US3258373A - Plastic pyrotechnic compositions containing strontium perchlorate and acrylic polymer - Google Patents
Plastic pyrotechnic compositions containing strontium perchlorate and acrylic polymer Download PDFInfo
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- US3258373A US3258373A US381592A US38159264A US3258373A US 3258373 A US3258373 A US 3258373A US 381592 A US381592 A US 381592A US 38159264 A US38159264 A US 38159264A US 3258373 A US3258373 A US 3258373A
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- monomer
- strontium perchlorate
- gms
- perchlorate
- strontium
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- MXRFIUHRIOLIIV-UHFFFAOYSA-L strontium;diperchlorate Chemical compound [Sr+2].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O MXRFIUHRIOLIIV-UHFFFAOYSA-L 0.000 title claims description 31
- 239000000203 mixture Substances 0.000 title claims description 26
- 229920000058 polyacrylate Polymers 0.000 title claims description 4
- 239000004033 plastic Substances 0.000 title description 6
- 239000000178 monomer Substances 0.000 description 32
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 17
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical group COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 13
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 11
- 229910052749 magnesium Inorganic materials 0.000 description 11
- 239000011777 magnesium Substances 0.000 description 11
- 239000000446 fuel Substances 0.000 description 10
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 7
- 239000000779 smoke Substances 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 description 4
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- -1 oxidizers Substances 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- NIQCNGHVCWTJSM-UHFFFAOYSA-N Dimethyl phthalate Chemical compound COC(=O)C1=CC=CC=C1C(=O)OC NIQCNGHVCWTJSM-UHFFFAOYSA-N 0.000 description 2
- 239000004471 Glycine Substances 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001631 strontium chloride Inorganic materials 0.000 description 2
- AHBGXTDRMVNFER-UHFFFAOYSA-L strontium dichloride Chemical compound [Cl-].[Cl-].[Sr+2] AHBGXTDRMVNFER-UHFFFAOYSA-L 0.000 description 2
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Chemical compound [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- VKEQBMCRQDSRET-UHFFFAOYSA-N Methylone Chemical compound CNC(C)C(=O)C1=CC=C2OCOC2=C1 VKEQBMCRQDSRET-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000001768 cations Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000012933 diacyl peroxide Substances 0.000 description 1
- FBSAITBEAPNWJG-UHFFFAOYSA-N dimethyl phthalate Natural products CC(=O)OC1=CC=CC=C1OC(C)=O FBSAITBEAPNWJG-UHFFFAOYSA-N 0.000 description 1
- 229960001826 dimethylphthalate Drugs 0.000 description 1
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 1
- 150000002976 peresters Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
- KQAGKTURZUKUCH-UHFFFAOYSA-L strontium oxalate Chemical compound [Sr+2].[O-]C(=O)C([O-])=O KQAGKTURZUKUCH-UHFFFAOYSA-L 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C15/00—Pyrophoric compositions; Flints
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B29/00—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate
- C06B29/02—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal
- C06B29/08—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal with an organic non-explosive or an organic non-thermic component
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
- C08F20/10—Esters
- C08F20/12—Esters of monohydric alcohols or phenols
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S149/00—Explosive and thermic compositions or charges
- Y10S149/116—Flare contains resin
Definitions
- the present invention relates to plastic pyrotechnic compositions and more particularly to plastic pyrotechnic composition that are pour castable and upon solidi-fi cation form pyrotechnics that are long burning.
- one method ofmanufacturin-g pyrotechnic articles consisted of filling a hollow tube or container with a combustible mixture in powder form and then subjecting the mixture to a very high pressure.
- the resulting product has a density depending upon various conditions such as the type of mixture and the amount and duration of the pressure applied.
- Such pyrotechnic articles show wide variations in their rate of combustion.
- strontium perchlorate is added to an acrylic monomer.
- the portion of the strontium perchlorate that dissolves in the acrylic monomer acts as an activator to prepolymerize the acrylic monomer.
- the undissolved strontium perchlorate remains suspended in solid form in the prepolymerized acrylic monomer.
