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Metallized-film capacitor sealing agent

A technology for metallized films and capacitors, used in chemical instruments and methods, other chemical processes, etc.

Inactive Publication Date: 2012-03-07
TONGLING XINTAI ELECTRIC APP & CAPACITOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simply using commercial paraffin or microcrystalline wax has defects such as poor ductility and plasticity, which is easy to be brittle at low temperature and has relatively large shrinkage. The use of oil has large losses 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

[0036] A potting agent for metallized film capacitors, consisting of the following components in parts by weight:

[0037] Petroleum wax 400

[0038] Polyisobutylene 10

[0039] Vaseline 20

[0040] sulfur 10

[0041] Mica powder 10

[0042] Vermiculite powder 10

[0043] straw ashes 4

[0044] Attapulgite 10 .

Embodiment 2

[0046] A potting agent for metallized film capacitors, consisting of the following components in parts by weight:

[0047] Petroleum wax 600

[0048] Polyisobutylene 15

[0049] Vaseline 30

[0050] sulfur 15

[0051] Mica powder 15

[0052] Vermiculite powder 15

[0053] straw ashes 5

[0054] Attapulgite 15.

Embodiment 3

[0056] A potting agent for metallized film capacitors, consisting of the following components in parts by weight:

[0057] Petroleum wax 500

[0058] Polyisobutylene 13

[0059] Vaseline 25

[0060] sulfur 13

[0061] Mica powder 12

[0062] Vermiculite powder 13

[0063] straw ashes 4

[0064] Attapulgite 13.

[0065] The preparation methods of the above embodiments are as follows: at a temperature of 100° C. to 110° C., various raw materials are mixed and melted to form a uniform liquid, which is filtered and shaped.

[0066] The experimental data of potting agent that each embodiment makes is as follows:

[0067] Example 1 2 3 Volume resistivity (50°C), Ωcm 3.05*10 15 5.83*10 15 4.98*10 15 moisture none none none Mechanical impurities none none none

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Abstract

The invention provides a metallized-film capacitor sealing agent composed of components of, by weight: 40 to 60 parts of petroleum wax, 10 to 15 parts of polyisobutylene, 20 to 30 parts of vaseline, 10 to 15 parts of mica powder, 10 to 15 parts of vermiculite powder, 10 to 15 parts of sulfur, 3 to 5 parts of straw ash, and 10 to 15 parts of attapulgite. The metallized-film capacitor sealing agentprovided by the invention has good toughness and plasticity, excellent electrical properties, and appropriate kinematical viscosity. With the sealing agent, gaps between metallized-film capacitors can be conveniently filled.

Description

technical field [0001] The invention relates to the field of capacitor potting materials, in particular to an anti-metallization film capacitor potting agent. Background technique [0002] In the production of metallized film capacitors, the main dielectric and the pores between the plate and the main dielectric are usually potted with a material to improve capacitance and insulation performance, and improve partial discharge and heat resistance. Simply using commercial paraffin wax or microcrystalline wax has defects such as poor ductility and plasticity, which is easy to be brittle at low temperature and has large shrinkage. The use of oil has large loss and is easy to leak, which does not meet the requirements of current production plants. Existing patents introduce metallized film capacitor potting materials with oil as the main component, such as JP03035513 patent introduction using polybutene-alkylbenzene-cottonseed oil mixture potting, US 6,280,659 potting capacitors ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/06C08L23/20C08K3/00C08K3/06C08K3/34C09K3/10
Inventor 孔祥新
Owner TONGLING XINTAI ELECTRIC APP & CAPACITOR
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