ARALDITE® MY 757 / ARALDITE® CY 223 / HARDENER HY 842 / HARDENER HY 956 / HARDENER HY 1473

ARALDITE® MY 757 / ARALDITE® CY 223 / HARDENER HY 842 / HARDENER HY 956 / HARDENER HY 1473 is a casting system for processing and curing at room temperature or slightly higher temperatures. Low initial viscosity. High filler addition possibility. It is used in encapsulating or potting low voltage and electronic components.

RTU Product Type: Casting Resin

Product End Uses: Electronic Components, Filters, Switch Gears

Chemical Family: Epoxy & Epoxy Derivatives

Composites Processing Methods: Casting, Encapsulation, Potting

Features: Good Mechanical Resistance, Low Viscosity, Room Temperature Curing

Safety Data SheetTechnical Data Sheet
  • TypeDocument Name
View All Documents

Enhanced TDS

Identification & Functionality

Chemical Family
Epoxy & Epoxy Derivatives
RTU Product Type
Casting Resin
Technologies
Composite Materials
Product Families
Composite Materials — Resin Systems
Casting

Features & Benefits

Ready-to-Use Product Features
Good Mechanical Resistance,
Low Viscosity,
Room Temperature Curing
Product Features
  • Good mechanical resistance
  • Good resistance to atmospheric and chemical degradation

Applications & Uses

Composites Processing Methods
Casting,
Encapsulation,
Potting
Product End Uses
Electronic Components,
Filters,
Switch Gears

Properties

Physical Form
Liquid

Regulatory & Compliance

Certifications & Compliance
ISO 9000

Technical Details & Test Data

Properties
System 1 2 3 4
Shore D hardness (4 mm plate) 25°C DIN 53 505 65 75 69 78
Glass transition temperature (DSC, Mettler TA 4 000) DIN 51005 °C 40 50 46 57
Tensile strength Max. tensile stress 25°C ISO/R 527 MPa 37 90 39 75
Tensile strength elongation at break 25°C ISO/R 527 % 4 4 3 3
Elastic modulus from tensile test 25°C ISO/R 527 MPa 1440 2988 2118 3230
Water absorption          
10 days 23°C ISO 62 % 0.69 0.31 0.47 0.51
30 min 100°C ISO 62 % 0.30 0.19 0.34 0.34
Dielectric constant εr 23°C DIN 53 483 3.3 3.6 3.4 3.5
(50 Hz) 60°C 7.2 3.9 6.2 3.8
(80 Hz) 80°C 9.2 5.8 7.9 5.1
Dissipation factor tan δ 23°C DIN 53 483 % 2.2 0.4 1.1 0.4
(50 Hz) 60°C 19.6 0.9 14.7 0.8
(50 Hz) 80°C – 12.7 – 9.4
Volume resistivity ρ 23°C DIN 53482 Ω⋅cm 7x1014 2x1016 2x1015 1x1016
  60°C 5x1010 6x1013 2x1011 1x1014
  80°C 2x109 1x1011 9x108 4x1011
Electrolytic corrosion DIN 53 489 grade A-1 A-1 A-1 A-1
Tracking resistance IEC 112 CTI >600 CTI >600 CTI >600 CTI >600
    -0.2 -0.1 -0.2 -0.2
Electric strength          
20 s for 1 mm plate (50 Hz) 23°C IEC 243 kV/mm 28 30 27 29

 

Note: Guideline values determined on standard test specimens cured for 24 h/25°C + 6 /60°C

Processing Information
  System
  1 2 3 4
Mix ratio ARALDITE® MY 757 parts by weight 100 100 100 –
  ARALDITE® CY 223 parts by weight – – – 100
  HARDENER HY 842 parts by weight 55 – – –
  HARDENER HY 956 parts by weight – 25 – 30
  HARDENER HY 1473 parts by weight – – 40 –

 

Processing data (Guideline values)

System 1 2 3 4
Initial viscosity (Hoeppler)          
at 25℃ mPa s 497 600 647 595
at 40℃ mPa s 209 186 243 190
Pot life (Hoeppler)          
to 1500 mPa s at 40℃ min 59 32 35 31
to 15 000 mPa s at 25℃ min 195 94 115 90
Minimum curing time          
at 25℃ h 24-36 24 24 24
at 40℃ h 10-12 6-10 6-10 6-10
at 60℃ h 4-6 2-3 2-3 2-3

Safety & Health

Safety Information

First Aid

  • Contamination of the eyesby resin, hardener or casting 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 in a dry place at 18-25°C, in tightly sealed original containers.
  • Under these conditions, the shelf life will correspond to the expiry date stated on the label.
  • After this date, the product may be processed only after reanalysis.
  • Partly emptied containers should be tightly closed immediately after use.
  • For information on waste disposal and hazardous products of decomposition in the event of a fire, refer to the Material Safety Data Sheets (MSDS) for these particular products.
Handling Information
Safety Precautions
Protective clothing Yes
Gloves Essential
Arm protectors

Recommended when skin contact likely
Goggles/safety glasses Yes
Respirator/dust mask Recommended
Skin Protection
Skin protection before starting

Apply barrier cream to exposed skin
Skin protection 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 solvents
Clean shop requirements

Cover workbenches, etc. with light coloured paper. Use disposable breakers, etc.
Disposal of spillage

Soak up with sawdust or cotton waste and deposit in plastic-lined bin
Ventilation
Ventilation of workshop

Renew air 3 to 5 times an hour
Ventilation of workplace

Exhaust fans. Operatives should avoid inhaling vapours.