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Composition, polymer for capacitor and capacitor

A composition and capacitor technology, applied in the direction of capacitors, capacitor electrolytes/absorbents, electrolytic capacitors, etc., can solve problems such as increased leakage current and decreased withstand voltage, and achieve the goals of preventing corrosion, reducing oxide film damage, and slowing down polymerization speed Effect

Active Publication Date: 2021-12-14
SHENZHEN CAPCHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of drop in withstand voltage and increase in leakage current caused by metal foil oxide film corrosion in existing electrolytic capacitors, the invention provides a composition, a polymer for capacitors and a capacitor

Method used

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  • Composition, polymer for capacitor and capacitor
  • Composition, polymer for capacitor and capacitor
  • Composition, polymer for capacitor and capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This embodiment is used to illustrate a method for preparing a composition, a capacitor polymer and a capacitor disclosed in the present invention, including the following steps:

[0056] With 0.07% by weight of tributyl phosphate, 0.01% by weight of 3,4-ethylenedioxythiophene-2-methyl carboxylate, and 99.92% by weight of 3,4-ethylenedioxythiophene, the above three substances Mix well to prepare a composition containing polymerized monomers, phosphoric acid ester compounds and end-capping agents.

[0057] The above composition is used as a polymerization raw material to prepare an aqueous polymer dispersion by free radical polymerization. The specific implementation process is: get 1753g water and 90.32g sodium polystyrene sulfonate, mix them uniformly at high speed in the disperser, under the protection of nitrogen atmosphere, control the temperature in the reactor to be 22°C, add 17.54g ferric sulfate aqueous solution (1.3 % concentration) and 7.25g of the above-ment...

Embodiment 2

[0060] This example is used to illustrate a composition disclosed by the present invention, a capacitor polymer and a method for preparing a capacitor, including most of the operating steps in Example 1, the difference being:

[0061] The above-mentioned The three substances are mixed evenly to prepare a composition containing polymerized monomers, phosphoric acid ester compounds and end-capping agents.

Embodiment 3

[0063] This example is used to illustrate a composition disclosed by the present invention, a capacitor polymer and a method for preparing a capacitor, including most of the operating steps in Example 1, the difference being:

[0064] The above-mentioned The three substances are mixed evenly to prepare a composition containing polymerized monomers, phosphoric acid ester compounds and end-capping agents.

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Abstract

In order to overcome the problems of drop in withstand voltage and increase in leakage current caused by metal foil oxide film corrosion in existing electrolytic capacitors, the present invention provides a composition comprising polymerized monomers, phosphoric acid ester compounds and end-capping agents; Polymerized monomers include 3,4-ethylenedioxythiophene polymerized monomers; the end-capping agent includes compounds shown in structural formula 1; wherein, R 4 selected from H or hydrocarbon groups with 1 to 6 carbon atoms. At the same time, the present invention also discloses a capacitor polymer obtained by polymerizing the above composition and a capacitor comprising the above capacitor polymer. The polymer obtained by polymerizing the composition provided by the invention can repair and protect the oxide film on the metal foil, and significantly reduce the occurrence of damage to the oxide film on the capacitor metal foil.

Description

technical field [0001] The invention belongs to the technical field of solid capacitor materials, and in particular relates to a composition, a polymer for capacitors and a capacitor. Background technique [0002] Solid electrolytic capacitors use conductive polymers with high conductivity and good thermal stability as electrolytes. Compared with conventional liquid electrolytic capacitors, they have the characteristics of good reliability, long service life, high frequency and low impedance, and resistance to large ripple currents. It overcomes the disadvantage that the electrolyte of the liquid electrolytic capacitor is easy to leak. With the rapid development of the domestic electronic information industry, from the development trend of recent years, solid electrolytic capacitors will gradually replace liquid low-voltage electrolytic capacitors, and will become one of the pillar products of the electronic information industry in the 21st century. [0003] With the improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/12H01G9/042
CPCC08G61/126H01G9/0425C08G2261/11C08G2261/3243C08G2261/3242H01G9/042C08G61/12H01G9/15H01G9/028
Inventor 赵大成燕民翔张尚军
Owner SHENZHEN CAPCHEM TECH CO LTD
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