 to 10, various well-known methods can be adopted, and fluidized bed gas phase polymerization or stirred gas phase polymerization in an inert gas, in an inert solvent. Well-known polymerization methods such as slurry polymerization of, and bulk polymerization using a monomer as a solvent can be used.

The polyethylene is, in addition to the ethylene-α-olefin copolymer (A) produced from a metallocene catalyst, an ethylene-α-olefin copolymer produced from a low-density polyethylene, a high-density polyethylene or a metallocene catalyst. 50% by weight or less, preferably 40% by weight of an ethylene-based resin such as an ethylene-α-olefin copolymer other than
It can be contained in an amount of not more than 30% by weight, more preferably not more than 30% by weight, still more preferably not more than 20% by weight, especially not more than 10% by weight.

Examples of the high-density polyethylene include polyethylene homopolymers and copolymers of ethylene and a small amount of α-olefin. For example, the Phillips method obtained by polymerizing with ethylene and alumina or silica-alumina-supported chromium oxide catalysts, etc. The standard method obtained by polymerizing with polyethylene and alumina-supported molybdenum oxide catalysts. Examples thereof include polyethylene and polyethylene obtained by polymerizing using a Ziegler type catalyst composed of a transition metal compound and an organometallic compound.

As the low-density polyethylene, high-pressure low-density polyethylene which can be produced by high-pressure radical polymerization can be used. As the low-density polyethylene such as the high-pressure low-density polyethylene, a homopolymer of ethylene and a copolymer with another monomer such as an ethylene-vinyl acetate copolymer can be used. Ethylene
When a vinyl acetate copolymer is used, the repeating unit derived from vinyl acetate in the copolymer is usually 20 wt.
% Or less is preferable.

The above polyethylene or the polyethylene composition of the present invention is prepared by mixing the components using various kneaders such as a Banbury mixer, a roll mixer, a kneader, a high speed rotary mixer, an extruder, etc., preferably a single screw or twin screw extruder.・ It can be obtained by kneading. It is also possible to knead during film inflation or T-die molding. It is also possible to mix by solution blending using a suitable good solvent.

The polyethylene composition of the present invention or the above polyethylene is a lubricant such as higher fatty acid, higher aliphatic amide, metallic soap, glycerin ester, etc., depending on the application.
Natural silica, synthetic silica, talc, synthetic zeolite, P
Cross-linked MMA, anti-blocking agent such as diatomaceous earth, phenol-based, phosphorus-based, antioxidants such as BHT, ultraviolet absorbers such as benzophenone, benzotriazole and HALS, aluminum hydroxide, magnesium hydroxide, phosphorus-based, halogen-based, etc. Flame retardant, silica, calcium carbonate,
Inorganic / organic fillers such as mica and carbon black, pigments such as azo-based, phthalocyanine-based, quinacridone-based, iron oxide, ultramarine blue, antistatic agents, surfactants, etc. are added within a range not impairing the characteristics of the present invention. be able to. The higher fatty acid and / or higher aliphatic amide is polyethylene 100
The range is preferably 100 to 2000 ppm, more preferably 200 to 1500 ppm, based on parts by weight,
It can be added more preferably in the range of 300 to 1000 ppm, particularly preferably in the range of 400 to 800 ppm.

The polyethylene composition of the present invention can be easily formed into a film or sheet such as T-die molding, inflation molding, calender molding and the like, and can be used in various kinds of materials such as stationery, construction, materials, foods, cosmetics and pharmaceuticals. Can manufacture films, sheets, etc.

[0029]

EXAMPLES The present invention will be described below with reference to examples and comparative examples, but the present invention is not limited to these examples. The characteristic values were measured as follows.

Of polyethylene and polyethylene compositions
Measuring method [1] Density: 190 according to JIS K7112
Obtained during MFR measurement at 2.16 kg load at ℃
The strands at 100 ° C for 1 hour
Measure the sample slowly cooled to room temperature using a density gradient tube.
It was [2] Melt flow rate (MFR_2.16): JIS
19 using a melt indexer in accordance with K7210
Strand for 10 minutes at 2.16 kg load at 0 ° C
By measuring the weight of the resin extruded
I have [3] Melt flow rate ratio (MFR_10.0) / (MFR
_2.16): Same as the above [2] Melt flow rate method
MFR calculated with 10.0kg load_10.0To MFR _2.16so
The divided value.

