US2881138A - Dry powder fire extinguishing medium - Google Patents
Dry powder fire extinguishing medium Download PDFInfo
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- US2881138A US2881138A US510515A US51051555A US2881138A US 2881138 A US2881138 A US 2881138A US 510515 A US510515 A US 510515A US 51051555 A US51051555 A US 51051555A US 2881138 A US2881138 A US 2881138A
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- dry powder
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- 239000000843 powder Substances 0.000 title description 11
- 239000000203 mixture Substances 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 9
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 5
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 5
- 239000001506 calcium phosphate Substances 0.000 claims description 5
- 239000011872 intimate mixture Substances 0.000 claims description 5
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 5
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 4
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 4
- 229910000388 diammonium phosphate Inorganic materials 0.000 claims description 4
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000011343 solid material Substances 0.000 claims description 4
- 229910000391 tricalcium phosphate Inorganic materials 0.000 claims description 4
- 235000019731 tricalcium phosphate Nutrition 0.000 claims description 4
- 229940078499 tricalcium phosphate Drugs 0.000 claims description 4
- 235000019838 diammonium phosphate Nutrition 0.000 claims description 3
- 235000019359 magnesium stearate Nutrition 0.000 claims description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 2
- 208000011893 Febrile infection-related epilepsy syndrome Diseases 0.000 claims 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 5
- 239000001099 ammonium carbonate Substances 0.000 description 5
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 4
- 239000004254 Ammonium phosphate Substances 0.000 description 4
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 4
- 235000019289 ammonium phosphates Nutrition 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000001166 ammonium sulphate Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910000286 fullers earth Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229940032158 sodium silicate Drugs 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 235000019794 sodium silicate Nutrition 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- MOMKYJPSVWEWPM-UHFFFAOYSA-N 4-(chloromethyl)-2-(4-methylphenyl)-1,3-thiazole Chemical compound C1=CC(C)=CC=C1C1=NC(CCl)=CS1 MOMKYJPSVWEWPM-UHFFFAOYSA-N 0.000 description 1
- 239000005696 Diammonium phosphate Substances 0.000 description 1
- 244000228957 Ferula foetida Species 0.000 description 1
- 241000758791 Juglandaceae Species 0.000 description 1
- 241001460678 Napo <wasp> Species 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 229910052936 alkali metal sulfate Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical class OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 235000019983 sodium metaphosphate Nutrition 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 235000020234 walnut Nutrition 0.000 description 1
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
- A62D1/0007—Solid extinguishing substances
- A62D1/0014—Powders; Granules
Definitions
- n tcd S ates Paten r 2,881,188 DRY POWDER ,n in ien w nni a ay No-Drawing.
- the dry powder extinguishing medium consists substantially of sulphuric salts of an alkaline metal with ammonium phosphate and bicarbonates.
- the dry powder extinguishing medium may contain, for example, sodium sulphate or ammonium sulphate. It has been found that especially favourable efiects can be obtained if the ammonium sulphate and the am- 2,881,138 R en es Aprmoniumphosphate are added .to the drypowderfire extinguishing medium in the form of a compound crystallisate.
- This compound crystallisate is produced ginlthe following manner:
- Technical calcium phosphates (nat'- ural phosphorites') are bl enediby means ofsiilp'hii 0 acid arid the precipitated slurry of gypsum is th .filtrated.' "From theremaining solution “of "orthopho hone acid” "there is "produced a'compound acid by furtherafid ingof concentrated sulphuric acid.
- gaseous 'ammoriiaor amiixtur'e of gases "containing ammonia until complete neutrahsation.
- Example 1 24 t 72 pa t y we h o a o un s tfil i a e of ammonium phosphate and ammonium siilphateare mixed with 76 to 28 parts by weight of a finely pulverized mixture which contains the following ingredients: sodium bicarbonate, ammonium bicarbonate, oxide of zinc, and precipitated colloidic silicic acid (silica gel). To the mixture there have been finally added small amounts of argentic chloride, stearic acid, and fullers earth.
