BESIL 8130 is a two-part Condensed cure RTV. Comparing to addition cure system, BESIL 8130 has following features:
• Stable operating process and potting time
• Could reduce or improve the curing time by modified the mix ratio
• Will not suffer catalyst poisoning
• Two-part, 10:1 mixing ratio
• Medium viscosity Room temperature cure
• Condensation cure system: Methanol by-products
• Flame retardant: meets Underwriters Laboratories UL 94-V0
• Stable and flexible from -50°C(58°F) to +250°C (432°F)
• Flexible rubber - protects against mechanical shock and thermal cycling stress at components
• Excellent dielectric properties
APPLICATIONS
•Designed to protect against moisture, environmental attack, mechanical and thermal shock as well as vibration especially where good adhesion is required.
•Typical applications include: encapsulation of amplifiers, automotive electronic units, ballast, bleed resistors, connectors, flyback transformers, high voltage resistor packs, lifting magnets, power controllers, power supplies, radio frequency induction transformers and sensing devices.
TYPICAL PROPERTIES
Property | GB/T | ASTM | Unit | Value A/B |
Colour (Part A/Part B)
|
|
|
| White or Black /Clear |
Viscosity at 23°C (Part A/Part B)¹
| 10247-2008 | D1084 | mPa.s | 3500/100 |
Specific gravity at 23°C (Part A/Part B) | 13354-92 | D792 | g/cm3 | 1.28/0.99 |
Catalysed, Mixed 10:1 by weight
| ||||
Potting life at 23°C | 10247-2008 | D1084 | mins | 60±10 |
Gel time at 23°C | 10247-2008 | D1084 | Hour | 1.5 |
Cure time at 23°C |
|
| Hour | 12 |
Physical properties, cured 7days at RT | ||||
Colour |
|
|
| Black or White
|
Specific gravity at 23°C | 13354-92 | D792 | g/cm3 | 1.25 |
Durometer hardness | 531.1-2008 | D2240 | Shore A | 32±5 |
Tensile strength | 6328-86 | D412 | MPa | 1.2 |
Elongation at break | 6328-86 | D412 | % | 80 |
Shear strength | 6328-86 | D624 | kN/m | 0.8
|
Thermal conductivity | 10297-1998 | D2214 | W/(m.K) | 0.4 |
Volume coefficient of thermal expansion | 20673-2006 |
| ppm | 200 |
Electrical properties, cured 7days at RT | ||||
Dielectric strength, 2mm thickness | 1693-2007 | D149 | kV/mm | 20 |
Permittivity at 100Hz/100kHz | 1693-2007 | D150 |
| 3.00 |
Dissipation factor at 100Hz/100kHz | 1693-2007 | D150 |
| 0.009 |
Volume resistivity | 1692-92 | D257 | Ohm.cm | 1.1x10¹5 |
Specification writers: These values are not intended for use in preparing specifications.
HOW TO USE
Substrate preparation
All surfaces should be cleaned and degreased with a suitable solvent prior to potting. Care should be taken to ensure that all solvent is removed. For best adhesion, coat surfaces with PM 1200, following the instructions and precautions given for use of these products.
Mixing
•BESIL 8130 is supplied in lot matched kits consisting of Part A and Part B in separate containers. During long periods of storage, some of the filler may settle at the bottom of the containers and should be individually homogenised prior to use.
•The two components should be thoroughly mixed using a weight ratio of 10:1 until the mixture has a uniform colour. Vacuum de-airing is recommended. A residual pressure of 10-20 mm mercury applied for 5-10 minutes will sufficiently de-air the material.
Curing
BESIL 8130 should be cured using one of the following recommended schedules:
3 hours at 23°C cured the surface.
12 hours at 23°C cured 3cm thickness.
Deeper components and assemblies may require longer times in order to reach the bottom cured.
PACKAGING AND STORAGE
• When stored at or below 35°C in the original unopened containers, this product has a usable life of 12 months from the date of production.
• Have to test if expired.
• BESIL 8130 is available in standard industrial container sizes. Other size should be approved.
• Part A: 10kg/pail, 200kg/drum; Part B: 1kg/bottle. 
