CHT AS1504 High Temperature Thixotropic Adhesive Sealant 310ml Cartridge

This is a 1-part, RTV (Room Temperature Vulcanising) silicone adhesive sealant. It is one in a range of Acetoxy cure products which are solvent free. During cure, it liberates a very small amount of acetic acid, giving rise to the familiar vinegar odour, which quickly dissipates after cure.

It exhibits good primerless adhesion to many substrates and cures rapidly at room temperature when in contact with atmospheric moisture. This product is not to be recommended for use with copper and its associated alloys or in electronic assemblies.

Features:

• Flexible from -50 to +300°C
• Good electrical insulation properties
• Excellent adhesion to many substrates
• Previously known as ACC AS1504

Use and Cure Information:

AS1504 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 °C 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.

Technical Properties:

Uncured Product:

• Appearance Red Paste
• Cure Type Acetoxy
• Extrusion Rate g/min 255 g/min
• FDA CFR (21] 177.2600 No
• Max Cure Hrs @ 25 °C 7 hrs
• Rheology Paste
• Self Bonding Yes
• Tack Free Time mins 4 mins

Cured product:

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

• CTE Linear ppm/°C 294 ppm/°C
• CTE Volumetric ppm/°C 882 ppm/°C
• Colour Red
• Duro Shore A ASTM D 2240-95 35
• Elongation % ISO 37 410 %
• Linear Shrinkage % 0.8 %
• Max Working Temp +°C AFS_1540B 300 °C
• Min Working Temp - °C -50 °C
• Modulus @ 100% Strain MPa 0.98 MPa
• Modulus Youngs MPa 0.71 MPa
• SG BS ISO 2781 1.09
• Tear kN/m BS ISO 34-1 6.3 kN/m
• Tensile MPa ISO 37 2.5 MPa
• Thermal Conductivity W/mK 0.2 W/mK
• UL 94V-0 No