Mitsui Chemicals, Inc.

Yamamoto Chemicals, Inc.

Naoyuki Kakinuma

Shigetoshi Kuma

Hidetaka Tsukada

Kouya Kojima

Koichi Tokunaga

Satoshi Yamasaki

Masayuki Furuya

Toshihiko Nakagawa

Kenichi Goto

Shinsuke Ito

Toshiya Hashimoto

Michiharu Sakata

Takeshi Fukuda

Shinji Kiyono

Chitoshi Shimakawa

Daisuke Hasegawa

Hirokazu Morita

Goro Kuwamura

Tetsuya Hamada

Daisuke Nishiguchi

Kazuhiro Kosumi

Hiroyuki Sasaki

Satoshi Kinoshita

Mamoru Tanaka

Mamoru Takashina

Kouju Okazaki

Motoharu Oiki

Koji Suesugi

Kouichi Tokunaga

Takuya Matsumoto

Eri Koizumi

It is an object of the present invention to provide a monomer which can provide a cured product having both high toughness and rigidity. The present invention is a (meth)acrylate (D) which is a reaction product of a thiol compound (A) having two or more mercapto groups; an iso(thio)cyanate compound (B) having two or more iso(thio)cyanato groups; and a hydroxy (meth)acrylate compound (C) having one or more polymerizable groups.

(Meth)acrylate and use thereof

A (meth)acrylate includes a compound (X) having a structure formed by a reaction of an epoxy compound (A) containing an epoxy group and a tertiary carbon atom or a quaternary carbon atom, a (meth)acrylic acid (B), and an iso(thio)cyanate compound (C) having two or more iso(thio)cyanate groups.

(Meth)acrylate, monomer composition, molded body, composition for dental material, and dental material

A monomer composition, including: an acidic phosphoric acid ester (A); an amine-based catalyst (B); and a (meth)acrylate (E) having at least one of a urethane bond or a —NHC(═S)O— bond.

Monomer composition and production method thereof, raw material composition, curable composition, and molded body

A (meth)acrylate includes a reaction product of a thiol compound containing two or more thiol groups, and a (meth)acrylate compound containing two or more (meth)acryloyloxy groups.

(Meth)acrylate, monomer composition for dental material, molded body, composition for dental material, dental material, and method of manufacturing (meth)acrylate

Provided are a polymerizable composition for a dental material that can yield cured molded bodies having superior mechanical strength, a molded body obtained by curing the composition, and a dental material including the molded body. A polymerizable composition for a dental material, the polymerizable composition containing: one selected from the group consisting of allyl compound (A) and an oligomer of allyl compound (A); and (meth)acrylate compound (B).

Polymerizable composition for dental material, and dental material obtained from said composition

Provided are a monomer which can provide a cured product having both high toughness and rigidity, a monomer composition containing the monomer, the monomer composition used as a dental material monomer composition, a dental material composition containing the monomer composition or the dental material monomer composition, a cured product thereof having excellent mechanical properties, a dental material formed by curing the dental material composition, a method for producing the monomer composition, and a method for producing the dental material. A (meth)acrylate (D) is a reaction product of an amine compound (A) having two or more amino groups, an iso(thio)cyanate compound (B) having two or more iso(thio)cyanato groups, and a hydroxy (meth)acrylate compound (C) having one or more polymerizable groups.

(Meth)acrylate, monomer composition, dental material obtained from composition, and production method thereof

A polymerizable composition for an optical material includes an episulfide compound (A); an organic coloring matter (B); an UV absorber (C); and a polymerization catalyst (D), wherein the organic coloring matter (B) has a main absorption peak (P) between 565 nm and 605 nm in a visible light absorption spectrum, an absorption coefficient (ml/g&#xb7;cm) of a peak apex (Pmax) exhibiting a maximum absorption coefficient of (P) is equal to or greater than 0.5&#xd7;105, a peak width in an absorbance of &#xbc; of an absorbance of (Pmax) of (P) is equal to or less than 50 nm, a peak width in an absorbance of &#xbd; of the absorbance of (Pmax) of (P) is equal to or less than 30 nm, and a peak width in an absorbance of &#x2154; of the absorbance of (Pmax) of (P) is in a range of equal to or less than 20 nm.

