• Item Name: LOCTITE® 4311™
• Manufacturer: Henkel
• Technologies: Cyanoacrylate/UV (Ethyl cyanoacrylate with photoinitiator)
• Color: Transparent, light yellow-green to dark blue-green liquid
• Cure Type: Ultraviolet (UV) / Visible light; Secondary Cure: Humidity
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.
LOCTITE® 4311™ is a one-part cyanoacrylate adhesive with UV/visible light curing and secondary humidity curing. It is designed for rapid fixturing, fillet cure, and surface cure, minimizing blooming and eliminating the need for solvent-borne accelerators. It is suitable for bonding plastics, rubbers, and metals and is compliant with ISO 10993 biocompatibility standards for medical device assembly.
| Property | Value |
|---|---|
| Appearance | Transparent, light yellow-green to dark blue-green liquid |
| Specific Gravity @ 25°C | 1.06 |
| Viscosity (mPa·s) | 600 – 1,500 |
| Fluorescence | Positive under UV light |
| Cure Method | Depth of Cure (mm) | Cure Time (s) |
|---|---|---|
| UV (365 nm, 100 mW/cm²) | 6 | 60 |
| LED (405 nm, 100 mW/cm²) | 7 | 60 |
| Tack-Free Time (365 nm, 30 mW/cm²) | ≤10 |
| Property | Value |
|---|---|
| Glass Transition Temperature (°C) | 102 |
| Shore Hardness (D) | 84 |
| Tensile Strength (MPa) | 50 |
| Elongation at Break (%) | 5.2 |
| Tensile Modulus (MPa) | 1,860 |
| Substrate | Strength (N/mm²) | Strength (psi) |
|---|---|---|
| Acrylic to Acrylic | 14.2 | 2,050 |
| Polycarbonate to Polycarbonate | 22.4 | 3,260 |
| Polycarbonate to Steel (grit blasted) | 13 | 1,880 |
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