[go: up one dir, main page]

WO2025052274A1 - Xanthane réticulé lié à la performance de stabilité de l'isopropanol - Google Patents

Xanthane réticulé lié à la performance de stabilité de l'isopropanol Download PDF

Info

Publication number
WO2025052274A1
WO2025052274A1 PCT/IB2024/058605 IB2024058605W WO2025052274A1 WO 2025052274 A1 WO2025052274 A1 WO 2025052274A1 IB 2024058605 W IB2024058605 W IB 2024058605W WO 2025052274 A1 WO2025052274 A1 WO 2025052274A1
Authority
WO
WIPO (PCT)
Prior art keywords
surfactant
fighting
fire
concentrate
mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/IB2024/058605
Other languages
English (en)
Inventor
Rachel Janice CEAGLSKE
Alec VANDENHEUVEL
John P. LIBAL
JoAnna Marie MONFILS
Alison ASCHER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tyco Fire Products LP
Original Assignee
Tyco Fire Products LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tyco Fire Products LP filed Critical Tyco Fire Products LP
Publication of WO2025052274A1 publication Critical patent/WO2025052274A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
    • A62D1/0071—Foams

Definitions

  • Firefighting foams are often able to fight Class A and Class B fires.
  • Class A fires are those involving combustible material such as paper, wood, etc. and may be fought by quenching and cooling with large quantities of water or solutions containing water.
  • Class B fires are those involving flammable liquid fuels, gasoline, and other hydrocarbons and are difficult to extinguish. Most flammable liquids exhibit high vapor pressure along with low fire and flash points. This typically results in a wide flammability range. In this type of fire, the use of water as the sole firefighting agent is generally ineffective because the only means of fighting fire with water is through cooling.
  • Conventional foam-forming firefighting compositions commonly include fluorinated surfactants. There is a strong desire in the marketplace to replace these fluorinated firefighting products with non-fluorinated products. There is, therefore, a continuing need to produce non-fluorinated firefighting compositions, also known as synthetic fluorine-free foams (“SFFFs”) that may be deployed to fight Class A and Class B fires.
  • SFFFs synthetic fluorine-free foams
  • aqueous fire-fighting foam concentrates may be diluted with an aqueous diluent to provide a foam precursor composition, which may in turn be aerated to form a firefighting foam.
  • the present aqueous fire-fighting foam concentrates include a xanthan gum crosslinked by a metal salt, a surfactant component, and water.
  • the aqueous fire-fighting foam concentrates may further include a sugar component, an organic solvent, or a combination thereof.
  • the xanthan gum is deacylated or partially deacylated.
  • the metal salt includes a divalent ion.
  • the divalent ion is selected from Ca 2+ , Ba 2+ , Sr 2 *, Zn 2+ , or a mixture of any two or more thereof.
  • the metal salt is selected from calcium chloride, calcium acetate, strontium chloride, strontium acetate, barium chloride, barium acetate, zinc chloride, or a mixture of any two or more thereof.
  • the surfactant component includes a non-ionic surfactant, an anionic surfactant, an amphoteric surfactant, or a mixture of any two or more thereof.
  • the non-ionic surfactant includes an alkyl polyglycoside, an aliphatic alcohol-based non-ionic surfactant, or a mixture of any two or more thereof.
  • the non-ionic surfactant includes an alkyl polyglucoside, an aliphatic alcohol, an aliphatic alcohol ethoxylate, or a mixture of any two or more thereof.
  • the anionic surfactant includes an alkyl sulfate salt, an alkyl sulfonate salt, an alkyl ether sulfate surfactant, an alkyl ether sulfonate surfactant, or a mixture of any two or more thereof.
  • the amphoteric surfactant is selected from an alkylamidoalkyl hydroxysultaine, an alkylamidoalkyl betaine, an alkyl sulfobetaine surfactant, an alkyl betaine surfactant, or a mixture of any two or more thereof.
