ARALDITE® LY 1556 / ARADUR® 917-1 / ACCELERATOR 960-1

• Anhydride-cured, low-viscosity standard matrix system with extremely long pot life.
• The reactivity of the system is adjustable by variation of the accelerater content.
• The system is easy to process, has good fibre impregnation properties and exhibits excellent mechanical, dynamic and thermal properties.

• To simplify the mixing process the resin can be preheated to about 30 °C to 50 °C before adding the cold hardener. Hardener and accelerator can be premixed, thus allowing the use of two component mixing/metering equipment. The mix of hardener and accelerator has a shelf life of several days.
• The processing of the system at elevated temperatures of 30 °C to 40 °C shows the best results. The gelation temperature should not be higher than absolutely necessary. A high gelation temperature induces high shrinkage and generates internal stresses.

• Filament Winding
• Pultrusion
• Pressure Moulding

• Gelation either - 2 - 4 h at 176 °F / 1 - 3 h at 194 °F
• Post-cure either - 4 - 8 h at 248 °F / 2 - 8 h at 284 °F / 2 - 8 h at 320 °F

• 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. 

Unless otherwise stated, the figures given are for pressed laminate samples comprising 12 layers (3.1 - 3.25 mm) of E-glass fabric UD, 425 g/m2 , fibre volume content 61 - 64 %. 

Note

• Short beam: E-glass unidirectional specimen
• Laminate thickness t = 3.1 - 3.25 mm
• Fibre volume content: 61 - 64 % 

The values below were obtained with a formulation using 3 pbw Accelerator AC 960-1 Unless otherwise stated, the processing schedule for the samples tested was gelation for 4 hours at 80 °C and post-cured for 4 hours at 140 °C. 

• 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.

• Provided that Resin LY 1556, Aradur® 917-1 and Accelerator 960-1 are stored in a dry place in their original, properly closed containers at the storage temperature mentioned in the MSDS they will have the shelf lives indicated on the labels.
• Partly emptied containers should be closed immediately after use. Because Aradur 917 is sensitive to moisture, storage containers should be ventilated with dry air only.
• Araldite® LY 1556 which has crystallized and looks cloudy can be restored to its original state by heating to 60 - 80 °C.