ARALDITE® LY 556 / ARADUR® 22962

ARALDITE® LY 556 / ARADUR® 22962 is a low-viscosity epoxy resin, a hardener mixture of polyamines.

 

The information, specifications, and materials provided with this product are for general informational purposes only and are subject to change without notice. The product is provided “as is” without any warranties, express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement. Users are responsible for ensuring the product is suitable for their intended application and for following all applicable safety guidelines and instructions.

The information, specifications, and materials accessible here may not reflect the most current version. Please use the Request a Document feature for the most current product documentation available.

RTU Product Type: Laminating Resin System

Product End Uses: Composites, Industrial Composites, Structural Composites

Chemical Family: Epoxy & Epoxy Derivatives

Composites Processing Methods: Filament Winding, Pressure Molding, Resin Transfer Molding (RTM), Wet Lay-Up

Features: Excellent Flexibility, High Reactivity

Cure Method: Chemical Cure, Heat Cure

Enhanced TDS

Identification & Functionality

Features & Benefits

Labeling Claims
Ready-to-Use Product Features
Product Features

Amine-Cured laminating system without reactive diluent showing excellent flexibility and high reactivity.

Applications & Uses

Composites Processing Methods
Cure Method
Product End Uses
Product Processing Instructions
  • Wet lay-up
  • Resin Transfer Molding (RTM)
  • Pressure Mouding
  • Filament Winding
Mixing Ratio

We recommend that the components are weighed with an accurate balance to prevent mixing inaccuracies which can affect the properties of the matrix system. The components should be mixed thoroughly to ensure homogeneity. It is important that the side and the bottom of the vessel are incorporated into the mixing process. When processing large quantities of mixture the pot life will decrease due to exothermic reaction. It is advisable to divide large mixes into several smaller containers.

Properties

Notes

Gel Time : The values shown are for small amounts of pure resin/hardener mix. In composite structures the gel time can differ significantly from the given values depending on the fibre content and the laminate thickness.

Processing Properties :

Typical Cure Cycles
2 h 80 °C + 2 h 150 °C
15 min 120 °C + 120 min 150 °C

The optimum Cure Cycle has to be determined case by case, depending on the processing and the economic requirements.

Regulatory & Compliance

Quality Standards

Technical Details & Test Data

Properties of The Cured, Neat Formulation

ISO 11357-2, DSC, 10 K/MIN

Cure Condition Glass Transition Temperature [°C]
2 h 80°C 95 - 105
4 h 80 °C 100 - 110
2 h 100 °C 112 - 122
15 min 120 °C 123 - 135
2 h 120 °C 125 - 138
15 min 120 °C + 2 h 140 °C 138 - 148
15 min 120 °C + 2 h 150 °C 148 - 158
15 min 120 °C + 1 h 160 °C 150 - 160
15 min 120 °C + 2 h 160 °C 153 - 163

Tensile Test (ISO 527)

Cure: 15 min 120 °C + 2 h 150 °C

Property Unit Value
Tensile strength MPa 62 - 72
Elongation at tensile strength % 3.0 - 4.0
Ultimate strength MPa 62 - 72
Ultimate elongation % 3.0 - 4.0
Tensile modulus MPa 2750 - 3000

Flexural Test (ISO 178)

Cure: 15 min 120 °C + 2 h 150 °C

Property Unit Value
Flexural strength MPa 130 - 136
Elongation at flexural strength % 7 - 9.5
Ultimate strength MPa 127 - 135
Ultimate elongation % 7.5 - 10.0
Flexural modulus MPa 2550 - 2800

Fracture Properties – Bend Notch Test (ISO 13586)

Cure: 15 min 120 °C + 2 h 150 °C

Property Unit Value
Fracture toughness K₁c MPa√m 0.68 - 0.78
Fracture energy G₁c J/m² 140 - 175

Water Absorption (ISO 62)

Cure: 15 min 120 °C + 2 h 150 °C

Immersion Time Unit Value
1 day H₂O at 23°C % 0.13 - 0.17
10 days H₂O at 23°C % 0.50 - 0.55
Properties of The Cured, Reinforced Formulation

Flexural Test (ISO 178)

Samples: 12 layers E-glass fabrics UD (425 g/m²)
Laminate thickness: 3.1 - 3.25 mm
Fibre volume content: 58 - 62%
Cure: 15 min 120 °C + 2 h 150 °C

Property

Unit

Value

Flexural strength MPa 1000 - 1200
Elongation at flexural strength % 2.6 - 2.8
Ultimate strength MPa 1000 - 1200
Ultimate elongation % 2.6 - 2.8
Flexural modulus MPa 38000 - 42000

Interlaminar Shear Strength (ASTM D 2344)

Samples: 12 layers E-glass fabrics UD (425 g/m²)
Laminate thickness: 3.1 - 3.25 mm
Fibre volume content: 59 - 63%
Cure: 15 min 120 °C + 2 h 150 °C

Property

Unit

Value

Shear strength MPa 58 - 62

Safety & Health

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 solvents
Disposal of spillage Soak up with sawdust or cotton waste and deposit in
plastic-lined bin
Ventilation of workshop Renew air 3 to 5 times an hour
Ventilation of workplaces Exhaust fans. Operatives should avoid inhaling
vapours

First 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
  • Provided that ARALDITE® LY 556 or ARADUR® 22962 are stored in a dry place in their original, properly closed containers at the storage temperatures they will have the shelf lives indicated on the labels.
  • Partly emptied containers should be closed immediately after use.
  • ARADUR® 22962 can crystallize at low temperature and adverse conditions. This crystallization effect is reversible if the material is heated up above 30 - 40 °C for a certain time.
  • There is no change in chemical composition or suitability as hardener for epoxy resins.

Other

Application Information
ValueUnitsTest Method / Conditions
Mix Ratio0.23%(W)Hardener : Resin