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Araldite CW 1304 / Aradur HY 1300 – Filled epoxy casting system for room-temperature or slightly elevated curing of transformers, generators, motors, and metal/ceramic inserts

  • Item Name: Araldite® CW 1304 / Aradur® HY 1300

  • Manufacturer: Huntsman Advanced Materials

  • Technologies: Filled epoxy resin with polyamine hardener

  • Color: CW 1304 – Grey, HY 1300 – Clear yellowish liquid

  • Cure Type: Room-temperature or slightly elevated temperature curing (24h RT + 6h at 60°C)

  • Package Size: Contact to Techniq VN for details.

  • Shelf Life: Contact to Techniq VN for details.

1. Product Overview

Araldite® CW 1304 (epoxy resin) with Aradur® HY 1300 (polyamine hardener) is an optimally filled epoxy casting system designed for room temperature or slightly elevated temperature curing. The system offers a low coefficient of thermal expansion, good thermal endurance, and excellent crack resistance, making it suitable for electrical and mechanical encapsulation applications.


2. Applications

  • Casting and vacuum casting of inductive components

  • Encapsulation of transformers

  • Insulation for generators and motors

  • Encapsulation of metal and ceramic inserts

3. Typical Properties

Before Mixing

Component Appearance Viscosity (25 ℃) Density (g/cm³)
CW 1304 (Resin) Grey, high-viscosity mass 165 – 225 Pa·s 1.82 – 1.88
HY 1300 (Hardener) Clear, yellowish liquid 150 – 190 mPa·s 0.990 – 1.005

Mixing ratio:

  • By weight → CW 1304 : HY 1300 = 100 : 12.5

  • By volume → CW 1304 : HY 1300 = 100 : 23


Mixed System / Processing Data

Property Condition Value
Mix viscosity 25 ℃ 18,000 mPa·s
Mix viscosity 40 ℃ 6,000 mPa·s
Gel time 25 ℃ 70 min
Gel time 60 ℃ 22 min
Pot life 40 ℃ (to 15,000 mPa·s) 21 min
Standard cure cycle 24 h RT + 6 h at 60 ℃
Minimum cure cycle 48 h at 25 ℃ or 2 h at 60 ℃

Cured Properties (24 h RT + 6 h at 60 ℃)

Property Standard/Test Value
Glass transition temperature ISO 6721 77 ℃
Modulus in torsion G’ (RT) ISO 6721 3900 MPa
Thermal class IEC 60085 B
Tensile modulus ISO 527 9700 MPa
Tensile strength ISO 527 71 MPa
Elongation at break ISO 527 1 %
Flexural strength ISO 178 105 MPa
Thermal expansion coefficient (α₁) ISO 11359-2 35 ppm/K
Thermal expansion coefficient (α₂) ISO 11359-2 100 ppm/K
Thermal conductivity ISO 8894-1 0.64 W/m·K
Hardness DIN 53505 89 Shore D

Electrical Properties (24 h RT + 6 h at 60 ℃)

Property Standard/Test Value
Dielectric strength (2 mm) IEC 60243-1 15 kV/mm
Dielectric loss factor (tan δ, 50 Hz, 25 ℃) IEC 60250 1.2 %
Dielectric constant (εr, 50 Hz, 25 ℃) IEC 60250 4.8
Volume resistivity (ρ, 25 ℃) IEC 60093 1 × 10¹⁴ Ω·cm

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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