Liquid electrical epoxy resin SHANGHAI WENYOU INDUSTRY CO., LTD. Outdoor epoxy resin LW-9527A/LW-9527B System Version of 2019.10 No:2019109527 | Epoxy resin | LW-9527A | 100pbw | Formulation | | Hardener | LW-9527B | 100pbw | | | Color paste | LC series * | 1 pbw | |
Viscous liquid, premixed, hot-curing two component epoxy resin
system for outdoor applications. Applicable for automatic pressure gelation process (APG). Excellent
environmental stress cracking resistance properties and high
resistance to erosion under UV-radiation. Glass transition
temperature: 75-90℃ | Properties | Outdoor electrical insulation products for medium and high voltage
applications such as 12-40.5kv insulators, current and voltage
transformers, etc. | Application | | | Product Data | | LW-9527A is a system of modified cycloaliphatic epoxy resin premix. | | LW-9527B is a system of modified saturated structure carboxylic
anhydride hardener premix. | | Properties | Unit | Value | | Properties | Unit | Value | | Appearance | Visual | Viscous liquid | | Appearance | Visual | Viscous liquid | | Filler content | %wt. | 58-63 | | Filler content | %wt. | 58-63 | | Viscosity at 70℃ | mPa.s | 900-1800 | | Viscosity at 70℃ | mPa.s | 1000-2000 | | Density at 25℃ | g/cm3 | 1.75-1.85 | | Density at 25℃ | g/cm3 | 1.75-1.85 | | Flash point | ℃ | About 135 | | Flash point | ℃ | About 140 | | | | | | | | | | Epoxy resin LW-9527A and hardener LW-9527B can be processed by
following conditions after fully mixed under vacuum conditions. | Process condition | |
| Processing parameters | Automatic pressure gelation | | Epoxy / hardener mixture temperature | 10-35℃/1-1.5 hours | | Feeding process | Pressurized (0.5-5bar) | | Mold temperature | 130-140℃ | | Gelation time | 10-60mins | | Post cure | 110-120℃×6-10 hours |
| Temperature | Gelation time | | At 120℃ | 10-20mins | | At 140℃ | 4-8mins | | At 160℃ | 1.5-3mins |
Tested system: Epoxy resin LW-9527A / Hardener LW-9527B: 100/100;
Cure conditions:120℃ × 4hours + 120℃ × 8 hours; Note: the following data are tested based on GB standard, and only
for customers’ reference, Detailed properties should be tested by
in accordance with customers’ actual conditions. | Mechanical and physical properties |
| Properties | Value | | Properties | Value | | | Glass transition temperature (DSC) | 75-90℃ | | Thermal conductivity | 0.8-0.9W / mk | | | Tensile strength | 65-90N / mm2 | | Thermal decomposition | ＞320℃ | | | Flexural strength | 95-145N / mm2 | | Water absorption (23℃×10days) | 0.10-0.20 % by wt. | | | Compressive strength | 130-180N / mm2 | | Water absorption (100℃×60 mins) | 0.08-0.15 % by wt. | | | Impact strength | 8-16kJ / m2 | | Surface resistivity | 1014Ω | | | Curing shrinkage | 0.9-1.1% | | Volume resistivity | 1015Ω.cm | | | Flammability (4mm) | HB Class | | Dielectric strength | 25-30 kV / mm | | | | | | Loss factor | 0.02 | |
| The components have to be stored in tightly sealed and dry original
containers in an environment at 6~35℃;. Under these conditions, the
shelf life will correspond to the expiration date stated on the
label ( normally 12 months). After this date, the product may be
reanalyzed to confirm if it validates yet. Partial emptied
containers should be closed tightly immediately after use. | Storage | | LW-9527A 20 or 220 or 1200kg/drum, LW-9527B 20 or 220 or
1200kg/drum; | Packing | | If eyes are contaminated by epoxy resin, hardener or mixture for
casting, the eyes should be treated and washed immediately by clean
running water for 10 to 15 minutes. If necessary, the person shall
be sent to hospital. If the skin is stained or splashed by the
materials, it shall be wiped immediately and washed off by clean
water. If the person feels very hurt or burn wounds, he or she
shall be sent to hospital immediately. If the clothes are
Contaminated, the people shall change the suits immediately. If the
operator breathes in the vapour and feel bad, he or she shall be
moved to outside. Any other doubt, please consult doctors or us for
medical assistance. | First aid |
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