Curing Araldite adhesives

As adhesives they are very widely used both as cold setting and thermo curing. They can bond together a large variety of surfaces including metals. Araldite resins of this type are used widely in aircraft construction. They are also used for bonding concrete in dams and joining teflon film to stainless steel. They are used to encapsulate delineate electrical parts to protect them from shock and moisture. Such parts are used in components of rockets and satellites. 

Lucite positive relief structures. Epofix was selected as the chip substrate, among acrylic-polyester resin (Casolite) and epoxy resin (Araldite), because of its having the best mechanical properties and the least chemical interference needed for fabricating the MS chip [780]. In another report, PDMS was chosen over epoxy to fabricate MS chips because of its less chemical noises (interferents) in MS, and over polyurethane because of good adhesion properties. Even so, in the use of PDMS its curing (at 70°C) should be carried out for at least 72 h to further reduce the chemical noise [800]. 

High-r die- attach adhesive High-purity Bisphenol-A (Epiclon) and cycloaliphatic resins (Araldite, ERL) 15-24% Anhydride curing agents 12-24% Catalysts 1-2% Filler 50-70% Epi-bond 7002, Epi-bond 7200... 

Adhesive bonding in connections WmJ bt+bd and WmJ bd was with the toughened epoxy Araldite 2015 (Ciba Geigy, UK), a two-part cold-cure adhesive. 

A modified epoxy, foaming adhesive in sheet form which during the 120 C curing expands to fill gaps and adhere strongly to all parts of the typically honeycomb sandwich construction. Designed for use in conjunction with Araldite 312, 312/5 or 609, where the operating temperature can be between -55 C and +100 C. 

Paste adhesives are Araldite 1590-3 (Huntsman Advanced Materials), curing at ambient or moderate temperature. 

So it is not surprising to find the same adhesive being described as a RT curing two-part epoxy, as a metal bonding paste adhesive, Araldite 2015, or some other combination. Indeed it may well be that the standard titles do not convey or assist with the specific nature of the application in mind. Such a situation has the potential to make selection of the correct adhesive for the task in hand a potentially challenging activity. However, if the user follows a logical set of choice paths, then the task can be simplified considerably, O Pi. 16.1. Key factors to consider include ... 

Lapique and Redford (2002) used differential scanning calorimetry to measure rates of cure for the epoxide paste-adhesive Araldite 2014, finding E to be 34.6 kj mol . The equation also applies to other time-dependent processes such as diffusion and viscous flow. 

Araldite epoxy adhesive, cured 17 hat 40 °C lap joint 13 mm wide with 13 mm overlap. Totalbondarea 170 mnf substrate aluminum. Testing method tested shear at 20 mm/min. 

Epoxy adhesives such as Huntman s Araldite AW 134 with HY 994 hardener (cured for 15 min at 120°C) and Araldite AV 1566 GB (cured for 1 h at 230°C) give the best results with this engineering resin. Other adhesives that can be used are cyanoacrylate (Loctite 414 with AC primer), anaerobics (Loctite 638 with N primer), and silicone sealant (Loctite Superflex). The highest lap-shear strength was obtained with Araldite AW 134. This adhesive has balanced properties, good resistance to mechanical shock, thermal resistance to 100°C, and reasonable stability in the presence of aliphatic and aromatic solvents. Some solvents, particularly chlorinated hydrocarbons, will cause deterioration of the bond [30]. 

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