Description
AS1803 is a non-corrosive, neutral cure, 1-part, RTV (Room Temperature Vulcanising) silicone adhesive sealant. It is one in a range of Acetone cure products which are solvent-free. It exhibits excellent primerless adhesion to many substrates and cures rapidly at room temperature when in contact with atmospheric moisture to form a tough rubber. This product will not corrode copper or its alloys and is suitable for use with electronic components.
Key Features:
- UL recognised in file No. E334038
- Good thermal conductivity
- Non Corrosive
- Fast Skinning
Applications: Automotive, thermal transfer, and bonding/potting in PCBs
| Uncured Product | ||
| Property | Test Method | Value |
| Cure Profile | 23+/-2°C and 65% humidity | |
| Cure Through to 3 mm Depth | 8 hr | |
| Cure Type | Acetone | |
| Rheology | Paste | |
| Self Bonding | Yes | |
| Tooling Time 23°C/73°F | 4 min | |
| Cured Product | ||
| Property | Test Method | Value |
| 100% Modulus (N/mm2) | 0.5 MPa / 73 psi | |
| Color | White | |
| Density | BS ISO 2781 | 2.24 g/cm3 |
| Elongation at Break | ISO 37 | 94% |
| Hardness Shore A | ASTM D 2240-95 | 65 |
|
Linear Coefficient of Thermal Expansion (ppm/°C)
|
198 ppm/°C | |
| Linear Shrinkage | 1.00% | |
| Max Working Temp | 220 °C / 428 °F | |
| Min Working Temp | -50 °C / -58°F | |
| Tensile Strength | ISO 37 | 2.8 N/mm2 / 406 psi |
| Thermal Conductivity | 1.55 W/mK | |
| UL File No. | E334038 | |
|
Volume Coefficient of Thermal Expansion (ppm/°C)
|
475 ppm/°C | |
| Youngs Modulus (N/mm2) | 0.4 N/mm2 / 58 psi | |
| Electrical Properties | ||
| Property | Test Method | Value |
| Dielectric Constant | ASTM D-150 | 4.9 |
| Dielectric Strength (V/mil) | 508 V/mil | |
| Dielectric Strength (kV/mm) | ASTM D-149 | 39 kV/mm |
| Dissipation Factor | ASTM D-150 | 0.009 |
| Volume Resistivity (Ohms cm) | ASTM D-257 | 1.00E+14 ohms cm |
| Adhesion Testing | ||
| Property | Test Method | Value |
| Lap Shear Aluminium | ASTM D1002 | 6 kg/cm² |
| Lap Shear Copper | ASTM D1002 | 3 kg/cm² |
| Lap Shear Stainless Steel | ASTM D1002 | 2.6 kg/cm² |
| Storage | ||
| Property | Test Method | Value |
| Max Storage Temperature | 40 °C / 104 °F | |
| Shelf Life |
9 months in cartridges, 12 months in pails/drums
|
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