PERMABOND ES578
Harmonization Code : 3506.91.90.99 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other
Main features
- 1.0 W/(m K) Thermal Conductivity
- Heat-Activated Flow for 5 mm Gaps
- UL 94 V-0 Classification
Product Description
Permabond® ES578 is a high-performance, single-part epoxy adhesive designed to deliver both exceptional bond strength and very good thermal conductivity. Formulated to flow when heated during the cure cycle, it readily fills gaps and ensures optimal contact area for heat transfer. This combination of structural strength, thermal dissipation, and electrical insulation makes it ideal for specialized applications such as bonding aluminum heat sinks to ceramic headers.
Key features
- Thermally conductive: Provides a thermal conductivity of 1.0 W/(m.K) to effectively dissipate heat from critical components.
- Fire retardant: The cured adhesive is specifically engineered to meet the stringent fire retardancy requirements of UL94 V-0.
- Electrically insulating: Delivers high dielectric strength (40-45 kV/mm), making it safe and effective for electronic assemblies.
Applications / Suitable for
- Bonding applications requiring heat dissipation, such as heat sinks to ceramic headers
- Structural bonding of metals, ceramics, and composite materials
- Electronic enclosures requiring UL94 V-0 fire retardancy compliance
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Electrical Properties
Other Properties
Additional Information
As-supplied / before-processing properties
Typical properties; these values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Chemical Composition | Epoxy Resin | - | - |
| Appearance | Black | - | Paste |
| Viscosity | 600,000 to 800,000 | cP | at 25°C (mPa.s) |
| Specific Gravity | 1.6 | - | - |
| Maximum Gap Fill | 5 | mm | (0.2 in) |
| Flash Point | > 100 | °C | - |
After-processing / final-state properties
Typical properties; these values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Flow at High Temperature | Flowing | - | - |
| Cure Speed | < 3 | minutes | Induction |
| Cure Speed | 75 | minutes | Oven at 130°C (266°F) |
| Cure Speed | 60 | minutes | Oven at 150°C (300°F) |
| Cure Speed | 25 | minutes | Oven at 170°C (338°F) |
| Shear Strength | 27-41 | N/mm² | Steel (ISO 4587) (4000-6000 psi) |
| Shear Strength | 7-31 | N/mm² | Aluminium (2500-4500 psi) |
| Shear Strength | 4-27 | N/mm² | Zinc (2000-4000 psi) |
| Hardness | 80-85 | Shore D | ISO 868 |
| Dielectric Strength | 40-45 | kV/mm | - |
| Coefficient of Thermal Expansion | 45E-6 | mm/mm/°C | (below Tg) |
| Thermal Conductivity | 1.0 | W/(m.K) | - |
| Glass Transition Temperature (Tg) | 105 | °C | (220°F) DSC |
