Assembly of timepiece parts assembled using repositionable hot melt adhesive and process for assembling and repositioning such parts

Abstract

An assembly of timepiece parts assembled together with an adhesive at a temperature Tand to be repositioned when the adhesive is at a temperature T. The adhesive includes a formulation, which at Tincludes a mixture of polymer chains with pendant diene units X and coupling molecules including two dienophile end groups Y, wherein the X units and the Y groups are arranged to react with one another and to bond together with the Diels-Alder reaction at a temperature Tand to regenerate with the retro-Diels-Alder reaction at a temperature T, at Tforms a three-dimensional network, in which the polymer chains are linked to one another by the coupling molecules with the Diels-Alder reaction, where T<T≤T, where temperature Tranges between 0° C. and 100° C. and temperature Tranges between 50° C. and 200° C., and Tis strictly lower than T. A process for assembling and repositioning two timepiece parts with a repositionable hot melt adhesive to enable the timepiece parts to be repositioned when the adhesive is heated.