Single-component high temperature vulcanization conductive glue and preparation method thereof

A technology of conductive glue and high-temperature vulcanization, which is applied in the direction of conductive adhesives and adhesives, can solve problems such as inconvenient operation, complicated process, and poor adhesion, and achieve the effects of reducing assembly time, reducing raw materials, and excellent toughness

Inactive Publication Date: 2015-06-24
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many single- and two-component high-temperature-vulcanized conductive adhesives and single- and two-component room-temperature-vulcanized conductive adhesives on the market. The single-component room-temperature-vulcanized conductive adhesive has poor storage stability and long vulcanization time, and the two-component vulcanized conductive adhesive process is complicated. Inconvenient, but the fatal flaws are: the toughness of the vulcanized rubber strip is poor, which is manifested in low tear strength and elongation at break; poor adhesion to metal, especially poor adhesion to aluminum plates

Method used

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  • Single-component high temperature vulcanization conductive glue and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0019] Embodiment 1~3 is prepared according to the following steps:

[0020] (1) Conductive powder drying: Bake the conductive powder in a blast drying oven at 70°C for 2 hours to remove moisture;

[0021] (2) Conductive powder coating: at room temperature, put the conductive powder in step (1) into a high-speed mixer, slowly add the solution in which the coupling agent is dissolved, stir for 1-3 hours, and the filtered conductive powder The body is dried at 80-130°C for 0.5-2h, and it can be made into a conductive powder coated with a coupling agent. The amount of the coupling agent is 0.5-5% of the solvent, and the solution is toluene;

[0022] (3) Mixing: Addition-type liquid silicone rubber, catalyst with special structure, thixotropic agent, methyl hydrogen silicone oil, silicone oil containing special groups, conductive powder with coupling agent treatment prepared in step (2), at room temperature Add it to a double planetary mixer for 10-20 minutes and mix it, the stir...

Embodiment 1-3

[0024] raw material Example 1 Example 2 Example 3 Comparative example 1 Comparative example 2 Comparative example 3 Addition type liquid silicone rubber (molecular weight 15~20w, commercially available) 80 70 90 80 70 90 Titanate coupling agent KR-TTS 0.01 A-174 (commercially available) 0.01 0.01 0.01 Aluminate coupling agent DL-411 0.01 0.01 Platinum catalyst with core-shell structure (commercially available) 0.0002 0.0002 0.0002 Ordinary platinum catalyst 0.0002 0.0002 0.0002 Hydroxy silicone oil 10 10 epoxy silicone oil 10 10 10 Ordinary silicone oil 10 Methyl hydrogen silicone oil 10 10 10 10 10 10 Fumed silicon (particle size: 30nm) 15 15 15 15 15 15 Silver clad copper 100 100 Nickel coated graphite 100 100 Sterling silver 100 ...

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Abstract

The invention relates to a single-component high temperature vulcanization conductive glue and a preparation method thereof. The conductive glue is mainly composed of additional liquid silicone rubber, a coupling agent, a catalyst with a special structure, a thixotropic agent, methyl hydrogen silicone oil, silicone oil containing a special group, and conductive powder. A glue dispensing pad made by using the above product can reduce raw materials and shorten the assembling time; the single-component conductive glue has the advantages of no mixing of raw material components, production period shortening and elimination of irrelevant wastes; and a vulcanized glue strip has excellent toughness, and has good caking property with various plastic and metal substrates, especially aluminum plates. The product can be used in an automatic glue dispensing technology, that is the single-component high temperature vulcanization conducting glue is injected to the flange surface of a die or an object through a program preset on a special device to form an assembly in order to meet integral shielding requirement.

Description

technical field [0001] The invention belongs to an electromagnetic shielding organic material, in particular to a single-component high-temperature vulcanized conductive glue with high bonding energy and a preparation method thereof. Background technique [0002] With the development of modern high-tech, electromagnetic interference (EMI) and electromagnetic compatibility (EMC) problems caused by electromagnetic waves are becoming more and more serious, which not only cause interference and damage to electronic instruments and equipment, affect their normal work, but also pollute the environment and endanger human beings. Health; In addition, the leakage of electromagnetic waves will also endanger national information security and the security of military core secrets. Therefore, exploring efficient electromagnetic shielding materials to prevent electromagnetic interference and electromagnetic compatibility problems caused by electromagnetic waves is of great significance fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/07C09J9/02
Inventor 王守立王建斌陈田安解海华牛青山
Owner YANTAI DARBOND TECH
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