PERMABOND UV645
Harmonization Code : 3907.30.00.40 | Epoxy Mold Compounds containing by weight more than 70 % silicon dioxide
Main features
- High-Viscosity Controlled Application
- Fast 2 to 10 Second Fixture
- Flexible Plastic-Bonding Cure
Product Description
Permabond UV645 is a single-part, high-viscosity methacrylate adhesive for fast UV bonding of plastics, including acrylic and polycarbonate, with additional use on glass and metals. The clear formulation cures across 365 to 420 nm and provides typical fixture times from 2 to 10 seconds under the listed lamp conditions. At 25 deg C, viscosity is 8,000 to 10,000 mPa s at 20 rpm. The cured adhesive combines more than 70% elongation with 50 to 65 Shore D hardness and measured shear strength on polycarbonate, PVC, PC/ABS, and acrylic.
Key features
- High-Viscosity Application Control: Viscosity is 8,000 to 10,000 mPa s at 25 deg C and 20 rpm.
- Fast UV Fixture: Typical fixture time is 2 to 10 seconds under the listed lamp conditions.
- Flexible Cured Bond: The cured adhesive provides more than 70% elongation with 50 to 65 Shore D hardness.
Applications
Applications include bonding acrylic, polycarbonate, PVC, PC/ABS, glass, and metal, plus supported UV-curable sealing applications.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Appearance
Colorless, clear
Appearance at room temperature.
Refractive index
>1.490
The refractive index determines how much the path of light is bent, or refracted, when entering a material. It is calculated by taking into account the velocity of light in vacuum compared to the velocity of light in the material.
The refractive index calculation can be affected by the wavelength of light and the temperature of the material. Even though it is usually reported on standard wavelengths it is advised to check the TDS for the precise test parameters.
Specific Gravity
1.1
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.
Physical Properties
Viscosity
8,000-10,000 | 30,000-60,000 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
>70 %
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.
Electrical Properties
Dielectric Strength
25-30 kV/mm
Dielectric strength is measured in kV per mm and is calculated by the Breakdown voltage divided by the thickness of the tested material.
Those two properties go hand in hand and while Breakdown voltage is always thickness dependent, dielectric strength is a general material property.
As an example, the dielectric strength of Polyimide is 236 kV/mm. If we place 1mm of Polyimide between two electrodes, it will act as an insulator until the voltage between the electrodes reaches 236 kV. At this point it will start acting as a good conductor, causing sparks, potential punctures and current flow.
Chemical Properties
Water Absorption
<5 %
Other Properties
Storage Temperature
5 - 25 °C
Additional Information
Technical properties
As-supplied / before-processing properties
Fixture time depends on lamp output, distance, and substrate transmission.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Chemical composition | Methacrylate ester | As supplied | |
| Appearance | Colorless, clear | As supplied | |
| Viscosity | 8,000 to 10,000 | mPa s | At 25 deg C; 20 rpm |
| Viscosity | 30,000 to 60,000 | mPa s | At 25 deg C; 2.5 rpm |
| Specific gravity | 1.1 | As supplied | |
| Typical fixture time | 2 to 10 | seconds | Listed UV lamp conditions |
| Cure wavelength | 365 to 420 | nm | Match lamp output to the photoinitiator |
Technical properties
After-processing / final-state properties
Values are typical cured properties for the stated methods and substrates.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Overlap shear strength - polycarbonate | >9 | N/mm^2 | ISO 4587; substrate failure observed |
| Overlap shear strength - PVC | >5 | N/mm^2 | ISO 4587 |
| Overlap shear strength - PC/ABS | >7 | N/mm^2 | ISO 4587; substrate failure observed |
| Overlap shear strength - acrylic | >1.5 | N/mm^2 | ISO 4587; substrate failure observed |
| Tensile strength | 11 | N/mm^2 | ISO 37 |
| Elongation at break | >70 | % | ISO 37 |
| Hardness | 50 to 65 | Shore D | ISO 868 |
| Dielectric strength | 25 to 30 | kV/mm | Typical cured value |
