# US 11,077,641 B2 · Fireproof construction and method for using same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,641 B2 - Document ID: US11077641B2 - Status: Granted - Kind: B2 - Application number: 15/513,197 - Filed: 2015-08-26 - Published: 2017-10-19 - Granted: 2021-08-03 - Earliest claimed: 2014-09-22 - Assignees: Nichias Corporation - Applicants: Nichias Corporation - Inventors: Daisuke Tsumura; Akio Tsuzuku - Web page: https://patentgrep.com/patent/US11077641B2 ## CPC - B32B 5/18: characterised by features of a layer {of} foamed material - A62C 3/16: in electrical installations, e.g. cableways - B32B 18/00: Layered products essentially comprising ceramics, e.g. refractory products - C04B 35/80: Fibres, filaments, whiskers, platelets, or the like - C09K 21/04: containing phosphorus - E04B 1/76: specifically with respect to heat only (heat insulation in general F16L59/00) - E04B 1/94: against fire ({fire protection of partitions E04B2/7403, E04B2/7409; supporting constructions for ceilings having the capability of expansion in case of fire E04B9/08}; fire-fighting A62C, {e.g. fire prevention or containment A62C2/00}; impregnation of wood or similar materials B27K; {fireproof paints C09D5/18; fireproofing materials C09K21/00; flame-resistant papers D21H5/0002; coverings or linings, e.g. for walls or ceilings, in general E04F13/00}; fireproof doors E06B5/16; {firebreak devices for pipes or the like passing through walls F16L5/04; protection of pipes by means of non-inflammable material F16L57/04}) - F16L 59/02: Shape or form of insulating materials, with or without coverings integral with the insulating materials - G21D 1/00: Details of nuclear power plant (control G21D3/00) - G21D 3/04: Safety arrangements (emergency protection of reactor G21C9/00) - B32B 2307/304: Insulating - B32B 2307/3065: Flame resistant or retardant, fire resistant or retardant - B32B 2307/72: Density - B32B 2309/105: Thickness - C04B 2235/5232: Silica or silicates other than aluminosilicates, e.g. quartz - C04B 2237/341: Silica or silicates - C04B 2237/38: Fiber or whisker reinforced - Y02E 30/00: Energy generation of nuclear origin - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - A62C: FIRE-FIGHTING (fire-extinguishing compositions, use of chemical substances in extinguishing fires A62D1/00; spraying, applying liquids or other fluent materials to surfaces in general B05; alarm arrangements G08B, e.g. fire alarms actuated by smoke or gases G08B17/10) - 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 - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001}) - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL - G21D: NUCLEAR POWER PLANT - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A fireproof structure includes: a first heat-absorbing material that includes an inorganic porous formed body that has absorbed water, or a second heat-absorbing material that includes particles that include magnesium phosphate hydrate and a binder; and a fibrous heat-insulating material that includes inorganic fibers having a shrinkage ratio of 5% or less when allowed to stand at 1,100° C. for 24 hours. ## Claims ### Claim 1 A fireproof structure comprising: (i) a first heat-absorbing material that comprises an inorganic porous formed body that has absorbed water and is packed in a packing material that breaks at 70 to 130° C., the inorganic porous formed body being a formed body that comprises an inorganic powder composed of a calcium silicate, or (ii) a second heat-absorbing material that comprises particles that comprise magnesium phosphate hydrate and a binder; and a fibrous heat-insulating material that comprises inorganic fibers having a shrinkage ratio of 5% or less when allowed to stand at 1,100° C. for 24 hours. ### Claim 2 (depends on 1) The fireproof structure according to claim 1, wherein the binder included in the second heat-absorbing material is sodium silicate. ### Claim 3 (depends on 1) The fireproof structure according to claim 1, wherein the second heat-absorbing material is held by a heat-resistant cloth having a surface on which aluminum is deposited. ### Claim 4 (depends on 1) The fireproof structure according to claim 1, further comprising: a low-thermal-conductivity heat-insulating material that has a thermal conductivity at 400° C. of 0.05 W/(m·K) or less, wherein the heat-absorbing material, the low-thermal-conductivity heat-insulating material, and the fibrous heat-insulating material are provided in this order. ### Claim 5 (depends on 1) The fireproof structure according to claim 1, further comprising: a low-thermal-conductivity heat-insulating material that has a thermal conductivity at 400° C. of 0.05 W/(m·K) or less, wherein the low-thermal-conductivity heat-insulating material, the heat-absorbing material, and the fibrous heat-insulating material are provided in this order. ### Claim 6 (depends on 4) The fireproof structure according to claim 4, the fireproof structure being a laminate in which two or three members selected from the heat-absorbing material, the low-thermal-conductivity heat-insulating material, and the fibrous heat-insulating material are stacked, the laminate being packed in a package. ### Claim 7 (depends on 6) The fireproof structure according to claim 6, wherein the laminate is a combinable unit structure. ### Claim 8 (depends on 6) The fireproof structure according to claim 6, wherein the laminate has a density of 200 to 300 kg/m3. ### Claim 9 (depends on 6) The fireproof structure according to claim 6, wherein the laminate has a thickness of 100 to 150 mm. ### Claim 10 (depends on 4) The fireproof structure according to claim 4, wherein the low-thermal-conductivity heat-insulating material is a formed body that comprises inorganic particles that are silica particles, alumina particles, or a combination of silica particles and alumina particles, or a composite material that comprises an aerogel and inorganic fibers. ### Claim 11 (depends on 10) The fireproof structure according to claim 10, wherein the formed body that comprises the inorganic particles comprises one or more materials selected from reinforcing fibers and a radiation scattering material. ### Claim 12 (depends on 1) The fireproof structure according to claim 1, wherein the inorganic fibers having a shrinkage ratio of 5% or less when allowed to stand at 1,100° C. for 24 hours, are ceramic fibers, or bio-soluble fibers having a dissolution rate of 1% or more with respect to a physiological saline solution. ### Claim 13 (depends on 1) The fireproof structure according to claim 1, wherein, when a protection target is surrounded by the fireproof structure, and heated at 1,100° C. for 3 hours from the outside of the fireproof structure, the protection target that is situated inside the fireproof structure has a surface temperature of 170° C. or less. ### Claim 14 (depends on 1) A method for using the fireproof structure according to claim 1, comprising surrounding a protection target using the fireproof structure according to claim 1 so that the fibrous heat-insulating material is situated on the outer side. ### Claim 15 (depends on 14) The method according to claim 14, wherein the fireproof structure is provided to a surface of a structure.