Potting wax for capacitor and preparation method thereof

A technology of potting wax and capacitors, which is applied in the field of capacitors, which can solve the problems of affecting the service life of capacitors, poor oxidation resistance, brittle cracking and shrinkage, etc., to ensure work stability and service life, enhance cold shrinkage characteristics and high temperature stability Outstanding performance in resistance to cracking at low temperature

Inactive Publication Date: 2018-04-20
陈馨雅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simply using commercial paraffin wax or microcrystalline wax has defects such as poor toughness and plasticity, brittleness and large shrinkage at low temperatures, and when shrinkage or cracking occurs, pores will be formed, which will easily lead to ionization, and at a higher voltage Under discharge, breakdown occurs, which affects the service life of the capacitor; and the existing commercial paraffin wax or microcrystalline wax has poor oxidation resistance, and after the wax is oxidized, its color becomes darker, and the overall acid value increases, which will cause Affect the dielectric characteristics, working stability and service life of capacitors
The use of oil has a large loss and is easy to leak, which does not meet the requirements of the current production plant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A potting wax for capacitors, made of the following parts by weight:

[0020] 260 parts paraffin wax, 18 parts composite filler, 3 parts coumarone resin, 3 parts carbon five petroleum resin, 2 parts terpene resin, 4 parts olive oil, 2 parts peanut oil, 1 part polyisoprene, 2 parts 18 Sodium alkyl sulfonate, 6 parts of beeswax, 1 part of sodium carboxymethyl cellulose, 1 part of sodium alginate, 4 parts of isopentaerythritol, 1 part of calcium stearate, 1 part of stearic acid file; the composite filler It is made of the following parts by weight: 90 parts of zeolite, 25 parts of black talc, 15 parts of zeolite, 6 parts of hexacyclic stone, 4 parts of pyrophyllite, 2 parts of sepiolite.

[0021] Further, the preparation method of the composite filler includes the following steps:

[0022] (1) Put zeolite, black talc, zeolite, hexacyclic stone, pyrophyllite, and sepiolite together and calcined at 550℃ for 2.5 hours and then take it out for use;

[0023] (2) The zeolite, black tal...

Embodiment 2

[0031] A potting wax for capacitors, made of the following parts by weight:

[0032] 270 parts paraffin wax, 20 parts composite filler, 4 parts coumarone resin, 4 parts carbon five petroleum resin, 3 parts terpene resin, 6 parts olive oil, 3 parts peanut oil, 2 parts polyisoprene, 3 parts 18 Sodium alkyl sulfonate, 7 parts of beeswax, 2 parts of sodium carboxymethyl cellulose, 2 parts of sodium alginate, 5 parts of isoprenol, 1.5 parts of calcium stearate, 1.5 parts of stearic acid file; the composite filler It is made from the following parts by weight: 95 parts of zeolite, 28 parts of black talc, 18 parts of zeolite, 7 parts of hexacyclic stone, 6 parts of pyrophyllite, 4 parts of sepiolite. The rest of the method steps are the same as in Example 1.

Embodiment 3

[0034] A potting wax for capacitors, made of the following parts by weight:

[0035] 280 parts of paraffin wax, 22 parts of composite filler, 5 parts of coumarone resin, 5 parts of carbon five petroleum resin, 4 parts of terpene resin, 7 parts of olive oil, 4 parts of peanut oil, 3 parts of polyisoprene, 4 parts of eighteen Sodium alkyl sulfonate, 8 parts of beeswax, 3 parts of sodium carboxymethyl cellulose, 3 parts of sodium alginate, 6 parts of isopentaerythritol, 2 parts of calcium stearate, 2 parts of stearic acid file; the composite filler It is made from the following parts by weight: 100 parts of zeolite, 30 parts of black talc, 20 parts of zeolite, 8 parts of hexacyclic stone, 7 parts of pyrophyllite, and 5 parts of sepiolite. The rest of the method steps are the same as in Example 1.

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PUM

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Abstract

The invention discloses a potting wax for a capacitor, belonging to the technical field of capacitors. The potting wax is prepared from the following substances: paraffin wax, a composite filling material, coumarone resin, C-5 petroleum resin, terpene resin, olive oil, peanut oil, polyisoprene, sodium octadecyl sulfonate, beeswax, sodium carboxymethylcellulose, sodium alginate, pentaerythritol, calcium stearate and barium stearate. The potting wax eventually prepared in the invention has excellent electrical properties, outstanding resistance to oxidation and low-temperature cracking, and goodmoisture resistance, fluidity and temperature resistance, ensures the stability and service life of the capacitor, and is high in use value.

Description

Technical field [0001] The invention relates to the technical field of capacitors, in particular to a capacitor potting wax and a preparation method thereof. Background technique [0002] In the production of metallized film capacitors, the main medium and the pores between the plates and the main medium are usually potted with a material to increase the capacitance and insulation performance, and improve partial discharge, heat resistance and stability. Simply using commercial paraffin wax or microcrystalline wax, there are defects such as poor toughness and plasticity, easy brittleness and large shrinkage at low temperature, and when shrinkage or cracking occurs, pores will be formed and ionization will be caused, and at higher voltages Under discharge, breakdown occurs, which affects the service life of the capacitor; and the existing commercial paraffin wax or microcrystalline wax has poor oxidation resistance. After the wax is oxidized, its color becomes darker and the overa...

Claims

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Application Information

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IPC IPC(8): C08L91/06C08L45/02C08L57/02C08L45/00C08L91/00C08L9/00C08L1/28C08L5/04C08K13/06C08K9/00C08K9/04C08K5/053C08K5/42C08K5/098C08K7/26H01G4/224H01G4/33
CPCC08L91/06C08K2201/003C08K2201/014C08L2201/08C08L2203/206C08L2205/025C08L2205/035H01G4/224H01G4/33C08L45/02C08L57/02C08L45/00C08L91/00C08L9/00C08L1/286C08L5/04C08K13/06C08K9/00C08K9/08C08K9/04C08K5/053C08K5/42C08K5/098C08K7/26
Inventor 陈馨雅
Owner 陈馨雅
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