# US 10,870,030 B2 · Fire extinguishing compositions and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,870,030 B2 - Document ID: US10870030B2 - Status: Granted - Kind: B2 - Application number: 16/388,468 - Filed: 2019-04-18 - Published: 2019-08-08 - Granted: 2020-12-22 - Earliest claimed: 2014-04-02 - Assignees: Tyco Fire Products LP - Applicants: Tyco Fire Products LP - Inventors: John Paul Libal - Web page: https://patentgrep.com/patent/US10870030B2 ## CPC - A62D 1/0071: {Foams} - A62D 1/005: {Dispersions; Emulsions} - A62D: CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS ## Abstract A firefighting foam preservative composition and a method of making the firefighting foam preservative composition are provided. The firefighting foam preservative composition includes a suspension system containing water and at least one suspension agent. The firefighting foam preservative composition also includes a first polysaccharide that is soluble in the suspension system; and a second polysaccharide that is insoluble in the suspension system, but soluble in water alone. Methods of using the firefighting foam preservative composition to produce a firefighting foam and using the firefighting foam to secure a hazard by extinguishing fire and/or suppressing flammable vapors are also provided. ## Claims ### Claim 1 A firefighting foam preservative composition, comprising: a suspension system comprising water and at least one suspension agent; a first polysaccharide that is soluble in the suspension system; a second polysaccharide that is insoluble in the suspension system but soluble in water alone; wherein the second polysaccharide is different from the first polysaccharide; and the at least one suspension agent comprises organic solvent and/or a water-soluble polymer; and the weight ratio of water to the at least one suspension agent is at least 2:8. ### Claim 2 (depends on 1) The firefighting foam preservative composition of claim 1, wherein the composition comprises about 0.1 to 1.0 wt. % of the first polysaccharide and about 3 to 12 wt. % of the second polysaccharide. ### Claim 3 (depends on 1) The firefighting foam preservative composition of claim 1, wherein the foam preservative composition has a viscosity of no more than about 6000 cPs. ### Claim 4 (depends on 1) The firefighting foam preservative composition of claim 1, wherein the at least one suspension agent comprises organic solvent selected from the group consisting of diethylene glycol n-butyl ether, dipropylene glycol n-propyl ether, hexylene glycol, ethylene glycol, dipropylene glycol, tripropylene glycol, dipropylene glycol monobutyl ether, dipropylene glycol monomethyl ether, ethylene glycol monobutyl ether, tripropylene glycol methyl ether, dipropylene glycol monopropyl ether, propylene glycol, glycerol, and mixtures of two or more thereof. ### Claim 5 (depends on 1) The firefighting foam preservative composition of claim 1, wherein the at least one suspension agent comprises diethylene glycol n-butyl ether, ethylene glycol, propylene glycol, polyethylene glycol or a mixture of two or more thereof. ### Claim 6 (depends on 1) The firefighting foam preservative composition of claim 1, wherein the first polysaccharide comprises xanthan gum; the second polysaccharide comprises guar gum, konjac gum, tara gum, methylcellulose or a mixture of two or more thereof; and the at least one suspension agent comprises polyethylene glycol. ### Claim 7 (depends on 1) The firefighting foam preservative composition of claim 1, wherein the first polysaccharide comprises xanthan gum; the second polysaccharide comprises guar gum, konjac gum, tara gum, methylcellulose or a mixture of two or more thereof; and the at least one suspension agent comprises diethylene glycol n-butyl ether. ### Claim 8 (depends on 1) The firefighting foam preservative composition of claim 1, wherein the first polysaccharide comprises xanthan gum; the second polysaccharide comprises guar gum, konjac gum, tara gum, methylcellulose or a mixture of two or more thereof; and the at least one suspension agent comprises ethylene glycol and/or propylene glycol. ### Claim 9 (depends on 1) The firefighting foam preservative composition of claim 1, wherein the first polysaccharide comprises xanthan gum; the second polysaccharide comprises konjac gum; and the at least one suspension agent comprises polyethylene glycol. ### Claim 10 (depends on 1) The firefighting foam preservative composition of claim 1, wherein the first polysaccharide comprises xanthan gum; the second polysaccharide comprises konjac gum; and the at least one