IL32928A - Cartridge-less moulded propellant charge - Google Patents

Cartridge-less moulded propellant charge

Info

Publication number
IL32928A
IL32928A IL32928A IL3292869A IL32928A IL 32928 A IL32928 A IL 32928A IL 32928 A IL32928 A IL 32928A IL 3292869 A IL3292869 A IL 3292869A IL 32928 A IL32928 A IL 32928A
Authority
IL
Israel
Prior art keywords
cartridge
moulded
less
propellant charge
protective coating
Prior art date
Application number
IL32928A
Other versions
IL32928A0 (en
Original Assignee
Dynamit Nobel Ag
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 Dynamit Nobel Ag filed Critical Dynamit Nobel Ag
Publication of IL32928A0 publication Critical patent/IL32928A0/en
Publication of IL32928A publication Critical patent/IL32928A/en

Links

Classifications

    • 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
    • C06B45/18Compositions or products which are defined by structure or arrangement of component of product comprising a coated component
    • C06B45/20Compositions or products which are defined by structure or arrangement of component of product comprising a coated component the component base containing an organic explosive or an organic thermic component
    • C06B45/22Compositions or products which are defined by structure or arrangement of component of product comprising a coated component the component base containing an organic explosive or an organic thermic component the coating containing an organic compound
    • CCHEMISTRY; METALLURGY
    • C06EXPLOSIVES; MATCHES
    • C06BEXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • C06B21/0083Treatment of solid structures, e.g. for coating or impregnating with a modifier
    • 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
    • C06B45/18Compositions or products which are defined by structure or arrangement of component of product comprising a coated component
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02Cartridges, i.e. cases with charge and missile
    • F42B5/18Caseless ammunition; Cartridges having combustible cases
    • F42B5/192Cartridge cases characterised by the material of the casing wall
    • F42B5/196Coatings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Paints Or Removers (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

moulded propellant charge NOBEL 31074 The invention relates to a moulded propellant charge of an explosive which is or decomposes by deflagration without tending to such as olyvinyl erythritol tetranitrate or the or mixtures particularly for apparatus in commercial such as nail driving impact control quick break switches and the While such moulded propellant charges have great advantages owing to the absence of the conventional ridge they have the considerable disadvantage that the surface of the mouldings is unprotected and consequently so that the mouldings can catch fire or even be unintentionally owing to the high inflammability of the explosives of which they are Accordingly the storage and use of these mouldings require certain because of the absorptivity of the materials used and the substantially porous structure of the their unprotected surface tends to admit water or other liquids as well as such as in addition to the particularly careful handling of these moulded charges from the point of view of safety they must also be carefully manipulated in the course of their usually rough handling in practical It is the of the present invention to ate the above mentioned According to the invention this is achieved by providing the moulded charges with a firmly 5 preferably protective layer which protects the charges unintentional ignition or combustio and from nation and absorption of an advantageous embodiment of the invention this protective layer is created by denitration of the moulding by the of the nitro or nitrate groups in the of the nitro or nitrate groups in surface of the starting material can be carried in a simple by the treatment of the moulded charges in a bath containing suitable such as sulfides or and the followed by the removal of the split products by In addition to this surface or in its there may be according to another ment of the a protective of synthetic for polyglycidyl ethers and the or of soluble resins such as polyvinyl acetate and mixed polyacrylates or of dispersions of polyvinyl Yet another embodiment of Invention provides the use of such as methyl cellulose glycolate or the in forming the protective The protective layer may be formed by painting or precipitation from a depending on the nature of the starting material Suitable for cation by immersion or painting are polyurethane which may be used either as prepolymerisates with subsequent as finished as well tional aromatic glyeidyl mixed vinyl acetate polyacrylle dispersions of polyvinyl mixed polymerisates of or of for cellulose colatee are advantageously used for application by Where a this too ma be and possibly secured in its by the protective Since the porous structure of the moulded charge is not altered in the method according to invention and the protective coating may accordingly be made very of the mouldings is not while the danger in handling the mouldings is reduced to an able deeply penetrating contaminations are largely and lastly the resistance to mechanical stresses is improved and the wear by friction is All this without significant residue Pellets of 6 diamete and thickness were prepared in a die by means of a hydraulic press from a wet fibrous nitrocellulose having a nitrogen content of and being covered with of eentralite and o One surface of these pellets had a slanting upper depression of 2 mm depth and pellets had smooth surfaces and were sufficiently strong mechanicall not to in Their porous structure was still evident by the ct that of liquids were pellets dried before being further then of a moist detonato was into the depression and the pellets were from al moisture by fhe pellets were t passed through bath a mixture parts by weight of a of molecular weight 1200 parts of diisocyanate 3 parts of phtha and 70 parts of methylene On the surface there remained a liquid the solvent evaporated very coating fied by subsequent warming and formed a firmly thin layer which protected the body of the charge on sides and not impai the of the Ho formation of residue detonation resulted insufficientOCRQuality

