EP0002968B1 - Zersplitterfähige Einheitsladung eines Treibmittels mit einem Polyvinylnitrat enthaltenden Bindemittel und Verfahren zu dessen Herstellung - Google Patents

Zersplitterfähige Einheitsladung eines Treibmittels mit einem Polyvinylnitrat enthaltenden Bindemittel und Verfahren zu dessen Herstellung Download PDF

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Publication number
EP0002968B1
EP0002968B1 EP78400186A EP78400186A EP0002968B1 EP 0002968 B1 EP0002968 B1 EP 0002968B1 EP 78400186 A EP78400186 A EP 78400186A EP 78400186 A EP78400186 A EP 78400186A EP 0002968 B1 EP0002968 B1 EP 0002968B1
Authority
EP
European Patent Office
Prior art keywords
weight
powder
nitrocellulose
fragmentable
unitary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP78400186A
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English (en)
French (fr)
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EP0002968A1 (de
Inventor
Louis Leneveu
Didier Treneules
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe Nationale des Poudres et Explosifs
Original Assignee
Societe Nationale des Poudres et Explosifs
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe Nationale des Poudres et Explosifs filed Critical Societe Nationale des Poudres et Explosifs
Publication of EP0002968A1 publication Critical patent/EP0002968A1/de
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Publication of EP0002968B1 publication Critical patent/EP0002968B1/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B25/00—Compositions containing a nitrated organic compound
    • C06B25/18—Compositions containing a nitrated organic compound the compound being nitrocellulose present as 10% or more by weight of the total composition
    • C06B25/20—Compositions containing a nitrated organic compound the compound being nitrocellulose present as 10% or more by weight of the total composition with a non-explosive or a non-explosive or a non-thermic component
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B25/00—Compositions containing a nitrated organic compound
    • C06B25/18—Compositions containing a nitrated organic compound the compound being nitrocellulose present as 10% or more by weight of the total composition
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
    • C06B45/04—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive
    • C06B45/06—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive the solid solution or matrix containing an organic component
    • C06B45/10—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive the solid solution or matrix containing an organic component the organic component containing a resin
    • C06B45/105—The resin being a polymer bearing energetic groups or containing a soluble organic explosive

