DOWSIL SE 4420
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
- Fast 8-Minute Tack-Free Cure
- Manual or Automated Dispensing
- One-Part Thermal Module Bonding
Product Description
DOWSIL SE 4420 Thermally Conductive Adhesive combines one-part moisture cure with a semi-flowable white consistency for attaching cooling modules in telecom and power-supply devices. It is suitable for manual or automated dispensing, contains 98% nonvolatile content, and develops a tack-free surface in about 8 minutes at 25 deg C. After cure, the material has 0.92 W/(m K) thermal conductivity, 2.7 MPa unprimed lap shear strength on aluminum, and Shore A 76 hardness. Moisture cure advances from exposed surfaces, so highly confined or deep sections are not typical uses.
Key features
- Fast tack-free surface: Develops a tack-free surface in about 8 minutes at 25 deg C.
- Thermal attachment data: Cured bulk thermal conductivity is 0.92 W/(m K), with 2.7 MPa unprimed lap shear on aluminum.
- Dispensing flexibility: Semi-flowable one-part material can be applied by manual or automated dispensing.
Applications / Suitable for
- Cooling modules for telecom devices
- Cooling modules for power-supply devices
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Mechanical Properties
Thermal Properties
Additional Information
As-supplied / before-processing properties
Typical values for the one-part adhesive before cure.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Number of parts | One | Product configuration | |
| Color | White | As supplied | |
| Fluidity | 48 | mm | Typical |
| Nonvolatile content | 98 | % | Typical |
| Tack-free time | 8 | min | At 25 deg C |
After-processing / final-state properties
Typical properties of the cured adhesive.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Specific gravity | 2.26 | Cured | |
| Tensile strength | 4.1 | MPa | Cured |
| Elongation | 77 | % | Cured |
| Durometer hardness | 76 | Shore A | JIS |
| Unprimed lap shear | 2.7 | MPa | Aluminum |
| Thermal conductivity | 0.92 | W/(m K) | Cured bulk material |
