EP1333016A2 - Procédé semi-continu de coulée de pâte de propergol solide, ledit procédé mettant en oeuvre deux composants - Google Patents
Procédé semi-continu de coulée de pâte de propergol solide, ledit procédé mettant en oeuvre deux composants Download PDFInfo
- Publication number
- EP1333016A2 EP1333016A2 EP03290124A EP03290124A EP1333016A2 EP 1333016 A2 EP1333016 A2 EP 1333016A2 EP 03290124 A EP03290124 A EP 03290124A EP 03290124 A EP03290124 A EP 03290124A EP 1333016 A2 EP1333016 A2 EP 1333016A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- components
- approximately
- group
- groups
- mixture
- 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.)
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Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0033—Shaping the mixture
- C06B21/0058—Shaping the mixture by casting a curable composition, e.g. of the plastisol type
Definitions
- the present invention is in the field of solid propellant blocks or loads.
- the invention relates to a process preparation and pouring of a propellant paste, composite type, in a mold to prepare a block or a load of solid propellant.
- the invention applies in particular to the manufacture of wholesale space launcher loads.
- a solid propellant of the composite type comprises a solid or binder polymer matrix, solid fillers pulverulent: oxidizing, possibly reducing and / or energy and various additives feasibility, performance.
- the binder is prepared from a resin polymerizable liquid with chemically terminated reagents that are going to be crosslinked by at least one also crosslinking liquid.
- the resin hardening by baking at a temperature compatible with the presence of materials pyrotechnics, will coat all the ingredients and especially the powdery charges to form a body solid.
- the ingredients are chosen to ensure the combustion of the propellant to produce gases. This combustion is generally done in parallel layers: the flame front regression speed is a few millimeters to a few centimeters per second.
- the process currently used to manufacture such blocks is a discontinuous process, called "batch", consisting in preparing a certain quality of product and to sink a number of loads.
- a first step the different ingredients are introduced in an appropriate order and carefully and mixed for a long time, under conditions of pressures (usually vacuum) and temperatures well accurate.
- this mixture which present in the form of a paste is poured into a mold, with shaping tools. The whole undergoes baking to harden the dough.
- the mold in some cases constitutes the very envelope of the propellant, envelope which is suitably prepared for carrying out the loading.
- the process described in this article consists of separate the composition into two groups of components of equivalent viscosity which are then mixed, in a mass ratio close to 1/1, just before casting in the mold.
- One of the component groups has the polymer to constitute the binder, half of the powder fillers and certain additives; the other group of components includes the crosslinker, too in the form of a polymer, the other half of the fillers and the rest of the additives.
- the final composition obtained, in particular by the binder is different from that of the "batch" process since the two-component process forms the binder from of the mixture of two polymers: the propellant thus obtained must be re-approved for the intended use. It is a long operation and expensive.
- the present invention incorporating a technique bicomponent aims to solve problems previously laid.
- the present invention therefore relates to a method semi-continuous bicomponent for the casting of dough propellant in a mold to make a block of solid propellant by cooking the dough, said dough comprising a liquid prepolymer, a crosslinker liquid, at least one solid powdery charge and various additives, pouring from mixture of two groups of components and said process is characterized in that the first group of components represents about 80% to about 99% of the finished product and essentially comprises the prepolymer, all powdery solid charges and part additives; the second group of components represents about 20% to about 1% of the finished product and includes all of the crosslinker and the other part of the additives.
- the additives will notably include a part propellant plasticizer. We can still say that the mass ratio of mixing of the two groups of components is between about 80/20 and about 99/1.
- the first group of components represents about 90% to about 99% of the finished product and the second group of components represents approximately 10% about 1% of the finished product.
- the mass report of mixture of the two groups of components is between around 90/10 and around 99/1.
- the propellant binder is either obtained from a carboxy-telechetic polybutadiene or, preferably, hydroxyletumblechCode crosslinked in the latter case with an isocyanate in the form of a monomer, i.e. binder is obtained from an oxetane prepolymer or substituted oxirane; nitramine or nitrate polymer; polyester or polyether.
- Powder fillers have at least one oxidizing charge chosen from the group of perchlorates or non-organic nitrates for example nitrate ammonium or ammonium perchlorate.
- a part of these oxidizing powder fillers can be replaced by energetic charges such as nitramines, for example octogen or hexogen.
- powdery fillers can also understand, to increase the performance of the propellant, reducing charges in powder form metallic, for example aluminum.
- plasticizer and its rate in the first group of components avoids problems of settling solid charges during the period of storage of this group of components.
- the second group of components only includes liquid crosslinker monomer, without any of the propellant additives that are all incorporated into the first group of components.
- the two mixing steps are decoupled by the passage of the mixture put to the quantity in a buffer tank, before being taken up for the homogenization mixture.
- the residence time in the buffer tank is as short as possible.
- the two mixing steps are done by all appropriate means, but preferably they are by static mixers.
- the mixing of quantity is done at low pressure and the homogenization mixture is done at high pressure.
- Decoupling the two stages by passing the mix put into quantity in a buffer tank allows to resume said mixture at high pressure for do the homogenization mixing step and pour the dough with a high flow rate. This high flow is necessary for casting, under conditions satisfactory economic, large loads.
