A cyanoacrylate composition with thermoplastic polyurethane, formulated as a non-flowable soft solid or semi solid mass, for example in stick form, is reported.

Two-part cyanoacrylate/free radical curable adhesive systems are provided.

Two-part cyanoacrylate/free radically curable adhesive systems demonstrating improved toughness are provided.

Two-part cyanoacrylate/free radically curable adhesive systems demonstrating improved toughness are provided.

In an aspect, a curable composition comprises an acid catalyzed urethane (meth)acrylate oligomer comprising an acid catalyst; a cyanoacrylate monomer; a metallocene compound; a free radical polymerization inhibitor; and an acidic anionic polymerization inhibitor. In yet another aspect, a method of making a cured composition comprises forming the curable composition; and curing the curable composition by exposing it to light to form the cured composition.

In an aspect, a curable composition comprises an acid catalyzed urethane (meth)acrylate oligomer comprising an acid catalyst; a cyanoacrylate monomer; a metallocene compound; a free radical polymerization inhibitor; and an acidic anionic polymerization inhibitor. In yet another aspect, a method of making a cured composition comprises forming the curable composition; and curing the curable composition by exposing it to light to form the cured composition.

Two-part cyanoacrylate/cationically curable adhesive systems are provided.

Two-part cyanoacrylate/cationically curable adhesive systems are provided.

Cyanoacrylate compositions that include a cyanoacrylate component, a rubber toughening component, a component containing at least two (meth)acrylate functional groups and an anhydride component are provided.

Two-part cyanoacrylate/cationically curable adhesive systems are provided.