Definitions

  • the subject of the present invention is a fragmentable unit charge of propellant powder consisting of grains of nitrocellulose powder, agglomerated together by a solid, thermoplastic energy binder, said unit charge having the ballistic properties of a granular charge.
  • Granular charges of nitrocellulose powder are commonly used in ammunition for small and medium caliber weapons.
  • nitroglycerin has a strong tendency to exude from the block, that is to say to migrate from the interior of the block towards the periphery thereof. This exudation not only causes a change in the composition at certain points of the block, but also the tiny droplets of nitroglycerin exuded at the periphery of this block may detonate at the slightest shock.
  • powders containing nitroglycerin are too strong and too bright and they are too erosive and do not lend themselves to the production of fragmentable charges.
  • the amount of energy binder incorporated must be low and between 3 to 15% by weight relative to the load, and preferably between 5 to 10% by weight.
  • the binder may also contain at least one additive chosen from the group comprising polymers of the ABS (acrylonitrile-butadiene-styrene) type, dinitrotoluene, cellulose acetate, phthalates, heavy esters, heterocyclic ketones (camphor) or ureas (centralite).
  • ABS acrylonitrile-butadiene-styrene
  • dinitrotoluene cellulose acetate
  • phthalates heavy esters
  • heterocyclic ketones camphor
  • ureas centralite
  • the propellant powder is a single base grain nitrocellulose powder obtained by the solvent process, called powder "B".
  • this powder B is a monotubular powder having a potential of 870 to 950 cal / g.
  • Powders with a potential greater than 950 cal / g are too strong (too strong pressure build-up), and the maximum pressures measured in the cylinder head are too strong for conventional weapons.
  • Powders having a potential of less than 870 cal / g are not strong enough (pressure build-up too slow), the maximum pressures measured in the cylinder head are too low.
  • Multitubular grain powders are difficult to compression mold in a homogeneous manner because the grains are too large, and are of no interest given the mode of disintegration of the block.
  • compositions can be used in particular:
  • the mold used is a conventional compression mold comprising a mold body provided with a cylindrical axial bore forming the molding cavity, and two movable cylindrical punches, engaged respectively in the upper part and in the lower part of the molding cavity and respectively forming the matrix and the mold ejector.
  • the ejector carries an axial core extended through the molding cavity and engaged in an axial bore provided in the die: The movement of the punches is controlled by jacks.
  • the heating or cooling of the mold is ensured by a circulation circuit of heating or cooling fluid.
  • the mold is prepared by coating the inside of the mold, the punches and the core with a release agent.
  • Molding The mold is heated beforehand to 120 ° C. and the powder-binder mixture produced above is loaded into the molding cavity.
  • the said mixture is allowed to warm to 120 ° C. and then it is compressed to this temperature under a force of 800 kg, which corresponds to a pressure on the block of approximately 115 bars for one minute, then the load obtained is demolded hot.
  • a hollow cylindrical block with a weight of 70 g, a height of 72.5 mm and a diameter of 30 mm is thus obtained.
  • the fragmentation of the block is correct. On the same series of 20 strokes there is a satisfactory standard deviation of 20 m / s for speed and 200 bar for pressure. The mechanical strength is good.
  • the fragmentation of the block is correct and the mechanical strength of the block is good.
  • This example is intended to show the influence of the rate of binder on the ballistic characteristics of the final unit load; with a rate of binder higher than 15% the load breaks up badly and burns like a compact block.
  • the propellant powder and the energy binder used in this example are the same as those of Example 1 but the binder rate is increased to 20%.
  • Example 2 The procedure is as in Example 1, but starting from a mixture of 56 g of BTu 93 powder (0.5) smoothed with 1% centralite and 14 g of binder of composition No. 1.
  • a hollow cylindrical block with a weight of 70 g, of a height of 72 mm, with a diameter of 30 mm is obtained.
  • This example is intended to show the influence of the potential of the propellant powder on the characteristics of the final block.
  • a powder with a potential of less than 900 cal / g is not sufficiently lively.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Molecular Biology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Powder Metallurgy (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Claims (7)

