Waterborne conductive ink and preparation method thereof

A conductive ink and water-based technology, applied in the field of electronic chemicals, can solve the problems of large particle size of graphite, poor conductivity of conductive ink, unable to meet the requirements of conductivity, achieve good conductivity, solve labor protection and environmental pollution, Strong binding effect

Inactive Publication Date: 2013-05-01
SUZHOU NIUJIAN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size of graphite is large, and due to the orientation of graphite, the resistivity in the direction parallel to the crystal layer is (2.5~5.0)×10-6 Ω·m, and the resistivity in the direction perpendicular to the layer i

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] components Example 1 polymer emulsion or dispersion Water-based pure acrylic emulsion 10% Cellulose Hydroxypropyl Cellulose 0.68% Dispersant Anionic polyacrylate ammonium salt 0.55% D Anionic water-soluble copolymer 0.33% fungicide Broad-spectrum fungicide (does not contain formaldehyde) 0.28% Defoamer 0.35% conductive material Spherical copper powder 56% Coalescent (Lauryl alcohol ester) 1% thickener 0.81% water 30%

[0047] Weigh the raw materials of each component according to the mass percentage of each component in Table 1, add water into the mixing tank, and then add dispersant, wetting agent and fiber to the mixing tank at a stirring speed of 500 rpm. factor, defoamer and spherical copper powder, and then disperse at a speed of 1500 rpm for 60 minutes until the fineness is less than 15 microns. Continue to add water-based pure acrylic emulsion, lauryl alcohol ester film-forming ...

Embodiment 2

[0053] components Example 2 polymer emulsion or dispersion Water-based phenylacrylic acid emulsion 12% Cellulose Hydroxyethylcellulose 0.55% Dispersant Anionic polyacrylate ammonium salt 0.7% D Anionic water-soluble copolymer 0.31% fungicide Broad-spectrum fungicide (does not contain formaldehyde) 0.3% Defoamer 0.20% conductive material Spherical silver-clad copper powder 55% Coalescent (Lauryl alcohol ester) 0.9% thickener 0.35% water 29.69%

[0054] Disperse each component according to the preparation method described in Example 1 to obtain a water-based conductive ink. The technical indicators of the water-based conductive ink prepared in Example 2 (specifically low-cost silver-clad copper powder acrylic acid environmental conductive ink) are shown in Table 2:

[0055] Table 2: Technical indicators of low-cost silver-coated copper powder acrylic environmentally friendly conductive ink

[...

Embodiment 3

[0059] components Example 3 polymer emulsion or dispersion Polyvinyl alcohol (PVA) aqueous solution 23% Dispersant 0.40% D 1.20% Defoamer 0.30% conductive material Flake silver-plated nickel powder 58% Coalescent (boric acid) 0.7% thickener 1.30% water 15.10%

[0060] Disperse each component according to the preparation method described in Example 1 to obtain a water-based conductive ink. Among them, boric acid is used as a crosslinking agent.

[0061] The water-based conductive ink that embodiment 3 prepares (being specifically the technical index of low-cost flake silver-plated nickel powder PVA-based environmental protection conductive ink is as shown in table 3:

[0062] Table 3: Low-cost flaky silver-plated nickel powder PVA-based environmentally friendly conductive ink technical indicators

[0063] index parameter value Fineness (μm) 12.5 Coating Thickness (μm) 12 hardnes...

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Abstract

The invention relates to waterborne conductive ink which comprises the following components in percentage by weight: 1-40 percent of polymer emulsion or dispersion liquid, 0.1-0.7 percent of dispersant, 0.1-0.3 percent of wetting agent, 0.2-1.8 percent of defoaming agent, 30-70 percent of conductive material, 0.5-3 percent of film-forming addition agent and 5-60 percent of water. The waterborne conductive ink disclosed by the invention has the advantages of no toxicity or odor, safety, environment friendliness, convenience in use, resource economization, favorable film forming performance and printing performance of ink, strong adhesive force and good weather resistance; the defects of toxicity, harm, inflammability and explosiveness of solvent ink are overcome; and water replaces organic solvent, so that a volatile organic compound (VOC) is reduced, and the production cost is also reduced.

Description

[0001] technical field [0002] The invention relates to a low-cost conductive ink, in particular to a low-cost, low-VOC, solvent-free, lead-free, halogen-free, green and environmentally friendly water-based conductive ink and a preparation method thereof, belonging to the technical field of electronic chemicals. Background technique [0003] Conductive ink (mainly refers to mixed conductive composite ink) conducts current by means of conductive materials dispersed in the ink carrier. Solvent-based inks have been around for nearly a century. The solvents used in traditional solvent-based inks are volatile organic compounds (Volatile Organic Compounds, VOC for short), which account for a large proportion of air pollution sources. Moreover, the long-term use of solvent-based inks not only endangers the health of operators and users, but also causes a lot of environmental pollution, and often causes accidents such as poisoning and explosions, which has become one of the key saf...

Claims

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Application Information

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IPC IPC(8): C09D11/10C09D11/14C09D11/52
Inventor 吴卫平施红华
Owner SUZHOU NIUJIAN NEW MATERIAL
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