  • the aqueous fire-fighting foam concentrate further includes a sugar component, an organic solvent, or a combination thereof.
  • the sugar component includes a monosaccharide sugar, a disaccharide sugar, a sugar alcohol, or a mixture of any two or more thereof.
  • the sugar component includes glucose, fructose, mannose, sucrose, maltose, lactose, lactulose, trehalose, cellobiose, chitobiose, xylose, sorbitol, mannitol, or a combination of any two or more thereof.
  • the organic solvent includes an alkylene glycol, a glycerol, a water-soluble polyethylene glycol, a glycol ether, or a mixture of any two or more thereof.
  • an aqueous fire-fighting foam concentrate including a xanthan gum crosslinked by a metal salt; a surfactant component including a nonionic surfactant, an anionic surfactant, an amphoteric surfactant, or a mixture of any two or more thereof; an organic solvent; a sugar component; and water.
  • an aqueous fire-fighting foam concentrate including: about 0.5 to 5 wt% of xanthan gum crosslinked by a metal salt; about 0.1 to 15 wt% of the metal salt; about 1 to 30 wt% of a non-ionic surfactant; and at least about 30 wt% water.
  • the aqueous fire-fighting concentrate further includes about 2 to 20 wt% of an anionic surfactant; about 1 to 10 wt% of an amphoteric surfactant; about 0.5 to 20 wt% of an organic solvent; and about 5 to 25 wt% of a sugar component.
  • a method of forming a firefighting foam includes mixing any one of the aqueous fire-fighting concentrates described herein with an aqueous diluent to form a foam precursor solution and aerating the foam precursor solution to form the firefighting foam.
  • the aqueous diluent is selected from the group consisting of fresh water, brackish water, sea water, or a mixture of two or more thereof.
  • a method of extinguishing a fire is provided, the method including: administering a firefighting foam as described herein to the fire.
  • the fire is an isopropyl alcohol fire.
  • the aqueous fire-fighting foam concentrates of the present disclosure include xanthan gum crosslinked by a metal salt; a surfactant component; and water.
  • nonfluorinated foams use two or more different polysaccharides to achieve good fire performance; however, the present aqueous fire-fighting concentrates include only one polysaccharide.
  • the xanthan gum includes deacylated or partially deacylated xanthan gum.
  • the aqueous fire-fighting foam concentrates may include about 0.5 to 5 wt% of xanthan gum.
  • the aqueous firefighting foam concentrates may include about 0.5 wt%, about 1 wt%, about 2 wt%, about 3 wt%, about 4 wt%, or about 5 wt% of the xanthan gum.
  • the metal salts used in the present aqueous fire-fighting concentrates may include a divalent ion.
  • divalent ions for use in the present aqueous fire-fighting concentrates include, but are not limited to, Ca 2+ , Ba 2+ , Sr 2+ , Zn 2+ , or a mixture of any two or more thereof.
  • metal salts for use in the present aqueous fire-fighting concentrates include, but are not limited to, calcium chloride, calcium acetate, strontium chloride, strontium acetate, barium chloride, barium acetate, zinc chloride, or a mixture of any two or more thereof.
  • the aqueous fire-fighting foam concentrates may include about 0.1 to 15 wt%, about 0.5 to 15 wt%, about 1 to 15 wt%, about 5 to 15 wt%, about 10 to 15 wt%, about 0.1 to 10 wt%, or about 0.1 to 5 wt% of the metal salt.
  • the aqueous fire-fighting foam concentrates include about 0.1 wt%, about 0.5 wt%, about 1 wt%, about 2 wt%, about 3 wt%, about 4 wt%, about 5 wt%, about 6 wt%, about 7 wt%, about 8 wt%, about 9 wt%, about 10 wt%, about 11 wt%, about 12 wt%, about 13 wt%, about 14 wt%, or about 15 wt% of the metal salt.
  • the surfactant component may include a non-ionic surfactant, an anionic surfactant, an amphoteric surfactant, or a mixture of two or more thereof.
  • the nonionic surfactant may include an alkyl polyglycoside, an aliphatic alcohol-based nonionic surfactant, or a mixture thereof.
  • the non-ionic surfactant may include alkyl glycoside, an alkyl polyglucoside, an aliphatic alcohol, an aliphatic alcohol ethoxylate, or a mixture of two or more thereof.
