3
Scotch-Weld Epoxy Adhesives
DP105 Clear
Technical Data October 2017
Product Description 3M Scotch-Weld Epoxy Adhesive DP105 Clear is available in larger
containers like 3M Scotch-Weld Epoxy Adhesive 105 B/A Clear.
3M Scotch-Weld Epoxy Adhesive DP105 Clear is a fast setting, very
flexible 1:1 mix ratio epoxy adhesive/sealant. Its flexibility when cured
makes it ideal for applications involving dissimilar surfaces where thermal
coefficient of expansion may be a problem. It is also unique in that it
retains its clear, colorless properties longer than most 5 minute epoxies.
Features 4 minute worklife High peel strength
Flexible 1:1 mix ratio
Clear
Note: The following technical information and data should be considered
Typical Uncured
representative or typical only and should not be used for specification
Physical
purposes.
Properties
Footnotes:
Product 3M Scotch-Weld Epoxy
1. Viscosity determined using 3M
Adhesive DP105 Clear
test method C-1d. Procedure
involves Brookfield RVF, #7
Base Resins Epoxy/Mercaptan
spindle, 20 rpm and 80F (27C).
Measurement taken after 1 minute
Color Base (B) Clear
rotation.
Accelerator (A) Clear
2. Worklife determined using 3M test
method C-3180. Procedure
involves periodically measuring a 2 Net Weight Base (B) 9.1 - 9.5
gram mixed mass for self-leveling
(Lbs./Gallon) Accelerator (A) 9.4 - 9.8
and wetting properties. This time
will also approximate the usable
1
Viscosity , Approximate Base (B) 1,000 - 5,000 cps
worklife in an EPX mixing nozzle.
@ 80F (27C) Accelerator (A) 8,000 - 16,000 cps
Mix Ratio (B:A) By Volume 1:1
By Weight 1:0.97
2
Worklife 2 gram 5 minutes
@ 73F (23C) 20 gram 4 minutes
3M Scotch-Weld Epoxy Adhesives
DP105 Clear
Typical Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
Cured
Properties
3M Scotch-Weld Epoxy
Footnotes:
Adhesive DP105 Clear
Physical
1. Worklife determined using 3M test
method C-3180. Procedure
involves periodically measuring a 2
Transparency and Color Clear and colorless in thin
gram mixed mass for self-leveling
bondlines
and wetting properties. This time
will also approximate the usable
worklife in an EPX mixing nozzle. Hardness Shore D (ASTM D 2240) 25-30
2. Tack-free determined per 3M test
2
Worklife 3-4 minutes
method C-3173. Involves
dispensing 0.5 gram amount of
3
adhesive onto substrate and
Tackfree Time 10 minutes
testing periodically for no
adhesive transfer to metal
4
Time to Handling Strength 20 min. @ 23C (73F)
spatula.
3. Handling strength determined per 5
Cure Time 48 hrs. @ 23C (73F)
3M test method C-3179. Time to
handling strength taken to be that
6
Elongation 120%
required to achieve a 50 psi OLS
strength using aluminum
substrates.
6
Tensile Strength 600 psi
4. The cure time is defined as that
time required for the adhesive to
achieve a minimum of 80% of
the ultimate strength as
measured by aluminum-
Thermal
aluminum OLS.
5. Tensile and Elongation. Used
Weight Loss by Thermal Gravimetric 1% @ 117C (243F)
procedure in 3M test method C-
7
Analysis (TGA) 5% @ 289C (552F)
3094/ASTM D 882. Samples
were 2" dumbbells with .0125"
8
neck and .030" sample thickness.
Thermal Coefficient of Expansion (TCE) by TMA
Separation rate was 2 inches per -6
(x 10 units/unit/C)
minute. Samples cured 2 hrs RT
Below Tg
plus 2 hrs/160F (71C).
Above Tg 181 (40-140C range)
6. Weight loss by TGA reported as
that temperature at which 5%
9
Glass Transition Temperature (Tg) by DSC
weight loss occurs by TGA in air
Onset 8C (46F)
at 5C (41F) rise per minute per
ASTM 1131-86.
Mid-Point 15C (59F)
7. TCE determined using Dupont
10
TMA Analyzer using a heating rate Thermal Conductivity
of 50F (10C) per minute. Second
(@ 110F on .250" samples)
heat values given.
2
BTU-ft./ft. - hr.-F .085
-3
8. Glass Transition Temperature (Tg)
Cal./sec -cm-C .35 x 10
determined using Perkin Elmer DSC
Watt/m-C .147
Analyzer with a heating rate of
68F (20C) per minute. Second
11
Thermal Shock Resistance
heat values given.
Potted Washer Olyphant Test Pass 5 cycles
9. Thermal conductivity
(3M/AdhD Test Method C-3174 without cracking
determined using ASTM C177
+100C [air] to -50C [liquid])
and C-matic Instrument using 2
inch diameter samples.
10. Thermal shock resistance run per
3M test method C-3174. Involves
potting a metal washer into a 2" x Electrical
0.5" thick section and cycling this
test specimen to colder and
Dielectric Constant @ 1 KH
z 9.2
colder temperatures.
@ 23C (73F) [ASTM D 150]
Dissipation Factor @ 1 KHz 0.22
@ 23C (73F) [ASTM D 150]
Dielectric Strength (ASTM D 149) 465 volts/mil
Sample Thickness Approx. 30 mil
10
- 2 -
Volume Resistivity (ASTM D 257) 1.5 x 10 ohm-cm