THIXOTROPIC FORMULATIONS OF SILICONE PASTES, FOR IMPRESSIONS OF TEETH AND MUCOUS MEMBRANE

摘要

The invention relates to thixotropic formulations of silicone pastes for the production of exact impressions of teeth and mucous membrane. The pastes consist essentially of a) 50-90%, based on the weight of the paste, of a silicone oil with terminal hydroxyl groups; b) 1-15%, based on the weight of the paste, of an organic thixotropic agent; and c) 5-50% of calcium silicate; wherein (i) said calcium silicate has a specific surface area of 20 to 100 m2/g (measured by the BET method) and (ii) said thixotropic agent is selected from the group consisting of hydrogenated caster oil and polyglycol ethers of glycerides. The pastes exhibit superior thixotropic properties which makes for greater convenience in use.