Abstract: Silane-terminated prepolymers which contain, on at least one silicon atom, at least one hydrolyzable aryloxy type functional group. The use of these prepolymers, containing silyl-aryloxy terminated groups, in adhesive sealant formulations increases their reactivity so enabling the use of metal-based catalysts, which are in most cases toxic and act as oxidation catalysts, to be avoided or their quantity to be reduced compared with the standard quantity used in conventional formulations, yet ensuring considerably shorter cross-linking times than those of formulations based on known silane-terminated prepolymers.

Abstract: Terminated silane polymers obtained by addition reactions between an organic silicon derivative and the terminal functional groups of linear or branched polymers obtained by Michael polyaddition reactions of sulphydric acid (H2S) with organic compounds which have at least two alkylenic double bonds activated by the presence, in the alpha position with respect to each alkylenic bond, of an electronegative group.