LOCTITE 3936
Harmonization Code : 3907.30.00.40 | Epoxy Mold Compounds containing by weight more than 70 % silicon dioxide
Main features
- Medium-Viscosity Gap Control
- Sub-Five-Second Light Fixturing
- Flexible Cannula Bonding
Product Description
LOCTITE AA 3936 is a one-component, medium-viscosity UV/visible-light acrylic adhesive for cannula bonding and precision medical-device assembly. The transparent-to-slightly-hazy liquid requires no mixing, fluoresces under UV light, and reaches fixture strength in under 5 seconds under the specified 365 nm light conditions. Its 8,000 to 14,000 mPa s viscosity is suited to dispensing adhesive on the cannula before hub assembly, larger cannula-to-hub gaps, and geometries where the cannula ends in the core pin bore. After cure, the material has 300% elongation and Shore D 55. Applications include hubs, syringes, and lancets using stainless steel cannulae.
Key features
- Medium-Viscosity Placement: The 8,000 to 14,000 mPa s range supports pre-applied cannula adhesive and larger hub gaps.
- Sub-Five-Second Fixture: Fixture strength develops in under 5 seconds at the listed 365 nm light conditions.
- Flexible Cured Material: The cured adhesive provides 300% elongation with Shore D 55 hardness.
Applications / Suitable for
- Bonding stainless steel cannulae into hubs
- Larger-gap cannula-to-hub joints
- Syringe and lancet needle assembly
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Thermal Properties
Physical Properties
Chemical Properties
Mechanical Properties
Additional Information
As-supplied / before-processing properties
Typical values for the uncured or as-supplied product unless otherwise noted.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Transparent to slightly hazy | - | Uncured |
| UV fluorescence | Positive | - | Uncured material under UV light |
| Specific gravity | 1.1 | - | 25 deg C |
| Viscosity | 8,000 to 14,000 | mPa s | Brookfield RVT, spindle 5, 20 rpm, 25 deg C |
After-processing / final-state properties
Typical values for the cured product under the listed methods and conditions.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Glass transition temperature | 66 | deg C | ASTM E 228; cured 30 seconds per side at 100 mW/cm^2 and 365 nm |
| Shore hardness | 55 | Durometer D | ISO 868; same cure |
| Elongation at break | 300 | % | ISO 527-3; same cure |
| Tensile strength | 19 | N/mm^2 | ISO 527-3; same cure |
| Tensile modulus | 169 | N/mm^2 | ISO 527-3; same cure |
| Block shear strength | 19.0 | N/mm^2 | ISO 13445; polycarbonate to polycarbonate; cured 30 seconds at 100 mW/cm^2 and 365 nm |
