PERMABOND UV625
Harmonization Code : 3907.30.00.40 | Epoxy Mold Compounds containing by weight more than 70 % silicon dioxide
Main features
- Non-Drip Vertical Bonding
- Larger-Gap UV Application
- Flexible Impact-Resistant Cure
Product Description
Permabond UV625 is a single-part, non-drip methacrylate gel for UV-curing glass-to-metal bonds and seals. Its gel-like, shear-dependent viscosity supports vertical surfaces and larger gaps while limiting flow before cure. Typical fixture time ranges from 5 seconds with a 4 mW/cm^2 battery lamp to 1 second with a 30 W/cm^2 light guide across a 365 to 400 nm cure range. The cured adhesive is tough and flexible, with typical tensile strength of 16 N/mm^2, elongation above 60%, and steel-to-glass tensile strength of 6 to 10 N/mm^2.
Key features
- Non-Drip Vertical Application: Gel-like rheology limits flow on vertical bonding and sealing surfaces.
- Larger-Gap UV Bonding: Good depth of cure supports larger-gap UV applications.
- Flexible Impact-Resistant Cure: Cures to a tough, flexible bond with good impact resistance.
Applications
Applications include glass-to-metal bonding and sealing, vertical assemblies, and UV-curable joints with larger gaps.
Technical Specifications
No specifications available.
Additional Information
As-supplied / before-processing properties
Fixture time depends on lamp power, spectral output, distance, and substrate transmission.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Chemical composition | Methacrylate ester | As supplied | |
| Appearance | Colorless gel | As supplied | |
| Viscosity | 30,000 to 55,000 | mPa s | At 25 deg C; 20 rpm |
| Viscosity | 120,000 to 250,000 | mPa s | At 25 deg C; 2.5 rpm |
| Specific gravity | 1.0 | As supplied | |
| Fixture time | 5 | seconds | 4 mW/cm^2 battery lamp |
| Fixture time | 2 | seconds | 100 mW/cm^2 LED lamp |
| Cure wavelength | 365 to 400 | nm | Match lamp output to the photoinitiator |
After-processing / final-state properties
Strength and dielectric values are typical cured results for the stated methods.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Steel-to-glass tensile strength | 6 to 10 | N/mm^2 | ASTM D-2095-69 |
| Tensile strength | 16 | N/mm^2 | ISO 37 |
| Refractive index | >1.490 | Cured adhesive | |
| Elongation | >60 | % | ISO 37 |
| Hardness | 60 to 70 | Shore D | ISO 868 |
| Dielectric strength | 12 | kV/mm | Typical cured value |
| Dielectric constant | 4 | 1 MHz at 25 deg C | |
| Water absorption | <4 | % | ISO 62; 2 hours in boiling water |
