LOCTITE AA 3951
Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.
Main features
- Low-Viscosity Flexible Bonding
- Rapid 405 nm Light Fixture
- High-Elongation Cured Bond
Product Description
LOCTITE AA 3951 is a one-part, low-viscosity UV/visible-light-curing acrylated urethane adhesive for flexible medical-device assembly. The transparent material is designed for bonding plasticized PVC, thermoplastic elastomers, and thermoset rubbers to compatible rigid substrates. On glass, fixture is achieved in 5 seconds or less with 405 nm LED light at 10 mW/cm^2. After 10 seconds at 1 W/cm^2 and 405 nm, typical cured properties include 251% elongation and 22.92 N/mm^2 tensile strength. UV fluorescence supports adhesive-presence inspection, while cure response and bond performance remain dependent on light delivery, substrate, surface condition, and joint geometry.
Key features
- Low-viscosity flexible bonding: Cone-and-plate viscosity is 70 to 300 mPa s (cP) at 25 deg C and a shear rate of 200 s^-1.
- Rapid 405 nm fixture: Fixture is 5 seconds or less on glass at 10 mW/cm^2 measured at 405 nm.
- High cured elongation: Typical elongation at break is 251% after 10 seconds at 1 W/cm^2 and 405 nm.
Applications
Bonding flexible medical-device materials including plasticized PVC, TPE and thermoset rubber to compatible rigid substrates.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Mechanical Properties
Chemical Properties
Other Properties
Additional Information
As-supplied / before-processing properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Transparent, colorless to straw liquid | Uncured | |
| UV fluorescence | Positive | Under UV light | |
| Specific gravity | Approx. 1.05 | 25 deg C | |
| Cone and plate viscosity | 70 to 300 | mPa s (cP) | 25 deg C; 200 s^-1 |
After-processing / final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Shore hardness | 62 | Durometer D | ISO 868; 1 W/cm^2 at 405 nm for 10 s |
| Elongation at break | 251 | % | ISO 527-3; 1 W/cm^2 at 405 nm for 10 s |
| Tensile strength | 22.92 | N/mm^2 | ISO 527-3; 1 W/cm^2 at 405 nm for 10 s |
| PC-to-PVC block shear | 7.7 | N/mm^2 | ISO 13445; 1 W/cm^2 at 405 nm for 10 s |
| Grit-blasted PC-to-PC block shear | 22.5 | N/mm^2 | ISO 13445; 1 W/cm^2 at 405 nm for 10 s |
