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AS1700 – 310ml Cartridge | CHT

1 Part Non-Corrosive Neutral Cure Adhesive Sealant and Coating (Electronic Grade)

£33.79

  • Hardness Shore A of 30
  • Alkoxy Cure type
  • Density 1.1 g/cm³
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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%<br>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<br>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<br>2240-95 30
Linear Coefficient of Thermal<br>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<br> 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.

CHT AS1700 Technical Datasheet





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