UnderDevelopment

Soft ferrite material

Urethane-based Magnetic Resinwith High Thermal Conductivity
FEATURESUrethane-based magnetic resins are pasty products having permeability and produced by mixing TODA KOGYO’s
soft ferrite powders and two-part urethane resins. They become flexible curable resin in 24 hours after mixing
the two components. They are siloxane-free without concern for contact failure and adhere to various substrates.
They can reduce the deterioration of magnetic properties due to magnetic flux leakage by filling the voidsin the magnetic parts. Consequently, their inductance can be improved in addition to the downsizing and low
profile of the components, by using them for the sealing of wire-wound inductors and noise suppression.

CHARACTERISTICS
High permeability andthermal conductivity

They show high permeability and thermal conductivity due tothe high filling of soft ferrite powders and other materials.

Excellent resin flowability andhigh shape-following property

They exhibit excellent flowability and high shapefollowing property due to the dispersion technology.

SPECIFICATIONS【Characteristics of typical samples】
Ni-Zn ferrite

Appearance (Liquid A)
Appearance (Liquid B)

Test methods－－

Mn-Zn ferrite

MG-007(Standard)

MG-010(High thermalconductivity)

MG-001(Standard)

MG-003(High thermalconductivity)

Visual check

Black viscous liquid

Black viscous liquid

Black viscous liquid

Black viscous liquid

Visual check

Black viscous liquid

Black viscous liquid

Black viscous liquid

Black viscous liquid

ASTM D2556

325

300

520

400

Viscosity@1/s (Liquid A)

Pa･ s

Viscosity@1/s (Liquid B)

↑－↑
－

315

290

500

385

－25℃ /24h

25℃ /24h

25℃ /24h

25℃ /24h

Permeability@100MHz

S-parameter method (coaxial pipe)

12.36.4

14.3

9.8

Thermal conductivity

W/mK

ASTM D5470

1.6

2.0

1.6

2.0

JIS K7312

95959595

JIS K7112

3.9

3.7

3.9

3.8

Glass transition temperatureg/cm3℃

JIS K7121

-31

-31

-31

-31

Electrical resistanceΩ・cm

JIS K7194≧1.0×107≧1.0×107≧1.0×107≧1.0×107

Curing conditions

Hardness (Asker C)
After curing

Unit

DensityHeat-resistant time (150℃)※

Heat-resistant time (170℃)※－hourhourTensile strength(1)205, (2)265

Elongation rate(1)195, (2)900

Hardness(1)330, (2)500

Tensile strength(1)205, (2)250

Elongation rate(1)150, (2)255

Hardness(1)205, (2)315※ Time when the value becomes (1) ±30%, (2) ±50% of the initial value

201020500.01

1Frequency (GHz)【Frequency dependence of permeability】

10

Magnetic resin
partMG-007(Standard) ε'MG-010(High TH conductivity) ε'MG-001(Standard) ε'

100.1

3.2 mm30Permittivity

15Permeability

40

MG-007(Standard) µ'
MG-007(Standard) µ"
MG-010(High TH conductivity) µ'MG-010(High TH conductivity) µ"MG-001(Standard) µ'
MG-001(Standard) µ"
MG-003(High TH conductivity) µ'MG-003(High TH conductivity) µ"

00.01

MG-003(High TH conductivity) ε'2.0 mm

Before curing

Item

Base material
part0.1110

Frequency (GHz)【Frequency dependence of dielectric constant】

Capable of filling even narrow gaps
due to high shape-following capability.

APPLICATIONSManufacturer● Sealing materials for wire-wound inductors● Wireless power transfer materials ● Noise suppression materials

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Tel +81-3-5439-6040

E-mail: webmaster@todakogyo.co.jp

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Ver. May 2024