Evaluation method of polyethylene composition 1. Thermal stability evaluation (processing thermal stability evaluation) (1) Pellet preparation: Dry blending with ethylene-α-olefin copolymer, 500 ppm of calcium stearate (manufactured by NOF Corporation) as an additive and a stabilizer,
A twin-screw extruder (made by Ikegai Tekko Co., Ltd., model: PCM45) is kneaded and extruded to obtain pellets. (2) Repeated extrusion: 100 pellets obtained in (1) above
Extruder (FS65 manufactured by Ikegai Tekko KK, L / D: 28,
Screw: full flight, compression ratio: 2.7, set temperature: 250 ° C, discharge rate: about 36 kg / hour, resin temperature: 2
70 ° C, mesh: # 200, atmosphere: open air)
Extrusion is repeated using the
The resin extruded at 10 and 10 is cut to about 5 mm and repeatedly extruded pellets are obtained. For repeatedly extruded pellets, melt flow rate, melt flow rate ratio, kneader torque, fish eye and pellet color are evaluated.

(2-1) Evaluation of kneading machine torque: Evaluation of kneading of the repeatedly extruded pellets obtained in the above (2) was carried out.
Brabender (Bravender Plastograph W50E)
Was performed as follows. The kneading conditions are as follows: sample amount: 40 g, set temperature: 230 ° C., rotation speed: 50 rp
m, resin temperature: about 240 ° C., atmosphere: open to the atmosphere, kneading time: maximum 20 minutes. The evaluation is performed by the following method. As an example of the Brabender kneading time and the kneading torque, a curve as shown in FIG. 1 is obtained. In the initial stage of kneading, the resin temperature is low and the torque is high, and thereafter the torque gradually decreases due to the increase in the resin temperature, and the state where the torque change is small continues. The torque bottom point is the smallest torque value (torque A) within 10 minutes from the start of kneading. When kneading further,
The torque value starts rising. The point at which the torque increases by 10% from the torque bottom point is referred to as torque B. A straight line including the torque A and having a constant kneading torque regardless of the kneading time is X. A tangent line Y at the torque B is drawn on the curve of the kneading torque and the kneading time, the kneading time (C) at the intersection of the tangent line Y and the straight line X is read, and this read kneading time (C) is increased by the kneading machine torque. Time. As an evaluation, the larger the kneading machine torque rise time, the better the processing heat stability.

(2-2) Evaluation of fish eye: 10 kg of the repeated extrusion pellets obtained in the above (2) was used for a small T die molding machine (extruder: 30 mmφ full flight screw, T die: 300 mm width, cooling roll surface: mirror surface). A film having a thickness of 50 μm is formed by the method of FIG. This film is a defect inspection machine (Keyence product, detection device: CCD camera)
Measure the number of fish eyes (number / m ² ). The measurement results are L (1 mm or more), M (0.5
~ 1 mm), S (0.2 to 0.5 mm), SS (0.1
.About.0.2 mm). The molding conditions are as follows: molding temperature: 200 ° C., cooling roll temperature: 40
C., molding speed: 8 m / min.

(2-3) Evaluation of pellet color: YI and W (B) of the repeatedly extruded pellets obtained in (2) above.
The Y value is measured with a color difference meter (ND1001DP, manufactured by Nippon Denshoku). (3) Frequency of eye blemishes: During the above (2) repeated extrusion evaluation test, eye blemishes may occur around the resin strand at the die exit of the extruder. When it is judged by visual observation that stable pellets cannot be obtained from the extruder, it is necessary to remove the eye die near the die. The perforation frequency (number of times / 500 kg of resin) is the weight of the extruded resin of 500 k.
It is the number of removal of eye blemishes per g. The average of all the tests conducted with the same composition was used as the eye bleeding frequency.

2. Evaluation of Hydrolyzability The pellet obtained in the above (1) is left in a constant temperature and humidity bath at a temperature of 60 ° C. and a relative humidity of 80% for 45 days, 60 days and 90 days in the atmosphere. The kneading machine torque is evaluated for the pellets left to stand, and the hydrolyzability of the pellets is evaluated. In the evaluation of the kneading machine torque, when the value of the motor load does not change significantly within 20 minutes of the kneading time, it is evaluated that the hydrolyzability is excellent.

3. Evaluation of taste and odor 150 g of pellets obtained in the above (1) and natural water heated to 85 ° C. (manufactured by Suntory Ltd., trade name: Japanese natural water) 3
Put 60 ml in a glass container in a hermetically sealed state, and put it in a cool dark place.
Leave for 0 days. Then, the natural water (standard) which carried out the same operation without adding the pellets and the natural water containing the pellets are evaluated in four stages in terms of odor and taste. Evaluation is done by humans. ◎: Odor (taste) equivalent to standard natural water, ○: Slight odor (taste) than standard natural water, △: Slight odor (taste) than standard natural water, ×: Standard It has a distinct odor (taste) than natural water.

