GB2258230A - Production of double-base propergol propellant blocks - Google Patents
Production of double-base propergol propellant blocks Download PDFInfo
- Publication number
- GB2258230A GB2258230A GB8229414A GB8229414A GB2258230A GB 2258230 A GB2258230 A GB 2258230A GB 8229414 A GB8229414 A GB 8229414A GB 8229414 A GB8229414 A GB 8229414A GB 2258230 A GB2258230 A GB 2258230A
- Authority
- GB
- United Kingdom
- Prior art keywords
- weight
- oxide
- base
- catalyst system
- nitramine
- 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
- 239000003380 propellant Substances 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title description 4
- 239000000843 powder Substances 0.000 claims abstract description 33
- POCJOGNVFHPZNS-ZJUUUORDSA-N (6S,7R)-2-azaspiro[5.5]undecan-7-ol Chemical compound O[C@@H]1CCCC[C@]11CNCCC1 POCJOGNVFHPZNS-ZJUUUORDSA-N 0.000 claims abstract description 21
- BSPUVYFGURDFHE-UHFFFAOYSA-N Nitramine Natural products CC1C(O)CCC2CCCNC12 BSPUVYFGURDFHE-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003054 catalyst Substances 0.000 claims abstract description 21
- POCJOGNVFHPZNS-UHFFFAOYSA-N isonitramine Natural products OC1CCCCC11CNCCC1 POCJOGNVFHPZNS-UHFFFAOYSA-N 0.000 claims abstract description 21
- 150000002148 esters Chemical class 0.000 claims abstract description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 16
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910001610 cryolite Inorganic materials 0.000 claims abstract description 14
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 14
- 239000011591 potassium Substances 0.000 claims abstract description 14
- 238000002485 combustion reaction Methods 0.000 claims abstract description 13
- 229920001220 nitrocellulos Polymers 0.000 claims abstract description 12
- 239000000020 Nitrocellulose Substances 0.000 claims abstract description 11
- SNIOPGDIGTZGOP-UHFFFAOYSA-N Nitroglycerin Chemical compound [O-][N+](=O)OCC(O[N+]([O-])=O)CO[N+]([O-])=O SNIOPGDIGTZGOP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229960003711 glyceryl trinitrate Drugs 0.000 claims abstract description 11
- XTFIVUDBNACUBN-UHFFFAOYSA-N 1,3,5-trinitro-1,3,5-triazinane Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)C1 XTFIVUDBNACUBN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 claims abstract description 7
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 36
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical group [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 18
- 229960004643 cupric oxide Drugs 0.000 claims description 14
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 claims description 13
- 238000000465 moulding Methods 0.000 claims description 12
- 239000004014 plasticizer Substances 0.000 claims description 11
- 239000005751 Copper oxide Substances 0.000 claims description 8
- 229910000431 copper oxide Inorganic materials 0.000 claims description 8
- 229910000464 lead oxide Inorganic materials 0.000 claims description 6
- 229940112669 cuprous oxide Drugs 0.000 claims description 5
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 4
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 5
- 229910052802 copper Inorganic materials 0.000 claims 5
- 239000010949 copper Substances 0.000 claims 5
- UZGLIIJVICEWHF-UHFFFAOYSA-N octogen Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)CN([N+]([O-])=O)C1 UZGLIIJVICEWHF-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000028 HMX Substances 0.000 abstract description 5
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 7
- URAYPUMNDPQOKB-UHFFFAOYSA-N triacetin Chemical compound CC(=O)OCC(OC(C)=O)COC(C)=O URAYPUMNDPQOKB-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000006230 acetylene black Substances 0.000 description 3
- 235000013773 glyceryl triacetate Nutrition 0.000 description 3
- 239000001087 glyceryl triacetate Substances 0.000 description 3
- 229960002622 triacetin Drugs 0.000 description 3
