Silicone RTV-538 (Addition type) for electric print circle,power supply,di-bond use
RTV-538 (addition type silicone) has excellent chemical & physical properties, which generally applied on print circle board and power supply for protect from electric short and thermal conductivity。
Specification : viscocity 60,000 cps
Specific Gravity 1.06±0.03
Durometer hardness (ASTM D2240) 40 (Hardness Shore A)
Tensile strength(ASTM D412) 22.0 kg/cm2
Tear strength >20N/mm
Elongation(ASTM D412) 450%
Shringkage 0.1%
Thermal conductivity 0.21 w/m-K
Volume resistivity > 3.0 x 1014 ohm-cm
Dielectric constant(60Hz) > 25 Kv/mm
Heat on lost < 0.2%
Operation process : weight Take RTV-538 and C-538 B by 10:1 (weight ratio).
Defoaming place the mixture in vacuum vessel，kept vacuum lower than 100 mg Hg.
Filler Be careful pouring silicone to the container, avoid Occur bubble
Harden Curing 80℃X 30min.