  • the alkyl glycoside or alkyl polyglycoside (APG) each may include a Cs-Ci6 alkyl group.
  • the sugar-based surfactant may include octyl glucoside, decyl glucoside, lauryl glucoside, decyl maltoside, dodecyl maltoside, or an alkyl polyglucoside.
  • the alkyl polyglucoside is a Cs- alkyl polyglucoside.
  • the fire-fighting concentrate may include an aliphatic alcohol -based nonionic surfactant including an aliphatic alcohol having 8 to 14 carbon atoms and/or an aliphatic alcohol ethoxylate having 10 to 16 carbon atoms in its alcohol portion.
  • the aliphatic alcohol ethoxylate may have an average degree of polymerization (i.e., the average number of ethylene oxide units) of about 0.7-2.0.
  • the aliphatic alcohol ethoxylate has an average degree of polymerization of no more than about 1.5, no more than about 1.2, or no more than about 1.0.
  • Aliphatic alcohols which include a linear Cs-u-aliphatic alcohol, such as a Cs-u-fatty alcohol, may be used as a nonionic surfactant in the present firefighting compositions.
  • Non-limiting examples of such alcohols include one or more of octyl alcohol, decyl alcohol, lauryl alcohol, and myristyl alcohol.
  • the firefighting composition may include an aliphatic alcohol ethoxylate having an average of no more than about 2 ethylene oxide units.
  • the aliphatic alcohol portion of such ethoxylates may include about 10 to 16 carbon atoms.
  • Non-limiting examples include decyl alcohol ethoxylates, lauryl alcohol ethoxylates and/or myristyl alcohol ethoxylates.
  • the alcohol ethoxylates have an average of no more than about 2 ethylene oxide units, no more than about 1.5 ethylene oxide units, no more than about 1.2 ethylene oxide units, or no more than about 1 ethylene oxide units.
  • the aliphatic alcohol ethoxylate may include an ethoxylate of a linear Cs-i4- aliphatic alcohol having no more than about 1.2 ethylene oxide units.
  • the aqueous fire-fighting foam concentrates may include about 1 to 30 wt%, about 1 to 20 wt%, about 1 to 10 wt%, about 10 to 20 wt%, about 10 to 30 wt% of the non-ionic surfactant.
  • the aqueous fire-fighting foam concentrates may include about 1 wt%, about 2 wt%, about 3 wt%, about 4 wt%, about 5 wt%, about 6 wt%, about 7 wt%, about 8 wt%, about 9 wt%, about 10 wt%, about 11 wt%, about 12 wt%, about 13 wt%, about 14 wt%, about 15 wt%, about 16 wt%, about 17 wt%, about 18 wt%, about 19 wt%, about 20 wt%, about 21 wt%, about 22 wt%, about 23 wt%, about 24 wt%, about 25 wt%, about 26 wt%, about 27 wt%, about 28 wt%, about 29 wt%, or about 30 wt% of the non-ionic surfactant.
  • the alkyl sulfate salt surfactant may include a Cs-i2-alkyl sulfate salt.
  • the Cs-i2-alkyl sulfate salt include a dodecyl sulfate salt, a decyl sulfate salt, an octyl sulfate salt, or a mixture of any two or more thereof.
  • the alkyl sulfate salt may include an alkyl sulfate sodium salt, such as a sodium decyl sulfate, sodium octyl sulfate, or a mixture of any two or more thereof.
  • the firefighting composition may further include an anionic surfactant, which may include one or more surfactants selected from Cs-n-alkyl sulfate salts and/or a Cs-i2- alkyl sulfonate salts.
  • an anionic surfactant which may include one or more surfactants selected from Cs-n-alkyl sulfate salts and/or a Cs-i2- alkyl sulfonate salts.
  • an anionic surfactant may include one or more surfactants selected from Cs-n-alkyl sulfate salts and/or a Cs-i2- alkyl sulfonate salts.
  • an anionic surfactant may be a sodium, potassium and/or ammonium salt.
  • the aqueous firefighting foam concentrate may include about 2 to 20 wt.% of the anionic surfactant. In some embodiments, the aqueous firefighting foam concentrate may include about 2 to 15 wt.%, about 2 to 10 wt.% and, in some instances, about 3 to 10 wt.% of the anionic surfactant.
  • the aqueous firefighting foam concentrate may include about 2 wt%, about 3 wt%, about 4 wt%, about 5 wt%, about 6 wt%, about 7 wt%, about 8 wt%, about 9 wt%, about 10 wt%, about 11 wt%, about 12 wt%, about 13 wt%, about 14 wt%, about 15 wt%, about 16 wt%, about 17 wt%, about 18 wt%, about 19 wt%, or about 20 wt% of the anionic surfactant.