- the colloidic and finely subdivided silicic acid (silica gel) contained in an intimate mixture with the ammonium bicarbonate acts, due to an especially high and selective adsorptive capacity with respect to C0 and NH continually as a stabilizating substance and prevents the premature sublimation of the ammonium carbonate.
- the sodium silicate which, beside the sodium phosphate, is given birth to on the seat of the fire by thermic effect constitutes a specific effective protection for the glowing remnants of the seat of the fire against their being set again ablaze.
- the small amounts of heavy metal salts (AgCl) contained in the mixture have been recognized as a specific effective anti-catalyst in connection with the other ingredients of the mixture during the combustion process.
- Example 2 30-40 parts by weight of sodium sulphate (Na SO calcined, finely pulverized,
- diammoniumhydrogenphosphate if -technical* are mixed with kg. tric alcium phosphate andground in a sieveless pivot-mill (premixture phosphate).
- a dry powder .adapted,t ,extinguishfires originating from solid, liquid arid'g'as'e ou's' combustible materials consisting essentially ofan' intimate mixture including as essential ingredients at lle'ast 30% by weight, of salts belonging to the group consisting of alkali metal sulfates and ammonium sulfates, a'tfleasft 16 /2 by weight of an ammonium phosphate, at
- a dry power adapted to extinguish fires originating from. solid, liquid and, gaseous combustible materials consisting essentially v v i v 4 1 of an intimate mixture of between 30 and parts by weight of sodium sulfate, between 25 and 35 .parts by weight of diammonium phosphate, and between and 25 parts by weight of ammonium bicarbonate, said mixture being adapted to extinguish fires originating from solid, liquid and gaseous substances and when applied to burning solid material to extinguish glowingportions thereof.
- a dry powder adapted to extinguish fires originating from solid, liquid and gaseous combustible materials consisting essentially of an intimate mixture of approximately 64 parts by weight of ammonium'sulfate," approximately 16.5 parts by weight'of-diammonium hydrogen phosphate, approximately 2.5 parts by weight of tri-calcium phosphate, approximately 16' parts by weight of sodium bicarbonate and approximately 1 part by weight of magnesium stearate, said mixture being adapted to extinguish fires origi- Rating-non solid, liquid-and gaseous substances and when applied to' bur'ning solid material to extinguish glowing portions thereof.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fireproofing Substances (AREA)
Description
n tcd S ates Paten r 2,881,188 DRY POWDER ,n in ien w nni a ay No-Drawing. pplicatio Ma lzal ass S i l 89 55495115 Claims priority, application GermanyMayQl, 1 954 =3 laims- 1 -115 Th in n ef s. o ay l pwde st ex n uis in; m di m which ex n uish r --ti s co qu d a d Lea eous substances as well as fires"o f 5olid substanceswhich give birth to glowingremnants when b g. There have already been 'frnade fknown powder fire extinguishing mediums of th'e inost walnuts compositions:
almjostall powder-like chemicals which are available for not too highprices have beep proposed for thistpurpose.
"fires and which is able to gexti'nguish, beside fifires of liquid and gaseous substances, alsodires of solid 'substances, i.e. in which glowing remnants are given birth to.
According to the invention, the dry powder extinguishing medium consists substantially of sulphuric salts of an alkaline metal with ammonium phosphate and bicarbonates. When using the new dry powder fire extinguishing medium, there takes place beside the mechanical extinguishing effect known with all dry powder extinguishing mediums also, due to the extinguishing mediums violently striking upon the seat of the fire under the action of the propelling agent, the following specific effect: above the seat of the fire a cloud of extinguishing gas smothering the fire springs up, and, in addition, when .solid substances burn, the burning object is covered with a thick crust which prevents the respective object to be set again ablaze. This incrustation takes place above all because in the heat of the seat of the fire there is given birth to an easily flowing fluid of molten sodium metaphosphate (NaPO which is produced intermediarily from the acidic sodium pyrophosphate which has formed as an intermediate product, and some sodiumsilicate.
