Wax for impregnation and encapsulation of ceramic dielectric capacitors and its preparation method

A technology for encapsulating wax and capacitors, which is applied in the direction of fixed capacitor shell/package, fixed capacitor components, etc., can solve the problems of unfavorable improvement of the installation rate and high cost, and achieves suitable physical and chemical properties, good use performance, and dipping coating. thin effect

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Use resin materials to achieve moisture resistance and meet electrical performance. The advantages are stable performance and good high temperature performance, but the cost is high.
CN101173158 discloses a metallized film capacitor potting wax, which is only suitable for the potting of low-voltage self-healing metallized polyinner film power capacitors. When used in ceramic capacitors, the wax layer on the surface of the element is slightly thick, which is not conducive to improving Chance

Method used

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  • Wax for impregnation and encapsulation of ceramic dielectric capacitors and its preparation method
  • Wax for impregnation and encapsulation of ceramic dielectric capacitors and its preparation method
  • Wax for impregnation and encapsulation of ceramic dielectric capacitors and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] Embodiment: (below all represent by weight percentage)

[0029] experiment method

[0030] The following test methods are the usual ones for testing waxes used in the electronics industry used in the examples.

[0031] Dropping melting point GB / T 8026

[0032] Penetration GB / T 4985

[0033] Kinematic viscosity GB / T265

[0034] Dielectric constant GB / T 5654

[0035] Volume resistivity GB / T 5654

[0036] Dielectric loss factor GB / T 5654

Embodiment 1

[0039] No. 80 microcrystalline wax, drop melting point 81.6°C (Jimen Refinery) 62%

[0040] Fully refined paraffin wax No. 62, melting point 62.1°C (Dalian Petrochemical Company) 36%

[0041] Polyethylene wax L-913, average molecular weight 2582 (Beijing Auxiliary No. 2 Factory) 1.8%

[0042] Antioxidant, 2,6-di-tert-butyl-p-cresol (Shenyang Second Reagent Factory) 0.2%

Embodiment 2

[0044] No. 80 microcrystalline wax, drop melting point 81.6°C (Jingmen Oil Refinery) 50%

[0045] No. 64 fully refined paraffin wax, molten gas 65.5°C (Dalian Petrochemical Company) 48%

[0046] Polyethylene wax L-913, average molecular weight 2582 (Beijing Auxiliary No. 2 Factory) 1.5%

[0047] Antioxidant, 2,6-di-tert-butyl-p-cresol (Shenyang Second Reagent Factory) 0.5%

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Abstract

The invention discloses a wax for impregnation and encapsulation of ceramic dielectric capacitors and its preparation method. The wax comprises, by weight: 35%-70% of a microcrystalline wax, 25%-60% of paraffin, 1%-5% of a high-molecular wax, and 0.1-1.5% of an anti-oxidant. The wax for impregnation and encapsulation in the invention has the characteristics of good insulativity, moisture resistance, heat resistance and fluidity, thin impregnating coating, suitable physical and chemical performance, good using performance, nontoxicity, no pollution as well as environmental friendliness, and issuitable for impregnation and encapsulation of ceramic dielectric capacitors.

Description

technical field [0001] The invention relates to an impregnation encapsulation wax, which is especially suitable for the impregnation encapsulation of ceramic capacitors. Background technique [0002] In the production process of ceramic capacitors, it is required to use impregnated encapsulation wax to impregnate and encapsulate the surface of ceramic capacitors to achieve the purpose of insulation and moisture resistance. Since the color TV industry has introduced a large number of automatic plug-in machines, the failure rate of this automatic plug-in machine is closely related to the amount of wax layer on the surface of the component. If the wax layer on the surface of the component is obvious, the lower the failure rate. In order to improve the chance of sealing, it is required that the wax impregnated layer on the surface of the component should be as thin as possible without affecting the insulation and moisture resistance of the component. Existing patents introduce ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/06C08L23/06C08K5/13H01G4/224
Inventor 李尚勇李莉
Owner CHINA PETROLEUM & CHEM CORP
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