  • the present aqueous fire-fighting foam concentrates may include an amphoteric surfactant.
  • amphoteric surfactants include, but are not limited to, an alkylamidoalkyl betaine surfactant, an alkyl betaine surfactant, an alkyl sulfobetaine surfactant, an alkylamidoalkylene hydroxysultaine surfactant, such as an alkylamidopropyl hydroxysultaine surfactant, or a mixture of two or more thereof.
  • the firefighting composition may further include an amphoteric surfactant, which may include one or more of a Cs-is-alkylamidopropyl hydroxysultaine surfactant, a Cs- is-alkylamidopropyl betaine surfactant, a Cx-ix-alkyl sulfobetaine surfactant, a Cx-ix-alkyl betaine surfactant, or a mixture of two or more thereof.
  • an amphoteric surfactant which may include one or more of a Cs-is-alkylamidopropyl hydroxysultaine surfactant, a Cs- is-alkylamidopropyl betaine surfactant, a Cx-ix-alkyl sulfobetaine surfactant, a Cx-ix-alkyl betaine surfactant, or a mixture of two or more thereof.
  • Non-limiting examples of the alkylamidoalkylene hydroxysultaine surfactant include a Cs-is-alkylamidopropyl hydroxysultaine surfactant, such as a cocamidopropyl hydroxysultaine surfactant, which may include a lauryl amidopropyl hydroxysultaine and a myristylamidopropyl hydroxysultaine.
  • Non-limiting examples of the alkylamidoalkyl betaine surfactant include a Cs-is- alkylamidoalkyl betaine surfactant, such as a cocamidopropyl betaine, a tallowamidopropyl betaine, a lauryl amidopropyl betaine or a myristyl amidopropyl betaine.
  • the amphoteric surfactant may include a Cs- -alkylamidopropyl hydroxysultaine, such as a cocamidopropyl hydroxysultaine.
  • the amphoteric surfactant includes lauryl amidopropyl hydroxysultaine and/or my ri sty 1 ami dopropy 1 hydroxy sultaine .
  • the aqueous firefighting foam concentrate may include about 1 to 10 wt.% of the amphoteric surfactant. In certain embodiments, the aqueous firefighting foam concentrate may include about 2 to 10 wt.% or about 5 to 10 wt.% of the amphoteric surfactant. In some embodiments, the aqueous firefighting foam concentrate may include about 1 wt%, about 2 wt%, about 3 wt%, about 4 wt%, about 5 wt%, about 6 wt%, about 7 wt%, about 8 wt%, about 9 wt%, or about 10 wt% of the amphoteric surfactant.
  • the aqueous fire-fighting foam concentrates may further include a sugar component, an organic solvent, or a combination thereof.
  • Saccharides for use in the present aqueous fire-fighting concentrates are generally simple monosaccharide sugars and may include other carbohydrates, such as common sugar (sucrose/dextrose) derived from sugar cane or sugar beets.
  • Sucrose is a disaccharide composed from the basic, simple sugar molecules glucose and fructose. Mixtures where the majority of the sucrose has been broken down into its monosaccharide components, glucose, and fructose (e.g., invert sugar), are quite suitable for use in the present concentrates.
  • Sucrose is readily available in view of its world production from cane and sugar beet on the order of millions of tons per annum.
  • monosaccharides for use in the present concentrates include one or more of glucose, fructose, mannose, xylose, ribose, and galactose.
  • suitable disaccharides for use in the present foam concentrates include one or more of sucrose, lactose, maltose, trehalose, lactulose, cellobiose, and chitobiose.
  • suitable sugar alcohols for use in the present concentrates include one or more of a four carbon sugar alcohol, such as erythritol, a five carbon alditol, such as xylitol, a six carbon alditol, such as mannitol and/or sorbitol, and other sugar alcohols, such as isomalt.
  • the sugar alcohol is one derived from a monosaccharide.
  • the present aqueous fire-fighting foam concentrates may further include a sugar component that may include a monosaccharide sugar, a disaccharide sugar, and/or a sugar alcohol.
