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Crosslinkable polyethylene composition and application thereof, crosslinked polyethylene and preparation method and application thereof

A cross-linked polyethylene and composition technology, applied in the field of polyolefins, can solve the problems of high odor, reduce the odor of cross-linked polyethylene, and low impact performance, and achieve the effects of low odor, excellent mechanical properties, and increased cross-linking degree

Pending Publication Date: 2022-07-12
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a cross-linkable polyethylene composition to overcome the problems in the prior art that the preparation of cross-linked polyethylene has a large odor and high-temperature creep resistance, cross-linking degree and notched impact performance at minus 20°C And its application, cross-linked polyethylene and its preparation method and application, the cross-linkable polyethylene composition comprises peroxide cross-linking agent and auxiliary cross-linking agent shown in formula I, thus can significantly improve the resistance of the composition High-temperature creep performance, cross-linking degree and notched impact performance at minus 20°C, and significantly reduce the odor of cross-linked polyethylene products made from the composition

Method used

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  • Crosslinkable polyethylene composition and application thereof, crosslinked polyethylene and preparation method and application thereof
  • Crosslinkable polyethylene composition and application thereof, crosslinked polyethylene and preparation method and application thereof
  • Crosslinkable polyethylene composition and application thereof, crosslinked polyethylene and preparation method and application thereof

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preparation example Construction

[0042] A second aspect of the present invention provides a method for preparing cross-linked polyethylene, characterized in that the method comprises the following steps:

[0043] S1. After mixing the cross-linkable polyethylene composition, melt extrusion processing through a twin-screw extruder to obtain the cross-linkable polyethylene composition A;

[0044] S2, heat-pressing the cross-linkable polyethylene composition A and cooling to room temperature to obtain cross-linked polyethylene;

[0045] Wherein, the cross-linkable polyethylene composition is the above-mentioned cross-linkable polyethylene composition.

[0046] According to the present invention, in step (1), the melt extrusion conditions include: extrusion temperature of 80-150° C., preferably 110-140° C.; rotational speed of 10-200 r / min, preferably 50-120 r / min.

[0047] According to the present invention, in step (2), the conditions for hot pressing include: the hot pressing temperature is 160-220°C, preferab...

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Abstract

The invention relates to the field of polyolefin, and discloses a crosslinkable polyethylene composition and application thereof, crosslinked polyethylene and a preparation method and application thereof. The composition comprises polyethylene, a peroxide cross-linking agent and an assistant cross-linking agent, relative to 100 parts by weight of polyethylene, the dosage of the peroxide cross-linking agent is 0.05-2 parts by weight; the use amount of the assistant crosslinking agent is 0.05-2 parts by weight; the assistant crosslinker has a structure as shown in a formula I, wherein Rn1R2 (6-n) Si2O is shown in the formula I; wherein in the formula I, R1 is alkenyl of C2-C5, R2 is methyl, ethyl, methoxyl or ethoxyl, and n is an integer of 1-6. The composition has high high-temperature creep resistance, crosslinking degree and-20 DEG C notch impact property, and the odor of a crosslinked polyethylene product prepared from the composition is remarkably reduced.

Description

technical field [0001] The invention relates to the field of polyolefins, in particular to a cross-linkable polyethylene composition and application thereof, cross-linked polyethylene and a preparation method and application thereof. Background technique [0002] Compared with non-crosslinked polyethylene, crosslinked polyethylene has excellent mechanical properties, environmental cracking resistance and high temperature creep resistance, which is mainly due to the transformation of linear thermoplastic polyethylene macromolecular chains into Reticulated thermoset macromolecular material. The performance of cross-linked polyethylene products is not only related to the structure and molding process of polyethylene, but also the degree of cross-linking is the main factor affecting the performance of cross-linked polyethylene products. The higher the degree of cross-linking of cross-linked polyethylene, the more perfect the cross-linked network is, and the better the performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K5/14C08K5/5425C08J3/24
CPCC08K5/14C08K5/5425C08J3/24C08L2312/08C08J2323/06C08L2207/062C08L2201/08C08L23/06Y02E10/50
Inventor 任月庆孙小杰李亚飞孙苗苗陈兰兰王荣
Owner CHNA ENERGY INVESTMENT CORP LTD
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