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1. 发明授权

US11655324B2 Resin composition for optical shaping 有权
公开(公告)号：US11655324B2
公开(公告)日：2023-05-23
申请号：US17282603
申请日：2019-10-04
申请人： KURARAY NORITAKE DENTAL INC.
发明人： Misaki Ito , Kenji Suzuki
IPC分类号： C08F2/46 , C08F2/50 , C08G61/04 , C08F290/06 , B33Y70/00 , A61C13/00 , A61C13/01 , C08G18/24 , C08G18/42 , C08G18/44 , C08G18/67 , C08G18/75 , B33Y10/00 , B33Y80/00 , B29C64/124 , A61C7/08 , B29K33/04 , B29L31/00
CPC分类号： C08F290/067 , A61C13/0013 , A61C13/01 , B33Y70/00 , C08G18/246 , C08G18/4213 , C08G18/4238 , C08G18/44 , C08G18/6755 , C08G18/755 , A61C7/08 , B29C64/124 , B29K2033/04 , B29L2031/7536 , B33Y10/00 , B33Y80/00
摘要： The present invention provides a resin composition for optical shaping that, with its low viscosity, enables easy stereolithographical fabrication of an object, and that can produce an object having desirable toughness and desirable water resistance, particularly for dental mouthpieces and denture base materials. The present invention relates to a resin composition for optical shaping comprising a urethanized (meth)acrylic compound (A) and a photopolymerization initiator (B), the urethanized (meth)acrylic compound (A) being a (meth)acrylate containing at least one polyol moiety and a urethane bond per molecule, said at least one polyol moiety being selected from the group consisting of a polyester, a polycarbonate, a polyurethane, and a polyether each having a structure derived from a C4 to C18 aliphatic chain diol unit (a) having a branched structure.

2. 发明申请

US20230096105A1 RESIN COMPOSITION FOR STEREOLITHOGRAPHY 有权
公开(公告)号：US20230096105A1
公开(公告)日：2023-03-30
申请号：US17908937
申请日：2021-03-05
申请人： KURARAY NORITAKE DENTAL INC.
发明人： Kenji SUZUKI , Shumei ISHIHARA , Misaki ITO
IPC分类号： B29C64/124 , B33Y10/00 , B33Y70/00 , B33Y80/00
摘要： The present invention provides a resin composition for stereolithography that is easily shapable with good shape precision while reducing sedimentation of inorganic particles during storage, and a obtained three-dimensional shaped article thereby excels in mechanical characteristics such as flexural strength and flexural modulus, in addition to having a desirable shade and good shade stability. The present invention relates to a resin composition for stereolithography comprising a polymerizable monomer (a), a photopolymerization initiator (b), an inorganic particle (c) having an average particle diameter of 5 to 500 nm, and a hindered phenolic compound (d), wherein the content of the photopolymerization initiator (b) is 0.1 to 10 parts by mass relative to 100 parts by mass of the polymerizable monomer (a), the content of the inorganic particle (c) is 50 to 400 parts by mass relative to 100 parts by mass of the polymerizable monomer (a), and the content of the hindered phenolic compound (d) is 0.1 to 500 parts by mass relative to 100 parts by mass of the photopolymerization initiator (b).

3. 发明申请

US20230019835A1 ZIRCONIA COMPOSITION, PRE-SINTERED BODY AND SINTERED BODY, AND METHOD OF PRODUCING THE SAME 有权
公开(公告)号：US20230019835A1
公开(公告)日：2023-01-19
申请号：US17932459
申请日：2022-09-15
申请人： KURARAY NORITAKE DENTAL INC.
发明人： Yoshihisa ITO
IPC分类号： C04B35/48 , A61C5/73
摘要： A composition comprises a zirconia powder, in which 55% or more thereof is monoclinic, and a stabilizer capable of suppressing phase transition of zirconia. An average particle diameter of zirconia particles and particles of the stabilizer is 0.06 μm to 0.17 μm. At least a portion of the stabilizer does not form a solid solution with zirconia.

