Henkel Kommanditgesellschaft Auf Aktien

Dagmar Behn

Hanns R Misiak

Werner Gruber

Heinz C Nicolaisen

Yuri Gololobov

Hanns-Roland Misiak

Annette Schroeter

The problem addressed by the invention was to find an anionic polymerization inhibitor for cyanoacrylate adhesives containing one or more cyanoacrylates, stabilizers against anionic and radical polymerization and auxiliaries typically used in such adhesive systems which, besides a reliable inhibiting effect, would counteract any increase in the setting time after storage. This problem was solved by using 2-oxo-1,3,2-dioxathiolanes as inhibitors.

Stabilized cyanoacrylate adhesives

Cyanoacrylate adhesive containing a pyrylium salt as a fluorescent dye are useful for bonding various substrates, particularly transparent plastics. The pyrylium salt may be present in relatively large quantities in the adhesive without any adverse effect on the storage stability and adhesive properties, yet shows very little inherent coloration in visible light.

Fluorescent cyanoacrylate adhesive

Cyanoacrylate adhesives which have increased heat resistance, yet also exhibit good storage stability and acceptable cure times, are obtained by using 2-cyanopentadienoic acid esters in combination with alkylene bis-(2-cyanopentadienoates).

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Hannover, Germany

Dagmar Behn