ARALDITE® CW 5725-5 / ARADUR® HY 5726-1

ARALDITE® CW 5725-5 / ARADUR® HY 5726-1 is a filled high-temperature epoxy casting system. It is a two-component filled casting resin system with excellent adhesion and impregnation properties designed for processing and curing at elevated temperatures.

RTU Product Type: Casting Resin

Product End Uses: Car Ignition Coils

Chemical Family: Epoxy & Epoxy Derivatives

Composites Processing Methods: Casting, Vacuum Casting

Features: Good Adhesion, Good Impregnation Capability, Good Sedimentation Properties, Improved Storage Stability, Low Viscosity, Thermal Shock Resistant

Enhanced TDS

Identification & Functionality

Features & Benefits

Ready-to-Use Product Features
Product Features
  • Very good thermal shock resistance
  • Very good thermal endurance
  • Low viscosity
  • Good storage stability
  • Very good impregnation properties
  • Very good adhesion to engineering plastics

Applications & Uses

Compatible Substrates & Surfaces
Composites Processing Methods
Product End Uses
Markets
Applications
System Preparation

Preparation
Araldite® CW 5725-5 Resin contains some fillers, which tend to settle over time. It is therefore recommended to carefully homogenize the container content before using. The material present in the production equipment storage tank should be stirred from time to time to prevent separation and inconsistent metering.

Mixing
To facilitate stirring and removal, highly-filled components are heated to 60-80°C in the original container (e.g. overnight in an oven).
To prepare the casting mix the resin component should be homogenized in holding tank A at 70 - 80°C under a vacuum of 1-5 mbar, the hardener component in holding tank B at 30 - 40°C and a vacuum of 1 - 5 mbar. A metering unit should be used to feed the resin and hardener components to an impeller mixer.

Applications
  • Car ignition coils
  • Casting / vacuum casting

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

Standard Cure Cycle

2.5 hours at 90°C + 2.5 hours at 130°C

Processing Guidelines

ARALDITE® CW 5725-5 / ARADUR® HY 5726-1 - Processing Guideline - 1

After curing, the components should be cooled down to min. 80°C along 1h in an unheated cabinet to exclude draughts and extremes of temperature.

Electrical Properties

Determined on standard test specimen at 23°C. Cured for 2.5h/90°C + 2.5h/130°C.

Dielectric strength (1 mm specimen)

IEC 60243-1

kV/mm

38

Dielectric loss factor (tan 50Hz, 25°C)

IEC 60250

%

1

Dielectric constant ([r 50Hz, 25°C)

IEC 60250

 

4.3

Volume resistivity (25°C)

IEC 60093

cm

1015

Tracking resistance CTI

IEC 60112

grade

> 600

Electrolytic corrosion

IEC 60426

grade

A-1

Mechanical & Physical Properties

Determined on standard test specimen at 23°C. Cured for 2.5h/90°C + 2.5h/130°C.

Color of casting

Visual

 

Black

Specific gravity

DIN 55990

g/cm3

1.73

Glass transition temperature

ISO 11357

°C

135 - 150

Thermal class

IEC 60085

 

H

Flexural modulus

ISO 178

MPa

7000

Flexural strength

ISO 178

MPa

85 - 150

Flexural elongation

ISO 178

MPa

1.35 - 2.50

Double torsion test

PM 216-0/89

MPa m-1/2

1.75 - 2.50

Double torsion test

PM 216-0/89

J/m2

475-700

Thermal linear coefficient

ISO 11359-2

ppm/K

35

Thermal conductivity

ISO 8894-1

W/mK

0.65

Hardness

DIN 53505

Shore D

90

Water absorption

ISO 62/80

 

 

10 days at 23°C
30 min at 100°C

ISO 62/80

% by wt.

0.08
0.05

Packaging & Availability

Packaging Information

Araldite® CW 5725-5 Resin and Aradur® HY 5726-1 Hardener are supplied in 2,850 and 2,400 pounds totes respectively.

Storage & Handling

Storage Conditions

When stored in a dry place in their original sealed containers at a temperature within 2°C and 40°C (35.6°F and 104°F), Araldite® CW 5725-5 Resin and Aradur® HY 5726-1 Hardener have a 12 months shelf-life from date of manufacture. The product should not be exposed to direct sunlight.

Other

Application Information
ValueUnitsTest Method / Conditions
Mix Ratio0.28 %(W)%(W)Hardener : Resin
Physical Properties
ValueUnitsTest Method / Conditions
Gel Time160.0-180.0 mmGELNORM Geltimer-TC at 80°C
Gel Time42.0-48.0 mmISO 9396 at 100°C
Viscosity465.0-475.0 mPa.smPa.sRotational Viscometer at 60°C
Viscosity265.0-275.0 mPa.smPa.sRotational Viscometer at 80°C