WO2003018695A1 - Fire retardant foam and gel compositions - Google Patents
Fire retardant foam and gel compositions Download PDFInfo
- Publication number
- WO2003018695A1 WO2003018695A1 PCT/US2002/020501 US0220501W WO03018695A1 WO 2003018695 A1 WO2003018695 A1 WO 2003018695A1 US 0220501 W US0220501 W US 0220501W WO 03018695 A1 WO03018695 A1 WO 03018695A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- urea
- fire retardant
- fire
- hydroxyethyl
- composition
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims abstract description 76
- 239000006260 foam Substances 0.000 title claims abstract description 41
- 239000003063 flame retardant Substances 0.000 title claims abstract description 35
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 32
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000004202 carbamide Substances 0.000 claims abstract description 26
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 150000003672 ureas Chemical class 0.000 claims abstract description 16
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 15
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 14
- 230000000979 retarding effect Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 7
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 7
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims abstract description 7
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 235000013877 carbamide Nutrition 0.000 claims description 29
- 239000002562 thickening agent Substances 0.000 claims description 24
- 239000000839 emulsion Substances 0.000 claims description 21
- 239000003513 alkali Substances 0.000 claims description 17
- 239000002253 acid Substances 0.000 claims description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 11
- 238000000518 rheometry Methods 0.000 claims description 11
- 239000002585 base Substances 0.000 claims description 10
- BQMXKMPREFOYHS-UHFFFAOYSA-N 1,1-bis(2-hydroxyethyl)urea Chemical compound OCCN(C(=O)N)CCO BQMXKMPREFOYHS-UHFFFAOYSA-N 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 229920002472 Starch Polymers 0.000 claims description 8
- 150000001252 acrylic acid derivatives Chemical class 0.000 claims description 8
- LVHBHZANLOWSRM-UHFFFAOYSA-N itaconic acid Chemical compound OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims description 8
- 239000008107 starch Substances 0.000 claims description 8
- 235000019698 starch Nutrition 0.000 claims description 8
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims description 6
- -1 saccharide ureas Chemical class 0.000 claims description 6
- 229920001353 Dextrin Polymers 0.000 claims description 5
- 239000004375 Dextrin Substances 0.000 claims description 5
- 235000019425 dextrin Nutrition 0.000 claims description 5
- FLISWPFVWWWNNP-BQYQJAHWSA-N dihydro-3-(1-octenyl)-2,5-furandione Chemical compound CCCCCC\C=C\C1CC(=O)OC1=O FLISWPFVWWWNNP-BQYQJAHWSA-N 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- NLMKTBGFQGKQEV-UHFFFAOYSA-N 2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-(2-hexadecoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethanol Chemical compound CCCCCCCCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO NLMKTBGFQGKQEV-UHFFFAOYSA-N 0.000 claims description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 4
- 229920002845 Poly(methacrylic acid) Polymers 0.000 claims description 4
- 229940056318 ceteth-20 Drugs 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 4
- 229920001592 potato starch Polymers 0.000 claims description 4
- KSYGJAFGQWTAFW-UHFFFAOYSA-N 1,3-bis(2-hydroxyethyl)urea Chemical compound OCCNC(=O)NCCO KSYGJAFGQWTAFW-UHFFFAOYSA-N 0.000 claims description 3
- SYSQOLNYEICLCA-UHFFFAOYSA-N 1,3-bis(4-hydroxybutyl)urea Chemical compound OCCCCNC(=O)NCCCCO SYSQOLNYEICLCA-UHFFFAOYSA-N 0.000 claims description 3
- CLAHOZSYMRNIPY-UHFFFAOYSA-N 2-hydroxyethylurea Chemical compound NC(=O)NCCO CLAHOZSYMRNIPY-UHFFFAOYSA-N 0.000 claims description 3
- NNTWKXKLHMTGBU-UHFFFAOYSA-N 4,5-dihydroxyimidazolidin-2-one Chemical compound OC1NC(=O)NC1O NNTWKXKLHMTGBU-UHFFFAOYSA-N 0.000 claims description 3
