LOCTITE 4305
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- Rapid Dual-Cure Surface Bonding
- Fast 5-Second Tack-Free Response
- Plastics, Rubbers and Metals Bonding
Product Description
LOCTITE 4305 is a one-part ethyl cyanoacrylate adhesive with photoinitiator for UV/visible light cure and secondary humidity cure. Exposed surfaces can reach a tack-free state in 5 seconds or less under specified 365 or 400 nm light conditions, while humidity provides a secondary path for non-UV regions. The material is a transparent light-yellow-green to dark-blue-green liquid with a typical viscosity of 600 to 1,200 mPa s at 25 deg C. It bonds plastics, rubbers and metals where rapid fixturing, fillet cure or surface cure is required.
Key features
- Light-and-humidity cure: UV/visible light cures exposed surfaces, with humidity as the secondary cure mechanism.
- Fast tack-free response: Specified 365 or 400 nm light conditions produce a tack-free surface in 5 seconds or less.
- Multi-substrate bonding: Bonding applications include plastics, rubbers and metals.
Applications
Rapid bonding of plastics, rubbers and metals in assemblies requiring rapid fixturing, fillet cure or exposed-surface cure.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Appearance
Transparent, light yellow-green to dark blue-green liquid
Appearance at room temperature.
Chemistry Type
Ethyl cyanoacrylate with photoinitiator
Specific Gravity
1.07
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.
For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
Other Properties
Storage Temperature
2 °C to 8 °C
Electrical Properties
Volume Resistivity
7.43×10¹⁵ Ohms⋅cm
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
Physical Properties
Viscosity
600 to 1,200 mPa.s
Viscosity is a measurement of a fluid’s resistance to flow.
Viscosity is commonly measured in centiPoise (cP). One cP is defined as
the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP.
A product like honey would have a much higher viscosity -around 10,000 cPs-
compared to water. As a result, honey would flow much slower out of a tipped glass than
water would.
The viscosity of a material can be decreased with an increase in temperature in
order to better suit an application
Mechanical Properties
Elongation
5.5 %
Elongation is the process of lengthening something.
It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks.
It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
Thermal Properties
Glass Transition Temperature (Tg)
106 °C
The glass transition temperature for organic adhesives is a temperature region where the polymers change from glassy and brittle to soft and rubbery. Increasing the temperature further continues the softening process as the viscosity drops too. Temperatures between the glass transition temperature and below the decomposition point of the adhesive are the best region for bonding.
The glass-transition temperature Tg of a material characterizes the range of temperatures over which this glass transition occurs.
Additional Information
Technical properties
As-supplied / before-processing properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Transparent, light yellow-green to dark blue-green liquid | Uncured; LMS | |
| Specific gravity | 1.07 | Typical; 25 deg C | |
| Viscosity | 600 to 1,200 | mPa s | Typical; cone and plate; 25 deg C; shear rate 100 s^-1 |
Technical properties
After-processing / final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Glass transition temperature | 106 | deg C | Typical; ASTM E 228; 100 mW/cm^2 at 400 nm for 10 s/side, then 24 h at 22 deg C |
| Shore hardness | 77 | Shore D | Typical; ISO 868; 100 mW/cm^2 at 400 nm for 10 s/side, then 24 h at 22 deg C |
| Tensile strength at break | 42 | N/mm^2 | Typical; ISO 527-3; 100 mW/cm^2 at 400 nm for 10 s/side, then 24 h at 22 deg C |
| Elongation at break | 5.5 | % | Typical; ISO 527-3; 100 mW/cm^2 at 400 nm for 10 s/side, then 24 h at 22 deg C |
| Dielectric breakdown strength | 33.5 | kV/mm | Typical; IEC 60243-1; 0.63 mm sheet; 100 mW/cm^2 at 365 nm for 10 s/side, then 24 h at 22 deg C |
| Volume resistivity | 7.43 x 10^15 | ohm cm | Typical; IEC 60093; 0.63 mm sheet; 100 mW/cm^2 at 365 nm for 10 s/side, then 24 h at 22 deg C |
