US 11,744,781 B2
Dental photopolymerizable composition for 3D printer
Mamoru Hosokawa, Kyoto (JP); and Hidefumi Fujimura, Kyoto (JP)
Assigned to SHOFU INC., Kyoto (JP)
Filed by SHOFU INC., Kyoto (JP)
Filed on Aug. 25, 2020, as Appl. No. 17/1,853.
Claims priority of application No. 2019-153828 (JP), filed on Aug. 26, 2019.
Prior Publication US 2021/0137796 A1, May 13, 2021
Int. Cl. A61K 6/887 (2020.01); B33Y 80/00 (2015.01); A61K 6/76 (2020.01); A61K 6/62 (2020.01); B33Y 70/10 (2020.01); A61K 6/17 (2020.01)
CPC A61K 6/887 (2020.01) [A61K 6/17 (2020.01); A61K 6/62 (2020.01); A61K 6/76 (2020.01); B33Y 70/10 (2020.01); B33Y 80/00 (2014.12)] 19 Claims
 
1. A dental photopolymerizable composition for 3D printer comprising:
a (a) (meth)acrylate-based polymerizable monomer consisting of a (a1) (meth)acrylate-based polymerizable monomer containing a urethane structure, a (a2) (meth)acrylate-based polymerizable monomer not containing a urethane structure, and optionally, a (a3) polyfunctional (meth) acrylate-based polymerizable monomer having a branched structure and at least 3 or more (meth)acrylate moieties,
a (b) cohesive inorganic filler in which nano-sized primary particles are aggregated, and
a (c) photopolymerization initiator, wherein;
a ratio of the (a1) (meth)acrylate-based polymerizable monomer containing a urethane structure and the (a2) (meth)acrylate-based polymerizable monomer not containing a urethane structure in the (a) (meth)acrylate-based polymerizable monomer is 51 to 80: 49 to 20 pts.wt.,
a ratio of the (a) (meth)acrylate-based polymerizable monomer and the (b) cohesive inorganic filler is 65 to 90: 35 to 10 pts.wt.,
the dental photopolymerizable composition for 3D printer contains 0.1 to 5 pts.wt. of the (c) photopolymerization initiator based on 100 pts.wt. of the (a) (meth)acrylate-based polymerizable monomer, and
the (b) cohesive inorganic filler consists of 60 to 100 wt. % of SiO2 and 0 to 40 wt. % of ZrO2.