• Item Name: LOCTITE® 4305
• Manufacturer: Henkel
• Technologies: Cyanoacrylate/UV
• Color: Transparent, light yellow-green to dark blue-green
• 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® 4305 is a one-part, UV/Visible light-curable ethyl cyanoacrylate adhesive with secondary humidity cure. It provides rapid fixturing, fillet cure, and surface cure, minimizing blooming and eliminating the need for solvent-borne accelerators. The adhesive is suitable for bonding plastics, rubbers, and metals and is commonly used in medical device assembly. LOCTITE® 4305 meets Henkel’s ISO 10993 biocompatibility protocol.
| Property | Value |
|---|---|
| Specific Gravity @ 25°C | 1.07 |
| Viscosity (mPa·s) | 600 – 1,200 |
| Appearance | Transparent, light yellow-green to dark blue-green liquid |
| Cure Method | Depth of Cure (mm) | Cure Time (seconds) |
| Electrodeless H bulb, 100 mW/cm² @ 365 nm | 10 | 30 |
| Electrodeless V bulb, 100 mW/cm² @ 400 nm | 10 | 30 |
| Zeta® 7400, 30 mW/cm² @ 365 nm | 10 | 30 |
Tack Free Time
| Light Source | Power | Time (seconds) |
| Electrodeless V bulb | 100 mW/cm² @ 400 nm | ≤5 |
| Electrodeless H bulb | 100 mW/cm² @ 365 nm | ≤5 |
| Zeta® 7400 | 30 mW/cm² @ 365 nm | ≤5 |
| Property | Value |
| Coefficient of Thermal Expansion | 74.7 x 10⁻⁶ K⁻¹ |
| Glass Transition Temperature | 106°C |
| Volume Shrinkage | 12.8% |
| Shore Hardness (D) | 77 |
| Elongation at Break | 5.5% |
| Tensile Strength | 42 N/mm² (6,090 psi) |
| Tensile Modulus | 1,700 N/mm² (246,565 psi) |
| Property | Value |
| Volume Resistivity | 7.43 x 10¹⁵ Ω·cm |
| Surface Resistivity | 1.38 x 10¹⁵ Ω |
| Dielectric Breakdown Strength | 33.5 kV/mm |
| Dielectric Constant (1 kHz) | 3.67 |
| Dissipation Factor (1 kHz) | 0.041 |
| Substrate | Strength (N/mm²) | Strength (psi) |
| ABS | 35.7 | 5,170 |
| Acrylic | 14.1 | 2,050 |
| Aluminum (etched) | 17.9 | 2,600 |
| Polycarbonate | 14.1 | 2,050 |
| Steel (grit blasted) | 22.5 | 3,265 |
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