NOW AVALIABLE IN AEROSOL FORMAT!

The 843 Silver Coated Copper Conductive Coating is a highly conductive acrylic paint designed to reduce electromagnetic or radio frequency interference (EMI/RFI). Long-term protection from EMI/RFI is assured by its durable acrylic resin that minimizes loss of metallization through rubbing, and by the oxidation resistant silver that slows down conductivity degradation with age. In addition, loss of shielding through paint peeling is unlikely since the acrylic resin system was shown, in UL related testing, to adhere to even difficult substrates like ABS and polycarbonates.

• High Conductivity—Low Surface resistivity of 0.21 Ω/sq for one coat (1.0 mil)
• Tough and durable coating
• Rub off resistant
• Corrosion resistant coating
• Stronger adhesion than water based coatings
• Low VOC’s
• Median attenuation 60 dB ±18 dB per 25.4 μm (~1.0 mil) for frequency range of 10 MHz to 18 GHz

Applications & Usages:

Its primary application is to provide a reasonable cost, high-conductivity EMI/RFI shielding. It may also act as a conductive base for low temperature electroplating processes or for any other manufacturing processes where it is necessary to impart conductivity to a surface. As well, the silvered copper powder is non-magnetic, offering a low relative permeability that provides reasonable skin depths, which makes it suitable for microwave transmissions applications.

Compatibility:

Chemical—The silver coated copper is quite resistant to oxidation, except in environments that contain contaminants like H2S or ozone which tarnish its surface.

The thermoplastic resin is dissolved by common paint solvents like toluene, xylene, acetone, and MEK. This allows great coating repair and work characteristics, but it does make the coating unsuitable for solvent rich environments.

Adhesion—The 843 coating adheres to most plastics used to house printed circuit assemblies; however, it is not compatible with contaminants like water, oil, and greasy flux residues that may affect adhesion. If contamination is present, clean the surface to be coated first.

Specifications

AEROSOL SPECIFICATIONS: Curing & Work Schedule Aerosol Liquid Dry to Touch (aerosol) 3 to 5 mins 3 to 5 mins Recoat time (aerosol) 2 mins 2 mins Full Cure at room temp. 24 hours 24 hours Full Cure at 65 °C 30 mins 30 mins Shelf Life 1 year 3 years Storage Temperature Limits -5 to 40 °C (23 to 104°F) -5 to 40 °C (23 to 104°F) Service Ranges Aerosol Liquid Service Temperature -40 to +120 °C (-40 to +248 °F) -40 to +120 °C (-40 to +248 °F) Maximum Coverage (per aerosol can) < 5,100 cm2 (< 1,590 in2)   Maximum Coverage (per 900mL)   < 148,000 cm2 (< 160 ft2) Maximum Coverage (per US gallon)   < 627,000 cm2 (< 675 ft2) Electric & Magnetic Properties - Cured Surface Resistance (Aerosol):   See Chart 1 × coat @ 1.0 mil   0.19 ohm/sq 2 × coats @ 2.0 mil   0.09 ohm/sq 3 × coats @ 3.0 mil   0.04 ohm/sq Surface Resistance (Liquid):   See Chart 1 × coat @ 0.8 mil   0.24 ohm/sq 2 × coats @ 1.5 mil   0.15 ohm/sq 3 × coats @ 2.2 mil   0.09 ohm/sq Magnetic Class   Diamagnetic (Non-magnetic) Relative Permeability   < 1.0 Shielding Attenuation: Frequency  Attenuation for 33 µm [1.0 mil]     IEEE STD 299-1997 10 to 100 kHz 58 dB to 78 dB   100 kHz to 1 MHz 54 dB to 65 dB   1 MHz to 10 MHz 53 dB to 56 dB   10 MHz to 100 MHz 47 dB to 56 dB   100 MHz to 1 GHz 42 dB to 65 dB   1 GHz to 10 GHz 42 dB to 56 dB   10 GHz to 18 GHz 48 dB to 62 dB Physical Properties - Cured Aerosol Liquid Resin technology Thermoplastic Thermoplastic Color Light brown Light brown Abrasion resistant Yes Yes Blister resistant Yes Yes Peeling resistant Yes Yes Water and salt spray resistant Yes Yes Physical Properties - Uncured Aerosol Liquid Color Brown Brown Density 1.4 g/m 1.70 g/mL Solids Percentage (wt/wt) ~41% ~64.5% Viscosity at 25 °C [77 °F] <3450 cP 3450 cP Let down ratio (Paint:Solvent)   1:1 Flash Point -16 °C [3.2 °F] -16 °C [3.2 °F] Odor Ethereal Ethereal

Available Sizes

Catalog Number Sizes Available Description 843-140G 140 g (5 oz) Aerosol 843-340G 340 g (12 oz) Aerosol 843-900ML 1.6 kg (0.24 gallon) Liquid - Bulk 843-1G 6.4 kg (1 gallon) Liquid - Bulk