Enhanced TDS
Identification & Functionality
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- RTU Product Type
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Features & Benefits
- Ready-to-Use Product Features
Applications & Uses
- Composites Processing Methods
- Product End Uses
- Markets
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- 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 self-heating of 10-15 K as a result of friction. For low viscous casting resin systems, 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, depending 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 - 150°C
Conventional vacuum casting: 80 - 100°C
Demolding times (depending on mold temperature and casting volume)
APG process: 10 - 30 min
Conventional vacuum casting: 2 - 4h
Cure conditions
APG process (minimal postcure): 10h at 140°C
Conventional vacuum casting: 16 h 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.
- Processing Methods
- Automatic pressure gelation process (APG)
- Conventional gravity casting process under vacuum
Regulatory & Compliance
- Certifications & Compliance
Technical Details & Test Data
- Cured Properties
Figure 1: Viscosity increase at 40, 60 and 80 °C
(measurements with Rheomat 120, MSDIN 125, Shear rate D = 10 s-1)
Figure 2: Initial viscosity as a function of temperature
(measurements with Rheomat 115, D = 10 s-1)
Figure 3: Geltime as a function of temperature
(measured with Gelnorm Instrument, ISO 9396)Mechanical and Physical Properties
Property
Test Method
Unit
Value
Test Condition
Tensile strength ISO 527 MPa 80 - 90 Cured for 4h at 80°C + 6h at 150°C
Elongation at break ISO 527 % 0.8 - 1.2 Cured for 4h at 80°C + 6h at 150°C
E modulus from tensile test ISO 527 MPa 10,000 - 12,000 Cured for 4h at 80°C + 6h at 150°C
Flexural strength at 23°C ISO 178 MPa 110 - 130 Cured for 4h at 80°C + 6h at 150°C
Surface strain at 23°C ISO 178 % 1.0 - 1.5 Cured for 4h at 80°C + 6h at 150°C
E modulus from flexural test ISO 178 MPa 10,000 - 12,000 Cured for 4h at 80°C + 6h at 150°C
Critical stress intensity factor (Kic) CG 216-0/89 MPa·m½ 1.90 - 2.10 Cured for 4h at 80°C + 6h at 150°C
Specific energy at break (Gic) CG 216-0/89 J/m² 300 - 350 Cured for 4h at 80°C + 6h at 150°C
Glass transition temperature (DSC) ISO 11357-2 °C 130 - 140 Cured for 4h at 80°C + 6h at 150°C
Coefficient of linear thermal expansion ISO 11359-2 ppm/K 28 - 32 Cured for 4h at 80°C + 6h at 150°C
Thermal conductivity similar to ISO 8894-2 W/m·K 0.95 - 1.00 Cured for 4h at 80°C + 6h at 150°C
Water absorption (10 days at 23°C) ISO 62 % by wt. 0.15 - 0.20 Cured for 4h at 80°C + 6h at 150°C
Water absorption (60 min at 100°C) ISO 62 % by wt. 0.05 - 0.10 Cured for 4h at 80°C + 6h at 150°C
Flammability UL 94 class HB Cured for 4h at 80°C + 6h at 150°C
Decomposition temperature (heating rate: 10K/min)
DTA °C > 350 Cured for 4h at 80°C + 6h at 150°C
Density (Filler load: 66% by wt.) ISO 1183 g/cm³ 1.88 - 1.94 Cured for 4h at 80°C + 6h at 150°C
Electrical PropertiesProperty Test Method Unit Value Test Condition Breakdown strength IEC 60243-1 kV/mm 21 - 25 Cured for 4h at 80°C + 6h at 150°C
HV arc resistance IEC 61621 s 185 - 190 Cured for 4h at 80°C + 6h at 150°C
Tracking resistance (solution A) IEC 60112 CTI >600 - <1 Cured for 4h at 80°C + 6h at 150°C
Tracking resistance (solution B) IEC 60112 CTI >600M - <1 Cured for 4h at 80°C + 6h at 150°C
Electrolytic corrosion DIN 53489 grade A-1 Cured for 4h at 80°C + 6h at 150°C
Figure 4: Loss factor (tan δ) and rel. permitivity (εr) at 50 Hz (IEC 60250)
Figure 5: : Volume resistivity at 50 Hz (IEC 60093)
Safety & Health
- First Aid
Contamination of the eyes by resin, hardener or casting mix should be treatedimmediately by flushing with clean, running water for 10 to 15 minutes. A doctor should then be consulted.
Material smeared or splashed on the skinshould be dabbed off, and the contaminated area then washed and treated with a cleansing cream. A doctor should be consulted in the event of severe irritation or burns. Contaminated clothing should be changed immediately.
Anyone taken ill after inhalingvapors should be moved out of doors immediately. In all cases of doubt call for medical assistance.- Handling Precautions
Safety precautions at workplace Protective clothing Yes Gloves Essential Arm protectors Recommended when skin contact likely Goggles/safety glasses Yes Respirator/dust mask Recommended Skin protection Before starting work Apply barrier cream to exposed skin After washing Apply barrier or nourishing cream Cleansing of contaminated skin Dab off with absorbent paper, wash with warm water and alkali-free soap, then dry with disposable towels. Do not use solvents Clean shop requirements Cover workbenches, etc. with light colored paper. Use disposable breakers, etc. Disposal of spillage Soak up with sawdust or cotton waste and deposit in plastic-lined bin Ventilation Of workshop Renew air 3 to 5 times an hour Of workplace Exhaust fans. Operatives should avoid inhaling vapors. - Industrial Hygiene
- Mandatory and recommended industrial hygiene procedures should be followed whenever the products are being handled and processed.
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. Partly emptied containers should be closed tightly immediately after use.