Enhanced TDS
Identification & Functionality
- Chemical Family
- RTU Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Key Properties
- High filler load possible
- Good thermal shock resistance
- Good mechanical and electrical properties
- Improved demolding properties
- Glossy surface of the castings
- Glass transition temperature: 110 - 120°C
Applications & Uses
- Composites Processing Methods
- Cure Method
- Product End Uses
- Processing Methods
- Automatic pressure gelation process (APG)
- Conventional gravity casting process under vacuum
- Processing Information
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 diskharge behavior in high voltage applications.
- For the mixing of medium- to high viscous casting resin systems and for mixing at lower temperatures, we recommend special degassing mixers that may produce additional selfheating of 10-15°C as a result of friction. For low viscous casting resin sys-tems, conventional mixers are usually sufficient.
- In larger plants, the individual components (resin, hardener) are mixed 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. The vapor 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 predrying of the filler. Their moisture content should be <0.2%.
Specific Instructions
The effective pot-life of the mix is about 2 days at temperatures 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 installllations have to be cooled and cleaned with the resin component to prevent sedimentation and/or undesired viscosity increase. Interruptions over a week-end (approx. 48h) without cleaning are possible if the pipes are cooled at temperatures below 18°C. Viscosity increase and gel time at various temperatures.
Mold temperature
APG process: 130 - 160°C
Conventional vacuum casting: 80 - 100°C
Demolding times (depending on mold temperature and casting volume)
APG process: 10 - 45 min
Conventional vacuum casting: 4 - 8h
Cure conditions
APG process (minimal postcure): 4h at 140°C
Conventional vacuum casting: 4h at 80°C + 10h at 130°C or 4h at 80°C + 6h at 140°C- 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 geling and cure cycles in the manufacturing process could lead to a different crosslinking and glass transition temperature respectively
Properties
- Physical Form
Technical Details & Test Data
- Cured Properties
Processing Viscosities
Fig.4.1: Viscosity increase at 60 and 80°C (measurements with Rheomat 115)
(Shear velocity D = 10 s-1)Gelation-/Cure Times
Fig.4.2: Gel time as a function of temperature
(measured with Gelnorm Instrument, ISO 9396)Mechanical and Physical Properties
Key
Value
Unit
Test Method
Test Condition
Tensile strength 77 - 87 MPa ISO 527 at 23°C, Cured for 4h at 140°C
Elongation at break 0.90 - 1.10 % ISO 527 at 23°C, Cured for 4h at 140°C
E modulus from tensile test 11,000 - 12,000 MPa ISO 527 at 23°C, Cured for 4h at 140°C
Flexural strength 120 - 130 MPa ISO 178 at 23°C, Cured for 4h at 140°C
Surface strain 1.10 - 1.30 % ISO 178 at 23°C, Cured for 4h at 140°C
E modulus from flexural test 11,000 - 12,000 MPa ISO 178 at 23°C, Cured for 4h at 140°C
Double Torsion Test: Critical stress intensity factor (K1C)
2.20 - 2.40 MPa·m½ CG 216-0/89 at 23°C, Cured for 4h at 140°C
Double Torsion Test: Specific energy at break (G1C)
400 - 460 J/m² CG 216-0/89 at 23°C, Cured for 4h at 140°C
Impact strength 10 - 12 kJ/m² ISO 179 at 23°C, Cured for 4h at 140°C
Thermal conductivity similar to 1.00 - 1.05 W/m·K ISO 8894-1 at 23°C, Cured for 4h at 140°C
Coefficient of linear thermal expansion 33 - 37·10⁻⁶ K⁻¹ ISO 11359-2 Mean value for temperature range: 20 - 40°C
Glass transition temperature (DSC) 110 - 120 °C ISO 11357-2 at 23°C, Cured for 4h at 140°C
Water absorption (specimen: 50x50x4 mm)
0.10 - 0.20 % by wt. ISO 62 10 days at 23°C Water absorption (specimen: 50x50x4 mm)
0.07 - 0.12 % by wt. ISO 62 60 min at 100°C Density (Filler load: 65% by wt.) 1.86 - 1.88 g/cm³ ISO 1183 at 23°C Electrical Properties
Key
Value
Unit
Test Method
Test Condition
Breakdown strength 24 - 28 kV/mm IEC 60243-1 at 23°C, Cured for 4h at 140°C
Tracking resistance with test solution A >600 - <1 CTI IEC 60112 at 23°C, Cured for 4h at 140°C
Tracking resistance with test solution B >600M - <1 CTI IEC 60112 at 23°C, Cured for 4h at 140°C
HV arc resistance 182 - 185 s IEC 61621 at 23°C, Cured for 4h at 140°C
Loss factor (tan δ) at 25°C 2.9 % IEC 60250 Dielectric constant (εr) at 25°C 4.1 IEC 60250 Volume resistivity at 25°C 2.8 × 10¹⁵ Ω·cm IEC 60093
Fig.6.1: Loss factor (tan δ) and Dielectric
constant (εr) as a function of
temperature
(measurement frequency: 50 Hz, IEC 60250)
Fig.6.2: Volume resistivity (ρ) as a function of
temperature
(measurement voltage: 1000 V, IEC 60093)
Storage & Handling
- Storage Conditions
Store the components in a dry place according to the storage conditions stated on the label 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 after reanalysis. Partly emptied containers should be tightly closed immediately after use.
Other
- Application Information
Value Units Test Method / Conditions Mix Ratio 0.007 %(W) %(W) Accelerator : Resin Mix Ratio 3.4 %(W) %(W) Filler : Resin Mix Ratio 0.83 %(W) %(W) Hardener : Resin