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HDPE resin with high rheological property and use of HDPE resin in preparation of communication cable insulating material

A technology for communication cables and insulation materials, which is applied in the field of preparation of communication cable insulation materials and high-rheology HDPE resins, and can solve problems such as unfavorable communication cable processing, mechanical properties of insulation materials, and environmental pollution.

Inactive Publication Date: 2019-09-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Chinese patent CN1027328C discloses a communication cable insulating layer composition prepared by blending HDPE resin and LLDPE resin. Although the processing speed of the material is effectively improved, the environmental stress cracking resistance (ESCR) performance of the product is relatively poor.
Another example is the foam composition disclosed in the Chinese patent CN1024184C for the insulating layer of local telephone communication cables, which can achieve higher extrusion speed and good mechanical properties, but due to the addition of azodicarbonamide and diisoperoxide Propylbenzene is an additive that produces toxic and harmful substances after heating, causing certain pollution to the environment
In addition, the above insulating materials are prepared based on the blending of several resins with different indexes, which also causes a decrease in the tensile strength of the material.
Therefore, although the method of preparing insulating materials by blending various resins can improve the processing performance of the materials, the mechanical properties of the prepared insulating materials will be affected to varying degrees, which is not conducive to the processing of communication cables.
More importantly, the insulating material in the above-mentioned prior art solution is mainly used to prepare local communication cables. When it is used to prepare network data communication cables with thicker outer diameters and thicker walls, the production speed is still only 100%. It can reach the conventional level of 1200mm / min, but still cannot meet the processing requirements of communication cables

Method used

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  • HDPE resin with high rheological property and use of HDPE resin in preparation of communication cable insulating material
  • HDPE resin with high rheological property and use of HDPE resin in preparation of communication cable insulating material
  • HDPE resin with high rheological property and use of HDPE resin in preparation of communication cable insulating material

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0037] Take the silica gel carrier (the pore volume is 2.3-2.5ml / g) in a nitrogen atmosphere, and carry out drying treatment under the condition of 200 ° C; adopt the conventional solution impregnation method to carry out the loading of the silica gel after the above treatment with titanium tetrachloride, and control The loading temperature is 500°C, and the titanium loading amount of the silica gel carrier is adjusted by controlling the addition of titanium tetrachloride to obtain a titanium-modified silica gel carrier; take CrCl 3 Dissolved in ethanol to obtain a chromium salt solution, and mix the titanium-modified support with the chromium salt solution at a volume ratio of 1:5, and pre-dry at 100°C for 24 hours. By controlling the amount of chromium salt added Adjust the chromium loading of the silica gel carrier, dry the prepared powder at 300° C. for 24 hours in a nitrogen atmosphere, and roast the dried powder in a nitrogen atmosphere for 24 hours; Calcination and acti...

preparation example 2

[0043] Take the silica gel carrier (the pore volume is 2.3-2.5ml / g) in a nitrogen atmosphere, and carry out drying treatment under the condition of 150°C; adopt the conventional solution impregnation method to load the silica gel after the above treatment with titanium tetrachloride, and control The load temperature is 450°C, and the titanium loading amount of the silica gel carrier is adjusted by controlling the addition of titanium tetrachloride to obtain a titanium-modified silica gel carrier; take CrCl 3 Dissolved in water to prepare a chromium salt solution, and mix the titanium-modified carrier with the chromium salt solution at a volume ratio of 1:1, pre-dry at 120°C for 12 hours, and control the amount of chromium salt Adjust the chromium loading of the silica gel carrier, dry the prepared powder at 400° C. for 12 hours in a nitrogen atmosphere, and roast the dried powder in a nitrogen atmosphere for 12 hours; Calcination and activation in the air at ℃ to prepare a sup...

preparation example 3

[0048] Take the silica gel carrier (the pore volume is 2.3-2.5ml / g) in a nitrogen atmosphere, and carry out drying treatment under the condition of 300 ° C; use the conventional solution impregnation method to carry out the loading of the silica gel after the above treatment with titanium tetrachloride, and control The load temperature is 600°C, and the titanium loading amount of the silica gel carrier is adjusted by controlling the addition of titanium tetrachloride to obtain a titanium-modified silica gel carrier; take CrCl 3 Dissolved in acetone to obtain a chromium salt solution, and mix the titanium-modified carrier with the chromium salt solution at a volume ratio of 1:8, and pre-dry at 60°C for 36 hours. By controlling the amount of chromium salt added Adjust the chromium loading of the silica gel carrier, dry the prepared powder at 100° C. for 36 hours in a nitrogen atmosphere, and roast the dried powder in a nitrogen atmosphere for 36 hours; Calcination and activation...

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Abstract

The invention belongs to the technical field of resin processing, particularly relates to HDPE resin with high rheological property and further discloses use of the HDPE resin in preparation of a communication cable insulating material. According to the HDPE resin with high rheological property, a loaded titanium modified chromium catalyst is used for carrying out a catalyzed polymerization reaction on the basis of the existing conventional HDPE resin polymerization process, and thus, the prepared HDPE resin has extremely high rheological property and can be adaptable to high-speed extruding processing. According to the communication cable insulating material disclosed by the invention, the prepared HDPE resin with high rheological property is taken as a matrix material, a compounded santonox r antioxidant, a phosphite antioxidant and a hydrazine antioxidant are picked, have a good synergistic effect and can act excellent thermo-oxidative aging resisting and heavy metal passivation inhibiting functions, the prepared insulating material has a unique molecular structure, the speed of extrusion during communication cable processing can be increased, meanwhile, the comprehensive properties of the material are improved, and the improvement on use performance of communication cable products is also facilitated.

Description

technical field [0001] The invention belongs to the technical field of resin processing, specifically relates to a high-rheology HDPE resin, and further discloses its application for preparing communication cable insulating materials. Background technique [0002] With the increasing development of communication technology, communication cables are widely used in the transmission of telephone, telegraph, fax, television, network data and other electrical signals, and are currently one of the most widely used cable varieties. The communication cable is mainly composed of a metal wire and an outer insulating sheath layer, wherein the metal wire material is mainly copper wire, and the outer insulating sheath layer is mainly made of high-density polyethylene resin. The current communication cables are mainly used in the field of data lines. The outer diameter is usually about 1mm, and the thickness of the insulating layer is about 0.5mm. Due to the small thickness of the insulat...

Claims

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Application Information

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IPC IPC(8): C08F210/16C08F210/14C08L23/08C08K5/134C08K5/526C08K5/25C08K5/098C08K5/00
CPCC08F210/16C08K5/1345C08K5/526C08K5/25C08K5/098C08K5/00C08L2201/08C08L2203/202
Inventor 郭锐王群涛高凌雁苑东兴李延亮王日辉许平
Owner CHINA PETROLEUM & CHEM CORP
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