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LOCTITE STYCAST 2850GT CAT 27-1 – Epoxy encapsulant for components requiring heat dissipation and thermal shock resistance

  • Item Name: LOCTITE STYCAST 2850GT CAT 27-1
  • Manufacturer: Henkel
  • Product Category: Encapsulation Compound
  • Technologies: Epoxy
  • Applications: Ideal for encapsulating components that require effective heat dissipation and thermal shock resistance.
  • Color: Black
  • Cure Type: Oven Cure
  • Package Size: Contact Techniq VN for details.
  • Shelf Life: 12 months

1. Product Overview

  • Technology: Epoxy
  • Appearance: Black (Resin)
  • Components: Two-part system (requires mixing)
  • Mix Ratio:
    • By weight: 100 (Material) : 6 (Catalyst)
    • By volume: 100 (Material) : 14 (Catalyst)
  • Cure Type: Oven cure
  • Operating Temperature: -40°C to +175°C
  • Key Benefits:
    • Low Coefficient of Thermal Expansion (CTE)
    • Thermally conductive & electrically insulating
    • Good chemical resistance & mechanical strength
    • Suitable for general-purpose encapsulation

2. Applications

  • Encapsulation of components requiring heat dissipation and thermal shock resistance
  • Suitable for applications where electrical insulation and thermal conductivity are critical

3. Typical Properties

Uncured Properties

Property Part A (Resin) Part B (Catalyst) Mixed
Viscosity (mPa·s) 400,000 250-300
Density (g/cm³) 2.32 2.262
Shelf Life (@ 25°C, months) 12

Cure Schedule

Cure Method Duration Temperature
Oven Cure 4 hours 120°C

Cured Properties

Property Value
Density (g/cm³) 2.348
Hardness (Shore D) 94
Glass Transition Temperature (Tg) 140°C (DMA), 147°C (TMA)
Thermal Conductivity (W/m-K) 1.3
Volume Shrinkage on Cure (%) 1.08
Water Absorption (%) 0.02 (1 day @ 25°C), 0.07 (1 week @ 25°C)

Electrical Properties

Property Value
Volume Resistivity (Ω·cm) 5.53×10¹⁵
Surface Resistivity (Ω) 2.59×10¹⁵
Dielectric Strength (kV/mm) 20
Dielectric Constant / Dissipation Factor 4.5/0.002 (50 Hz), 5.0/0.005 (1 kHz), 4.7/0.019 (1 MHz)

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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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