• Description for 3M 2290

    21% solids liquid epoxy • B-stageable • Laminating steel cores for motor stators and rotors • Thin metal stack laminations

    *See Terms of Use Below

    Application Type Bonding, Coating
    1 Part or 2 Part 1 Part
    Material Form Liquid
    Substrate Aluminum, Copper, Glass, Metal, Plastic, Rubber, Steel, 2024 T-3 clad aluminum, Copper foil
    Industry Electronics: Coil, Core, Electronic Subassemblies, Motor, Motor Stator, Printed Circuits, Rotor, Stack
    Manufacturer 3M
    Chemistry Epoxy, Methyl Ethyl Ketone (MEK) Tetrahydrofuran, Epoxy resin
    Cure Method Solvent
    Cure Temperature (°C) 24, 177
    Cure Time (min) 30, 30 to 60
    Viscosity (cPs) 40 to 80
    Color Light Amber
    Chemical Resistance Aromatic Fuels, Hydraulic Oil, Salt spray, Tap Water
    High Temperature Resistance (°C) 149
    Low Temperature Resistance (°C) -55
    Other Resistance Aging resistance
    Density (g/cm³) 7.2 to 7.6 (weight (lbs/gal))
  • Technical Data

    Overview
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    Specifications
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  • Best Practices

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Shear Strength Test Methods
Shear Strength Type Substrate Test Temperature Test Method
High
5,000 psi Overlap shear strength 2024 T-3 clad aluminum. -55°C Tests were conducted in accordance with ASTM D-1002 methods. Properties were measured on 1" wide x 1/2" overlap specimens cut from 0.063" thick 4" x 7" bonded panels of 2024 T-3 clad aluminum. The aluminum surface was cleaned using the procedure described in the "Surface Preparation" section.
5,000 psi Overlap shear strength 2024 T-3 clad aluminum. 24°C Tests were conducted in accordance with ASTM D-1002 methods. Properties were measured on 1" wide x 1/2" overlap specimens cut from 0.063" thick 4" x 7" bonded panels of 2024 T-3 clad aluminum. The aluminum surface was cleaned using the procedure described in the "Surface Preparation" section.
3,500 psi Overlap shear strength 2024 T-3 clad aluminum. 82°C Tests were conducted in accordance with ASTM D-1002 methods. Properties were measured on 1" wide x 1/2" overlap specimens cut from 0.063" thick 4" x 7" bonded panels of 2024 T-3 clad aluminum. The aluminum surface was cleaned using the procedure described in the "Surface Preparation" section.
1,200 psi Overlap shear strength 2024 T-3 clad aluminum. 121°C Tests were conducted in accordance with ASTM D-1002 methods. Properties were measured on 1" wide x 1/2" overlap specimens cut from 0.063" thick 4" x 7" bonded panels of 2024 T-3 clad aluminum. The aluminum surface was cleaned using the procedure described in the "Surface Preparation" section.
300 psi Overlap shear strength 2024 T-3 clad aluminum. 149°C Tests were conducted in accordance with ASTM D-1002 methods. Properties were measured on 1" wide x 1/2" overlap specimens cut from 0.063" thick 4" x 7" bonded panels of 2024 T-3 clad aluminum. The aluminum surface was cleaned using the procedure described in the "Surface Preparation" section.
Peel Strength Test Methods
Peel Strength Substrate Test Temperature Test Method
High
10 (lbs/inch width) 2024 T-3 clad, 24°C Tests were performed per ASTM D-1876. Test samples were 1" wide, 2024 T-3 clad, .032" thick aluminum. The aluminum surface was cleaned using the procedure described in the “Surface Preparation” section.
Dielectric Constant Test Methods
Dielectric Constant Temperature Test Method
5.20 23°C Dielectric constant, 1 Kz
Dissipation Factor Test Methods
Dissipation Factor Temperature Test Method
0.01100 23°C Dissipation Factor, 1 Kz
Volume Resistivity Test Methods
Volume Resistivity Temp (°C)
1.2e15 (ohms/cm) 23°C
Coefficient of Thermal Expansion (CTE) Test Methods
Coefficient of Thermal Expansion (CTE) CTE Temperature (°C)
262e-6 (in./in./°C) -20 to 70°C
543e-6 (in./ in/°C) 100 to 120°C
% Solids Test Methods
% Solids Test Method
20 to 23 % By weight