Impregnation type


By utilizing a curing system of perfect-liquid type, these adhesives can cure properly, and they can attach parts together without poor curing due to separation even when they are applied in narrow gaps or in minute amounts.

  • They cure completely when heated at a temperature of 80degC to 120degC for a time period of 30 minutes to 60 minutes
  • They can be used in precision machines such as parts of HDD because the cured matter gives off very little gas. (variety:AE-780)
  • They have superior pot life at room temperature, and so exhibit excellent stability when being dispensed.
  • They meets Br and Cl requirements for halogen free as defined in IEC 61249-2-21.
    (IEC 61249-2-1 definition:900 ppm maximum chlorine, 900 ppm maximum bromine, 1500 ppm maximum total halogens)


  • Assembly of an HDD spindle motor
  • Motor magnet bonding
Example of HDD spindle motor bonding
ITEM AE-740 AE-780 Conditions
before curing
Appearance Black
viscous Liquid
viscous Liquid
Visual observation
Viscosity 13Pa・s 9Pa・s E-type viscometer,
25degC 50rpm
Thixotropic index 1.3 1.1 E-type viscometer,
25degC, 5rpm/50rpm
Specific gravity 1.2 1.2 25degC
Gel time 22sec
at 80degC
at 90degC
Hot plate
Recommended cure schedule 60min
at 80degC
at 90degC
Convection oven
after curing
Lap shear strength 18N/mm2 18N/mm2 JIS K-6850
(steel plate)
T-peel strength 45N/25mm 15N/25mm JIS K-6854-3
(steel plate)
Glass transition
51degC 101degC TMA
Coefficient of
Thermal Expansion
α1 94ppm 83ppm
α2 179ppm 154ppm
Flexural modulus 3.5GPa 3.1GPa DMS,25degC
Water absorption 0.60% 1h boiling
Shore hardness 80 88 Shore D hardness

Technical data presented in this document are typical experimental values and do not signify any of the products’ specifications. The data may be revised without prior notice.

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