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Protective agent for improving vulcanization resistant properties of LED silver element, as well as preparation method and use method of protective agent

A protective agent and anti-vulcanization technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of not being able to protect the silver substrate of the LED well, the encapsulation resin is easy to breathe, and the environment causes pollution.

Active Publication Date: 2016-11-16
NANCHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the first method can effectively improve the anti-sulfur ability of the LED silver substrate, the protective agent contains phosphorus elements, which will pollute the environment. The second method is easy to breath, and the encapsulation resin cannot effectively block hydrogen sulfide gas. Good protection LED silver base

Method used

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  • Protective agent for improving vulcanization resistant properties of LED silver element, as well as preparation method and use method of protective agent
  • Protective agent for improving vulcanization resistant properties of LED silver element, as well as preparation method and use method of protective agent
  • Protective agent for improving vulcanization resistant properties of LED silver element, as well as preparation method and use method of protective agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] For the preparation of the anti-silver discoloration solution, use a three-necked flask as the reaction vessel, equipped with magnetic stirring, and pass it under the protection of nitrogen gas, accurately weigh 0.2 g of diamine 4,4'-diaminodiphenyl ether, and then add N,N-diaminodiphenyl ether Methyl acetamide 10ml, after the diamine is dissolved, weigh 0.3g of dianhydride 3,3',4,4'-benzophenonetetracarboxylic dianhydride and add it to a three-necked bottle, react at 25°C for 12h, and then It was stored at 4°C until use.

[0022] Take 1ml of the above solution, add 8.0ml N,N-dimethylacetamide, shake well, and name it A 1 , take A 1 1ml, add 9ml N,N-dimethylacetamide, shake well, named A 2 , take A 2 1ml, add 9ml N,N-dimethylacetamide, shake well, named A 3 . Take three LED silver components and immerse them in the above three solutions respectively. The solution should cover the LED silver substrate, and then take it out slowly. Do not allow the solution to overfl...

Embodiment 2

[0024] For the preparation of anti-silver discoloration solution, use a three-necked flask as a reaction vessel, equipped with magnetic stirring, and pass through nitrogen protection, accurately weigh diamine, 0.2g of 4,4'-diaminodiphenyl ether, and then add N,N- 10ml of dimethylformamide, after the diamine is dissolved, weigh the dianhydride, add 0.2g of pyromellitic dianhydride into a three-necked bottle, react at 25°C for 14h, and then store it at 4°C until use.

[0025] Take 1ml of the above solution, add 6ml of N,N-dimethylformamide, shake well, and name it B. Immerse the LED silver component into the above solution, the solution should cover the LED silver substrate, then take it out slowly, do not allow the solution to overflow the groove of the LED component, and then cure it in an oven at 60°C for 1 hour.

Embodiment 3

[0027] For the preparation of anti-silver discoloration solution, use a three-necked flask as a reaction vessel, equipped with magnetic stirring, and pass through nitrogen protection, accurately weigh diamine, 0.2g of 4,4'-diaminodiphenyl ether, and then add N,N- Dimethylacetamide 10ml, after the diamine is dissolved, weigh dianhydride, 4,4-oxodiphthalic anhydride 0.3g into a three-necked bottle, react at 25°C for 15h, then place it at 4°C Save it for later use.

[0028] Take 1ml of the above solution, add 8.0ml of N,N-dimethylacetamide, shake well, name it C, take the LED silver component and immerse it in the above solution, the solution can be submerged in the LED silver substrate, then take it out slowly, do not let the solution overflow the LED The grooves of the components were then cured in an oven at 40 °C for 1 h.

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Abstract

The invention relates to a protective agent for improving vulcanization resistant properties of an LED silver element, as well as a preparation method and use method of the protective agent. The protective agent is provided with a repeated structure unit, or a mixture of two kinds, as shown in the following formula. The preparation method of the protective agent comprises the following steps of using a three-necked flask as a reaction container, performing stirring, inletting nitrogen gas, adding 0.1mol of diamine, performing dissolving with 10ml of an N,N-dimethylacetamide polarity solvent, then adding 0.1-0.15mol of dianhydride, and performing a reaction at room temperature for 12-18h. The use method of the protective agent comprises the following steps of placing an LED silver-based plate in a solution, performing soaking for 30s, and then placing the soaked LED silver-based plate in a drying oven of 30-80 DEG C for 0.5-1h. The protective agent as well as the preparation method and use method thereof disclosed by the invention have the advantages that the cost is low, a later stage encapsulate process is not influenced, a synthetic process is simple, and the vulcanization resistant properties of silver are improved.

Description

technical field [0001] The invention provides a protective agent capable of improving the anti-sulfurization performance of silver and silver-plated layers, which is applied to the protection of commemorative coins, electrical components, especially the silver bracket layer of LEDs. technical background [0002] Silver has a bright silvery white color, good electrical conductivity, thermal conductivity, and light reflection capabilities. It is often used to make silver jewelry, conductive components of electronic equipment, and LED substrates. However, silver and silver-plated layer have a fatal disadvantage, that is, they are susceptible to corrosion and discoloration by electrical components and sulfur compounds in the atmosphere, which seriously affects their application. In recent years, with the development of high-power LED lighting devices, the protection requirements for silver substrates are getting higher and higher. Common epoxy encapsulants are poor in temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C09D179/08C09D5/08C23F11/173
CPCC08G73/1071C09D5/08C09D179/08C23F11/173
Inventor 陈超金海超万明明赵丹张宁
Owner NANCHANG UNIV
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