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 PDFInfo
- 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
Links
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.
- 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.
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)
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)
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)
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)
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 |
-
1977
- 1977-12-15 FR FR7737901A patent/FR2411817A1/fr active Granted
-
1978
- 1978-11-17 DE DE7878400186T patent/DE2860335D1/de not_active Expired
- 1978-11-17 EP EP78400186A patent/EP0002968B1/de not_active Expired
- 1978-11-20 IL IL56004A patent/IL56004A/xx unknown
- 1978-11-29 US US05/964,482 patent/US4279672A/en not_active Expired - Lifetime
- 1978-12-14 CA CA317,931A patent/CA1127396A/en not_active Expired
- 1978-12-14 AU AU42529/78A patent/AU524341B2/en not_active Expired
Patent Citations (8)
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)
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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