Patent ID: 6204309
Filing Date: 2001-03-20
Classification: C08J,C08K,C09J,Y10T

Abstract:
A method for bonding substrates which comprises: applying to at least one of the substrates to be bonded a layer of an adhesive comprising at least one.alpha.-cyanoacrylate and a pyrylium salt of the formula: ##STR3##in which R.sub.1 to R.sub.5 represent independently hydrogen, an alkyl group containing 1-18 carbon atoms, an aryl group containing 1-18 carbon atoms and an aromatic group containing up to 18 carbon atoms fused at two vicinal positions, wherein R.sub.1 to R.sub.6 may be substituted with alkyl, aryl, alkoxy, aryloxy, halogen or pseudohalogen, and A comprises a non-nucleophilic counterion, joining the substrates and irradiating the adhesive with radiation of a wavelength which causes the adhesive to fluoresce wherein the irradiating is carried out before or after the substrates are joined.