PERMABOND MT382

Harmonization Code : 3904.61.00.00 | Polytetrafluoroethylene plates / sheets / film / tape / strip, self-adhesive, in rolls

PERMABOND MT382

Main features

  • Self-Leveling Electronic Potting
  • Extended 20-50 Minute Pot Life
  • High-Elongation Modified Epoxy

Product Description

Permabond MT382 is a two-part, self-leveling modified epoxy adhesive for sealing, bonding, electronic potting, and encapsulation. The system mixes 2:1 by volume and combines a 20-50 minute pot life at 25 deg C with a 105-120 minute handling time. Part A is a black epoxy resin and Part B is a yellow polyamine hardener, producing a charcoal-black mixed material. The cured epoxy provides 150-200% elongation, 140-160 N/25 mm peel strength on aluminum, and 0.47 W/(m K) thermal conductivity. Applications include nylon, ABS, polycarbonate, other supported plastics, and metal assemblies.

Key features

  • Self-Leveling Potting: Flows for electronic potting, encapsulation, sealing, and bonding.
  • Extended Processing Window: Provides a 20-50 minute pot life at 25 deg C.
  • Flexible Cured Epoxy: Provides 150-200% elongation with 140-160 N/25 mm aluminum peel strength.

Applications

Applications include electronic potting and encapsulation, sealing, and bonding of nylon, ABS, polycarbonate, other supported plastics, and metal assemblies.

Product Family

PERMABOND MT382

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Black / Yellow
Component System
Describes the number of components that must be supplied, mixed, or activated before application or cure.
Two (Epoxy Resin / Polyamine based Hardener)
Mix Ratio
The amount of a constituent divided by the total amount of all other constituents in a mixture
2:1 by volume
Pot Life
Pot life is the amount of time it takes for the viscosity of a material to double (or quadruple for lower viscosity materials) in room temperature after a material is mixed. It is closely related to work life but it is not application dependent, less precise and more of a general indication of how fast a system is going to cure.
20-50 minutes
Other Properties
Maximum gap fill
0.5 mm
Electrical Properties
Dielectric Strength
Dielectric strength is measured in kV per mm and is calculated by the Breakdown voltage divided by the thickness of the tested material. Those two properties go hand in hand and while Breakdown voltage is always thickness dependent, dielectric strength is a general material property. As an example, the dielectric strength of Polyimide is 236 kV/mm. If we place 1mm of Polyimide between two electrodes, it will act as an insulator until the voltage between the electrodes reaches 236 kV. At this point it will start acting as a good conductor, causing sparks, potential punctures and current flow.
20 - 30 kV/mm
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
1 - 3 x 10¹¹ Ohms⋅cm
Mechanical Properties
Elongation
Elongation is the process of lengthening something. It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks. It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
150 -200 %
Peel Strength
140-160 N/25mm
Thermal Properties
Thermal Conductivity
Thermal conductivity describes the ability of a material to conduct heat. It is required by power packages in order to dissipate heat and maintain stable electrical performance. Thermal conductivity units are [W/(m K)] in the SI system and [Btu/(hr ft °F)] in the Imperial system.
0.47 W/m.K

Additional Information

Technical properties

As supplied / before processing

Part A and Part B values are shown separately; processing values apply after the stated mix ratio.

Property Value Unit Method / condition
Part A viscosity32,000mPa sAt 25 deg C
Part B viscosity300mPa sAt 25 deg C
Specific gravityPart A: 1.3; Part B: 1.0As supplied
Mix ratio2:1; 130:50By volume; by weight
Maximum gap fill0.5mmTypical curing property
Usable / pot life20-50minutesAt 25 deg C
Handling time105-120minutesTo 0.1 N/mm2 at 25 deg C
Full cure>=72hoursAt 25 deg C
Technical properties

After processing / final state

Property Value Unit Method / condition
Hardness55-85 Shore A; 20-30 Shore DISO 868
Elongation at break150-200%ISO 37
Peel strength - aluminum140-160N/25 mmISO 4578
Thermal conductivity0.47W/(m K)Typical cured value
Coefficient of thermal expansion112 x 10^-6; 170 x 10^-6m/m/deg CBelow Tg; above Tg
Glass transition temperature, Tg-35deg CTypical cured value

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