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LOCTITE STYCAST 2850FTJ CAT 11 – Epoxy Encapsulant – Encapsulation of components requiring heat dissipation, thermal shock resistance, and high voltage insulation

  • Item Name: LOCTITE STYCAST 2850FTJ CAT 11
  • Manufacturer: Henkel Corporation
  • Product category: Epoxy encapsulant
  • Technologies: Two-component epoxy formulation with low CTE and excellent thermal conductivity
  • Applications: Ideal for encapsulating components in high voltage applications requiring heat dissipation and thermal shock resistance
  • Color: Black liquid (resin); also available in blue or unpigmented versions
  • Cure type: Heat cure
  • Package size: Contact to Techniq VN for details
  • Shelf life: 6 months (180 days at 25°C)

1. Product Overview

LOCTITE STYCAST 2850FTJ CAT 11 is a two-component epoxy encapsulant designed for high-voltage applications. It offers good thermal conductivity, low coefficient of thermal expansion (CTE), and excellent electrical insulation properties. The product is available in both black and blue colors.

2. Applications

  • Encapsulation of electronic components requiring heat dissipation and thermal shock resistance.
  • High-voltage applications.
  • Compatible with multiple catalysts for varied performance characteristics.

3. Typical Properties

Uncured Properties

Property LOCTITE STYCAST 2850FTJ LOCTITE CAT 11 Mixed (STYCAST 2850FTJ + CAT 11)
Viscosity (mPa·s) 225,000 (Brookfield, Spindle 7, 5 rpm) 48 (@ 65°C) 64,000 (Brookfield, 25°C)
Density (g/cm³) 2.4 2.29
Work Life (@ 25°C, 100g) >4 hours
Shelf Life (@ 25°C) 180 days

Curing Performance

Temperature Cure Time
80°C 8 – 16 hours
100°C 2 – 4 hours
120°C 30 – 60 minutes
A post-cure of 2 to 4 hours at the maximum expected operating temperature is recommended for optimal performance.

Cured Properties

Physical & Thermal Properties

Property Value
Hardness (Shore D) 96
Linear Shrinkage (%) 0.2
Water Absorption (24h) (%) 0.05
Coefficient of Thermal Expansion (ppm) Alpha 1: 31.2, Alpha 2: 97.9
Glass Transition Temperature (°C) 115
Thermal Conductivity (W/m-K) 1.28

Electrical Properties

Property Value
Dielectric Strength (kV/mm) 15.0
Dielectric Constant/Dissipation Factor (1 MHz) 5.36 / 0.043
Volume Resistivity (Ω·cm @ 25°C) 1×10¹⁵

Mechanical Properties

Property Value
Flexural Strength (N/mm²) 117 (17,000 psi)
Compressive Strength (N/mm²) 193 (27,900 psi)

Outgassing Properties (NASA Reference Publication 1124, cured 4h @ 80°C)

Property Value
TML (%) 0.29
CVCM (%) 0.02

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