ABLESTIK 931-1
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- Low-Viscosity Fine-Gap Encapsulation
- Low-Exotherm One-Step Casting Cure
- 27.6 kV/mm Dielectric Strength
Product Description
LOCTITE® ECCOBOND 931-1 is a one-component, heat-cured epoxy encapsulant designed for general potting applications. Its low viscosity and wetting characteristics support impregnation of tightly wound coils and flow around closely packed components. The clear-amber material provides a typical viscosity of 300 cP at 25°C and a six-hour work life at 25°C. Its low-exotherm formulation supports one-step curing of large castings under suitable process conditions, with guideline cure options including 1 hour at 100°C or short heat exposure followed by 24 hours at 25°C.
Key features
- Low-viscosity impregnation: Typical viscosity of 300 cP at 25°C supports flow into tightly wound coils and intricate assemblies.
- Low-exotherm curing: Formulated to support one-step curing of large castings under appropriately validated process conditions.
- Electrical insulation: Typical cured properties include dielectric strength of 27.6 kV/mm and volume resistivity of 2 × 1014 ohm-cm.
Applications / Suitable for
- General potting applications
- Impregnation of tightly wound coils
- Encapsulation of closely packed components
- Large castings requiring controlled low-exotherm processing
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Thermal Properties
Electrical Properties
Physical Properties
Additional Information
As-supplied / before-processing properties
Typical properties, storage conditions, work life, and guideline cure schedules for the encapsulant before final processing.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Technology | Epoxy | — | One-component encapsulant |
| Appearance | Clear amber liquid | — | As supplied |
| Viscosity | 300 | cP | At 25°C; test method not stated |
| Density | 1.1 | g/cm³ | As supplied |
| Work life | 6 | hours | At 25°C |
| Shelf life | 365 | days | At -40°C, from date of manufacture |
| Shelf life | 182 | days | At 5°C, from date of manufacture |
| Cure schedule | 1 hour, 5 minutes plus 24 hours, or 3 minutes plus 24 hours | — | 1 hour at 100°C; 5 minutes at 100°C plus 24 hours at 25°C; or 3 minutes at 130°C plus 24 hours at 25°C; guideline recommendations |
After-processing / final-state properties
Typical physical, thermal, ionic, and electrical properties of the cured encapsulant. Values are reference data and are not product specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Hardness | 88 | Shore D | Cure condition and test method not stated |
| Density — cured | 1.2 | g/cm³ | Test method and cure condition not stated |
| Glass-transition temperature | 100 | °C | Method and cure condition not stated |
| Coefficient of thermal expansion — below Tg | 67 | ppm/°C | TMA; cure condition not stated |
| Coefficient of thermal expansion — above Tg | 240 | ppm/°C | TMA; cure condition not stated |
| Weight loss at 150°C | 0.08 | % | Test method and exposure duration not stated |
| Weight loss at 250°C | 0.3 | % | Test method and exposure duration not stated |
| Weight loss at 300°C | 1.0 | % | Test method and exposure duration not stated |
| Water-extract conductivity | 51 | µmhos/cm | Extraction conditions and test method not stated |
| Extractable chloride | 100 | ppm | Test method and extraction conditions not stated |
| Extractable sodium | 5 | ppm | Test method and extraction conditions not stated |
| Extractable potassium | 5 | ppm | Test method and extraction conditions not stated |
| Thermal conductivity at 121°C | 0.2 | W/(m·K) | Test method and specimen configuration not stated |
| Dielectric strength | 27.6 (700) | kV/mm (V/mil) | Test method, thickness, and conditioning not stated |
| Dielectric constant | 4.5 | — | Frequency and test method not stated |
| Dissipation factor | 0.026 | — | Frequency and test method not stated |
| Volume resistivity | 2 × 1014 | ohm-cm | Test method and cure condition not stated |
