ARALDITE CW 229
Harmonization Code : 3506.91.90.99 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other
Main features
- Filled Epoxy Resin
- High-Viscosity Resin Handling
- Electrical-Insulation Resin Applications
Product Description
Araldite® CW 229 US Resin is a filled epoxy resin supplied as a beige viscous liquid for use in electrical insulation casting systems. The resin contains mechanically reinforcing fillers and is designed for processing into electrical insulation components used in indoor medium- and high-voltage applications, including SF6-insulated equipment when used as part of the designated curing system. The material is supplied in a high-viscosity liquid form suitable for conventional casting and Automatic Pressure Gelation (APG) processing methods. Araldite® CW 229 US Resin is intended for manufacturers requiring a filled epoxy resin for electrical insulation and encapsulation applications.
Key features
- Filled epoxy resin formulation: Contains mechanically reinforcing fillers for electrical insulation casting applications.
- High-viscosity liquid: Supplied as a beige viscous liquid with a viscosity of 80,000-200,000 cP at 25°C.
- Electrical insulation applications: Intended for electrical insulation components used in medium- and high-voltage equipment.
Applications / Suitable for
- Electrical insulation castings
- Electrical insulation components
- Indoor medium-voltage equipment
- Indoor high-voltage equipment
- SF6-insulated electrical equipment
- Epoxy casting and encapsulation systems
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Additional Information
Potting, Encapsulation & Electrical Casting
Heat-curing epoxy casting system for electrical insulation
ARALDITE CW 229 resin and ARADUR HW 229-1 hardener form a filled, heat-curing two-component epoxy casting system for electrically insulating components. The exact pair is documented for conventional casting and Automatic Pressure Gelation. The mixed viscosity is temperature-dependent, and the cure schedule is selected according to part mass, mold temperature, and processing method.
As supplied
Component properties
Resin and hardener values are shown separately before mixing.
| Property | ARALDITE CW 229 resin | ARADUR HW 229-1 hardener |
|---|---|---|
| Appearance | Beige viscous liquid | Beige viscous liquid |
| Density | 1.76-1.83 g/cm3 | 1.90-1.98 g/cm3 |
| Viscosity at 25 deg C | 80,000-200,000 cP | 25,000-75,000 cP |
| Flash point, closed cup | 135 deg C | 140 deg C |
Properties are based on Huntsman test methods.
Processing
Select the cure profile for the casting size and process
Processing guidance differs for smaller parts, very large parts, and APG casting. The mixed material becomes substantially less viscous as temperature rises.
- Mix ARALDITE CW 229 resin and ARADUR HW 229-1 hardener at 100:100 by weight or 100:90 by volume.
- For smaller parts, preheat the mold to 80-100 deg C, mix at 40-80 deg C, then gel for 4-6 hours at 80 deg C or 2 hours at 100 deg C before the stated post-cure.
- For very large parts, use a step or ramp cure; one example ramps from 60-80 deg C to 140 deg C over 16-24 hours, followed by 4-6 hours at 140 deg C and slow cooling before demolding.
- For APG, preheat the mold to 140-160 deg C, fill in 2-5 minutes with mixed material at 50-60 deg C, and gel under 1-3 atm for 7-15 minutes before the stated post-cure.
- Typical mixed viscosity is 35,000-65,000 cP at 25 deg C, 2,500-3,500 cP at 50 deg C, and 700-1,200 cP at 70 deg C.
Storage and handling
Keep filled components dry and homogenized before processing
Store both components in dry, sealed original containers at 2-40 deg C. Under these conditions, shelf life is 1 year from date of manufacture.
The hardener is moisture-sensitive after opening. Reseal immediately and use nitrogen blanketing or desiccant venting when material will not be used rapidly.
Because the components are prefilled, carefully homogenize them with a low-shear mixer before processing and take precautions to avoid air entrapment.
Cured system
Typical cured physical and electrical properties
These values apply to the cured ARALDITE CW 229 / ARADUR HW 229-1 system and are not properties of the hardener alone.
| Property | Typical value | Method |
|---|---|---|
| Tensile strength | 11,000-12,500 psi | ASTM D638 |
| Flexural strength | 18,000-19,000 psi | ASTM D790 |
| Hardness | Shore D 92-96 | Shore D |
| Glass transition temperature | 110-120 deg C | DSC |
| Thermal conductivity | 0.7-0.8 W/m-K | ISO 8894-2/90 |
| Dielectric strength | 420-480 V/mil at 3 mm | IEC 60243 |
| Critical stress intensity factor, K1C | 2.8-3.0 MPa-m^0.5 | Double Torsion Test |
Unless otherwise stated, these are typical values and not a product specification.
Applications
Supported applications
Use the documented application scope below as the starting point for product evaluation.
Electrical insulating components
Casting of electrically insulating components where the documented CW 229 / HW 229-1 system and cure process are appropriate.
Medium-voltage insulation
Indoor medium-voltage electrical insulation applications within the exact system's documented processing and qualification scope.
High-voltage and SF6 insulation
Indoor high-voltage applications, including SF6-insulated types, as documented for the complete system.
Technical support for ARALDITE CW 229 / ARADUR HW 229-1
Need help matching the CW 229 / HW 229-1 system to casting geometry, APG conditions, cure schedule, or electrical-property requirements? Krayden can help review the exact component pairing, processing temperatures, part mass, and qualification needs before the system is evaluated in the intended electrical assembly.
