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Polyethylene resin, catalyst used for production of the same, method for producing the same, hollow plastic molded article containing polyethylene resin, and use of the hollow plastic molded article

一种聚乙烯系树脂、制造方法的技术，应用在薄料处理、运输和包装等方向，能够解决没有任何教导、未作公开等问题，达到耐冲击性与刚性优异、耐久性优异、屏蔽性优异的效果

Active Publication Date: 2015-01-21
JAPAN POLYETHYLENE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this gazette does not teach nor disclose polyethylene suitable for use in hollow plastic moldings, especially fuel tanks for automobiles.

Method used

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  • Polyethylene resin, catalyst used for production of the same, method for producing the same, hollow plastic molded article containing polyethylene resin, and use of the hollow plastic molded article
  • Polyethylene resin, catalyst used for production of the same, method for producing the same, hollow plastic molded article containing polyethylene resin, and use of the hollow plastic molded article
  • Polyethylene resin, catalyst used for production of the same, method for producing the same, hollow plastic molded article containing polyethylene resin, and use of the hollow plastic molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0318] Hereinafter, the present invention will be described in further detail by citing examples and comparative examples. Although the excellence of the present invention and the superiority in the constitution of the present invention have been confirmed, the present invention is not limited to these examples.

[0319] (1) Various measurement methods

[0320] The measurement methods used in Examples and Comparative Examples are as follows.

[0321] 1. Quantification of the hydrogen concentration and ethylene concentration in the liquid phase in the autoclave

[0322] In accordance with JIS K-2301 (2004 edition), the polymerization temperature, hydrogen partial pressure, hydrogen concentration under ethylene partial pressure, and ethylene concentration under the conditions of each example and comparative example were analyzed in advance by gas chromatography without introducing a catalyst. And quantify. A small amount of the solution in the autoclave was extracted to vapori...

reference example 1-2

[0427] Instead of the tri-n-butylaluminum solution, add 4.2ml (Al / Cr molar ratio = 1) of a 0.1mol / L-hexane solution of triethylaluminum manufactured by Tosoh Finechem Corporation, and everything is the same as Reference Example 1-1 A chromium catalyst loaded with a trialkylaluminum compound is carefully prepared and polymerized. The polymerization activity was 3700 g-polymer / g-catalyst / h. The physical property measurement results are shown in Tables 1 and 2.

reference example 1-3

[0429] Instead of the tri-n-butylaluminum solution, add 4.2 ml (Al / Cr molar ratio = 1) of a 0.1 mol / L-hexane solution of triisobutylaluminum manufactured by Tosoh Finechem Corporation, and everything else is the same as Reference Example 1-1 Similarly, a chromium catalyst carrying a trialkylaluminum compound was prepared and polymerized. The polymerization activity was 4000 g-polymer / g-catalyst / h. The physical property measurement results are shown in Tables 1 and 2.

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Abstract

A polyethylene based resin exhibiting excellent moldability and durability and having an excellent balance between impact resistance and stiffness; and a hollow plastic molded article using the foregoing resin, which exhibits excellent moldability, durability and barrier properties and has an excellent balance between impact resistance and stiffness, are provided. The polyethylene based resin satisfies the following requirements (1) to (4): (1) a high-load melt flow rate (HLMFR) is from 1 to 100 g / 10 min; (2) a density is from 0.940 to 0.960 g / cm 3 ; (3) a strain hardening parameter »max of elongational viscosity is from 1.05 to 1.50; and (4) a rupture time in a full notch tensile creep test and a density satisfy the following relational expression (A): log (rupture time) ‰¥ -355 × (density) + 337.6 (A).

Description

technical field [0001] The present invention relates to polyethylene-based resins, catalysts and methods for producing polyethylene-based resins, hollow plastic molded articles containing polyethylene-based resins, and uses thereof. Polyethylene-based resins that satisfy the specified requirements, are excellent in formability and durability, and have an excellent balance between impact resistance and rigidity, and those that have excellent formability, durability, and shielding properties, and an excellent balance between impact resistance and rigidity include A hollow plastic molded product of the above resin. [0002] Furthermore, the present invention relates to a hollow plastic molded article that is excellent in moldability and durability, has an excellent balance between impact resistance and rigidity, and has excellent shielding properties, and specifically manufactures boxes, cans, containers, bottles, etc., especially fuel tanks for automobiles, etc. The use of holl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/69B32B1/00
CPCC08F10/00C08F110/02C08F210/16Y10T428/1397C08F10/02C08F4/44C08F2500/12C08F4/54C08F4/52C08F2500/04C08F4/69C08F2500/17C08F2500/07
Inventor 葛叶悠一物井尚志松本律哉小川浩一金泽聪服部高明
Owner JAPAN POLYETHYLENE CORP