Cyanoacrylates: Towards High Temperature Resistant Instant Adhesives. A Critical Review

Thermal Treatment of a Commercial Polycyanoacrylate Adhesive Addressed for Instant Glass Restoration, for Investigating Its Ageing Tolerance

“…In that way, they increase heat resistance of the studied polymers, which seem to connect with a cross-linked formation in the adhesive layer. The decrease in endurance also accelerates when the adhesive is stored at high temperatures [25]. We have observed physical changes for thermally treated samples at 50 • C and even more at 75 • C, whereas the observations for the photooxidized glue are analogous (Figure 1).…”

“…Baric et al removed a polycyanoacrylate restoration by applying acetone too, even though ageing may make polycyanoacrylates less dissoluble (in DMF for example) [36]. As for HCHO, it led to the dullness of the solution when Loctite ® was added (Table 1); it should be mentioned that HCHO traces exist already in the production of ethyl 2-cyanoacrylate in the reaction stages [25,37].…”

“…It is well-known that epoxy resins present the highest endurance to most corrosive environments, retarding even yellowness [24]. The relatively short duration of resistance of polycyanoacrylate glues is usually due to higher temperatures, moisture presence, solvents or aqueous basic solutions [25]. Its restricted performance is attributed to the degradation of the polymer when exposed to the above.…”