TM Scotch-Weld Epoxy Adhesive DP420 Black DP420 NS Black DP420 Off-White DP420 LH Technical Data April, 2019 Product Description 3M Scotch-Weld Epoxy Adhesives are high performance, two-part epoxy adhesives offering outstanding shear and peel adhesion, and very high levels of durability. Controlled flow (3M Scotch-Weld Epoxy Features High shear strength Adhesive DP420 NS Black) High peel strength Recognized as meeting UL 94 HB Underwriters Laboratory Horizontal Burn Flammability Test Outstanding environmental (3M Scotch-Weld Epoxy Adhesive DP420 performance Off-White) Easy mixing Low halogen content (3M Scotch-Weld Epoxy Adhesive DP420 LH) 20 minute worklife Note: The following technical information and data should be considered representative Typical Uncured or typical only and should not be used for specification purposes. Physical Properties 3M Scotch-Weld Epoxy Adhesive Product DP420 Black DP420 NS Black DP420 Off-White DP420 LH Viscosity (approx.) Base 20,000-50,000 cP 190,000-270,000 cP 20,000-50,000 cP 20,000-50,000 cP 73F (23C) Accelerator 8,000-14,000 cP 60,000-130,000 cP 8,000-14,000 cP 8,000-14,000 cP Base Resin Base epoxy epoxy epoxy epoxy Accelerator amine amine amine amine Color Base black black white white Accelerator amber amber amber amber Net Weight Base 9.3-9.7 9.4-9.8 9.3-9.7 9.3-9.7 Lbs./Gallon Accelerator 9.0-9.4 9.1-9.5 9.0-9.4 9.0-9.4 Mix Ratio (B:A) Volume 2:1 2:1 2:1 2:1 Weight 2:0.97 2:0.97 2:0.97 2:0.97 Worklife, 73F (23C) 20 g mixed 15 minutes 15 minutes 15 minutes 15 minutes 10 g mixed 20 minutes 20 minutes 20 minutes 20 minutes 5 g mixed 30 minutes 30 minutes 30 minutes 30 minutes - 1 - 3M Scotch-Weld Epoxy Adhesive DP420 Black DP420 NS Black DP420 Off-White DP420 LH Typical Cured Note: The following technical information and data should be considered representative or typical only and should not be used for specification purposes. Properties The properties of cured 3M Scotch-Weld Epoxy Adhesive DP420 NS Black and 3M Scotch-Weld Epoxy Adhesive DP420 LH are expected to be similar to the properties of 3M Scotch-Weld Epoxy Adhesive DP420 Black and 3M Scotch-Weld Epoxy Adhesive DP420 Off-White, respectively as described by data in the following sections of this technical data sheet. An exception to this is the concentration of halogens in 3M Scotch-Weld Epoxy Adhesive DP420 LH. 3M Scotch-Weld Epoxy Adhesive DP420 LH is a form of 3M Scotch-Weld Epoxy Adhesive DP420 Off-White that can be considered low halogen. Low halogen is defined by the Electrotechnical Commission (IEC) 61249-2-21 standard as having less than 900 ppm chlorine, 900 ppm bromine, and less than 1500 ppm total chlorine and bromine. 3M Scotch-Weld Epoxy Adhesive DP420 LH Test Results Halogens (determined by ion chromatography) Total Chlorine (ppm) Total Bromine (ppm) Total Halogens (ppm) 720 <5 <800 3M Scotch-Weld 3M Scotch-Weld Epoxy Adhesive Epoxy Adhesive Product DP420 Black DP420 Off-White Physical Color Black Opaque, off-white Shore D Hardness 75-80 75-80 Thermal Coefficient of Thermal -6 -6 Expansion Below Tg 80 x 10 85 x 10 -6 -6 (in./in./C) Above Tg 194 x 10 147 x 10 Thermal Conductivity 0.104 0.104 2 (btu - ft./ft. - hr. - F) 45C Electrical Dielectric Strength (ASTM D 149) 888 volts/mil 690 volts/mil 15 14 Volume Resistivity (ASTM D 257) 1.6 x 10 ohm-cm 1.3 x 10 ohm-cm - 2 -