- RUKISNQKOIKZGT-UHFFFAOYSA-N 2-nitrodiphenylamine Chemical compound [O-][N+](=O)C1=CC=CC=C1NC1=CC=CC=C1 RUKISNQKOIKZGT-UHFFFAOYSA-N 0.000 description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 2
- KHKWHTCWOCAWME-UHFFFAOYSA-N acetylene benzene Chemical compound C#C.C1=CC=CC=C1.C#C KHKWHTCWOCAWME-UHFFFAOYSA-N 0.000 description 2
- PZIMIYVOZBTARW-UHFFFAOYSA-N centralite Chemical compound C=1C=CC=CC=1N(CC)C(=O)N(CC)C1=CC=CC=C1 PZIMIYVOZBTARW-UHFFFAOYSA-N 0.000 description 2
- OYVYCHSRRKLRPN-UHFFFAOYSA-N 2-(hydroxymethyl)propane-1,3-diol nitric acid Chemical compound [N+](=O)(O)[O-].[N+](=O)(O)[O-].C(O)C(CO)CO OYVYCHSRRKLRPN-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- QQKUDWAZRXJINS-UHFFFAOYSA-N [N+](=O)(O)[O-].[N+](=O)(O)[O-].C(O)C(C)(CO)CO Chemical compound [N+](=O)(O)[O-].[N+](=O)(O)[O-].C(O)C(C)(CO)CO QQKUDWAZRXJINS-UHFFFAOYSA-N 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- AGCQZYRSTIRJFM-UHFFFAOYSA-N triethylene glycol dinitrate Chemical compound [O-][N+](=O)OCCOCCOCCO[N+]([O-])=O AGCQZYRSTIRJFM-UHFFFAOYSA-N 0.000 description 1
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
- C06B25/34—Compositions containing a nitrated organic compound the compound being a nitrated acyclic, alicyclic or heterocyclic amine
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/007—Ballistic modifiers, burning rate catalysts, burning rate depressing agents, e.g. for gas generating
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The propellant blocks are produced from a base powder comprising nitrocellulose (of nitrogen content 11.5 to 13% by weight), a nitramine (octogen and/or hexogen) and a combustion catalyst system. The base powder is gelatinised in a mould at an elevated temperature by means of a nitric ester (e.g. nitro-glycerine) as in French Specification 2165093. The improvement is that the catalyst system comprises at least one oxide of lead (e.g. PbO), Cu2O and/or CuO, acetylene- or benzene-black and, optionally, potassium cryolite. This enables a block to be obtained with high nitramine content (35 to 60% by weight), the resulting block having enhanced rate of combustion while still retaining uniformity of combustion.
Description
Production of double-base propergol
propellant blocks
The present invention is concerned with the production of double-base propergol propellant blocks with a high nitramine content. (The term double-base propergol propellant is used herein in its usual sense to refer to a propergol propellant containing both nitrocellulose and a nitrated oil, such as nitroglycerine.)
It is known to add nitramines to double-base propergol propellants, examples of such nitramines being octogen (X, or cyclotetramethylene-tetranitramine) and hexogren (RDX, or cyclotrimethylenetrinitramine). However, it is known to be disadvantageous to have a too high nitramine content; for example, the publication KUBOTA Proceedings
International Symposium Space Technol. Sci.Ilth, 1975 pages 157-176 shows that for a composition containing 26.8% by weight of octogen, the rate of coibution (V j is impaired and the "plateau" in the graph of V against pressure (P) for a given tempera-
c ture disappears.
French Specification 2165093 (andits British equivalent, No. 1371458) discloses the production of a double-base propergol propellant containing a nitramine by gelatinising a nitramine- and nitrocellulosecontaining base powder in a mould by means of a composition comprising a nitric ester, a plasticiser and a solvent. However, the amount of nitramine in the resulting composition is restricted to a maximum of 26% by weight, in order to avoid disappearance of the above-mentioned plateau.
We have now developed an improved method of producing a double-base propergol propellant having a high nitramine content, whereby the resultant propellant has increased rate of combustion while retaining substantial uniformity of combustion.
