# US 11,305,143 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 11,305,143 B2 - Document ID: US11305143B2 - Status: Granted - Kind: B2 - Application number: 17/097,229 - Filed: 2020-11-13 - Published: 2021-05-27 - Granted: 2022-04-19 - 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/US11305143B2 ## 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 a suspension agent; wherein the suspension agent comprises one or more of an organic solvent, a water-soluble polymer, and a salt; 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; wherein the second polysaccharide is different from the first polysaccharide; and the suspension agent comprises one or more of glycerol, a glycol, a glycol ether and a water-soluble polyethylene glycol. ### Claim 2 (depends on 1) A firefighting extinguishing composition, comprising the firefighting foam preservative composition of claim 1 and diluting agent that dissolves the second polysaccharide. ### Claim 3 (depends on 2) The firefighting extinguishing composition of claim 2, wherein the diluting agent comprises water selected from the group consisting of fresh water, sea water, brackish water, and combinations of two or more thereof. ### Claim 4 (depends on 3) The composition of claim 3, further comprising a foaming agent. ### Claim 5 (depends on 1) The composition of claim 1, wherein the first polysaccharide comprises xanthan gum; and the second polysaccharide comprises one or more of konjac gum, diutan gum, tara gum, guar gum and methylcellulose. ### Claim 6 (depends on 5) The composition of claim 5, wherein the second polysaccharide comprises konjac gum. ### Claim 7 (depends on 1) The composition of claim 1, wherein the composition further comprises one or more additional ingredients selected from the group consisting of preservatives, buffers, corrosion inhibitors, antimicrobial agents and humectants. ### Claim 8 (depends on 1) The composition of claim 1, wherein the composition has a viscosity of no more than about 6000 cPs. ### Claim 9 (depends on 1) The composition of claim 1, wherein the weight ratio of water to suspension agent is about 6:4 to 2:8. ### Claim 10 (depends on 1) The composition of claim 1, wherein the composition comprises about 0.1 to 1 wt. % of the first polysaccharide and about 3 to 12 wt. % of the second polysaccharide; the first polysaccharide comprises xanthan gum; and the second polysaccharide comprises one or more of konjac gum, diutan gum, tara gum, guar gum and methylcellulose. ### Claim 11 (depends on 1) The composition of claim 1, wherein the suspension agent comprises one or more organic solvents selected from the group consisting of diethylene glycol n-butyl ether, dipropylene glycol n-propyl ether, hexylene glycol, methylene glycol monobutyl ether, 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 and glycerol. ### Claim 12 (depends on 1) The composition of claim 1, wherein the suspension agent comprises a water-soluble polyethylene glycol having a molecular weight in a range of about 200 to about 1,000. ### Claim 13 (depends on 1) The composition of claim 1, wherein the suspension agent comprises one or more of ethylene glycol, propylene glycol, diethylene glycol mono-n-butyl ether and a water-soluble polyethylene glycol. ### Claim 14 (depends on 1) The composition of claim 1, wherein the suspension agent comprises a water-soluble polyethylene glycol; and the suspension system comprises at least about 25 wt. % water and at least about 40 wt. % of the water-soluble polyethylene glycol. ### Claim 15 (depends on 14) The composition of claim 14, wherein the composition comprises about 0.1 to 1 wt. % of the first polysaccharide and about 3 to 12 wt. % of the second polysaccharide; the first polysaccharide comprises xanthan gum; and the second polysaccharide comprises one or more of konjac gum, diutan gum and guar gum. ### Claim 16 (depends on 1) The composition of claim 1, wherein the at least one suspension agent comprises an organic solvent; the organic solvent comprises one or more of ethylene glycol, propylene glycol, diethylene glycol mono-n-butyl ether; and the suspension system comprises at least about 25 wt. % water and at least about 40 wt. % of the organic solvent. ### Claim 17 (depends on 16) The composition of claim 16, wherein the composition comprises about 0.1 to 1 wt. % of the first polysaccharide and about 3 to 12 wt. % of the second polysaccharide; the first polysaccharide comprises xanthan gum; and the second polysaccharide comprises one or more of konjac gum, diutan gum and guar gum. ### Claim 18 (depends on 1) The composition of claim 1, wherein the suspension agent is an organic solvent and/or a water-soluble polymer; and the weight ratio of water to suspension agent is about 1:4 to 3:2. ### Claim 19 (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 20 A firefighting foam preservative composition comprising: a suspension system comprising water; and a suspension agent; wherein the suspension agent comprises one or more of a glycol, a glycol ether and a water-soluble polyethylene glycol; a first polysaccharide that is soluble in the suspension system; and a second polysaccharide that is at least partially insoluble in the suspension system but soluble in water alone; wherein the second polysaccharide is different from the first polysaccharide. ### Claim 21 (depends on 20) The composition of claim 20, wherein the composition has a viscosity of no more than about 6000 cPs. ### Claim 22 (depends on 20) The composition of claim 20, wherein the composition comprises about 0.1 to 1 wt. % of the first polysaccharide and about 1 to 5 wt. % of the second polysaccharide. ### Claim 23 (depends on 20) The composition of claim 20, wherein the first polysaccharide comprises xanthan gum; and the second polysaccharide comprises one or more of konjac gum, tara gum, methylcellulose, diutan gum and guar gum. ### Claim 24 (depends on 20) The composition of claim 20, wherein the first polysaccharide comprises xanthan gum; and the second polysaccharide comprises one or more of rhamsam gum, welan gum and diutan gum. ### Claim 25 (depends on 20) The composition of claim 20, wherein the suspension agent comprises a glycol ether and/or a water-soluble polyethylene glycol. ### Claim 26 (depends on 20) The composition of claim 20, wherein the suspension agent comprises diethylene glycol monobutyl ether and/or 200 MW polyethylene glycol. ### Claim 27 (depends on 20) The composition of claim 20, further comprising a foaming agent. ### Claim 28 (depends on 27) A method of producing a firefighting foam comprising diluting the composition of claim 27 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 29 (depends on 20) The composition of claim 20, wherein the composition comprises about 0.1 to 1 wt. % of the first polysaccharide, which comprises xanthan gum; and about 1 to 5 wt. % of the second polysaccharide, which comprises diutan gum. ### Claim 30 (depends on 20) The composition of claim 20, wherein the composition comprises about 0.1 to 1 wt. % of the first polysaccharide, which comprises xanthan gum; about 1 to 5 wt. % of the second polysaccharide, which comprises one or more of rhamsam gum, welan gum and diutan gum; and the suspension agent comprises diethylene glycol monobutyl ether. ### Claim 31 (depends on 30) The composition of claim 30, wherein the first polysaccharide comprises xanthan gum; and the second polysaccharide comprises rhamsam gum. ### Claim 32 (depends on 30) The composition of claim 30, wherein the first polysaccharide comprises xanthan gum; and the second polysaccharide comprises welan gum. ### Claim 33 (depends on 30) The composition of claim 30, wherein the first polysaccharide comprises xanthan gum; and the second polysaccharide comprises diutan gum. ### Claim 34 (depends on 30) The composition of claim 30, wherein the composition has a viscosity of no more than about 6000 cPs. ### Claim 35 (depends on 30) The composition of claim 30, further comprising a foaming agent. ### Claim 36 (depends on 35) A method of producing a firefighting foam comprising: diluting the composition of claim 35 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.