LOCTITE 4031
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
- Low-Odor Cyanoacrylate Adhesive
- Low-Blooming Adhesive Cure
- Medical-Device Bonding Applications
Product Description
LOCTITE® 4031™ is a one-component, high-viscosity alkoxyethyl cyanoacrylate adhesive developed for rapid bonding applications requiring low odor and low blooming performance. The transparent adhesive cures quickly upon exposure to ambient humidity and provides strong adhesion to metals, plastics and elastomers. Specifically designed for medical device assembly, LOCTITE 4031 has been evaluated using ISO 10993-based biocompatibility testing protocols, making it suitable for disposable medical device manufacturing. Its low-whitening characteristics, excellent sterilization resistance and dependable mechanical performance make it an ideal choice for sensitive and precision assembly applications.
Key Features & Benefits
- Low-odor alkoxyethyl cyanoacrylate formulation.
- Low blooming (low whitening) for clean, aesthetic bond lines.
- One-component adhesive requiring no mixing.
- Fast curing through exposure to ambient humidity.
- Suitable for disposable medical device assembly.
- Tested according to ISO 10993-based biocompatibility protocols.
- Excellent resistance to common sterilization processes.
Recommended Applications
- Disposable medical device assembly.
- Bonding metals, plastics and elastomers.
- Applications requiring low odor and low blooming performance.
- Precision assembly of small components.
- Medical and industrial manufacturing environments.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Additional Information
As-Supplied / Before-Processing Properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Technology | Cyanoacrylate | — | Humidity-cure adhesive |
| Chemical Type | Alkoxyethyl Cyanoacrylate | — | Low odor formulation |
| Appearance | Transparent, Colorless to Pale Yellow Liquid | — | Uncured |
| Components | One Component | — | No mixing required |
| Specific Gravity | 1.1 | — | 25°C |
| Viscosity | 1,100 - 1,650 | mPa·s (cP) | Brookfield LVF, Spindle 2, 12 rpm, 25°C |
| Key Substrates | Metals, Plastics and Elastomers | — | Typical bonding applications |
| Cure Mechanism | Humidity Activated | — | Ambient moisture cure |
After-Processing / Final-State Properties
| Property | Value | Unit | Condition / Method |
|---|---|---|---|
| Glass Transition Temperature (Tg) | 150 | °C | ASTM E228 |
| Coefficient of Thermal Expansion | 100 × 10⁻⁶ | K⁻¹ | ISO 11359-2 |
| Thermal Conductivity | 0.1 | W/m·K | ISO 8302 |
| Volume Resistivity | 10 × 10¹⁵ | Ω·cm | IEC 60093 |
| Surface Resistivity | 10 × 10¹⁵ | Ω | IEC 60093 |
| Dielectric Breakdown Strength | 25 | kV/mm | IEC 60243-1 |
| Lap Shear Strength (Steel, Grit Blasted) | 14 - 22 | N/mm² | ISO 4587, 24 h @ 22°C |
| Lap Shear Strength (Aluminum) | 9 - 15 | N/mm² | ISO 4587, Etched Aluminum |
| Tensile Strength (Buna-N) | ≥4.5 | N/mm² | ISO 6922, 24 h @ 22°C |