- Various fuels, oxidizing agents, and coloring agents are next added to the partially polymerized monomer, and a catalyst is then added to facilitate complete polymerization.
- Another object of the present invention is to provide a pyrotechnic material which has an essentially constant rate of burning.
- a further object of the present invention is to provide a long burning colored flare that can be readily manufactured.
- strontium perchlorate will dissolve in acrylic monomers, such as the esters of acrylic and met-hacrylic acids. At room temperature, about 18 parts of anhydrous strontium perchlorate will dissolve in 100 parts of methyl methacrylate monomer. It has been discovered, however, that the degree of solubility is related to the amount of moisture contained in the oxidant. Maximum solubility occurs when about 2.2 percent of moisture is present in the oxidant. Upon mixing the desired amount of oxidant with the acrylic monomer, prepoly-mer is readily formed, accompanied by heat evolution. This results in an increase in viscosity of the mixture.
- this reaction occurs without the need of an organic catalyst, and if the process is not regulated as to the degree of solubility and temperature, a hard polymeric mass will be formed. From a production standpoint, this prepolymerization feature is an asset for because of the increase in density and viscosity of the monomer other insoluble ingredients will remain suspended in the viscous blended mass without appreciable settling prior to polymerization.
- strontium perchlorate acts both as an activator and a catalyst in that small amounts of strontium perchlorate when added to an acrylic monomer, will shorten the induction time normally required to polymerize the monomer, and also the temperature required to polymerize the monomer is less.
- strontium perchlorate dissolves in the monomer, there is provided a solution which serves both as a fuel and anoxidizing agent.
- Example I 50 ml. of methyl methacrylate monomer 165 gms. of strontium perchlorate 3 drops of cumene hydroperoxide The ratio, by weight, of monomer to strontium perchlorate is about 1 to 3.5.
- the mixture was heated in an oven for 12 hours at a temperature of 75 degrees C.
- a candle was prepared in a fish paper tube having an inside diameter of 1.76 inches, and atwo-inch candle burned for seconds. The flame was about 24 inches high and very bright red in color. A white smoke was produced and there Was, almost no ash.
- Example III ml. of methyl methacrylate monomer 50 gms. of strontium perchlorate 50 gms. of magnesium- (atomized) 20 drops of Lupersol DDM
- the ratio, by weight, of monomer to strontium perchlorate is about 1 to 1.08.
- the mixture was heated in an oven for 24 hours at a temperature of 75 degrees C.
- a candle was prepared as in Example I, and the burning time was seconds. The flame was between 12 and 18 inches high and was a. very bright red. A white smoke was produced.
- Example IV 50 ml. of methyl methacrylate monomer 50 gms. of strontium perchlorate 50 gms. of magnesium (atomized) 30 gms. of strontium carbonate 6 drops of Lupersol DDM The ratio, by weight, of monomer to strantium perchlorate was about 1 to 1.08. The mixture was heated in an over for 24 hours at a temperature of 75 degrees C. A candle was prepared as in Example I and theburning time was 35 seconds. The flame was between 12 and 18 inches high and was a very bright red. A white smoke was produced.
- Example V 50 ml. of methyl methacrylate monomer 10 gms. of strontium perchlorate 50 gms. of magnesium (atomized) 40 gms. of strontium nitrate 30 drops of Lupersol DDM The ratio, by weight, of monomer to strontium perchlorate was about 1 to 0.21. The mixture was heated in an oven for 24 hours at a temperature of 75 degrees C. A candle was prepared as in Example I, and the burning time was 22 seconds. The flame was between 12 and 18 inches high and was a very bright red. A white smoke was produced.
- Example VI '47 ml. of methyl methacrylate monomer 75 gms. of strontium perchlorate 30 gms. of magnesium (atomized) 15 gms. of aluminum (atomized) 3 drops of Lupersol DDM The ratio, by weight, of monomer to strontium perchlorate was about 1 to 1.7. The mixture was heated in an oven for 24 hours at a temperature of 55 degrees C. A candle was prepared as in Example I and the burning time was 125 seconds. The flame was about 12 inches high and was a very bright red. A white smoke was produced.
