PERMABOND TA459

Harmonization Code : 3907.30.00.40 | Epoxy Mold Compounds containing by weight more than 70 % silicon dioxide

PERMABOND TA459

Main features

  • 20-40 Second Steel Fixture
  • 20-25 N/mm2 Steel Shear
  • Non-Corrosive Copper Bonding

Product Description

Permabond TA459 is a no-mix toughened acrylic structural adhesive for bonding metals, ferrites, ceramics, and selected thermoplastics. It is used with Initiator 41 or 41M, or Initiator 43 for plastics, with the initiator applied to one surface and adhesive to the other. The thixotropic formulation fills gaps up to 0.5 mm, fixtures gap-free mild steel in 20-40 seconds at 23 deg C, and reaches working strength in 3-5 minutes. After 24 hours at 25 deg C, typical steel shear strength is 20-25 N/mm2. The acid-free formulation is non-corrosive to sensitive copper and conductive surfaces.

Key features

  • 20-40 Second Fixture: Fixtures gap-free mild steel in 20-40 seconds at 23 deg C.
  • No-Mix Initiator Process: Uses separate adhesive and initiator application without premixing.
  • Non-Corrosive Conductive-Surface Bonding: Acid-free formulation supports sensitive copper and conductive surfaces.

Applications

Applications include structural bonding of metals, ferrites, ceramics, selected thermoplastics, and sensitive conductive surfaces with the specified initiator.

Product Family

PERMABOND TA459

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Blue, thixotropic
Mix Ratio
The amount of a constituent divided by the total amount of all other constituents in a mixture
10:1.5 approximately
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.1
Physical Properties
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow. Viscosity is commonly measured in centiPoise (cP). One cP is defined as the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP. A product like honey would have a much higher viscosity -around 10,000 cPs- compared to water. As a result, honey would flow much slower out of a tipped glass than water would. The viscosity of a material can be decreased with an increase in temperature in order to better suit an application
15,000 – 25,000 mPa.s
Other Properties
Maximum gap fill
0.5 mm
Storage Temperature
5 - 25 °C
Curing Conditions
Fixture Time
20-40 seconds
Mechanical Properties
Peel Strength
85-100 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.
0.1 W/m.K
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.
30-50 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.
2 x 10¹³ Ohms⋅cm

Additional Information

Technical properties

As supplied / before processing

Resin values are shown with processing values for the specified Permabond initiator system.

Property Value Unit Method / condition
AppearanceBlue, thixotropicAs supplied
Viscosity15,000-25,000mPa s20 rpm at 25 deg C
Low-shear viscosity50,000-100,000mPa s2.5 rpm at 25 deg C
Specific gravity1.1Resin as supplied
Use ratioApprox. 10:1.5Adhesive to Initiator 41 or 41M
Maximum gap fill0.5mmTypical curing property
Cure milestonesFixture: 20-40 seconds; handling: 40-75 seconds; working strength: 3-5 minutes; full cure: 24 hoursMild steel, no gap, at 23 deg C
Storage temperature5 to 25deg CRecommended storage range
Technical properties

After processing / final state

Values are typical for cured adhesive; strength depends on surface preparation, gap, cure, and substrate.

Property Value Unit Method / condition
Shear strength - steel20-25N/mm2ISO 4587; 24-hour cure at 25 deg C
Shear strength - steel to ferrite>14N/mm2ISO 4587; 24-hour cure at 25 deg C; substrate failure
Shear strength - zinc12-18N/mm2ISO 4587; 24-hour cure at 25 deg C
Peel strength - aluminum85-100N/25 mmISO 4578
Tensile strength20-30N/mm2ISO 37
Impact strength15-20kJ/m2ASTM D-950
Dielectric strength30-50kV/mmASTM D-149
Volume resistivity2 x 10^13ohm cmASTM D-257

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