LOCTITE 4306
Harmonization Code : 3506.91.90.99 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other
Main features
- Dual-Cure Bonding Processing
- Low-Blooming Bonding Cure
- Rapid Surface and Fixture Curing
Product Description
LOCTITE® 4306™ is a one-component UV/light-curing cyanoacrylate adhesive formulated with a photoinitiator to provide ultra-fast fixture speeds, surface cure and fillet cure capabilities. The adhesive combines UV/visible light curing with a secondary moisture-cure mechanism, enabling reliable bonding of plastics, rubbers and metals while minimizing blooming. Its fluorescent properties under UV light allow easy inspection of adhesive presence and coverage. LOCTITE 4306 has been tested to Henkel protocols based on ISO 10993 biocompatibility standards and is widely used in the assembly of disposable medical devices and precision components requiring rapid processing and inspection.
Key Features & Benefits
- Dual-cure technology combining UV/visible light cure with secondary humidity cure.
- Very rapid surface and fixture curing performance.
- Fluoresces under UV light for inspection and quality control.
- Low blooming characteristics compared with conventional cyanoacrylates.
- One-component adhesive requiring no mixing.
- Suitable for plastics, rubbers and metal substrates.
- Evaluated using ISO 10993-based biocompatibility protocols for medical device applications.
Recommended Applications
- Disposable medical device assembly.
- UV-curable bonding processes requiring rapid fixture speed.
- Plastic, rubber and metal component assembly.
- Applications requiring fluorescent bond-line inspection.
- Precision manufacturing and automated assembly systems.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Additional Information
As-Supplied / Before-Processing Properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Technology | Cyanoacrylate / UV | — | Ethyl cyanoacrylate with photoinitiator |
| Chemical Type | Ethyl Cyanoacrylate | — | UV/light-curable formulation |
| Appearance | Transparent Light Yellow-Green to Dark Blue-Green Liquid | — | Uncured |
| Fluorescence | Positive Under UV Light | — | Inspection capability |
| Components | One Part | — | No mixing required |
| Specific Gravity | 1.05 | — | 25°C |
| Viscosity | 10 - 35 | mPa·s (cP) | Cone & Plate, 3,000 s⁻¹, 25°C |
| Primary Cure | UV / Visible Light | — | Light activated |
After-Processing / Final-State Properties
| Property | Value | Unit | Condition / Method |
|---|---|---|---|
| Glass Transition Temperature (Tg) | 116 | °C | ASTM E228 |
| Coefficient of Thermal Expansion (Pre Tg) | 92 × 10⁻⁶ | K⁻¹ | ISO 11359-2 |
| Shore Hardness | 82 | Shore D | ISO 868 |
| Tensile Strength | 32.5 | N/mm² | ISO 527-3 |
| Tensile Modulus | 1,730 | N/mm² | ISO 527-3 |
| Elongation at Break | 2.2 | % | ISO 527-3 |
| Volume Shrinkage | 16 | % | ASTM D792 |
| Water Absorption (7 Days @ 22°C) | 1.1 | % | ISO 62 |
| Block Shear Strength (Polycarbonate) | ≥9.0 | N/mm² | ISO 13445, UV Cured |
| Block Shear Strength (Polycarbonate to Polycarbonate) | 15.2 | N/mm² | UV Cure @ 365 nm |