Examples 1 and 2, Comparative Examples 1 to 3 (1) Sample Preparation According to (1) Pellet preparation of thermal stability evaluation (processing thermal stability evaluation), polyethylene, additive A and additive shown in Table 1 were prepared. B, additive C and additive D in the amounts shown in Table 2, and 500 ppm of calcium stearate (manufactured by NOF CORPORATION) as a stabilizer were further added, dry blended, and then twin-screw extruder (manufactured by Ikegai Tekko Co., Ltd., model : PCM45) and kneaded and extruded to obtain pellets. Using these pellets, thermal stability was evaluated, the results are shown in Table 3, the hydrolyzability is evaluated in Table 4, and the taste and odor are evaluated in Table 5. As the polyethylenes PE1 and PE2 in Table 1, ethylene-α-olefin copolymers obtained by copolymerizing ethylene and hexene-1 with a metallocene catalyst by a gas phase fluidized bed polymerization method are used, and the characteristics are shown in Table 1. Shown in.

As additive A, Irganox 1076
(General formula (4) manufactured by Ciba Specialty Chemicals, Inc.) is used as an additive B, and Irgafos16 is used.
8 (manufactured by Ciba Specialty Chemicals, general formula (5)) was used as additive C
bPEPQ (manufactured by Clariant Japan Co., general formula (6)) was used as an additive D, Irgafos38.
(General formula (7) manufactured by Ciba Specialty Chemicals) was used.

[0039]

[Chemical 10]

[0040]

[Chemical 11]

[0041]

[Chemical 12] (In the formula, R ¹⁰ represents a tert-butyl group.)

[0042]

[Chemical 13]

[0043]

[Table 1]

[0044]

[Table 2]

[0045]

[Table 3]

[0046]

[Table 4]

[0047]

[Table 5]

[0048]

INDUSTRIAL APPLICABILITY The polyethylene composition of the present invention can be suitably used for the production of molded products such as films and sheets, has excellent continuous productivity, excellent recyclability, suppresses the generation of taste odor, and is fluid. It is possible to provide a polyethylene composition which has little change in properties, is excellent in discoloration resistance, is excellent in thermal stability such as suppressing generation of fish eyes and suppressing generation of eye blemishes, and is excellent in hydrolyzability. Furthermore, this polyethylene composition can be easily formed into a film, a sheet or the like to obtain a formed product.

[Brief description of drawings]

FIG. 1 is an example illustrating a relationship between a kneading time and a kneading torque when kneading extruded pellets with a Brabender.

Continued front page    (72) Inventor Tatsuo Goto             No. 8 Ube Ko, No. 8 Goi Minami Coast, Ichihara City, Chiba Prefecture             Sanba Co., Ltd. Chiba Petrochemical Factory (72) Inventor Yasuhiro Fukuda             No. 8 Ube Ko, No. 8 Goi Minami Coast, Ichihara City, Chiba Prefecture             Sanba Co., Ltd. Chiba Petrochemical Factory F term (reference) 4F071 AA15 AA82 AA88 AC10 AC15                       AE05 AF34 BB06 BC01 BC07                 4J002 BB051 BB151 EH128 EW066                       EW067 GG02

Claims (2)

[Claims] 1. A metallocene catalyst having the following characteristics (A):
Ethylene-α-olefin copolymer 50 produced by
100 parts by weight of polyethylene containing at least 100% by weight and the following general
0.01 to 0.5 part by weight of the component represented by the formula (1),
0.01 to 0.5 parts by weight of the component represented by the general formula (2)
And a component represented by the following general formula (3): 0.01 to 0.5
And a polyethylene composition. (A) Ethylene-α-olefin copolymer: (A-1) Density (d) is 0.88 to 0.96 (g / c
m³). (A-2) Melt at 190 ° C. and 2.16 kg load
Flow rate (MFR _2.16) Is 0.01 to 200 (g
/ 10 minutes). (A-3) Melt at 190 ° C. and 10.0 kg load
Flow rate (MFR _10.0) And 190 ℃, 2.16Kg
Melt flow rate under load (MFR_2.16) With
(MFR_10.0) / (MFR_2.16) Is 1 to 20. [Chemical 1] (In the formula, R¹Represents a hydrogen atom or a methyl group, R^TwoOver
And R^ThreeRepresents a tert-butyl group, R^FourIs the carbon number
1 to 30 alkyl groups are shown. ) [Chemical 2] (In the formula, R⁵And R⁶Represents a tert-butyl group
You ) [Chemical 3] (In the formula, R⁷And R⁸Represents a tert-butyl group,
R⁹Represents an alkyl group having 1 to 30 carbon atoms. ) 2. A molded product obtained by molding using the polyethylene composition according to claim 1.