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Water based conductive coating

A conductive coating, water-based technology, applied in the field of water-based polyurethane silver powder conductive coatings, water-based polyurethane silver powder conductive coatings, can solve problems such as failing to achieve an ideal situation

Active Publication Date: 2008-01-23
SHANGHAI PLASTICS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Prior art JP6346006 (1994.12.20) and JP8003486 (1996.1.9) all are water-based conductive coatings utilizing copper powder system, although they have improved the shortcomings of copper powder conductive coatings, they still fail to reach the ideal situation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 88.7g of silver powder with a particle size of 0.2 to 10μm to a solution containing 40g of deionized water, 7.15g of N-methylpyrrolidone, 2.86g of BYK  -307, 4.29g of propylene glycol monobutyl ether and 2.29g of polyethylene paraffin was vigorously stirred for 45 minutes, then 3.15g of Polyphobe was added TR-115 and 51.5g Solucote 1736CA, continued to stir vigorously for 60 minutes to prepare a water-based conductive coating. The solid content of the obtained conductive paint was 55.2%, and the silver content was 44.0%. The volume resistivity of the conductive coating obtained after baking at 60-80°C for 20-30 minutes after 24 hours is 9×10 -4 Ω.cm.

Embodiment 2

[0027] Add 86.05g of flake silver powder to 32.64g of deionized water, 4.0g of Rhoplex  NT-2624, 4.45g dimethylacetamide, 1.48g BYK  -348, 1.19 g of 2,2,4-trimethyl-1,3-pentanediol isobutyrate, 1.19 g of polypropylene paraffin was vigorously stirred for 1 hour. Then add 16.77g QW-32 and 1.63g Polyphobe  TR-115, continue stirring for 60 minutes to obtain a water-based conductive coating. The solid content of the obtained conductive paint was 64.7%, and the silver content was 57.0%. The volume resistivity of the conductive coating obtained after baking at 60-80°C for 20-30 minutes after 24 hours is 3×10 -5 Ω.cm.

Embodiment 3

[0029] Add 29g flake silver powder and 23g spherical silver powder to the  -348, 0.59g BYK  -028, a mixture of 3.40 g of dipropylene glycol monomethyl ether and 1.36 g of pasty beeswax was vigorously stirred for 60 minutes, then 1.25 g of Acrysol was added  RM-8 and 15.86 g of ER-05 waterborne polyurethane dispersion, followed by stirring for 60 minutes, produced a waterborne conductive coating. The solid content of the obtained conductive paint was 60%, and the silver content was 52.0%. The volume resistivity of the conductive coating obtained after baking at 60-80°C for 20-30 minutes after 24 hours is 4×10 -4 Ω.cm.

[0030] Make water-based conductive paint by embodiment 1 of the present invention, embodiment 2 and embodiment 3, the volume resistivity of its coating film is 3 * 10 -5 ~1×10 -3 Ω.cm, surface resistivity ≤0.2Ω (thickness 15~30μm), adhesion level 0, shielding effectiveness 65~75dB (30MHz~1.5GHz, ASTM D4935-99), baking temperature and time: 60~80℃ / 20-30...

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Abstract

An electrically conductive water-based paint is prepared through proportionally adding silver powder to the mixture of water disperser containing anionic polyurethone, deionized water, cosolvent, wetting agent, filming agent and suspending agent, stirring, adding thickening agent, and stirring. Its paint layer is baked at 50-80 deg.C for 20-30 min. Its advantages are high electric conductivity, high shielding power and high adhesion.

Description

(1) Technical field [0001] The invention relates to a water-based conductive paint, more precisely the invention relates to a water-based polyurethane silver powder conductive paint, also known as water-based polyurethane silver powder conductive paint. (2) Background technology [0002] With the rapid development of electronization and informatization, electronic machines with built-in information micro-processing devices are widely popularized, and the problems of electromagnetic compatibility (EMC), information security and noise pollution are becoming more and more serious. Radio frequency interference or electromagnetic interference can lead to civil aviation take-off and landing system failure, poor communication, computer operation error or automatic control equipment malfunction, etc., and even endanger personal safety. In recent years, with the increasing popularity of mobile phones, reports that mobile phones can induce brain tumors and deformed fetuses have appear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/24
Inventor 吴存雷孔德全
Owner SHANGHAI PLASTICS RES INST CO LTD