High temperature resistant PVC profile outer cover used in base station antenna and preparation method thereof

A technology of base station antennas and profiled materials, which is applied in the direction of the radiation unit cover, etc., can solve the problems that the ultraviolet resistance performance cannot meet the use conditions of the base station antenna, cannot reliably meet the long-term use requirements in high temperature areas, and cannot handle defective products, etc., to achieve ultraviolet resistance Good light performance, good impact toughness, good dimensional stability

Inactive Publication Date: 2010-01-27
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally, manufacturers use ABS, ASA or FRP materials to make antenna cover products. Among them, ABS, ASA and other polymer materials have poor processing performance and high cost when making extruded profile cover products due to their inherent physical properties. Low, poor quality stability during extrusion processing; and FRP materials are inefficient when making such products, the cost of raw materials is high, and because they cannot be reused, they will pollute the environment, and the defective products produced are in an embarrassing situation that cannot be processed
Polyvinyl chloride (PVC) material is widely used in all walks of life because of its low cost, easy processing, and wide range of material sources, especially in the extrusion molding industry, especially in recent years with the development of PVC modification technology , which greatly expands the application field of this material, but the dielectric properties and UV resistance of commonly used PVC materials still cannot meet the use conditions of base station antennas, and general modified PVC can only improve its mechanical strength and processing performance, so There is an urgent need to develop an optimized and improved PVC material, which can meet the requirements of low dielectric constant, low dielectric loss, UV resistance, environmental protection and low cost while meeting various mechanical performances.
The applicant has developed the anti-aging and anti-ultraviolet PVC material that has good high and low temperature aging resistance and can be used normally in the range of -40 to +70 degrees. In some regions and some special regions, the local ambient temperature may exceed 70°C, so that the current material properties cannot reliably meet the long-term use requirements in high-temperature regions.

Method used

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  • High temperature resistant PVC profile outer cover used in base station antenna and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Raw material formula: 100 parts of PVC, 10 parts of rutile titanium dioxide, 5 parts of calcium carbonate, 1.5 parts of organic tin stabilizer dibutyltin dilaurate, 1.0 parts of calcium stearate, 0.6 parts of paraffin, 0.3 parts of stearic acid, chlorinated polyethylene 6 parts, 2 parts of acrylate processing aids, 36 parts of heat-resistant modified resin, wherein the heat-resistant modified resin is α-methylstyrene-acrylonitrile (70 / 30) copolymer with a mass content of 70% butadiene % of the emulsion blend of ABS resin, wherein the amount of ABS resin is 8% of the quality of the emulsion blend.

[0037] Preparation:

[0038]High-speed powder mixing: Put PVC resin, heat-resistant modified resin, calcium stearate, and organic tin stabilizer into the high-speed mixer. When the temperature rises to 80°C, add acrylate impact modifiers, processing aids and For other additives, when the temperature rises to 92°C, add inorganic modified fillers such as rutile titanium dioxid...

Embodiment 2

[0041] Raw material formula: 100 parts of PVC, 5 parts of rutile titanium dioxide, 5 parts of mica, 1.5 parts of organic tin stabilizer dibutyltin dilaurate, 1.3 parts of calcium stearate, 0.2 parts of zinc stearate, 1.0 parts of polyethylene wax, acrylate 6 parts of impact modifier, 2 parts of acrylate processing aid, 30 parts of α-methylstyrene / acrylonitrile copolymer, wherein α-methylstyrene / acrylonitrile=60 / 40.

[0042] Preparation:

[0043] High-speed powder mixing: put PVC resin, calcium stearate, zinc stearate, and organotin stabilizer into the high-speed mixer, and when the temperature rises to 85°C, add acrylate impact modifiers, processing aids and other Additives, when the temperature rises to 95°C, add inorganic modified fillers such as rutile titanium dioxide, mica and α-methylstyrene / acrylonitrile copolymer; when the temperature continues to rise to 120°C, quickly discharge to another In a jacketed water-cooled mixer, the mixture continues to mix in the jacketed...

Embodiment 3

[0046] Raw material formula: 100 parts of PVC, 10 parts of rutile titanium dioxide, 5 parts of calcium carbonate, 1 part of organic tin stabilizer di-n-octyltin dilaurate, 1.0 part of calcium stearate, 0.3 parts of barium stearate, 0.2 parts of zinc stearate 1.5 parts of calcium stearate, 0.5 parts of polyethylene wax, 0.3 parts of paraffin wax, 0.2 parts of stearic acid, 6 parts of acrylate impact modifier, 1.5 parts of acrylate processing aid, benzophenone UV absorber 10.3 parts of UV-53, 55 parts of ABS resin, wherein the composition mass ratio of ABS is acrylonitrile / butadiene / styrene=20 / 15 / 65.

[0047] Preparation:

[0048] High-speed powder mixing: put PVC resin, calcium stearate, and organic tin stabilizer into the high-speed mixer, and when the temperature rises to 83°C, add acrylate impact modifiers, processing aids and other additives, and the temperature rises to 83°C. When the temperature reaches 90°C, add inorganic modified fillers such as rutile titanium dioxide...

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Abstract

The invention discloses a high temperature resistant PVC profile outer cover used in a base station antenna and a preparation method thereof, which can not only improve the mechanical property, but also greatly improve high and low temperature resistant ageing property and ultraviolet ray resistant property, and greatly improve the electrical property of the material simultaneously, and what's more, the resisted high temperature can reach 90 DEG C. The outer cover of the invention is manufactured by the following raw materials according to the mass ratio: 100 parts of PVC, 30-100 parts of heat resistant modified resin, 4-10 parts of inorganic modified padding, 0-10 parts of calcium carbonate, 1-2 parts of organic stannum stabilizing agent; 1-2 parts of metal soap stabilizing agent, 0.5-1.5 parts of lubricating agent, 4-12 parts of impact modifier, 1-3 parts of acrylic ester processing agent and 0-0.6 part of light stabilizer, wherein, the heat resistant modified resin is one or two or the emulsion blend of ABS resin and alpha-methyl styrene-acrylonitrile copolymer; the inorganic padding is one of titanium dioxide and mica or the mixture of the two.

Description

technical field [0001] The invention relates to a special-shaped material outer cover and a preparation method thereof, and more specifically relates to a high-temperature-resistant PVC special-shaped material outer cover for a base station antenna and a preparation method thereof. Background technique [0002] With the rapid development of the mobile communication industry, the base station antenna industry for communication has also obtained great opportunities for development. Each communication station and antenna must use a large number of plastic products, among which antenna cover products are typical representatives. Since the microwave communication antenna is placed outdoors for a long time, it is not only required that the outer cover has a low dielectric constant and dielectric loss to meet the reliable transmission of communication signals, but also must have excellent high and low temperature aging resistance and anti-ultraviolet radiation function to meet the n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/42C08L27/06C08L23/28C08L33/04C08K13/06C08K3/22C08K3/34
Inventor 张军陈双俊张振陈浩周国辉徐国忠陆跃忠
Owner NANJING UNIV OF TECH
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