Shofu Inc.

Mitsui Chemicals, Inc.

Kabushikikaisha Shofu

Sun Medical Co., Ltd.

Shunsuke Miyata

Daisuke Hara

Kenzo Yamamoto

Hideto Kasaba

Yoshimitsu Tanabe

Hiroshi Naruse

Osamu Kohgo

Katsuya Kimoto

Masataka Miyasato

Hideyuki Ueki

Chidzuru Inami

Toshiyuki Nakatsuka

Hiroyuki Kobayashi

Hidefumi Fujimura

Yuji Sadakane

[Problem] To provide a dental photocurable composition which has sufficient mechanical property and whose rheological property is not deactivated even after long-term storage. [Solution] The dental photocurable composition of the present disclosure comprises (A) polymerizable monomer, (B) photosensitizer, (D) photopolymerization accelerator and (E) filler, wherein, the dental photocurable composition comprises (D1) aliphatic tertiary amine compound represented by formula (1) as the (D) photopolymerization accelerator, and the dental photocurable composition comprises (E1) hydrophobized silica fine particle having an average diameter of primary particle of 1 to 40 nm as the (E) filler. (wherein Rrepresents a substituent consisting of three or more carbons having an electron-withdrawing group at α-carbon and/or β-carbon of an amine starting from N, Rrepresents a substituent consisting of three or more carbons which may have an electron-withdrawing group, Rrepresents a substituent consisting of one or more carbons which may have an electron-withdrawing group, and α-carbon of N in the formula (1) is not an electron-withdrawing group.)

Dental photocurable composition excellent in operability and storage stability

The present invention provides a photopolymerization initiator capable of exhibiting excellent sensitivity to photopolymerization and ensuring a sufficient pot life under ambient light, and a dental photocurable composition comprising the photopolymerization initiator. More specifically, the present invention provides a photopolymerization initiator (c) used in a dental photocurable composition, comprising: (c-1) a photosensitizer, (c-2) a polymerization accelerator, and (c-3) an aryliodonium salt represented by the formula (1): [Chemical Formula 1][()[()]&#x2003;&#x2003;()wherein, R1 represents an organic group bonded to I, R2 represents an alkyl group in which a part of hydrogen atoms is substituted with a flourine atom, and b represents the number thereof which is an integer of from 1 to 5, and a dental photocurable composition comprising the photopolymerization initiator.

Photopolymerization initiator comprising an aryliodonium salt for dental photocurable compositions

[Problem] To provide a dental photocurable composition having sufficient mechanical property and being excellent in color tone selectivity because of having a small color difference between before curing and after curing. [Solution] To provide a dental photocurable composition, comprising (A) polymerizable monomer, (B) photosensitizer, (C) photoacid generator, (D) photopolymerization accelerator and (E) filler, wherein, the dental photocurable composition comprises (B-1) &#x3b1;-diketone compound as the (B) photosensitizer, and the dental photocurable composition comprises, with respect to 100 parts by mass of the (A) polymerizable monomer, 0.15 parts by mass or less of the (B-1) &#x3b1;-diketone compound, 0.5 parts by mass or more of the (C) photoacid generator, and 100 parts by mass or more of the (E) filler.

Dental photocurable composition excellent in color tone selectivity

To provide a dental photocurable composition which can exhibit excellent mechanical characteristics even after returning from a low temperature to room temperature. To provide a dental photocurable composition, comprising (A) polymerizable monomer, (B) photosensitizer, (C) photoacid generator and (D) photopolymerization accelerator and the (C) photoacid generator may include only (C-1) iodonium salt-based compound of an anion having log S of &#x2212;4 or less.

Dental photocurable composition containing high soluble photoacid generator

[Problem] To provide a photocurable composition having a high curing depth. [Solution] To provide a photocurable composition of the present disclosure comprises (A) polymerizable monomer, (B) photosensitizer, (C) photoacid generator, and (D) photopolymerization accelerator, wherein, the photocurable composition comprises (D-1) amine compound represented by formula (1) as the (D) photopolymerization accelerator. (In the formula (1), Ris a substituent represented by formula (2), and Rand Rare substituents represented by formula (2) or substituents selected from &#x2014;OH group, &#x2014;O&#x2014; group, &#x2014;S&#x2014; group, &#x2014;NH&#x2014;C(O)&#x2014;NH&#x2014; group, &#x2014;C(O)&#x2014;O&#x2014; group, &#x2014;OC(O)&#x2014; group, &#x2014;OC(O)&#x2014;NH&#x2014; group, &#x2014;NH&#x2014;C(O)&#x2014;O&#x2014; group, halogen, an organic group which may have an alkoxysilyl group, an aromatic ring which may have a substituent and an alicyclic heterocycle which may have a substituent. Further, Rand Rmay be H when at least one or more Rs of the formula (2) are an aromatic ring, and Rmay be H when Ris a substituent represented by the formula (2)).

Photocurable composition excellent in curing depth

To provide a one paste type dental adhesive composition which has mechanical characteristics and aesthetic property required in the restoration material, is superior in durable adhesive strength to the tooth substance, and is hard to be affected by the polymerization shrinkage stress and exhibits excellent durable adhesive strength even if the composition of the present invention is collectively filled and cured. To provide a dental adhesive composition comprising: (a) an acidic group-non-containing polymerizable monomer, (b) an acidic group-containing polymerizable monomer, (c) a filler, (d) a photo polymerization initiator, and (e) a chain transfer agent, wherein the chain transfer agent (e) contains &#x3b1;-alkylstyrene compound.

Dental adhesive composition including chain transfer agent

To provide an organic-inorganic composite filler containing; a polymerizable monomer (a) having at least one functional group selected from the group consisting of &#x2014;OH group, &#x2014;NH&#x2014; group, and &#x2014;NHgroup, a polymerizable monomer (b) having no functional group selected from the group consisting of &#x2014;OH group, &#x2014;NH&#x2014; group, and &#x2014;NHgroup, a polymerization initiator (c), an inorganic filler (d), and a silane compound (e) which generates &#x2014;OH group by hydrolysis.

Organic-inorganic composite filler having many reaction groups on surface and dental curable composition compounded therewith

The present invention relates to a dental curing composition to restore a lost portion of a tooth generated due to dental caries, tooth fracturing, etc. The dental curing composition has packability suitable for restoring a posterior tooth; has a paste character of avoiding stickiness to a filling instrument; has excellent shaping properties; has very little paste character over time; and has a low polymerization shrinkage property. The dental curing composition comprises: (a) a matrix resin whose viscosity at 25&#xb0; C. is 10,000 to 17,000 mPa&#xb7;s, (b) an organic-inorganic composite filler, (c) an inorganic filler, and (d) a polymeric initiator.

Dental curing composition

The present invention provides a dental material, a dental material composition and a dental restorative material that exhibit small polymerization shrinkage particularly during curing and are producible at low cost on the industrial scale. The dental material of the present invention includes a specific urethane (meth)acrylic compound represented by Formula (1) described below. 

Dental material, dental material composition, dental restorative material, and cured product

The present invention provides a novel compound and a composition including the compound that exhibit small polymerization shrinkage particularly during curing and are producible at low cost on the industrial scale. The compound of the present invention is represented by Formula (1): 

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Kyoto, Japan

Shunsuke Miyata