- 229920000881 Modified starch Polymers 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229920001519 homopolymer Polymers 0.000 claims description 3
- 235000019426 modified starch Nutrition 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- GRHQBTVCBZRVCM-UHFFFAOYSA-N 1,1,3,3-tetrakis(2-hydroxyethyl)urea Chemical compound OCCN(CCO)C(=O)N(CCO)CCO GRHQBTVCBZRVCM-UHFFFAOYSA-N 0.000 claims description 2
- 235000019463 artificial additive Nutrition 0.000 claims 4
- 239000004814 polyurethane Substances 0.000 claims 3
- 229920002635 polyurethane Polymers 0.000 claims 3
- VKUPKRKGNSEUNN-UHFFFAOYSA-N 1,1,3-tris(2-hydroxyethyl)urea Chemical compound OCCNC(=O)N(CCO)CCO VKUPKRKGNSEUNN-UHFFFAOYSA-N 0.000 claims 2
- FALRKNHUBBKYCC-UHFFFAOYSA-N 2-(chloromethyl)pyridine-3-carbonitrile Chemical compound ClCC1=NC=CC=C1C#N FALRKNHUBBKYCC-UHFFFAOYSA-N 0.000 claims 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 claims 1
- 229940014800 succinic anhydride Drugs 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000003607 modifier Substances 0.000 abstract 2
- 239000002023 wood Substances 0.000 description 10
- 239000006254 rheological additive Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- 229920000247 superabsorbent polymer Polymers 0.000 description 7
- 239000004583 superabsorbent polymers (SAPs) Substances 0.000 description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 240000003183 Manihot esculenta Species 0.000 description 2
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 2
- 235000011613 Pinus brutia Nutrition 0.000 description 2
- 241000018646 Pinus brutia Species 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000011736 potassium bicarbonate Substances 0.000 description 2
- 235000015497 potassium bicarbonate Nutrition 0.000 description 2
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 2
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- WVRNUXJQQFPNMN-VAWYXSNFSA-N 3-[(e)-dodec-1-enyl]oxolane-2,5-dione Chemical compound CCCCCCCCCC\C=C\C1CC(=O)OC1=O WVRNUXJQQFPNMN-VAWYXSNFSA-N 0.000 description 1
- 240000001592 Amaranthus caudatus Species 0.000 description 1
- 235000009328 Amaranthus caudatus Nutrition 0.000 description 1
- 229920000856 Amylose Polymers 0.000 description 1
- 235000005273 Canna coccinea Nutrition 0.000 description 1
- 240000008555 Canna flaccida Species 0.000 description 1
- 240000005979 Hordeum vulgare Species 0.000 description 1
- 235000007340 Hordeum vulgare Nutrition 0.000 description 1
- 244000017020 Ipomoea batatas Species 0.000 description 1
- 235000002678 Ipomoea batatas Nutrition 0.000 description 1
- 244000151018 Maranta arundinacea Species 0.000 description 1
- 235000010804 Maranta arundinacea Nutrition 0.000 description 1
- 240000008790 Musa x paradisiaca Species 0.000 description 1
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 240000004713 Pisum sativum Species 0.000 description 1
- 235000010582 Pisum sativum Nutrition 0.000 description 1
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- 240000006394 Sorghum bicolor Species 0.000 description 1
- 235000011684 Sorghum saccharatum Nutrition 0.000 description 1
- 235000012419 Thalia geniculata Nutrition 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 244000098338 Triticum aestivum Species 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000004178 amaranth Substances 0.000 description 1
- 235000012735 amaranth Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 229920006037 cross link polymer Polymers 0.000 description 1
- 239000011243 crosslinked material Substances 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- YAMHXTCMCPHKLN-UHFFFAOYSA-N imidazolidin-2-one Chemical compound O=C1NCCN1 YAMHXTCMCPHKLN-UHFFFAOYSA-N 0.000 description 1
- 235000021374 legumes Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
- C09D5/185—Intumescent paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K21/00—Fireproofing materials
- C09K21/06—Organic materials
- C09K21/10—Organic materials containing nitrogen
Definitions
- the present invention relates to novel foam and gel compositions for preventing combustion and retarding the spread of fire.
