Mitsui Chemicals, Inc.

Mai Kimura

Toshikazu Sakamaki

Hirohisa Shiode

Kouya Kojima

Hiroki Murai

Takashi Koura

Takaaki Hayashi

Suguru Endo

Toshikazu Gomi

Eiji Kobayashi

A photocurable composition, wherein: in a case in which a rectangular sheet-like test piece Pwith a length of 40 mm, a width of 10 mm, and a thickness of 0.5 mm is produced by photomodeling under specific conditions, and a storage modulus is measured for the thus produced test piece Pby dynamic viscoelastic measurement with a measurement frequency of 1 Hz while increasing a temperature in a range of from 25° C. to 300° C. at a rate of 3° C./min, the storage modulus at 135° C. is 3.0×10Pa or more.

Photocurable composition, three-dimensional modeling product, and dental product

A photocurable composition includes a photopolymerizable component and a photopolymerization initiator. When a test piece with 39 mm length, 8 mm width, and 4 mm thickness, is produced by photofabrication under conditions in which the photocurable composition is irradiated with visible light having 405 nm wavelength at 12 mJ/cmirradiation dose to form a cured layer with 100 m thickness, the cured layer is stacked in a thickness direction thereof to form a rectangular fabrication product with 39 mm length, 8 mm width, and 4 mm thickness, and the fabrication product is irradiated with ultraviolet rays having 365 nm wavelength at 10 J/cmirradiation dose to produce the test piece, a total fracture work of the test piece measured in compliance with ISO20795-1:2008 is 1100 J/mor more.

Photocurable composition, cured product, and dental product

A photocurable composition for manufacturing a dental prosthesis by stereolithography, including: a photopolymerization initiator; and a (meth)acrylic monomer component including an acrylic monomer (X) having no aromatic rings and having a ring structure other than an aromatic ring and two or more acryloyloxy groups in one molecule and having an Mw of from 200 to 800, and at least one of a (meth)acrylic monomer (A) having one or more ether bonds and two (meth)acryloyloxy groups in one molecule and having a defined Mw, a (meth)acrylic monomer (B) having a ring structure other than an aromatic ring and one (meth)acryloyloxy group in one molecule and having a defined Mw, a (meth)acrylic monomer (C) having a hydrocarbon skeleton and two (meth)acryloyloxy groups in one molecule and having a defined Mw, and a (meth)acrylic monomer (D) having one or more aromatic rings and one (meth)acryloyloxy group in one molecule and having a Mw.

Photocurable composition, denture base, and plate denture

The present invention provides a photocurable composition which is used for the production by stereolithography of a dental prosthesis or the like. This photocurable composition contains a (meth)acrylic monomer component and a photopolymerization initiator; and the (meth)acrylic monomer component contains: an acrylic monomer (X) containing, within one molecule, two aromatic rings and two acryloyloxy groups, and having a Mw of from 400 to 580; and at least one of: a (meth)acrylic monomer (A) containing, within one molecule, one or more ether bonds and two (meth)acryloyloxy groups, and having a Mw of from 200 to 400; a (meth)acrylic monomer (B) not containing, within one molecule, a ring structure other than an aromatic ring and one (meth)acryloyloxy group, and having a Mw of from 130 to 240; or a (meth)acrylic monomer (C) containing, within one molecule, a hydrocarbon skeleton and two (meth)acryloyloxy groups, and having a Mw of from 190 to 280.

Provided is a photocurable composition including a monomer component including: a monomer (X) containing, within one molecule, two aromatic rings and two (meth)acryloyloxy groups, and having an Mw of from 400 to 580, and a monomer (H) containing, within one molecule, at least one of a hydroxyl group or a carboxy group, and a (meth)acryloyloxy group, and having an Mw of from 100 to 700; and a photopolymerization initiator. The composition has a functional group value (a) of from 0.5&#xd7;10to 2.0&#xd7;10mol/g.Functional group value ()=()&#xd7;&#x2003;&#x2003;Formula (a)wherein nrepresents the total number of hydroxyl groups and carboxy groups contained in one molecule of the (meth)acrylic monomer (H); Mrepresents the Mw of the (meth)acrylic monomer (H); and Prepresents the mass ratio of the (meth)acrylic monomer (H) with respect to the total amount of the (meth)acrylic monomer component.

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Ichihara, Japan

Mai Kimura