DOWSIL CC-3122

Harmonization Code : 8473.30.80.00 | Parts and accessories (other than covers, carrying cases and the like) suitable for use solely or principally with machines of headings 8470 to 8472 ; Parts and accessories of the machines of heading 8471 ; Other; Other

DOWSIL CC-3122

Main features

  • 80 mPa s Coating Viscosity
  • 6-Minute Tack-Free Time
  • No-Added-Solvent Coating

Product Description

DOWSIL CC-3122 Conformal Coating is a one-part, translucent, moisture-cure silicone conformal coating for printed circuit board assemblies. Typical viscosity is 80 mPa s, with dip and spray listed as application methods, and the coating reaches a tack-free condition in 6 minutes at 50% RH. The formulation contains no added solvent and includes a UV indicator. After cure, the material has a typical hardness of 75 Shore A. It is used for environmental, corrosion, and dielectric protection of PCBAs and for thin-section encapsulation and protection of electronic assemblies.

Key features

  • Coating viscosity: Typical viscosity is 80 mPa s; listed application methods are dip and spray.
  • Humidity-conditioned tack-free time: Tack-free time is 6 minutes at 50% RH.
  • UV inspection indicator: The translucent coating contains a built-in visual aid for post-application inspection.

Applications

Environmental, corrosion, and dielectric protection of PCBAs; thin-section encapsulation and protection of electronic assemblies.

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Translucent
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.03
Physical Properties
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow. Viscosity is commonly measured in centiPoise (cP). One cP is defined as the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP. A product like honey would have a much higher viscosity -around 10,000 cPs- compared to water. As a result, honey would flow much slower out of a tipped glass than water would. The viscosity of a material can be decreased with an increase in temperature in order to better suit an application
80 mPa.s
Electrical Properties
Dielectric Strength
Dielectric strength is measured in kV per mm and is calculated by the Breakdown voltage divided by the thickness of the tested material. Those two properties go hand in hand and while Breakdown voltage is always thickness dependent, dielectric strength is a general material property. As an example, the dielectric strength of Polyimide is 236 kV/mm. If we place 1mm of Polyimide between two electrodes, it will act as an insulator until the voltage between the electrodes reaches 236 kV. At this point it will start acting as a good conductor, causing sparks, potential punctures and current flow.
32 kV/mm
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
2.3 X 10¹⁶ Ohms⋅cm

Additional Information

Technical properties

Before-processing coating properties

PropertyValueUnitMethod / condition
Viscosity80mPa sTypical
Tack-free time6min50% relative humidity
Solvent addedNoAs supplied
Application methodDip; Spray

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