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Tflex™ 54500 – 4.5mm | Laird
22/02/2024
AS1811 – 310ml Cartridge | CHT
26/02/2024
AS1700 – 310ml Cartridge | CHT
1 Part Non-Corrosive Neutral Cure Adhesive Sealant and Coating (Electronic Grade)
£33.79
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- Hardness Shore A of 30
- Alkoxy Cure type
- Density 1.1 g/cm³
Available with lead time | Contact Us
Description
CHT AS1700 is a non-corrosive, neutral cure, 1-part, RTV (Room Temperature Vulcanising) silicone adhesive sealant. It is one in a range of Alkoxy cure products which are solvent free. It exhibits excellent primer less adhesion to many substrates and cures at room temperature when in contact with atmospheric moisture to form a tough rubber. CHT AS1700 will not corrode copper or its alloys and is suitable for use with electronic components.
Benefits
- Hardness Shore A of 30
- Alkoxy Cure type
- Density 1.1 g/cm³
Features
- Non corrosive
- Excellent adhesion to most substrates
- Excellent dielectric and isolating properties
- Low Odour
Recommended Uses
- Fibre Optic Cables
Uncured Product
| Property | Test Method | Value |
|---|---|---|
| Appearance | - | Thixotropic Paste |
| Cure Profile | - | 23+/-2°C and 50+/-5% humidity |
| Cure Through to 3 mm Depth | - | 36 hr |
| Cure Type | - | Alkoxy |
| Extrusion Rate g/min | - | 290 g/min |
| Rheology | - | paste |
| Self Bonding | - | yes |
| Slump | - | 1 mm/5mins |
| Tack Free Tme / Skin Formation at 23°C/73°F | - | 10 min |
Cured Product
7 days at 23+/-2°C and 50+/-5% humidity
| Property | Test Method | Value |
|---|---|---|
| 100% Modulus (N/mm²) | - | 0.61 MPa / 88 psi |
| Color | - | Translucent |
| Density | BS ISO 2781 | 1.1 g/cm³ |
| Elongation at Break | ISO 37 | 545% |
| Hardness Shore A | ASTM D 2240-95 | 30 |
| Linear Coefficient of Thermal Expansion (ppm/°C) | - | 270 ppm/°C |
| Linear Shrinkage (%) | - | 1% |
| Max Working Temp | - | 200 °C / 392 °F |
| Min Working Temp | - | -50 °C / -58 °F |
| Tear Resistance (N/mm) | BS ISO 34-1 | 12.3 N/mm / 71 ppi |
| Tensile Strength | ISO 37 | 2.43 N/mm2 / 352 psi |
| Thermal Conductivity | - | 0.2 W/mk |
| Volume Coefficient of Thermal Expansion (ppm/°C) | - | 810 ppm/°C |
| Youngs Modulus (N/mm²) | - | 0.54 N/mm2 / 78 psi |
Electrical Properties
| Property | Test Method | Value |
|---|---|---|
| Dielectric Constant | ASTM D-150 | 3 |
| Dielectric Strength (V/mil) | - | 457 V/mil |
| Dielectric Strength kV/mm | ASTM D-149 | 18 kV/mm / 457 V/mil |
| Dissipation Factor | ASTM D-150 | 0.0025 |
| Volume Resistivity (Ohms cm) | ASTM D-257 | 2.20E+15 ohms cm |
Adhesion Testing
| Property | Test Method | Value |
|---|---|---|
| Lap Shear Aluminium kg/cm² | ASTM D1002 | 4.00 kg/cm² |
| Lap Shear Copper kg/cm² | ASTM D1002 | 3.98 kg/cm² |
| Lap Shear Polycarbonate Steel kg/cm² | ASTM D1002 | 5.22 kg/cm² |
| Lap Shear Stainless Steel 304 kg/cm² | ASTM D1002 | 3.04 kg/cm² |
Storage
| Property | Test Method | Value |
|---|---|---|
| Max Storage Temperature | - | 40 °C / 104 °F |
| Shelf Life | - | 12 months |
Use and Cure Information
This product is a ready for use 1 Part system. If supplied in cartridges it can be applied using either manual or pneumatic dispensing guns. It can also be applied from bulk containers using conventional drum dispensing equipment.
All surfaces to which the sealant is to be applied should be clean, dry and free from grease, dirt, and loose material. Priming of surfaces is not normally required. If using as an adhesive, it
should be applied to one clean surface and the other clean surface brought into contact with it within the tack free time stated opposite. For optimum bond strength, the thickness of the sealant joint should be a minimum of 1 mm.
The sealant will cure upon exposure to atmospheric moisture, ideally between 20 to 30 ºC and 40% to 70% Relative Humidity. Time taken for cure will depend on the thickness of the joint,
humidity and temperature. Joints should be left undisturbed for at least 24 hours, but preferably longer to effect sufficient depth of cure. Full cure requires 7 days.
“For pneumatic dispensing of 310 ml cartridges, the recommended pressure is 2.25 to 3.45 bar (40 to 50 psi). Dispensing pressure above the recommended limits may lead to gas bypassing the piston, causing spluttering at the nozzle and poor bead quality”
It is important to check the compatibility in preliminary tests if unknown substrates are used.
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- Good resistance to ultra-violet light, corona, arcing and ozone.
- Virtually non existent oxidation.
- Low degree of moisture absorption.
