Enhanced TDS
Identification & Functionality
- Chemical Family
- RTU Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Key Properties
- Good heat resistance.
- Good resistance to atmospheric and chemical degradation.
Applications & Uses
- Composites Processing Methods
- Product End Uses
- Processing Methods
Casting, vacuum casting.
- Application Information
Encapsulating or potting of low voltage and electronic components.
Regulatory & Compliance
- Certifications & Compliance
Technical Details & Test Data
- Processing
Mixing
Measure (by weight or volume) the Araldite resin and the hardener. Add the hardener to the Araldite resin; making sure that the required amount of hardener is transferred to the resin. Stir thoroughly until mixing is complete. Air entrainment during mixing results in pores in the cured resin. Mixing under vacuum or in a metering-mixing machine is the most effective way to prevent air entrainment. Alternatively the static resin – hardener mixture may be deaerated in a vacuum chamber – allowing at least 200 % ullage for the foam to expand.
Curing
The chemical reaction initiated by mixing resin and hardener results in the generation of exothermic heat. The peak temperatures attained are determined by the starting temperature and the size and shape of the casting. Unfilled resin systems are suitable only for manufacturing castings weighing up to about 500 grams. Mineral filler should be added to dissipate heat and damp the exothermic reaction when producing large castings. There is very little exothermic reaction when producing very small castings or thin layers as the heat generated is rapidly dissipated. Cure is consequently delayed and the surfaces of castings may remain tacky. In such cases an infrared heater or oven at 40°C – 60°C should be used to effect full cure. When casting thick sections special care is needed to avoid excessive exothermic temperature rise. Short high-temperature curing schedules should not be used unless preliminary trials with castings manufactured to the specific design, and in the specified moulds, produce no unacceptable exothermic effects. To determine whether cross-linking 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 gel and cure cycles in the customer’s manufacturing process could lead to a different degree of cross-linking and thus a different glass transition temperature.
- Cured Properties
Color of Casting Yellow - brown at 23°C, Cured for 6 hours at RT + 6 hours at 60°C
Density 1.1 g/cm³ ISO 1183 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C
Glass Transition Temperature 37 °C ISO 11357-2 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C
Flexural Strength 19.5 MPa ISO 178 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C
Flexural Modulus 320 MPa ISO 178 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C
Hardness 64 Shore D ISO 868 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C
Tensile Strength 17.6 MPa ISO 527 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C
Elongation at Break 31 % ISO 527 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C
Tensile Modulus 372 MPa ISO 527 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C
Impact Strength 44 kJ/m² ISO 179 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C
Water Absorption 1.04 % by wt. ISO 62 at 23°C, for 10 days, Cured for 6 hours at RT + 6 hours at 60°C
Water Absorption 0.54 % by wt. ISO 62 at 100°C, for 30 min, Cured for 6 hours at RT + 6 hours at 60°C
Dielectric Strength 24 kV/mm IEC 60243-1 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C, 2 mm specimen
Dielectric Loss Factor 5.2 % IEC 60250 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C, tan δ, 50Hz, 25°C
Dielectric Constant 4.8 IEC 60250 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C, εr, 50Hz, 25°C
Volume Resistivity 9 x 10¹³ Ω cm IEC 60093 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C, ρ, 25°C
Tracking Resistance min. 600 - 0.4 CTI IEC 112/79 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C
Electrolytic Corrosion A - 1 grade IEC 60426 at 23°C, Cured for 6 hours at RT + 6 hours at 60°C
- Processing Guidelines
Mix Viscosity at 25°C Araldite DBF / HY 842 Rheomat mPa*s 1400 Mix Viscosity at 40°C
550 Pot life at 25°C Araldite DBF / HY 842 Time to reach 5000 mPa*s min 129 Time to reach 15000 mPa*s min 202 Pot life at 40°C Araldite DBF / HY 842 Time to reach 5000 mPa*s min 83 Time to reach 15000 mPa*s min 112 Gel time at 40°C Araldite DBF / HY 842 Gelnorm min 134 Gel time at 60°C Gelnorm min 47 Minimum Curing Cycle
24 - 48 hours at RT or 4 h at RT + 4 h at 60°C
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. For information on waste disposal and hazardous products of decomposition in the event of a fire, refer to the Material Safety Data Sheets (MSDS) for these particular products.