Enhanced TDS
Identification & Functionality
- Chemical Family
- RTU Product Type
- Technologies
- Product Families
Features & Benefits
- Product Features
- Key Properties
- Medium initial viscosity
- Low shrinkage on curing
- Good thermal stability at temperatures up to 65oC
- Good mechanical properties
- High proportion of filler can be added
- Resilient castings
Applications & Uses
- Product End Uses
- Application Information
Transformers, filters, capacitors etc.
- Processing Methods
- Casting / impregnating
- Manually or with automatic mixing and dosing equipment
Technical Details & Test Data
- Processing Information
Because of the tendency of sedimentation of the fillers, pre-filled components in principle require stirring before removal from the original containers. To avoid errors in dosage, this step is especially important when removing only part of the contents. Prefilled ARALDITE components can be heated to 40°C - 60°C in the original container to facilitate stirring and removal. In the storage vessels of the production equipment, the pre-filled products should be stirred up from time to time to avoid sedimentation and possible irregular metering. For better control of the thermal reaction and consistency during processing and curing, it is recommended the ARADUR hardener components be conditioned to 18 - 22°C
Mixing: In preparing the casting mixture, the ARADUR hardener component is thoroughly stirred into the ARALDITE resin component. Brief degassing of the casting mixture under a vacuum of 5 10 mbar improves homogeneity and enhances the dielectric properties of the casting. Mixing of the components can be done at room temperature. Heating of the resin can lower its viscosity but will shorten the pot life.
Curing: To determine whether crosslinking has been carried to completion and the final properties are optimal, it is necessary to carry out relevant measurements on the actual cast object or to measure the glass transition temperature. Different gel and cure cycles in the customer s manufacturing process could lead to a different degree of crosslinking and thus a different glass transition temperature.
- Cured Properties
Key Value Unit Test Method Test Condition Tensile strength 34 - 45 MPa ISO R 527 : 1993 Determined on standard test specimens at 23°C
Compressive strength 50 - 60 MPa ISO 604 : 1985 Cured for 7 days at 25°C
Glass transition temperature 45 - 55 °C ISO 11357-2 : 1999 Cured for 7 days at 25°C
Coefficient of linear thermal expansion 70 - 80 ppm/K ISO 11359-2 : 1999 Mean value below Tg
Water absorption 0.4 - 0.6 % by wt. ISO 62 : 1999 10 days at 23°C, specimen: 50x50x4 mm
Density 1.15 - 1.20 g/cm³ ISO 1183 Determined on standard test specimens at 23°C
Thermal conductivity 0.15 - 0.25 W/m·K ISO 8894 : 1990 Cured for 7 days at 25°C
Storage & Handling
- Storage Conditions
The components have to be stored under dry conditions at 10 - 40°C, in tightly sealed original containers. Under these conditions, the shelf life will correspond to the expiry date stated on the label. After this date, the product may be processed only following reanalysis. Partly emptied containers should be closed tightly immediately after use. For information on waste disposal and hazardous products of decomposition in the event of fire, refer to the Material Safety Data Sheets (MSDS) for these particular products.
Other
- Processing & Application Methods
- Application Information
Value Units Test Method / Conditions Mix Ratio 0.45 %(W) Hardener : Resin