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Ethylene-based polymer, polyethylene resin composition and use thereof, catalyst ingredient for olefin polymerization, catalyst for olefin polymerization containing said ingredient, and process for producing ethylene-based polymer using said catalyst

A resin composition, polyethylene-based technology, used in molded products and films, production of olefin-based polymers, new polyethylene-based resin composition field, can solve the problem of short branch length, can not show elongation viscosity strain hardening, Problems such as less double keys

Active Publication Date: 2014-02-12
JAPAN POLYETHYLENE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the branch length is too short to exert the effect of improving the moldability as a long-chain branch, and strain hardening (strain hardening) of elongational viscosity cannot be exhibited.
[0014] In addition, Patent Document 22 has reported the polymerization of propylene by means of a polymerization catalyst prepared by combining an asymmetric metallocene compound in which cyclopentadienyl and indenyl bridges each having a specific substituent and methylaluminoxane, but this The literature does not mention the possibility of generating long chain branches when the above polymerization is applied to the polymerization of ethylene, and the effect of improving molding processability cannot be expected
[0015] In addition, Patent Document 23 has reported that it is possible to modify the catalyst system for the production of ethylene polymers and ethylene / butene copolymers used as macromonomers, but the number of terminal double bonds in the polymers is small, and the document is limited to long-chain branches generated by this catalyst only possibility not mentioned

Method used

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  • Ethylene-based polymer, polyethylene resin composition and use thereof, catalyst ingredient for olefin polymerization, catalyst for olefin polymerization containing said ingredient, and process for producing ethylene-based polymer using said catalyst
  • Ethylene-based polymer, polyethylene resin composition and use thereof, catalyst ingredient for olefin polymerization, catalyst for olefin polymerization containing said ingredient, and process for producing ethylene-based polymer using said catalyst
  • Ethylene-based polymer, polyethylene resin composition and use thereof, catalyst ingredient for olefin polymerization, catalyst for olefin polymerization containing said ingredient, and process for producing ethylene-based polymer using said catalyst

Examples

Experimental program
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preparation example Construction

[0137] Preparation of samples: A solution of 1 mg / mL of sample was prepared using ODCB (containing 0.5 mg / mL of BHT) and dissolved at 140°C over approximately 1 hour.

[0138] Incidentally, for example, as figure 1 Baselines and intervals of chromatograms obtained from the assays indicated.

[0139] 1-4. Conditions (A-4)

[0140] The component (A) in the present invention satisfies the following conditions: elongation viscosity η(t) (unit: Pa·sec) and elongation time measured at a temperature of 170° C. and an elongation strain rate of 2 (unit: 1 / sec) In a double logarithmic plot of t (unit: seconds), no inflection point of elongational viscosity attributable to strain hardening is observed or when inflection point is observed, the maximum elongational viscosity after strain hardening is assumed to be η Max (t 1 ) and the approximate straight line of the elongation viscosity before hardening is η Linear (t), then by η Max (t 1 ) / η Linear (t 1 ) defined by the degree o...

Embodiment 1a

[0950] (1) Production of vinyl polymer (A-1)

[0951] [Preparation of Metallocene Catalyst A-1]

[0952] In a catalyst preparation apparatus equipped with an electromagnetic induction stirrer, under nitrogen flow, 1,000 ml of pure toluene, 22 g of zirconium tetraethoxide (Zr(OEt) 4 ), 75 g of indene, and 88 g of methylbutylcyclopentadiene while keeping the system at 90° C., 100 g of tripropylaluminum was added dropwise over 100 minutes, and then reacted at the same temperature for 2 hours. The reaction product was cooled to 40°C, after which 3,200 ml of a toluene solution of methylaluminoxane (concentration: 2.5 mmol / ml) was added. After stirring for 2 hours, 2,000 g of silica (#952, produced by Grace, surface area: 300 m 2 / g) previously subjected to calcination treatment at 450° C. for 5 hours was added and stirred at room temperature for 1 hour. After that, nitrogen blowing at 40° C. and drying under reduced pressure were performed to obtain a solid catalyst A-1 with good...

Embodiment 2a

[0975] Except in Example 1a(c), a commercially available ethylene-based polymer (A-2) (UF230, produced by Japan Polyethylene Corporation) produced using a magnesium-titanium composite Ziegler catalyst (A-2) was used ; MFR=1.0g / 10min, density: 0.921g / cm 3 , ethylene·1-butene copolymer) was replaced with the ethylene-based polymer (A-1) produced by the metallocene catalyst, in the same manner as in Example 1a(c) to carry out the polyethylene-based resin composition 2. Production and film forming. The results obtained are shown in Table 1a-1 and Table 1a-2.

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Abstract

The purpose of the present invention is to provide: a polyethylene resin composition which has excellent moldability and from which molded objects that are excellent in terms of balance between impact strength and rigidity and of transparency can be produced; and a molded object and a film which are obtained by molding the polyethylene resin composition. This polyethylene resin composition comprises 41-99 wt.% ethylene-based polymer (A) which satisfies specific requirements and 1-59 wt.% ethylene-based polymer (B) which satisfies specific requirements, the composition as a whole having an MFR of 0.05-50 g / 10 min and a density of 0.910-0.960 g / cm3.

Description

technical field [0001] The present invention relates to an ethylene-based polymer having a developed long-chain branched structure and excellent moldability. As a further aspect of the present invention, the present invention relates to a novel polyethylene-based resin composition and use thereof. More specifically, the present invention relates to a polyethylene-based resin composition excellent in moldability and capable of producing a molded article having a balance between impact strength and rigidity and excellent transparency, and injection molding, compression injection by the polyethylene-based resin composition Shaped articles and films obtained by molding, rotational molding, extrusion molding, blow molding, or blow molding, respectively. Furthermore, the present invention relates to a catalyst component for olefin polymerization containing a specific metallocene compound, a catalyst for olefin polymerization containing the component, and a method for producing an o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08F4/6592C08F10/02
CPCC08L23/0815C08J5/18C08F4/65916C08F4/65908C08F10/02C08F4/65912C08F4/65927C08F210/16C08J2323/08C08L2203/16C08L2205/025C08L2314/02C08L2314/06C08F210/14C08F2500/04C08F2500/11C08F2500/12C08F2500/17C08F2500/26C08F210/08
Inventor 石滨由之浅川亮介樱木努福田哲朗坂田和也青木胜河岸健二吉本圭一
Owner JAPAN POLYETHYLENE CORP
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