Datasheet

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Scotch-Weld

Epoxy Potting Compound/Adhesive

DP270 Clear and Black

Product Description

Scotch-Weld

Epoxy Potting Compound/Adhesive DP270 (or 3M™ Scotch-

Weld™ Epoxy Potting Compound/Adhesive 270 B/A) is a two-part, low viscosity

epoxy resin system designed primarily for potting, sealing, and encapsulation of

many electronic components and is available in clear or black. Scotch-Weld epoxy

potting compound/adhesive DP270 is noncorrosive to copper and offers good

thermal shock resistance and excellent retention of electrical insulation properties

under high humidity conditions.

Scotch-Weld epoxy potting compound/adhesive DP270 has a work life of

approximately 70 minutes, a tack-free time of about 3 hours and is fully cured after

48 hours at 73°F (23°C). This product produces no exotherm in 5-10 gram masses

and a very slight exotherm in larger masses.

Scotch-Weld epoxy potting compound/adhesive DP270 is ideal for the potting and

encapsulation of many heat sensitive or delicate components such as glass diodes

and sensors as well as for transformers, coils, chokes, relays, etc. It is available in

the convenient 3M™ EPX™ Applicator System for multi-station usage and in bulk

containers for larger volume applications.

Available in bulk containers as Scotch-Weld epoxy potting compound/adhesive

270 B/A.

Features

• Good Thermal Shock Resistance • Excellent Electrical Properties

• Meets UL 94 HB (File No. E61941) • Noncorrosive to Copper

• Long Worklife • Negligible Exotherm

Technical Data December, 2009

Typical Uncured

Properties

Note: The following technical information and data should be considered representative

or typical only and should not be used for specification purposes.

Color: Clear or Black

Base Resin: Epoxy/amine

Mix Ratio: 1:1 by volume (1:0.85 B:A by weight)

Net Weight: Base 9.6 - 9.8

Lbs./Gal. Accelerator 8.0 - 8.2

Worklife: 60-70 minutes @ 23°C (73°F)

Viscosity: Base 7000 - 16,000 cps

@ 23°C (73°F) Accelerator 6000 - 12,000 cps

Summary of content (8 pages)

PAGE 1
3 Scotch-Weld TM Epoxy Potting Compound/Adhesive DP270 Clear and Black Technical Data Product Description December, 2009 3M TM Scotch-Weld TM Epoxy Potting Compound/Adhesive DP270 (or 3M™ ScotchWeld™ Epoxy Potting Compound/Adhesive 270 B/A) is a two-part, low viscosity epoxy resin system designed primarily for potting, sealing, and encapsulation of many electronic components and is available in clear or black.
PAGE 2
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 (ASTM D-2240) 83 Tack-free Time Approx. 3 hrs. @ 23°C (73°F) UL Rating 94 HB (File No. E61941) Cure Time 48 hrs.
PAGE 3
M™ Scotch-Weld™ Epoxy Potting Compound/Adhesive DP270 Clear and Black Note: The following technical information and data should be considered representative or typical only and should not be used for specification purposes. Dissipation Factor Versus Frequency Dielectric Constant Versus Frequency 3.8 .025 3.6 Dielectric Constant .030 .020 .015 3.4 3.2 .010 3.0 100Hz 1 KHz 10 KHz 100 KHz 1 MHz 100Hz 1 KHz FREQUENCY 10 KHz 15 14 13 12 11 0 100 KHz FREQUENCY Insulation Resistance .
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3M™ Scotch-Weld™ Epoxy Potting Compound/Adhesive DP270 Clear and Black Typical Cured Properties (continued) Note: The following technical information and data should be considered representative or typical only and should not be used for specification purposes. Corrosion: Per ASTM D-3482 (35°C/95°F/96% R.H./45V d.c./15 days) Pass - No copper corrosion Per 3M Test Method C-708 (45°C/113°F/96% R.H./250V d.c./5 days) (65°C/149°F/96% R.H./250V d.c.
PAGE 5
3M™ Scotch-Weld™ Epoxy Potting Compound/Adhesive DP270 Clear and Black 3M™ EPX™ Pneumatic Applicator Delivery Rates 200 ml Applicator – Maximum Pressure 58 psi Adhesive* 6mm Nozzle gms/minute 10mm Nozzle gms/minute 38.2 148.8 3M™ Scotch-Weld™ Epoxy Potting Compound/Adhesive DP270 Black 50 ml Applicator – Maximum Pressure 50 psi 1/4 in. Nozzle gms/minute Adhesive* 3M™ Scotch-Weld™ Epoxy Potting Compound/Adhesive DP270 Clear Scotch-Weld epoxy potting compound/adhesive DP270 Black 75.6 68.
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3M™ Scotch-Weld™ Epoxy Potting Compound/Adhesive DP270 Clear and Black Handling/Curing Information (continued) 3. For maximum bond strength apply product evenly to both surfaces to be joined. 4. Application to the substrates should be made within 70 minutes. Larger quantities and/or higher temperatures will reduce this working time. 5. Join the adhesive coated surfaces and allow to cure at 60°F (16°C) or above until firm. Heat up to 200°F (93°C) will speed curing. 6.
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3M™ Scotch-Weld™ Epoxy Potting Compound/Adhesive DP270 Clear and Black Surface Preparation For high strength structural bonds, paint, oxide films, oils, dust, mold release agents and all other surface contaminants must be completely removed. However, the amount of surface preparation directly depends on the required bond strength and the environmental aging resistance desired by user. The following cleaning methods are suggested for common surfaces: Steel 1.
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3M™ Scotch-Weld™ Epoxy Potting Compound/Adhesive DP270 Clear and Black Storage Store product at 60-80°F (16-27°C) for maximum storage life. Shelf Life These products when stored in original, unopened container have a shelf life of two years for bulk containers and 15 months in duo-pak containers. Precautionary Information Refer to Product Label and Material Safety Data Sheet for health and safety information before using this product.