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Semiconductive cable filling paste and preparation method thereof
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A cable filling and semi-conductive technology, used in the petroleum industry, lubricating compositions, etc., can solve the problems of difficult to meet the high temperature and conductive use requirements of overhead wires, affecting the service life of the wire, and reducing the protective effect of the wire.
Active Publication Date: 2021-09-10
SHANGHAI HONGHUI OPTICS COMM TECH
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However, this kind of overhead wire is easy to cause the temperature of the wire to rise rapidly to a high level due to excessive current or short circuit. In this case, the filling paste prepared according to the current technology has a large amount of oil separation and poor high-temperature performance, which will result in filling. The protective effect of the paste on the wires drops sharply, which in turn affects the overall service life of the wires and even causes a fire
[0004]It is difficult for the products currently on the market to meet the high temperature and conductive requirements of overhead wires. Requirements are respectively stipulated as follows: 1. Short-term high-temperature stability. The test requirements stipulate that the temperature is divided into three grades: 120°C, 180°C, and 280°C; the test time is 1h. More than 0.2% of the sample weight; 2. Long-term high temperature stability, the test requirements stipulate that the temperature is divided into three grades: 120°C, 180°C, and 280°C; the test time is 90d, and the oil will separate under these three temperature environments and time conditions It should not exceed 1.5% of the sample weight; 3. The volume resistivity of the filling paste should be ≦1.0×106Ω.cm in an environment of 23°C
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[0036] The preparation method of semiconductive cable filling paste of the present invention comprises the following steps:
[0037] (1) Prepare raw materials according to the following components and mass percentages,
[0038]
[0039] The sum of the mass percentages of the above components is 100%;
[0040] (2) Put all the base oil into the fat-making kettle, then add the oil separation inhibitor, and turn on the stirrer and the heating device, stir while heating, when the temperature rises to 160±20°C, keep stirring for 3-5 hours, until the oil separation inhibitor is completely dissolved in the base oil, then add the antioxidant, and continue to stir for 0.5 to 1 hour;
[0041] (3) Put the cooled masterbatch into the reaction kettle, then add the bentonite thickener (pour it into the kettle once, it is easy to agglomerate, and it is not easy to disperse uniformly) into the masterbatch, start the reactor agitator to make it mix evenly , until the organic bentonite is c...
Embodiment 1
[0054] (1) Pump all the measured base oil of 764 grams into the fat-making kettle, then add 40 grams of oil separation inhibitor, and start the stirrer and heating device, stir while heating, when the temperature rises to 160 ° C , keep stirring for 3 hours, until the oil separation inhibitor is completely dissolved in the base oil, then add 6 grams of high-temperature composite antioxidant, and continue stirring for 0.5 hours;
[0055] (2) Pump the cooled masterbatch into the reaction kettle, then add 90 grams of organic bentonite thickener into the masterbatch, start the reactor agitator to mix it evenly, until the organic bentonite is completely wetted (about 10 to 15 minutes), then add 10 grams of polar auxiliary dispersant, and continue to mix and stir evenly for more than 30 minutes, until the contents of the kettle form a grease structure.
[0058] (1) Pump all the measured 752 grams of base oil into the fat-making kettle, then add 45 grams of oil separation inhibitor, and start the stirrer and heating device, stir while heating, and wait until the temperature rises to 160 ° C , keep stirring for 3.5 hours, until the oil separation inhibitor is completely dissolved in the base oil, then add 6 grams of high-temperature composite antioxidant, and continue stirring for 1 hour; then take out the kettle and cool it into a masterbatch for later use;
[0059] (2) Pump the cooled masterbatch into the reaction kettle, then add 95 grams of organic bentonite thickener measured into the masterbatch, start the reactor agitator to mix it evenly, until the organic bentonite is completely wetted (about 10 to 15 minutes), then add 12 grams of polar auxiliary dispersant, and continue to mix and stir evenly for more than 30 minutes, until the contents of the kettle form a grease structure.
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Abstract
The invention discloses a semiconductive cable filling paste and a preparation method thereof. The semiconductive cable filling paste comprises the following components in percentage by mass: 70-90% of base oil; 3-6% of an oil separation inhibitor; 0.3%-1% of an antioxidant; 5 to 12 percent of bentonite; 0.5 to 1.5 percent of dispersing agent; 3-10% of a carbon nanotube; and 1-6% of metalpowder. The semiconductive cable filling paste disclosed by the invention belongs to cold application type filling paste, does not need to be heated during filling, and can play good roles of conductivity, corrosion resistance, moisture resistance, water resistance, adhesion and the like on a wire after filling; meanwhile, the processing technology is simple, the production environment is clean, pollution is avoided, the electric conductivity and corrosion resistance are excellent, and the semiconductive cable filling paste is a novel green and environment-friendly product, has excellent electric conductivity, salt fog resistance, temperature resistance, heat resistance and weather resistance, does not separate oil from a system, and is excellent in high and low temperature performance; and after a conductor is filled with the semiconductive cable filling paste, the semiconductive cable filling paste has corrosion resistance and salt spray resistance capable of stably protecting an overhead conductor from atmospheric corrosion for long time, and can be stably retained in the conductor under condition of long-term operation of the conductor.
Description
technical field [0001] The invention relates to the field of cable filling paste, in particular to a filling paste for semi-conductive cables and a preparation method thereof. Background technique [0002] At present, the economy of my country's cable industry has achieved sustained and stable growth as a whole, and the development of the industry in the central and western regions has been further accelerated, laying a good economic foundation for the subsequent development of the industry. With the accelerated development of the telecommunications industry, the demand for overhead conductors in the five major product categories of my country's cable industry is increasing day by day, and the demand for special overhead conductors is also increasing, and the technical requirements are getting higher and higher. [0003] Overhead wire anti-corrosion grease is mostly produced by the formula and method of thickening mineral base oil with soap-based thickener. The products prep...
Claims
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Application Information
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