Datasheet

3M
™
Scotch-Weld
™
Epoxy Potting Compound/Adhesive
DP270 Clear and Black
Typical Cured
Properties
Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
Physical:
Color Clear or Black
Refractive Index @ 25°C (77°C) Clear 1.656
Cure Shrinkage .08%
Shore D Hardness 83
(ASTM D-2240)
Tack-free Time Approx. 3 hrs. @ 23°C (73°F)
UL Rating 94 HB (File No. E61941)
Cure Time 48 hrs. @ 23°C (73°F)
Thermal:
Weight Loss by TGA (in air) 1% @ 122°C (252°F)
5% @ 175°C (347°F)
10% @ 210°C (410°F)
Thermal Coefficient of Expansion by TMA
Below Tg 80 x 10
-6
units/unit/°C
5-30°C range (10-86°F range)
Above Tg 180 x 10
-6
units/unit/°C
60-125°C range (140-257°F)
Glass Transition Temperature by DSC
Onset 43°C (109°F)
Mid-Point 49°C (120°F)
Thermal Conductivity
(@ 110°F on .250" samples)
BTU - ft./ft.
2
- hr. - °F .103
Cal./sec. - cm - °C .426 x 10
3
Watt/m - °C .177
Thermal Shock Resistance
Potted Washer Olyphant Test Pass 5 Cycles without cracking
3M Test Method C-3174
+100°C (air) to -50°C (liquid)
Electrical:
Dielectric Constant 3.5 @ 1 KHz @ 23°C (73°F)
(ASTM D-150)
Dissipation Factor .018 @ 1 KHz @ 23°C (73°F)
(ASTM D-150)
Dielectric Strength 850 volts/mil
(ASTM D-149)
Volume Resistivity 4.1 x 10
14
ohm-cm
(ASTM D-257)
Insulation Resistance
(.8 mm/.8 mm comb pattern on FR-4)
60°C/96% R.H./100 volts d.c.)
Initial 3 x 10
13
ohms
1000 hrs. 2 x 10
11
ohms
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