PERMABOND TA439
Harmonization Code : 2901.10.00.00 | Acyclic hydrocarbons; Saturated
Main features
- 20-40 Second Structural Fixture
- Low-Viscosity 0.15 mm Gap Bonding
- High Peel and Impact Resistance
Product Description
Permabond TA439 is a low-viscosity no-mix structural acrylic adhesive for metals, ferrites, ceramics and selected plastics. It is used with separately applied Initiator 41 or 41M, or Initiator 43 for plastics. At 25 deg C, viscosity is 600-1,200 cP and maximum gap fill is 0.15 mm. On mild steel at 23 deg C, typical fixture time is 20-40 seconds and handling strength is reached in 40-75 seconds. After cure, typical mild-steel lap-shear strength is 20-25 N/mm2, aluminum peel strength is 85-100 N/25 mm, and impact strength is 15-20 kJ/m2.
Key features
- 20-40 second fixture on mild steel: Typical fixture time is 20-40 seconds at 23 deg C, with handling strength in 40-75 seconds.
- Low-viscosity close-fitting bonding: Viscosity is 600-1,200 cP at 25 deg C with maximum gap fill of 0.15 mm.
- High peel and impact resistance: Typical aluminum peel strength is 85-100 N/25 mm to ISO 4578 and impact strength is 15-20 kJ/m2 to ASTM D-950.
Applications
Structural bonding of metals, ferrites and ceramics; bonding selected plastics.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Appearance
Transparent amber liquid
Appearance at room temperature.
Chemistry Type
Urethane methacrylate
Specific Gravity
1.0
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
600-1,200 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
Electrical Properties
Dielectric Strength
30 - 50 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.
Thermal Properties
Thermal Conductivity
0.1 W/m.K
Thermal conductivity describes the ability of a material to conduct heat. It is required by power packages in order to dissipate heat and maintain stable electrical performance.
Thermal conductivity units are [W/(m K)] in the SI system and [Btu/(hr ft °F)] in the Imperial system.
Additional Information
Technical properties
As-supplied / before-processing properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Chemical composition | Urethane methacrylate | - | Uncured adhesive |
| Viscosity at 20 rpm | 600-1,200 | cP | 25 deg C |
| Specific gravity | 1.0 | - | Uncured resin |
| Maximum gap fill | 0.15 | mm | With Initiator 41 or 41M |
Technical properties
After-processing / final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Lap-shear strength | 20-25 | N/mm2 | Typical cured joint; mild steel; ISO 4587 |
| Peel strength | 85-100 | N/25 mm | Typical cured joint; aluminum; ISO 4578 |
| Tensile strength | 25-30 | N/mm2 | Typical cured adhesive; ISO 37 |
| Impact strength | 15-20 | kJ/m2 | Typical cured adhesive; ASTM D-950 |
