3 TM Scotch-Weld Acrylic Adhesives DP805 DP820 Technical Data December, 2009 TM TM 3M Scotch-Weld Acrylic Adhesives DP805 and DP820 are two-part, 1:1 mix Product Description ratio, toughened acrylic structural adhesives. They exhibit excellent shear and peel strengths along with good impact and durability and bond well to many metals, ceramics, wood and most plastics. Features Excellent shear and peel strengths Easy mixing 5 minute worklife (Scotch-Weld acrylic adhesive DP805) Non-sag 20 minute worklife (Scotch-Weld acrylic adhesive DP820) Minimal surface preparation 1:1 mix ratio Typical Uncured Note: The following technical information and data should be considered representative or typical only and should not be used for specification purposes. Physical Properties Product Scotch-Weld Scotch-Weld Acrylic Adhesive Acrylic Adhesive DP805 DP820 Color Base (B) Off-White Off-White Accelerator (A) Yellow Yellow Net Weight Base (B) 8.4 8.6 (Lbs./Gallon) Accelerator (A) 8.1 8.1 1 Viscosity Base (B) 75,000 cps 70,000 cps 73F (23C) Accelerator (A) 150,000 cps 45,000 cps Base Resin Acrylic Acrylic Mix Ratio (B:A) By Volume 1:1 1:1 By Weight 1:1 1:1 2 Worklife Nozzle mixed 3-4 minutes 15-20 minutes 73F (23C) 3 Applied Open Time 3 minutes 15 minutes 4 Time to Handling Strength 7-10 minutes 30-40 minutes 1. Brookfield RVF 7 spindle at 20 rpm. 2. Approximate time during which material can remain in a mixer nozzle and still be expelled without undue force on the applicator. 3. Approximate time after application of adhesive that bonds can be made without adversely affecting wetting out of adhesive and ultimate performance levels. 4. Time to achieve approx. 50 psi Overlap Shear Strength (OLS) when cured at (73F) 23C. 3M Scotch-Weld Acrylic Adhesives DP805 DP820 Note: The following technical information and data should be considered representative Typical Cured or typical only and should not be used for specification purposes. Properties Physical Product 3M Scotch-Weld 3M Scotch-Weld Acrylic Adhesive Acrylic Adhesive DP805 DP820 Color Pale Yellow Pale Yellow 5 Shore D Hardness 79 75 6 Full Cure Time 8-24 hrs. 73F (23C) 24-48 hrs. 73F (23C) 7 Elongation 30% 50-75% 7 Tensile Strength 3200 psi Thermal Product Scotch-Weld Scotch-Weld Acrylic Adhesive Acrylic Adhesive DP805 DP820 8 Glass Transition Temperature (Tg) 140F (60C) 136F (58C) 9 -6 -6 Coefficient of Thermal Expansion 105 x 10 180 x 10 (units/units/C) 60-212F (20-100C) 68-158F (20-70C) 10 Weight Loss at Temperature 1% 275F (135C) 1% 266F (130C) by Thermal Gravimetric Analysis (TGA) 5% 451F (233C) 5% 446F (230C) Electrical Product Scotch-Weld Scotch-Weld Acrylic Adhesive Acrylic Adhesive DP805 DP820 11 Dielectric Constant 3.6 500 Hz 3.1 500 Hz 3.6 1 KHz 3.0 1 KHz 3.5 10 KHz 2.8 10 KHz 3.4 100 KHz 2.8 100 KHz 11 Dissipation Factor 0.046 500 Hz 0.083 500 Hz 0.037 1 KHz 0.065 1 KHz 0.023 10 KHz 0.032 10 KHz 0.018 100 KHz 0.022 100 KHz 12 14 12 Volume Resistivity 1.1 x 10 ohm-cm 2.2 x 10 ohm-cm 13 Dielectric Strength 3500 volts/mil 12 15 14 Surface Resistivity 2.1 x 10 ohms 1.6 x 10 ohms 5. ASTM D-2240. 6. Time to develop 80% of maximum overlap shear values. 7. Tensile and Elongation. Used procedure in 3M Test Method C-3094/ASTM D-882. Samples were 2 in. dumbbells with 0.125 in. neck and .030 in. sample thickness. Separation rate was 2 inches per minute. 8. Determined using DSC and heating rate of 68F (20C) per minute. 9. Determined using Thermal Mechanical Analysis (TMA) and heating rate of 41F (5C) per minute. First heat values given. 10. By TGA in air at 50F (10C)/min. TGA-7. 11. ASTM D-150 at 73F (23C). 12. ASTM D-257 at 73F (23C). 13. ASTM D-149 at 73F (23C). Sample thickness 14 mils. - 2 -