- Example VII 50 ml. of methyl methacrylate monomer 83.7 gms. of strontium perchlorate 52.3 gms. of magnesium (atomized) 3 drops Lupersol DDM The ratio, by weight, of monomer to strontium perchlorate was about 1 to 1.79. The mixture was heated in an oven for 24 hours at a temperature of 55 degrees C. A candle was prepared as in Example I and the burning time was 110 seconds. The flame was about 12 inches high and was a very bright red. A white smoke was produced.
- Example VIII 28 ml. of methyl methacrylate monomer 14 ml. of styrene monomer 90 gms. of strontium perchlorate gms. of magnesium (atomized) 30 gms. of glycine 3 drops of cumene hydroperoxide 4
- Example IX 5 6 ml. of methyl methacrylate monomer gms. of strontium perchlorate 25 gms. of magnesium (atomized) 45 gms. of sulfur 10 gms. of anhydrous strontium chloride 2 drops of cumene hydroperoxide The mixture was heated in an oven for-20 hours at 75 degrees C. A candle was made as in Example I and the burning time was 7 minutes.
- compositions with a high magnesium content burn relatively rapid and are very hot.
- the addition of sulfur to the mixture increases the burning time, as demonstrated by Example IX.
- Sulfur is best used in a range of 0.25-0.75 part of sulfur per one part of monomer.
- the acrylic monomer is normally first mixed with the strontium perchlorate and that portion of strontium perchlorate which dissolves in the monomer causes the monomer to partially polymerize. A portion of the strontium perchlorate will dissolve in the acrylic monomer and, at room temperature, about 18 parts of anhydrous strontium perchlorate will dissolve in parts of acrylic monomer. The partial polymerization of the monomer causes an increase in the viscosity of the mixture and the fuel and other ingredients are then added. The increased viscosity of the mixture prevents the fuel and other undissolved ingredients from settling and consequently, a more homogenous product is produced. Pyrotechnic candles that provide adequate candlepower when burned, and also, that have a long burning time, have been prepared by maintaining a ratio of between 1 and 3.3 parts, by weight, of strontium perchlorate to one part, by weight, of acrylic monomer.
- the ratio of fuel to monomer is also critical for military applications in that too small an amount of fuel will result in low average candlepower, while too large an amount of fuel will cause very rapid burning and consequently, too short a burning time.
- a military specification requires a minimum average candlepower of 20,000 and a minimum burning time of 23 seconds.
- the ratio of fuel to monomer should be between about 0.2 and 2.0 parts of fuel to one part of acrylic monomer.
- a consumable pyrotechnic composition comprising:
- a consumable pyrotechnic composition as set forth in claim 1 having uniformly dispersed therein in a finely divided form between 0.2 and 2.0 parts, by weight, of magnesium.
- a consumable pyrotechnic composition as set forth in claim 1 having uniformly dispersed therein in a finely divided form between 0.2 and 2.0 parts, by weight, of aluminum.
- a consumable pyrotechnic composition as set forth in claim 1 having uniformly dispersed therein in a finely divided form between 0.2 and 2.0 parts, by weight, of magnesium and between 0.25 and 0.75 part, by weight, of sulfur.
- a consumable pyrotechnic composition as set forth in claim 1 having uniformly dispersed therein in a finely divided form between 0.2 and 2.0 parts, by weight, of magnesium and between 0.25 and 0.75 part, by weight, of glycine.
- a consumable pyrotechnic composition comprising: 5
- polymer consisting of two-thirds methyl methacrylate and one-third styrene
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- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Description
United States Patent 3 258 373 PLASTIC rrnorncniuc coMrosrrroNs coN- TAINING STRQNTIUM PERCHLGRATE AND ACRYLIC POLYMER Bernard E. Douda, Bloomfield, Ind., assignor to the United States of America as represented by the Secretary of the Navy No Drawing. Filed July 9, 1964, Ser. No. 381,592 6 Claims. (Cl. 149-19) The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.
