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DESCRIPTION:

50-2366 FR is a new thermally conductive polyurethane potting compound. This flexible system is designed for low stress on sensitive components during and after cure. 50-2366 FR polyurethane resin system is formulated for applications requiring low exotherm, low shrinkage, and excellent electrical properties.

This system is a good choice for potting applications containing surface mount components or any application requiring low stress, thermal conductivity and flame retardancy. 50-2366 FR is suitable for outdoor use.

50-2366 FR meets the stringent requirements of UL 94V0 flame out test.

FEATURES:

• Low viscosity
• Low stress on sensitive components
• Excellent electrical insulation
• Excellent water resistance
• Low shrinkage
• Thermal shock resistance
• Thermally conductive
• Flame retardant

TYPICAL SPECIFICATIONS:

• Standard Color - Black
• Viscosity, CPS

• Part A Polyol - 17,000
• Part B Isocyanate - 150
• Specific Gravity, 25°C

• Part A Polyol - 1.56
• Part B Isocyanate - 1.21
• Hardness, Shore D - 65
• Tensile strength, Psi - 2,200
• Elongation, % - 35
• Thermal Shock, - ^-65°C to + 130°C Passes
• Linear shrinkage, % - 0.5
• Linear Thermal Expansion, in/in/°C - 16.2 x 10^-5
• Thermal conductivity, BTU/hr/ft²/°F/in - 8
• Water Absorption, %

• 24 hours immersion - 0.074
• 7 days immersion - 0.18
• Fungus Resistant - Non – Nutrient
• Dielectric constant, 100 HZ - 4.3
• Dielectric Strength, Volts/mil - 540
• Volume Resistivity, ohm-cm - 2.1 x 10¹⁴
• Surface Resistivity, ohms - 6.0 x 10¹⁷
• Operating temperature range, °C - -65 to + 135°C

INSTRUCTIONS FOR USE:

1) Agitate Part A thoroughly to re-disperse fillers. Some settling during transit or storage is common.

2) By weight mix 100 parts 50-2366 FR Part A to 20 parts Part B. By volume 100 Parts A to 26 Parts B. Avoid using paper cups & wooden stirrers. Use glass or metal containers and stirrers.

3) Pour and cure according to one of the following schedules:

A. 25°C - 24 hours

B. 60°C - 2 hours

C. 100°C - 20-30 minutes

STORAGE & HANDLING:

50-2366 FR should be stored at 65 – 85°F in original tightly sealed containers. If containers are opened and the contents partially used, the material left in the container should be blanketed with dry nitrogen before sealing. Expected shelf life is 12 months in original unopened containers.

50-2366 FR does not contain TDI or MOCA. It also has a low vapor pressure which greatly reduces the vapor hazard and toxicity associated with other commercially available urethanes.

Please read MSDS before using this or any other chemical.

IMPORTANT:

The information in this brochure is based on data obtained by our own research and is considered accurate. However, no warranty is expressed or implied regarding the accuracy of these data, the results to be obtained from the use thereof, or that any such use will not infringe any patent. This information is furnished upon the condition that the person receiving it shall make his own tests to determine the suitability thereof for his particular purpose.

06/03