3M TC-2707
Harmonization Code : 3214.10.00 | Putty and other mastics | Resin cements, caulking compounds and other mastics
Main features
- Thermally Conductive Bonding
- 60-Minute Working Window
- Low-Viscosity Gap Filling
Product Description
3M Thermally Conductive Epoxy Adhesive TC-2707 is a two-part aluminum-filled epoxy adhesive that creates thermally conductive bonds in electronic and thermal-management assemblies. The 2:1 by-volume mix has a typical 60-minute work life at 23 deg C and a mixed viscosity of 60,000 cP for gap filling, potting, and thin bondlines. Typical cured thermal conductivity is 0.72 W/(m K), with ambient and heat-cure schedules available. The aluminum filler can create an electrical bridge if it is trapped between energized surfaces, so TC-2707 is not intended where reliable electrical insulation or powered-circuit isolation is required.
Key features
- Thermally conductive bonding: A typical 0.72 W/(m K) cured value combines heat transfer with adhesive attachment.
- Controlled working window: A typical 60-minute work life at 23 deg C supports mixing, placement, and assembly.
- Gap-fill and potting flow: Mixed viscosity supports potting, general gap filling, and thin bondline application.
Applications
Applications include LED assembly, thermal fixing of battery cells, EV and HEV battery thermal management, potting, and general gap filling.
TDS, SDS & Technical Documents
Technical Specifications
Physical Properties
General Properties
Additional Information
As-supplied / before-processing properties
Values are typical for the accelerator or mixed system as identified.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Accelerator viscosity | 25,000 | cP | 40 mm, 2 deg cone at 10 s^-1 |
| Mixed viscosity | 60,000 | cP | 40 mm, 2 deg cone at 10 s^-1 |
| Aluminum filler content | 50 | wt% | As supplied |
| Mix ratio, B:A | 2:1 | by volume | Two-part system |
| Work life | 60 | minutes | 23 deg C |
After-processing / final-state properties
Cured values are typical; TC-2707 is not intended where reliable electrical insulation is required.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Shore D hardness | 80 | ASTM D2240 | |
| Thermal conductivity | 0.72 | W/(m K) | ASTM D5470; cured material |
| Volume resistivity | 1.6 x 10^11 | ohm cm | ASTM D257; aluminum filler can lower effective values when pinched |
| Overlap shear strength | >18.62 | N/mm^2 | ASTM D1002; 23 deg C/24 h, 90 deg C/30 min, or 120 deg C/10 min cure |
| T-peel strength | >7 | lb/in width | ASTM D1876; same three cure schedules |
