ARALDITE® CY 5622 / ARADUR® HY 1238 / ACCELERATOR DY 062 / Color Paste DW 9134 / Filler Silica flour

• Hydrophobicity transfer and recovery
• Good mechanical properties
• Excellent dielectric properties
• Very good thermal shock resistance
• High resistance to erosion under UV-radiation
• Extended life-time of insulation
• The use of silanised silica flour ensures stable dielectric properties under outdoor humid conditions

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:

1. better flow properties and reduced tendency for shrinkage
2. lower internal stresses and therefore improved mechanical properties of cast components
3. improved partial diskharge behavior in high voltage applications.

• For the mixing of medium- to high viscosity 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 viscosity 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. In case of outdoor application particularly thorough wetting is essential. 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 pbw, we recommend checking the quality consistency and predrying of the filler. Their moisture content should be < 0.2%.

Specific Instructions

The resin component CY 5622 is supplied with a gel-like consistency. It is liquefied by stirring. To adjust a suited viscosity range of the resin, the temperature of the resin at the begin of the stirring process, should be above 6 °C, and below 30°C. In case of longer exposure to temperatures below 6 °C the temperature should be controlled inside in the middle of the packaging before stirring. If the temperature inside the bulk of the product is measured to be below 6 °C the packaging should be heated smoothly from out side (best from below) with max. 30 °C. As this warming process may take up to several weeks depending on size of packaging and temperature conditions, the lead times and storage space should be adjusted in winter accordingly. The resin heats up due to the stirring, the maximum termperature should be 40 °C. A special mixing equipment is needed, as it has to be introduced via the hole of the container. To achieve sufficient and homogenous stirring effect, the stirrer should extend inside the container and a special design is needed for rectangular containers like the ecobulk. Such design has to ensure that all liquid in edges is sufficiently homogenized. A dynamic torque controlled motor will be needed as the stirring has to start smoothly. (Recommendations for suited stirrer equipment are available on request.) Transferring the gel-like structure into a normal, low viscous liquid might take several hours. During consumption of the resin, it should be stirred 5 – 15 minutes / hour.
No special preparation are needed for the hardener.

Color Paste to be added to the resin part.

For an optimized processing we recommend to prepare first individual premixtures of resin and hardener with the filler. It is recommend to apply a temperature of 50-60°C for the preparation of the mixtures. As CY 5622 contains rheological additives, in most of the cases there is no need to add additional anti-settling additives (for the resin part).

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 should be cooled and cleaned with the resin component to prevent sedimentation and/or undesired viscosity increase. Interruptions that extend over a week-end (approx. 48h) without cleaning are possible if the pipes are cooled at temperatures below 18°C.

Mold temperature
Accelerator content
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 - 4 h

Cure conditions (minimum post curing)
APG process: 10h at 140°C
Conventional vacuum casting: 16h at 140°C

• For any outdoor application, we recommend the use of silanised silica flour; for example Silbond W12-EST (Quarzwerke GmbH, Frechen, D). Again it is essential to achieve a thorough crosslinking. To determine whether crosslinking has been carried to completion and the final properties are optimal, it is recommended to carry out relevant measurements on the actual object or to measure the glass transition temperature.

The resin component CY 5622 is supplied with a gel-like consistency. It is liquefied by stirring. To adjust a suited viscosity range of the resin, the temperature of the resin at the begin of the stirring process, should be above 6°C, and below 30°C. In case of longer exposure to temperatures below 6°C the temperature should be controlled inside in the middle of the packaging before stirring. If the temperature inside the bulk of the product is measured to be below 6°C the packaging should be heated smoothly from out side (best from below) with max. 30°C. As this warming process may take up to several weeks depending on size of packaging and temperature conditions, the lead times and storage space should be adjusted in winter accordingly. The resin heats up due to the stirring, the maximum termperature should be 40°C. A special mixing equipment is needed, as it has to be introduced via the hole of the container. To achieve sufficient and homogenous stirring effect, the stirrer should extend inside the container and a special design is needed for rectangular containers like the ecobulk. Such design has to ensure that all liquid in edges is sufficiently homogenised. A dynamic torque controlled motor will be needed as the stirring has to start smoothly. (Recommendations for suited stirrer equipment are available on request.) Transferring the gel-like structure into a normal, low viscous liquid might take several hours. During consumption of the resin, it should be stirred 5 – 15 minutes / hour.

No special preparation is needed for the hardener.
Color Paste to be added to the resin part.

For an optimized processing we recommend to prepare first individual premixtures of resin and hardener with the filler. It is recommend to apply a temperature of 50-60°C for the preparation of the mixtures. As CY 5622 contains rheological additives, in most of the cases there is no need to add additional anti-settling additives (for the resin part).

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 should be cooled and cleaned with the resin component to prevent sedimentation and/or undesired viscosity increase. Interruptions that extend over a week-end (approx. 48h) without cleaning are possible if the pipes are cooled at temperatures below 18°C.

Mold temperature
Accelerator content
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 - 4 h
Cure conditions (minimum post curing)
APG process : 10h at 140°C
Conventional vacuum casting : 16h at 140°C

For any outdoor application, we recommend the use of silanised silica flour; for example Silbond W12-EST (Quarzwerke GmbH, Frechen, D). Again it is essential to achieve a thorough crosslinking. To determine whether crosslinking has been carried to completion and the final properties are optimal, it is recommended to carry out relevant measurements on the actual object or to measure the glass transition temperature.

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.

Aradur HY 1238 is sensitive to humidity. It is therefore necessary to store this product in sealed original containers