1. Zersplitterbare einheitliche Ladung mit Gehalt an Polyvinylnitrat und auf Basis der Nitrozellulose als Sprengpulver, dadurch gekennzeichnet, daß sie aus 85 bis 97 Gewichtsprozent Nitrozellulose-Sprengstoffkörnern gebildet ist, die miteinander durch 15 bis 3% und vorzugsweise 10 bis 5 Gewichtsprozent eines festen, thermoplastischen energetischen Bindemittel mit der folgenden Zusammensetzung agglomeriert sind:
(a) 30 bis 60 Gewichtsprozent, im Verhältnis zum Bindemittel, Polyvinylnitrat,
(b) 70 bis 40 Gewichtsprozent, im Verhältnis zum Bindemittel, Nitrozellulose mit einem geringen Stickstoffgehalt unter 12,8% oder Polyvinylacetat oder eines Gemisches der beiden,
(c) gegebenenfalls ein Stabilisator.
2. Zersplitterbare einheitliche Ladung nach Anspruch 1, dadurch gekennzeichnet, daß Stabilisator das Nitro-2 diphenylamin ist, das in einer 3 Gewichtsprozent, im Verhältnis zum energetischen Bindemittel, erreichen könnenden Menge zugesetzt ist.
3. Zersplitterbare einheitliche Ladung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das energetische Bindemittel gleichfalls wenigstens einen Zusatz enthält, der in der Dinitrotoluol, ein Polymeres des ABS (Acrylnitril-Butadien-Styrol)-Typs, Zelluloseacetat, Phthalate, schwere Ester, heterozyklische Ketone und Harnstoffe umfassenden Gruppe gewählt ist.
4. Zersplitterbare einheitliche Ladung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Sprengpulver ein Nitrozellulosepulver aus Körnern auf einfacher Basis, sog. "B-Pulver", ist.
5. Zersplitterbare einheitliche Ladun nach Anspruch 4, dadurch gekennzeichnet, daß das B-Pulver ein einrohrförmiges Pulver mit einem Potential von 870 bis 950 cal/g ist.
6. Zersplitterbare einheitliche Ladung nach Anspruch 1, dadurch gekennzeichnet, daß das energetische Bindemittel die folgende Zusammensetzung aufweist:
-40 bis 60 Gewichtsteile Polyvinylnitrat, dessen Stickstoffgehalt unter oder gleich 15,4% ist,
-60 bis 40 Gewichtsteile Nitrozellulose mit einem Stickstoffgehalt von 11 % bis 12.6%,
-2 bis 3 Gewichsteile Nitro-2 diphenylamin.
7. Verfahren zur Herstellung einer zersplitterbaren einheitlichen Ladung mit Gehalt an Polyvinylnitrat und auf Basis der Nitrozellulose als Sprengpulver, dadurch gekennzeichnet, daß es die folgenden Schritte aufweist:
-Mischung der Nitrozellulosepulverkörner im Anteil von 85 bis 97 Gewichtsprozent mit einem festen, thermoplastischen energetischen Bindemittel im Anteil von 15 bis 3 Gewichtsprozent, wobei das Bindemittel die folgende Zusammensetzung hat:
(a) 30 bis 60 Gewichtsprozent, im Verhältnis zum Bindemittel, Polyvinylnitrat,
(b) 70 bis 40 Gewichtsprozent, im Verhältnis zum Bindemittel, Nitrozellulose mit einem geringen Stickstoffgehalt unter 12,8% oder Polyvinylacetat oder eines Gemisches der beiden,
(c) gegebenenfalls ein Stabilisator;
-Einfüllen des erhaltenen Gemisches in eine Druckform;
-Temperatureinstellung der das Gemisch enthaltenden Form auf eine Temperatur, bei der das Bindemittel plastisch wird, vorzugsweise auf eine Temperatur von 105 bis 130°C;
-Kompression des Gemisches bei dieser Temperatur bei einem Druck von 100 bis 150 bar während einer kurzen Dauer, vorzugsweise während etwa einer Minute;
-Entformung der erhaltenen einheitlichen Ladung unmittelbar nach der Kompression.
EP78400186A 1977-12-15 1978-11-17 Zersplitterfähige Einheitsladung eines Treibmittels mit einem Polyvinylnitrat enthaltenden Bindemittel und Verfahren zu dessen Herstellung Expired EP0002968B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7737901 1977-12-15
FR7737901A FR2411817A1 (fr) 1977-12-15 1977-12-15 Chargement unitaire fragmentable de poudre propulsive, contenant un liant au nitrate de polyvinyle

Publications (2)

Publication Number Publication Date
EP0002968A1 EP0002968A1 (de) 1979-07-11
EP0002968B1 true EP0002968B1 (de) 1981-01-14

Family

ID=9198905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78400186A Expired EP0002968B1 (de) 1977-12-15 1978-11-17 Zersplitterfähige Einheitsladung eines Treibmittels mit einem Polyvinylnitrat enthaltenden Bindemittel und Verfahren zu dessen Herstellung

Country Status (7)

