LOCTITE 40H
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- Ultra-Low-Viscosity Wicking
- Fast EPDM Fixturing
- Preassembled Plastic Bonding
Product Description
LOCTITE 40H is a one-part ethyl cyanoacrylate wicking adhesive for preassembled and close-fitting parts. Its 2 to 9 mPa s viscosity at 22 deg C allows it to flow into fitted plastic assemblies and transformer laminations, while atmospheric moisture initiates cure. Fixture time on EPDM is <=5 seconds under the stated test conditions. At least 24 hours of cure is required for full chemical/solvent resistance. Aluminum-to-aluminum tensile strength is 25.5 N/mm^2 following a 24-hour cure at 22 deg C. Applications include wicking into preassembled plastic parts, bonding transformer laminations, and locking fitted components.
Key features
- Ultra-Low-Viscosity Wicking: Viscosity is 2 to 9 mPa s at 22 deg C.
- Fast EPDM Fixture: Fixture time on EPDM is <=5 seconds under the stated conditions.
- Preassembled Plastic Bonding: The wicking grade flows into fitted plastic parts.
Applications
Applications include wicking into preassembled plastic parts, bonding transformer laminations, and locking close-fitted components.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Other Properties
Additional Information
As-Supplied Properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Transparent, colorless to straw-colored liquid | - | Uncured |
| Viscosity | 2 to 9 | mPa s | Cone and plate, 22 deg C, shear rate 3,000 s^-1 |
| Color | <=15 | APHA | As supplied |
Final-State Properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Coefficient of thermal expansion | 227 x 10^-6 | K^-1 | ISO 11359-2; cured 24 h at 22 deg C |
| Softening point | 165 | deg C | DIN EN 1427; cured 24 h at 22 deg C |
| Refractive index | 1.49 | nD20 | Cured 24 h at 22 deg C |
| Dielectric constant | 5.4 | - | IEC 60250; 1 kHz; cured 24 h at 22 deg C |
| Dielectric breakdown strength | 11.6 | kV/mm | IEC 60243-1; cured 24 h at 22 deg C |
| Tensile strength | 25.5 | N/mm^2 | ISO 6922; aluminum to aluminum; cured 24 h at 22 deg C |
