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Preparation method of heatproof seal rubber for capacitors

A capacitor and heat-resistant technology, applied in the field of capacitors, can solve problems such as poor thermal stability, achieve good thermal stability, improve thermal stability and mechanical properties, and high impact strength

Inactive Publication Date: 2018-06-15
合肥市易远新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is still a technical problem of poor thermal stability in the sealing rubber of capacitors, which needs to be solved urgently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of heat-resistant sealing rubber for capacitors, comprising the steps of:

[0022] S1, 40g styrene-butadiene rubber, 25g nitrile silicone rubber, 2g polycarbonate, 40g talcum powder compound, 2g hard clay, 5g glass fiber, 0.5g pine tar, 2g microcrystalline paraffin, 1g lauric acid, 2g oleic acid 1. 1g of antioxidant BHT was mixed evenly to obtain a mixed rubber;

[0023] S2. Add 2g of tert-butyl hydroperoxide and 0.1g of sodium ammonium dichromate to the mixed rubber, mix evenly, and vulcanize. The vulcanization temperature is 195°C, and the vulcanization time is 2min. Extrude to obtain a heat-resistant seal for capacitors. rubber.

[0024] The talc powder compound is prepared by the following process: mix 40g talc powder, 2g sodium alginate, 6g palladium chloride, and 60g water evenly, add a sodium hydroxide solution with a concentration of 1.2mol / L to adjust the pH value of the system to 5.1-5.8, and put it in a water bath Insulate for 25 minute...

Embodiment 2

[0026] A preparation method of heat-resistant sealing rubber for capacitors, comprising the steps of:

[0027] S1, 50g styrene-butadiene rubber, 15g nitrile silicone rubber, 8g polycarbonate, 20g talcum powder compound, 6g hard clay, 1g glass fiber, 1.2g pine tar, 1g microcrystalline paraffin, 2g lauric acid, 1g oleic acid , 2g of antioxidant BHT mixed evenly to obtain the mixed rubber;

[0028] S2. Add 1g of tert-butyl hydroperoxide and 0.4g of sodium ammonium dichromate to the mixed rubber, mix evenly, and vulcanize. The vulcanization temperature is 185°C, and the vulcanization time is 4min. Extrude to obtain a heat-resistant seal for capacitors. rubber.

[0029] The talcum powder compound is prepared by the following process: mix 20g talc powder, 8g sodium alginate, 2g palladium chloride, and 100g water evenly, add a 0.8mol / L sodium hydroxide solution to adjust the pH value of the system to 5.1-5.8, and put it in a water bath Insulate for 35 minutes, the temperature of th...

Embodiment 3

[0031] A preparation method of heat-resistant sealing rubber for capacitors, comprising the steps of:

[0032] S1, 44g styrene-butadiene rubber, 20g nitrile silicone rubber, 4g polycarbonate, 35g talcum powder compound, 3g hard clay, 4g glass fiber, 0.6g pine tar, 1.8g microcrystalline paraffin, 1.3g lauric acid, 1.6 g oleic acid, 1.2g antioxidant BHT were mixed evenly to obtain the rubber compound;

[0033] S2. Add 1.7g tert-butyl hydroperoxide and 0.2g sodium ammonium dichromate to the mixed rubber, knead evenly, and vulcanize. The vulcanization temperature is 192°C, and the vulcanization time is 2.5min. Extrusion molding is obtained to obtain a capacitor. Heat-sealed rubber.

[0034] The talcum powder compound is prepared by the following process: mix 35g talc powder, 4g sodium alginate, 5g palladium chloride, and 70g water evenly, add a 1mol / L sodium hydroxide solution to adjust the pH value of the system to 5.1-5.8, and keep it warm in a water bath After 28 minutes, the...

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PUM

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Abstract

The invention discloses a preparation method of heatproof seal rubber for capacitors. The method comprises the following steps: uniformly mixing styrene butadiene rubber, nitrile silicone rubber, polycarbonate, a talcum powder compound, hard clay, glass fibers, pine tar, microcrystalline paraffin, lauric acid, oleic acid and an antioxidant BHT to obtain a rubber compound; and adding a vulcanizingagent to the rubber compound, uniformly mixing the obtained mixture, vulcanizing the mixture at 185-195 DEG C for 2-4 min, and performing extrusion molding to obtain the heatproof seal rubber for capacitors. The seal rubber prepared through the preparation method of the heatproof rubber for capacitors forms a highly-crosslinked network structure, and has the advantages of excellent heat stability,excellent mechanical performances and high impact strength.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a preparation method of heat-resistant sealing rubber for capacitors. Background technique [0002] Capacitors are important basic components of electronic circuits. Long life and high reliability are the goals that manufacturers have always pursued. In an aluminum electrolytic capacitor, the capacitor element is housed in a case together with an electrolytic substance, and the opening of the case is sealed with sealing rubber. At present, there is still a technical problem of poor thermal stability in the capacitor sealing rubber, which needs to be solved urgently. Contents of the invention [0003] Based on the technical problems in the background technology, the present invention proposes a method for preparing heat-resistant sealing rubber for capacitors. The obtained sealing rubber forms a highly cross-linked network structure, has excellent thermal stability and mecha...

Claims

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Application Information

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IPC IPC(8): C08L9/06C08L83/08C08L69/00C08L95/00C08L91/06C08L5/04C08K13/04C08K3/34C08K7/14C08K3/24C08K5/14
CPCC08L9/06C08L2201/08C08L2203/206C08L2205/035C08L83/08C08L69/00C08L95/00C08L91/06C08L5/04C08K13/04C08K3/34C08K3/346C08K7/14C08K3/24C08K5/14
Inventor 黄洁
Owner 合肥市易远新材料有限公司
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