  • aqueous fire-fighting foam concentrate may include about 5 to 25 wt.% of the sugar component. In some embodiments, the aqueous fire-fighting foam concentrate may include about 10 to 20 wt.% of the sugar component.
  • the aqueous fire-fighting foam concentrate may include about 5 wt%, about 6 wt%, about 7 wt%, about 8 wt%, about 9 wt%, about 10 wt%, about 11 wt%, about 12 wt%, about 13 wt%, about 14 wt%, about 15 wt%, about 16 wt%, about 17 wt%, about 18 wt%, about 19 wt%, about 20 wt%, about 21 wt%, about 22 wt%, about 23 wt%, about 24 wt%, or about 25 wt% of the sugar component.
  • the present aqueous fire-fighting foam concentrates may further include an organic solvent, which may include one or more of a glycol, a glycol ether, glycerol and a water-soluble polyethylene glycol.
  • organic solvents include, but are not limited to, diethylene glycol n-butyl ether, dipropylene glycol n-propyl ether, hexylene glycol, ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, tripropylene glycol, dipropylene glycol monobutyl ether, dipropylene glycol monomethyl ether, diethylene glycol monobutyl ether, ethylene glycol monobutyl ether, tripropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, glycerol, and mixtures of two or more thereof.
  • the organic solvent may include a mixture of an alkylene glycol and a glycol ether, such as a glycol butyl ether.
  • the organic solvent includes an alkylene glycol ether, such as ethylene glycol monoalkyl ether, propylene glycol monoalkyl ether, dipropylene glycol monoalkyl ether, and/or diethylene glycol monoalkyl ether.
  • the organic solvent includes an alkylene glycol, such as ethylene glycol, propylene glycol, dipropylene glycol and/or diethylene glycol.
  • the organic solvent may include a mixture of a glycol ether, such as diethylene glycol monobutyl ether, and a glycol, such as ethylene glycol and/or propylene glycol.
  • a glycol ether such as diethylene glycol monobutyl ether
  • a glycol such as ethylene glycol and/or propylene glycol.
  • the organic solvent may include ethylene glycol and diethylene glycol monobutyl ether.
  • the organic solvent includes propylene glycol and diethylene glycol monobutyl ether.
  • the aqueous firefighting foam concentrate may include about 0.5 to about 20 wt.%, about 1 to about 20 wt.%, about 1 to about 15 wt.%, or about 2 to about 10 wt.% of the organic solvent.
  • the aqueous firefighting foam concentrate includes about 1 wt%, about 2 wt%, about 3 wt%, about 4 wt%, about 5 wt%, about 6 wt%, about 7 wt%, about 8 wt%, about 9 wt%, about 10 wt%, about 11 wt%, about 12 wt%, about 13 wt%, about 14 wt%, about 15 wt%, about 16 wt%, about 17 wt%, about 18 wt%, about 19 wt%, or about 20 wt% of the organic solvent.
  • the aqueous firefighting foam concentrate includes an organic solvent including one or more of an alkylene glycol, glycerol, and a glycol ether.
  • the alkylene glycol typically includes propylene glycol and/or ethylene glycol.
  • the glycol ether typically includes ethylene glycol monoalkyl ether, diethylene glycol monoalkyl ether, dipropylene glycol monoalkyl ether, triethylene glycol monoalkyl ether, and 1-butoxyethoxy- 2-propanol.
  • the organic solvent may be a mixture of alkylene glycol and glycol ether.
  • the organic solvent may be a mixture of propylene glycol and a glycol ether.
  • the organic solvent includes the alkylene glycol and glycol ether in a weight ratio of about 0.1 : 1 to about 10: 1 or about 0.2: 1 to about 5: 1.
  • the organic solvent may be a mixture of propylene glycol and diethylene glycol monobutyl ether.
  • the aqueous firefighting foam concentrate includes water.
  • the water is water from a municipal water source (e.g., tap water).
  • the water is a purified water, such as purified water that meets the standards set forth in the United States Pharmacopeia, which is incorporated by reference herein in relevant part.
  • the aqueous firefighting foam composition includes at least about 30 wt.% water, at least about 40 wt.% water, or at least about 50 wt.% water.
  • the aqueous firefighting foam concentrate includes greater than about 60 wt.% water.
