Hydrophilic silicone elastomer material used in particular for taking dental imprints

摘要

The invention relates to a setting silicone material to give a silicone elastomer by polyaddition reactions, particularly useful for taking imprints, for example dental imprints. The aim of the invention is a material which has a level of hydrophilicity characterised by achieving contact angles theta (cf. FIG. 1 where (1) represents the surface of a film of set silicone material and (2) represents the drop of water deposited on said surface) which can be as low as those from 25 to 27°. The invention is based upon the introduction into the setting silicone material of particularly: (a) at least one non-ionic surfactant comprising an ester obtained by esterification of a C10-C14 fatty acid with a poly(oxyalkylene) glycol of low molecular weight; or a synergistic mixture of (a)+(b) where (b) is at least one non-ionic surfactant comprising a polyalkoxylated C5-C16 fatty alcohol of low molecular weight. Said silicone material may be used for the taking of imprints, for example, dental imprints and for production of moulded pieces in addition to copying masses in dental applications, which can develop a marked hydrophilic and/or anti-static character on the surface thereof.