3M™ Thermally Conductive Epoxy Adhesive TC-2707
Product Description
3M™ Thermally Conductive Epoxy Adhesive TC-2707 is a thermally conductive 2-part epoxy using aluminum metal
filler for good thermal conductivity with high adhesion.
Key Features
• High adhesive strength
• Slight tack allows pre-assembly
• Good surface wet out
• Low viscosity for potting applications
• Good gap filling
• Thin bonding line
• Good thermal conductivity (0.72 W/m-K)
• Low Cl ion content and outgassing
• Thermally and electrically conductive
Typical Uncured Properties
Note: The following technical information and data should be considered representative or typical only and should not be used for
specification purposes.
*Viscosity it measured 40mm, 2°cone at 10 1/sec.
Applications
• LED Assembly
• Thermal fixing battery cell and thermal management for EV/HEV battery
• Potting applications
• General gap filling
Application Techniques and Product Use
For bonding rigid to rigid parts, it is suggested that the bond line thickness and edge fill be designed to optimize:
3M™ Thermally Conductive Epoxy Adhesive TC-2707
Property
Value
*Viscosity Base
Accelerator
Mixed
95,00 cps
25,000 cps
60,000 cps
Base Resin Base
Accelerator
Epoxy
Amine
Filler Aluminum
50% by weight
Mix Ratio Volume
(B:A) Weight
2:1
2.00:0.96
Worklife
60 minutes at 23°C (72°F)
Technical Data | September 2018
3M™ Thermally Conductive Epoxy TC-2707
1. Bond Strength
2. Thermal Resistance
A typical suggested bond line is in the 3-7 mil (0.076- 0.018mm) thickness range,
For improved thermal performance (lower Thermal Resistance), a thinner bond line is suggested. A thinner bond line
can reduce the bond strength, so each application needs to be tested to find correct balance
Bond Line Thickness vs Thermal Resistance vs Bond Strength
A “fillet” at the edge of a bond line is suggested to increase bond strength. The fillets are formed as the epoxy squeezes
out past the side edges. Fillets can add strength to the assembly.
3™ Thermal Conductive Epoxy TC-2707 is supplied in dual syringe plastic duo-pak cartridges as part of the 3™ EPX™
Plus II Applicator System. The duo-pak cartridges are supplied in a 37 or 50 ml configuration. To use the cartridge
simply insert the duo-pak cartridge into the EPX applicator and start the plunger into the cylinders using light pressure
on the trigger. Next, remove the duo-pak cartridge cap and expel and discard a small amount of adhesive to be sure
both sides of the duo-pak cartridge are flowing evenly and freely (i.e.: no voids, “plugs of adhesive”, dis-continuity in
flow, etc.) Once even side to side and uniform flow from both sides of the duo-pak is confirmed, attach the 3M EPX
mixing nozzle to the duo-pak cartridge to ensure proper and uniform mixing of the Part A and Part B and begin
dispensing the adhesive.
Partially used cartridges must follow the above use instructions to ensure consistent product performance.
Complete and uniform mixing as noted above of the two components is required to obtain consistent product
performance.
3M™ EPX™ Plus II Applicator Mix Nozzles
Use only 3M™ EPX™ Plus II Applicator and Mix Nozzles to ensure optimum product performance.
Typical Cured Physical Properties and Performance Characteristics
Note: The following technical information and data should be considered representative or typical only and should not be used for
specification purposes. Final product specifications and testing methods will be outlined in the products Certificate of Analysis
(COA) that is shipped with the commercialized product once it is approved by 3M for general commercialization and development
work is completed.
