Abstract: The present invention provides a resin composition for stereolithographic modeling emitting a weak odor, having desirable shape accuracy, and made into a cured product having desirable strength, toughness, and color tone when used for stereolithographic modeling. The present invention relates to a resin composition for stereolithographic modeling, comprising: a polymerizable monomer (A); a photopolymerization initiator (B), and an organic peroxide (C), wherein the polymerizable monomer (A) comprises a (meth)acrylic acid ester compound (A-1) having a viscosity of 1,000 mPa·s or less and a normal boiling point of 270° C. or more and/or a (meth)acrylamide compound (A-2) having a viscosity of 1,000 mPa·s or less and a normal boiling point of 200° C. or more, and the photopolymerization initiator (B) is at least one selected from a (bis)acylphosphine oxide, an ?-hydroxyketone compound, an ?-aminoketone compound, a benzoin alkyl ether compound, a thioxanthone, a ketal, an ?-diketone, and an anthraquinone.

Abstract: A teaching device for creating a control program for a robot includes: a screen generation unit which generates a program creation screen for creating a program via commands representing functions constituting the control program for the robot; and a related information display control unit which, in accordance with the selection of or an execute instruction for a command disposed in the program creation screen, displays information relating to the command subject to the selection or the execute instruction.

Abstract: A method for producing a chloroprene polymer composition containing a chloroprene polymer, the method including: a polymerization step of polymerizing a monomer containing chloroprene at a polymerization rate of 20% or more to obtain a polymer composition containing a chloroprene polymer; and a mixing step of mixing the polymer composition with a rosin containing at least one conjugate resin acid component selected from the group consisting of abietic acid, neoabietic acid, palustric acid, levopimaric acid, and salts thereof, in which a mixed amount of the rosin in the mixing step is more than 0 parts by mass and 23 parts by mass or less with respect to 100 parts by mass of solid content of the polymer composition.

Abstract: A method for manufacturing a chloroprene polymer composition, the method including: a polymerization step of polymerizing chloroprene in the presence of at least one rosin acid component selected from the group consisting of a rosin acid and a rosin acid salt to obtain a chloroprene polymer composition containing a chloroprene polymer, in which in the rosin acid component, a mass ratio B1/A1 of a total amount B1 of abietic acid, neoabietic acid, palustric acid, levopimaric acid, and salts thereof with respect to a total amount A1 of dehydroabietic acid, pimaric acid, isopimaric acid, dihydroabietic acid, and salts thereof is 0.10 to 3.00, and a toluene insoluble content of the chloroprene polymer is 50% by mass or more.

Abstract: The present invention provides an energy ray-curable coating material for three-dimensional shaped articles that provides excellent toughness in the cured product, and an energy ray-curable material kit for three-dimensional shaping including the coating material. The present invention relates to an energy ray-curable coating material (A) for three-dimensional shaped articles, comprising a polymerizable compound and a polymerization initiator (c), the polymerizable compound comprising a monofunctional polymerizable compound (a), and/or a polyfunctional polymerizable compound (b) having two or more polymerizable groups per molecule, the polyfunctional polymerizable compound (b) having a Mw/n of 120 or more, where Mw is a molecular weight of the polyfunctional polymerizable compound (b), and n is the number of polymerizable groups per molecule.

Abstract: 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.

Abstract: 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.

Abstract: The present invention provides a resin composition for stereolithography that excels in strength, toughness, and water resistance in the form of a shaped article. The present invention relates to a resin composition for stereolithography that comprises a urethanized (meth)acrylic compound (A), a (meth)acrylate compound (B) containing no urethane bond, and a photopolymerization initiator (C), the compound (A) being a urethanized (meth)acrylic compound (A-1) having a polymer structure, and/or a urethanized (meth)acrylic compound (A-2) having no polymer structure, the compound (A-1) having a weight-average molecular weight of less than 1,000, the compound (A-2) having a molecular weight of less than 1,000, the compound (B) comprising at least one selected from the group consisting of a (meth)acrylate compound (b-I) represented by general formula (I), and a (meth)acrylate compound (b-II) represented by general formula (II).

Abstract: A dental intraoral device that is worn within an oral cavity, the dental intraoral device comprising a resin base portion that follows a shape of the oral cavity. At least a part of the base portion is formed into a mesh shape. The part of the base portion is preferably formed by approximately regularly arranging unit regions having holes.

