Araldite CW 5725 Resin and Hardener Aradur HY 5726 are two components of epoxy potting compound for car ignition coils which would have to resist to shock and bear a lot of heat during the process of transforming the battery’s low voltage to the thousands of volts needed to create an electric spark in the spark plugs to ignite the fuel.
FEATURES:
Impregnation of fine wire windings (30μm)
High operating temperature 150-180°C / >1000 hrs
Good resistance to Thermal Shock / Thermal mismatch (-40° / +140°C)
Crack resistance
Adhesion to thermoplastic housing /bobbin
Compatibility with integrated PCB
Dielectric Strength, Dielectric constant
Manufacturing process: Vacuum Potting
Short Cycle times (10´000 parts per day and equipment)
Fast filling (gaps 1 mm)
Short curing (current 4 – 6hrs, future 0.5 – 2hrs)
APPLICATIONS:
Car ignition coils
Vacuum casting
ARALDITE CW 5725
Viscosity
at 60°C
ISO 12058
mPa s
6300
Specific gravity
at 25°C
DIN 53 217
g/cm³
1.91
Flash point
DIN 1523
°C
>200
Filler content
%
65
As supplied form
black, highly viscous liquid
Hazardous decomposition products
Hazardous decomposition products Carbon monoxide, carbon dioxide and other toxic gases and vapour if burned
Disposal
Regular procedures approved by national and/or local authorities
Hardener HY 2919
Viscosity
at 25°C
ISO 12058
mPa s
70
Specific gravity
at 25°C
DIN 53 217
g/cm³
1.19
Flash point
ISO 1523
°C
160
As supplied form
clear, yellowish liquid
Hazardous decomposition products
Carbon monoxide, carbon dioxide and other toxic gases and vapours if burned
Disposal
Regular procedures approved by national and/or local authorities