According to the invention, there is provided a method of preparing a double-hase propergol propellant; using a base powder comprising nitrocellulose having a nitrogen content of 11.5 to 13/o by weight, at least one nitramine and a combustion catalyst system. The base powder is gelatinised in a mould at an elevated temperature using a composition comprising a nitric ester, optionally at least one plasticiser, and a stabiliser, n such amounts that the nitric ester and the nitramine are present in the resulting block in amounts of 5 to 30% by weight and 35 to 60% by weight, respectively (that is, with a greater proportion of nitranine than is present in prior art compositions).The catalyst system is used in the method according to the invention comprises at least one oxide of lead at least one of cuprous oxide and cupric oxide, and acetylene-black or benzene-black. In a preferred embodiment of the present invention, the catalyst system also contains potassium cryolite.
The base powder may also contain at least one plasticiser; the plasticiser content of the resulting block or base powder is preferably not more than 50% by weight; for higher nitramine contents, the plasticiser is preferably present in an amount of less than 35d- by weight. (The plast;iciser content of the bloc is the percentage by weight of nitrated oil plus optional,plasticiser based on nitrated oil, optional plasticiser and nitrocellulose) The oxide of lead used in the method according to the invention may be one or more of PbO, Pb3 04, Pb2 03, Pb2O and PbO;; lead monoxide (PbO) is preferred.The catalyst system also contains cuprous oxide and/or cupric oxide, and acetylene- or benzeneblack and, optionally potassium cryolite. In the absence of potassium cryolite, it is preferred that the proportion of the catalyst system in the moulding powder amounts to no more than 5% by weight, while in the presence of potassium cryolite, it is preferred that the catalyst system amounts to no more than 10% based on the weight of the moulding powder.
A preferred catalyst system containing no potassium cryolite is as follows: 0.5 to 3 (more preferably 0.5 to 2)% lead oxide(s) 0.5 to 3 (more preferably 0.5 to 2)o copper oxide(s) 0.1 to 1.5 (more preferably 0.2 to 1.5) acetylene
or benzene-black
All these percentages are based on the weight of moulding powder.
A preferred catalyst system containing potassium cryolite is as follows (the percentages being on the same basis as just mentioned): 0.5 to 4 (more preferably 1 to 3.5) lead oxide) 0.5 to 4 (more preferably 1 to 3.5)% copper oxide(s) 0.1 to 2 (more preferably 0.5 to 1.8)so acetylene- or
benzene-black 0.1 to 4 (more preferably 1 to 3.5)% potassium cryolite.
When potassium cryolite is absent, the copper oxide is preferably cuprous oxide rather'than cupric oxide because the former enables compositions with lower pressure exponent and temperature coefficient to be obtained for an equivalent combustion rate.
On the other hand, when potassium cryolite is present, the copper oxide is preferably cupric oxide.
The amount of acetylene-black or benzene-black present in the final block is preferably not more than 1% by weight, more preferably 0.2 to 0.7%, in order to obtain optimum regulation of the combustion rate.
As mentioned above, the nitrocellulose used in the method according to the invention has a nitrogen content of 11.5 to 13% by weight. It is preferred that the nitrocellulose is a single nitrocellulose with a nitrogen content of about 12.7% by weight, or a mixture of nitrocelluloses having nitrogen contents in the range 11.6 to 12.8% by weight. (The use of the latter mixture does slightly reduce the energy potential (which for nitrocellulose increases with nitrogen content), sut otherwise improves the performance of the propellant composition).
The nitric ester used to geiatinise the base powder in the method according to the invention may be, for example, triethylene glycol dinitrate, trimethylolethane dinitrate, trimethylol-methane dinitrate or nitroglycerine; nitroglycerine is preferred.
When nitroglycerine is used, it may also be included in the base powder; the amount thereof is preferably not more than 30% by weight (so as'to ensure that the material is sufficiently firm, particularly when heated).
A preferred amount of nitric ester is 9 to 21 < by weight.
The stabiliser present in the nitric ester may be, for example, 2-nitro-diphenylamine (2-NDPh) or
Centralite (a dialkyldiphenyl urea).
