EP1211232A2 - Process for producing mouldable, plastic-bound explosives - Google Patents

Process for producing mouldable, plastic-bound explosives Download PDF

Info

Publication number
EP1211232A2
EP1211232A2 EP01124918A EP01124918A EP1211232A2 EP 1211232 A2 EP1211232 A2 EP 1211232A2 EP 01124918 A EP01124918 A EP 01124918A EP 01124918 A EP01124918 A EP 01124918A EP 1211232 A2 EP1211232 A2 EP 1211232A2
Authority
EP
European Patent Office
Prior art keywords
explosive
powder
explosive charge
plastic
metal powder
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
EP01124918A
Other languages
German (de)
French (fr)
Other versions
EP1211232A3 (en
EP1211232B1 (en
Inventor
Paul Dr. Wanninger
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.)
Rheinmetall Waffe Munition GmbH
Original Assignee
Rheinmetall W&M GmbH
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
Priority to DE10058705 priority Critical
Priority to DE2000158705 priority patent/DE10058705C1/en
Application filed by Rheinmetall W&M GmbH filed Critical Rheinmetall W&M GmbH
Publication of EP1211232A2 publication Critical patent/EP1211232A2/en
Publication of EP1211232A3 publication Critical patent/EP1211232A3/en
Application granted granted Critical
Publication of EP1211232B1 publication Critical patent/EP1211232B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • C06B21/0033Shaping the mixture
    • C06B21/0058Shaping the mixture by casting a curable composition, e.g. of the plastisol type

Abstract

The invention relates to a method for producing pourable, plastic-bound explosive charges, wherein a crystalline explosive is embedded in a polymer matrix composed of a binder, a plasticizer and other auxiliaries. In order to ensure that the explosive charge remains pourable despite a high (e.g. 90%) solids content and therefore has a sufficiently low viscosity without the grain fraction of the explosive crystals having to be screened beforehand, the invention proposes that the explosive charge 0.1 up to 10% by weight of very fine-grained vanadium, niobium, tantalum, chromium, molybdenum or tungsten powder or a mixture of two or more such powders, the powder grains of the respective metal powder being intended to have an essentially spherical shape. Surprisingly, it has been found that metal powders of this type act like liquid lubricants between the coarser granular explosive particles and reduce the viscosity of the corresponding explosive charge.

Description

The invention relates to a method for producing castable plastic-bound Explosive charges according to the preamble of claim 1.

Plastic-bound explosive charges have a high active power relatively high insensitivity. They consist of reaction polymers in the front curing crystalline explosives, such as octogen, hexogen, pentaerythritol tetranitrate etc., can be incorporated. The polymer content is about 10 to 20 Wt .-%.

A problem with the manufacture of plastic explosive charges is that with increasing solids content, i.e. with increasing proportion of explosive, the viscosity of the mixture can increase so that pouring of this mixture becomes impossible. The theoretical limit for a flowable mixture is 92 Wt .-%. However, it has been shown that the practical limit for flowable Mixtures is approx. 90% by weight. In addition, explosive charges with one high solid content can only be poured if the grain sizes are suitable for the explosive charge explosive crystals used within a predetermined diameter interval lie, so that a relatively costly screening of grain fractions is required.

It is already known to add aluminum powder to plastic-bound explosive charges (see J. Köhler, R. Meyer "Explosivstoffe", 7th edition, Weinheim, Basel, Cambridge, New York, VCH 1991, pages 9 and 185). Due to the high warmth of education This admixture of aluminum oxide can be a considerable one Achieve calorie gain. An indication of an improvement in viscosity the explosive charge cannot be found in the literature mentioned above.

The invention has for its object a method for producing less sensitive pourable plastic-bound explosive charges with a high (e.g. Specify 90%) solid content, which one for casting the explosives have a sufficiently low viscosity without first screening out the grain fraction is required.

This object is achieved by the features of claim 1. Further, particularly advantageous configurations of the invention are disclosed in the subclaims.

The invention is essentially based on the idea of the respective explosive charge 0.1 to 10% by weight of very fine-grained vanadium, niobium, tantalum, chromium, molybdenum or tungsten powder or a mixture of two or more of these To add powders, the powder grains having an essentially spherical shape should have. When using this metal powder because of the spherical The shape of the powder grains has a very small specific surface Surprisingly shown that they are like liquid lubricants between the coarser ones Explosive particles act (tribological effect) so that they are relative low viscosities between 400 and 1200 Pas at 50 ° C result.

Explosive charges can be easily produced with the method according to the invention, which, despite a 90% solids content, have a viscosity without Use of appropriate metal powder with a solids content of 85% is achieved.

The use of spherical aluminum powder to reduce viscosity has not proven itself in practice, however, because such powder on the one hand very difficult to obtain and on the other hand very flammable and therefore it is in the Processing can easily lead to dust explosions.