- WUI wildland/urban interface
- WSI wildland/suburban interface
- the conventional method of combating WUI, WSI and other fires, has been to apply water to the fire. This procedure has, however, often been ineffective because of the problems associated with the use of water. Due to run-off and evaporation, water is not readily retained on surfaces which are on fire or in danger of catching on fire. Further, this procedure is not effective in preventing the spread of fire to assets at risk, such as houses, structures and cars, which are not initially engulfed by the fire.
- U.S. Patent No. 5,849,210 discloses a method of retarding a combustible object from burning comprising applying a mixture of water and a superabsorbent polymer which absorbs at least 20 times its weight in water onto an exposed surface of the combustible object.
- Superabsorbent polymers do not dissolve well and also swell and impart high viscosity to aqueous mixtures.
- superabsorbent polymers are brittle and glassy when dry and generally are more expensive than the corresponding non-crosslinked polymers.
- U.S. Patent No. 6,251 ,961 discloses a flame- retardant coating comprising substances which carbonize and form a foam layer in the event of a fire.
- the present invention provides a composition which retards the spread of fire, protects items from fire damage and emits a material which aids in extinguishing the fire.
- the composition may be either in the form of a gel or a foam and may be used to protect any sort of object, such as personal property, real property or even humans, from fire.
- the gel form of the composition contains urea or a urea derivative that retains water and releases C0 2 upon heating.
- a rheology modifier is also employed.
- the foam form of the composition contains the urea or urea derivative and the rheology modifier, along with a foam generator such as an acid and base.
- a method of retarding fire comprises the coating of an item with the fire retardant such that the retardant protects the item from the fire and aids in extinguishing the fire by releasing carbon dioxide.
- a composition for retarding fire and the spread of fire which may be in the form of a foam or a gel.
- the composition may be applied to any combustible item prior to the item's contact with fire in order to prevent the item from burning.
- the composition may be applied to personal property, real property, or even to humans or clothing.
- the composition may be utilized to coat wiidland areas, such as fields or forests, to prevent the spread of fire .to those areas.
- the composition may also be used to combat WUI and WSI fires by coating assets at risk, such as houses, other structures and cars, that border the wiidland areas which are affected by a fire.
- the composition acts to protect the combustible item by providing insulation from the fire and also by releasing carbon dioxide to aid in extinguishing the fire.
- the composition provides the superior protection qualities of good contact with coverage and good vertical adhesion to objects.
- the foam version of the composition also provides the added benefit of re-foaming upon exposure to heat.
- the fire retarding composition comprises a carbon dioxide releasing component, preferably, but not limited to, a urea or a urea derivative comprising a water soluble agent, that retains water but releases carbon dioxide upon heating.
- a second component is a rheology modifier.
- the urea or urea derivative/rheology modifier composition may be diluted with water.
- a foam generator such as an acid and base, may be added to the composition to provide a foam composition.
- a synthetic composition such as polyvinyl alcohol or crosslinked materials may also be added to the composition.
- the fire retarding composition comprises an alkali swellable rheology modifier under acidic conditions which is combined with water and treated such that the pH is raised to about 6.5.
- the composition of this alternative embodiment may be utilized as a fire retarding gel.
- the urea or urea derivative of the composition preferably comprises a urea or a (hydroxyalkyl)urea ("HAU"), which is defined as any urea derivative containing at least one urea group and at least one hydroxyl group.
- HAU hydroxyalkylurea
- Hydroxyalkylureas release carbon dioxide, a well-known fire retardant, upon heating. Upon heating to approximately 130 - 170 °C and exposure to fire, the carbon dioxide released by the HAU will act as an aid in extinguishing the fire.
- hydroxyalkylureas contain at least one urea group and at least one hydroxyl group. Carbons disposed between the hydroxyl and urea groups may be in linear, branched or substituted configuration.
- HAU The general structure and description of HAU is set out in U.S. Patents Nos. 5,840,822 and 5,858,549, and those patents are herein incorporated by reference.
