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Light-cure conformal coatings cure tack-free in seconds upon exposure to UV/Visible or LED light and feature secondary heat or moisture-cure capability for shadow areas on PCBs. They protect printed circuit boards and components from extreme environmental conditions such as heat, chemicals, and humidity.

  • UV/Visible/LED light cure in seconds
  • Multi-Cure and Dual-Cure products (secondary heat or moisture cure)
  • High visibility fluorescence for inline Q.C.
  • One-part formulations, no solvents added
  • IPC and MIL SPEC approvals; some meet NASA ASTM E595 Low Outgassing
  • Flexible and rigid bonds to FPB and PCB substrates
  • Temperature/humidity resistance
  • Black coatings to hide sensitive circuitry
Unit of Measure

Specifications

Brands

 N/A Dymax®

Uncured Properties

Solvent Content

N/A No Nonreactive Solvents

Chemical Class

N/A Acrylated Urethane

Uncured Appearance

 N/A Clear Light Yellow Liquid

Soluble in

N/A Organic Solvents

Density

 N/A 1.08 g/ml

Test Method for Density

 N/A American Society for Testing and Materials (ASTM D1875)

Nominal Viscosity

 N/A 820 cP

Test Method for Nominal Viscosity at 20 Revolutions Per Minute (rpm) Speed

 N/A Dymax® Standard Test Method (DSTM 502)

Shelf Life at Room Temperature (RT) (22 to 25 Degree Celsius (ºC)) Temperature from Date of Manufacture

 N/A 7 months

Cured Mechanical Properties

Durometer Hardness (Ultraviolet (UV) Only)

 N/A A62

Test Method for Durometer Hardness (Ultraviolet (UV) Only)

 N/A American Society for Testing and Materials (ASTM D2240)

Durometer Hardness

 N/A D72

Test Method for Durometer Hardness

 N/A American Society for Testing and Materials (ASTM D2240)

Tensile at Break

 N/A 20.4 MPa2,952 psi

Test Method for Tensile at Break

 N/A American Society for Testing and Materials (ASTM D638)

Elongation at Break

 N/A 13 %

Test Method for Elongation at Break

 N/A American Society for Testing and Materials (ASTM D638)

Modulus of Elasticity

 N/A 910.3 MPa132,026 psi

Test Method for Modulus of Elasticity

 N/A American Society for Testing and Materials (ASTM D638)

Other Cured Properties

Glass Transition Temperature (Tg)

 N/A 86 ºC

Test Method for Glass Transition Temperature (Tg)

 N/A American Society for Testing and Materials (ASTM D5418)

Coefficient of Thermal Expansion (CTEα1)

 N/A 108 µm/m/ºC

Test Method for Coefficient of Thermal Expansion (CTEα1)

 N/A American Society for Testing and Materials (ASTM E831)

Coefficient of Thermal Expansion (CTEα2)

 N/A 191 µm/m/ºC

Test Method for Coefficient of Thermal Expansion (CTEα2)

 N/A American Society for Testing and Materials (ASTM E831)

Refractive Index at 20 Degree Celsius (ºC) Temperature

 N/A 1.51

Test Method for Refractive Index at 20 Degree Celsius (ºC) Temperature

 N/A American Society for Testing and Materials (ASTM D542)

Boiling Water Absorption (2 Hours (h))

 N/A 1.16 %

Test Method for Boiling Water Absorption (2 Hours (h))

 N/A American Society for Testing and Materials (ASTM D570)

Water Absorption (25 Degree Celsius (ºC) Temperature, 24 Hours (h))

 N/A 0.21 %

Test Method for Water Absorption (25 Degree Celsius (ºC) Temperature, 24 Hours (h))

 N/A American Society for Testing and Materials (ASTM D570)

Linear Shrinkage

 N/A 1.4 %

Test Method for Linear Shrinkage

 N/A American Society for Testing and Materials (ASTM D2566)

Volumetric Shrinkage

 N/A 4.5 %

Test Method for Volumetric Shrinkage

 N/A Dymax® Standard Test Method (DSTM 6114)

Outgassing - Total Mass Loss (TML)

 N/A 0.90 %

Test Method for Outgassing - Total Mass Loss (TML)

 N/A American Society for Testing and Materials (ASTM E595)

Outgassing - Collected Volatile Condensable Material (CVCM)