The present invention relates to plastic pyrotechnic compositions and more particularly to plastic pyrotechnic composition that are pour castable and upon solidi-fi cation form pyrotechnics that are long burning.
Heretofore, one method ofmanufacturin-g pyrotechnic articles consisted of filling a hollow tube or container with a combustible mixture in powder form and then subjecting the mixture to a very high pressure. The resulting product has a density depending upon various conditions such as the type of mixture and the amount and duration of the pressure applied. Such pyrotechnic articles show wide variations in their rate of combustion.
In order to overcome the disadvantages of compacted pyrotechnic articles, recent developments in the pyrotechnic art has produced various plastic type compounds that can be cast or molded. One such plastic compound is described in US. Patent 2,984,558, which issued May 16, 1961, to Edward Rolle and John Q. Tabor. This patented compound is essentially a mixture of unsaturated polyester resins to which is added a stabilizing ingredient, oxidizers, and a fuel.
In the present invention strontium perchlorate is added to an acrylic monomer. The portion of the strontium perchlorate that dissolves in the acrylic monomer acts as an activator to prepolymerize the acrylic monomer. The undissolved strontium perchlorate remains suspended in solid form in the prepolymerized acrylic monomer. Various fuels, oxidizing agents, and coloring agents are next added to the partially polymerized monomer, and a catalyst is then added to facilitate complete polymerization.
It is therefore a general object of the present invention 'to provide an improved pyrotechnic material which may be readily cast or molded.
Another object of the present invention is to provide a pyrotechnic material which has an essentially constant rate of burning.
A further object of the present invention is to provide a long burning colored flare that can be readily manufactured.
Other objects and advantages of the present invention will be readily appreciated as the same becomes better understood by reference to the following description.
It has been found that strontium perchlorate will dissolve in acrylic monomers, such as the esters of acrylic and met-hacrylic acids. At room temperature, about 18 parts of anhydrous strontium perchlorate will dissolve in 100 parts of methyl methacrylate monomer. It has been discovered, however, that the degree of solubility is related to the amount of moisture contained in the oxidant. Maximum solubility occurs when about 2.2 percent of moisture is present in the oxidant. Upon mixing the desired amount of oxidant with the acrylic monomer, prepoly-mer is readily formed, accompanied by heat evolution. This results in an increase in viscosity of the mixture. This reaction occurs without the need of an organic catalyst, and if the process is not regulated as to the degree of solubility and temperature, a hard polymeric mass will be formed. From a production standpoint, this prepolymerization feature is an asset for because of the increase in density and viscosity of the monomer other insoluble ingredients will remain suspended in the viscous blended mass without appreciable settling prior to polymerization.
The strontium perchlorate acts both as an activator and a catalyst in that small amounts of strontium perchlorate when added to an acrylic monomer, will shorten the induction time normally required to polymerize the monomer, and also the temperature required to polymerize the monomer is less. When the strontium perchlorate dissolves in the monomer, there is provided a solution which serves both as a fuel and anoxidizing agent.
The following examples are illustrative of the invention. In each of the examples, the monomer used was methyl methacrylate that was inhibited with 25 p.p.-m. hydroquinone, however, it should be understood, of course, that other esters of acrylic acid and methacrylic acid will work equally as well.
Example I 50 ml. of methyl methacrylate monomer 165 gms. of strontium perchlorate 3 drops of cumene hydroperoxide The ratio, by weight, of monomer to strontium perchlorate is about 1 to 3.5. The mixture was heated in an oven for 12 hours at a temperature of 75 degrees C. A candle was prepared in a fish paper tube having an inside diameter of 1.76 inches, and atwo-inch candle burned for seconds. The flame was about 24 inches high and very bright red in color. A white smoke was produced and there Was, almost no ash.
