Ethylene/alpha-alefin copolymer, composition thereof, film thereof and uses of these

An olefin copolymer and copolymerization technology, applied in thin material processing, synthetic resin layered products, plastic/resin/wax insulators, etc., can solve the problems of insufficient bonding strength and heat resistance, and achieve excellent mechanical strength , the effect of excellent productivity and excellent formability

Inactive Publication Date: 2001-07-25
JAPAN POLYOLEFINS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these modified LLDPEs have disadvantages such as insufficient adhesive strength and heat resistance.

Method used

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  • Ethylene/alpha-alefin copolymer, composition thereof, film thereof and uses of these
  • Ethylene/alpha-alefin copolymer, composition thereof, film thereof and uses of these
  • Ethylene/alpha-alefin copolymer, composition thereof, film thereof and uses of these

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0267] [Preparation of solid catalyst]

[0268] Add 1000ml of toluene purified under nitrogen, 22g of tetraethoxyzirconium and 74g of indene to the catalyst preparation device equipped with an electromagnetic stirrer, and add 100g of tripropylaluminum dropwise for 10 minutes while maintaining the temperature at 90°C , and then reacted at the same temperature for 2 hours. After cooling to 40° C., 3,200 ml of a toluene solution of methyl alumoxane (concentration: 2.5 mmol / ml) was added and stirred for 2 hours. Then add 2000 g of silicon dioxide (manufactured by クレ-ス company, #952, with a surface area of ​​300 m) at 450 ° C for 5 hours in advance. 2 / g), after stirring at room temperature for 1 hour, nitrogen filling and drying under reduced pressure were carried out at 40° C. to obtain a solid catalyst with good fluidity.

[0269] [gas phase polymerization]

[0270] Using a continuous fluidized bed gas phase polymerization device, at a polymerization temperature of 80°C, 20kg...

Embodiment 6-10

[0289] [Inflation film forming method]

[0290] Prepare the ethylene copolymer obtained by the gas-phase polymerization method of Examples 1-5 and low-density polyethylene obtained by a commercially available high-pressure method as other polyolefins (name: Gerex LD F31N, manufactured by Nippon Polyolefin Co., Ltd.), and The compounding ratios shown in Table 4 were mixed with a Henschel mixer for 5 minutes, then kneaded with a 40 mmφ extruder, and pelletized to obtain an ethylene·α-ethylene copolymer composition.

[0291] Using the obtained ethylene·α-ethylene copolymer composition, install a 100mmφ, 2mm die cap mold on a 50mmφ LLDPE film forming machine with a blowing ratio of 1.9, a pulling speed of 20m / min, and a molding temperature of 200 Form a film of 30 μm under the forming conditions of ℃. The obtained films were subjected to various evaluations. The results are shown in Table 4.

[0292] Example

Embodiment 11

[0294]Example 6 was carried out in the same manner as in Example 6 except that a commercially available linear low-density polyethylene (name: Jerex LL A807F, manufactured by Nippon Polyolefin Co., Ltd.) obtained by a Ziegler-based catalyst was used as another polyolefin. The results are shown in Table 5.

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Abstract

The present invention relates to an ethylene-alpha-olefin copolymer; a composition thereof; a film thereof; a polar group-containing resin material; and productions and use of the ethylene-alpha-olefin copolymer. The ethylene-alpha-olefin copolymer of the present invention is characterized in satisfying the following conditions (A) to (E): (A) a density in the range of 0.92 to 0.96 g / cm3; (B) a melt flow rate (MFR) in the range of 0.01 to 200 g / 10 min; (C) a molecular weight distribution (Mw / Mn) in the range of 1.5 to 5.0; (D) possessing only one peak in terms of the number of peaks observed in an elution temperature-eluted amount curve as measured by the continuous temperature raising elution fractionation (TREF) method, from the integrated elution curve obtained by the elution temperature-eluted amount curve, the difference T75-T25 in the temperature and density d respectively satisfy a specific relationship, wherein T25 is the temperature where 25% of the total elution is obtained, and T75 is the temperature where 75% of the total elution is obtained; and (E) possessing one or two melting point peaks, and among these the highest melting point Tm1 and the density d satisfy a specific relationship. Accordingly, this ethylene-alpha-olefin copolymer exhibits a superior thermal resistance, heat sealability, and processability.

Description

technical field [0001] The present invention relates to an ethylene·α-olefin copolymer having excellent physical properties and processability, its composition and its film, a polar group-containing resin material, products and applications using the ethylene·α-olefin copolymer. More specifically, it provides various packaging films produced by T-molding method, inflation film method, etc.; film molded products such as original sheets for laminated products; hollow molding of various containers, etc. produced by hollow molding method Products; injection molded products of various containers, caps, storage containers, etc. manufactured by injection molding; or ethylene-α-olefin copolymers suitable for covering wires, cables, steel pipes, etc., their compositions and Its thin film, resin material containing polar groups. This invention is based on Japanese patent applications (Japanese Patent Application No. 10-173594, Japanese Patent Application No. 10-197879, Japanese Patent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/649C08F4/659C08F10/00C08F210/02C08F210/14C08L23/04C08L23/08H01B3/44
CPCY10T428/31855C08F10/00C08F4/65916Y10T428/31913H01B3/441C08L23/04C08F210/02C08L23/0815Y10T428/31902C08F4/65912Y10T428/31938Y10T428/31895Y10T428/1386C08L2314/06C08F210/14C08F4/65904C08F4/651C08L2666/04C08F236/06C08F210/16
Inventor 江头俊昭樋口礼司坂本和幸三好公弥若山昌弘山口辰夫浅田文男三轮伸二平城贤一池田雅昭清水良美
Owner JAPAN POLYOLEFINS CO LTD
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