# US 2020/0399441 A1 · Particle material and manufacturing method therefor, and transparent resin composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0399441 A1 - Document ID: US20200399441A1 - Status: Published application - Kind: A1 - Application number: 17/005,619 - Filed: 2020-08-28 - Published: 2020-12-24 - Earliest claimed: 2018-03-02 - Assignees: Admatechs Co., Ltd. - Applicants: Admatechs Co., Ltd. - Inventors: Kenta HORI; Takeshi YANAGIHARA; Sachie NAGANO; Susumu ABE; Yuji OONO; Haruka KATSURAYAMA - Web page: https://patentgrep.com/patent/US20200399441A1 ## CPC - C08K 9/02: Ingredients treated with inorganic substances - A61K 6/831: comprising non-metallic elements or compounds thereof, e.g. carbon - C01F 7/02: Aluminium oxide; Aluminium hydroxide; Aluminates - C04B 41/49: Compounds having one or more carbon-to-metal or carbon-to-silicon linkages {; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters (to obtain SiO2C04B41/5089, C04B41/5035); Organo-phosphorus compounds; Organo-inorganic complexes} - C04B 41/50: with inorganic materials - C08K 3/22: of metals - C08K 3/36: Silica - C08K 5/5403: {containing no other elements than carbon or hydrogen} - C08K 9/06: with silicon-containing compounds - C08L 101/00: Compositions of unspecified macromolecular compounds - C09D 7/61: inorganic - C09D 201/00: Coating compositions based on unspecified macromolecular compounds - H10W 74/10: characterised by their shape or disposition - H10W 74/40: characterised by their materials - C08K 2003/2227: {of aluminium} - C08K 2201/005: Additives being defined by their particle size in general - C08K 2201/006: Additives being defined by their surface area - C08K 2201/011: Nanostructured additives - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D) - C01F: COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts of peroxyacids C01B15/00; sulfides or polysulfides of magnesium, calcium, strontium, or barium C01B17/42; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds other than ammonia or cyanogen containing nitrogen and non-metals and optionally metals C01B21/082; amides or imides of silicon C01B21/087}; metal {imides or} amides C01B21/092, {C01B21/0923}; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanic acid C01C3/14; salts of cyanamide C01C3/16; thiocyanates C01C3/20; {double sulfates of magnesium with sodium or potassium C01D5/12; with other alkali metals C01D15/00, C01D17/00}) - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract Provided is a particle material that achieves excellent mechanical properties and optical properties when dispersed in a transparent resin material in order to solve the problem. In a case where primary particles having particle sizes in a certain range are formed into an aggregate, mechanical properties are enhanced while optical properties are maintained. The primary particles each have compositions different between the inside thereof and the surface thereof. Therefore, the optical properties to be obtained are easily controlled unlike an inorganic substance in which both of the compositions are mixed at an atomic level. The particle material of the present invention is an aggregate including primary particles in which a specific surface area. diameter is not less than 0.8 nm and not greater than 80 nm, the primary particles formed of an inorganic substance in which a composition of a surface and a composition of an inside are different. ## Claims ### Claim 1 A particle material comprising an aggregate used so as to be dispersed in a transparent resin material, the aggregate including primary particles in which a specific surface area diameter based on a surface communicating with outside is not less than 0.8 nm and not greater than 80 nm, the primary particles formed of an inorganic substance in which a composition of a surface and a composition of an inside are different from each other, the aggregate beings formed by binding and fusing particles through dehydration and condensation, wherein a volume average particle diameter in the aggregate is greater than 0.1 μm, the composition of the surface has a refractive index different from that of the composition of the inside, an existence ratio between the composition of the surface and the composition of the inside is determined such that a hardened product which is obtained by dispersing and hardening 10 parts by mass of the aggregate in 100 parts by mass of the transparent resin material and which has a thickness of 2 mm, has a transmittance (wavelength 400 nm) of not less than 80%, the primary particles each have the inside formed of boehmite or γ alumina and the surface formed of silica, and the particle material does not include a particle material in which a volume average particle diameter is not less than 6 nm and not greater than 0.2 μm. ### Claim 2 A particle material comprising an aggregate used so as to be dispersed in a transparent resin material, the aggregate including primary particles in which a specific surface area diameter based on a surface communicating with outside is not less than 0.8 nm and not greater than 80 nm, the primary particles formed of an inorganic substance in which a composition of a surface and a composition of an inside