- Exemplary types of HAU include, without limitation, mono(hydroxyethyl)urea, N,N-bis(2-hydroxyethyl)urea, tetrakis(2- hydroxyethyl)urea, tris(2-hydroxyethyi)urea, N,N'-bis(2-hydroxyethyl)urea, N,N'-(3-hydroxypropyl)urea, N,N'-bis(4-hydroxybutyl)urea, 2-urea-2-ethyl-1 ,3- propanediol, saccharide ureas, 4,5-dihydroxyethylene urea, or mixtures thereof.
- Other useful ureas include ureas having bases of ethylene urea.
- the urea derivative component comprises N,N-bis(2- hydroxyeth
- a rheology modifier is added to the urea or urea derivative to thicken the composition and give the composition desired rheology.
- the rheology modifier may be a homopolymer or a copoiymer containing a carboxyl group which is capable of building viscosity above pH 6.5.
- Examples of preferred thickeners include alkali swellable emulsion thickeners and acrylic emulsion thickeners, such as acrylates/stearath - 20 itaconate copoiymer (STRUCTURE ® 2001 , National Starch & Chemical Company), acrylates/ceteth - 20 itaconate copoiymer (STRUCTURE ® 3001 , National Starch & Chemical Company), and potato starch modified (STRUCTURE ® Solanace, National Starch & Chemical Company).
- alkali swellable emulsion thickeners such as acrylates/stearath - 20 itaconate copoiymer (STRUCTURE ® 2001 , National Starch & Chemical Company), acrylates/ceteth - 20 itaconate copoiymer (STRUCTURE ® 3001 , National Starch & Chemical Company), and potato starch modified (STRUCTURE ® Solanace, National Starch & Chemical Company).
- thickeners which may be employed include, without limitation, starch modified thickeners, alkali swellable emulsion thickeners, specifically those which have an acid pH but become highly viscous when neutralized with a base, poly(acrylic) acid, poly(methacrylic) acid, copolymers of acrylic acid and methacrylic acid, hydrophobicaily modified alkali swellable emulsions which have a pH adjusted to above 6.5 to activate its thickening mechanism, and mixtures thereof.
- a fire retardant gel may comprise either a one or a two-part composition, with one part comprising the urea or urea derivative and the other part comprising the thickener.
- a gel formulation comprises a mixture of N,N-bis(2-hydroxyethyl)urea and an alkali swellable emulsion thickener, such as STRUCTURE ® 2001.
- the two components may either be mixed together during storage or just prior to application.
- the components may be mixed together in a ratio of about 1 to 1 , but are most preferably mixed together in a ratio of about 1 :0.2.
- An alternative embodiment of a fire retardant gel formulation may comprise an 8% solution of a rheology thickener, such as STRUCTURE ® 2001 , in an aqueous base having a pH of no less than 6.5.
- a two-part composition having a first part of urea and a second part of a rheology modifier and also containing a base and an acid as a foam generator is provided.
- Any base either ionic or molecular, that is capable of building a viscosity above pH 6.5 may be added to the urea or urea derivative.
- Preferred foam generators include sodium bicarbonate and citric acid, and octenyl succinic anhydride or dodecenyl succinic anhydride modified starches, dextrins and flour. Typical sources for these are cereals, tubers, roots, fruits and legumes.
- Other sources include corn, potato, peas, sweet potato, banana, barley, wheat, rice, amaranth, arrowroot, tapioca, sago, canna, sorghum, British gums and waxy or high amylose varieties of the above.
- Other base foam generators may include, but are not limited to, potassium bicarbonate, calcium carbonate, urea-base potassium bicarbonate and potassium chloride, along with an acid. Any surfactant may also be used to generate foam.
- the two parts are maintained separately from each other and put into contact with each other just prior to application to the item to be protected.
- One method of applying the foam composition is through a twin tank applicator which maintains the components separately until they are being applied to the item to be protected.
- the preferred example of a two-part foam fire retardant composition comprises a first part of N,N-bis(2-hydroxyethyl)urea and sodium bicarbonate in a ratio of about 20:1 to about 1 :1 , and preferably in a ratio of about 5:1 and a second part of a thickener, such as an acrylic emulsion thickener or alkali swellable emulsion and citric acid in a ratio of about 28:1 to about 1 :1 and preferably in a ratio of about 3.5:0.1.
