US3297503A - Cyclotol and thermite explosive composition - Google Patents

Cyclotol and thermite explosive composition Download PDF

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Publication number
US3297503A
US3297503A US489084A US48908465A US3297503A US 3297503 A US3297503 A US 3297503A US 489084 A US489084 A US 489084A US 48908465 A US48908465 A US 48908465A US 3297503 A US3297503 A US 3297503A
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thermite
cyclotol
explosive composition
composition
explosive
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US489084A
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Paul O Hoffmann
Irving L Kintish
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Paul O Hoffmann
Irving L Kintish
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    • CCHEMISTRY; METALLURGY
    • C06EXPLOSIVES; MATCHES
    • C06BEXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B25/00Compositions containing a nitrated organic compound
    • C06B25/34Compositions containing a nitrated organic compound the compound being a nitrated acyclic, alicyclic or heterocyclic amine
    • CCHEMISTRY; METALLURGY
    • C06EXPLOSIVES; MATCHES
    • C06BEXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B33/00Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
    • C06B33/08Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide with a nitrated organic compound

Description

United States Patent ()fifice 3,297,503 Patented Jan. 10, 1967 CYCLOTOL AND THERMITE EXPLOSIVE COMPOSITION :Paul. .O! Hofimann, Maplewood, and Irving .L. iKintish,

The invention described herein may be manufactured and :used by or for the Government for governmental Ont Thisqtinvention relatesto explosives and more particularly concerns cyclotol type explosives modified by thermites.

The well-known thermite process is based on the reaction of. various metallic oxides with a specified metal resultingin the oxidation of the metal to its oxide and the reduction of the metallic oxide to the free metal, the reaction being extremely exothermic and oxygen selfsustaining.

The standard thermite reaction is:

and the; chemical constituents involved therein, as in all thermite reactions, are stoichiometrically balanced. Ex-

. amples. ofgother thermite reactions are:

Wexhave discovered that when certain thermites are incorporated in an explosive such as cyclotol, for example, which contains 60 parts of cyclotrimethylenetrinitramine, hereinafter referred to as RDX, and 40 parts of TNT, and about 1 part of a suitable hinder, the resultant explosive is characterized by good positive afterburning and extended fireballing. Afterburning is a desirable feature in:many ordnance explosives, as is Well known, since it maintains the pressure peak and duration of impulse of the explosion for several milliseconds after the primary explosion. Fireballing is a phenomenon wherein the explosiverains down molten metal particles, and when exploded at lower altitudes, will comprise a highly potentialthazard to; the enemy in jungle and guerilla warfare, in initiating conflagration-s, in secondary ground casualties, and thetlike.

It is therefore the principal object of this invention to provide. an explosive having the aforementioned advantages.

Other and further objects of the invention will be apparent to. those skilled in the art upon study of this disclosure;

In each of the examples following, the particular thermite was madein accordance with the procedure outlined belowv 100 grams of the thermite in stoichiometric proportions are thoroughly mixed in a suitable crucible of smooth, refractory material such as porcelain, alundum, TiO ZrO mullite, and the like and placed in an electric bench furnace and heated at a rate of about 10 i to 15 C./min. until the melting point of the metal involved is attained, the temperature being held thereat for about 5 to, minutes. The metal particle size will preferably range between 5 to microns and the oxide particle size will have a range of about 0.1 to 1 micron. The furnace is then allowed to cool gradually to room temperature and the crucibleremoved from the furnace.

purposeswithout the payment to us of any royalty there- 7 The agglomerated thermite may now 'be removed from the crucible and carefully granulated, as by ball milling, for example, such that of the thermite will pass through a 325 mesh screen (44 microns).

The thermite will constitute about 5 to 25 weight percent of the explosive but preferably will range between about 8 to 10%. If higher percentages of thermite are employed, the resultant explosive will yield lowerblast with greater fireballing effects. Conversely, when lower percentages of thermite are incorporated into the cyclotol type composition, higher blast and afterburning will be achieved at the expense of less fireballing.

