Sun Medical Co., Ltd.

Mitsui Chemicals, Inc.

Tatsuya Ori

Masami Arata

Yuya Yamamoto

Takashi Yamamoto

Akari Yamamoto

Tamaki Otsuki

Yoshimitsu Tanabe

Kazuhiko Yoshinaga

Shinsuke Kinoshita

Takenori Mitamura

Masuji Tsuchikawa

Hiroki Murai

Sayaka Miyamori

Yoshiaki Katsura

Takeshi Yokoyama

Yoshihisa Kamimoto

Hirohisa Shimizu

Asami Okuda

Yasukazu Saimi

Maho Yoshikawa

Haruka Nishitani

Toshiki Ono

Masayuki Asai

The present invention improves the long-term storage stability of an organoborane-Lewis base complex. First composite particles of the present invention include particles of an organic polymer (B), and an organoborane-Lewis base complex (A) contained in the particles. Second composite particles of the present invention include particles of an inorganic compound (B'), and an organoborane-Lewis base complex (A) adsorbed on the particles.

Composite particles, kit, material, and method for producing composite particles

The present invention improves the long-term storage stability of a polymerizable composition including an organoborane and a polymerizable monomer. A polymerizable composition includes (A) an organoborane, (B) an acidic group-free polymerizable monomer, and (C) a stabilizer for the organoborane (A), the composition being such that when the composition, after being allowed to stand at 45&#xb0; C. for 48 hours, is analyzed with an E-type viscometer at a temperature of 25&#xb0; C. and a rotational speed of 50 rpm, the ratio of the viscosity after the standing to the viscosity before the standing (viscosity after standing/viscosity before standing) is less than 100.

Polymerizable composition and kit, and polymerization initiator

A dental adhesive curable composition containing a polymerizable monomer including a polymerizable monomer represented by formula (1') and defined amounts of an acidic group-containing polymerizable monomer, a polymerization initiator containing a peroxide and a photopolymerization initiator, and a reductant containing a sulfinic acid compound and/or a salt thereof, and a filler: wherein the R groups, n and m are defined. A dental adhesive curable kit and a mobile tooth fixing material are also provided.

Dental polymerizable monomers, compositions, adhesive dental materials and kits

The present invention provides polymerizable monomers represented by the following general formula (1) that are useful as dental materials.  In the general formula (1), Ris a divalent Caromatic hydrocarbon group or a divalent Coptionally bridged cyclic hydrocarbon group, Rand Rare each a hydrogen atom or a Calkyl group, R, R, Rand Rare each a hydrogen atom or a hydrocarbon group, Rand Rare each a hydrogen atom or a methyl group, m and n are each independently 0 to 4, and Rand Rare each independently a Clinear alkylene or Clinear oxyalkylene group optionally substituted with a Calkyl group or a (meth)acryloyloxymethylene group in place of a hydrogen atom.

An easily removable dental curable composition which prevents the fall or leakage of a temporary prosthetic appliance or a root canal filling material which is easily removed by bonding and adhering it to tooth, shows such high flowability that its operation is easy, has a long working time and excellent X-ray contrast properties and sealability and can be easily removed as required, and a filling kit. The dental curable composition comprises (A) a polymerizable monomer mixture containing a polymerizable monomer having an acid group in the molecule and (B) a polymerization initiator, wherein the component (A) contains (A') a long-chain polymerizable monomer having a structure with a chain length of 17 or more atoms and/or the composition further comprises (D1) a soft resin material.

Easily removable dental curable composition

A dental curable composition has a curing time of 30 seconds to 120 minutes and includes a compound having an acidic group in the molecule (A), a polymerizable monomer (B), an organic amine compound (C) and a sulfur-containing reducing compound (D). In the dental curable composition, the content of the component (A) is 0.01 to 80 parts by weight, the content of the component (B) is 21 to 99.8 parts by weight, the content of the component (C) is 0.01 to 30 parts by weight and the content of the component (D) is 0 to 30 parts by weight. The composition may be cured at a relatively low temperature close to the body temperature without using a peroxide-based polymerization initiator, and has good sealing properties and adhesion.

Dental curable composition and kit for such dental curable composition

A reaction-curable adhesive composition exhibiting acidity is formed form a weakly acidic to alkaline composition (I) comprising (a) a polymerizable monomer and (b) a compound represented by the following formula (I) and a strongly acidic composition (II) comprising (a) a polymerizable monomer.R&#x2014;CH&#x2014;NRCHCOOR&#x2003;&#x2003;(1)wherein Rand Rare each independently a hydrogen atom or an alkyl group which may have a functional group, and Ris a hydrogen atom or a metal atom. The composition containing the polymerizable monomer can be stably stored for a long period of time.

Reaction-curable adhesive composition and dental adhesive kit

There are provided a novel polymerizable composition having an X-ray contrast property and excellent transparency, a cured product thereof, and a composite material comprising powder of the cured product. More specifically, there are provided a polymerizable composition comprising (A) an inorganic oxide having an X-ray contrast property and an average particle diameter of 100 nm or smaller, (B) a surface modifier, (C) a polymerizable compound and (D) a polymerization initiator, a cured product obtained by polymerizing these components, and a composite material comprising powder of the cured product.

Polymerizable composition, cured object obtained therefrom, and composite material

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Moriyama, Japan

Tatsuya Ori