suspension agent comprises ethylene glycol and/or propylene glycol. ### Claim 11 (depends on 1) The firefighting foam preservative composition of claim 1, wherein the first polysaccharide comprises xanthan gum; the second polysaccharide comprises konjac gum; and the at least one suspension agent comprises diethylene glycol n-butyl ether. ### Claim 12 (depends on 1) The firefighting foam preservative composition of claim 1, comprising about 0.1 to 1.0 wt. % of the first polysaccharide, which comprises xanthan gum; and about 3 to 12 wt. % of the second polysaccharide, which comprises konjac gum. ### Claim 13 (depends on 1) The firefighting foam preservative composition of claim 1, wherein the first polysaccharide is xanthan gum; the second polysaccharide is konjac gum; the at least one suspension agent comprises PEG 200 MW; the weight ratio of water to the at least one suspension agent is at least 4:6; and the foam preservative composition has a viscosity of about 1000 to 6000 cPs. ### Claim 14 (depends on 1) A firefighting foam composition comprising the firefighting foam preservative composition of claim 1 and a foaming agent. ### Claim 15 (depends on 14) The firefighting foam composition of claim 14, further comprising at least one diluting agent that dissolves the second polysaccharide. ### Claim 16 (depends on 15) The composition of claim 15, wherein the at least one diluting agent comprises fresh water, brackish water, sea water, or a combination of two or more thereof. ### Claim 17 (depends on 1) A method of producing a firefighting foam comprising diluting the composition of claim 1 with a diluting agent to form a diluted solution, wherein the diluting agent comprises fresh water, brackish water, sea water, or a combination of two or more thereof; and aerating the diluted solution. ### Claim 18 (depends on 17) A firefighting foam produced by the method of claim 17. ### Claim 19 (depends on 18) A method of securing a hazard comprising applying the firefighting foam of claim 18 to a hazard to extinguish fire and/or suppress flammable vapors. ### Claim 20 A firefighting foam preservative composition, comprising: a suspension system comprising water and at least one suspension agent; a first polysaccharide that is soluble in the suspension system; a second polysaccharide that is insoluble in the suspension system but soluble in water alone; wherein the second polysaccharide is different from the first polysaccharide; and the at least one suspension agent comprises organic solvent and/or a water-soluble polymer; and the foam preservative composition has a viscosity of no more than about 6000 cPs. ### Claim 21 (depends on 20) The firefighting foam preservative composition of claim 20, comprising about 0.1 to 1.0 wt. % of the first polysaccharide, which comprises xanthan gum; and about 3 to 12 wt. % of the second polysaccharide, which comprises guar gum, konjac gum, tara gum, methylcellulose or a mixture of two or more thereof. ### Claim 22 (depends on 20) The firefighting foam preservative composition of claim 20, wherein the first polysaccharide is xanthan gum; the second polysaccharide is konjac gum; the at least one suspension agent is polyethylene glycol; and the composition has a weight ratio of water to the at least one suspension agent of at least 2:8. ### Claim 23 (depends on 20) The firefighting foam preservative composition of claim 20, wherein the first polysaccharide comprises xanthan gum; the second polysaccharide comprises one or more of guar gum, konjac gum, tara gum and methylcellulose; and the at least one suspension agent comprises one or more of polyethylene glycol, diethylene glycol n-butyl ether, ethylene glycol and propylene glycol. ### Claim 24 (depends on 20) A firefighting foam composition comprising the firefighting foam preservative composition of claim 20 and a foaming agent. ### Claim 25 (depends on 24) The firefighting foam composition of claim 24, further comprising at least one diluting agent that dissolves the second polysaccharide. ### Claim 26 (depends on 20) A method of producing a firefighting foam comprising diluting the composition of claim 20 with a diluting agent to form a diluted solution, wherein the diluting agent comprises fresh water, brackish water, sea water, or a combination of two or more thereof; and aerating the diluted solution. ### Claim 27 (depends on 26) A firefighting foam produced by the method of claim 26. ### Claim 28 (depends on 27) A method of securing a hazard comprising applying the firefighting foam of claim 27 to a hazard to extinguish fire and/or suppress flammable vapors.