DOWSIL TC-4026
Harmonization Code : 3824.99.92.97 | Prepared binders for foundry molds or cores; chemical products and preparations of the chemical or allied industries (including those consisting of mixtures of natural products), not elsewhere specified or included: other : other : other
Main features
- Printable Formed-In-Place Thermal Pads
- Glass-Bead Thickness Control
- Soft Reworkable Thermal Interface
Product Description
DOWSIL TC-4026 Dispensable Thermal Pad is a two-part, 1:1 mix silicone thermal interface material that can be screen printed, stencil printed, or automatically dispensed into controlled shapes. Glass beads help maintain the applied thickness through cure, supporting repeatable gap filling in compact PCB system assemblies. The mixed blue material has a typical viscosity of 70,000 mPa s and a four-hour pot life at 25 deg C. After cure, the soft Shore 00 50 elastomer provides 2.5 W/(m K) bulk thermal conductivity, 200% elongation, and dielectric insulation. Applications include cooling assemblies in LED lighting, automotive electronics, and consumer devices where a formed-in-place thermal pad is preferred.
Key features
- Printable or dispensable format: Supports screen printing, stencil printing, and automated dispensing into application-specific shapes.
- Controlled cured thickness: Glass beads help maintain the applied pad thickness through cure.
- Soft thermal interface: The cured Shore 00 50 elastomer has 2.5 W/(m K) bulk thermal conductivity.
Applications / Suitable for
- LED lamp and luminaire cooling assemblies
- Automotive electronic assemblies
- Consumer-device PCB cooling
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Additional Information
As-supplied / before-processing properties
Typical handling and cure data for the two-part material before and during processing.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Number of parts | 2 | Part A and Part B | |
| Mix ratio | 1:1 | Part A to Part B | |
| Component colors | White/off-white; blue | Part A; Part B | |
| Mixed color | Blue | After mixing | |
| Mixed viscosity | 70,000 | mPa s | Typical |
| Pot life | 4 | h | At 25 deg C |
| Room-temperature cure | 24 | h | At 25 deg C |
| Heat-cure schedule | 15 | min | At 100 deg C |
After-processing / final-state properties
Typical properties of the cured thermal pad material.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Specific gravity | 2.8 | Cured material | |
| Durometer hardness | 50 | Shore 00 | Cured material |
| Thermal conductivity | 2.5 | W/(m K) | Cured bulk material |
| Tensile strength | 24 | psi | Cured material |
| Elongation | 200 | % | Cured material |
| Dielectric strength | 18 | kV/mm | Cured material |
| Volume resistivity | 3.9 x 10^12 | ohm cm | Cured material |
