Enhanced TDS
Identification & Functionality
- Chemical Family
- RTU Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Features and Benefits
- High mechanical and electrical properties at elevated temperature
- High thermal shock resistance
- High toughness combined with very high glass transition temperature
Applications & Uses
- Application Area
- Compatible Substrates & Surfaces
- Composites Processing Methods
- Cure Method
- Product End Uses
- Markets
- Applications
- System Preparation
General instructions for preparing liquid resin systems.
Long pot life is desirable in the processing of any casting resin system. Mix all of the components together very thoroughly at room temperature or slightly above and under vacuum. Intensive wetting of the filler is extremely important. Proper mixing will result in:
- Better flow properties and reduced tendency to shrinkage
- Lower internal stresses and therefore improved mechanical properties on object
- Improved partial discharge behaviour in high voltage applications.
For the mixing of medium to high viscous casting resin systems and for mixing at lower temperatures, we recommend special thin film degassing mixers that may produce additional self-heating of 10-15°C as a result of friction. For low viscous casting resin systems, conventional anchor mixers are usually sufficient.
In larger plants, two pre-mixers are used to mix the individual components with the respective quantities of fillers and additives under vacuum. Metering pumps then feed these premixes to the final mixer or a continuous mixer. The individual premixes can be stored at elevated temperature (about 60°C) for up to about 1 week, de-pending on formulation. Intermittent agitation during storage is advisable to prevent filler sedimentation.
Mixing time can vary from 0.5 to 3 hours, depending on mixing temperature, quantity, mixing equipment and the particular application. The required vacuum is 0.5 to 8 mbar. Degassing time is recommended at least 1 hour. The vapour pressure of the individual components should be taken into account.
In the case of dielectrically highly stressed parts, we recommend checking the quality consistency and pre-drying of the filler. Their moisture content should be <0.2%.
- Processing Information
The effective pot-life is about 1 day at temperature below 25°C. Conventional batch mixers should be cleaned once a week or at the end of work. For longer interruptions of work, the pipes of the mixing and metering installations have to be cooled and cleaned to prevent sedimentation and/or undesired viscosity increase. Interruptions over a weekend (approx. 48h) without cleaning are possible if the pipes are cooled at temperature below 18°C. In case to use mixtures with high reactivity, we recommend to clean daily with the flexibilizer DY 040.
Mold Temperature
Conventional vacuum casting 80 - 100°C
APG process 130 - 150°C
Demolding times (depending on mold temperature and casting volume)
Conventional vacuum casting 2 - 4 h
APG process 10 - 30 min
Cure conditions (minimal post cure)
Conventional vacuum casting 4h at 80°C+10h at 140°C+2h at 160°C
APG process 16h at 140°CIt is essential to achieve a thorough crosslinking. 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 object or to measure the glass transition temperature. Different gel and postcuring cycles in the manufacturing process could influence the crosslinking and the glass transition temperature respectively.
Mechanical and Physical Properties
Key Value Unit Test Method Condition Flexural strength 90 - 110 MPa ISO 178: 2001 Cured for 4h at 80°C + 10h at 140°C + 2h at 160°C
Surface strain 1.1 - 1.5 % Cured for 4h at 80°C + 10h at 140°C + 2h at 160°C
E modulus 7,000 - 10,000 MPa Cured for 4h at 80°C + 10h at 140°C + 2h at 160°C
Critical stress intensity factor (KIC) 1.8 - 2.0 MPa·m¹/² CG 216-0/89 Cured for 4h at 80°C + 10h at 140°C + 2h at 160°C
Specific energy at break (GIC) 300 - 400 J/m² CG 216-0/89 Cured for 4h at 80°C + 10h at 140°C + 2h at 160°C
Glass transition temperature (DSC) 160 - 170 °C ISO 11357-2: 1999 Cured for 4h at 80°C + 10h at 140°C + 2h at 160°C
Density (Filler load: 60% by wt.) 1.70 - 1.85 g/cm³ ISO 1183 Cured for 4h at 80°C + 10h at 140°C + 2h at 160°C
- Application Information
- Indoor electrical insulators for medium and high voltage, such as switchgears, apparatus components, insulators and bushings.
- Encapsulation of large metal parts.
- Recommended to applications with long term mechanical stresses up to service temperature of 105°C.
Properties
- Physical Form
- Notes
ARADUR® HY 906 is sensitive to humidity, partly emptied containers should be closed tightly immediately after use. It is necessary to store this product in the sealed original container
Storage & Handling
- Storage Conditions
The components have to be stored in tightly sealed and dry original containers according to the storage conditions on the product label. Under these conditions, the shelf life will correspond to the expiration date stated on the label. After this date, the product may be processed only following reanalysis. Partialy emptied containers should be closed tightly immediately after use. For information on waste disposal and hazardous products of decomposition in the event of fire.
Other
- Application Information
Value Units Test Method / Conditions Mix Ratio 2.7 %(W) %(W) Filler : Resin Mix Ratio 0.005 %(W) %(W) Flexibilizer : Resin Mix Ratio 0.9 %(W) %(W) Hardener : Resin - Physical Properties
Value Units Test Method / Conditions Gel Time 7.0-8.0 m m ISO 9396 at 140°C