STYCAST 1266
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- Low-Viscosity Fine-Gap Impregnation
- Optically Clear Encapsulation
- Flexible Ambient or Heat Cure
Product Description
LOCTITE STYCAST 1266 Epoxy Encapsulant is a clear, two-component low-viscosity epoxy system for impregnation and encapsulation where optical clarity and flow into small tolerances are important. Parts A and B mix 100:28 by weight or 100:33 by volume to produce a typical mixed viscosity of 650 cP and a 30-minute working time at 25 deg C. The material can cure at ambient temperature or in one to two hours at 65 deg C, with an optional post-cure. After cure, it provides documented mechanical strength, moisture resistance, and electrical insulation.
Key features
- Fine-gap impregnation: A typical mixed viscosity of 650 cP supports flow into narrow spaces.
- Optically clear encapsulation: The clear system supports applications requiring visible components.
- Flexible cure options: Ambient and heat-cure schedules support different production needs.
Applications
Applications include impregnation and encapsulation of electrical or electronic components, including assemblies with small tolerances and a need for optical clarity.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Electrical Properties
Other Properties
Additional Information
As-supplied / before-processing properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Product form | Two-component clear epoxy system | Part A is clear amber; Part B is clear yellow | |
| Mix ratio | 100:28 | parts by weight | Part A:Part B |
| Mix ratio | 100:33 | parts by volume | Part A:Part B |
| Part A viscosity | 8,500 | cP | ASTM D2393 |
| Part B viscosity | 35 | cP | Typical |
| Mixed viscosity | 650 | cP | 25 deg C; typical |
| Mixed specific gravity | 1.12 | Typical | |
| Working time | 30 | minutes | 100 g mass at 25 deg C |
After-processing / final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Hardness | 75 | Shore D | ASTM D2240 |
| Dielectric strength | 15.7 | kV/mm | ASTM D149 |
| Dielectric constant | 3.0 | 60 Hz; ASTM D150 | |
| Dissipation factor | 0.02 | 60 Hz; ASTM D150 | |
| Volume resistivity | 1 x 10^15 | ohm cm | 25 deg C; ASTM D257 |
| Flexural strength | 138 | N/mm^2 | Typical cured value |
| Compressive strength | 69 | N/mm^2 | Typical cured value |
| Tensile strength | 41 | N/mm^2 | Typical cured value |