EXAMPLE I Grams RDX 60 TNT 40 Fe 0 5.98 Al 2.02

EXAMPLE II Grams RDX 60 TNT 40 B 0 7.99 Zr 2.01

EXAMPLE III Grams RDX 60 TNT 40 Li 2.26

EXAMPLE 1V Grams RDX 60 TNT 40 EXAMPLE V Grams RDX 6O TNT 40 M11304 EXAMPLE VI Grams RDX 60 TNT 40 Al 5.37 V 0 4.63

In Examples II through VI, the procedure is identical with that described under Example I.

The following table indicates blast superiority and afterburning elfects of our compositions over cyclotol when tested using standard calorimetric procedures, the cyclotol being assigned the numerical value of 100.

3 Table I.-Blast efiectiveness Numerical Composition: value Cyclotol 100 Example I 105 Example II 106 Example III 108 Example IV 106 Example V 110 Example VI 115 In the practice of our inventive composition, the cyclotol may be ignited by a standard tetryl booster and detonator, a #8 blasting cap, etc. When sufficient heat is produced therefrom, the oxygen self-sustaining thermite composition is ignited. Our composition will provide for increased blast and fireballing, and, as above mentioned, increasing the amount of thermite results in increased fireballing eifects. Further, our inventive compositions do not deleteriously affect the impact sensitivity, vacuum stability or detonation rate of the cyclotol.

It should be understood, of course, that the foregoing disclosure relates to only preferred embodiments of our compositions and other thermite and explosive compositions may be used without departing from the spirit and scope of the invention as set forth in the appended claims.

We claim: 1. A high blast, good afterburning and good fireballing explosive composition comprising cyclotol and thermite, said thermite being selected from the group consisting of Al+Fe O Zr+B O Li+MoO Li+WO Al+Mn O and 2. The composition of claim 1 further characterized by said explosive composition comprising about 60 parts RDX, parts TNT and about 5 to 25 parts of one of said thermites.

3. The composition of claim 2 further characterized by said thermite preferably comprising 8 to 10 parts by weight of said explosive composition.

References Cited by the Examiner UNITED STATES PATENTS 2,424,937 7/1947 Linzell 14937 2,640,770 6/1953 Magram et al 14937 2,955,535 10/1960 Show et al l4937 X 3,050,409 8/1962 Bayer 14937 X 3,110,638 11/1963 Murphy et a1 149-37 X 3,150,020 9/1964 Kilmer 14937 3,160,097 12/1964 Colburn et a1 14937 X CARL D. QUARFORTH, Primary Examiner.

L. DEWAYNE RUTLEDGE, Examiner.

S. I. LECHERT, JR., Assistant Examiner.

Claims (1)

1. A HIGH BLAST, GOOD AFTERBURNING AND GOOD FIREBALLING EXPLOSIVE COMPOSITION COMPRISING CYCLOTOL AND THERMITE, SAID THERMITE BEING SELECTED FROM THE GROUP CONSISTING OF AL+FE2O3, ZR+B2O3, LI+MOO3, LI+WO3, AL+MN3O4, AND AL+V2O5.
US489084A 1965-09-21 1965-09-21 Cyclotol and thermite explosive composition Expired - Lifetime US3297503A (en)

