Equal ratio mix EPOXY adhesive
DESCRIPTION
PB 839 is a 100% solids epoxy system. It is a filled, thixotropic paste compound. Polybond 839 can be cured at room temperature or at elevated temperatures. It has exceptional mechanical bond, and has good adhesion to glass, ceramics, most metals, and plastics.
PROPERTIES - UNCURED Part A Part B
| Color , visual ......... |
Neutral |
Black |
| Viscosity, ASTM-D-2393 (c.p.s. @ 25o C).. |
Paste |
Paste |
| Specific Gravity ............ |
1.20 |
.99 |
| Mix Ratio (by volume)......... |
1:1 |
| Pot Life @ 25OC (100 grams) ..... |
45-60 minutes |
| Shelf Life @ 70o F .......... |
12 months minimum |
'
PROPERTIES - CURED
| Hardness, ASTM-D-2240(Durometer)....... |
Shore D 70 |
| Tensile Strength, ASTM-D-638 ....... |
5,500 psi |
| Tensile Elongation, ASTM-D-638 ...... |
2.8 % |
| Flexural Strength, ASTM-D-790......... |
5,800 psi |
| Water Absorption............. |
0.08% |
| Dielectric Strength, ASTM-D-149 (volts/mil) ... |
405 |
| Dielectric Constant, ASTM-D-150 ........ |
3 |
| Dissipation Factor, ASTM-D-150........ |
0.002 |
| Volume Resistivity, ASTM-D-257 (ohm-cm)..... |
1 x 1014 |
MIXING INSTRUCTIONS
Measure equal parts by volume (A to B - 1:1). Mix thoroughly scraping the sides and bottom of the container. Evacuate and then apply to surface.
CURE SCHEDULE
Room temperature cure @75°F with full properties after 24 hours.
To accelerate cure, allow 2 hours @ room temperature, then 2 hours @ 125°F.
