Dental composition containing glass beads, process for production and use thereof

A dental impression composition comprising:

• at least one polydimethylsiloxane with at least 2 aliphatically unsaturated groups as component (A),
• at least one SiH compound with ≧2 SiH-groups per molecule, as component (B),
• a catalyst as component (C) being able to catalyse the reaction between components (A) and (B),
• glass beads as component (D) particle size (d50/μm) equal or below about 60 μm,
• optionally at least one non-reactive polydimethylsiloxane as component (E),
• optionally fillers as component (F) being different from the glass beads,
• optionally surfactants or wetting agents as component (G),
• optionally further additives as component (H) selected from the group consisting retarders, rheology modifiers, inhibitors, pigments, plastizers, dyes, pigments, odorous substances, flavourings, hydrogen scavenger alone or in admixture
• wherein the composition has, after hardening, a tensile strength (according to DIN 53504) of up to about 1 MPa, and
• wherein the composition is characterized by the following parameter:
• a setting time within about 15 min after mixing at ambient conditions.