A plasticiser is preferably preseht in the composition used to gelatinise the base powder; the plasticiser may be, for example, triacetin or an aromatic ester such-as dioctyl phthalate.
In a preferred embodiment, the nitric estercontaining composition used to gelatinise the base powder in the method according to the invention is as follows:
nitroglycerine 72 to 83% by weight
triacetin 27.5 to 16% by weight
2-NDPA or Centralite 0.5 to 1% by weight
The nitric ester-containing composition is preferably used in an amount of 25 to 38% by weight (more preferably 27 to 35% by weight) based on the weight of base powder.
The nitramine used in the method according to the invention is preferably hexogen and/or octogen; hexogen is preferred as it gives a high combustion rate and low pressure exponent. The amount of nitramine used is preferably from 37 to 57% by weight.
The resulting propellant block preferably has a degree of plasticisation of less than 75 or 703 the block preferably comprises 26 to 43% of nitroglycerine and 24 to 42% of nitramine.
The propellant block produced by the method according to the invention may have a rate of combustion of 7 to 15 mm per second and a calorimetric potential greater than 1000 calories per gram. The block may be used over the range of pressure- 30 to 200 bars, depending on the details of the catalyst system used (and, particularly, on the amount of acetylene- or benzene-black).
The method of gelatinising the base powder in the method according to the invention,. in which the nitric ester-containing composition is introduced into a mould containing the base powder and heating the mould is preferably described in the above-mentioned
French Specification 2165093 and Brit-isil Specification 1714is).
In order that the present invention may be more fully understood, the following Examples (in which all parts and percentages are by weight) are given by way of illustration only. In all the Examples, a base powder was gelatinised with the following composition (Composition A).
Nitroglycerine 78% Triacetin 21%
2-NDPA 1% Examples 1 to 8
The base powders used had the following compositions:
Example 1 2 3 4 5 6 7 8
Nitrocellulose N=12.6 # 0.1% 43.5 33 28 33 43.5 36 33 31.5
Nitroglycerine 10.5 10.5 10.5 10.5 10.5 15 10 14.5
Hexogen 40 50.5 55.5 50.5 - 45 47 43
Octogen - - - - 40 - -
Dioctyl phthalate 2 2 2 2 2 - - 2-NDPA 2 2 2 2 2 2 2 2
PbO 1 1 1 1 1 1 2 3
Cu2O 1 1 1 1 1 1 -
CuO - - - 1 - - 2 3
CK - - - - - - 3 1.5
Acetylene black 0.1-0.3 0.1-0.5 0.5 0.1-0.5 0.3 0.3-0.5 1 1.5 The energetic potentials of some of the resulting blocks were measured, and V (the rate of combustion) of each block was plotted against P (the pressure), as shown in the accompanying drawings. The results are summarised in the following Table.
Example Energetic potential (cals/g). Figure 1 1055 1a(0.1% black)
1b(0.3% black
lc(0.5% black) 2 1075 2a(0.1% black)
2b(0.2% black)
2c(0.5% black) 3 1092 3 4 - 4 5 1046 5 6 - 6(0.3% black)
7(0.5% black) 7 1050 8 8 1049 9
Claims (14)
- CLAIMS: 1. A method of preparing a double-base propergol propellant block which comprises providing a base powder comprising nitrocellulose having a nitrogen content of 11.5 to 13% by weight, at least one nitramine and a combustion catalyst system, gelatinising the base powder in a mould at elevated temperature by means of a composition comprising a nitric ester and a stabiliser, in such amounts that the nitric ester and the nitramine are present in the resulting block in amounts of O to 30 by weight and 35 to 60% by weight, respecti-ely, and the plasticiser content of the moulding powder being no more than 50 by weight, the catalyst system comprising at least one oxide of lead, at least one oxide of copper, and acetylene- or benzeneblack.