 N/A 0.02 %

Test Method for Outgassing - Collected Volatile Condensable Material (CVCM)

 N/A American Society for Testing and Materials (ASTM E595)

Thermal Shock (-65 to 125 Degree Celsius (ºC)) Temperature

 N/A Pending

Test Method for Thermal Shock (-65 to 125 Degree Celsius (ºC)) Temperature

 N/A Military Standard (MIL-I-46058C)

Moisture Resistance

 N/A Pending

Test Method for Moisture Resistance

 N/A Military Standard (MIL-I-46058C)

Fungus Resistance (American Society for Testing and Materials (ASTM G21-13))

 N/A Pending

Test Method for Fungus Resistance (American Society for Testing and Materials (ASTM G21-13))

 N/A Military Standard (MIL-I-46058C)

Ionic Content

 N/A Passes

Test Method for Ionic Content

 N/A Military Standard (MIL-STD-883) Method 5011

Specific Electrical Conductance

 N/A 2.6 µS/cm

Test Method for Specific Electrical Conductance

 N/A Military Standard (MIL-STD-883) Method 5011

Concentration of Hydrogen

 N/A 4.5 pH

Test Method for Concentration of Hydrogen

 N/A Military Standard (MIL-STD-883) Method 5011

Sequential Environmental Testing (Thermal Shock (15 Cycles) + Cycle (100 Cycles))

 N/A Passes

Test Method for Sequential Environmental Testing (Thermal Shock (15 Cycles) + Cycle (100 Cycles))

 N/A Military Standard (MIL-STD-883) Method 5011

Electrical Properties

Dielectric Constant at 1 Megahertz (MHz) Frequency

 N/A 4.29

Test Method for Dielectric Constant at 1 Megahertz (MHz) Frequency

 N/A American Society for Testing and Materials (ASTM D150)

Dissipation Factor at 1 Megahertz (MHz) Frequency

 N/A 0.0287

Test Method for Dissipation Factor at 1 Megahertz (MHz) Frequency

 N/A American Society for Testing and Materials (ASTM D150)

Dielectric Breakdown Voltage

 N/A 26,320 V

Test Method for Dielectric Breakdown Voltage

 N/A American Society for Testing and Materials (ASTM D149)

Dielectric Strength

 N/A 665 V/mil

Test Method for Dielectric Strength

 N/A American Society for Testing and Materials (ASTM D149)

Surface Resistivity

 N/A 2.23e+13 O

Test Method for Surface Resistivity

 N/A American Society for Testing and Materials (ASTM D257)

Volume Resistivity

 N/A 3.48e+14 O·cm

Test Method for Volume Resistivity

 N/A American Society for Testing and Materials (ASTM D257)

Recommended Adhesives

Recommended Adhesives

 N/A Ceramic (CER) Common Solder Masks Flame Retardant (FR-4) Flex Circuit (Polyimide) Lead Frame Printed Circuit Board (PCB) Silicone (SIL)

Other Features

N/A

  • Mil Std 883 Method 5011 Compliant
  • UL 94V-0 Flammability
  • UL 746-E Recognized
  • Meets ASTM E595 Low Outgassing
  • MIL-I-46058C -- Pending
  • Meets IPC-CC-830-B -- Pending

Applications

N/A Conformal Coating for Critical PCBs in Missiles, Satellites, and Spacecraft

Additional Information

N/A Dymax® 9771 is engineered for coating thicknesses up to 0.203 mm (0.008 in). This conformal coating fluoresces a vivid blue when exposed to UV light (365 nm) for easy inspection of coating coverage. Dymax® conformal coating materials contain no nonreactive solvents and cure upon exposure to light. Their ability to cure in seconds enables faster processing, greater output, and lower processing costs. When cured with Dymax® light-curing spot lamps, focused-beam lamps, or flood lamps, they deliver optimum speed and performance for PCB assembly. Dymax® lamps offer the ideal balance of UV and visible light for the fastest, deepest cures. Properties below unless specified were measured after full light + moisture cure.

Features

N/A

  • UV/Visible Light Cure
  • Secondary Moisture Cure
  • Bright Blue Fluorescing
  • Low Ionic Content Compliance with Mil Std 883 Method 5011
  • Temperature/Humidity Resistance
  • Corrosion Resistance