4. 发明授权

US11479510B2 Method for producing zirconia particle-containing powder 有权
公开(公告)号：US11479510B2
公开(公告)日：2022-10-25
申请号：US16635201
申请日：2018-07-27
申请人： KURARAY NORITAKE DENTAL INC.
发明人： Yasutaka Kudo
IPC分类号： C04B35/486 , A61C13/08 , C04B35/626 , C04B35/628 , C04B35/634 , C04B35/64 , C09K11/77 , C09K11/67
摘要： The present invention provides a method for producing a zirconia particle-containing powder that enables easy production of a zirconia sintered body having both high translucency and high strength. The present invention relates to a method for producing a zirconia particle-containing powder, comprising a drying step of spray drying a slurry containing zirconia particles, wherein the zirconia particles have an average primary particle diameter of 30 nm or less, and the slurry comprises a dispersion medium containing a liquid having a surface tension at 25° C. of 50 mN/m or less. Preferably, the zirconia particles comprise 2.0 to 9.0 mol % yttria. Preferably, wherein the content of the liquid in the dispersion medium is 50 mass % or more.

5. 发明授权

US11472107B2 Container for stereolithography apparatus 有权
公开(公告)号：US11472107B2
公开(公告)日：2022-10-18
申请号：US16622514
申请日：2018-06-14
申请人： KURARAY NORITAKE DENTAL INC.
发明人： Kenji Suzuki , Hiroyuki Sakamoto
IPC分类号： B29C64/255 , B29C64/135 , B32B27/30 , B33Y30/00 , B33Y40/00
摘要： The present invention provides a container used in a stereolithography apparatus and having excellent transparency, shape accuracy, and durability. The present invention relates to a container for holding a photocurable composition (3), the container being used in a stereolithography apparatus comprising a container (2), an active energy beam irradiation apparatus (5), and an actuator (8), wherein the container (2) comprises a bottom (2′) and a wall, the bottom (2′) comprises a first layer (X) comprising a hard resin, a second layer (Y) comprising a soft resin, and a third layer (Z) comprising a fluorine resin, the second layer (Y) is laminated on the first layer (X) and the third layer (Z) is laminated on the second layer (Y), the pencil hardness measured according to JIS K 5600-5-4:1999 for the first layer (X) is 3 B or harder, the hardness measured for the second layer (Y) using a type A durometer compliant with JIS K 6253-3:2012 is 10 to 90, and the third layer (Z) has a thickness of 0.1 to 5.0 mm.

6. 发明授权

US11365280B2 Photocurable resin composition 有权
公开(公告)号：US11365280B2
公开(公告)日：2022-06-21
申请号：US17041600
申请日：2019-03-28
申请人： KURARAY NORITAKE DENTAL INC.
发明人： Kenji Suzuki
IPC分类号： C08F2/46 , C08F2/50 , C08G61/04 , C08G18/67 , B33Y70/00 , B33Y80/00 , B29C64/314 , B33Y40/10 , A61K6/893 , C08F290/06 , B33Y10/00 , B29C64/124 , B29K33/00 , B29L31/00
摘要： The present invention provides a photocurable resin composition that has good fabricability, and that exhibits superior flexibility, fracture resistance, and water resistance in the form of a cured product. The present invention relates to a photocurable resin composition comprising: a urethanized (meth)acrylic compound (A); a mono(meth)acrylic acid ester compound (B) containing no urethane bond; and a photopolymerization initiator (C), the urethanized (meth)acrylic compound (A) being a (meth)acrylate comprising, per molecule, at least one kind of structure selected from the group consisting of a polyester, a polycarbonate, a polyurethane, a polyether, a poly-conjugated diene, and a hydrogenated poly-conjugated diene; and a urethane bond, the mono(meth)acrylic acid ester compound (B) containing no urethane bond comprising at least one selected from the group consisting of a mono(meth)acrylic acid ester compound (b-I) represented by general formula (I), and a mono(meth)acrylic acid ester compound (b-II) represented by general formula (II).

