Abstract: To provide a composite for a dental pattern resin whose shrinkage when curing and expansion when heated can be both suppressed as its usability is kept, the composite for a dental pattern resin includes a liquid formulation and a powder formulation, wherein the liquid formulation includes a polymerizable monofunctional (meth)acrylate, a polymerizable polyfunctional (meth)acrylate, and a polymerization accelerator, and the powder formulation includes more than 5 mass % of a (meth)acrylate copolymer on the basis of the total powder formulation.

Abstract: Provided is a powder formulation for a dental composite which prevents aggregation, makes it easy to be obtained by a proper amount, and makes it possible to suppress formation of incineration residues after mixed with a liquid formulation for a dental composite to form resin. The powder formulation includes a flowability-improving agent in the form of powder, the flowability-improving agent being comprising polymethyl (meth)acrylate, the flowability-improving agent having a volume median particle diameter of 0.02 ?m to 50 ?m.

Abstract: Provided is a block body that makes it possible to quickly produce a dental prosthesis with a good accuracy. A material of the block body including SiO2 in an amount of 60.0 mass % to 80.0 mass %, Li2O in an amount of 10.0 mass % to 20.0 mass %, Al2O3 in an amount of 5.1 mass % to 10.0 mass %, wherein the block body is formed in a column, and a main crystalline phase of the block body is lithium disilicate.

Abstract: Provided is a method for quickly producing a dental prosthesis with a good accuracy. The method for producing a dental prosthesis including: a melting step of melting a material including no less than 60.0 mass % and no more than 80.0 mass % of SiO2, no less than 10.0 mass % and no more than 20.0 mass % of Li2O, and no less than 5.1 mass % and no more than 10.0 mass % of Al2O3; a glass blank production step of cooling to solidify the molten material to obtain a glass blank; a lithium disilicate blank production step of heating the glass blank to obtain a lithium disilicate blank whose main crystalline phase is lithium disilicate; and a processing step of processing the lithium disilicate by machining.

Abstract: A wax pattern surface-treating agent includes a solvent, boron nitride, and at least one surfactant selected from a group consisting of an anionic surfactant, a cationic surfactant, a non-ionic surfactant, and an amphoteric surfactant.

Abstract: Provided is a dental investment that is a dental phosphate-bonded investment including boron nitride at 0.1% to 5% by weight.

Abstract: An object is to provide a method for manufacturing a dental prosthesis consisting of a plurality of layers with high productivity. The method for manufacturing a dental prosthesis comprises: filling a cavity (21a) formed in a mold which has a shape of the dental prosthesis with a layered material body (23) that is made by layering materials (23a, 23b) corresponding to the plurality of layers; and after this filling, rotating the mold on a material inlet (21b) of the mold and cutting the materials.

Abstract: In order to provide a material for forming a dental prosthesis which does not require further heat treatment after machining and can improve cutting ability even after obtaining necessary strength, the material for a dental prosthesis comprises 60.0 mass % or more and 80.0 mass % or less of SiO2, 10.0 mass % or more and 20.0 mass % or less of Li2O, and 5.1 mass % or more and 10.0 mass % or less of Al2O3.

Abstract: A polishing jig for machining tools which makes it possible for a deteriorating machining tool to be used again without detaching the machining tool, with which a processing machine is quipped, from the processing machine is provided. The polishing jig for machining tools comprises an attachment part to be attached to a processing machine; and a polishing face that is at least part of a surface of the polishing jig, the polishing face adapted to polish a processing part of a machining tool.

Abstract: Providing a surface treatment agent for a wax pattern containing solvent; boron nitride; and a surface-active agent.

Abstract: Provided is a method for quickly producing a dental prosthesis with a good accuracy. The method for producing a dental prosthesis including: a melting step of melting a material including no less than 60.0 mass % and no more than 80.0 mass % of SiO2, no less than 10.0 mass % and no more than 20.0 mass % of Li2O, and no less than 5.1 mass % and no more than 10.0 mass % of Al2O3; a glass blank production step of cooling to solidify the molten material to obtain a glass blank; a lithium disilicate blank production step of heating the glass blank to obtain a lithium disilicate blank whose main crystalline phase is lithium disilicate; and a processing step of processing the lithium disilicate by machining.

Abstract: Provided is a method for quickly producing a dental prosthesis with a good accuracy. The method for producing a dental prosthesis including: a melting step of melting a material including no less than 60.0 mass % and no more than 80.0 mass % of SiO2, no less than 10.0 mass % and no more than 20.0 mass % of Li2O, and no less than 5.1 mass % and no more than 10.0 mass % of Al2O3; a glass blank production step of cooling to solidify the molten material to obtain a glass blank; a lithium disilicate blank production step of heating the glass blank to obtain a lithium disilicate blank whose main crystalline phase is lithium disilicate; and a processing step of processing the lithium disilicate by machining.