It is already known, it is true, that bicarbonates, such as sodium bicarbonate, give off on the seat of the fire gaseous carbonic acid which assists the extinguishing effect. It has also been proposed to use ammonium phosphate in aqueous solution for the production of coatings serving to check or stop the spread of the fire. As contrasted therewith, it is new in the present invention to use the abovenamed ingredients in the respective combination in powder-like state as a dry powder extinguishing medium, whereby now a dry powder extinguishing medium is available which can be used with fires of all kinds such as it has been striven for by the skilled in the art already for a long time and without any practical success.
The dry powder extinguishing medium may contain, for example, sodium sulphate or ammonium sulphate. It has been found that especially favourable efiects can be obtained if the ammonium sulphate and the am- 2,881,138 R en es Aprmoniumphosphate are added .to the drypowderfire extinguishing medium in the form of a compound crystallisate. This compound crystallisate is produced ginlthe following manner: Technical calcium phosphates (nat'- ural phosphorites') are bl enediby means ofsiilp'hii 0 acid arid the precipitated slurry of gypsum is th .filtrated.' "From theremaining solution "of "orthopho hone acid "there is "produced a'compound acid by furtherafid ingof concentrated sulphuric acid. Into 'this jcompoun'd acid there is introduced gaseous 'ammoriiaor amiixtur'e of gases "containing ammonia until complete neutrahsation. Hereafter, "the solution of concentrated e nipbnim salts produced in this 'way is broken up ffinely to a d .fi ry i po e y the oppo l 'ili of'the rising warm It is also'possible to 19w tempe a w dyi t lgmr fiad q y ,tallis'ate obtained directly from the solution.
"The mo ne mix e o amm um ,nh s ha c and amm i m l a Pr d d ad s n 10 the ahovesaid method is nothygroscopic and totally neutral. I does no o n e a t e o ee d le tin s- :T ext hing p de a ni g h [cl b ur: crystallisate has, therefore, .beside .its surprising exfjt ns in e s n p c a y oo w n c pa ty arid'canbe stored even for a very long :time.
"The ftollo'w'ing .examples illustrate .theinyention:
Example 1 24 t 72 pa t y we h o a o un s tfil i a e of ammonium phosphate and ammonium siilphateare mixed with 76 to 28 parts by weight of a finely pulverized mixture which contains the following ingredients: sodium bicarbonate, ammonium bicarbonate, oxide of zinc, and precipitated colloidic silicic acid (silica gel). To the mixture there have been finally added small amounts of argentic chloride, stearic acid, and fullers earth.
The colloidic and finely subdivided silicic acid (silica gel) contained in an intimate mixture with the ammonium bicarbonate acts, due to an especially high and selective adsorptive capacity with respect to C0 and NH continually as a stabilizating substance and prevents the premature sublimation of the ammonium carbonate. At the same time, the sodium silicate which, beside the sodium phosphate, is given birth to on the seat of the fire by thermic effect constitutes a specific effective protection for the glowing remnants of the seat of the fire against their being set again ablaze. The small amounts of heavy metal salts (AgCl) contained in the mixture have been recognized as a specific effective anti-catalyst in connection with the other ingredients of the mixture during the combustion process.
Example 2 30-40 parts by weight of sodium sulphate (Na SO calcined, finely pulverized,
25-35 parts by weight di-ammonium phosphate, finely pulverized, and
4525 parts by weight of a finely pulverized mixture consisting of ammonium bicarbonate, oxide of zinc, and silica gel.
To the abovenamed mixture there are added small amounts of argentic chloride, stean'c acid, and fullers earth.
Example 3 kg. ammonium sulphate ((NH SO of technical quality are mixed with 3 kg. tricalcium phosphate and ground in a sieveless pivot mill (premixture sulphate).