3M™ Thermally Conductive Epoxy Adhesive TC-2707
Method*
Value
Gray
ASTM D2240
80
ASTM 1356
See Chart on page 3
ASTM E831
75 X 10 -6C (below Tag)
160 X10 -6/C (above Tg)
ASTM D5470
0.72 W/m-K
ASTM D5470
3.51X 10-5 m°K/W (1 mil)
3M™ Thermally Conductive Epoxy TC-2707
ASTM D257
1.6 x 1011ohm-cm
ASTM 5116
<1000 ug/g (GC/MS, 85 C/3
hours)
ASTM 5516
<5 ug/g (GC/MS, 85C/3 hours
ASTM D7994
<30 ug/g (hexane extraction)
*Methods listed as ASTM are tested in accordance with the ASTM method noted
*Disclaimer if applicable to chart above
1) As the 3M™ Thermally Conductive Epoxy Adhesive TC-2707 uses aluminum metal fillers, under certain end use application conditions the effective
resistivity and/or effective dielectric strength could be significantly lower than noted. If the metal filler is “trapped” or “pinched” between two
surfaces, an electrical bridge path via the aluminum fillers could occur between these surfaces. Epoxy Adhesive TC-2707 is not suggested for
application where a powered electrical circuit is used or where a reliable volume resistivity and/or dielectric strength is desired. 3M™ Thermally
Conductive Epoxy Adhesive TC-2810 uses ceramic filler and is a suggested product to test for these types of application performances needs.
Curing
Cure Schedule: 23°C/24 hours
50°C/270 minutes
70°C/90 minutes
90°C/30 minutes
120°C/10 minutes
Typical Shear Strength, Peel Strength, Tg vs Cure Temperature/Time
Note: The following technical information and data should be considered representative or typical only and should not be used for
specification purposes. Final product specifications and testing methods will be outlined in the products Certificate of Analysis
(COA) that is shipped with the commercialized product once it is approved by 3M for general commercialization and development
work is completed.
3M™ Thermally Conductive Epoxy Adhesive TC-2707
23 °C
(72 °F)
24 hours
90 °C
(194 °F)
30 minutes
120 °C
(248 °F)
10 minutes
>18.62 (2700)
>18.62 (2700)
>18.62 (2700)
>7
>7
>7
60
66
66
*Methods listed as ASTM are tested in accordance with the ASTM method noted
*Disclaimer if applicable to chart above
Storage and Shelf Life
The shelf life of 3M™ Thermally Conductive Epoxy Adhesive TC-2707 is 12 months from the date of manufacture when
stored in original cartons at 21C (70F) and 50% relative humidity
Certificate of Analysis (COA)
The COA contains the 3M specifications and test methods for the products performance limits that the product will be
supplied against. The 3M product is supplied to 3M COA test specifications and the COA test methods. Contact your
local 3M representative for this product’s COA.
3M™ Thermally Conductive Epoxy TC-2707
Safety Data Sheet: Consult Safety Data Sheet before use.
Technical Information: The technical information, recommendations and other statements contained in this document are based
upon tests or experience that 3M believes are reliable, but the accuracy or completeness of such information is not guaranteed.
Product Use: Many factors beyond 3M’s control and uniquely within user’s knowledge and control can affect the use and
performance of a 3M product in a particular application. Given the variety of factors that can affect the use and performance of a
3M product, user is solely responsible for evaluating the 3M product and determining whether it is fit for a particular purpose and
suitable for user’s method of application.
Warranty, Limited Remedy, and Disclaimer:
Unless an additional warranty is specifically stated on the applicable 3M product packaging or product literature, 3M warrants
that each 3M product meets the applicable 3M product specification at the time 3M ships the product. 3M MAKES NO OTHER
WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OR
CONDITION OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY OR CONDITION
ARISING OUT OF A COURSE OF DEALING, CUSTOM OR USAGE OF TRADE. If the 3M product does not conform to this
warranty, then the sole and exclusive remedy is, at 3M’s option, replacement of the 3M product or refund of the purchase price.
Safety
Limitation of Liability: Except where prohibited by law, 3M will not be liable for any loss or damage arising from the 3M product,
whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted, including warranty, contract,
negligence or strict liability.
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