are different from each other, the aggregate being formed by binding and fusing particles through dehydration and condensation, wherein a volume average particle diameter in the aggregate is greater than 0.1 μm, the composition of the surface has a refractive index different from that of the composition of the inside, an existence ratio between the composition of the surface and the composition of the inside is determined such that hardened product which is obtained be dispersing and hardening 10 parts by mass of the aggregate in 100 parts by mass of the transparent resin material and which has a thickness of 2 mm, has a transmittance (wavelength 400 nm) of not less than 80%, the primary particles each have the inside formed of boehmite or γ alumina and the surface formed of silica, and the aggregate includes second particles formed of an oxide of an element that has an atomic number of 38 or higher. ### Claim 3 (depends on 1) The particle material according to claim 1, wherein the volume average particle diameter in the aggregate is not less than 0.5 μm and not greater than 500 μm. ### Claim 4 (depends on 2) The particle material according to claim 2, wherein the volume average particle diameter in the aggregate is not less than 0.5 μm and not greater than 500 μm. ### Claim 5 (depends on 1) The particle material according to claim 1, comprising a coating layer formed of an organic substance for covering surfaces of the primary particles, wherein the coating layer binds to the surfaces of the primary particles through covalent bond or by an intermolecular force. ### Claim 6 (depends on 2) The particle material according to claim 2, comprising a coating layer formed of an organic substance for covering surfaces of the primary particles, wherein the coating layer binds to the surfaces of the primary particles through covalent bond or by an intermolecular force. ### Claim 7 (depends on 5) The particle material according to claim 5, wherein the organic substance is a condensation product of a silane compound. ### Claim 8 (depends on 6) The particle material according to claim 6, wherein the organic substance is a condensation product of a silane compound. ### Claim 9 (depends on 1) A manufacturing method for manufacturing the particle material according to claim 1, the manufacturing method comprising: for forming the primary particles in which the inside is formed of γ alumina, a dispersing step of dispersing, in a liquid dispersion medium, core particles having a composition formed of γ alumina, to form a dispersion liquid; a coating step of causing reaction of a precursor formed of a silane compound or adhering a colloidal silica after the precursor or the colloidal silica is dissolved in the dispersion liquid, to coat the core particles and form coated particles; and an aggregating step of forming an aggregate by heating the coated particles up to a temperature of not lower than 900° C., and subjecting the coated particles to dehydration and condensation and forming silica to bind and fuse particles. ### Claim 10 (depends on 1) A manufacturing method for manufacturing the particle material according to claim 1, the manufacturing method comprising: for forming the primary particles in which the inside is formed of boehmite, a dispersing step of dispersing, in a liquid dispersion medium, core particles having a composition formed of boehmite, to form a dispersion liquid; a coating step of causing reaction of a precursor formed of a silane compound or adhering a colloidal silica after the precursor or the colloidal silica is dissolved in the dispersion liquid, to coat the core particles and form coated particles; and an aggregating step of forming an aggregate by heating the coated particles up to a temperature of not lower than 250° C., and subjecting the coated particles to dehydration and condensation and forming silica to bind and fuse particles. ### Claim 11 (depends on 9) The manufacturing method according to claim 9 for manufacturing the particle material, the manufacturing method comprising a modifying step of performing modification by bringing a silane compound into contact with the surface after the coating step. ### Claim 12 (depends on 10) The manufacturing method according to claim 10 for manufacturing the particle material, the manufacturing method comprising a modifying step of performing modification by bringing a silane compound into contact with the surface after the coating step. ### Claim 13 (depends on 1) A transparent resin composition comprising: the particle material according to claim 1; and a transparent resin material in which the particle material is dispersed. ### Claim 14 (depends on 2) A transparent resin composition comprising: the particle material according to claim 2; and a transparent resin material in which the particle material is dispersed. ### Claim 15 (depends on 7) A transparent resin composition comprising: the particle material according to claim 7; and a transparent resin material in which the particle material is dispersed. ### Claim 16 (depends on 8) A transparent resin composition comprising: the particle material according to claim 8; and a transparent resin material in which the particle material is dispersed.