100 kg. diammoniumhydrogenphosphate (if -technical* are mixed with kg. tric alcium phosphate andground in a sieveless pivot-mill (premixture phosphate).
the. examples illustrated,.but I-desire it to be under- I stood that I reservethe privilege of resorting to all changes to-which the invention is susceptible, this latter being defined andlimited only by the terms of the ap pended claimsi, i I
Haying thus described the invention, what I claim as new, and desire-to secure by Letters Patent is:
' '1; As a new composition-of matter, a dry powder .adapted,t ,extinguishfires originating from solid, liquid arid'g'as'e ou's' combustible materials, consisting essentially ofan' intimate mixture including as essential ingredients at lle'ast 30% by weight, of salts belonging to the group consisting of alkali metal sulfates and ammonium sulfates, a'tfleasft 16 /2 by weight of an ammonium phosphate, at
least 16% by weight of a bicarbonate, said mixture being adapted to extinguish fires originating from solid, liquid and gaseous'suhstances and, when applied tolburning solid material to extinguish glowing portions thereof.
2. As a new composition of matter, a dry power adapted to extinguish fires originating from. solid, liquid and, gaseous combustible materials, consisting essentially v v i v 4 1 of an intimate mixture of between 30 and parts by weight of sodium sulfate, between 25 and 35 .parts by weight of diammonium phosphate, and between and 25 parts by weight of ammonium bicarbonate, said mixture being adapted to extinguish fires originating from solid, liquid and gaseous substances and when applied to burning solid material to extinguish glowingportions thereof. I I v '3'. As anew composition of matter, a dry powder adapted to extinguish fires originating from solid, liquid and gaseous combustible materials, consisting essentially of an intimate mixture of approximately 64 parts by weight of ammonium'sulfate," approximately 16.5 parts by weight'of-diammonium hydrogen phosphate, approximately 2.5 parts by weight of tri-calcium phosphate, approximately 16' parts by weight of sodium bicarbonate and approximately 1 part by weight of magnesium stearate, said mixture being adapted to extinguish fires origi- Rating-non solid, liquid-and gaseous substances and when applied to' bur'ning solid material to extinguish glowing portions thereof.
' References Cited in the file of this patent UNITED STATES PATENTS 502,867 Schuler Aug. 8, 1893 1,271,506 "Ferguson July 2, 1918 1,793,420 v Block Feb. 17, 1931 2,472,539 I 'McGlenn June 7, 1949 -2-,7 68,'952 Anthony Oct. 30, 1956 1 FOREIGN PATENTS 73s Great Britain 1901 721,168 Great Britain 1909 Great ta n. -.-,-.--.-.a-.- Ma .2
Claims (1)
1. 3. AS A NEW COMPOSITION OF MATTER, A DRY POWDER ADAPTED TO EXTINGUISH FIRES ORIGINATING FROM SOLID, LIQUID AND GASEOUS COMBUSATIBLE MATERIALS, CONSISTING ESSENTIALLY OF AN INTIMATE MIXTURE OF APPROXIMATELY 64 PARTS BY WEIGHT OF AMMONIUM SULFATE, APPROXIMATELY 16.5 PARTS BY WEIGHT OF DIAMMONIUM HYDROGEN PHOSPHATE, APPROXIMATELY 2.5 PARTS BY WEIGHT OF TRI-CALCIUM PHOSPHATE, APPROXIMATELY 16 PARTS BY WEIGHT OF SODIUM BICARBONATE AND APPROXIMATELY 1 PART BY WEIGHT OF MAGNESIUM STEARATE, SAID MIXTURE BEING ADAPTED TO EXTINGUISH FIRES ORIGINATING FROM SOLID, LIQUID AND GASEOUS SUBSTANCES AND WHEN APPLIED TO BURNING SOLID MATERIAL TO EXTINGUISH GLOWING PORTIONS THEREOF.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2881138X | 1954-05-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2881138A true US2881138A (en) | 1959-04-07 |
Family
