LOCTITE 5055
Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.
Main features
- Low-Viscosity Medical Assembly Bonding
- Fast UV/Visible Tack-Free Cure
- Tough Transparent Silicone Rubber
Product Description
LOCTITE SI 5055 is a one-component, low-viscosity alkoxy silicone adhesive that cures with UV and visible light. Typical viscosity is 200 to 850 mPa s at 25 deg C for the light-yellow transparent liquid. Under specified 365 nm exposure, its surface can become tack-free in 30 seconds or less. After cure, it forms a transparent silicone rubber with Shore A hardness of 57, 161% elongation and 9.3 N/mm^2 tensile strength under the stated conditions. The grade is used for bonding, potting, coating and sealing in disposable medical-device assemblies.
Key features
- Low-viscosity liquid: Typical viscosity is 200 to 850 mPa s at 25 deg C by Brookfield RVT.
- Fast light cure: A tack-free surface develops in 30 seconds or less under specified 365 nm exposure.
- Transparent elastomer: The cured silicone combines Shore A 57 hardness with 161% elongation under the stated cure.
Applications
Bonding, potting, coating and sealing, particularly for disposable medical-device assemblies.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Mechanical Properties
Other Properties
Additional Information
As-supplied / before-processing properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Light yellow, transparent liquid | Uncured; LMS | |
| Specific gravity | 0.98 | Typical; uncured | |
| Viscosity | 200 to 850 | mPa s | LMS; Brookfield RVT; spindle 2; 20 rpm; 25 deg C |
After-processing / final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Shore hardness | 57 | Shore A | Typical; ISO 868; 70 mW/cm^2 at 365 nm for 60 s/side, then 24 h at 22 deg C/50 +/- 5% RH |
| Elongation at break | 161 | % | Typical; ISO 527-3; stated light cure plus 24 h at 22 deg C/50 +/- 5% RH |
| Tensile strength at break | 9.3 | N/mm^2 | Typical; ISO 527-3; stated light cure plus 24 h at 22 deg C/50 +/- 5% RH |
| Dielectric breakdown strength | 15.3 | kV/mm | Typical; IEC 60243-1; stated light cure plus 24 h at 22 deg C/50 +/- 5% RH |
| Volume resistivity | 1.10 x 10^15 | ohm cm | Typical; IEC 60093; stated light cure plus 24 h at 22 deg C/50 +/- 5% RH |
| Lap shear strength - polycarbonate to aluminum | 4.5 | N/mm^2 | Typical; UV-transmitting polycarbonate; stated light cure plus 24 h at 22 deg C/50 +/- 5% RH |
