# US 10,119,775 B2 · High-performance heat-insulating materials > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,119,775 B2 - Document ID: US10119775B2 - Status: Granted - Kind: B2 - Application number: 14/232,440 - Filed: 2012-07-12 - Published: 2014-06-19 - Granted: 2018-11-06 - Earliest claimed: 2011-07-13 - Assignees: Saint-Gobain Isover - Applicants: Alexandra Dekoninck; Nikolai Denkov Denkov; Ivan Igorov Lesov; Slavka Stoyanova Tcholakova; Konstantin Nikolaev Golemanov - Inventors: Alexandra Dekoninck; Nikolai Denkov Denkov; Ivan Igorov Lesov; Slavka Stoyanova Tcholakova; Konstantin Nikolaev Golemanov - Web page: https://patentgrep.com/patent/US10119775B2 ## CPC - F28F 21/06: of plastics material - B29C 44/02: for articles of definite length, i.e. discrete articles - C04B 38/0064: {Multimodal pore size distribution} - C08J 9/0066: {Use of inorganic compounding ingredients} - C08J 9/30: by mixing gases into liquid compositions or plastisols, e.g. frothing with air - C04B 2111/28: Fire resistance, i.e. materials resistant to accidental fires or high temperatures - C04B 2201/20: for the density - C08J 2205/042: Nanopores, i.e. the average diameter being smaller than 0,1 micrometer - C08J 2205/044: Micropores, i.e. average diameter being between 0,1 micrometer and 0,1 millimeter - C08J 2205/048: Bimodal pore distribution, e.g. micropores and nanopores coexisting in the same foam - Y02W 30/91: Use of waste materials as fillers for mortars or concrete - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - 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 - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT ## Abstract The present invention relates to a heat-insulating material, in particular in the form of a solid foam, based on silica particles of submicron porosity, this material incorporating two different ranges of porosities, advantageously including a first range consisting of (macro)pores with diameters of between 10 microns and 3 mm, and a second range consisting of submicron pores with diameters greater than 4 nm and less than 300 nm, the pore volume of said submicron pores being at least 1 cm3/g and the mass per unit volume of said insulating material being less than 300 kg/m3, and also relates to the process for obtaining the same. ## Claims ### Claim 1 A heat-insulating material, formed from silica particles of submicron porosity, wherein the heat-insulating material is a solid silica foam incorporating two different ranges of porosities, including: a first range of macropores with diameters of between 10 microns and 3 mm; and a second range of submicron pores with diameters greater than 4 nm and less than 300 nm, wherein the pore volume for the submicron pores ranges from 1 to 1.5 cm3/g, and the pore volume for the macropores is from 3 to 15 cm3/g, wherein the heat-insulating material has a mass per unit volume of the heat-insulating material is less than 300 kg/m3, and wherein the silica particles of submicron porosity do not comprise aerogels, the silica particles of submicron porosity have submicron pores with diameters of greater than 4 nm, and the silica particles of submicron porosity have a specific surface area less than or equal to 500 m2/g. ### Claim 2 (depends on 1) The heat-insulating material of claim 1, wherein the heat-insulating material is obtained from a mixture comprising: water or an aqueous foam, silica particles of submicron porosity, incorporated into the aqueous foam or the water in the form of a dispersion/suspension, the silica particles having a specific surface area S of greater than 5 m2/g, and, optionally an organic binder and/or a mineral binder, and/or a surfactant and/or a pore-forming agent and/or a reinforcement. ### Claim 3 (depends on 1) The heat-insulating material of claim 1, wherein the silica particles are based on an amorphous silica. ### Claim 4 (depends on 1) The heat-insulating material of claim 1, wherein the heat-insulating material has a heat conductivity of less than 40 mW/m·K. ### Claim 5 (depends on 1) A heat insulation for buildings, comprising the heat-insulating material of claim 1. ### Claim 6 (depends on 2) The heat-insulating material of claim 2, wherein the silica particles having a specific surface area S is greater than 50 m2/g. ### Claim 7 (depends on 3) The heat-insulating material of claim 3, wherein the amorphous particles are precipitate silica, pyrogenic silica, fumed silica or a silica gel. ### Claim 8 (depends on 1) The heat-insulating material of claim 1, wherein the pore volume for the macropores is in a range of from 5 to 15 cm3/g. ### Claim 9 (depends on 4) The heat-insulating material of claim 4, wherein the heat-insulating material has a heat conductivity of less than 25 mW/m·K. ### Claim 10 (depends on 1) The heat-insulating material of claim 1, wherein the silica particles of submicron porosity have a specific surface area greater than 5 m2/g. ### Claim 11 (depends on 1) The heat-insulating material of claim 1, wherein the silica particles of submicron porosity have a specific surface area greater than 30 m2/g. ### Claim 12 (depends on 1) The heat-insulating material of claim 1, wherein the silica particles of submicron porosity have submicron pores with diameters of greater than 7 nm.