# US 2021/0331973 A1 · Insulation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0331973 A1 - Document ID: US20210331973A1 - Status: Published application - Kind: A1 - Application number: 16/317,986 - Filed: 2017-07-14 - Published: 2021-10-28 - Earliest claimed: 2016-07-15 - Assignees: Knauf Insulation SPRL - Applicants: Knauf Insulation Sprl - Inventors: Etienne DHEUR - Web page: https://patentgrep.com/patent/US20210331973A1 ## CPC - C04B 14/46: Rock wool {; Ceramic or silicate fibres (C04B14/40, C04B14/42 take precedence)} - C03C 13/00: Fibre or filament compositions (manufacture of fibres or filaments C03B37/00) - C03C 25/00: Surface treatment of fibres or filaments made from glass, minerals or slags - C03C 25/26: Macromolecular compounds or prepolymers - C04B 14/42: Glass - C04B 28/344: {the phosphate binder being present in the starting composition solely as one or more phosphates} - D04H 1/4209: Inorganic fibres - D04H 1/4218: Glass fibres - E04B 1/7675: {Insulating linings for the interior face of exterior walls} - 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}) - C04B 2111/00163: {by the dry process} - C04B 2111/00525: {for metallic surfaces} - C04B 2111/00551: {Refractory coatings, e.g. for tamping} - C04B 2111/00577: {applied by spraying} - C04B 2111/28: Fire resistance, i.e. materials resistant to accidental fires or high temperatures - C04B 2201/30: for heat transfer properties such as thermal insulation values, e.g. R-values - D10B 2401/04: Heat-responsive characteristics - E04B 1/7604: {fillings for cavity walls} - 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 - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B) - 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}) - D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES ## Abstract A mineral wool insulating product which comprises a layer, notably a continuous layer, of mixed mineral wool fibres, the mixed mineral wool fibres comprising a binder, first mineral wool fibres and second mineral wool fibres, the first mineral wool fibres and the second mineral wool fibres have a difference of softening point. ## Claims ### Claim at position 1 -15. (canceled) ### Claim 16 A method of providing a fire resistant layer to a support surface of a building element comprising: introducing a combination of first mineral wool fibres having a first composition and second mineral fibres having a second composition into an inlet of a spraying apparatus, the first mineral wool fibres and the second mineral wool fibres having a difference of softening point which is at least 150° C.; and projecting simultaneously the first mineral wool fibres, the second mineral wool fibres, water and a binder from a spraying nozzle of the spraying apparatus towards the support surface to provide a sprayed layer of mixed mineral wool fibres on the support surface, the sprayed layer of mixed mineral wool fibres comprising (in % by weight based on the total weight of the layer): the binder; at least 50% wt of the first mineral wool fibres; and at least 5% wt of the second mineral wool fibres. ### Claim 17 (depends on 16) The method of claim 16, wherein the first mineral wool fibres and the second mineral wool fibres having a difference of softening point which is at least 250° C. ### Claim 18 (depends on 16) The method of claim 16, wherein the first mineral wool fibres comprise glass wool fibres and the second mineral wool fibres are selected from the group consisting of rock wool fibres, slag wool, ceramic fibres and combination thereof. ### Claim 19 (depends on 16) The method of claim 16, wherein the method further comprises applying a primer bonding layer on the support surface before projecting the layer of mixed mineral wool fibres. ### Claim 20 (depends on 16) The method of claim 16, wherein the sprayed layer of mixed mineral wool fibres comprises between 3 and 8% wt of binder with respect to the total weight of the layer. ### Claim 21 (depends on 16) The method of claim 16, wherein the sprayed layer of mixed mineral wool fibres provides an additional fire resistance to a building element of at least 20 minutes, in accordance to at least one of EN 1363-1, EN 1365 and EN 13381 to the building element. ### Claim 22 (depends on 16) The method of claim 16, wherein the sprayed layer of mixed mineral wool fibres has a fire reaction classification of at least B, in accordance with EN 13501-1. ### Claim 23 (depends on 16) The method of claim 16, wherein the sprayed layer of mixed mineral wool fibres has a thickness in the range 30 mm to 210 mm. ### Claim 24 (depends on 16) The method of claim 16, wherein the sprayed layer of mixed mineral wool fibres has a density in the range 50 kg/m3 to 100 kg/m3. ### Claim 25 (depends on 16) The method of claim 16, wherein the support surface is selected from a ceiling of a crawl space, a wall of a crawl space, a ceiling of a cellar, a wall of a cellar, a ceiling a car park, a wall of a car park, a ceiling of a building, a wall of a building, a ceiling of a domestic house, a wall of a domestic house, a metal beam of a building, a metal column of a building, a vertical load-bearing metal beam, and a horizontal load-bearing metal beam. ### Claim 26 (depends on 16) The method of claim 16, wherein the sprayed layer of mixed mineral wool fibres provides a fire-resistant layer to a support surface selected from wood, metal, gypsum, plaster and concrete. ### Claim 27 A method of providing a fire resistant layer to a support surface of a building element, the method comprising: providing a package comprising a combination of loose glass wool fibres and loose stone wool fibres; introducing the content of the package into an inlet of a spraying apparatus; applying a primer bonding layer on the support surface; and subsequently projecting simultaneously the combination of loose glass wool fibres and loose stone wool fibres, water and a binder from a spraying nozzle of the spraying apparatus towards the support surface to provide a sprayed layer of mixed mineral wool fibres on the support surface, the sprayed layer of mixed mineral wool fibres comprising (in % by weight based on the total weight of the layer): the binder; at least 50% wt of the glass wool fibres; and at least 5% wt of the stone wool fibres. ### Claim 28 (depends on 27) The method of claim 27, in which the package comprises at least 60% wt of loose glass wool fibres and at least 10% of loose stone wool fibres. ### Claim 29 (depends on 28) The method of claim 28, in which the package comprises at least 20% wt of loose stone wool fibres. ### Claim 30 (depends on 29) The method of claim 29, in which the package comprises loose glass wool fibres in the range of 60% wt to 80% wt and loose rock wool fibres in the range 20% wt to 40% wt. ### Claim 31 (depends on 27) The method of claim 27, in which the remaining weight of the content of the package is made up of at least one component selected from a dry binder, an anti-dust agent and an anti-static agent. ### Claim 32 A sprayed mineral wool insulating product provided on a support surface of a building element, the layer comprising (in % by weight with respect of the total weight of the layer): a binder; at least 50% wt of first mineral wool fibres having a first composition; at least 5% wt of second mineral wool fibres having a second composition; in which the first mineral wool fibres and the second mineral wool fibres have a difference of softening point which is at least 150° C., preferably at least 250° C. ### Claim 33 (depends on 16, 32) The sprayed mineral wool insulating product of claim 32, wherein the sprayed mineral wool insulating product is obtained by the method of claim 16. ### Claim 34 (depends on 31) The sprayed mineral wool insulating product of claim 31, wherein the first mineral wool fibres and the second mineral wool fibres have a difference of softening point which is at least 250° C.