Similar to the explosive charges to which aluminum powder is added also show the explosive charges according to the invention by the exothermic reaction of the metal powder increased blast effect caused by atmospheric oxygen. This effect contributes to the destruction of structures and buildings due to overpressure. Sublimate the resulting metal oxides, i.e. they go directly from the solid phase into the gas phase.

The percentage of the metal powder depends on the special surface of the Metal powder and the grain size and experience has shown that it is preferably between 2 and 5 wt .-%, while the grain size is preferably between 0.1 and 5 microns.

The preferred explosives are octogen (HMX), hexogen (RDX) and Pentaerythritol tetranitrate (PETRIN) has been shown to be beneficial.

The explosive charges according to the invention are produced using the following typical recipes: 80-88% by weight Crystalline explosives, e.g. RDX or HMX 10-20% by weight Binder, e.g. HTPB 5-10% by weight softener 0.01-02% by weight bonding agent 0.05-05% by weight coating aids 0.1-1.0% by weight antioxidant 0.1-10% by weight metal powder

Claims (3)

  1. A process for the production of pourable plastic-bound explosive charges, wherein a crystalline explosive is embedded in a polymer matrix consisting of a binder, a plasticizer and other auxiliary substances, characterized in that 0.1 to 10% by weight of a metal powder of one or more of the metallic explosive charge is used as a further auxiliary substance following metals: vanadium, niobium, tantalum, chromium, molybdenum or tungsten is added, metal powders being used, the powder grains of which have an essentially spherical shape.
  2. A method according to claim 1, characterized in that 2 to 5 wt .-% metal powder is added to the explosive charge.
  3. A method according to claim 1 or 2, characterized in that the grain size of the respective metal powder is selected such that it is between 0.1 to 5 µm.
EP20010124918 2000-11-25 2001-10-19 Process for producing mouldable, plastic-bound explosives Active EP1211232B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10058705 2000-11-25
DE2000158705 DE10058705C1 (en) 2000-11-25 2000-11-25 Pourable bursting charge consisting of crystalline explosive embedded in a polymer matrix, containing finely divided metal powder, e.g. vanadium, as solid lubricant to provide low viscosity at high solids content

Publications (3)

Publication Number Publication Date
EP1211232A2 true EP1211232A2 (en) 2002-06-05
EP1211232A3 EP1211232A3 (en) 2002-08-14
EP1211232B1 EP1211232B1 (en) 2005-09-07

Family

ID=7664740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010124918 Active EP1211232B1 (en) 2000-11-25 2001-10-19 Process for producing mouldable, plastic-bound explosives

Country Status (4)

Country Link
US (1) US6589374B2 (en)
EP (1) EP1211232B1 (en)
DE (2) DE10058705C1 (en)
NO (1) NO321217B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060011083A1 (en) * 2004-06-30 2006-01-19 Perry William L Microwave heating of energetic materials
GB0815936D0 (en) * 2008-08-29 2009-01-14 Bae Systems Plc Cast Explosive Composition
DE102010044344A1 (en) * 2010-09-03 2012-03-08 Rheinmetall Waffe Munition Gmbh Plastic-bound explosive formulation
DE102014007455A1 (en) * 2014-05-21 2015-11-26 TDW Gesellschaft für verteidigungstechnische Wirksysteme mbH Method for increasing the pressure of a composite charge

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255281A (en) * 1960-06-21 1966-06-07 North American Aviation Inc Propellant casting method
US3865035A (en) * 1969-01-16 1975-02-11 Thiokol Chemical Corp Multi-use munition
DE3804396C1 (en) * 1988-02-12 1989-05-18 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De Process for producing plastic-bonded explosives
DE4324739C1 (en) * 1993-07-23 1994-09-08 Deutsche Aerospace Cast polymer-bonded explosive charge
US5472531A (en) * 1992-12-01 1995-12-05 The United States Of America As Represented By The Secretary Of The Army Insensitive explosive composition

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969638A (en) * 1956-11-30 1961-01-31 Phillips Petroleum Co Solid propellant and propellant burning rate catalyst system
DE2952069C2 (en) * 1979-12-22 1983-02-17 Dynamit Nobel Ag, 5210 Troisdorf, De
DE3010052C2 (en) * 1980-03-15 1982-09-09 Friedrich-Ulf 8899 Rettenbach De Deisenroth
US4747892A (en) * 1987-05-22 1988-05-31 The United States Of America As Represented By The Secretary Of The Air Force Melt-castable explosive composition
US5388518A (en) * 1988-11-10 1995-02-14 Composite Materials Technology, Inc. Propellant formulation and process
US5942720A (en) * 1993-04-29 1999-08-24 Cordant Technologies Inc. Processing and curing aid for composite propellants
DE19616627A1 (en) * 1996-04-26 1997-11-06 Dynamit Nobel Ag Kindling mixtures

