ELASTOMERIC HYDROPHILIC SILICONE MATERIAL USED IN PARTICULAR FOR THE TAKING OF DENTAL IMPRESSIONS

摘要

The invention concerns a silicone material crosslinkable into silicone elastomer by polyaddition reactions, useful in particular for impressions, for example dental. The invention aims at providing a material offering a compromise between the following characteristics: fluidity (in non crosslinked sate), hydrophily (in non crosslinked or crosslinked state) and high mechanical properties (in crosslinked state). The invention is characterised in that it consists in introducing into the crosslinkable silicone material: (i) a reinforcing siliceous filler in the form of a suspension obtained by subjecting the filler to a treatment in two stages by an agent providing compatibility (selected for example, concerning the first stage, among a silazane, a hydroxyl-containing siloxane, an amine, an organic acid; and concerning the second stage, among a silazane), by operating in the presence of a polyorganosiloxane with Si-alkenyl functions; and (2i) one or several non-ionic, ionic or amphoteric surfactants. Said silicone material is particularly useful for impressions, for example dental impressions and for making pads used in pad printing techniques.