Wax for self-healing metalized capacitor

A metallized capacitor, self-healing technology, applied in the field of potting materials, can solve the problems of reducing wax shrinkage, unable to eliminate the shrinkage and swelling of solid wax, and unable to solve the problem of swelling and leakage of polypropylene film, etc., to achieve low temperature shrinkage small effect

Active Publication Date: 2014-01-29
江苏泰尔新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN101173158A, Chinese patent CN102367331A, Chinese patent CN102382474A, the document "Development and Application of Impregnated Potting Wax for Power Capacitors" (Contemporary Chemical Industry, Volume 36, Issue 4) and other materials all involve the modification of petroleum wax to effectively reduce The shrinkage of the wax, but it can not solve the swelling of the polypropylene film and the oil leakage of the low-carbon hydrocarbons (mainly mineral oil) in the petroleum wax, so it is still impossible to prevent the shrinkage of the solid wax when it solidifies and the impact on the polypropylene film in the capacitor. swelling phenomenon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Step (1), pre-melt 10 parts of microcrystalline wax, add 0.1 part of hydrogenated styrene-butadiene rubber, control the temperature at 120±5°C, stir for 60 min, and the stirring speed is 60 r / min;

[0053] Step (2), add 4.9 parts of hydroxyl-terminated polybutadiene, control the temperature at 100±5°C, stir for 60 min, and the stirring speed is 60 r / min;

[0054] Step (3), add 5 parts of oil-gelling agent, control the temperature not lower than 90°C, stir for 60 min, and the stirring speed is 60 r / min;

[0055] Step (4), finally add 80 parts of vegetable oil slowly, control the temperature not lower than 90°C, stir for 60 min, and the stirring speed is 60 r / min;

[0056] Step (5), discharging, cooling and molding to obtain the wax for self-healing metallized capacitors.

Embodiment 2

[0058] Step (1), pre-melt 20 parts of microcrystalline wax, add 0.1 part of hydrogenated styrene-butadiene rubber, control the temperature at 120±5°C, stir for 70 min, and the stirring speed is 60 r / min;

[0059] Step (2), add 4.9 parts of hydroxyl-terminated polybutadiene, control the temperature at 100±5°C, stir for 70 min, and the stirring speed is 60 r / min;

[0060] Step (3), add 5 parts of oil-gelling agent, control the temperature not lower than 90°C, stir for 60 min, and the stirring speed is 60 r / min;

[0061] Step (4), finally slowly add 70 parts of vegetable oil, control the temperature not lower than 90°C, stir for 70 min, and the stirring speed is 60 r / min;

[0062] Step (5), discharging, cooling and molding to obtain the wax for self-healing metallized capacitors.

Embodiment 3

[0064] Step (1), pre-melt 30 parts of microcrystalline wax, add 0.1 part of hydrogenated styrene-butadiene rubber, control the temperature at 120±5°C, stir for 80 min, and the stirring speed is 60 r / min;

[0065] Step (2), add 4.9 parts of hydroxyl-terminated polybutadiene, control the temperature at 100±5°C, stir for 80 min, and the stirring speed is 60 r / min;

[0066] Step (3), add 5 parts of oil-gelling agent, control the temperature not lower than 90°C, stir for 60 min, and the stirring speed is 60 r / min;

[0067] Step (4), finally slowly add 60 parts of vegetable oil, control the temperature not lower than 90°C, stir for 60 min, and the stirring speed is 60 r / min;

[0068] Step (5), discharging, cooling and molding to obtain the wax for self-healing metallized capacitors.

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Abstract

The invention discloses a wax for a self-healing metalized capacitor. The wax for the self-healing metalized capacitor is prepared according to the following formula: 10-30% of microcrystalline wax, 60-80% of vegetable oil, 3-5% of hydroxyl-terminated modified liquid rubber, 1-5% of oil gelling agent and 0.1-2% of hydrogenated styrene-butadiene rubber. The invention also provides a preparation method of the wax for the self-healing metalized capacitor. The wax for the self-healing metalized capacitor, prepared by the invention, is small in shrinking percentage at low temperature, free of oil leakage at high temperature and almost free of swelling for a polypropylene membrane of the capacitor.

Description

technical field [0001] The invention relates to a potting material, in particular to an insulating potting material for a self-healing metallized capacitor. Background technique [0002] In the electrical industry, self-healing metallized capacitors, as one of the electronic components, have developed rapidly due to their excellent cost performance, stable reactive power compensation and safety. With the continuous improvement and improvement of electrical manufacturing technology, the insulation of capacitors The performance requirements of sealing materials are also constantly increasing. [0003] Potting wax is the first choice of most low-voltage shunt capacitor manufacturers at present, because it has good electrical properties, heat resistance and aging stability, and its price is low. However, wax is a solid impregnated potting compound, which will shrink and crack, and the pores formed will easily lead to ionization, and discharge at a higher voltage, causing breakd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/00C08L91/06C08L15/00C08K5/101
Inventor 李毅刘家芳
Owner 江苏泰尔新材料股份有限公司
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