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255281A (en) * 1960-06-21 1966-06-07 North American Aviation Inc Propellant casting method
US3865035A (en) * 1969-01-16 1975-02-11 Thiokol Chemical Corp Multi-use munition
DE3804396C1 (en) * 1988-02-12 1989-05-18 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De Process for producing plastic-bonded explosives
US5472531A (en) * 1992-12-01 1995-12-05 The United States Of America As Represented By The Secretary Of The Army Insensitive explosive composition
DE4324739C1 (en) * 1993-07-23 1994-09-08 Deutsche Aerospace Cast polymer-bonded explosive charge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 118, no. 16, 19. April 1993 (1993-04-19) Columbus, Ohio, US; abstract no. 150531t, S.T. CHEN ET AL.: "Aluminium particle shape effects on the performance of solid composite propellants" Seite 172; XP000354147 & HUOYAO JISHU, Bd. 7, Nr. 4, 1991, Seiten 25-34, *

Also Published As

Publication number Publication date
NO321217B1 (en) 2006-04-03
EP1211232A3 (en) 2002-08-14
DE50107350D1 (en) 2005-10-13
US20020096233A1 (en) 2002-07-25
EP1211232B1 (en) 2005-09-07
DE10058705C1 (en) 2002-02-28
US6589374B2 (en) 2003-07-08
NO20015140L (en) 2002-05-27
NO20015140D0 (en) 2001-10-22

Similar Documents

Publication Publication Date Title
EP0684938B1 (en) Insensitive high performance explosive compositions
US3912561A (en) Pyrotechnic compositions for gas generation
US5531941A (en) Process for preparing azide-free gas generant composition
US5641938A (en) Thermally stable gas generating composition
US7011722B2 (en) Propellant formulation
US3986908A (en) Composite propellants with a cellulose acetate binder
EP0705808B1 (en) Propellant based on phase-stabilized ammonium nitrate
US4331080A (en) Composite high explosives for high energy blast applications
US7670446B2 (en) Wet processing and loading of percussion primers based on metastable nanoenergetic composites
DE60112231T2 (en) Hydrocarbon binder containing pyrotechnic gas generating compositions and methods for continuous production
ES2267650T3 (en) Method for stabilizing the density of pells that are generating gases and contain nitroguanidine.
US6533878B1 (en) Pyrotechnic compositions generating non-toxic gases based on ammonium perchlorate
KR100952063B1 (en) Semi-continuous two-component process for producing a composite explosive charge comprising a polyurethane matrix
EP0035376B1 (en) A process for the preparation of aluminium-containing high-energy explosive compositions
US4300962A (en) Ammonium nitrate explosive systems
EP0767155B1 (en) Heterogeneous gas generant charges
US5074938A (en) Low pressure exponent propellants containing boron
Landsem et al. Neutral Polymeric Bonding Agents (NPBA) and Their Use in Smokeless Composite Rocket Propellants Based on HMX‐GAP‐BuNENA
US8075715B2 (en) Reactive compositions including metal
US4288262A (en) Gun propellants containing polyglycidyl azide polymer
US3639183A (en) Gas generator compositions
DE19549157A1 (en) Pressable explosives with high efficiency
US9914671B1 (en) Solid electrically controlled propellants
DD220301A5 (en) Lead- and barium-free applications
EP0068528B1 (en) Cold formable, plastics-bound high power explosive and process for preparing it

Legal Events

Date Code Title Description
AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent to:

Free format text: AL;LT;LV;MK;RO;SI

RIC1 Information provided on ipc code assigned before grant

Free format text: 7C 06B 21/00 A, 7C 06B 33/08 B

AX Request for extension of the european patent to:

Free format text: AL;LT;LV;MK;RO;SI

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

17P Request for examination filed

Effective date: 20020704

AKX Designation fees paid

Designated state(s): DE FR GB SE

17Q First examination report despatched

Effective date: 20040225

RAP1 Rights of an application transferred

Owner name: RHEINMETALL WAFFE MUNITION GMBH

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20050907

REF Corresponds to:

Ref document number: 50107350

Country of ref document: DE

Date of ref document: 20051013

Kind code of ref document: P

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

ET Fr: translation filed
26N No opposition filed

Effective date: 20060608

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

PGFP Annual fee paid to national office [announced from national office to epo]

Ref country code: SE

Payment date: 20191021

Year of fee payment: 19

Ref country code: DE

Payment date: 20191021

Year of fee payment: 19

PGFP Annual fee paid to national office [announced from national office to epo]

Ref country code: FR

Payment date: 20191028

Year of fee payment: 19

PGFP Annual fee paid to national office [announced from national office to epo]

Ref country code: GB

Payment date: 20191021

Year of fee payment: 19