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A kind of oily conductive silver paste and preparation method thereof

A conductive silver paste, oily technology, applied in the direction of cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problem of large volume resistance of silver paste, and achieve favorable and process operation, volatility The effect of small, large amount of filler

Active Publication Date: 2018-04-10
合肥微晶材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The nano-silver conductive silver paste disclosed in Chinese patent CN104464887A contains 28-32wt% conductive silver wire, 25-40wt% resin, 20-30wt% organic solvent, 1-10wt% glass powder and 1-10wt% additive. Water bath heating and stirring are required during preparation, and the volume resistance of the obtained silver paste is relatively large

Method used

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  • A kind of oily conductive silver paste and preparation method thereof
  • A kind of oily conductive silver paste and preparation method thereof
  • A kind of oily conductive silver paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The oily conductive silver paste of the present embodiment is prepared according to the following steps:

[0027] a, 40g epoxy resin and 20g dibasic acid ester are mixed 30min in high shear machine, obtain mixed solution A;

[0028] b. Add 10g of silver nanowires and 2g of dispersant carboxymethylpropyl cellulose into the mixed solution A, and perform vacuum defoaming and mixing in a vacuum mixer to obtain the mixed solution B;

[0029] c. Stir 30g of silver powder and 20g of polyurethane resin in a vacuum mixer for 30 minutes to obtain a mixture C; wherein the silver powder is formed by mixing 10g of flake silver powder and 20g of spherical silver powder.

[0030] d. Add 1 g of phthalic anhydride to the mixture C, stir in a vacuum mixer for 30 minutes, and then filter through a 250-mesh mesh cloth to obtain an oily conductive silver paste.

Embodiment 2～7

[0032] After adjusting the raw materials and their quality in Example 1 according to Table 1, carry out Examples 2-7 in the same manner.

[0033] Wherein, the curing agent used in Examples 2-6 is phthalic anhydride, and the curing agent used in Example 7 is trimellitic anhydride.

[0034] The raw material composition of each embodiment conductive silver paste of table 1

[0035]

[0036] The conductive silver paste prepared by the above-mentioned embodiment is carried out performance test:

[0037] Electrical performance test: use a square resistance meter to test the resistance;

[0038] Adhesion test: 3M600 tape is used to pull vertically, and it does not fall off after two consecutive pulls;

[0039] Hardness Testing;

[0040] Aging resistance test: Set the temperature at 65°C, humidity at 90% RH, and hold time at 96 hours. The test resistance change before and after aging resistance is defined as good within 10%, and it is defined as poor if it exceeds.

[0041] The...

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Abstract

The invention discloses an oily conductive silver paste and a preparation method therefor. The silver paste comprises the following raw materials by weight: 10-30 parts of silver powder, 5-15 parts of silver nanowires, 20-40 parts of epoxy resin, 20-40 parts of dibasic esters, 10-20 parts of polyurethane, 0.1-2 parts of dispersing agent and 0.1-2 parts of anhydride-type curing agent, wherein the silver powder is formed by the mixing of flake-shaped silver powder and spherical silver powder according to a ratio: 1: 1-5. The conductive silver paste is formed by the complex formulation of silver powder and silver nanowires, reduces the consumption of conductive filling materials, improves the conductive performance of the material, reduces the consumption of silver, and reduced the production cost.

Description

technical field [0001] The invention relates to the technical field of conductive silver paste, in particular to an oily conductive silver paste and a preparation method thereof. Background technique [0002] In the development of information technology, conductive silver paste plays a vital role. The general conductive silver paste mainly contains various functional fillers such as conductive fillers (such as copper, aluminum, silver metal powder), inorganic filler glass powder, oxide powder, organic binder, curing agent, etc., and the silver content is 80-90 %. From a theoretical point of view, the higher the silver content, the better the conductive effect of the conductive silver paste; but from the perspective of actual production, since silver is a precious metal, the less silver content in the filler, the lower the production cost. [0003] The nano-silver conductive silver paste disclosed in Chinese patent CN104464887A contains 28-32wt% conductive silver wire, 25-4...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22H01B13/00
CPCH01B1/22H01B13/00
Inventor 吕鹏张梓晗陶豹
Owner 合肥微晶材料科技有限公司
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