Example [I 45 ml. of methyl methacrylate monomer gms. of strontium perchlorate 30 gms. of magnesium (atomized) gms. of anhydrous strontium oxalate 10 gms. of anhydrous strontium chloride drop of Lupersol DDM (a solution of 60% methylethylketone peroxide in dimethylphthalate) Example III ml. of methyl methacrylate monomer 50 gms. of strontium perchlorate 50 gms. of magnesium- (atomized) 20 drops of Lupersol DDM The ratio, by weight, of monomer to strontium perchlorate is about 1 to 1.08. The mixture was heated in an oven for 24 hours at a temperature of 75 degrees C. A candle was prepared as in Example I, and the burning time was seconds. The flame was between 12 and 18 inches high and was a. very bright red. A white smoke was produced.
3 Example IV 50 ml. of methyl methacrylate monomer 50 gms. of strontium perchlorate 50 gms. of magnesium (atomized) 30 gms. of strontium carbonate 6 drops of Lupersol DDM The ratio, by weight, of monomer to strantium perchlorate was about 1 to 1.08. The mixture was heated in an over for 24 hours at a temperature of 75 degrees C. A candle was prepared as in Example I and theburning time was 35 seconds. The flame was between 12 and 18 inches high and was a very bright red. A white smoke was produced.
Example V 50 ml. of methyl methacrylate monomer 10 gms. of strontium perchlorate 50 gms. of magnesium (atomized) 40 gms. of strontium nitrate 30 drops of Lupersol DDM The ratio, by weight, of monomer to strontium perchlorate was about 1 to 0.21. The mixture was heated in an oven for 24 hours at a temperature of 75 degrees C. A candle was prepared as in Example I, and the burning time was 22 seconds. The flame was between 12 and 18 inches high and was a very bright red. A white smoke was produced.
Example VI '47 ml. of methyl methacrylate monomer 75 gms. of strontium perchlorate 30 gms. of magnesium (atomized) 15 gms. of aluminum (atomized) 3 drops of Lupersol DDM The ratio, by weight, of monomer to strontium perchlorate was about 1 to 1.7. The mixture was heated in an oven for 24 hours at a temperature of 55 degrees C. A candle was prepared as in Example I and the burning time was 125 seconds. The flame was about 12 inches high and was a very bright red. A white smoke was produced.
Example VII 50 ml. of methyl methacrylate monomer 83.7 gms. of strontium perchlorate 52.3 gms. of magnesium (atomized) 3 drops Lupersol DDM The ratio, by weight, of monomer to strontium perchlorate was about 1 to 1.79. The mixture was heated in an oven for 24 hours at a temperature of 55 degrees C. A candle was prepared as in Example I and the burning time was 110 seconds. The flame was about 12 inches high and was a very bright red. A white smoke was produced.
Example VIII 28 ml. of methyl methacrylate monomer 14 ml. of styrene monomer 90 gms. of strontium perchlorate gms. of magnesium (atomized) 30 gms. of glycine 3 drops of cumene hydroperoxide 4 Example IX 5 6 ml. of methyl methacrylate monomer gms. of strontium perchlorate 25 gms. of magnesium (atomized) 45 gms. of sulfur 10 gms. of anhydrous strontium chloride 2 drops of cumene hydroperoxide The mixture was heated in an oven for-20 hours at 75 degrees C. A candle was made as in Example I and the burning time was 7 minutes.
As can be seen from the foregoing examples, compositions with a high magnesium content burn relatively rapid and are very hot. The addition of sulfur to the mixture increases the burning time, as demonstrated by Example IX. Sulfur is best used in a range of 0.25-0.75 part of sulfur per one part of monomer.
While the foregoing examples list methyl methacrylate as the monomer which is polymerized, strontium perchlorate mixes equally as well when mixed in solution With acrylic acid, methacrylic acid and esters of acrylic acid and methacrylic acid, such as methyl acrylate and ethyl acrylate. Also, while the examples listed above were catalyzed with either cumene hydroperoxide or Lupersol DDM there are many more commonly known catalysts that promote polymerization of acrylic monomers. Included among the known catalysts are diacyl peroxides, ketone peroxides, alkyl hydroperoxides, alkyl peresters, and alkyl acid peresters. Various effects can be obtained by the use of ditferentcatalysts and also combination of catalysts can produce effects not readily available with any single catalyst.