Claims (6)

1. , A cartridge-leas moulded propellant charge of an explosive material such aa nitrocellulose, polyvinyl nitrate, nitroguanldine, pentaerythrltol tetranitrate and the like, o of mixtures thereof, particularly for use in commercial apparatus such as nail driving tools, impact tools, control elements, quick break switches and the like, which charge is provided on its surface with a firmly adhering, preferably thin layer protecting it from unintentional ignitio or combustion and from contamination and absorption of moisture,
2. A cartridge-less moulded propellant charge according to Claim 1, wherein the protective layer is created by the splitting-otf of the nitro or nitrate groups in the surface of the moulding*
3. · A cartridge-less moulded propellant charge according to Claim 1 or 2, wherein a protective coating is formed rom synthetic resins, e.g., polyurethanes, polyglyeidyl ethers and the like, or soluble resins such as polyvinyl acetate and mixed polymerisates, polyacrylates or dispersions based on polybutadiene, polyvinyl acetate and polyacrylates.
4. A cartridge-less moulded propellant charge according to Claim 1 or 2, wherein a protective layer is formed from methyl cellulose, cellulose glycolates or the like,
5. * A process for the manufacture of cartridge-less moulde propellent charges according to Claims 3 or 4» wherein the protective coating is applied by immersion, painting or precipitation from a solution.
6. A process for the manufacture of cartridge-less moulded propellant charges according to Claims 3 or 4» wherein the protective coating is formed by prior spraying, painting or similar treatment of the press-die with a lacquer component, or by the insertion of the lacquer component in the form of a foil into the die in the moulding operation. For the Applicants PARTNERS iffi/rb
IL32928A 1968-09-04 1969-09-02 Cartridge-less moulded propellant charge IL32928A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1796118A DE1796118C3 (en) 1968-09-04 1968-09-04 Caseless propellant charge compact and process for its manufacture

Publications (2)

Publication Number Publication Date
IL32928A0 IL32928A0 (en) 1970-12-24
IL32928A true IL32928A (en) 1973-07-30

Family

ID=5708368

Family Applications (1)

Application Number Title Priority Date Filing Date
IL32928A IL32928A (en) 1968-09-04 1969-09-02 Cartridge-less moulded propellant charge

Country Status (16)