7. 发明申请

US20220008314A1 DENTAL CLEANER AND DENTAL REMOVER FOR TEMPORARY ADHESIVES 有权
公开(公告)号：US20220008314A1
公开(公告)日：2022-01-13
申请号：US17295796
申请日：2019-11-19
申请人： KURARAY NORITAKE DENTAL INC.
发明人： Keishu OKADA , Mariko KAWANA , Nobusuke KASHIKI , Yamato NOJIRI , Yuko TAJIRI , Atsushi MINE , Hirofumi YATANI
IPC分类号： A61K8/81 , A61Q11/00 , A61K8/41 , A61K8/25
摘要： The present invention provides a dental cleaner that provides desirable cleanliness against contamination of dental restorations and abutment teeth due to protein-containing body fluids while ensuring uniform quality by reducing precipitation of salts, and that ensures desirable bond durability after cleaning while being safe to use in the oral cavity. The present invention relates to a dental cleaner comprising an acidic group-containing radical polymerizable monomer (a), water (b), and an organic amine compound (c). The present invention also relates to a dental remover for temporary adhesives comprising an acidic group-containing compound (A), water (B), and a basic compound (C).

8. 发明申请

US20210169747A1 DENTAL PRODUCT WITH ENHANCED TOUGHNESS 有权
公开(公告)号：US20210169747A1
公开(公告)日：2021-06-10
申请号：US16761551
申请日：2018-11-06
申请人： KURARAY NORITAKE DENTAL INC.
发明人： Yuta TAJIMA , Toshio SAKAKIBARA , Kiyoko BAN
IPC分类号： A61K6/818 , A61C5/77 , A61C8/00 , C04B41/87 , C04B41/50 , A61K6/20
摘要： The present invention provides a dental product comprising a base material formed of a zirconia sintered body, and having high aesthetic quality with enhanced fracture toughness and with reduced chipping and cracking in the porcelain layer. The present invention also provides a method for manufacturing such a dental product. The present invention relates to a dental product comprising: a base material formed of a zirconia sintered body, and a porcelain layer, wherein the porcelain of the porcelain layer has a suitable firing temperature of 900° C. or more, and the porcelain layer has a fracture toughness value of 1.20 MPa·m0.5 or more.

9. 发明申请

US20210145701A1 ADHESIVE COMPOSITION FOR DENTAL USE 有权
公开(公告)号：US20210145701A1
公开(公告)日：2021-05-20
申请号：US17048799
申请日：2019-04-19
申请人： KURARAY NORITAKE DENTAL INC.
发明人： Yamato NOJIRI , Naoki NISHIGAKI , Mitsunobu KAWASHIMA
IPC分类号： A61K6/30 , C08L43/02
摘要： The present invention provides a dental adhesive composition that, even after photocuring with a high-output LED irradiator, shows high bond strength not only for dentin untreated by phosphoric acid etching but also for dentin treated by phosphoric acid etching. The present invention relates to a dental adhesive composition comprising a phosphoric acid group-containing polymerizable monomer (A), the phosphoric acid group-containing polymerizable monomer (A) comprising: a dihydrogen phosphate monoester group-containing polymerizable monomer (A-1) represented by general formula (1); a hydrogen phosphate diester group-containing polymerizable monomer (A-2) represented by general formula (2); and a phosphoric acid tetraester group-containing polymerizable monomer (A-3) represented by general formula (3).

10. 发明申请

US20210015716A1 DENTAL ADHESIVE MATERIAL KIT 有权
公开(公告)号：US20210015716A1
公开(公告)日：2021-01-21
申请号：US16955888
申请日：2018-12-20
申请人： KURARAY NORITAKE DENTAL INC.
发明人： Ling HONG , Shumei ISHIHARA , Nobusuke KASHIKI
IPC分类号： A61K6/896 , A61K6/62 , A61K6/58
摘要： The present invention provides a dental adhesive material kit that exhibits high adhesive property to tooth structure and dental prosthesis through photopolymerization while maintaining good ease of handling with the paste properties that undergo little change during long storage. The present invention relates to a dental adhesive material kit comprising:
an aqueous adhesive dental composition (X) comprising a radical polymerizable monomer (a) containing an acidic group, a polymerization accelerator (b), water (c), and a radical polymerizable monomer (d) containing no acidic group; and
a curable dental composition (Y) comprising a hydrophilic radical polymerizable monomer (d-1) containing no acidic group, a hydrophobic radical polymerizable monomer (d-2) containing no acidic group, a chemical polymerization initiator (e), a photopolymerization initiator (f), and a filler (g),
the filler (g) being a filler treated with a surface treatment agent, and having an average particle diameter of 0.01 to 50.0 μm,
the surface treatment agent comprising a silane coupling agent (A) represented by general formula [1], and an organosilazane (B) represented by general formula [2].

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