Polymerizable composition for optical material, optical material, process for preparing polymerizable composition for optical material, and method of manufacturing optical material

An optical material of the present invention has a minimum transmittance value in a wavelength range of 445 nm to 470 nm of a transmittance curve measured at a thickness of 2 mm of the optical material.

Optical material and use thereof

A manufacturing method of an amine compound including obtaining a reaction solution containing an aldehyde compound by reacting a compound represented by Formula (a1) or (a2) with hydrogen and carbon monoxide in the presence of a metal compound of groups 8 to 10 and a phosphorus compound, neutralizing the reaction, purifying an aldehyde compound by distilling the neutralized reaction solution, and reacting the aldehyde compound with ammonia and with hydrogen in the presence of a catalyst to obtain an amine compound, wherein the phosphorus compound is represented by the Formula (RO)P, and the base compound is at least one selected from carbonate and hydrogen carbonate of metals of group I and carbonate and hydrogen carbonate of metals of group II, and wherein the neutralizing the reaction solution is performed within a temperature range of 40&#xb0; C. to 50&#xb0; C.

Purification method of aldehyde compound

A manufacturing method of an isocyanate compound including obtaining a reaction solution containing an aldehyde compound by reacting a compound represented by Formula (a1) or (a2) with hydrogen and carbon monoxide in the presence of a metal compound of groups 8 to 10 and a phosphorus compound, neutralizing the reaction solution, purifying an aldehyde compound by distilling the neutralized reaction solution, reacting the aldehyde compound with ammonia and with hydrogen in the presence of a catalyst to obtain an amine compound; and reacting the amine compound with a carbonylating agent to obtain an isocyanate compound, wherein the phosphorus compound is represented by the Formula (RO)P, and the base compound is at least one selected from carbonate and hydrogen carbonate of metals of group I and carbonate and hydrogen carbonate of metals of group II, wherein the neutralizing the reaction solution is performed within a temperature range of 40&#xb0; C. to 50&#xb0; C.

An internal release agent includes at least one phosphodiester represented by the following general formula (1). In the formula, Rand Rindependently represent a hydrocarbon group having 1 to 30 carbon atoms, which is optionally substituted with at least one hydroxyl group, and Rrepresents an alkylene group having 2 to 4 carbon atoms. A plurality of R's may be the same as or different from each other. M represents a hydrogen atom, an ammonium ion, an alkali metal ion, or a monovalent/divalent alkali earth metal ion, and n is an integer of 1 to 60.

Internal release agent, composition including internal release agent, and process for producing a plastic lens using same composition

Disclosed is a polymerizable composition for an optical material containing polyisocyanate (a) including aliphatic polyisocyanate (a1) and a modified aliphatic polyisocyanate (a2); and polythiol (b) having a di- or higher functional thiol group, in which the modified aliphatic polyisocyanate (a2) is contained in the polyisocyanate (a) in the amount of less than or equal to 60 weight %.

Polymerizable composition for optical material and optical material

There is provided a polymerizable composition for optical materials including (A) at least one kind of polythiols selected from 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, (B) polyisocyanate, and (C) at least one kind of ultraviolet absorbers having a maximum absorption peak in a range of 350 nm to 370 nm.

Polymerizable composition for optical materials

A process for producing an optical material of the present invention includes a step of mixing di- or higher-functional thiol compounds (A) having one or more sulfide bonds and/or one or more ester bonds with an imidazole-based curing catalyst (B) to prepare a mixed solution; a step of mixing the mixed solution with an isocyanate compound (C) including at least one kind of a di- or higher-functional alicyclic isocyanate compound (c1) and/or a di- or higher-functional aliphatic isocyanate compound (c2) to prepare a polymerizable composition for optical materials; a step of injecting the polymerizable composition for optical materials into a mold; and a step of polymerization-curing the polymerizable composition for optical materials in the mold.

Process for producing optical material

The optical material of the present invention contains one or more kinds of ultraviolet absorber (a) having a maximum absorption peak within a range of equal to or greater than 350 nm and equal to or less than 370 nm, in which a light transmittance of the optical material having a thickness of 2 mm satisfies the following characteristics (1) to (3),

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Omuta, Japan

Naoyuki Kakinuma