Country Link
JP (1) JPS4942531B1 (en)
AT (1) AT290362B (en)
BE (1) BE738397A (en)
BR (1) BR6912030D0 (en)
CA (1) CA936697A (en)
CH (1) CH500053A (en)
DE (1) DE1796118C3 (en)
DK (1) DK135678C (en)
ES (1) ES370815A1 (en)
FR (1) FR2017366A1 (en)
GB (1) GB1277247A (en)
IL (1) IL32928A (en)
NL (1) NL6913424A (en)
NO (1) NO122518B (en)
PL (1) PL80202B1 (en)
YU (1) YU34107B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2709037A1 (en) * 1977-03-02 1978-09-07 Dynamit Nobel Ag FIRM-WEATHER-PROOF DRIVE KIT FOR BOLT DRIVE CARTRIDGES
DE2710451C2 (en) * 1977-03-10 1990-11-15 Rheinmetall GmbH, 4000 Düsseldorf Surface protection coating for ammunition with a combustible case or caseless ammunition
FR2444251A1 (en) * 1978-12-15 1980-07-11 Poudres & Explosifs Ste Nale COMBUSTIBLE OBJECTS, AND IN PARTICULAR COMBUSTIBLE SOCKETS, RESISTANT TO HEAT
DE3006475C2 (en) * 1980-02-21 1986-10-30 Société Anonyme PRB, Brüssel / Bruxelles Fuel for base-bleed gas generators, process for its production and for the production of a propellant from this fuel
FR2590360B1 (en) * 1985-11-19 1989-06-30 Poudres & Explosifs Ste Nale MIXED LOADS FOR AMMUNITION WITH SOCKET COMPRISING FRAGMENTABLE SPHERICAL LOADS
WO2001019759A1 (en) * 1999-09-15 2001-03-22 Dynamit Nobel Gmbh Explosivstoff- Und Systemtechnik Propellant charge powder having low temperature dependency

Also Published As

Publication number Publication date
BR6912030D0 (en) 1973-03-20
DE1796118A1 (en) 1972-02-17
CA936697A (en) 1973-11-13
DE1796118B2 (en) 1977-12-08
DK135678C (en) 1977-11-14
CH500053A (en) 1970-12-15
AT290362B (en) 1971-05-25
JPS4942531B1 (en) 1974-11-15
BE738397A (en) 1970-02-16
YU34107B (en) 1978-12-31
GB1277247A (en) 1972-06-07
NL6913424A (en) 1970-03-06
NO122518B (en) 1971-07-05
FR2017366A1 (en) 1970-05-22
YU203669A (en) 1978-06-30
ES370815A1 (en) 1971-07-01
PL80202B1 (en) 1975-08-30
DE1796118C3 (en) 1978-08-17
IL32928A0 (en) 1970-12-24
DK135678B (en) 1977-06-06

Similar Documents

Publication Publication Date Title
DE2946422A1 (en) LINEAR IGNITION
US5567912A (en) Insensitive energetic compositions, and related articles and systems and processes
US4452653A (en) Method of coating ammunition with a protective surface layer
CA2103792A1 (en) Explosives
US3927616A (en) Combustible cartridge case
IL32928A (en) Cartridge-less moulded propellant charge
US2643184A (en) Propellent charge for jet-propelled devices
US5547527A (en) Process for the production of desensitized explosives
CA1156839A (en) Fragmentable charges of propellant powder coated with polyvinyl nitrate, and the process for their manufacture
DE59908809D1 (en) Process for the production of one, two or three-base propellant powder for gun ammunition
US3092525A (en) Method of producing unitary nitrocellulose grains capable of fragmentation under primer blast to original granules
US3727512A (en) Process for the surface treatment of non metallic cases such as cartridges, and the so treated cases
DE1809360A1 (en) INSULATING COMPOUNDS FOR THE PRODUCTION OF AN INSULATING LAYER ON SOLIDS MISSILE DEPLOYMENT AND ITS USE FOR THE PRODUCTION OF THIS INSULATION LAYER
US2615800A (en) Coated granular explosive composition
US3993524A (en) Adhesive bonding method allowing nondestructive separation of bonded materials
US3152935A (en) Flare composition
FR2680169A1 (en) PROCESS FOR MAKING POROUS PROPELLANT AGENTS FOR AMMUNITION
US3723207A (en) Process for preparing stable essentially water-free slurries of nitrocellulose and products thereof
US3017300A (en) Pelleted igniter composition and method of manufacturing same
US2932251A (en) Ammonium nitrate explosive
CA2301392C (en) Desensitisation of energetic materials
US4300961A (en) Process for deterrent coating of triple base propellant compositions
US3037247A (en) Process for colloiding nitrocellulose
US3000717A (en) Asphalt base solid composite propellants
DE458112C (en) Ignition body for heavy duty engines