Silicone-based dental impression compounds

US7186758B2 · kind B2 · utility

Assignee

• 3M ESPE AG · DE

Inventors

• Joachim W. Zech · Kaufering, DE
• Johann Fetz · Windach, DE
• Erich Wanek · Kaufering, DE
• Ingo Wagner · Herrsching am Ammersee, DE

Key dates

• Filing date: Mar 28, 2002
• Grant date: Mar 6, 2007
• Expiry date: Jan 16, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/20
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to a two-component addition-cured silicon impression compound, comprising the following when both components are mixed: (a) between 1 and 35 wt. % of at least one organopolysiloxane comprising at least two unsaturated groups in the molecule; (b) between 1 and 10 wt. % of at least one organohydrogenpolysiloxane comprising at least two SiH groups in the molecule; (c) between 0.00005 and 0.05 wt. % of at least one platinum catalyst, calculated as elementary platinum; (d) between 4 and 10 wt. % of at least one liquid paraffin or at least one white mineral oil, or of a mixture of at least one liquid paraffin and at least one white mineral oil; (e) between 50 and 90 wt. % of at least one filler, each respective percentage relating to the total weight of the silicon impression compound. According to the invention, one of the components before being mixed with the other component has a Brookfield viscosity ranging between 800 and 2000 Pa*s. The invention is characterized in that the silicon impression compound, when mixed, has a consistency stipulated by ISO 4823 of less then or equal to 35 mm.