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466205A (en) * 1965-03-01 1969-09-09 Armees France Explosive containing hexogene or octogene and a nitrated n-methylaniline
US3498857A (en) * 1966-12-06 1970-03-03 Ethyl Corp Aluminum iron oxide incendiary composition containing a (cyclopentadienyl) iron compound
US3618520A (en) * 1969-02-04 1971-11-09 Asahi Chemical Ind Method of cracking concrete
US3664898A (en) * 1969-08-04 1972-05-23 Us Navy Pyrotechnic composition
US3703144A (en) * 1969-09-16 1972-11-21 Space Ordnance Systems Inc Delay composition and device
US3738278A (en) * 1971-06-07 1973-06-12 W Bachusky Coloured smoke production
US3742120A (en) * 1970-10-28 1973-06-26 Us Navy Single layer self-destruct circuit produced by co-deposition of tungstic oxide and aluminum
US4000022A (en) * 1974-10-17 1976-12-28 The United States Of America As Represented By The Secretary Of The Navy Fast-burning compositions of fluorinated polymers and metal powders
US4076563A (en) * 1975-11-19 1978-02-28 General Electric Company Explosive composition for high temperature applications
US4318344A (en) * 1979-12-03 1982-03-09 The United States Of America As Represented By The Secretary Of The Navy Spinning tubular projectile combustible sabot
US4331080A (en) * 1980-06-09 1982-05-25 General Electric Co. Composite high explosives for high energy blast applications
US4478151A (en) * 1983-02-28 1984-10-23 The United States Of America As Represented By The Secretary Of The Navy Pressure vessel penetrator
US4488916A (en) * 1982-09-22 1984-12-18 Messerschmitt-Bolkow-Blohm Gmbh Cast explosive charge composition
WO1994008919A1 (en) * 1992-10-19 1994-04-28 Explosive Developments Limited Improvements in or relating to explosives
US5719352A (en) * 1993-04-22 1998-02-17 The Kent Cartridge Manufacturing Co. Limited Low toxicity shot pellets
US6001508A (en) * 1993-06-14 1999-12-14 Rayovac Corporation AgO cathode battery
US6066213A (en) * 1998-09-18 2000-05-23 Atlantic Research Corporation Minimum smoke propellant composition
US6126763A (en) * 1998-12-01 2000-10-03 Atlantic Research Corporation Minimum smoke propellant composition
US20030051786A1 (en) * 2000-10-26 2003-03-20 Verity Dennis Gordon Metal and metal oxide granules and forming process
US20060207460A1 (en) * 2005-03-21 2006-09-21 Reed Roger B Venting system and initiator thereof
US8591676B2 (en) * 2007-04-18 2013-11-26 University Of Central Florida Research Foundation, Inc. Thermite compositions from low temperature impact milling
CN106588524A (en) * 2016-12-19 2017-04-26 中国工程物理研究院化工材料研究所 High-energy-density explosive mixture and preparation method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424937A (en) * 1943-02-22 1947-07-29 United States Gypsum Co Incendiary composition
US2640770A (en) * 1951-05-29 1953-06-02 Sidney J Magram Igniting composition and method of preparing same
US2955535A (en) * 1958-05-28 1960-10-11 Olin Mathieson Ignition assembly for perforated cylindrical charge
US3050409A (en) * 1959-11-30 1962-08-21 Owens Illinois Glass Co Manufacture of refractory oxide coatings
US3110638A (en) * 1958-07-09 1963-11-12 Maurice F Murphy Controlled sensitivity igniter composition and method of producing same
US3150020A (en) * 1963-10-29 1964-09-22 Earl E Kilmer Gasless igniter composition
US3160097A (en) * 1961-07-17 1964-12-08 Gen Precision Inc Molybdenum trioxide-aluminum explosive and exploding bridgewire detonator therefor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424937A (en) * 1943-02-22 1947-07-29 United States Gypsum Co Incendiary composition
US2640770A (en) * 1951-05-29 1953-06-02 Sidney J Magram Igniting composition and method of preparing same
US2955535A (en) * 1958-05-28 1960-10-11 Olin Mathieson Ignition assembly for perforated cylindrical charge
US3110638A (en) * 1958-07-09 1963-11-12 Maurice F Murphy Controlled sensitivity igniter composition and method of producing same
US3050409A (en) * 1959-11-30 1962-08-21 Owens Illinois Glass Co Manufacture of refractory oxide coatings
US3160097A (en) * 1961-07-17 1964-12-08 Gen Precision Inc Molybdenum trioxide-aluminum explosive and exploding bridgewire detonator therefor
US3150020A (en) * 1963-10-29 1964-09-22 Earl E Kilmer Gasless igniter composition

