Protective paint for retarding or preventing migration of conductive silver ions, preparation method and application thereof

A technology of protective coatings and ion migration, applied in polyester coatings, coatings, etc., can solve problems such as inability to answer affirmatively, achieve excellent barrier effect, improve the degree of compactness, and achieve the effect of good compactness

CN103031044AActive Publication Date: 2013-04-10张跃进 +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2013-04-10

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Abstract

The invention provides a protective paint for retarding or preventing migration of conductive silver ions. The protective paint is prepared from the following raw materials by weight part: 7-12 parts of sericite powder, 0-5 parts of graphite powder, 80-85 powder of polyester resin solution and 2-8 parts of dimethyl solvent. The invention also provides a preparation method and application of the protective paint. The protective paint has a variety of synergetic effects, can retard or prevent migration of conductive silver ions, prevents product performance from being reduced or lost due to resistance variation caused by the migration of silver ions, and is particularly suitable for occasions such as conductive silver paste or silver wires, silver electrodes, silver contacts and the like. In addition, metal or alloy materials for a conductive purpose besides metallic silver can also be used as suitable objects to be protected to achieve the same purpose.
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Description

technical field

[0001] This application relates to the technical field of electronic chemical materials, in particular to a protective coating that can delay or hinder ion migration of conductive metal materials when electrified. Background technique

[0002] Metal silver has the characteristics of low resistance, slow oxidation and its oxide is also conductive. The conductive silver paste products made of it have better conductivity than conductive copper paste and conductive carbon paste products, so its application is more extensive , including the following fields: (1) Membrane switches and flexible circuit boards based on PET (polyester); (2) Single-board ceramic capacitors; (3) Varistors and thermistors; (4) Piezoelectric ceramics ; (5) carbon film potentiometer; (6) far-infrared heating film and a series of derivative products that use far-infrared heating film as a heat source or radiation source. In addition, the conductive silver paste is coated on the film by scr...

Examples

Embodiment 1

[0034] HF-18483# polyester resin solution (solid content 50%, viscosity 1000-2000 centipoise); wet-process sericite powder, particle size ≤ 3 μm; solvent is DBE (dibasic acid ester mixture). Mixture composition ratio (weight ratio): 85.0 parts of polyester resin solution, 12.0 parts of wet-process sericite powder, and 3.0 parts of solvent.

[0035] Put the above-mentioned weighed components (total weight 1000.0 grams) in the 5L plastic tank equipped with the EA-ST208B ink mixer, first mix them by hand stirring, and then put the plastic tank in the ink mixer On the fixed seat, stir at a speed of 100rpm for 30 minutes to fully mix, take out the mixture and put it into a laboratory three-roller grinder to grind it twice, put the mixture in a special container, and place it at 25°C for 24 hours for later use.

Embodiment 2

[0037] HF-18483# polyester resin solution (solid content 50%, viscosity 1000-2000 centipoise); wet-process sericite powder, particle size ≤ 3 μm; ultra-fine graphite powder, particle size ≤ 0.5 μm, carbon content 99.99%; The solvent is DBE (dibasic acid ester mixture). Mixture composition ratio (weight ratio): 82.0 parts of polyester resin solution, 8.0 parts of wet-process sericite powder, 5.0 parts of ultrafine graphite powder, and 5.0 parts of solvent.

[0038] Put the above-mentioned weighed components (total weight 1000.0 grams) in the 5L plastic tank equipped with the EA-ST208B ink mixer, first mix them by hand stirring, and then put the plastic tank in the ink mixer On the fixed seat, stir at a speed of 100rpm for 60 minutes to fully mix, take out the mixture and put it into a laboratory three-roller grinder to grind it twice, put the mixture in a special container, and place it at 25°C for 24 hours for later use.

[0039] The manufacturability indexes of the protectiv...