Curable composition for producing a dental composite crown and process of production

US11696875B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Andreas Herrmann · Steinebach, DE
• Gioacchino Raia · Türkenfeld, DE
• Malte Korten · Moorenweis, DE
• Oliver Kappler · Weilheim, DE
• Bernhard Hofmann · Peißenberg, DE
• Adrian S. Eckert · Herrsching am Ammersee, DE
• Helmar B. Mayr · Kaufering, DE
• Reinhold Hecht · Kaufering, DE
• Gallus Schechner · Herrsching am Ammersee, DE
• Rainer Guggenberger · Hanerau-Hademarschen, DE

Key dates

• Filing date: Jun 5, 2018
• Grant date: Jul 11, 2023
• Expiry date: Mar 19, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L75/06
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to A curable composition for producing dental composite crowns, the composition comprising a resin matrix comprising polymerizable (meth)acrylate(s) not comprising a urethane moiety, polymerizable urethane(meth)acrylate(s), wherein the polymerizable (meth)acrylate(s) not comprising an urethane moiety are used in excess over the polymerizable urethane(meth)acrylate(s), a filler matrix comprising nanocluster(s), fumed silica in an amount below 8 wt. % with respect to the weight of the whole composition, an initiator system comprising photoinitiator(s), organic dye(s), the curable composition not comprising softener in an amount of more than 5 wt. % with respect to the weight of the whole composition, the curable composition having a viscosity below 150 Pa*s at 23° C. and a shear rate of 1 s−1. The invention also relates to a cured article obtained by radiation curing this curable composition by use of an additive-manufacturing method.