A room temperature curing, acid resistant adhesive system
Epoxy System 250-S is specially formulated with proper selection of fillers and pigments for low viscosity and better chemical resistance. It is ready to use filled system having low viscosity at processing temperatures.
Epoxy System 250 S can be used with Hardner Epoxy-PAM for room temperature curing adhesive or bonding application.
Characteristics of Fully Cured System
- Good adhesion to most organic and inorganic materials ( with proper etching)
- Good mechanical and electrical properties combined with
- Good chemical and water resistance
- Increased thermal conductivity
Properties
| Properties | Unit | Epoxy 250 s | Hardner PAM |
|---|---|---|---|
| & App | -- | Natural ,Thixotropic | Colorless cl liq |
| Density at 27°C | g/cc | 1.300-1.400> | 0.900-0.950 |
| Viscosity by BF at 27°C | Pass | <10, 000 -5000 | 100-300 |
| Viscosity by BF at 20 °C | Pas | 35000 -45000 | -- |
| Amine Value | -- | -- | 1200-1400 |
| Mixing Ratio | pbw | 100 | 10 |
| Gel time at RT | min | 20-30 | -- |
| Curing time at RT °C | min | 24 hrs | -- |
| Hardness after 24 hrs | Shore D | 60-75 | -- |
Properties of Cured Compound
- at 25°C - 24 hours
- at 40°C - 16 hours
Properties of Cured Compound
- Specimen cured at 16 hours RT + 4 hours 60 °C
| Flexural strength | KJ/mm2 | 57 |
| Impact strength | N/mm2 | 7 |
| Compressive strength | Pas | 95 |
| Hardness | Shore D | 85 |
| Heat distortion | °C | 75 |
Effect of Chemicals
- Specimen cured at 16 hours RT + 4 hours 60 °C
| 25% H2SO4 | % change in weight | + 0.495 |
| 25% HCL | % change in weight | + 0.35 |
| 25% NaOH | % change in weight | + 0.094 |
Application
- The Epoxy System is most suitable for bonding two similar or dissimilar surfaces with proper etching procedure.
- Specially recommended for terminal potting of Automobile batteries
- For bonding Polypropylene surface a proper etching with Sulphuric acid-dichromate Solution or LPG flame etching is recommended.
- The corona etching gives the best adhesion.
NOTE : Epoxy System 250-S is available in Plain, natural color.Epoxy Coloring Paste Red or Black could be added for coloring.