- 2. A method according to claim 1, in which the catalyst system comprises 0.5 to 3% of said oxide(s) of lead, C.5 to 3% of said oxide(s) of copper, and 0.1 to 1.5% of acetylene- or benzeneblack, the percentages being based on the weight of said base powder.
- 3. A method according to claim 1 or 2, in which the oxide of copper is cuprous oxide.
- 4. A method according to claim 1, in which the catalyst system further contains potassium cryolite.
- 5. A method according to claim 4, in which the catalyst system comprises 0.5 to 4% of said oxide(s) of lead,- 0.5 to 4% of said oxide(s) of copper, 0.1 to 2% of acetylene- or benzene-black and 0.5 to 4% of potassium cryolite, the percentages being based on the weight of said base powder.
- 0. A method according to claim 4 or 5 in which the oxide of copper is cupric oxide.
- 7. A method according to any of claims 1 to 6, in which the oxide of lead is lead monoxide.
- 8. A method according to any of claims 1 to 7, in which the nitramine is hexogen.
- 9. A method according to claim 8, in which the base powder contains 37 to 57% by weight of hexogen.
- 10. A method according to any of claims 1 to 9, in which the amount of ntric ester is 37 to 57% by weight.
- 11. A method according to any of claims 1 to 10, in which the base powder further comprises a nitric ester, preferably in an amount of 9 to 21% by weight.
- 12. A method of preparing a double-base propergol propellant block, substantially as herein described in any of the Examples.
- 13. A double-base propergol propellant block, when produced by a method according to any of claims 1 to 12.
- 14. A block according to claim 12 or 13, which contains 26 to 43% by weight of nitroglycerine and 24 to 42% by weight of nitramine.14. A block according to claim 13, which has a plasticisation degree of less than 75% by weight.15. A block according to claim 13 or 14, which contains 26 to 43% by weight of nitroglycerine and 24 to 42% by weight of nitramine.Amenctnents to the cIakns have been fled 86 follows 1. A method of preparing a double-base propergol propellant block, which comprises introducing a moulding solvent comprising a nitric ester and a stabiliser, into a mould containing a moulding powder comprising nitrocellulose having a nitrogen content of 11.5 to 13% by weight, at least one nitramine, and a combustion catalyst system, and, optionally, a nitric ester and a plasticiser, and curing the mixture to effect gelatinisation of the moulding powder, the moulding powder containing from 35 to 60% by weight of nitramine and from 0 to 30% by weight of nitric ester, and having a degree of plasticisation of from O to 50% by weight, and the catalyst system comprising at least one lead oxide, at least one copper oxide, and acetylene or benzene black.2. A method according to claim 1, in which the catalyst system comprises 0.5 to 3% of lead oxide(s)0.5 to 3X0 of coppery and 0.1 to 1.5% of acetylene or benzene black, the percentages being based on the weight of the moulding powder.3. A method according to claim 1 or 2, in which the copperoxide is cuprous oxide.4. A method according to claim 1, in which the catalyst system further contains potassium cryolite.5. A method according to claim 4, in which the catalyst system comprises 0.5 to 4% of lead oxide(s), 0.5 to 4% of copper oxide(s), 0.1 to 2% of acetylene or benzene black, and 0.5 to 4% of potassium cryolite, the percentages being based on the weight of the moulding powder 6. A method according to claim 4 or 5 in which the copper oxide is cupric oxide.7. A method according to any of claims 1 to 6, in which the lead oxide is lead monoxide.8. A method according to any of claims 1 to 7, in which the nitramine is hexogen.9. A method according to claim 8, in which the moulding powder contains 37 to 57% by weight of hexogen.10. A method according to any of claims 1 to 9, in which the moulding powder contains 9 to 21% by weight of nitric ester.11. A method of preparing a double-base propergol propellant block, substantially as herein described in any of the Examples.12. A double base propergol propellant block, when produced by the method claimed in any of claims 1 to 11.13. A block according to claim 12, which has a degree of plasticisation of less than 75% by weight.