3 TM Scotch-Weld Epoxy Adhesives DP125 Translucent and Gray Technical Data December, 2009 3M Scotch-Weld Epoxy Adhesive DP125 Translucent is a faster curing version Product Description of the 3M Scotch-Weld Epoxy Adhesive 2216 Translucent B/A. The worklife and cure time has been reduced from hours and days for the Scotch-Weld epoxy adhesive 2216 Translucent B/A to minutes and hours. Final shear and peel strengths remain similar or even slightly improved compared to the Scotch-Weld epoxy adhesive 2216 Translucent. Scotch-Weld epoxy adhesive DP125 Gray is a filled, pigmented version of the Scotch-Weld epoxy adhesive DP125 Translucent and has similar performance and flexibility properties. Available in bulk containers as 3M Scotch-Weld Epoxy Adhesive 125 B/A Translucent and 125 B/A Gray. Features 25 minute worklife High peel and shear strength Flexible Controlled flow (gray) Translucent or Gray 1:1 mix ratio Note: The following technical information and data should be considered representative Typical Uncured or typical only and should not be used for specification purposes. Properties Scotch-Weld Scotch-Weld Epoxy Adhesive Epoxy Adhesive DP125 Translucent DP125 Gray Base Resins Epoxy/Amine Epoxy/Amine 1 Viscosity , Approximate Base (B) 2,000-8,000 cps 35,000-75,000 cps 80F Accelerator (A) 22,000-33,000 cps 45,000-65,000 cps Net Weight Base (B) 9.3-9.7 10.3-10.7 (Lbs./gal.) Accelerator (A) 8.4-8.6 8.5-8.9 Color Base (B) Clear Gray Accelerator (A) Amber Amber Mix Ratio (B:A) By Volume 1:1 1:1 By Weight 1.10:1 1.2:1 2 Worklife 2 gram 25 min. 25 min. 73F 20 gram 18 min. 15 min. Footnotes: 1. Viscosity determined using 3M test method C-1d. Procedure involves Brookfield RVF, 7 spindle, 20 rpm and 80F. Measurement taken after 1 minute. 2. Worklife determined using 3M test method C-3180. Procedure involves periodically measuring a 2 gram mixed mass for self leveling and wetting properties. This time will also approximate the usable worklife in an 3M EPX Applicator mixing nozzle. 3M Scotch-Weld Epoxy Adhesives DP125 Translucent and Gray 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 Physical Footnotes: 3M Scotch-Weld 3M Scotch-Weld 2. Worklife determined using 3M test Epoxy Adhesive Epoxy Adhesive method C-3180. Procedure involves DP125 Translucent DP125 Gray periodically measuring a 2 gram mixed mass for self leveling and Color Translucent Gray wetting properties. This time will Hardness (ASTM D 2240) also approximate the usable worklife in an 3M EPX Shore D 55 70 Applicator mixing nozzle. 2 Worklife 20-30 minutes 20-30 minutes 3. Tack-free time determined per 3M 3 test method C-3173. Involves Tack-free Time 2 hrs 2 hrs dispensing 0.5 gram amount of 4 Time to Handling Strength 2.5 hrs 2.5 hrs adhesive onto substrate and testing periodically for no adhesive 5 Full Cure Time 7 days 7 days transfer to metal spatula. 6 4. Handling strength determined per Elongation 150% 120% 3M test method C-3179. Time to 6 Tensile Strength 2500 psi 3300 psi handling strength taken to be that required to achieve a 50 psi OLS strength using aluminum Thermal substrates. 5. The cure time is defined as that Scotch-Weld Scotch-Weld time required for the adhesive to Epoxy Adhesive Epoxy Adhesive achieve a minimum of 80% of the DP125 Translucent DP125 Gray ultimate strength as measured by aluminum-aluminum OLS. Weight Loss by Thermal Gravimetric 1% 164C 1% 176C 6. Tensile and Elongation. Used 7 Analysis (TGA) 5% 301C 5% 303C procedure in 3M test method C-3094/ATSM D 882. Samples Thermal Coefficient of Expansion (TCE) were 2 in. dumbbells with .0125 in. 8 -6 by TMA ( x 10 units/unit/C) neck and .030 in. sample Below Tg 112 (5-20C range) 98 (5-20C range) thickness. Separation rate was 2 Above Tg 190 (65-140C range) 187 (65-140C range) inches per minute. Samples cured 2 hrs RT plus 2 hrs/160F. Glass Transition Temperature 7. Weight loss by TGA reported as 9 (Tg) by DCS that temperature at which 5% Onset 3C 12C weight loss occurs by TGA in air at 5C rise per minute per ASTM Mid-Point 15C 23C 1131-86. 10 Thermal Conductivity 8. TCE determined using TMA ( 110F on .250 in. samples) Analyzer using a heating rate of 2 BTU - ft./ft. - hr. - F) .089 .087 10C per minute. Second heat -3 -3 values given. Cal./sec. - cm - C) .37 x 10 .36 x 10 9. Glass Transition Temperature (Tg) Watt/m - C .154 .151 determined using DSC Analyzer 11 Thermal Shock Resistance with a heating rate of 20C per minute. Second heat values given. Potted Washer Olyphant Test Pass 5 cycles Pass 5 cycles (3M Test Method C-3174) without cracking without cracking 10. Thermal conductivity determined using ASTM C177 and C-matic +100C air to -50C liquid ) Instrument using 2 in. diameter samples. Electrical 11. Thermal shock resistance run per 3M test method C-3174. Involves potting a metal washer into a 2 in. Scotch-Weld Scotch-Weld x 0.5 in. thick section and cycling Epoxy Adhesive Epoxy Adhesive this test specimen to colder and DP125 Translucent DP125 Gray colder temperatures. Dielectric Constant 1 KH 23C 6.3 6.3 Z (ASTM D 150) Dissipation Factor 1 KH 23C 0.14 0.13 Z (ASTM D 150) Dielectric Strength 765 volts/mil 680 volts/mil (ASTM D 149) Sample Thickness Approx. 30 mil 11 11 Volume Resistivity 1.2 x 10 ohm-cm 1.0 x 10 ohm-cm (ASTM D 257) - 2 -