Conductive ink and preparation method thereof

A conductive ink, mass percentage technology, used in inks, household appliances, applications, etc., can solve problems such as inability to apply in high-conductivity fields, inapplicable in high-end fields, and increase in paste square resistance, achieving good compactness and electrical conductivity. , The effect of reducing the square resistance of the paste

Inactive Publication Date: 2010-04-21
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing carbon silver paste, because the resistivity of carbon powder is much higher than that of silver powder, the square resistance of the paste after mixing is greatly increased, and it cannot be applied in some high-end fields, especially those requiring high conductivity like membrane switches and notebook keyboards. field cannot be applied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] The above-mentioned preparation method of conductive ink includes the following steps:

[0039] (1) Organic carrier A: Weigh 65-75% by mass of one of diethyl adipate or ethylene glycol butyl ether acetate and 25-35% by mass of polyester resin or acrylic One of the similar resins, stirring at high speed in a water bath, so that the resin is completely dissolved in the solvent;

[0040] (2) Organic Carrier B: Weigh 62-77% of 1,4-butyrolactone or terpineol with a mass percentage of 22-38% of vinyl acetate resin, and put it in a water bath at high speed Stir to make the resin completely dissolve in the solvent, add a coupling agent of 0.05%-1% by mass, and stir at high speed to prepare;

[0041] (3) Preparation of carbon silver paste:

[0042] Weigh the proportion of carbon powder and organic carrier A, mix them thoroughly, and then use a three-roll mill to grind and disperse to form a uniform mixed phase to obtain a carbon slurry;

[0043] Weigh the silver powder, nickel powder an...

Embodiment 1

[0053] Organic Carrier A:

[0054] Weigh 101.35 grams of diethyl adipate and 43.5 grams of polyester resin, and place them in a 70-100°C water bath and stir at high speed for 2 hours to completely dissolve the polyester resin in the diethyl adipate.

[0055] Organic carrier B:

[0056] Weigh 202.70 grams of 1,4-butyrolactone and 87.0 grams of vinyl acetate resin, mix the 1,4-butyrolactone and vinyl acetate resin, and place them in a 70-100°C water bath. Stir at high speed for 2 hours to make Vinyl resin is completely dissolved in 1,4-butyrolactone. Add 0.15 g of silane coupling agent KH-551 and stir at high speed for 20 minutes.

[0057] Weigh the material according to the following ratio

[0058] Toner 5g

[0059] Organic Carrier A 25g

[0060] Piece of silver 260 grams

[0061] Nickel powder 4.5g

[0062] Organic Carrier B 205g

[0063] DA type dispersant SN-5040 0.5 g

[0064] The carbon powder, the organic carrier A, and the weighed material are thoroughly mixed, and then grind and disp...

Embodiment 2

[0067] Organic Carrier A:

[0068] Weigh 101.35 grams of ethylene glycol butyl ether acetate and 43.5 grams of polyester resin, and place them in a 70-100°C water bath and stir at high speed for 2 hours to completely dissolve the polyester resin in ethylene glycol butyl ether acetate .

[0069] Organic carrier B:

[0070] Weigh 202.70 grams of 1,4-butyrolactone and 87.0 grams of vinyl acetate resin, mix the 1,4-butyrolactone and vinyl acetate resin, and place them in a 70-100°C water bath. Stir at high speed for 2 hours to make Vinyl resin is completely dissolved in 1,4-butyrolactone. Add 0.15 g of silane coupling agent KH-551 and stir at high speed for 20 minutes.

[0071] Weigh the material according to the following ratio

[0072] Toner 5g

[0073] Organic Carrier A 25g

[0074] Flake silver 265g

[0075] Nickel powder 4.5g

[0076] Organic Carrier B 200g

[0077] DA type dispersant SN-5040 0.5 g

[0078] The carbon powder, the organic carrier A, and the weighed material are thoroughly ...

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Abstract

The invention discloses conductive ink and a preparation method thereof. The conductive ink consists of the following components in percentage by mass: 1 to 2 percent of carbon powder, 3 to 5 percent of organic carrier A, 50 to 65 percent of sheet silver, 0.5 to 1 percent of nickel powder, 30 to 45 percent of organic carrier B, and 0.1 to 0.2 percent of dispersant, wherein the organic carrier A is formed by completely dissolving diethyl adipate or 2-butoxyethyl acetate with mass percentage of between 65 and 75 percent with polyester resins or acrylic resins with mass percentage of between 25 and 35 percent; and the organic carrier B is formed by completely dissolving 1,4-butyrolactone or terpineol with mass percentage of between 62 and 77 percent with a chloride-vinyl acetate resin with mass percentage of between 22 and 38 percent, and then adding a coupling agent with mass percentage of between 0.05 and 1 percent into the mixture. Compared with the prior carbon-silver paste, the carbon powder of the conductive ink is combined with paste better, carbon-silver paste is more compact, and the conductance is better when the compactness is better.

Description

Technical field: [0001] The invention belongs to the technical field of electronic materials, and specifically refers to a carbon-silver conductive ink with excellent conductivity suitable for use on flexible circuits and a preparation method thereof. Background technique: [0002] The conductive ink used on flexible circuits is made of ultrafine silver powder and low-temperature curing thermoplastic resin. It can be used above PET and PC. It is suitable for screen printing and has good printability, conductivity and oxidation resistance. , Hardness, expansion performance and strong adhesion, it is a functional material for the manufacture of electronic terminal products. It can be used for membrane switches, flexible printed circuits, and has been widely used in computer keyboards, notebook keyboards and home appliances such as microwave ovens and washing machines. Its performance is far superior to traditional circuit equipment, and it has the characteristics of environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/10C09D11/52
Inventor 姚函亮
Owner IRICO
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