In preparation, the acrylic monomer is normally first mixed with the strontium perchlorate and that portion of strontium perchlorate which dissolves in the monomer causes the monomer to partially polymerize. A portion of the strontium perchlorate will dissolve in the acrylic monomer and, at room temperature, about 18 parts of anhydrous strontium perchlorate will dissolve in parts of acrylic monomer. The partial polymerization of the monomer causes an increase in the viscosity of the mixture and the fuel and other ingredients are then added. The increased viscosity of the mixture prevents the fuel and other undissolved ingredients from settling and consequently, a more homogenous product is produced. Pyrotechnic candles that provide adequate candlepower when burned, and also, that have a long burning time, have been prepared by maintaining a ratio of between 1 and 3.3 parts, by weight, of strontium perchlorate to one part, by weight, of acrylic monomer.
The ratio of fuel to monomer is also critical for military applications in that too small an amount of fuel will result in low average candlepower, while too large an amount of fuel will cause very rapid burning and consequently, too short a burning time. For one red flare, for example, a military specification requires a minimum average candlepower of 20,000 and a minimum burning time of 23 seconds. In order to meet both of these requirements, the ratio of fuel to monomer should be between about 0.2 and 2.0 parts of fuel to one part of acrylic monomer.
Obviously many modifications and variations of the present invention are possible in the light of the above teachings. It is therefore to be understood, that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.
What is claimed is:
- 1. A consumable pyrotechnic composition comprising:
one part, by weight, of an acrylic polymer, and between one and 3.3 parts, byweight, of strontium perchlorate.
2. A consumable pyrotechnic composition as set forth in claim 1 having uniformly dispersed therein in a finely divided form between 0.2 and 2.0 parts, by weight, of magnesium.
3. A consumable pyrotechnic composition as set forth in claim 1 having uniformly dispersed therein in a finely divided form between 0.2 and 2.0 parts, by weight, of aluminum.
4. A consumable pyrotechnic composition as set forth in claim 1 having uniformly dispersed therein in a finely divided form between 0.2 and 2.0 parts, by weight, of magnesium and between 0.25 and 0.75 part, by weight, of sulfur.
5. A consumable pyrotechnic composition as set forth in claim 1 having uniformly dispersed therein in a finely divided form between 0.2 and 2.0 parts, by weight, of magnesium and between 0.25 and 0.75 part, by weight, of glycine.
6. A consumable pyrotechnic composition comprising: 5
B. R. PADGETT, Assistant Examiner.
one part, by weight, of polymer consisting of two-thirds methyl methacrylate and one-third styrene,
References Cited by the Examiner UNITED STATES PATENTS Rolle et al. Q 149--19 Cobb et al. 14919 Godsey 149-83 Cadwallader 149-19 LEON D. ROSDOL, Primary Examiner.
