ARALDITE® CW 5908 / ARADUR® HW 5909

• Easy handling combined with long pot-life at moderate temperature
• Short gel and demolding time at temperature above 140°C (284ºF)
• High tracking and arc resistance
• Good toughness combined with elevated glass transition temperature
• Very high erosion resistivity under Ultra Violet Radiation
• High stability of the dielectric properties also in humid atmosphere
• Insulating material with excellent outdoor behavior

• Easy handling combined with long pot-life at moderate temperature
• Short gel and demolding time at temperature above 140°C (284ºF)
• High tracking and arc resistance
• Good toughness combined with elevated glass transition temperature
• Very high erosion resistivity under Ultra Violet Radiation
• High stability of the dielectric properties also in humid atmosphere
• Insulating material with excellent outdoor behavior

• 155ºC (311ºF) Continuous rating by IEC 216 Standards
• Outdoor electrical insulating components
• Bushings
• Line post and pin insulators in the medium voltage range.
• All components for humid indoor medium and high voltage environments
• Excellent indoor and outdoor switchgear components

• Outdoor electrical insulating components
• Bushings
• Line post and pin insulators in the medium voltage range
• All components designed for humid indoor medium and high voltage environments

The two components should be mixed in the desired quantity under vacuum and at slight elevated temperature (up to 60°C/140ºF). For mixing of medium- to high- viscous casting resin systems and for mixing at lower temperatures, we recommend special thin film de-gassing mixers that may produce additional self-heating of 10ºC -15 °C (50ºF – 29ºF) as a result of friction. Depending on the quantity, mixer device, mixing temperature and application, the mixing time is, under a vacuum of 1 to 8 mbar, 0.25 to 1 h.

The premixed components are packaged according to their mixing ratio. To minimize any filler sedimentation, it's recommendable to empty the container completely. Before partial use, the contents must be carefully homogenized at elevated temperature. We recommend also the same preheating temperature to prevent air entrapment. In automatic feeding and mixing installations, both components are degassed and homogenized under a vacuum of about 2 - 5 mbar in separate holding tanks. From time to time the prefilled products are agitated to avoid any sedimentation and irregular metering. After dosing and mixing with a static mixer, the system is fed directly to the vacuum casting chamber or, in case of the automatic pressure gelation process, directly to the hot casting mold. Several individual casting stations can be fed via separate feeding tubes.

The effective pot-life of the mixed system is about 1 to 2 days at temperatures below 25°C (77ºF). 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 must be cooled and cleaned with the resin component to prevent sedimentation and/or undesired viscosity increase. Interruptions over a weekend without cleaning are possible if the pipes are cooled at temperatures below 18°C (64ºF). For information regarding viscosity increase and gel time at various temperatures, refer to Figures.1 and 3.

Loss factor (tan δ) and dielectric constant (εr) as a function of temperature (measurement frequency: 50 Hz / IEC 250/ DIN 53483)

The two components should be mixed in the desired quantity under vacuum and at slight elevated temperature (up to 60°C/140ºF). For mixing of medium- to high- viscous casting resin systems and for mixing at lower temperatures, we recommend special thin film de-gassing mixers that may produce additional self-heating of 10ºC -15 °C (50ºF – 29ºF) as a result of friction. Depending on the quantity, mixer device, mixing temperature and application, the mixing time is, under a vacuum of 1 to 8 mbar, 0.25 to 1 h. The premixed components are packaged according to their mixing ratio. To minimize any filler sedimentation, it's recommendable to empty the container completely. Before partial use, the contents ust be carefully homogenized at elevated temperature. We recommend also the same preheating temperature to prevent air entrapment.

In automatic feeding and mixing installations, both components are degassed and homogenized under a vacuum of about 2 - 5 mbar in separate holding tanks. From time to time the prefilled products are agitated to avoid any sedimentation and irregular metering. After dosing and mixing with a static mixer, the system is fed directly to the vacuum casting chamber or, in case of the automatic pressure gelation process, directly to the hot casting mold. Several individual casting stations can be fed via separate feeding tubes. The effective pot-life of the mixed system is about 1 to 2 days at temperatures below 25°C (77ºF). 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 must be cooled and cleaned with the resin component to prevent sedimentation and/or undesired viscosity increase. Interruptions over a weekend without cleaning are possible if the pipes are cooled at temperatures below 18°C (64ºF).

Mold temperature

• APG process 130 - 160°C (266 – 320ºF)
• Conventional vacuum casting 80 - 100°C (176 – 212ºF)

Demolding times (depending on mold temperature and casting volume)

• APG process 10 - 40 minutes
• Conventional vacuum casting 4 – 8 hours

Cure conditions (minimal postcure)

• APG process -  2 hours at 150°C (302ºF) or  5 hours at 140°C (284ºF)
• Conventional vacuum casting 2 hours at 150°C (302ºF) or 5 hours at 140°C (284ºF)

Huntsman Advanced Materials Americas LLC maintains up–to-date Material Safety Data Sheets (MSDS) on all of its products. These sheets contain pertinent information that you may need to protect your employees and customers against any known health or safety hazards associated with our products. Users should review the latest MSDS to determine possible health hazards and appropriate precautions to implement prior to using this material.

• Araldite® CW 5908 resin: If only part of container is used, re-close to prevent contamination.
• Aradur® HW 5909 hardener: This product is moisture sensitive and packaged under a blanket of dry nitrogen. Maintain factory seal. If only part of container is used, blanket with dry nitrogen and tightly re-seal.

• ARALDITE® CW 5908 Resin contains some curing catalyst and / or accelerator. It should preferably not be stored for long periods at temperatures exceeding 30°C nor should it be exposed to temperatures in excess of 100°C for more than 2 hours. Incorrect handling will result in an increase in viscosity and reduced performance properties of the cured system.
• ARADUR® HW 5909 Hardener contains some curing catalysts and / or accelerators. Storage at elevated temperatures (>80°C) for extended periods (e.g., >5 days) will result in an undesirable increase in viscosity and impaired reactivity of the mixed system. This hardener is sensitive to moisture. Partially used containers should be closed immediately after use. Nitrogen blanketing is highly recommended as well as the use of a desiccant venting device unless the material is going to be used rapidly after opening.
• ARALDITE® CW 5908 Resin and ARADUR® HW 5909 Hardener should be stored in a dry place, in the sealed original container, at temperatures between 2°C and 40°C (35.6°F and 104°F). Under these storage conditions the shelf life is 6 months (from date of manufacture). The product should not be exposed to direct sunlight. As with most pre-filled systems, the fillers present in these components have a tendency to separate during storage. This filler separation will not negatively affect the final product properties and quality provided that both components are thoroughly homogenized. The filled components should be stirred carefully by using a low shear mixer prior to processing. Do not use high speed or high shear mixers and take precautions to prevent air entrapment.

ARALDITE® CW 5908 resin with ARADUR® HW 5909 hardener should be stored in a dry place, in the sealed original container, at temperatures between 2°C and +40°C (35.6°F and 104°F). Under these storage conditions, the shelf life is 1 year. The product should not be exposed to direct sunlight.