Propower Epoxy Resin Features: High electrical insulating characteristics Non-toxic Good thermal conductivity Low shrinkage High adhesion Non-toxic Flame retardant to UL94-V0 at 3 mm Good chemical and water resistance Meets the requirements of WEEE Description: Epoxy resin is a non-toxic general purpose flame retardant potting and encapsulating compound has a long usable life and may be hot or cold cured. The system exhibits good surface finish, high electrical strength, good thermal conductivity, low exothermic and low cure shrinkage. The semi-flexible nature allows thermal expansion without cured stress and this makes compatible with most circuit board components and materials over a wide temperature range Adhesion is excellent to most plastics and substrates. The combination of properties and the ease of use of the material will lend itself to a wide range of applications. does not contain halogens or heavy metals and is available in bulk, kit or twin pack form. The standard colour is black but other colours are available on request Specification Table Property Mixed Colour Black Specific Gravity g / ml 1.7 Viscosity m.Pa.s at 25C 9,000 Maximum Ratio by Volume 4.8: 1 Maximum Ratio by Weight 8.6: 1 Usable life (150 g at 25C) 120 Minutes Gel Time (150 g at 25C) 360 Minutes Approvals UL94-V0 Yes REACH (SVHC concentration) 0% Cure Schedule Minimum cure Full cure 24 hours at 20C 1 week 2 hours at 60C 4 hours 1 hour at 80C 2 hours www.element14.com www.farnell.com www.newark.com www.cpc.co.uk Page <1> 05/05/12 V1.1Propower Epoxy Resin The above are typical values and will vary depending on the cured mass and application. Hotter temperatures may be used for faster cure but will result in higher post cure shrinkage and higher cure exothermic. Experimentation and testing is suggested to avoid side effects. For maximum properties a post cure may be required Typical Properties Peak Exothermic (150 g at 25C) 40 Shrinkage % (Volume) 0.3 Thermal Conductivity 0.85 W / m K Operating Temperature Range -55 to +130C (application and geometry dependent) Electric Strength 18 kV / mm Volume Resistivity 11 Log 10 - cm Shore D Hardness 80 Flammability UL94-VO 3 mm Tensile Strength 50 mPa Compressive Strength 60 mPa Deflection Temperature 50C Co-efficient of Expansion 35 - 55 ppm / C Loss Tangent 0.06 at 50Hz Permittivity 4.8 at 50 Hz Continuous Tracking Index > 850 V Water Absorption 0.3% (30 days at 20C) Elongation at Break 2 - 5% Availability Available through Twin Packs Twin packs are pre-weighed resin and hardener contained in a tough flexible film, separated by a removable clip and rail. Once the clip and rail is removed the resin and hardener can be thoroughly mixed within the bag and is then ready for use. Mixing will normally take to 3 minutes depending on the operator and viscosity of the material. Twin packs are ideal for small to medium production runs, prototyping and on-site or field use. Light sediment may be re-dispersed by carefully warming (to avoid distortion of the clip and rail) and kneading the pack. The twin pack weight /volume may also be tailored to a specific size on request. The use of twin packs results in reduced chemical handling and less environmental impact as the waste product is inert Bulk Material Is a filled system and formulated to avoid sedimentation. However, if sediment is found after storage, this must be re-dispersed in the original container before use. Failure to do so may result in defective product. Long-term sedimentation will be aggravated by storage above 25C and should be avoided. In bulk or kit form gentle mixing with a paddle or spatula will homogenise the material. In bulk or kit form evacuation may be necessary for best results www.element14.com www.farnell.com www.newark.com www.cpc.co.uk Page <2> 05/05/12 V1.1