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One-component silicone conductive silver glue and preparation method thereof

A conductive silver adhesive, single-component technology, applied in the field of conductive adhesive, can solve the problems of affecting the working environment, harming the health of online operators, and unfavorable application, and achieving the effects of simple process, convenient storage and transportation, and convenient and efficient construction.

Active Publication Date: 2019-01-11
江苏明昊新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the addition of curing agent, a lot of auxiliary equipment is required in the process of using the conductive silver glue with fixing agent, so it is not conducive to the application on the industrial assembly line; moreover, in the curing process, curing accelerators, diluents, etc. The volatilization is relatively serious, and the volatilized gas contains certain toxic and harmful substances, which not only affects the working environment, but also has the risk of harming the health of online workers.

Method used

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  • One-component silicone conductive silver glue and preparation method thereof
  • One-component silicone conductive silver glue and preparation method thereof
  • One-component silicone conductive silver glue and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A) Prepare the base material, 60 parts of α, ω-dihydroxy polydimethylsiloxane (referred to as 107 glue) with a viscosity of 15000mPa·s weighed in parts by weight and a density of 0.963g / cm 3 And 15 parts of simethicone oil with a viscosity of 100mPa·s, a particle size of 1μm and a specific surface area of ​​1.72m 2 / g and the bulk density is 1.9g / m 3 105 parts of ultra-fine spherical or similar spherical silver powder, 13 parts of conductive carbon fiber powder with a particle size of 1.2 mm and a bulk density of 1.74 g / cm through a 300 mesh sieve and a bulk density of 300 g / L 3 Add 12 parts of polycrystalline graphite powder into the high-speed dispersing mixer to disperse and stir, and control the vacuum degree to 0.09MPa during the stirring process of the high-speed dispersing mixer, control the stirring temperature to 115°C, control the stirring time to 120min, control the stirring speed to 450rpm, and cool to After normal temperature, it is transferred to a three-...

Embodiment 2

[0025] A) Prepare the base material, 65 parts of α, ω-dihydroxy polydimethylsiloxane (referred to as 107 glue) with a viscosity of 20000mPa·s weighed in parts by weight and a density of 0.963g / cm 3 And 10 parts of vinyl silicone oil with a viscosity of 500mPa·s, a particle size of 0.2μm and a specific surface area of ​​1.2m 2 / g and bulk density is 0.6g / m 3 100 parts of ultra-fine spherical or similar spherical silver powder, 15 parts of conductive carbon fiber powder with a particle size of 1 mm and a bulk density of 1.76 g / cm through a 100-mesh sieve and a bulk density of 570 g / L 3 Add 15 parts of the polycrystalline graphite powder to the planetary mixer for dispersion and stirring, and control the vacuum degree to 0.08MPa during the stirring process of the planetary mixer, control the stirring temperature to 110°C, control the stirring time to 130min, control the stirring speed to 550rpm, and cool to room temperature after stirring Transfer to a three-roll mill and grind ...

Embodiment 3

[0028] A) Prepare the base material, 75 parts of α, ω-dihydroxy polydimethylsiloxane (referred to as 107 glue) with a viscosity of 18000mPa·s weighed in parts by weight and a density of 0.963g / cm 3 And 12 parts of methyl vinyl silicone oil with a viscosity of 450mPa·s, a particle size of 0.6μm and a specific surface area of ​​2.5m 2 / g and the bulk density is 1.6g / m 3 95 parts of ultra-fine spherical or nearly spherical silver powder, 11 parts of conductive carbon fiber powder with a particle size of 0.8 mm and a bulk density of 1.75 g / cm through a 150 mesh sieve and a bulk density of 480 g / L 3 Add 13 parts of polycrystalline graphite powder into the high-speed dispersing mixer to disperse and stir, and control the vacuum degree to 0.095MPa during the stirring process of the high-speed dispersing mixer, control the stirring temperature to 100°C, control the stirring time to 140min, control the stirring speed to 400rpm, and cool to After normal temperature, it is transferred t...

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Abstract

Belonging to the technical field of conductive adhesive, the invention provides a single-component silicone conductive silver adhesive and a preparation method thereof. The method consists of: by weight, putting the weighed 60-75 parts of alpha, omega-dihydroxy polydimethyl siloxane, 10-15 parts of a diluents, 95-105 parts of silver powder, 8-15 parts of carbon fiber and 12-15 parts of graphite powder into a stirrer to conduct stirring, then performing discharging and cooling to room temperature, then transferring the mixture into a grinder to conduct grinding, and controlling the grinding fineness to obtain a base material; putting the obtained base material into a stirrer, adding 3.5-5.5 parts of a crosslinking agent, 1-2 parts of a coupling agent and 1-3 parts of a catalyst into the stirrer to conduct stirring, then carrying out discharging and filling, thus obtaining the single-component silicone conductive silver adhesive. The single-component silicone conductive silver adhesive is convenient for storage and transportation and saves the logistics cost, meets the requirements of industrial production lines, can satisfy the use requirements of spaceflight, aviation and military products, and has the advantages of convenient and efficient construction, environmental friendliness and simple process.

Description

technical field [0001] The invention belongs to the technical field of conductive adhesives, in particular to a single-component silicone conductive silver adhesive, and also relates to a preparation method thereof. Background technique [0002] Most of the conductive silver glues in the prior art are based on epoxy resin and add silver powder etc., typically as CN1227320C (weather resistant epoxy conductive adhesive), CN1247729C (single-component room temperature curing soft elastic epoxy conductive silver glue), CN1939999A (silver powder conductive adhesive and preparation method thereof), CN102925110B (conductive silver adhesive with high thermal conductivity and preparation method thereof), and CN102634312A (silver-plated powder conductive adhesive for LED packaging and preparation method thereof), etc. The aforementioned CN1247729C is cured at room temperature for 24 hours (line 5 on page 3 of the instruction manual), but cannot be stored; the aforementioned CN1939999A ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/06C09J9/02C09J11/06C09J11/08
CPCC08L2201/08C09J9/02C09J11/06C09J11/08C09J183/06C09J183/04C08K13/04C08K7/18C08K7/06C08K3/04
Inventor 王晓岚费志刚祝金涛
Owner 江苏明昊新材料科技股份有限公司
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