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AS1811 – 310ml Cartridge | CHT

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

£109.20

  • Hardness Shore A of 61
  • Acetone Cure type
  • Density 2.75 g/cm³
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SKU: 94238 Categories: , Brand:

Description

CHT AS1811 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 primer less adhesion to many substrates and cures rapidly at room temperature when in contact with atmospheric moisture to form a tough rubber. CHT AS1811 will not corrode copper or its alloys and is suitable for use with electronic
components.

Benefits

  • Hardness Shore A of 61
  • Acetone Cure type
  • Density 2.75 g/cm³

Features

  • UL94 V0 recognised in file No. E334038
  • Thermally conductive
  • Non corrosive
  • Low volatile content

Recommended Uses

  • TIM for electronic and thermal management applications

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 – 18 hr
Cure Type – Acetone
Extrusion Rate g/min – 57 g/min
Rheology – paste
Self Bonding – yes
Tack Free Tme / Skin<br>Formation at 23°C/73°F – 3 min

Cured Product

7 days at 23+/-2°C and 50+/-5% humidity

 

Property Test Method Value
Color – Translucent
Density BS ISO 2781 2.75 g/cm³
Hardness Shore A ASTM D<br>2240-95 61
Max Working Temp – 200 °C / 392 °F
Min Working Temp – -50 °C / -58 °F
Thermal Conductivity Heat<br>Flow Meter ISO 8301 / ASTM C518 2.12 W/mk
Thermal Conductivity Less<br>Disc ASTM D7340 3.02W/mk
UL 94V-0 – Yes
UL File No. – E334038

Electrical Properties

Property Test Method Value
Volume Resistivity (Ohms cm) ASTM D-257 6.17E+14 ohms cm

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”

CHT AS1811 Technical Datasheet





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