Applications

Elan-tron® PU 4110 / PH 4900 – High-elasticity, cold-flexible polyurethane for protective casting in extreme temperatures

Item Name: Elan-tron® PU 4110 / PH 4900

Manufacturer: ELANTAS Beck GmbH

Technologies: Two-component, high-elasticity modified polyurethane with rubber-like properties, cold-flexible down to –50°C

Color: Resin – White-beige; Hardener – Brown transparent

Cure Type: Room temperature (6–8 h), optional post-curing at 80°C (12–16 h)

Package Size: Contact to Techniq VN for details.

Shelf Life: 6 months

1. Product Overview

Elan-tron® PU 4110, combined with hardener PH 4900 (or PH 4920), forms a highly elastic, rubber-like polyurethane casting compound. It provides exceptional cold flexibility down to –50°C, strong adhesion, low shrinkage, and durable dielectric properties. The material withstands continuous operating temperatures up to 150°C (Thermal Index) while maintaining elasticity. It also shows high chemical resistance in moist, alkaline, or acidic environments, making it suitable for demanding outdoor or hazardous applications.


2. Applications

  • Encapsulation of pressure-sensitive components in outdoor and explosion-protected environments.

  • Devices requiring operation between –50°C to +150°C.

  • Electrical and electronic parts exposed to vibration, extreme cold, or chemically aggressive conditions (e.g., silos).

3. Typical Properties

Property Conditions Resin (PU 4110) Hardener (PH 4900) After Mixed & Cured
Colour White-beige Brown-transparent Beige, elastomeric
Viscosity 25°C 6500 ± 1000 mPa·s 110 ± 30 mPa·s 4900 mPa·s
Density 20°C 1.12 ± 0.05 g/cm³ 1.23 ± 0.05 g/cm³ 1.16 ± 0.02 g/cm³
Shelf Life 23°C 6 months 6 months
Mixing Ratio 100:20 (w/w)
Pot Life 23°C, 15 ml ~40 min
Curing 6–8 h at RT; post-cure 80°C / 12–16 h
Glass Transition Temp (Tg) IEC 61006 < –75 °C
Thermal Index IEC 216 150°C (tensile strength)
Thermal Conductivity DIN 52613 0.20 W/m·K
Hardness ISO 868 75 ± 5 Shore A
Tensile Strength DIN 53455 2 MPa
Dielectric Strength IEC 60250 33 kV/mm (dry, 23°C); 22.3 kV/mm (after water storage)
Volume Resistivity IEC 60455 2.2 × 10¹⁴ Ω·cm (23°C, wet); 1.6 × 10¹⁴ Ω·cm (53°C, wet)
Dielectric Constant (εr) IEC 60250 3.16 (50 Hz); 2.92 (1 kHz)
Dissipation Factor (tan δ) IEC 60250 ~0.025 (50 Hz – 1 MHz, dry)
Tracking Resistance IEC 60112 600 CTI
Water Absorption ISO 62 0.35 % (24h, RT)

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