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3M

Epoxy Adhesive

DP420 Black • DP420 NS Black • DP420 Off-White • DP420 LH

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.

The properties of cured 3M™ Scotch-Weld™ Epoxy Adhesive DP420 NS Black

and 3M™ Scotch-Weld™ Epoxy Adhesive DP420 LH are expected to be similar to

the properties of 3M™ Scotch-Weld™ Epoxy Adhesive DP420 Black and 3M™

Scotch-Weld™ Epoxy Adhesive DP420 Off-White, respectively as described by

data in the following sections of this technical data sheet.

An exception to this is the concentration of halogens in 3 M ™ Scotch-Weld™

Epoxy Adhesive DP420 LH. 3M™ Scotch-Weld™ Epoxy Adhesive DP420 LH is

a form of 3M™ Scotch-Weld™ Epoxy Adhesive DP420 Off-White that can be

considered “low halogen”. Low halogen is defined by the Electrotechnical

Commission (IEC) 61249-2-21 standard as having less than 900 ppm chlorine,

900 ppm bromine, and less than 1500 ppm total chlorine and bromine.

3M

™ Scotch-Weld™ Epoxy Adhesive DP420 LH Test Results

Halogens (determined by ion chromatography)

Total Chlorine (ppm)

Total Bromine (ppm)

Total Halogens (ppm)

720

<5

<800

Product

3M

™ Scotch-Weld™

Epoxy Adhesive

DP420 Black

3M

™ Scotch-Weld™

Epoxy Adhesive

DP420 Off-White

Physical

Color

Black

Opaque, off-white

Shore D Hardness

75-80

75-80

Thermal

Coefficient of Thermal

Expansion

Below Tg

(in./in./°C)

Above Tg

Thermal Conductivity

0.104

0.104

Electrical

Dielectric Strength (ASTM D 149)

888 volts/mil

690 volts/mil

Volume Resistivity (ASTM D 257)