Description
Two-Component Polyurethane Potting Compound & Encapsulant
CONATHANE® EN-1556 is an unfilled, two-component, room temperature curing, 100%-solids polyurethane system. It consists of CONATHANE® EN-1556 Part A Urethane Prepolymer and CONATHANE® EN1556 Curative.
Areas of Application
Polyether-based system primarily intended for use as a molding, encapsulating and potting compound for harness breakouts, watertight electrical connectors, cables, and cable end seals.
Other applications include casting and molding of mechanical parts and lining material for pumps, chutes, and conveyors requiring outstanding abrasion resistance.
Features and Benefits
- Conforms to MIL-M-24041C
- Excellent hydrolytic stability
- Thermal shock resistant
- Non-MbOCA curing system
- Excellent resistance to oils, gasoline, JP4 fuel, and seawater
- Non-nutrient for fungus
- Cartridge friendly 3:1 volumetric ratio
Application Methods
- Hand-mix Bench Potting / Casting
- Meter-mix Bench Potting / Casting
- Meter-mix Vacuum Potting / Casting
Typical Properties of Material as Supplied
| Property | Conditions | Value | Units | |
| CONATHANE® EN-1556 Part A Urethane Prepolymer |
CONATHANE® EN-1556 Part B Curative |
|||
| Viscosity | 25°C / 77°F | 18,000 | 3,000 | cP |
| Specific Gravity | 25°C / 77°F | 1.05 | 1.03 | |
| Appearance | Amber | Amber, Black | ||
| Mix Ratio | Pats by weight Parts by volume |
100 100 |
33 33 |
|
Typical Properties of Mixed Materials
| Property | Conditions | Value | Units |
| Viscosity (initial) | 25°C / 77°F | 10,040 | cP |
| Work Life (250,000 cP) | 2 lbs. @ 25°C / 77°F 2 lbs. @ 60°C / 140°F |
60 – 70 15 – 20 |
minutes minutes |
Typical Mechanical Properties
| Property | Test Method | Conditions | Value | Units |
| Appearance | Visual | 25°C / 77°F | amber or black | |
| Specific Gravity | ASTM D792 | 25°C / 77°F | 1.05 | |
| Shore Hardness | ASTM D2240 | 25°C / 77°F After 24 h @ 135°C / 275°F |
A 80 A 74 |
|
| Compression Set | ASTM D395 | Method B | 35 | % |
| Tensile Strength | ASTM D412 | 25°C / 77°F 300% modulus |
5,000 1,400 |
psi psi |
| Ultimate Elongation | ASTM D412 | 25°C / 77°F | 400 | % |
| Tear Strength | ASTM D624 | 25°C / 77°F | 200 | pli |
| Volumetric Shrinkage | MIL-M-24041C | 3.6 | % | |
| Moisture Absorbtion | MIL-M-24041C | 24 h @ 93°C / 200°F | 2.1 | % |
| Fungus Resistance | MIL-E-5272C | non-nutrient | ||
| Low-Temperature Flexibility | MIL-M-24041C | -54°C / -65°F | No blistering, cracking or loss of adhesion cycles | |
| Property degradation | Tensile strength after 2 weeks immersion in water @ 70°C / 158°F | 28.6 | % loss | |
| Peel Strength | Type 316 CRES primed with CONAP® AD-1146 Monel primed with CONAP® AD-1146 Neoprene primed with CONAP® PR-11167 PVC Primed with CONAP® AD-1161 |
> 150 > 145 > 30 >200 |
piw piw piw piw |
|
Typical Electrical Properties
| Property | Test Method | Conditions | Value | Units |
| Dielectric Strength | ASTM D149 | 1/8” @ 25°C / 77°F | 350 | volts / mil |
| Dielectric Constant | ASTM D150 | 1 kHz @ 25°C / 77°F 1 MHz @ 25°C / 77°F |
6.1 5.1 |
|
| Dissipation Factor | ASTM D150 | 1 kHz @ 25°C / 77°F 1 MHz @ 25°C / 77°F |
0.03 0.06 |
|
| Volume Resistivity | ASTM D257 | 25°C / 77°F 121°C / 250°F |
2.4 x 10^12 9.6 x 10^10 |
ohm-cm ohm-cm |
| Surface Resistivity | ASTM D257 | 25°C / 77°F 121°C / 250°F |
5.2 x 10^13 3.5 x 10^10 |
ohms / sq. ohms / sq. |
| Insulation Resistance | MIL-M-24041C | 25°C / 77°F 121°C / 250°F 10 d @ 95% RH |
900,000 4,200 35,000 |
megohms megohms megohms |
| Arc Resistance | MIL-M-24041C | 25°C / 77°F | > 120 | seconds |
| High Potential Resistance | MIL-M-24041C | 2,000 volts RMS @ 60 Hz | No breakdown | |
| Flame Resistance | MIL-M-24041C | 55 amps DC | No ignition |
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