Curing solder replacement adhesives

The reliability of several silver-filled epoxies as solder replacements has been studied and reported by several investigators.In one study, adhesives formulated with an epoxy resin (Epon 862 ) and cured with... 

With improved formulations, organic-based conductive adhesives became feasible replacements for eutectic solders. Table 4 shows typical one- and two-part conductive adhesives from the 1970s. The one-part adhesive system employed a latent catalyst for long pot life but required a high-temperature cure cycle. The two-part system, formulated... 

Ink distributors A world leader in office machinery has recently adopted the use of an Anaerobic adhesive in the manufacture of ink distributors. After an extensive study, it was found that this adhesive could save 15,000 per year in manufacturing cost by replacing solder on four joints to join shaft ends to a distributor tube. In two further joints, a slow-setting sealant has also been replaced by the fast-curing anaerobic material. 

As pointed out in Section 1.1, most anaerobic compositions are not true adhesives and, although very stable, they are not currently as robust or durable as the heat-cured, toughened, single-part epoxies. These epoxies are therefore used to replace solder on brass components when only a few threads are available for engagement. The softness of the alloy coupled with the low engagement area militate against anaerobics, especially when it is intended to use these at high temperatures. 

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