PCS Parylene C, Poly (P-Xylylene)
Monomer is monochloro para-xylylene. Parylene C is recommended where where excellent barrier protection is needed. It can be used up to 125°C where oxygen is present.
Parylene is a generic name for poly-para-xylylene polymers used as conformal coatings in protective applications.
The coating process exposes objects to the gas-phase monomer at low pressure. Through vacuum deposition, Parylene condenses on the surface in a polycrystalline fashion, providing a coating that is truly conformal and pinhole free.
Compared to liquid processes, the effects of gravity and surface tension are negligible -- so there is no bridging, thin-out, pinholes, puddling, run-off or sagging. And, since the process takes place at room temperature, there is no thermal or mechanical stress on the object.
Parylene is physically stable and chemically inert within its usable temperature range. Parylene provides excellent protection from moisture, salt spray, corrosive vapors, solvents, airborne contaminants and other hostile environments.
Property data obtained following ASTM methods. Information provided by Parylene Coating Services, Inc. (PCS)
- Water Absorption
- Moisture Vapor Transmission
- Oxygen Transmission
- Nitrogen Transmission
- Carbon Dioxide Transmission
- Hydrogen Sulfide Transmission
- Sulfur Dioxide Transmission
- Chlorine Transmission
- Tensile Strength, Ultimate
- Tensile Strength, Yield
- Elongation at Break
- Elongation at Yield
- Tensile Modulus
- Coefficient of Friction
- Coefficient of Friction, Static
- Volume Resistivity
- Surface Resistance
- Dielectric Constant
- Dielectric Constant, Low Frequency
- Dielectric Strength
- Dissipation Factor
- Dissipation Factor, Low Frequency
- CTE, linear 20°C
- Thermal Conductivity
- Melting Point
- Maximum Service Temperature, Air
- Refractive Index
- Transmission, Visible
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