EPO-TEK® MED-T905BN-3
Technical Data Sheet
For Reference Only
Biocompatible/Thermally Conductive Epoxy

ISO 10993-5 Tested/Compliant
Date:
Rev:
No. of Components:
Mix Ratio by Weight:
Specific Gravity:
Pot Life:
Shelf Life- Bulk:

Recommended Cure: 80°C / 2 Hours

February 2021
IV
Two
100 : 14
Part A: 1.64
Part B: 0.91
< 3 Hours
One year at room temperature

Alternative biocompatible cure schedules may be possible,
but have not been certified. Contact med@epotek.com
with any questions.

NOTES:● Container(s) should be kept closed when not in use.
● Filled systems should be stirred thoroughly before mixing and prior to use.
● Performance properties (rheology, conductivity, others) of the product may vary from those stated on the data sheet when bi-pak/syringe packaging or
post-processing of any kind is performed. Epoxy’s warranties shall not apply to any products that have been reprocessed or repackaged from Epoxy’s
delivered status/container into any other containers of any kind, including but not limited to syringes, bi-paks, cartridges, pouches, tubes, capsules, films
or other packages.
● Syringe packaging will impact initial viscosity and effective pot life, potentially beyond stated parameters.

Product Description: EPO-TEK® MED-T905BN-3 is a biocompatible, thermally conductive, and electrically insulating epoxy for potting
and heat sinking. It is often used in cooling of ultrasound and x-ray circuits and was formulated with a low exothermic chemistry; ideal
for large volume casting or potting.
Typical Properties: Cure condition: 80°C / 2 Hours
Different batches, conditions & applications yield differing results.
Data below is not guaranteed. To be used as a guide only, not as a specification. * denotes test on lot acceptance basis
PHYSICAL PROPERTIES:* Color (before cure):
Part A: Grey
Part B: Clear* Consistency:
Granular paste* Viscosity (23°C) @ 50 rpm:
2,000-7,000 cPs
Thixotropic Index:* Glass Transition Temp:≥ 40 °C (Dynamic Cure: 20-200°C/ISO 25 Min; Ramp -10-200°C @20°C/Min)
Coefficient of Thermal Expansion (CTE):
Below Tg:
37 x 10-6 in/in°C
Above Tg:
177 x 10-6 in/in°C
Shore D Hardness:
76
Lap Shear @ 23°C:
1,736 psi
Die Shear @ 23°C:≥ 10 Kg
3,556 psi
Degradation Temp:
363 °C
Weight Loss:@ 200°C:
0.13 %@ 250°C:
0.27 %@ 300°C:
0.73 %
Suggested Operating Temperature:< 300 °C (Intermittent)
Storage Modulus:
673,161 psi* Particle Size:
300 microns
ELECTRICAL AND THERMAL PROPERTIES:
Thermal Conductivity:

2.3

W/mK

Epoxies and Adhesives for Demanding Applications™
This information is based on data and tests believed to be accurate. Epoxy Technology, Inc. makes no warranties (expressed or implied) as toits accuracy and assumes no liability in connection with any use of this product.
EPOXY TECHNOLOGY, INC.
14 FORTUNE DRIVE, BILLERICA, MA 01821 (978) 667-3805, FAX (978) 663-9782
www.epotek.com
A Meridian Adhesives Group Company

Selected Applications for EPO-TEK® MED-T905BN-3
Fiber and Electro-Optics• Heat sinking fiber and laser optics – adhesion to SST, Cu, Al and brass• General, all-purpose fiber optic repair adhesive

Imaging Technologies• Adhesive between Si substrate bench and PCB, for photo-diode arrays in xray
detection circuits

Ultrasound/Ultrasonic• General all-purpose ultrasound potting and probe repair adhesiveepotek.com

Life Sciences and MicroFluidics• General adhesive for bio and molecular diagnostic markets

Implantable Devices• Heat sinking and potting Cu coils and electric motors

Surgical Tools• Potting PCBs into metals shafts of hand held surgical instruments• Laser optics, surgical tools, thermal interface material (TIM)

Biocompatibility Approvals• EPO-TEK® MED-T905BN-3 cured at 80°C for 2 hours has been tested and is ISO 10993-5 certified (Cytotoxicity testing by MEM Elution methodology).

Sterilization Information• Epoxy performance is most influenced by surface preparation and cleanliness, overall process and handling, and finally proper curing selection. Whilebulk samples of MED-T905BN-3 may resist sterilization technologies such as autoclave steam, gaseous technologies, gamma radiation as well as liquid
disinfectants, the glue joints may differ. All users need to determine the suitability of MED-T905BN-3 for their given application.
• MED-T905BN-3 is generally regarded for resisting few cycles of ETO, gamma radiation and autoclave sterilization cycles.
• Gamma Radiation/ion beam may discolor MED-T905BN-3, thus altering its appearance.
See Technical Tip # 29: Gamma Sterilization for Medical Devices and its Effect on Epoxies for more information.
http://www.epotek.com/site/files/Techtips/pdfs/techtips_29.pdf

Packaging Availability• EPO-TEK MED-T905BN-3 is is available in specialty packaging such as Pre-Mixed Frozen Syringe (PMF) or bulk (A & B containers).
• A video tutorial on handling frozen syringes can be found here:
http://www.epotek.com/site/technical-material/application-video-tutorials/231-proper-receiving-and-thawing.html

Med i ca l Grade
Epoxy Technology Inc.

E P O - T E K®
EPO-MT905BN3-02

14 Fortune Drive • Billerica, MA 01821
phone 978-667-3805 fax 978-663-9782
med@epotek.com© Epoxy Technology Inc. 2018