Scotch-Weld Epoxy Adhesive 2216 B/A Technical Data October 2018 Product Description 3M Scotch-Weld Epoxy Adhesive 2216 B/A is a flexible, two-part, room temperature curing epoxy with high peel and shear strength, available in three versions. 2216 B/A Gray meets DOD-A-82720. Note: The following technical information and data should be considered Typical Uncured representative or typical only and should not be used for specification Physical purposes. Properties Product 3M Scotch-Weld Epoxy Adhesive 2216 B/A Gray 2216 B/A Tan NS 2216 B/A Translucent Base Accelerator Base Accelerator Base Accelerator Color: White Gray White Tan Translucent Amber Base: Modified Modified Modified Modified Modified Modified Epoxy Amine Epoxy Amine Epoxy Amine Net Wt.: (lb/gal) 11.1-11.6 10.5-11.0 11.1-11.6 10.5-11.0 9.4-9.8 8.0-8.5 Viscosity: (cps) (Approx.) Brookfield RVF 75,000 - 40,000 - 75,000 - 550,000 - 11,000 - 5,000 - 7 sp. 20 rpm 150,000 80,000 150,000 900,000 15,000 9,000 Mix Ratio: (by weight) 5 parts 7 parts 5 parts 7 parts 1 part 1 part Mix Ratio: (by volume) 2 parts 3 parts 2 parts 3 parts 1 part 1 part Work Life: 100 g Mass 75F (24C) 90 minutes 90 minutes 120 minutes 120 minutes 120 minutes 120 minutes Features Excellent for bonding many metals, woods, plastics, rubbers, and masonry products. Base and Accelerator are contrasting colors. Good retention of strength after environmental aging. Resistant to extreme shock, vibration, and flexing. Excellent for cryogenic bonding applications. Excellent for potting parts subject to thermal cycling. The tan NS Adhesive is non-sag for greater bond-line control. The translucent can be injected. Meets DOD-A-82720. 3M Scotch-Weld Epoxy Adhesive 2216 B/A Typical Cured Product 3M Scotch-Weld Epoxy Adhesive Physical Properties 2216 Gray 2216 Tan NS 2216 Translucent Color Gray Tan Translucent Shore D Hardness 50-65 65-70 35-50 ASTM D 2240 Time to Handling Strength 8-12 hrs. 8-12 hrs. 12-16 hrs. Typical Cured Product 3M Scotch-Weld Epoxy Adhesive Electrical Properties 2216 Gray 2216 Translucent Arc Resistance 130 seconds Dielectric Strength 408 volts/mil 630 volts/mil Dielectric Constant 73F (23C) 5.51Measured 1.00 KHz 6.3 1 KHz Dielectric Constant 140F (60C) 14.17Measured 1.00 KHz Dissipation Factor 73F (23C) 0.112 Measured 1.00 KHz 0.119 1 KHz Dissipation Factor 140F (60C) 0.422Measured 1.00 KHz 16 Surface Resistivity 73F (23C) 5.5 x 10 ohm 500 volts DC 12 12 Volume Resistivity 73F (23C) 1.9 x 10 ohm-cm 500 volts DC 3.0 x 10 ohm-cm 500 volts DC Typical Cured Product 3M Scotch-Weld Epoxy Adhesive Thermal Properties 2216 Gray 2216 Translucent 2 2 Thermal Conductivity 0.228 Btu-ft/ ft h F 0.114 Btu-ft/ ft h F -6 -6 Coefficient of Thermal 102 x 10 in/in/C 81 x 10 in/in/C Expansion between 0-40C between -50-0C -6 -6 134 x 10 in/in/C 207 x 10 in/in/C between 40-80C between 60-150C Typical Cured Outgassing Data Outgassing Properties NASA 1124 Revision 4 % TML % CVCM % Wtr 3 M Scotch-W eld Epoxy Adhesive 2216 Gray .77 .04 .23 Cured in air for 7 days 77F (25C). Handling/Curing Directions for Use Information 1. For high strength structural bonds, paint, oxide films, oils, dust, mold release agents and all other surface contaminants must be completely removed. However, the amount of surface preparation directly depends on the required bond strength and the environmental aging resistance desired by user. For suggested surface preparations of common substrates, see the following section on surface preparation. 2. These products consist of two parts. Mix thoroughly by weight or volume in the proportions specified on the product label and in the uncured properties section. Mix approximately 15 seconds after a uniform color is obtained. - 2 -