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Elan-tron® MC 4236 / W 4236 – 2-component epoxy potting compound for encapsulation, sealing, and electrical insulation

Item Name: Elan-tron® MC 4236 / W 4236
Manufacturer: ELANTAS Beck India Ltd.
• Technologies: Two-component filled epoxy system, thermal class H, high thermal conductivity, UL 94 V-0, RoHS compliant
Color: Resin – Black filled; Hardener – Colorless to pale yellow
Cure Type: Room temperature or 50°C post-curing
Package Size: Resin: 6 kg metal container & 15 kg plastic container; Hardener: 5 kg polyethylene container
Shelf Life: 12 months

1. Product Overview

  • Type: Two-component, filled, epoxy potting compound.

  • Features: Self-extinguishing, thermal class H (180°C), high thermal conductivity, good electrical & mechanical properties.

  • Certifications: UL 94 V-0 listed (File E143115, E116643), RoHS compliant (2002/95/EC).

  • Form: Resin (black, filled) + Hardener (amine, colorless to pale yellow liquid).


2. Applications

  • Encapsulation, sealing, and impregnation of electrical and electronic components.

  • Suitable for manual/automatic casting, especially under vacuum with mixing/dispensing devices.

  • Cures at room temperature or elevated temperature (recommended curing cycle: 24 h at 25°C or 6 h at 50°C).

3. Typical Properties

(A) Unmixed Components

Property Resin (MC 4236) Hardener (W 4236)
Colour & Appearance Black, filled resin Colorless to pale yellow liquid
Type of compound Epoxy resin Amine
Viscosity 15,000 – 25,000 mPa·s (50°C) 35 – 55 mPa·s (25°C)
Density 1.79 – 1.83 g/ml (25°C) 0.97 – 1.01 g/ml (25°C)
Storage stability 12 months (sealed, RT) 12 months (sealed, RT)

(B) Mixed System (Resin + Hardener)

Property Value / Range
Mixing ratio (by weight) 100 : 8
Mixing ratio (by volume) 100 : 15
Initial viscosity at 25°C 4,000 – 6,500 mPa·s
Initial viscosity at 40°C 2,500 – 4,000 mPa·s
Initial viscosity at 60°C 1,200 – 1,800 mPa·s
Pot life (40°C) 20 – 30 min
Pot life (60°C) 10 – 15 min
Gel time at 25°C 3 – 4 h
Gel time at 50°C 30 – 40 min
Demoulding time at 25°C 10 – 12 h
Recommended curing cycle 24 h at 25°C or 6 h at 50°C

(C) Cured Properties (24 h at 25°C + 15 h at 60°C)

Property Value / Range
Surface Bright
Density (25°C) 1.70 – 1.74 g/ml
Hardness (Shore D) 83 – 87
Glass transition (Tg) 40 – 50 °C
Thermal expansion (Tg -10°C) 25 – 35 ×10⁻⁶/°C
Thermal expansion (Tg +10°C) 105 – 125 ×10⁻⁶/°C
Flammability UL 94 V-0 (3.2 mm)
Thermal conductivity 0.85 – 0.95 W/m·K
Flexural strength 40 – 50 MPa
Flexural modulus 5,000 – 6,000 MPa
Strain at break (flexural) 1.0 – 1.5 %
Tensile strength 25 – 35 MPa
Elongation at break 0.8 – 1.6 %

(D) Dielectric Properties (Cured)

Property Value / Range
Dielectric strength (2 mm, RT) 18 – 20 kV/mm
Volume resistivity (RT) 1 × 10¹⁵ – 8 × 10¹⁵ Ω·cm
Dielectric constant (250 V/50 Hz, RT) 3.4 – 4.5
Dissipation factor (250 V/50 Hz, RT) 0.035 – 0.045
Tracking resistance (CTI, RT) >600

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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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