Country Link
US (1) US4279672A (de)
EP (1) EP0002968B1 (de)
AU (1) AU524341B2 (de)
CA (1) CA1127396A (de)
DE (1) DE2860335D1 (de)
FR (1) FR2411817A1 (de)
IL (1) IL56004A (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2436766A1 (fr) * 1978-09-21 1980-04-18 Poudres & Explosifs Ste Nale Chargements fragmentables de poudre propulsive enrobee de nitrate de polyvinyle et leur procede de fabrication
FR2444651A1 (fr) * 1978-12-22 1980-07-18 Poudres & Explosifs Ste Nale Nouvelles poudres propulsives en grains a base de nitrocellulose, d'huile nitree et de nitrate de polyvinyle et leur procede de fabrication
FR2518736B1 (fr) * 1981-12-17 1986-09-26 Poudres & Explosifs Ste Nale Chargements mixtes pour munitions avec douille constitues de poudre propulsive agglomeree et de poudre propulsive en grains
US4839420A (en) * 1984-04-16 1989-06-13 The United States Of America As Represented By The Secretary Of The Army Preparation of polyvinylazides from polyvinylnitrate
US4843121A (en) * 1984-04-16 1989-06-27 The United States Of America As Represented By The Secretary Of The Army Polyvinylazidonitrate
US5174837A (en) * 1990-02-21 1992-12-29 Societe Nationale Des Poudres Et Explosifs Temperature-resistant, fragmentable propellent charges
US5269224A (en) * 1990-08-30 1993-12-14 Olin Corporation Caseless utilized ammunition charge module
EP0633236A1 (de) * 1993-06-30 1995-01-11 Alliant Techsystems Inc. Energetische Beschuhtung für Treibstoffe für Feuerwaffen
US5489349A (en) * 1995-04-06 1996-02-06 Trw Inc. Grains of gas generating material and process for forming the grains
US6837164B1 (en) * 2002-11-13 2005-01-04 The United States Of America As Represented By The Secretary Of The Army Propelling charge increment protector for 120mm mortar ammunition
RU2229467C1 (ru) * 2003-08-25 2004-05-27 Инновационный фонд "Развития и взаимосвязи культур, наук, образований, религий, обществ, стран" Стабилизатор химической стойкости нитроцеллюлозных порохов и твердых ракетных топлив и способ их обработки
RU2229464C1 (ru) * 2003-08-25 2004-05-27 Инновационный фонд "Развития и взаимосвязи культур, наук, образований, религий, обществ, стран" Стабилизатор химической стойкости нитроцеллюлозных порохов и твердых ракетных топлив и способ их обработки
RU2229465C1 (ru) * 2003-08-25 2004-05-27 Инновационный фонд "Развития и взаимосвязи культур, наук, образований, религий, обществ, стран" Стабилизатор химической стойкости нитроцеллюлозных порохов и твердых ракетных топлив и способ их обработки
RU2229466C1 (ru) * 2003-08-25 2004-05-27 Инновационный фонд "Развития и взаимосвязи культур, наук, образований, религий, обществ, стран" Способ стабилизации химической стойкости нитроцеллюлозных порохов для ствольных и ракетных систем

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2990263A (en) * 1949-02-03 1961-06-27 William H Avery Process for manufacturing rocket propellants
FR1040557A (fr) * 1949-04-20 1953-10-16 Ministre De La Defense Nationa Composition adhésive calorifuge, isolante et plastique
DE1811924C3 (de) * 1968-11-30 1973-07-05 Wasagchemie Ag Treibladungskoerper fuer huelsenlose Munition
DE2035851C3 (de) * 1970-07-18 1979-03-15 Dynamit Nobel Ag, 5210 Troisdorf Treibladungs-Pulverkörper und Verfahren zu seiner Herstellung
FR2114142A5 (de) * 1970-11-17 1972-06-30 Remington Arms Co Inc
FR2182663B2 (de) * 1972-05-03 1974-12-20 France Etat
FR2182662A2 (en) * 1972-05-03 1973-12-14 France Etat Propellant powder - contg ammonium nitrate, nitrocellulose and polyvinyl nitrate
FR2210589B1 (de) * 1972-12-14 1976-08-20 Poudres & Explosifs Ste Nale
DE2329558C3 (de) * 1973-06-09 1978-10-05 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V., 8000 Muenchen Gießfähige Gasgeneratortreibstoffe
US4023996A (en) * 1973-08-09 1977-05-17 Societe Nationale Des Poudres Et Explosifs Moldable compositions comprising polyvinyl nitrate

Also Published As

Publication number Publication date
AU524341B2 (en) 1982-09-09
EP0002968A1 (de) 1979-07-11
FR2411817B1 (de) 1980-08-22
DE2860335D1 (en) 1981-03-12
AU4252978A (en) 1979-06-21
US4279672A (en) 1981-07-21
FR2411817A1 (fr) 1979-07-13
IL56004A (en) 1982-07-30
CA1127396A (en) 1982-07-13

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