- the two parts are combined in a ratio of about 1 :1 to form the final foam composition.
- a second preferred example of a foam composition comprises a first part of a 50% solids solution of 3% octenyl succinic anhydride on tapioca dextrin (NSC 78-0624, National Starch and Chemical Company) in hydroxyalkyl urea and sodium bicarbonate.
- Octenyl succinic anhydride attached to hydroxyl groups is known to be a natural foam generator.
- the octenyl succinic anhydride modified dextrin may be added as a cold slurry, or it may be batch cooked at about 80 °C, held for about 30 minutes and then lowered to room temperature before the sodium bicarbonate is added.
- the second part of the composition comprises a thickener, such as 8.4% STRUCTURE ® 2001 in water, and an acid, such as citric acid.
- the ratio of thickener to acid in the second part is preferably in the range of about 3.5:0.1.
- the two parts of the foam are combined in a ratio of about 1 :1 to form the final foam composition.
- the invention can be further described by the following example.
- EXAMPLE 1 Foam and gel fire retardant compositions were formulated as follows:
- a two-part fire retardant gel was manufactured comprising a first part of 25 mL of 100% HAU and a second part of 25 mL of 8.4% solution of alkali swellable emulsion thickener (NSC STRUCTURE ® 2001 ). The two parts were mixed together in a ratio of about 1 :1. The gel was applied to a vertical inclined surface of 22 square inches of 5/8 inch thick pine wood and allowed to stand for ten minutes before igniting.
- a foam fire retardant gel comprising a first part of 25 mL of N,N-bis(2-hydroxyethyl)urea and sodium bicarbonate in a ratio of about 5:1.
- a second part comprising 25 mL of an 8.4 % solution of an alkali swellable emulsion (NSC STRUCTURE ® 2001) and citric acid was prepared at a ratio of about 3.5:0.1.
- the two parts were mixed together and applied to a vertical inclined surface of 22 square inches of 5/8 inch thick pine wood and allowed to stand for ten minutes before igniting.
- a third wood surface was provided having no coating and a fourth wood surface was doused with 50 mL of water. Both of these wood surfaces were positioned to a vertical position. A torch having a temperature of approximately 2500 °F was applied to the four wood surfaces. The results are illustrated in Table 1.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Fire-Extinguishing Compositions (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Fireproofing Substances (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/938,452 | 2001-08-24 | ||
US09/938,452 US20030038272A1 (en) | 2001-08-24 | 2001-08-24 | Fire retardant foam and gel compositions |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003018695A1 true WO2003018695A1 (en) | 2003-03-06 |
Family
ID=25471470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2002/020501 WO2003018695A1 (en) | 2001-08-24 | 2002-06-28 | Fire retardant foam and gel compositions |
Country Status (4)
Country | Link |
---|---|
US (2) | US20030038272A1 (en) |
ES (1) | ES2237340B1 (en) |
TW (1) | TW589357B (en) |
WO (1) | WO2003018695A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006056379A2 (en) * | 2004-11-24 | 2006-06-01 | Basf Aktiengesellschaft | Fire extinguishing and/or fire-retardant compositions |
WO2009042762A1 (en) * | 2007-09-25 | 2009-04-02 | Micon | Method of controlling mine fires with polymeric gel |
US8273693B2 (en) | 2001-12-12 | 2012-09-25 | Clearwater International Llc | Polymeric gel system and methods for making and using same in hydrocarbon recovery |
ES2783892R1 (en) * | 2017-10-06 | 2020-10-05 | Soriano Azorin Juan Jose | FIRE EXTINGUISHING SYSTEM |
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Also Published As
Publication number | Publication date |
---|---|
ES2237340B1 (en) | 2007-07-01 |
ES2237340A1 (en) | 2005-07-16 |
US7033526B2 (en) | 2006-04-25 |
TW589357B (en) | 2004-06-01 |
US20030038272A1 (en) | 2003-02-27 |
US20050127338A1 (en) | 2005-06-16 |
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