Two-Part Cyanoacrylates
Two-Part Cyanoacrylates are one of the newest breakthrough innovations in the cyanoacrylate adhesive industry. Two-part CAs are two-component, extremely quick fixturing, room-temperature curing adhesives which provide excellent adhesion to a wide variety of substrates. Due to the dual component nature of two-part CAs, these adhesives are slightly more difficult to automate and integrate into production lines then standard CAs. Currently, two-part CAs only are available as gels. Two-part CAs have excellent resistance to moisture and non-polar chemicals.
Two-part CA adhesive systems only are available in dual cartridges with a single-use mix nozzle. One side of the cartridge contains the cyanoacrylate monomer resin and the other side of the cartridge contains a proprietary catalyst which promotes the cure of the adhesive system. Like the epoxies adhesive systems, two-part CAs do exotherm during cure.
Since they are not limited to a moisture cure system, two-part CAs have wide gap filling and curing capabilities, unlike traditional one-part CA adhesives. Two-part CAs have a more rapid speed of cure then one-part CAs and provide enhanced bonding performance on acidic surfaces and in low-humidity curing environments. Two-part CAs also provide high bond strengths on most plastics. Like one-part CAs, in destructive assembly testing often the plastic material fails before the adhesive.