Abstract: A dental intraoral device that is worn within an oral cavity, the dental intraoral device comprising a resin tooth portion. At least a part of the tooth portion is formed into a mesh shape. The part of the tooth portion is preferably formed by approximately regularly arranging unit regions having holes.

Abstract: The present invention provides a resin composition for stereolithography that enables easy stereolithographical fabrication; and that can produce a cured object having desirable strain recovery, desirable toughness, and desirable water resistance. The present invention relates to a resin composition for stereolithography comprising a polymerizable compound (A) whose homopolymer has a glass transition temperature (Tg) of 37° C. or higher; and a photopolymerization initiator (B), and having a tan ? at 37° C. of 0.3 or less after cure.

Abstract: A method for manufacturing a mouthpiece, wherein the mouthpiece is to be placed within an oral cavity to cover teeth and manufactured by an additive manufacturing device, the method including performing additive manufacturing for manufacturing a manufactured product that comprises the mouthpiece, a peripheral portion connected to the mouthpiece, and a support configured to support the peripheral portion, acid removing the peripheral portion from the manufactured product.

Abstract: A resin composition for stereolithography may emit a weak odor, enable easy fabrication of an object, and may be made into a cured product having desirable toughness and water resistance when used for stereolithographical fabrication. A resin composition for stereolithography may include: an ?,?-unsaturated double bond group-containing compound (A) having a homopolymer glass transition temperature (Tg) of 40° C. or more, having a plurality of independent aromatic rings, and having no urethane bond; an ?,?-unsaturated double bond group-containing compound (B) having a homopolymer glass transition temperature (Tg) of less than 40° C., having a ring structure, and having a normal boiling point of 250° C. or more; and a photopolymerization initiator (C).

Abstract: The present invention provides a resin composition for stereolithographic modeling emitting a weak odor, having desirable shape accuracy, and made into a cured product having desirable strength, toughness, and color tone when used for stereolithographic modeling. The present invention relates to a resin composition for stereolithographic modeling, comprising: a polymerizable monomer (A); a photopolymerization initiator (B), and an organic peroxide (C), wherein the polymerizable monomer (A) comprises a (meth)acrylic acid ester compound (A-1) having a viscosity of 1,000 mPa·s or less and a normal boiling point of 270° C. or more and/or a (meth)acrylamide compound (A-2) having a viscosity of 1,000 mPa·s or less and a normal boiling point of 200° C. or more, and the photopolymerization initiator (B) is at least one selected from a (bis)acylphosphine oxide, an ?-hydroxyketone compound, an ?-aminoketone compound, a benzoin alkyl ether compound, a thioxanthone, a ketal, an ?-diketone, and an anthraquinone.

Abstract: A method for manufacturing a mouthpiece includes manufacturing the mouthpiece that is to be placed within an oral cavity to cover teeth by an additive manufacturing device and laminating hardened layers not to form an annular lamination trace in a buccal portion that covers a buccal surface of a front tooth.

Abstract: A resin composition for optical shaping comprising: an ?,?-unsaturated double bond group-containing compound (A) having a ring structure (a) containing a nitrogen atom; a (meth)acrylic acid ester compound (B) having a boiling point of 280° C. or more at normal pressure, having a carbocyclic group, and having no nitrogen-containing heterocyclic group; a photopolymerization initiator (C); and optionally, a polyfunctional polymerizable monomer (E) having a molecular weight of 500 or less and not comprised in the ?,?-unsaturated double bond group-containing compound (A) and the (meth)acrylic acid ester compound (B), wherein the content of the polyfunctional polymerizable monomer (E) having a molecular weight of 500 or less is 20 mass % or less relative to the total amount of polymerizable compounds comprised in the resin composition for optical shaping.

Abstract: 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.

Abstract: To provide an oil degradation determining device for an internal combustion engine, which is able to determine degradation of oil accurately regardless of a driving state of a vehicle. An EFI-ECU 41 estimates an amount of sludge precursor accumulated in an oil pan 4 based on temperature of an engine 1 and an injection quantity. Particularly, the EFI-ECU 41 calculates an amount of fuel injected in a combustion chamber 7 of the engine 1 per certain detection period including detection time, estimates an amount of sludge precursor accumulated in the oil pan 4 based on a calculated value of the accumulation amount of sludge precursor per unit amount of fuel, which is calculated based on current temperature of the engine 1, and a calculated value of the amount of fuel injected in the detection period from previous detection time until current detection time, and judges that engine oil O is degraded when the accumulation amount of the sludge precursor becomes a certain value or above.