	US 11,696,875 B2
	Curable composition for producing a dental composite crown and process of production
Andreas Herrmann, Munich (DE); Gioacchino Raia, Türkenfeld (DE); Malte Korten, Moorenweis (DE); Oliver Kappler, Weilheim (DE); Bernhard Hofmann, Peißenberg (DE); Adrian Eckert, Herrsching (DE); Helmar Mayr, Kaufering (DE); Reinhold Hecht, Kaufering (DE); Gallus Schechner, Herrsching (DE); and Rainer Guggenberger, Herrsching (DE)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 16/622,530
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Jun. 5, 2018, PCT No. PCT/US2018/036025 § 371(c)(1), (2) Date Dec. 13, 2019, PCT Pub. No. WO2018/231583, PCT Pub. Date Dec. 20, 2018.
Claims priority of application No. 17176014 (EP), filed on Jun. 14, 2017.
Prior Publication US 2020/0206092 A1, Jul. 2, 2020
Int. Cl. A61K 6/887 (2020.01); A61C 5/73 (2017.01); A61K 6/77 (2020.01); A61K 6/65 (2020.01); A61K 6/76 (2020.01); A61K 6/62 (2020.01); A61K 6/17 (2020.01); C08L 33/08 (2006.01); C08L 33/10 (2006.01); C08L 75/06 (2006.01)

CPC A61K 6/887 (2020.01) [A61C 5/73 (2017.02); A61K 6/17 (2020.01); A61K 6/62 (2020.01); A61K 6/65 (2020.01); A61K 6/76 (2020.01); A61K 6/77 (2020.01); C08L 33/08 (2013.01); C08L 33/10 (2013.01); C08L 75/06 (2013.01)]

15 Claims

1. A curable composition for producing dental composite crowns, the curable composition comprising

a resin matrix comprising:

polymerizable (meth)acrylate(s) not comprising a urethane moiety present in an amount of 40 to 85 wt %, and

polymerizable urethane(meth)acrylate(s) present in an amount from 1 to 35 wt %;

a filler matrix present in an amount of 5 to 45 wt %, the filler matrix comprising:

nanocluster(s) present in an amount of 5 to 40 wt %,

optionally fumed silica present in an amount below 8 wt. %,

wherein any optional fumed silica excludes (meth)acrylate silane surface treatment;

an initiator system comprising:

photoinitiator(s) present in an amount of 0.01 to 3 wt %, and

organic dye(s) present in an amount of 0.001 to 0.5 wt %; and

a softener in an amount of no greater than 5 wt. %,

wherein the curable composition is characterized by a viscosity below 150 Pa*s at 23° C. and a shear rate of 1 s⁻¹, and

wherein wt. % is with respect to the weight of the curable composition.