  • the aqueous firefighting foam composition may be produced using a source of water that has a total concentration of fluorine atoms on a weight percentage basis of no more than about 1 ppm F. In further embodiments, the aqueous firefighting foam composition may be produced using a source of water that has an amount of fluorine that is below detection limits.
  • the aqueous firefighting foam compositions of the present disclosure are substantially free of fluorine.
  • the composition has a total concentration of fluorine atoms of less than 0.01 wt.%. In some embodiments, the composition has a total concentration of fluorine atoms of less than 0.005 wt.%. In some embodiments, the composition has a total concentration of fluorine atoms on a weight percentage basis of no more than about 70 parts per trillion (ppt) F.
  • the aqueous firefighting foam compositions of the present disclosure may include substantially less than 70 ppt F. In some embodiments, the total concentration of fluorine in the aqueous firefighting foam composition is below detection limits.
  • the aqueous firefighting foam concentrate further includes one or more corrosion inhibitors.
  • corrosion inhibitors includes ortho- phenylphenol, tolyltriazole, and phosphate ester acids.
  • the corrosion inhibitor is tolyltriazole.
  • the aqueous firefighting foam concentration further includes a reducing agent.
  • the reducing agent may be present in the foam concentration from about 0.01 wt% to about 5 wt%. This may include from about 0.01 wt% to about 3 wt%, from about 0.05 wt% to about 5 wt%, from about 1 wt% to about 5 wt%, or from about 1 wt% to about 3 wt%.
  • the reducing agent may be selected such that it is more readily oxidized compared to other components of the foam. For example, the reducing agent may be oxidized more readily than the sugar component. Examples of reducing agents include, but are not limited to, sodium sulfite, sodium bisulfite, sodium metabisulfite, or a mixture of any two or more thereof.
  • the aqueous firefighting foam concentrate may further include a preservative, such as one or more antimicrobial compounds and/or biocidal compounds.
  • a preservative such as one or more antimicrobial compounds and/or biocidal compounds.
  • these components are included to prevent the biological decomposition of natural product based polymers that are incorporated as polymeric film formers (e.g., a polysaccharide gum). Examples include Kathon CG/ICP (Rohm & Haas Company), Givgard G-4 40 (Givaudan, Inc.), Dowicil 75, and Dowacide A (Dow Chemical Company).
  • Table 1 below provides an example of a formulation of the present firefighting foam compositions designed to be combined with a diluent, aerated, and administered to fight a fire as a firefighting foam.
  • the firefighting foam concentrates described herein may be mixed with a diluent to form firefighting foam precursor solution, i.e., a use strength composition.
  • the firefighting foam precursor solution may be aerated (e.g., using a nozzle) to produce a firefighting foam including the firefighting foam concentrate and the diluent.
  • Illustrative diluents may include water, such as fresh water, brackish water, sea water, and combinations thereof.
  • the firefighting foam compositions described above may be 1 vol.%, 3 vol.%, or 6 vol.% concentrate solutions, meaning that the firefighting foam compositions are mixed with 99 vol.%, 97 vol. %, or 94 vol.% diluent, respectively, to form the firefighting foam precursor solution.
  • the order of addition of ingredients with appropriate agitation may impact the actual firefighting performance as seen in the UL and EN fire tests. It may be suitable to begin by mixing the sugar component and metal salt component with a substantial amount of water until dissolved. The surfactants are then blended into the sugar and salt solution. Subsequently, a solution or slurry of the xanthan gum in the water-miscible solvents is prepared and then blended into the aqueous phase of the foam concentrate. It was found that first preparing a slurry of the xanthan gum in an organic solvent may facilitate later dissolution and/or dispersal of the xanthan gum in the water/ surf actant/salt solution. This allows for the gums to properly hydrate without encapsulating (clumping) upon addition to the surfactant(s), other optional compounds, sugar, salt, and water.
