Physical Properties of Uncured Adhesive
| PT321 A | PT321 B |
Chemical composition | Polyurethane | Isocyanate |
Appearance | Black | Cream |
Viscosity @ 25°C | 4000-8000 mPa.s (cP) Thixotropic | 3000-6000 mPa.s (cP) Thixotropic |
Specific Gravity | 1.25 | 1.45 |
Typical Curing Properties
Ratio of use | 1 : 1 by volume |
Maximum gap fill | 5 mm (0.2 in) |
Pot life | 60-90 seconds |
Handling time (steel) ISO4587 (0.3 N/mm² shear strength is achieved) | 10-15 minutes |
Full cure | @23°C: 24 hours @90°C: 30 minutes |
Typical Performance of Cured Adhesive
Shear strength* (ISO4587) | Zinc: 6-8 MPa (900 -1200 psi) Steel: 18-25 MPa (2600 -3600 psi) Carbon fibre: 6-8 MPa (900 -1200 psi) |
Tensile strength (ISO37) | 20-25 MPa (2900-3600 psi) |
Elongation at break (ISO37) | <10% |
Hardness (ISO868) | 70-80 Shore D |
Coefficient of thermal expansion (ASTM D- 696) | 85 x 10-6 1/K |