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A kind of temperature-resistant conductive adhesive and its preparation method and application

A conductive adhesive and adhesive technology, applied in conductive adhesives, adhesives, novolak epoxy resin adhesives, etc., can solve problems such as the decrease in the strength of the bonding layer, reduce deformation differences, reduce production costs, The effect of reducing the probability of adhesive failure

Active Publication Date: 2021-01-19
VANGUARD BEIJING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the strength of the bonding layer decreases after adding copper powder as the conductive material to the adhesive used in the pantograph carbon slide plate in the prior art, thereby providing a temperature-resistant type Conductive adhesive and its application

Method used

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  • A kind of temperature-resistant conductive adhesive and its preparation method and application
  • A kind of temperature-resistant conductive adhesive and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The raw materials of a temperature-resistant conductive adhesive are: 40g of phenolic epoxy resin, 20g of dicyclopentadiene phenolic epoxy resin, 16g of 2-methyl-4-ethylimidazole, 55g of 200-mesh copper powder, 30 Purpose copper powder 7g.

[0025] Firstly, novolac epoxy resin and dicyclopentadiene phenolic epoxy resin are melt blended, stirred until uniform and ready for use; before using as an adhesive, mix the aforementioned mixed resin with 2-methyl-4-ethylimidazole and copper Powder mix well.

Embodiment 2

[0027] A temperature-resistant conductive adhesive consists of raw materials: 70g of novolac epoxy resin, 13g of dicyclopentadiene phenolic epoxy resin, 10g of 2-methyl-4-ethylimidazole, 35g of 150 mesh copper powder, 35g Purpose copper powder 6g.

[0028] Firstly, novolac epoxy resin and dicyclopentadiene phenolic epoxy resin are melt blended, stirred until uniform and ready for use; before using as an adhesive, mix the aforementioned mixed resin with 2-methyl-4-ethylimidazole and copper Powder mix well.

Embodiment 3

[0030] The raw materials of a temperature-resistant conductive adhesive are: 50g of phenolic epoxy resin, 10g of dicyclopentadiene phenolic epoxy resin, 14g of 2-methyl-4-ethylimidazole, 60g of 100-mesh copper powder, 40 Purpose copper powder 8g.

[0031] Firstly, novolac epoxy resin and dicyclopentadiene phenolic epoxy resin are melt blended, stirred until uniform and ready for use; before using as an adhesive, mix the aforementioned mixed resin with 2-methyl-4-ethylimidazole and copper Powder mix well.

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Abstract

The invention provides a temperature-resistant conductive adhesive. The temperature-resistant conductive adhesive contains the following components in parts by weight: 40-70 parts of novolac epoxy resin, 10-16 parts of 2-methyl-4-ethylimidazole and 35-70 parts of copper powder. The curing temperature does not exceed 90 DEG C, and the deformation difference caused due to different stretching ratiosis reduced when products with different stretching ratios are adhered, so that adhesion strength is enhanced, and the problems that carbon strips are broken and fall due to the deformation of different materials are reduced.

Description

technical field [0001] The invention relates to the field of important vehicle parts, in particular to a temperature-resistant conductive adhesive. Background technique [0002] Carbon skateboard is an important part of electric locomotive, EMU, light rail, subway, etc. It directly contacts with catenary wire and belongs to the category of sliding contact contact material. The carbon strips are bonded to the pantograph with a conductive adhesive to form a pantograph carbon slide (referred to as a carbon slide). The current is obtained from the catenary wire to supply power to the locomotive. [0003] The pantograph carbon slide has the following characteristics during the working process: (1) periodic random load; (2) strong current passing through contact, generating high heat; (3) high-speed sliding to generate frictional heat; (4) environmental conditions Complex and changeable. Therefore, as a consumable, the main failure mode of the carbon skateboard is the limit of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J163/04C09J163/00C09J9/02
CPCC08K2003/085C08K2201/014C08L2205/02C09J9/02C09J163/04C08L63/00C08K3/08
Inventor 李奇段振魁
Owner VANGUARD BEIJING TECH DEV
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