Claims (1)
1. A COMSUMABLE PYROTECHNIC COMPOSITION EOMPRISING: ONE PART, BY WEIGHT, OF AN ACRYLIC POLYMER, AND BETWEEN ONE AND 3.3 PARTS, BY WEIGHT, OF STRONTIUM PERCHLORATE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US381592A US3258373A (en) | 1964-07-09 | 1964-07-09 | Plastic pyrotechnic compositions containing strontium perchlorate and acrylic polymer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US381592A US3258373A (en) | 1964-07-09 | 1964-07-09 | Plastic pyrotechnic compositions containing strontium perchlorate and acrylic polymer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3258373A true US3258373A (en) | 1966-06-28 |
Family
ID=23505612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US381592A Expired - Lifetime US3258373A (en) | 1964-07-09 | 1964-07-09 | Plastic pyrotechnic compositions containing strontium perchlorate and acrylic polymer |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3258373A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3322583A (en) * | 1964-07-20 | 1967-05-30 | Exxon Research Engineering Co | Solid propellant composition containing copolymer binder of acrylonitrile-acrylate |
| US3411963A (en) * | 1967-07-31 | 1968-11-19 | Navy Usa | Illuminating flare composition composed of magnesium, sodium nitrate, and an epoxy resin-polyglycol resin binder |
| US3432370A (en) * | 1967-08-24 | 1969-03-11 | Dow Chemical Co | Flare composition containing alkali metal nitrate,magnesium,and a copolymer reaction product binder |
| US3461006A (en) * | 1967-10-27 | 1969-08-12 | Us Navy | Gelled pyrotechnic flare composition containing water-soluble carboxy vinyl polymer resin |
| US3462325A (en) * | 1968-10-24 | 1969-08-19 | Us Navy | Flare composition comprising magnesium,sodium perchlorate,and a ternary organic binder |
| US3464869A (en) * | 1967-12-13 | 1969-09-02 | American Cyanamid Co | Pyrotechnic compositions containing metal fuel,inorganic oxidizer salt,and a vinyl polymer in a solvent |
| JPS52120113A (en) * | 1976-03-29 | 1977-10-08 | Koua Kakou Kk | Process for preparing chemical preparation for communication rocket and simultaneously usable as lighting chemical and propellent |
| US4101352A (en) * | 1971-02-08 | 1978-07-18 | The United States Of America As Represented By The Secretary Of The Navy | Deflagrative electronic component potting compound |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2984558A (en) * | 1957-06-10 | 1961-05-16 | Rolle Edward | Plastic pyrotechnic compound |
| US3109761A (en) * | 1958-04-03 | 1963-11-05 | Phillips Petroleum Co | Easily castable polyurethane propellants containing highly halogenated compounds |
| US3152027A (en) * | 1962-05-29 | 1964-10-06 | Hercules Powder Co Ltd | Heat-resistant propellants |
| US3152935A (en) * | 1956-02-17 | 1964-10-13 | Edgar A Cadwallader | Flare composition |
-
1964
- 1964-07-09 US US381592A patent/US3258373A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3152935A (en) * | 1956-02-17 | 1964-10-13 | Edgar A Cadwallader | Flare composition |
| US2984558A (en) * | 1957-06-10 | 1961-05-16 | Rolle Edward | Plastic pyrotechnic compound |
| US3109761A (en) * | 1958-04-03 | 1963-11-05 | Phillips Petroleum Co | Easily castable polyurethane propellants containing highly halogenated compounds |
| US3152027A (en) * | 1962-05-29 | 1964-10-06 | Hercules Powder Co Ltd | Heat-resistant propellants |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3322583A (en) * | 1964-07-20 | 1967-05-30 | Exxon Research Engineering Co | Solid propellant composition containing copolymer binder of acrylonitrile-acrylate |
| US3411963A (en) * | 1967-07-31 | 1968-11-19 | Navy Usa | Illuminating flare composition composed of magnesium, sodium nitrate, and an epoxy resin-polyglycol resin binder |
| US3432370A (en) * | 1967-08-24 | 1969-03-11 | Dow Chemical Co | Flare composition containing alkali metal nitrate,magnesium,and a copolymer reaction product binder |
| US3461006A (en) * | 1967-10-27 | 1969-08-12 | Us Navy | Gelled pyrotechnic flare composition containing water-soluble carboxy vinyl polymer resin |
| US3464869A (en) * | 1967-12-13 | 1969-09-02 | American Cyanamid Co | Pyrotechnic compositions containing metal fuel,inorganic oxidizer salt,and a vinyl polymer in a solvent |
| US3462325A (en) * | 1968-10-24 | 1969-08-19 | Us Navy | Flare composition comprising magnesium,sodium perchlorate,and a ternary organic binder |
| US4101352A (en) * | 1971-02-08 | 1978-07-18 | The United States Of America As Represented By The Secretary Of The Navy | Deflagrative electronic component potting compound |
| JPS52120113A (en) * | 1976-03-29 | 1977-10-08 | Koua Kakou Kk | Process for preparing chemical preparation for communication rocket and simultaneously usable as lighting chemical and propellent |
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