EP0002968A1 - 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
EP0002968A1
EP0002968A1 EP78400186A EP78400186A EP0002968A1 EP 0002968 A1 EP0002968 A1 EP 0002968A1 EP 78400186 A EP78400186 A EP 78400186A EP 78400186 A EP78400186 A EP 78400186A EP 0002968 A1 EP0002968 A1 EP 0002968A1
Authority
EP
European Patent Office
Prior art keywords
binder
weight
powder
nitrocellulose
fragmentable
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.)
Granted
Application number
EP78400186A
Other languages
English (en)
French (fr)
Other versions
EP0002968B1 (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
Application granted granted Critical
Publication of EP0002968B1 publication Critical patent/EP0002968B1/de
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C06EXPLOSIVES; MATCHES
    • C06BEXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B25/00Compositions containing a nitrated organic compound
    • C06B25/18Compositions containing a nitrated organic compound the compound being nitrocellulose present as 10% or more by weight of the total composition
    • C06B25/20Compositions 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
    • CCHEMISTRY; METALLURGY
    • C06EXPLOSIVES; MATCHES
    • C06BEXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B25/00Compositions containing a nitrated organic compound
    • C06B25/18Compositions containing a nitrated organic compound the compound being nitrocellulose present as 10% or more by weight of the total composition
    • CCHEMISTRY; METALLURGY
    • C06EXPLOSIVES; MATCHES
    • C06BEXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B45/00Compositions or products which are defined by structure or arrangement of component of product
    • C06B45/04Compositions 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
    • C06B45/06Compositions 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
    • C06B45/10Compositions 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
    • C06B45/105The 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.
  • the pot life at 20 ° C. of the crosslinkable binders after addition of the catalysts is low, which limits their industrial interest.
  • 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 modification of the composition at certain points of the block, therefore a disturbance of the ballistic performance of this block, but also the tiny droplets of nitroglycerin exuded at the periphery of this block risk detonating 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.
  • 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 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 propellant powder and the energy binder used are the same as those of Example 1, but the rate of the binder is brought to 10%.
  • 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, a height of 72 mm, 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 lower than 900 cal / g is not sufficiently lively.
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
FR7737901A FR2411817A1 (fr) 1977-12-15 1977-12-15 Chargement unitaire fragmentable de poudre propulsive, contenant un liant au nitrate de polyvinyle
FR7737901 1977-12-15

Publications (2)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326901A (en) * 1978-09-21 1982-04-27 Societe Nationale Des Poudres Et Explosifs Fragmentable charges of propelland powder coated with polyvinyl nitrate, and the process for their manufacture
US4347087A (en) * 1978-12-22 1982-08-31 Societe Nationale Des Poudres Et Explosifs Granular propellant powder based on nitrocellulose, oily nitrate ester and polyvinyl nitrate, and process
EP0633236A1 (de) * 1993-06-30 1995-01-11 Alliant Techsystems Inc. Energetische Beschuhtung für Treibstoffe für Feuerwaffen
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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5489349A (en) * 1995-04-06 1996-02-06 Trw Inc. Grains of gas generating material and process for forming the grains

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1040557A (fr) * 1949-04-20 1953-10-16 Ministre De La Defense Nationa Composition adhésive calorifuge, isolante et plastique
US2990263A (en) * 1949-02-03 1961-06-27 William H Avery Process for manufacturing rocket propellants
FR2114142A5 (de) * 1970-11-17 1972-06-30 Remington Arms Co Inc
FR2182662A2 (en) * 1972-05-03 1973-12-14 France Etat Propellant powder - contg ammonium nitrate, nitrocellulose and polyvinyl nitrate
FR2182663A2 (de) * 1972-05-03 1973-12-14 France Etat
FR2210589A1 (de) * 1972-12-14 1974-07-12 Poudres & Explosifs Ste Nale
DE2329558A1 (de) * 1973-06-09 1975-01-23 Messerschmitt Boelkow Blohm Giessfaehige gasgeneratortreibstoffe
CA968629A (en) * 1970-07-18 1975-06-03 Heinz Gawlick Caseless formed propellant powder charge

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1811924C3 (de) * 1968-11-30 1973-07-05 Wasagchemie Ag Treibladungskoerper fuer huelsenlose Munition
US4023996A (en) * 1973-08-09 1977-05-17 Societe Nationale Des Poudres Et Explosifs Moldable compositions comprising polyvinyl nitrate

Patent Citations (8)

* 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
CA968629A (en) * 1970-07-18 1975-06-03 Heinz Gawlick Caseless formed propellant powder charge
FR2114142A5 (de) * 1970-11-17 1972-06-30 Remington Arms Co Inc
FR2182662A2 (en) * 1972-05-03 1973-12-14 France Etat Propellant powder - contg ammonium nitrate, nitrocellulose and polyvinyl nitrate
FR2182663A2 (de) * 1972-05-03 1973-12-14 France Etat
FR2210589A1 (de) * 1972-12-14 1974-07-12 Poudres & Explosifs Ste Nale
DE2329558A1 (de) * 1973-06-09 1975-01-23 Messerschmitt Boelkow Blohm Giessfaehige gasgeneratortreibstoffe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326901A (en) * 1978-09-21 1982-04-27 Societe Nationale Des Poudres Et Explosifs Fragmentable charges of propelland powder coated with polyvinyl nitrate, and the process for their manufacture
US4347087A (en) * 1978-12-22 1982-08-31 Societe Nationale Des Poudres Et Explosifs Granular propellant powder based on nitrocellulose, oily nitrate ester and polyvinyl nitrate, and process
EP0633236A1 (de) * 1993-06-30 1995-01-11 Alliant Techsystems Inc. Energetische Beschuhtung für Treibstoffe für Feuerwaffen
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

Also Published As

Publication number Publication date
AU524341B2 (en) 1982-09-09
AU4252978A (en) 1979-06-21
CA1127396A (en) 1982-07-13
IL56004A (en) 1982-07-30
US4279672A (en) 1981-07-21
DE2860335D1 (en) 1981-03-12
EP0002968B1 (de) 1981-01-14
FR2411817A1 (fr) 1979-07-13
FR2411817B1 (de) 1980-08-22

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