Physical Properties of Uncured Adhesive
|
TA4820 A |
TA4820 B |
Chemical composition |
Methyl methacrylate |
Methyl methacrylate |
Colour |
Off-white |
Amber |
Mixed colour |
Cream |
|
Viscosity @ 25°C |
200,000-300,000 mPa.s (cP) |
120,000-200,000 mPa.s (cP) |
Specific gravity |
1.0 |
1.0 |
Typical Curing Properties
Ratio of use |
1 : 1 |
Maximum gap fill |
2 mm (0.08 in) |
Pot life (10g+10g) @23°C |
10-15 minutes |
Fixture time @23°C |
25-35 minutes |
Handling time (0.3 N/mm² shear strength is achieved) @23°C |
45-60 minutes |
Working strength @23°C |
100-120 minutes |
Full cure @23°C |
24 hours |
Typical Performance of Cured Adhesive
Shear strength* (ISO4587) |
Steel: 21-28 N/mm² (3000-4000 psi) Aluminium: 17-24 N/mm² (2500-3500 psi) PPO to HIPS: Substrate failure PVC to PVC: Substrate failure SMC to SMC: Substrate failure Fiber glass to Fiber glass: >12 N/mm² (1700 psi) |
Tensile strength (ISO37) |
29 N/mm² (4200 psi) |
Peel strength (ISO 4578) |
70-90 N/25mm (15-20 PIW) |
Elongation (ISO37) |
15-20% |
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 D-150) |
4.6 MHz |
Dielectric strength (ASTM D-149) |
30-50 kV/mm |
Volume resistivity (ASTM D-257) |
2 x 1013 Ohm.cm |