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LOCTITE STYCAST 1090 CAT 27-1 – Epoxy Encapsulant – Lightweight syntactic foam for aerospace electronic encapsulation and potting

  • Item Name: LOCTITE STYCAST 1090 CAT 27-1
  • Manufacturer: Henkel Corporation
  • Product category: Epoxy encapsulant
  • Technologies: Low density syntactic foam featuring low CTE, low dielectric constant, low shrinkage, excellent moisture and chemical resistance
  • Applications: Designed for encapsulating and potting lightweight electronic assemblies in aerospace applications.
  • Color: Black (also available in white)
  • Cure type: Oven Cure
  • Package size: Contact to Techniq VN for details
  • Shelf life: 12 months

1. Product Overview

LOCTITE STYCAST 1090 CAT 27-1 is a two-component epoxy encapsulant designed for electronic assemblies requiring lower weight, such as aerospace applications. It offers:

  • Low density syntactic foam
  • Low coefficient of thermal expansion (CTE)
  • Low dielectric constant
  • Low shrinkage
  • Good moisture and chemical resistance
  • High physical strength

Curing Method: Oven cure (4 hours at 120°C)
Operating Temperature: -40 to 175°C
Available Colors: Black, White

2. Applications

  • Encapsulation and potting of electronic components
  • Aerospace applications requiring lightweight materials

3. Typical Properties

Uncured Properties
Property Part A (Resin) Part B (Hardener) Mixed
Appearance Black
Viscosity (mPa·s @ 25°C) 135,000 250 – 300
Specific Gravity 0.85
Density (g/cm³) 0.827
Shelf Life (@ 25°C, months) 12
Cured Properties
Property Value
Density (g/cm³) 0.849
Glass Transition Temperature (Tg, °C) (DMA / TMA) 129 / 83
Thermal Conductivity (W/m-K) 0.18
Hardness (Shore D) 80
Volume Shrinkage on Cure (%) 2.7
Water Absorption (%): 1 day / 1 week @ 25°C 0.07 / 0.3
Electrical Properties
Property Value
Volume Resistivity (ohm-cm) 1.8 × 10¹⁵
Surface Resistivity (ohms) 9.3 × 10¹³
Dielectric Strength (kV/mm) 24
Dielectric Constant / Dissipation Factor 50 Hz: 3.2 / 0.124
1 kHz: 3.0 / 0.032
1 MHz: 2.7 / 0.023

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BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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