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8211136A FR2681065B2 (en) | 1981-07-16 | 1982-06-25 | MOLDING PROCESS FOR THE MANUFACTURE OF A DOUBLE BASED PROPERGOL BLOCK WITH A HIGH NITRAMINE RATE AND PROPERGOL BLOCK OBTAINED BY THIS PROCESS. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2258230A true GB2258230A (en) | 1993-02-03 |
| GB2258230B GB2258230B (en) | 1993-10-13 |
Family
ID=9275392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8229414A Expired - Lifetime GB2258230B (en) | 1982-06-25 | 1982-10-14 | Production of double-base propergol propellant blocks |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3244444C1 (en) |
| GB (1) | GB2258230B (en) |
| IT (1) | IT1238358B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1857429A1 (en) * | 2006-05-19 | 2007-11-21 | Nitrochemie Wimmis AG | Propulsive means for accelerating projectiles |
| US8795451B2 (en) | 2010-05-18 | 2014-08-05 | Diehl Bgt Defence Gmbh & Co. Kg | Propellant and process for producing a propellant |
| WO2018055312A1 (en) | 2016-09-26 | 2018-03-29 | Arianegroup Sas | Composite pyrotechnic product containing an anti-gleam agent of potassium salt type |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5348596A (en) * | 1989-08-25 | 1994-09-20 | Hercules Incorporated | Solid propellant with non-crystalline polyether/inert plasticizer binder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1277192A (en) * | 1965-12-30 | 1972-06-07 | Us Gov Sec Army | Improvements in and relating to nitrocellulose base propellant compositions |
| GB1279961A (en) * | 1964-02-28 | 1972-06-28 | Us Army | Improvements in or relating to nitrocellulose base compositions |
| GB1371458A (en) * | 1971-12-17 | 1974-10-23 | Poudres & Explosifs Ste Nale | Propellant powder compositions |
| GB1408554A (en) * | 1966-09-01 | 1975-10-01 | Us Navy | Crosslinking of double base propellants |
| GB2038796A (en) * | 1979-01-02 | 1980-07-30 | Nitrochemie Gmbh | Multi-base propellants |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1603394A (en) * | 1968-10-15 | 1971-04-13 |
-
1982
- 1982-10-14 GB GB8229414A patent/GB2258230B/en not_active Expired - Lifetime
- 1982-11-09 IT IT8268312A patent/IT1238358B/en active
- 1982-12-01 DE DE3244444A patent/DE3244444C1/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1279961A (en) * | 1964-02-28 | 1972-06-28 | Us Army | Improvements in or relating to nitrocellulose base compositions |
| GB1277192A (en) * | 1965-12-30 | 1972-06-07 | Us Gov Sec Army | Improvements in and relating to nitrocellulose base propellant compositions |
| GB1408554A (en) * | 1966-09-01 | 1975-10-01 | Us Navy | Crosslinking of double base propellants |
| GB1371458A (en) * | 1971-12-17 | 1974-10-23 | Poudres & Explosifs Ste Nale | Propellant powder compositions |
| GB2038796A (en) * | 1979-01-02 | 1980-07-30 | Nitrochemie Gmbh | Multi-base propellants |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1857429A1 (en) * | 2006-05-19 | 2007-11-21 | Nitrochemie Wimmis AG | Propulsive means for accelerating projectiles |
| US8353994B2 (en) | 2006-05-19 | 2013-01-15 | Nitrochemie Wimmis Ag | Propulsion system for the acceleration of projectiles |
| US8795451B2 (en) | 2010-05-18 | 2014-08-05 | Diehl Bgt Defence Gmbh & Co. Kg | Propellant and process for producing a propellant |
| WO2018055312A1 (en) | 2016-09-26 | 2018-03-29 | Arianegroup Sas | Composite pyrotechnic product containing an anti-gleam agent of potassium salt type |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1238358B (en) | 1993-07-13 |
| IT8268312A0 (en) | 1982-11-09 |
| GB2258230B (en) | 1993-10-13 |
| DE3244444C1 (en) | 1996-01-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Effective date: 20021013 |