Henkel Ag & Company, Kgaa

Rory R Barnes

Brendan J Kneafsey

Barry N Burns

Mark Loane

Raymond P Tully

Nigel Sweeney

A redox curable composition, methods for manufacturing same and uses thereof are disclosed. The redox curable composition is useful as a pre-applied adhesive. The redox curable composition is solid at room temperature, may be heated for application to a substrate, and cools to form a dry-to-touch adhesive layer on said substrate, which may be activated when required by mating with another substrate and exposure to an anaerobic environment. The composition is particularly suited to manufacturing complex products, such as mobile phones, computers and circuits.

Redox curable compositions and methods of manufacture thereof

Curable cyanoacrylate compositions are reported that comprise cyanoacrylate and a thermoplastic polyurethane (TPU) components. Such compositions are toughened cyanoacrylate compositions exhibiting long term viscosity stability when stored for prolonged periods at room temperature (25&#xb0; C.). TPU components are reported having structural units in which at least one of the structural units has the formula &#x2014;O&#x2014;R&#x2014;O&#x2014;Ar&#x2014;O&#x2014;R&#x2014;O&#x2014;, wherein Ar is a C-Caromatic group with at least one aromatic ring; Ris a C-Calkyl group; and Ris a C-Calkyl group. The thermoplastic polyurethane (TPU) component may be present in the curable cyanoacrylate composition from about 1 wt % to about 40 wt %, for example from about 2 wt % to about 30 wt %, such from about 3 wt % to about 20 wt %, suitably from about 5 wt % to about 10 wt %, based on the total weight of the composition.

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Dublin, Ireland

Rory R Barnes