Description
PERMABOND® TA4246 is a 2-part, no-mix, room temperature curing structural adhesive. It is ideal for use on a wide variety of substrate materials and forms a very high strength structural bond with excellent environmental durability and chemical resistance. It has high peel strength and excellent impact resistance and can be used to replace rivets or welding to give a more lightweight, durable assembly. Use with Permabond® Initiator 46.
NSN: 8040-01-580-8007
Features and Benefits
- Adhesion to a wide variety of substrates
- Fast cure at room temperature
- No mix application
- Very high shear and peel strength
- Excellent impact strength
- Good chemical resistance
Physical Properties of Uncured Adhesive
| Chemical composition | Methyl methacrylate |
| Appearance | Amber liquid |
| Viscosity @ 25°C | 20rpm: 15,000 – 30,000 mPa.s (cP) |
| Specific gravity (resin) | 1 |
Typical Curing Properties (with Initiator 46)
| Ratio of Use | 10:1 approximately |
| Maximum Gap Fill | 0.5 mm (0.02 in) |
| Fixture time (aluminium) @23°C | No gap: 1-2 mins |
| Handling time (aluminium) (0.3 N/mm² shear strength is achieved) @23°C | No gap: 2-4 mins |
| Working strength (aluminium) @23°C | No gap: 15-30 mins |
| Full cure @23°C | 24 hours |
Typical Performance of Cured Adhesive
| Shear strength (ISO4587)* | Mild steel: 33-35 N/mm² (4800-5100 psi) Aluminium: 20-30 N/mm² (2900-4350 psi) |
| Peel strength (aluminium) (ISO 4578) | 150-180 N/25mm (33-40 PIW) |
| Tensile strength (ISO37) | 30N/mm² (4350 psi) |
| Impact strength (ASTM D-950) | 50-60 kJ/m² |
| Coefficient of thermal expansion (ASTM D-696) | 80 x 10-6 1/K |
| Thermal conductivity (ASTM C-177) | 0.1 W/(m.K) |
| Dielectric constant (ASTM D150) | 4.6 |
| Dielectric strength (ASTM D149) | 30-50 kV/mm |
| Volume resistivity (ASTM D257) | 2 x 1013 Ohm.cm |
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