Loctite (r&d) Limited

Gerard R McCann

Hanns Misiak

James Houlihan

Bernard Ryan

An activator composition for the accelerated hardening of cyanoacrylate adhesives, wherein the activator comprises a member selected from the group consisting of: aromatic heterocyclic compounds having at least one N hetero atom in the ring(s) such as pyridines, quinolines and pyrimidines and substituted on the ring(s) with at least one electron-withdrawing group which decreases the base strength of the substituted compound compared to the corresponding unsubstituted compound, mixtures of any of the foregoing with each other, and/or with N,N-dimethyl-p-toluidine, and mixtures of any of the foregoing and/or N,N-dimethyl-p-toluidine with an organic compound containing the structural element, &#x2014;N&#x2550;C&#x2014;S&#x2014;S&#x2014;, such as dibenzothiazyl disulfide. 6,6'dithiodinicotinic acid, 2,2&#x2032;-dipyridyl disulfide, and bis(4-t-butyl-1-isopropyl-2-imidazolyl)disulfide. An activator composition may comprise a solution of one or more activators in a solvent mixture which comprises a volatile hydrocarbon and a cyclic ketone.

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Dublin, Ireland

Gerard R McCann