ARALDITE® CY 5825 / ARADUR® HY 5825

ARALDITE® CY 5825 / ARADUR® HY 5825 is a heat-curing, two-component material designed for high-temperature applications. ARALDITE® CY 5825 is a multifunctional (high functionality) epoxy-based material, and ARADUR® HY 5825 is a pre-accelerated anhydride. This system was specially developed for high-temperature electrical insulation applications. Due to higher functionality, its gamma radiation resistance is superior to that of standard Bisphenol-A-based epoxy systems. This system can be used for many applications, such as high-temperature slot insulation for alternators, impregnation of transformer coils, and electrical high-temperature filament-wound products.

RTU Product Type: 2K (2 component) Liquid Insulation System, Impregnating Resin System

Product End Uses: Dry Type Distribution Transformers, Electrical Insulator, Electronic Insulation, Filament Wound Products, Slot Insulation, Transformer Coils, Transformers

Chemical Family: Epoxy & Epoxy Derivatives

Composites Processing Methods: Vacuum Casting

Features: Dimensional Stability, Excellent High Temperature Properties, Good Electrical Properties, Good Mechanical Properties, High Glass Transition Temperature, High Temperature Curing, Long Working Life, Radiation Resistance

Enhanced TDS

Identification & Functionality

Features & Benefits

Ready-to-Use Product Features
Features and Benefits
  • Heat curing, two component liquid insulation system with low viscosity
  • Long working life at processing temperatures
  • Very high glass transition temperature (230°C - 240°C)
  • Good dimensional stability
  • Very good mechanical properties
  • Excellent electrical properties

Applications & Uses

Properties

Physical Form

Technical Details & Test Data

Physical & Electrical Properties

Physical Properties

Property ASTM Test Method Test Value
Tensile strength, psi ASTM D-638 7,000 – 9,000
Tensile modulus, psi ASTM D-638

500,000 – 550,000

Tensile elongation, % ASTM D-638 1.0 – 1.5
Flexural strength, psi ASTM D-790 18,000 – 20,000
Flexural modulus, psi ASTM D-790

500,000 – 550,000

Hardness, Shore D ASTM D-2240 92 – 96
Glass transition temperature, °C ASTM E-381 230-240
Coeff. thermal expansion, in/in-°C ASTM E-381 55 – 60 x 10⁻⁶
Water absorption, 23°C/24 hours, % ASTM D-570 0.02 – 0.03
Thermal Conductivity, W/m-K ASTM F-433 0.20 – 0.23

 

Electrical Properties

Property IEC Test Method Condition Test Value
Dielectric Constant, 60 Hz IEC 60250 at 25°C 4.9
Dielectric Constant, 60 Hz IEC 60250 at 50°C 5
Dielectric Constant, 60 Hz IEC 60250 at 100°C 5
Dielectric Constant, 60 Hz IEC 60250 at 150°C 5
Dielectric Constant, 60 Hz IEC 60250 at 200°C 5.2
Dielectric Constant, 60 Hz IEC 60250 at 220°C 5.3
Dissipation Factor, 60 Hz IEC 60250 at 25°C 0.004
Dissipation Factor, 60 Hz IEC 60250 at 50°C 0.005
Dissipation Factor, 60 Hz IEC 60250 at 100°C 0.005
Dissipation Factor, 60 Hz IEC 60250 at 150°C 0.01
Dissipation Factor, 60 Hz IEC 60250 at 200°C 0.037
Volume Resistivity IEC 6093 at 25°C 3.8 x 10¹⁵
Volume Resistivity IEC 6093 at 50°C 3.2 x 10¹⁵
Volume Resistivity IEC 6093 at 100°C 1.7 x 10¹⁴
Volume Resistivity IEC 6093 at 150°C 9.1 x 10¹²
Volume Resistivity IEC 6093 at 200°C 5.0 x 10¹¹
Volume Resistivity IEC 6093 at 220°C 2.1 x 10¹¹
Dielectric Strength IEC 60243-1 V/mil at 3 mm 650 - 750
Cure Cycle
Cure at

150°C for 1 hour followed by immediate post-curing

Post cure

2 hours at 200°C + 2 hours at 220°C + 4 hours at 250°C

Storage & Handling

Handling Information
  • Araldite® CY 5825 US epoxy resin - If only part of container is used, re-close to prevent contamination.
     
  • Aradur® HY 5825 US This product is sensitive to moisture sensitive and packaged under a blanket of dry nitrogen. Maintain factory seal. If only part of container is used, blanket with dry nitrogen and tightly re-seal.
Storage Conditions

ARALDITE® CY 5825 / ARADUR® HY 5825 should be stored in a dry place, in the sealed original container, at temperatures between 2°C and 40°C (35.6°F and 104°F). Under these storage conditions the shelf life is 1 year. The product should not be exposed to direct sunlight.

Other

Application Information
ValueUnitsTest Method / Conditions
Mix Ratio1.2 %(W)%(W)Hardener : Resin
Physical Properties
ValueUnitsTest Method / Conditions
Specific Gravity1.18-1.2-
Viscosity3500.0-4200.0 cPscPsat 25°C, Spindle 21, 50 rpm
Viscosity600.0-700.0 cPscPsat 40°C, Spindle 21, 50 rpm
Viscosity200.0-300.0 cPscPsat 50°C, Spindle 21, 50 rpm
Viscosity120.0-180.0 cPscPsat 60°C, Spindle 21, 50 rpm
Viscosity60.0-100.0 cPscPsat 70°C, Spindle 21, 50 rpm