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Low-VOCs touch screen silver paste and preparation method thereof

A touch screen, silver paste technology, applied in cable/conductor manufacturing, electrical components, circuits, etc., can solve problems such as environmental pollution, achieve less harm to production personnel and the environment, improve electrical conductivity, and improve electrical conductivity.

Pending Publication Date: 2022-04-29
衡阳思迈科科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the volatilization of organic solvents will cause serious environmental pollution

Method used

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  • Low-VOCs touch screen silver paste and preparation method thereof

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preparation example Construction

[0034] In addition, the present invention also provides the preparation method of above-mentioned conductive silver paste, comprises the steps:

[0035] S1: Add low-viscosity epoxy resin and polyester hyperbranched epoxy resin to reactive diluent, heat and stir at 80°C for 6 hours, then filter through 400-mesh polyester mesh, cool the collected filtrate to room temperature, and obtain resin dispersion body;

[0036] S2: Add additives such as curing agent and coupling agent to the resin dispersion, disperse at a high speed of 50-300r / min for 10min; then disperse evenly through three-roll grinding to obtain a silver paste precursor;

[0037] S3: Add silver powder to the precursor, disperse at high speed for 5 minutes, and grind the obtained mixture 5 to 7 times with three rollers, so that the fineness of the ground mixture does not exceed 5 microns, and then use a revolution and rotation rotary defoamer for 3 minutes at 1600r / min Rotary defoaming, the vacuum degree of rotary de...

Embodiment 1

[0040]This embodiment provides a silver paste for a touch screen. The raw material components are calculated in parts by weight, including: 10 parts of bisphenol F epoxy ED-509S epoxy resin, 2 parts of polyester hyperbranched epoxy resin, 1,4- 11 parts of butanediol glycidyl ether, 1 part of hexafluoroantimonate, 0.8 parts of fumed silica, 0.2 parts of silane coupling agent, and 75 parts of flaky silver powder with an average particle diameter of 2 microns.

[0041] According to above-mentioned raw material, adopt preparation method provided by the invention, prepare conductive silver paste:

[0042] S1: Add low-viscosity epoxy resin and polyester hyperbranched epoxy resin to reactive diluent, heat and stir at 80°C for 6 hours, then filter with 400-mesh polyester mesh, and cool the collected filtrate to room temperature to obtain resin Dispersion; S2: add curing agent, coupling agent and other additives to the resin dispersion, disperse at a high speed of 50-300r / min for 10min...

Embodiment 2

[0044] This embodiment provides a silver paste for a touch screen. The raw material components are calculated in parts by weight, including: 12 parts of NPEF-170 novolac epoxy resin, 2 parts of polyester hyperbranched epoxy resin, 1,4-butanediol glycidol 11 parts of ether, 1 part of hexafluoroantimonate, 0.8 parts of fumed silica, 0.2 parts of silane coupling agent, and 73 parts of flaky silver powder with an average particle diameter of 2 microns.

[0045] According to above-mentioned raw material, adopt preparation method provided by the invention, prepare conductive silver paste:

[0046] S1: Add low-viscosity epoxy resin and polyester hyperbranched epoxy resin to reactive diluent, heat and stir at 80°C for 6 hours, then filter with 400-mesh polyester mesh, and cool the collected filtrate to room temperature to obtain resin Dispersion; S2: add curing agent, coupling agent and other additives to the resin dispersion, disperse at a high speed of 50-300r / min for 10min; then di...

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Abstract

The low-VOCs touch screen silver paste comprises the following raw material components in parts by weight: 7-15 parts of epoxy resin, 2-5 parts of hyperbranched epoxy resin, 5-15 parts of a reactive diluent, 1-3 parts of a curing agent, 1-3 parts of an auxiliary agent and 60-80 parts of silver powder. The low-VOCs touch screen silver paste provided by the invention is small in curing volatilization, has excellent printability, conductivity and adhesive force on various membrane materials, and is particularly suitable for a glass touch screen.

Description

technical field [0001] It relates to a touch screen silver paste and its preparation, especially relates to a low-VOC type touch screen silver paste and its preparation, which has excellent printability, conductivity, and adhesion on various substrates, is suitable for glass substrate technology, and has Very good fluidity and leveling properties. Background technique [0002] Touch-screen is boundless in the range of application of my country, mainly contains the inquiry of mobile phone, computer, vehicle-mounted central control, public information; As the service inquiry of departments such as telecommunication bureau, the tax bureau, bank, electric power; The information inquiry of city street; Office, industrial control, military command, electronic games, ordering songs and dishes, multimedia teaching, real estate pre-sale, etc. In the future, touch screens will also enter the family. The touch screen conductive silver paste is a low-temperature baking conductive silve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/02H01B13/00
CPCH01B1/02H01B13/00
Inventor 王广胜
Owner 衡阳思迈科科技有限公司
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