Dental stereolithography-type three-dimensional printing material for preparing dental three-dimensional modeled object

Patent metadata

Field	Value
Publication number	US-11759299-B2
Application number	US-202016829212-A
Country	US
Kind code	B2
Filing date	Mar 25, 2020
Priority date	Mar 26, 2019
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

To provide a dental stereolithography-type three-dimensional printing material in which the total preparing time required from modeling with using a 3D printer to a final curing is short, work efficiency is excellent, temporal shrinkage deformation of a dental three-dimensional modeled object is suppressed and a dimensional accuracy is excellent. The dental stereolithography-type three-dimensional printing material of the present invention comprises at least one or more (a) monofunctional acrylate monomer having an aromatic ring and (b) photopolymerization initiator, wherein an electronegativity difference between adjacent atoms which are bonded by covalent bond in all atoms constituting the (a) monofunctional acrylate monomer having an aromatic ring is less than 1.0.

First claim

What is claimed is:

1. A dental stereolithography-type three-dimensional printing material comprising at least one or more (a) monofunctional acrylate monomer having an aromatic ring and (b) photopolymerization initiator, wherein
an electronegativity difference between adjacent atoms which are bonded by covalent bond in all atoms constituting the (a) monofunctional acrylate monomer having an aromatic ring is less than 1.0.

2. The dental stereolithography-type three-dimensional printing material according to claim 1 , wherein
the content of the (b) photopolymerization initiator is within a range of 0.1 to 5 wt. %.

3. The dental stereolithography-type three-dimensional printing material according to claim 2 , wherein
the dental stereolithography-type three-dimensional printing material further comprises at least one selected from a group consisting of a non-dendritic polymer containing no inorganic atom in the structure, an inorganic filler, and a coloring material.

4. The dental stereolithography-type three-dimensional printing material according to claim 3 , wherein
the dental stereolithography-type three-dimensional printing material has a viscosity (mPa·s) at 23° C. within a range of 1 to less than 3000.

5. The dental stereolithography-type three-dimensional printing material according to claim 2 , wherein
the dental stereolithography-type three-dimensional printing material has a viscosity (mPa·s) at 23° C. within a range of 1 to less than 3000.

6. The dental stereolithography-type three-dimensional printing material according to claim 1 , wherein
the dental stereolithography-type three-dimensional printing material further comprises (c) polyfunctional methacrylate monomer wherein
an electronegativity difference between adjacent atoms which are bonded by covalent bond in all atoms constituting the (c) polyfunctional methacrylate monomer is less than 1.0, and
the (c) polyfunctional methacrylate monomer satisfies the following formula (I)
Molecular weight/molecular length when both ends of the monomer molecule are methacrylate groups (angstrom)<20.0  Formula (I).

7. The dental stereolithography-type three-dimensional printing material according to claim 6 , wherein
the dental stereolithography-type three-dimensional printing material comprises, based on the total weight of the (a) monofunctional acrylate monomer having an aromatic ring, the (b) photopolymerization initiator and the (c) polyfunctional methacrylate monomer,

(a) monofunctional acrylate monomer having an aromatic ring: 10 to 70 wt. %,
(b) photopolymerization initiator: 0.1 to 5 wt. %, and
(c) polyfunctional methacrylate monomer: 25 to 89.9 wt. %.

8. The dental stereolithography-type three-dimensional printing material according to claim 7 , wherein
the dental stereolithography-type three-dimensional printing material further comprises at least one selected from a group consisting of a non-dendritic polymer containing no inorganic atom in the structure, an inorganic filler, and a coloring material.

9. The dental stereolithography-type three-dimensional printing material according to claim 8 , wherein
the dental stereolithography-type three-dimensional printing material has a viscosity (mPa·s) at 23° C. within a range of 1 to less than 3000.

10. The dental stereolithography-type three-dimensional printing material according to claim 7 , wherein
the dental stereolithography-type three-dimensional printing material has a viscosity (mPa·s) at 23° C. within a range of 1 to less than 3000.

11. The dental stereolithography-type three-dimensional printing material according to claim 6 , wherein
the dental stereolithography-type three-dimensional printing material further comprises at least one selected from a group consisting of a non-dendritic polymer containing no inorganic atom in the structure, an inorganic filler, and a coloring material.

12. The dental stereolithography-type three-dimensional printing material according to claim 11 , wherein
the dental stereolithography-type three-dimensional printing material has a viscosity (mPa·s) at 23° C. within a range of 1 to less than 3000.

13. The dental stereolithography-type three-dimensional printing material according to claim 6 , wherein
the dental stereolithography-type three-dimensional printing material has a viscosity (mPa·s) at 23° C. within a range of 1 to less than 3000.

14. The dental stereolithography-type three-dimensional printing material according to claim 1 , wherein
the dental stereolithography-type three-dimensional printing material further comprises at least one selected from a group consisting of a non-dendritic polymer containing no inorganic atom in the structure, an inorganic filler, and a coloring material.

15. The dental stereolithography-type three-dimensional printing material according to claim 14 , wherein
the dental stereolithography-type three-dimensional printing material has a viscosity (mPa·s) at 23° C. within a range of 1 to less than 3000.

16. The dental stereolithography-type three-dimensional printing material according to claim 1 , wherein
the dental stereolithography-type three-dimensional printing material has a viscosity (mPa·s) at 23° C. within a range of 1 to less than 3000.

17. A preparing method of a dental three-dimensional modeled object, wherein
the method does not comprise a step of a final curing, by a light and/or heating type post-curing device, a dental three-dimensional modeled object modeled by stereolithography-type three-dimensional printing machine using the dental stereolithography-type three-dimensional printing material according to claim 1 .

Assignees

• Shofu Inc

Inventors

• Niwa Namiki
• Fujimura Hidefumi

Classifications

• B33Y70/00 Primary

  Materials specially adapted for additive manufacturing · CPC title

• C08F220/18 Primary

  with acrylic or methacrylic acids · CPC title

• A61C13/0019 Primary

  using three dimensional printing · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• A61K6/62

  Photochemical radical initiators · CPC title