POLYBOND-839
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. |