  • Firefighting foams that were prepared not following this order of component addition may result in xanthan gum that is encapsulated, but not fully hydrated, which may result in the production of foams that are not satisfactory for fire testing.
  • the preparation of the xanthan gum slurry is important to the process of making the fire-fighting foam concentrate before adding the xanthan gum to the other components of the foam concentrate.
  • the firefighting foam compositions described herein may be used to fight a fire and/or to suppress flammable vapors by mixing the firefighting foam compositions with a diluent, aerating the resulting firefighting foam precursor solution to form a firefighting foam, and administering the firefighting foam to a fire or applying the firefighting foam to the surface of a volatile flammable liquid (e.g., gasoline or other flammable hydrocarbon or a flammable polar solvent).
  • a volatile flammable liquid e.g., gasoline or other flammable hydrocarbon or a flammable polar solvent
  • the aqueous fire-fighting foam composition may be used to extinguish isopropyl alcohol (IP A) fires.
  • the xanthan gum crosslinked by a divalent metal salt allows the fire-fighting composition to be effective on IPA fires.
  • the xanthan gum strengthened by crosslinking with a divalent metal salt forms a blanket over the fuel and allows the foam to extinguish the fire rather than have the foam be degraded by the fuel.
  • the xanthan blanket preserves the foam to also improve bum back performance.
  • Tables 2 - 4 below show examples of formulations of the present aqueous firefighting foam composition. The amounts shown in these tables represent the weight percentage of the particular component based on the total weight of the composition.
  • the formulations include a) xanthan gum crosslinked by a metal salt; b) a non-ionic surfactant; and c) water.
  • the formulations may further include: d) an anionic surfactant; e) an amphoteric surfactant; f) a sugar component; and/or g) an organic solvent.
  • Tables 5 and 6 below show the effects of different metal salts on the performance of the fire-fighting compositions using a static lab-scale stability on isopropyl alcohol test and compared to a control having no metal salt.
  • Table 5 demonstrates the differences between fire-fighting compositions having metal salts including divalent ions (DV1, DV2, DV4, Acl, Ac3, and Ac4) and monovalent ions (C12-C14).
  • Divalent ions excluding Mg 2+
  • Table 6 demonstrates the performance of fire-fighting compositions including non-ionic surfactants and deacylated xanthan gum. Barium acetate improved the IPA foam stability the most, followed by calcium acetate, then strontium acetate, then magnesium acetate (which showed minimal improvement over the control).
  • Tables 7-8 below show the effects of different polysaccharides on the performance of the fire-fighting compositions using the isopropyl alcohol static lab-scale stability test and compared to a control having no metal salt.
  • Table 7 demonstrates the performance differences between different types of xanthan gum
  • Table 8 demonstrates the performance differences of compositions having polysaccharides that are not xanthan gum.
  • the presence of calcium chloride significantly improved the IPA performance of several deacylated xanthan gums (Kelzan APAS, Kelzan T+, Kelzan AP).
  • the presence of calcium chloride slightly improved the IPA performance of Rhamsan gum.
  • the presence of calcium chloride had no effect of the IPA performance of Kelzan BT (xanthan gum with no deacetylation), Rheozan, diutan, and welan gums.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing Compositions (AREA)