Abstract: An object is to provide a method for manufacturing a dental prosthesis consisting of a plurality of layers with high productivity. The method for manufacturing a dental prosthesis comprises: filling a cavity (21a) formed in a mold which has a shape of the dental prosthesis with a layered material body (23) that is made by layering materials (23a, 23b) corresponding to the plurality of layers; and after this filling, rotating the mold on a material inlet (21b) of the mold and cutting the materials.

Abstract: Provided is a method for quickly producing a dental prosthesis with a good accuracy. The method for producing a dental prosthesis including: a melting step of melting a material including no less than 60.0 mass % and no more than 80.0 mass % of SiO2, no less than 10.0 mass % and no more than 20.0 mass % of Li2O, and no less than 5.1 mass % and no more than 10.0 mass % of Al2O3; a glass blank production step of cooling to solidify the molten material to obtain a glass blank; a lithium disilicate blank production step of heating the glass blank to obtain a lithium disilicate blank whose main crystalline phase is lithium disilicate; and a processing step of processing the lithium disilicate by machining.

Abstract: Provided is a vinyl chloride-based resin composition including a vinyl chloride-based resin and a titanium dioxide having an average particle diameter of 5 to 50 nm, in an amount of 1,000 ppm to 10,000 ppm, by mass, relative to the mass of the vinyl chloride-based resin. By adding a titanium dioxide having an average particle diameter of 5 to 50 nm to a vinyl chloride-based resin in an amount described above, a vinyl chloride-based resin composition of excellent thermal stability can be obtained. In the vinyl chloride-based resin composition, the crystalline form of the titanium dioxide is preferably anatase, rutile, or a combination thereof.

Abstract: A thermally expandable vinyl chloride resin composition is provided. It includes (A) 100 parts by mass of a vinyl chloride resin, (B) 5 to 200 parts by mass of an inorganic filler, (C) 10 to 300 parts by mass of a thermally expandable graphite, (D) 0.1 to 10 parts by mass of a fluororesin, and (E) 10 to 300 parts by mass of a phosphorus compound. The composition exhibits favorable thermal expansion properties and favorable shape retention following thermal expansion upon exposure to high temperatures.

Abstract: The present invention provides an antistatic agent for vinyl chloride-based resins which can impart superior antistatic properties to the vinyl chloride-based resin, and which can thereby solve various problems arising from charging of the vinyl chloride-based resin with static electricity, a vinyl chloride-based resin composition containing this antistatic agent, and a method for manufacturing this composition. The present invention provides an antistatic agent for vinyl chloride-based resins which consists of silica particles containing at least 99.0% by mass of SiO2 and 0.00005% 80.5 ppm by mass or less of sodium, and which has such a particle size distribution that at least 98% by mass of the silica particles is occupied by the particles having a particle diameter in the range from 30 to 1,000 nm.

Abstract: A thermally expandable vinyl chloride resin composition is provided. It includes (A) 100 parts by mass of a vinyl chloride resin, (B) 5 to 200 parts by mass of an inorganic filler, (C) 10 to 300 parts by mass of a thermally expandable graphite, (D) 0.1 to 10 parts by mass of a fluororesin, and (E) 10 to 300 parts by mass of a phosphorus compound. The composition exhibits favorable thermal expansion properties and favorable shape retention following thermal expansion upon exposure to high temperatures.

Abstract: The present invention provides an antistatic agent for vinyl chloride-based resins which can impart superior antistatic properties to the vinyl chloride-based resin, and which can thereby solve various problems arising from charging of the vinyl chloride-based resin with static electricity, a vinyl chloride-based resin composition containing this antistatic agent, and a method for manufacturing this composition. The present invention provides an antistatic agent for vinyl chloride-based resins which consists of silica particles containing at least 99.0% by mass of SiO2 and 0.00005% 80.5 ppm by mass or less of sodium, and which has such a particle size distribution that at least 98% by mass of the silica particles is occupied by the particles having a particle diameter in the range from 30 to 1,000 nm.

Abstract: A flexible metal foil-polyimide laminate is prepared by joining a polyimide film to a metal foil via an intervening adhesive layer. The adhesive is a mixture of polyamic acids: (A) the reaction product of 3,4,3?,4?-biphenyltetracarboxylic anhydride with p-phenylenediamine, (B) the reaction product of 3,4,3?,4?-biphenyltetracarboxylic anhydride with 4,4?-diaminodiphenyl ether, and (C) the reaction product of pyromellitic dianhydride with 4,4?-diaminodiphenyl ether, in a weight ratio (A+B)/C between 75/25 and 25/75. The method is simple and inexpensive, and yields a flexible metal foil-polyimide laminate that is improved in peel strength and curling resistance while maintaining the heat resistance of polyimide.