LOCTITE SI 5290
Harmonization Code : 2901.10.00.00 | Acyclic hydrocarbons; Saturated
Main features
- 100 to 350 mPa s Viscosity
- -53 to 204 deg C Operating Range
- 18 kV/mm Dielectric Strength
Product Description
LOCTITE SI 5290 is a one-component alkoxy silicone conformal coating for printed circuit boards and electronic assemblies. UV light initiates cure in exposed material, while atmospheric moisture continues cure in shadowed regions. The uncured liquid has at least 92% non-volatile content and a Brookfield viscosity of 100 to 350 mPa s at 25 deg C. Its operating temperature range is -53 to 204 deg C. Under the stated cured-material conditions, electrical properties include volume resistivity of 2x10^14 ohm cm and dielectric breakdown strength of 18 kV/mm.
Key features
- Shadowed-Area Cure: UV light initiates cure in exposed coating, while atmospheric moisture continues cure in shadowed regions.
- Coating Rheology: Brookfield viscosity is 100 to 350 mPa s at 25 deg C.
- Temperature Capability: Operates from -53 to 204 deg C.
Applications
Conformal coating of printed circuit boards and electronic assemblies.
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Additional Information
As-supplied / before-processing properties
Typical as-supplied values under the stated methods and conditions.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Specific gravity | 1.0 | - | 25 deg C; typical |
| Non-volatile content | >=92 | % | Typical |
| Viscosity | 100 to 350 | mPa s | Brookfield RVT; 25 deg C; spindle 1; 10 rpm |
After-processing / final-state properties
Physical and electrical data use different documented cure schedules; each condition is retained by row.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Water absorption | 0 | % | ISO 62; 40 mW/cm^2 at 365 nm, 60 seconds per side, plus 7 days at 22 deg C / 50% RH |
| Elongation | 15 | % | ISO 37; same physical-property cure |
| Thermal conductivity | 0.15 | W/(m K) | Same physical-property cure |
| Volume resistivity | 2x10^14 | ohm cm | IEC 60093; 70 mW/cm^2 at 365 nm, 60 seconds per side, plus 72 hours at 22 deg C |
| Dielectric breakdown strength | 18 | kV/mm | IEC 60243-1; same electrical-property cure |