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466205A (en) * 1965-03-01 1969-09-09 Armees France Explosive containing hexogene or octogene and a nitrated n-methylaniline
US3498857A (en) * 1966-12-06 1970-03-03 Ethyl Corp Aluminum iron oxide incendiary composition containing a (cyclopentadienyl) iron compound
US3618520A (en) * 1969-02-04 1971-11-09 Asahi Chemical Ind Method of cracking concrete
US3664898A (en) * 1969-08-04 1972-05-23 Us Navy Pyrotechnic composition
US3703144A (en) * 1969-09-16 1972-11-21 Space Ordnance Systems Inc Delay composition and device
US3742120A (en) * 1970-10-28 1973-06-26 Us Navy Single layer self-destruct circuit produced by co-deposition of tungstic oxide and aluminum
US3738278A (en) * 1971-06-07 1973-06-12 W Bachusky Coloured smoke production
US4000022A (en) * 1974-10-17 1976-12-28 The United States Of America As Represented By The Secretary Of The Navy Fast-burning compositions of fluorinated polymers and metal powders
US4076563A (en) * 1975-11-19 1978-02-28 General Electric Company Explosive composition for high temperature applications
US4318344A (en) * 1979-12-03 1982-03-09 The United States Of America As Represented By The Secretary Of The Navy Spinning tubular projectile combustible sabot
US4331080A (en) * 1980-06-09 1982-05-25 General Electric Co. Composite high explosives for high energy blast applications
US4488916A (en) * 1982-09-22 1984-12-18 Messerschmitt-Bolkow-Blohm Gmbh Cast explosive charge composition
US4478151A (en) * 1983-02-28 1984-10-23 The United States Of America As Represented By The Secretary Of The Navy Pressure vessel penetrator
WO1994008919A1 (en) * 1992-10-19 1994-04-28 Explosive Developments Limited Improvements in or relating to explosives
US5719352A (en) * 1993-04-22 1998-02-17 The Kent Cartridge Manufacturing Co. Limited Low toxicity shot pellets
US6001508A (en) * 1993-06-14 1999-12-14 Rayovac Corporation AgO cathode battery
US6066213A (en) * 1998-09-18 2000-05-23 Atlantic Research Corporation Minimum smoke propellant composition
US6126763A (en) * 1998-12-01 2000-10-03 Atlantic Research Corporation Minimum smoke propellant composition
US20030051786A1 (en) * 2000-10-26 2003-03-20 Verity Dennis Gordon Metal and metal oxide granules and forming process
US7985310B2 (en) 2000-10-26 2011-07-26 Denis Gordon Verity Metal and metal oxide granules, forming process and granule containing explosives
US7806999B2 (en) * 2000-10-26 2010-10-05 Dennis Gordon Verity Metal and metal oxide granules and forming process
US20100218861A1 (en) * 2000-10-26 2010-09-02 Denis Gordon Verity Metal and metal oxide granules, forming process and granule containing explosives
US7363847B2 (en) * 2005-03-21 2008-04-29 Lockheed Martin Corporation Venting system and initiator thereof
US20060207460A1 (en) * 2005-03-21 2006-09-21 Reed Roger B Venting system and initiator thereof
US8591676B2 (en) * 2007-04-18 2013-11-26 University Of Central Florida Research Foundation, Inc. Thermite compositions from low temperature impact milling
CN106588524A (en) * 2016-12-19 2017-04-26 中国工程物理研究院化工材料研究所 High-energy-density explosive mixture and preparation method thereof
CN106588524B (en) * 2016-12-19 2018-08-14 中国工程物理研究院化工材料研究所 A kind of high-energy density composite explosives and preparation method thereof

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