Crosslinkable polyethylene composition, crosslinked polyethylene, preparing method, product and application

A cross-linked polyethylene and composition technology, applied in the application of the cross-linked polyethylene in polymer welding, cross-linked polyethylene and its preparation, cross-linkable polyethylene composition field, can solve the problem of not being able to have both Welding, high impact resistance and other issues to achieve the effect of improving impact performance, improving impact performance, and improving impact resistance

Inactive Publication Date: 2017-02-01
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the defects that existing polyethylene materials cannot simultaneously possess weldability, high impact resistance, high rigidity and high environmental stress resistance, and provide a cross-linkable polyethylene composition and cross-linked polyethylene and its preparation Methods, articles and applications

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  • Crosslinkable polyethylene composition, crosslinked polyethylene, preparing method, product and application
  • Crosslinkable polyethylene composition, crosslinked polyethylene, preparing method, product and application

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preparation example Construction

[0046] The present invention also provides a preparation method of the cross-linked polyethylene of the present invention, comprising: mixing 100 parts by weight of polyethylene, 0.01-0.03 parts by weight of a cross-linking agent and 0.05-0.2 parts by weight of a cross-linking assistant It is a cross-linkable polyethylene composition, and then cross-linked by heating at 180-200°C for 10-20 minutes; wherein, the polyethylene includes 25-55 parts by weight of linear low-density polyethylene and 45-75 parts by weight of high-density polyethylene polyethylene.

[0047] Preferably, the linear low density polyethylene has a density of 0.91 to 0.925 g / cm 3 , the melt index is 1-5g / 10min; the density of the high-density polyethylene is 0.94-0.96g / cm 3 , The melt index is 5-10g / 10min.

[0048] Preferably, said high density polyethylene has a greater melt index than said linear low density polyethylene.

[0049] According to the present invention, preferably, the effective oxygen con...

Embodiment 1-2

[0075] This example illustrates the preparation of the crosslinked polyethylene of the present invention.

[0076] Feed materials according to the composition listed in Table 1, and stir with a high-speed mixer for 5 minutes until the mixture is uniform, and then melt, cross-link, blend and granulate through a low-shear twin-screw extruder to obtain cross-linked polyethylene. The screw aspect ratio of the twin-screw extruder is 18 / 1, the screw speed is 100rpm, the temperature of the twin-screw extruder is 180-200°C, and the material residence time is 10-20min.

[0077] The cross-linked polyethylene was measured, HTA, LTA, gel content, impact performance, flexural modulus, environmental stress, the results are shown in Table 1.

[0078] Table 1

[0079]

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Abstract

The invention relates to the field of crosslinked polyethylene, and discloses a crosslinkable polyethylene composition, crosslinked polyethylene, a preparing method, a product and an application. The composition comprises polyethylene, wherein the mass fraction of trichlorobenzene dissolving deposition of 90 DEG C of the composition is 49% to 83%; the composition is heated for 10 min to 20 min at the temperature of 180 DEG C to 200 DEG C and subjected to crosslinking, the content of gel of the obtained product is smaller than 20% in weight. By means of the crosslinkable polyethylene composition, the crosslinked polyethylene which is high in rigidity and capable of remarkably improving the impacting performance is obtained, and can be applied in polymer welding.

Description

technical field [0001] The invention relates to the field of cross-linked polyethylene, in particular to a cross-linked polyethylene composition, a cross-linked polyethylene and a preparation method thereof, and products containing the cross-linked polyethylene as components, and the cross-linked polyethylene The use of ethylene in polymer welding. The cross-linked polyethylene can be used to prepare polyethylene products with high impact resistance, high rigidity and high environmental stress resistance, and can obviously improve the welding performance of the cross-linked polyethylene. Background technique [0002] Polyethylene is one of the most important organic materials widely used in various fields. It can be processed into various shapes of products by molding methods such as extrusion molding, blow molding, injection molding, film molding, and rotational molding. However, pure polyethylene material cannot meet the requirements of high impact resistance, high rigidi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08K5/14C08J3/24
CPCC08L23/0815C08J3/246C08J2323/08C08J2423/06C08L2207/062
Inventor 陈学连梁文斌赖世燿
Owner CHNA ENERGY INVESTMENT CORP LTD
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