Hot-melting type filling paste for electric cable and preparation method thereof

A hot-melt type filling paste technology, applied in the direction of insulating cables, cables, circuits, etc., can solve the problems of cable strong humidity, cable transmission characteristics, insulation damage, etc., and achieve good compatibility, excellent colloidal stability and oxidation resistance The effect of stability and low acid value

Active Publication Date: 2012-04-11
SHANGHAI HONGHUI OPTICS COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This often leads to an undirected diffusion of moisture from the outside of the cable to the inside, which eventually leads to a higher level of humidity inside the cable, especially in conditions where the plastic sheath acts as the only barrier against moisture ingress
High humidity inside the cable sheath will greatly damage the transmission characteristics and insulation of the cable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 40 grams of EPDM rubber to 356 grams of naphthenic rubber oil, heat and stir for 3 to 5 hours, stop heating when the temperature rises to 200 ° C, keep stirring for 1 to 3 hours, and wait for the EPDM After the propylene rubber is completely melted in the naphthenic rubber oil, add 350 grams of polyisobutylene, and the temperature is controlled at 130 ° C ~ 170 ° C; after fully stirring for 1 to 3 hours, add 250 grams of refined polyethylene wax, and then keep warm (150 ± 10 ℃) after stirring for 1 to 3 hours, add 4 grams of high-temperature antioxidant, and then fully feed back and stir for 0.5 to 1 hour, then filter and cool to normal temperature, and the final product obtained is a white semi-solid.

[0021] Among the above-mentioned raw materials, the high-temperature antioxidant is selected from Ciba Specialty Chemicals (China) Co., Ltd., the product model is B225, and other raw materials are all commercially available products.

[0022] The main indicators of ...

Embodiment 2

[0024] Add 45 grams of EPDM rubber to 340 grams of hydrogenated white oil, heat and stir for 3 to 5 hours, when the temperature rises to 200 ° C, stop heating, keep stirring for 1 to 3 hours, and wait for the EPDM After the rubber is completely melted in the hydrogenated white oil, add 360 grams of polybutene, and the temperature is controlled at 130 ° C ~ 170 ° C; after fully stirring for 1 to 3 hours, add 250 grams of refined polyethylene wax, and then keep warm (150 ± 10 ° C ) after stirring for 1 to 3 hours, add 5 grams of high-temperature antioxidant, and then fully feed back and stir for 0.5 to 1 hour, then filter and cool to normal temperature, and the final product obtained is a white semi-solid.

[0025] Among the above-mentioned raw materials, the high-temperature antioxidant is the same as in Example 1, and the other raw materials are all commercially available products.

[0026] The main indicators of the final product after testing are: appearance (white semi-soli...

Embodiment 3

[0028] Add 50 grams of EPDM rubber to 350 grams of naphthenic rubber oil, heat and stir for 3 to 5 hours, stop heating when the temperature rises to 200 ° C, keep stirring for 1 to 3 hours, and wait for the EPDM After the propylene rubber is completely melted in the naphthenic rubber oil, add 340 grams of polybutene, and the temperature is controlled at 130 ° C ~ 170 ° C; after fully stirring for 1 to 3 hours, add 255 grams of refined polyethylene wax, and then keep warm (150 ± 10° C.) after stirring for 1 to 3 hours, add 5 grams of high-temperature antioxidant, and then fully feed back and stir for 0.5 to 1 hour, then filter and cool to normal temperature, and the final product obtained is a white semi-solid.

[0029] Among the above-mentioned raw materials, the high-temperature antioxidant is the same as in Example 1, and the other raw materials are all commercially available products.

[0030] The main indicators of the final product after testing are: appearance (white sem...

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Abstract

The invention relates to hot-melting type filling paste for an electric cable, which mainly comprises base oil, insulation paste, an oil separation inhibitor, a thickening agent and an antioxidant. The invention further provides a preparation method of the hot-melting type filling paste. The hot-melting type filling paste for the electric cable provided by the invention has the main characteristics of excellent colloidal stability and oxidation stability, heat resistance, weather resistance, no oil separation in systems, small acid value, strong water resistance, no emulsification, excellent high / low temperature performance, and extremely-excellent electrical properties and dielectric properties; the hot-melting type filling paste is mainly applicable to filling air gaps in a cable core of a multi-conductor wire cable, or gaps among electric cable members of an any structure by heating, so as to prevent water or other fluid from flowing or migrating into the electric cable and provideexcellent functions in insulation, waterproofing, dampproofing, buffering and the like for the electric cable.

Description

technical field [0001] The invention relates to a filling paste for cables and a preparation method thereof, in particular to a hot-melt filling paste for cables and a preparation method thereof. Background technique [0002] It is well known that changes in the ambient environment in a cable run can create an air pressure difference between the inside and outside of the plastic sheath. This often leads to an undirected diffusion of moisture from the outside of the cable to the inside, which eventually leads to a higher level of humidity inside the cable, especially in conditions where the plastic sheath is the only barrier against moisture ingress. The high humidity inside the cable sheath will greatly damage the transmission characteristics and insulation of the cable. [0003] Therefore develop a kind of filling in the air gap in the multi-conductor wire and cable cable core or the gap between the cable elements of any structure, prevent moisture and moisture from enteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/20C08L23/16C08L91/00C08L23/06H01B7/285
Inventor 沈江波
Owner SHANGHAI HONGHUI OPTICS COMM TECH
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