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Liquid Epoxy resin use in APG machine in Electric Insulations
SHANGHAI WENYOU INDUSTRY CO., LTD.
Flame Retardant Epoxy Resin
LE-9276/LH-9276 system
December 2018 edition No:2018129276
Recommended formula
Epoxy resin LE- 9276 100pbw
Hardener LH-9276 100pbw
Filler Silica powder (X10) 300-360pbw
Color paste LC series * 3pbw
Performance
The two-component flame retardant epoxy resin system is liquid at room temperature and suitable for APG injection process.
Excellent flame retardant properties, excellent cracking resistance, excellent electrical properties, and excellent process.
Application
Flame retardant medium and high voltage switch insulators
Such as: 10-35kV transformers, transformers, insulators and other related insulation parts.
Physicochemical indexes
Resin LE-9276 is a modified epoxy resin curing agent lh-9276 is a liquid modified carboxylic anhydride curing agent
| Performance | Company | Standard |
| Appearance | Visual measurement | Transparent viscous liquid |
| Epoxy value | Eq/kg | 4.0-4.5 |
| Viscosity at 25 C | Pa.s | 3.5-6.5 |
| Density at 25 C | g/cm3 | 1.19-1.30 |
| Steam pressure at 25 C | Pa | ﹤0.01 |
| Flash point | ℃ | About 125 |
| Performance | Company | Standard |
| Appearance | Visual measurement | Light brown liquid |
| Viscosity at 25 C | Pa.s | 0.3-0.8 |
| Density at 25 C | g/cm3 | 1.30-1.50 |
| Vapor pressure | Pa | About 0.5 |
| Flash point | ℃ | About 140 |
The epoxy resin le-9276, curing agent lh-9276 and a certain amount of fillers are fully mixed in vacuum, and can be cured according to the following curing process:
| Process parameters | Automatic pressure gel |
| Mixing temperature of epoxy resin curing agent | 40 centigrade 1-2 hours |
| Feeding mode | Pressure (0.5-5bar) |
| Mold temperature | 130-150℃ |
| Coagulation time | 10-30 points |
| Post cure | 130-140 degrees x 10-12 hours |
Gel time
| Temperature | Gel time |
| at 120℃ | 13-20 mins |
| at 140℃ | 5-7mins |
| at 160℃ | About 3 mins |
Physical and mechanical properties
Test system: resin LE- 9276 curing agent LH-9276 filler mixture ratio: 10001000350 curing conditions: 1400℃x2hours+140℃x8hours
| Performance | Typical results |
| Thermal decomposition temperature | ＞320℃ |
| Water absorption (23 c * 10 days) | 0.10-0.20 %by wt. |
| Water absorption (100 degrees x 60 minutes) | 0.08-0.15 %by wt. |
| Surface resistivity | 1013Ω |
| Volume resistivity | 1014Ω.cm |
| Dielectric strength | 20-30 kv/mm |
| Dielectric loss | 0.02 |
Note: the following performance data are measured according to the national standard only for users' reference. The specific application data should be determined according to the actual conditions of the users.
| Performance | Typical results |
| Tg(DSC) | 75-90℃ |
| tensile strength | 50-70N/ mm2 |
| Bending strength | 90-130N/ mm2 |
| compressive strength | 140-190N/ mm2 |
| impact strength | 6-12kJ/ m2 |
| Curing shrinkage | 0.9-1.1% |
| Fire resistance (12mm) | Level v0 |
| Thermal conductivity | 0.8-0.9W/mk |
Storage
The product should be stored in a sealed and tightly sealed original container in a dry and 6-35℃ environment. Under such conditions, the storage period should be stored. The date shown on the package label is valid (generally valid for one year). After that date, the product must be tested before it can be determined.
Whether it is still valid. If the material in the container is only used, seal and tighten immediately.
Package
Resin 20kg/barrel or 240kg/barrel, curing agent 20kg/barrel or 240kg/barrel.
First aid
When your eyes are contaminated with resins, hardener or castables, rinse with clean flowing water for 10 to 15 minutes immediately. See the doctor first aid.
Materials that should be splashed on the skin should be erased and cleaned with water. If there is serious pain or burns, see the doctor.
The dirty clothes should be replaced immediately. If they are uncomfortable due to inhalation of steam, they should be removed immediately. If there is any doubt, please contact medical help.
