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LOCTITE STYCAST 2850KT CAT 24LV – Epoxy Encapsulant – Heat sink replacement and high voltage electrical applications

  • Item Name: LOCTITE STYCAST 2850KT CAT 24LV
  • Manufacturer: Henkel Corporation
  • Product category: Thermally conductive epoxy encapsulant
  • Technologies: Two-component epoxy system with low CTE, high thermal conductivity, electrical insulation, low viscosity, and excellent adhesion; compatible with various catalysts
  • Applications: Recommended for encapsulating components for heat sink replacement and high voltage applications
  • Color: Blue liquid (resin)
  • Cure type: Room temperature cure and Heat cure
  • Package size: Contact to Techniq VN for details
  • Shelf life: 12 months

1. Product Overview

  • Technology: Epoxy
  • Appearance: Blue liquid
  • Components: Two-component system
  • Mix Ratio:
    • By weight: 100:4 (Material:Catalyst)
    • By volume: 100:11.5 (Material:Catalyst)
  • Key Benefits:
    • High thermal conductivity & electrical insulation
    • Low viscosity, low CTE
    • Excellent adhesion, thermal shock, and impact resistance
    • Excellent low-temperature properties
  • Cure Options: Room temperature & heat cure
  • Operating Temperature: -65 to +105°C

2. Applications

  • Encapsulation for electrical components
  • Heat sink replacement in non-integrated electrical assemblies
  • High voltage applications to prevent surface arching or tracking

3. Typical Properties

Uncured Properties

Property Part A (Resin) Part B (CAT 24LV) Mixed
Viscosity (mPa·s) 165,000 18 22,000
Density (g/cm³) 2.75 2.7
Work Life (100g @ 25ºC, min) 30
Shelf Life (@ 25°C, months) 12

Curing Performance

Cure Condition Time
Room Temp. (25°C) 8-16 hours
Heat Cure (45°C) 2-4 hours
Heat Cure (65°C) 30-60 min
Post Cure (65°C) 2-4 hours

Cured Properties

Property Value
Hardness (Shore D) 92
Flexural Strength (N/mm²) 100 (14,500 psi)
Compressive Strength (N/mm²) 105 (15,200 psi)
Linear Shrinkage (cm/cm) 0.0009
Water Absorption (24h, %) 0.07
Coefficient of Thermal Expansion (10⁻⁶/°C) Alpha 1: 24.3 / Alpha 2: 78.7
Glass Transition Temperature (°C) 40
Thermal Conductivity (W/m·K) 2.29

Electrical Properties

Property Value
Dielectric Strength (kV/mm) 14
Dielectric Constant (@ 1MHz) 6.45
Dissipation Factor (@ 1MHz) 0.048
Volume Resistivity (Ω·cm @ 25°C) >1×10¹⁵

Outgassing Properties (NASA RP 1124, 16h @ 65°C)

Property Value
TML (%) 0.34
CVCM (%) 0.01

BERGQUIST microTIM mTIM 1028 Thermal Interface Coating High performance thermal management solution for nickel finished heat sinks, optical transceivers, and data center liquid cooling systems

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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