Abstract

Un concentré de mousse aqueux de lutte contre l'incendie comprend de la gomme xanthane réticulée par un sel métallique, un composant tensioactif et de l'eau.
PCT/IB2024/058605 2023-09-06 2024-09-04 Xanthane réticulé lié à la performance de stabilité de l'isopropanol Pending WO2025052274A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202363580919P 2023-09-06 2023-09-06
US63/580,919 2023-09-06

Publications (1)

Publication Number Publication Date
WO2025052274A1 true WO2025052274A1 (fr) 2025-03-13

Family

ID=92966965

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2024/058605 Pending WO2025052274A1 (fr) 2023-09-06 2024-09-04 Xanthane réticulé lié à la performance de stabilité de l'isopropanol

Country Status (1)

Country Link
WO (1) WO2025052274A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200101340A1 (en) * 2017-06-02 2020-04-02 Chrystel Worsman Systems and compositions for suppressing and extinguishing fires
CN111214800A (zh) * 2018-11-26 2020-06-02 宁夏万汇云合消防科技有限公司 一种新型高分子水系灭火剂及其制备方法
US20220362609A1 (en) * 2021-05-14 2022-11-17 Tyco Fire Products Lp Firefighting foam composition
US20220362605A1 (en) * 2021-05-14 2022-11-17 Tyco Fire Products Lp Fire-fighting foam concentrate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200101340A1 (en) * 2017-06-02 2020-04-02 Chrystel Worsman Systems and compositions for suppressing and extinguishing fires
CN111214800A (zh) * 2018-11-26 2020-06-02 宁夏万汇云合消防科技有限公司 一种新型高分子水系灭火剂及其制备方法
US20220362609A1 (en) * 2021-05-14 2022-11-17 Tyco Fire Products Lp Firefighting foam composition
US20220362605A1 (en) * 2021-05-14 2022-11-17 Tyco Fire Products Lp Fire-fighting foam concentrate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TAKO MASAKUNI ET AL: "Evidence for Intramolecular Associations in Xanthan Molecules in Aqueous Media", AGRICULTURAL AND BIOLOGICAL CHEMISTRY, vol. 53, no. 7, 1 July 1989 (1989-07-01), JP, pages 1941 - 1946, XP093222166, ISSN: 0002-1369, Retrieved from the Internet <URL:https://www.tandfonline.com/doi/pdf/10.1080/00021369.1989.10869569> [retrieved on 20241108], DOI: 10.1080/00021369.1989.10869569 *

Similar Documents

Publication Publication Date Title
US12285640B2 (en) Fire-fighting foam concentrate
US11911644B2 (en) Fire-fighting foam concentrate
CA3218566A1 (fr) Concentre de mousse d&#39;extinction d&#39;incendie
US11673011B2 (en) Firefighting foam composition
CA3229814A1 (fr) Composition de mousse anti-incendie
WO2023073506A1 (fr) Composition anti-incendie exempte de glycol
WO2025052274A1 (fr) Xanthane réticulé lié à la performance de stabilité de l&#39;isopropanol
US20250256144A1 (en) Disaccharides used in fire fighting foams
EP4469168A1 (fr) Composition de mousse anti-incendie
WO2025196586A1 (fr) Composition de mousse de lutte contre l&#39;incendie
US20250144461A1 (en) Fire-fighting foam composition
US20250319341A1 (en) Polyethylene (pei) foam enhancers for firefighting foam compositions for class a and class b fires
WO2024180460A1 (fr) Mousses de lutte contre l&#39;incendie contenant du mica

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24783357

Country of ref document: EP

Kind code of ref document: A1