ID=8000334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US510515A Expired - Lifetime US2881138A (en) | 1954-05-21 | 1955-05-23 | Dry powder fire extinguishing medium |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2881138A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2996119A (en) * | 1957-08-12 | 1961-08-15 | Pyrene Co Ltd | Fire-extinguishing apparatus and method |
| US3017348A (en) * | 1958-01-22 | 1962-01-16 | Chem Fab Grunau Ag | Fire extinguishing compositions |
| US3055435A (en) * | 1959-02-06 | 1962-09-25 | Ansul Chemical Co | Dry chemical fire extinguishers |
| US3063940A (en) * | 1959-04-10 | 1962-11-13 | Nu Swift Ltd | Fire extinguishing composition |
| US3179588A (en) * | 1960-12-19 | 1965-04-20 | Gen Fire Extinguisher Corp | Powdered fire extinguishing composition |
| US9410087B2 (en) | 2012-06-26 | 2016-08-09 | Solvay Sa | Fungicidal and parasiticidal fire-retardant powder |
| US9426984B2 (en) | 2010-12-22 | 2016-08-30 | Solvay Sa | Fungicidal and parasiticidal fire-retardant powder |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US502867A (en) * | 1893-08-08 | Fireproofing compound | ||
| GB190100738A (en) * | 1901-01-11 | 1901-06-15 | Richard Hoult | Improvements in and connected with Fire Extinguishing Substances. |
| GB190921168A (en) * | 1909-09-16 | 1910-09-15 | Luke Henry Woods | A Fire Extinguishing Powder. |
| US1271506A (en) * | 1913-11-18 | 1918-07-02 | Pyrene Mfg Co | Fire-extinguishing and firefroofing composition. |
| US1793420A (en) * | 1928-09-22 | 1931-02-17 | Gas Fire Extinguisher Corp Du | Fire-extinguishing material |
| GB543702A (en) * | 1939-09-06 | 1942-03-09 | Pioneer Parachute Co | Improvements in parachutes |
| US2472539A (en) * | 1946-05-18 | 1949-06-07 | American La France Foamite | Fire extinguishing powder |
| US2768952A (en) * | 1954-05-05 | 1956-10-30 | Specialties Dev Corp | Composition for and method of extinguishing light metal fires |
-
1955
- 1955-05-23 US US510515A patent/US2881138A/en not_active Expired - Lifetime
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US502867A (en) * | 1893-08-08 | Fireproofing compound | ||
| GB190100738A (en) * | 1901-01-11 | 1901-06-15 | Richard Hoult | Improvements in and connected with Fire Extinguishing Substances. |
| GB190921168A (en) * | 1909-09-16 | 1910-09-15 | Luke Henry Woods | A Fire Extinguishing Powder. |
| US1271506A (en) * | 1913-11-18 | 1918-07-02 | Pyrene Mfg Co | Fire-extinguishing and firefroofing composition. |
| US1793420A (en) * | 1928-09-22 | 1931-02-17 | Gas Fire Extinguisher Corp Du | Fire-extinguishing material |
| GB543702A (en) * | 1939-09-06 | 1942-03-09 | Pioneer Parachute Co | Improvements in parachutes |
| US2472539A (en) * | 1946-05-18 | 1949-06-07 | American La France Foamite | Fire extinguishing powder |
| US2768952A (en) * | 1954-05-05 | 1956-10-30 | Specialties Dev Corp | Composition for and method of extinguishing light metal fires |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2996119A (en) * | 1957-08-12 | 1961-08-15 | Pyrene Co Ltd | Fire-extinguishing apparatus and method |
| US3017348A (en) * | 1958-01-22 | 1962-01-16 | Chem Fab Grunau Ag | Fire extinguishing compositions |
| US3055435A (en) * | 1959-02-06 | 1962-09-25 | Ansul Chemical Co | Dry chemical fire extinguishers |
| US3063940A (en) * | 1959-04-10 | 1962-11-13 | Nu Swift Ltd | Fire extinguishing composition |
| US3179588A (en) * | 1960-12-19 | 1965-04-20 | Gen Fire Extinguisher Corp | Powdered fire extinguishing composition |
| US9426984B2 (en) | 2010-12-22 | 2016-08-30 | Solvay Sa | Fungicidal and parasiticidal fire-retardant powder |
| US9410087B2 (en) | 2012-06-26 | 2016-08-09 | Solvay Sa | Fungicidal and parasiticidal fire-retardant powder |
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