LOCTITE AA 3963
Harmonization Code : 38159000 | Unspecified reaction initiators, accelerators, and catalytic preparations
Main features
- Fast Tack-Free LED Cure
- Low-Viscosity Rigid Bonding
- Strong Polycarbonate Assembly Bonds
Product Description
LOCTITE AA 3963 is a one-part, low-viscosity UV/visible-light-curing acrylated urethane adhesive for rigid medical-device component bonding. The transparent, fluorescent material is designed for high adhesion to metals and plastics and supports fast LED processing. On glass, fixture is achieved in 10 seconds or less with 405 nm LED light at 10 mW/cm^2; at 1,400 mW/cm^2 and 405 nm, the surface becomes tack-free in 5 to 10 seconds. After 10 seconds at 1,000 mW/cm^2 and 405 nm, typical cured properties include 23.1 N/mm^2 tensile strength and 22.7 N/mm^2 block shear on polycarbonate. Performance remains dependent on light exposure, substrate, geometry, and surface preparation.
Key features
- Rapid tack-free LED surface cure: Tack-free time is 5 to 10 seconds at 1,400 mW/cm^2 measured at 405 nm.
- Low-viscosity rigid bonding: Cone-and-plate viscosity is 250 to 450 mPa s (cP) at 25 deg C, measured at 100 s^-1 after 180 seconds with a Physica CP50-1 cone.
- Polycarbonate bond strength: Typical polycarbonate-to-polycarbonate block shear is 22.7 N/mm^2 after 10 seconds at 1 W/cm^2 and 405 nm.
Applications
Bonding rigid metal and plastic components in medical-device assemblies.
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 | Uncured | |
| UV fluorescence | Positive | Under UV light | |
| Specific gravity | Approx. 1.02 | 25 deg C | |
| Cone and plate viscosity | 250 to 450 | mPa s (cP) | 25 deg C; CP50-1; 100 s^-1; 180 s test time |
After-processing / final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Shore hardness | 71 | Durometer D | ISO 868; 1,000 mW/cm^2 at 405 nm for 10 s |
| Elongation at break | 38 | % | ISO 527-3; 1,000 mW/cm^2 at 405 nm for 10 s |
| Tensile strength | 23.1 | N/mm^2 | ISO 527-3; 1,000 mW/cm^2 at 405 nm for 10 s |
| Glass transition temperature | 55 | deg C | ISO 11359-2; cured material |
| Polycarbonate block shear | 22.7 | N/mm^2 | ISO 13445; polycarbonate-to-polycarbonate; 1 W/cm^2 at 405 nm for 10 s |
