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A kind of preparation method of conductive silver paste for high stability touch screen

A conductive silver paste, high stability technology, applied in conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc. Problems such as poor electrical conductivity, to achieve the effects of improved stability, high stability and good adhesion

Active Publication Date: 2017-04-19
CAIHONG GRP ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many manufacturers of conductive silver paste for touch screen in China. Generally, in order to improve the adhesion, it is necessary to add chelating agent materials, but the addition of chelating agent will cause the stability of conductive silver paste to decrease, that is, as the storage time prolongs, The conductivity of the silver paste will deteriorate and the resistance value will increase

Method used

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  • A kind of preparation method of conductive silver paste for high stability touch screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Production of polymer resin carrier:

[0026] First weigh the solvent I DBE75% and 25% polyester resin A (molecular weight is 15000 polymer polyester resin) according to the mass percentage, pour into the reaction kettle, stir and dissolve at a temperature of 85°C, and stir at a constant temperature of 85°C for 3 hours , until it is completely dissolved, then pass the dissolved resin carrier through a 300-mesh sieve, and filter to remove impurities; obtain the polymer resin carrier D;

[0027] Take solvent I DBE70%, 21.5% macromolecular resin B (molecular weight is 22000 vinyl acetate resins) and 8.5% polyester resin C (molecular weight is 75000 polyester resins) by mass percentage, pour into reactor, at temperature 85 Dissolve at ℃, stir at 85℃ for 3 hours until completely dissolved, then pass the dissolved resin carrier through a 300-mesh sieve, filter and remove impurities; obtain polymer resin carrier E;

[0028] First weigh the solvent I DBE85% and nitroce...

Embodiment 2

[0032] Step 1: Production of polymer resin carrier:

[0033] First take by weight the solvent 1 diethyl adipate 80% and 20% polyester resin A (molecular weight is 20000 macromolecular polyester resin) by mass percentage, pour into reactor, be that stirring and dissolving under 85 ℃ at temperature, in Stir at a constant temperature of 85°C for 3 hours until it is completely dissolved, then pass the dissolved resin carrier through a 300-mesh sieve, and filter to remove impurities; obtain a polymer resin carrier D;

[0034] Take solvent 1 diethyl adipate 75.0%, 18.0% polymer resin B (molecular weight is 25000 vinyl acetate resin) and 7.0% polyester resin C (molecular weight is 75000 polyester resin) by mass percentage, pour into reaction Kettle, dissolved at a temperature of 85°C, stirred at a constant temperature of 85°C for 3 hours until completely dissolved, then passed the dissolved resin carrier through a 300-mesh sieve, and filtered to remove impurities; the polymer resin c...

Embodiment 3

[0039]Step 1: Production of polymer resin carrier:

[0040] First take by weight the solvent I ethylene glycol butyl ether acetate 70% and 30% polyester resin A (molecular weight is 15000 macromolecular polyester resins) by mass percentage, pour into reactor, be that stirring and dissolving under 85 ℃ at temperature, in Stir at a constant temperature of 85°C for 3 hours until it is completely dissolved, then pass the dissolved resin carrier through a 300-mesh sieve, filter to remove impurities, and obtain a polymer resin carrier D;

[0041] Take solvent I ethylene glycol butyl ether acetate 70.0%, 20.0% macromolecular resin B (molecular weight is 30000 vinyl acetate resin) and 10.0% macromolecular resin C (molecular weight is 80000 polyester resin) by mass percentage, pour reaction Kettle, dissolved at a temperature of 85°C, stirred at a constant temperature of 85°C for 3 hours until completely dissolved, then passed the dissolved resin carrier through a 300-mesh sieve, and fi...

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Abstract

The invention provides a preparation method of high-stability conductive silver paste used for a touch screen. Step one: high-molecular resin carriers A, high-molecular resin carriers B and high-molecular resin carriers C are respectively manufactured; and step two: the three substances of the step one are mixed with sheet-shaped silver powder, additives, binders, dispersants and solvents by a high-speed mixer and then rolling manufacturing is performed thought a three-roller grinder, then defoaming is performed on the obtained paste material through a vacuum defoaming and filtering device and filtering is performed through a mesh screen, and finally the conductive silver paste is obtained through uniform stirring. The high-stability conductive silver paste used for the touch screen can be provided. The new adhesion binders and the new dispersants are introduced so that a defect of mutual contradiction of stability and adhesion can be effectively overcome, the high-stability conductive silver paste used for the touch screen has great adhesion and also has relatively high stability and thus stability is greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of conductive silver paste, and in particular relates to a preparation method of conductive silver paste for a high-stability touch screen. Background technique [0002] In recent years, the application of touch screen technology in various fields has grown rapidly, especially in different electronic products such as computers, TVs, mobile phones and digital products, and the key materials printed on the touch screen by screen printing technology- Conductive silver paste is usually prepared from flake conductive silver powder, polymer resin, organic solvent, additives, etc. by mechanical mixing and rolling in a certain proportion, and is screen printed on ITO (indium tin oxide), On substrates such as PET or electronic glass, cure at 120-150°C for 30-60 minutes to form conductive patterns. At present, there are many manufacturers of conductive silver paste for touch screen in China. Generally, in order to im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B1/22G06F3/041
Inventor 杨彬亚郑小军王晓云樊钊峰寇冠
Owner CAIHONG GRP ELECTRONICS CO LTD