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Responding to the rapid growth and increasing importance in the global battery and electric vehicle (EV) sectors, Shin-Etsu Silicones of America (SESA: A U.S. subsidiary of Shin-Etsu Chemical Co. Ltd., Japan) recently showcased their SDP-6560 A/B liquid-dispensed gap filling, non-adhesive curing silicone thermal interface material (TIM). Part of the high performing SDP Series, which are two-part, room-temperature cure silicone-based materials, the product acts as a thermal interface gap filler−providing exceptional thermal conductivity and excellent insulation for electronics applications requiring thermal dissipation.
Key gap filler properties:
SDP-6560 A/B cures at room temperature when the two components are mixed. After curing, the material has low hardness, translating to less stress on components. Because of the addition reaction, curing time is shortened by heating. Moreover, it can be reworked because it does not adhere to substrates. Notably, its grease-like consistency allows the material to flow into the nooks and crannies lowering the contact resistance over a variety of metal substrates.
Key automotive/EV applications:
Developed to provide progressive options to thermal engineers in the growing EV market sector for silicone, SDP-6560 A/B is suited to transfer the temperature out of the electronic part to the housing. While the gap fillers can be used on a myriad of electronic parts on an EV, they are primarily used around battery cells. Key applications include usage in the battery management systems to the electronic control unit (ECUs) in the cars, or even the entertainment system.
SDP-6560 A/B series liquid dispense gap fillers provide high thermal conductivity over a large range of gap thicknesses requiring thermal dissipation. Easily dispensable, in even complicated patterns, this range of gap fillers cures to a soft elastomer−providing flexibility and electrical isolation between components.
The company also showcased another EV-ready V-O HCR (high consistency rubber) material suitable for the growing EV sector: SESA’s SV-9X001-U Series. The material has excellent electrical and flame-retardant properties and features the following range of specs:
- Hardness: Type A=40-80
- Tensile strength: ASTM (MPa)=3.9-6.3
- Tear strength: DIE-B (kN/M)=20-27
“When properly catalyzed, the SV-9X001-U Series can be used in a variety of applications requiring finishing by molding, extrusion, or calendaring,” says Shin-Etsu’s North American Marketing Manager Eric Bishop. “This unique material finds extensive use in molding processes to create components with exceptional heat resistance, chemical resistance, and flexibility.”