Grey Liquid Silicone Encapsulants Potting Compound Silicone For
Solar power Encapsulants
Description
Silicone compound is supplied as a two-component addition cure
system. It consists of Part A and Part B. The component A is white
and component B is black for easy identification and inspection of
complete mixing.(colors can be adjusted as per customer
requirement.) When the components are thoroughly mixed in a 1:1
ratio by weight or volume, the liquid mixture cures to a flexible
elastomer, which is suited for electrical/electronic potting and
encapsulating applications.
Applications
Silicone is a general purpose compound suited for adhesive and
coating. This cost-effective silicone can be used in a variety of
electronic potting applications including the adhesive and coating
for solar power, HID, LCD displayers, circuit board and electronic
components, etc.
Features
Silicone compound has a excellent electrical property features in
resistant to temperature, corrosion, radiation, insulation,
waterproof, damp proofing, shock resistance, thermal conducting,
inflaming retarding and weather ability, etc. It can be long-term
used under -50℃～200℃.
Typical properties
| Item No.: | RTV160A/B |
| Appearance(A/B) | White/Grey liquid |
| Viscosity(A/B,Mpa.s) | 3700±2000 |
| Mix ratio (A/B) | 1:1 |
| Pot life after curing(25℃,min) | 30-40 |
| Curing time (hrs) | 2-4 |
| Thermal conductivity(W/m·K)(A/B) | ≥0.60 |
| Durometer Hardness(JIS A0) | 56 |
| Volume resistivity(Ω·cm) | 7X10 14 |
| Dielectric breakdown voltage(KV/mm) | ≥20 |
| Flammability classification | UL-94 V-0 |
| Shrinkage % | 0.01 |
Thermal expansion properties
The coefficient of thermal expansion ranging of silicone compound
is 5.9-7.9 x 10-4/°C. The coefficient of linear thermal expansion
is about 1/3 of the coefficient of volume thermal expansion; it can
be used for the overall linear thermal expansion calculation of
rubber parts under a certain limits of temperature.
Curing time
The following cure schedules may be used as a guideline; however,
larger masses may require longer periods of time to reach
temperature.
24 hours at 23-25℃
4-6 hours at 50℃
1-2 hours at 100℃
Faster if needed
25-30 mins at 60℃
18 mins at 70℃
5 mins at 80℃
Using Instructions
Silicone compound part A and Part B should be thoroughly mixed at a
1:1 ratio (weight or volume) before using. Pour into the electronic
components after vacuum de-airing. Silicone compound may be cured
at room temperature or accelerated with heat.
Precautions
- The curing time varies due to different temperature, the higher
temperature, it cures faster. Users can adjust the ratio of
catalyst according to the temperature in order to get an ideal
curing speed.
- Certain materials can inhibit the cure of Silicone rubber. The most
notable include: sulfur, polysulfide, sulfur-containing material,
Organ tin and organ metallic compound, etc.
- Prevent from contact with tin, phosphorus, water, ammonium,
chlorine, carboxylic acid, hydroxyl compound, etc. to avoid
un-curing circumstance.
Packing and Storage
- Silicone rubber is shipped as kits that Part A and B liquid
components in separate containers. It is available in packing in
5kg or 20kg,200kg per pail.
- Silicone rubber must be tightly sealed in cool and dry place,
prevented from sun and rain. Transport by non-dangerous goods.
