Enhanced TDS
Identification & Functionality
- Chemical Family
- RTU Product Type
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Ready-to-Use Product Features
Applications & Uses
- Composites Processing Methods
- Cure Method
- Product End Uses
- Markets
- Applications
- Processing Methods
Vacuum Pressure Impregnation (VPI - process)
- Application Information
Large coils for magnets and/or rotating machines
Properties
- Physical Form
- Product Data
ARALDITE® MY 740 Liquid, unmodified, solvent-free Bisphenol A epoxy resin
Property Value Unit Test Method Condition Viscosity 10,000 - 14,500 mPa s ISO 12058 at 25°C Epoxy content 5.25 - 5.55 equiv/kg ISO 3001 Density 1.15 - 1.20 g/cm³ ISO 1675 at 25°C Flash point 200 °C ISO 1523 Vapour pressure < 10⁻⁴ mbar Knudsen at 20°C Vapour pressure < 5·10⁻³ mbar Knudsen at 60°C ARADUR® HY 906 Liquid, dicarboxylic Anhydride
Property Value Unit Test Method Condition Viscosity 175 - 350 mPa s ISO 12058 at 25°C Density 1.20 - 1.25 g/cm³ ISO 1675 at 20°C Flash point 135 - 167 °C ISO 1523 Vapour pressure < 0.2 mbar Knudsen at 50°C ACCELERATOR DY 073-1 Liquid, modified Amine Complex
Property Value Unit Test Method Condition Viscosity 5 - 15 mPa s ISO 12058 at 25°C Density 0.95 - 1.00 g/cm³ ISO 1675 at 25°C Flash point 80 °C ISO 1523 - Vapour pressure < 0.06 mbar Knudsen at 20°C Flexibiliser DY 040 Low viscous, solvent-free Polyglycol
Property Value Unit Test Method Condition Viscosity 60 - 90 mPa s ISO 12058 at 25°C Density 0.95 - 1.05 g/cm³ ISO 1675 at 25°C Refraction 1.4450 - 1.4464 -- DIN 53491 at 25°C Flash point > 100 °C ISO 1523 Vapour pressure < 3·10⁻⁴ Pa Knudsen at 20°C
Technical Details & Test Data
- Product Properties
- High mechanical and electrical properties at elevated temperature
- High thermal shock resistance
- Excellent radiation resistance
- Viscosity Increase
Fig.3.1 Initial viscosity as a function of temperature (measurements with Rheomat 115A MS DIN 125, D =10 s-1)
Fig.3.2: Viscosity increase at 60°C as a function of the time measured with Rheomat 115A MS DIN 125, shear rate D=10s-1)
- Gelation / Cure Time
Fig.3.4 Geltime measured with infunction of temperature (measurements with Gelnorm Instrument / ISO 9396)
- Electrical Properties
Determined on standard test specimen at 23°C
Cured for 8h at 100°CKey Value Unit Test Mehod Condition Loss factor tan δ (> 1%) 38 °C IEC 60250 Loss factor tan δ (> 5%) 56 °C IEC 60250 Dielectric constant (25°C) 3.4 IEC 60250 at 25°C Volume resistivity (25°C) 5.2·10¹⁵ ohm·cm IEC 60093 at 25°C Dielectric strength (25°C) 26 kV/mm IEC 60243-1 at 25°C Tracking resistance > 600-0.2 CTI IEC 60112 Tracking resistance (Test Solution A) > 600M-1.2 CTI IEC 60112 Electrolytic corrosion A-1 grade IEC 60426 
Fig.4.1: Loss factor (tan δ) and dielectric constant (εr) as a function of temperature (measurement frequency: 50 Hz IEC 60250)
Fig.6.2: Volume resistivity (ρ) as a function of temperature (measurement voltage: 1000 V / IEC 60093)
- Mechanical Properties
Curing Cycle: 6h at 100°C + 12h at 135°C
Key Value Unite Test Method Condition Flexural strength 130 - 140 MPa ISO 178 Surface strain 5.1 - 5.7 % ISO 178 Impact strength 14 - 17 kJ/m² ISO 179 Glass Transition Temperature 130 - 140 °C ISO 11357-2 Water Absorption (60 min at 100°C) 0.15 - 0.20 % by wt. ISO 62 at 100°C Water Absorption (600 min at 100°C) 0.55 - 0.65 % by wt. ISO 62 at 100°C Water Absorption (100 h at 100°C) 1.15 - 1.20 % by wt. ISO 62 at 100°C Curing Cycle: 6h at 100°C + 12h at 135°C + 3h at 160°C
Key Value Unite Test Method Condition Flexural strength 125 - 135 MPa ISO 178 Surface strain 4.4 - 5.0 % ISO 178 Impact strength 15 - 18 kJ/m² ISO 179 Glass Transition Temperature 140 - 145 °C ISO 11357-2 Water Absorption (60 min at 100°C) 0.15 - 0.20 % by wt. ISO 62 at 100°C Water Absorption (600 min at 100°C) 0.55 - 0.65 % by wt. ISO 62 at 100°C Water Absorption (100 h at 100°C) 1.0 - 1.1 % by wt. ISO 62 at 100°C Glass Transition Temperature 125 - 130 °C ISO 11357-2
Safety & Health
- Industrial Hygiene
Mandatory and recommended industrial hygiene procedures should be followed when- ever our products are being handled and processed.
- Handling Precautions
Personal hygiene Safety precautions at workplace protective clothing overalls gloves essential arm protectors recommended when skin contact likely goggles/safety glasses yes Skin protection before starting work Apply barrier cream to exposed skin after washing Apply barrier or nourishing cream Cleansing of contaminated skin Dab off with absorbent paper, wash with warm water
and alkali-free soap, then dry with disposable towels.
Do not use solventsDisposal of spillage Soak up with sawdust or cotton waste and deposit in
plastic-lined binVentilation of workshop Renew air 3 to 5 times an hour Ventilation of workplaces Exhaust fans. Operatives should avoid inhaling
vapoursFirst Aid : Contamination of the eyes by resin, hardener or mix should be treated immediately by flushing with clean, running water for 10 to 15 minutes. A doctor should then be consulted. Material smeared or splashed on the skin should be dabbed off, and the contaminated area then washed and treated with a cleansing cream (see above). A doctor should be consulted in the event of severe irritation or burns. Contaminated clothing should be changed immediately. Anyone taken ill after inhaling vapours should be moved out of doors immediately. In all cases of doubt call for medical assistance.
Storage & Handling
- Storage Conditions
Store the components at 18-25°C, in tightly sealed and dry original containers. Under these conditions, the shelf life will correspond to the expiry date stated on the label. Product specific advise regarding storage can be found on product label. After this date, the product may be processed only following reanalysis. Partly emptied containers should be closed tightly immediately after use.