- the quantity mixing is made at low pressure between about 0.006MPa and about 1MPa; and the homogenization mixture is done at high pressure between about 2MPa and about 2.5MPa.
- the homogenization mixture is done at the cooking temperature of the dough propellant, between about 20 ° C and about 80 ° C.
- Cooking temperature may be lowered by increasing the catalyst rate crosslinking among additives.
- the mixture and the pouring at the same temperature as that of cooking a the advantage of limiting withdrawal problems thermal.
- the mixture of the two groups of components is done in one step.
- the mixing is done by any means appropriate but preferably it is done in a static mixer, fed in mass ratio desired.
- the static mixer works at high pressure, between about 2MPa and about 2.5MPa.
- the mixing is done, as before, at the cooking temperature of the propellant paste between about 20 ° C and about 80 ° C. This temperature of cooking can be lowered to the lower limit, by increasing the rate of crosslinking catalyst.
- This invention essentially characterized by a particular choice of the two groups of components which will be mixed in an accurate mass ratio solves the problems left hanging by the process bicomponent of the state of the art.
- the mixing sequences to prepare the two component groups are completely independent of those of their mixture and their casting which can intervene very long after the preparation of these two groups of components.
- the second group of components is essentially liquid and mixes easily with the first group of components presented to it under form of a paste.
- the binder obtained will be identical to that of the "batch" process, so the final composition being the same, the propellant does not will not have to be re-certified which reduces considerably the costs.
- Figure 1 describes an installation to set up works the invention according to a first mode in two stages decoupled.
- Figure 2 describes an installation to set up works the invention according to a second mode in a single step.
- the second group of components which essentially includes the liquid crosslinker under monomeric form is possibly some additives, is very simple to prepare. It is a mixture with mechanical agitation for example. This group of components represents only a small mass of the finished product, a only one tank will be enough to store it.
- the first group of components includes liquid prepolymer, all fillers powdery solids and additives must be prepared with the same precautions and care as a propellant.
- the mixture constituting this group of components is chemical stable since there is no crosslinker; the choice suitable plasticizer avoids settling of solid charges and allows to keep so prolonged mixing in secure facilities appropriate.
- This group of components represents the majority of finished product and in the case of a large load (by example 100t), a large quantity of product required prepare by several mixers and store in several tanks taking into account the sizes of the mixers and tanks available.
- Figure 1 very schematically shows a installation for implementing the process the invention according to a first variant.
- the tanks 1 and 2 respectively containing the first and second groups of components supply a static mixer 3.
- the quantity mixing kit of the first group of components exceeds the capacity of a single tank. Simply have several type 1 tanks on the supply static mixer 3 and by a special system of winnowing to draw the mixture successively in the tanks.
- Figure 2 very schematically shows a installation for implementing the method according to a second variant.
- the tanks 10 and 12 respectively contain the first and second groups of components.
- the dosing and pressurization pumps are chosen in the classic material: they are either peristaltic pumps, i.e. screw pumps (for example STEIBLE brand) or double piston pumps alternative (for example PUTZMEISTER brand) or by pistons directly placed on the tanks of the two component groups.
- Static mixers are conduits containing braces forcing the dough passing through to separate and remix. These conduits are dimensioned in diameter, depending on the flow and number of unit elements ensures the quality of the mixture depending on the pressure available. We use 4 unit elements for low pressure mixing and up to 12 unit elements for high mixing pressure.
- a mixer made up of unitary elements double wall allows by the circulation of a fluid suitable coolant to heat to the temperature of desired casting the propellant paste.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- Molecular Biology (AREA)
- Crystallography & Structural Chemistry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
Description
- une première étape de mise à la quantité, par un dosage précis des deux groupes de composants dans le rapport massique souhaité, les deux groupes de composants sont alors sommairement mélangés,
- une deuxième étape d'homogénéisation, au cours de laquelle le mélange sommaire précédent est soigneusement mélangé, avant la coulée dans le moule.
Claims (12)
- Procédé bicomposant semi-continu pour la coulée de pâte de propergol dans un moule pour fabriquer un bloc de propergol solide, ladite pâte comprenant un polymère liquide, un réticulant, au moins une charge solide pulvérulente et divers additifs, la coulée se faisant à partir du mélange de deux groupes de composants caractérisé en ce que le premier groupe de composants représente environ 80% à environ 99% du produit fini et comprend essentiellement le polymère, les charges solides pulvérulentes et une partie des additifs ; le deuxième groupe de composants représente environ 20% à environ 1% du produit fini et comprend tout le réticulant et l'autre partie des additifs.
- Procédé selon la revendication 1, caractérisé en ce que le premier groupe de composants représente environ 90% à environ 99% du produit fini et que le deuxième groupe de composants représente environ 10% à environ 1% du produit fini.
- Procédé selon la revendication 1 ou 2, caractérisé en ce que le deuxième groupe de composant ne comprend que le réticulant.
- Procédé selon la revendication 1, 2 ou 3, caractérisé en ce que le mélange se fait en deux étapes :une première étape de mise à la quantité, par un dosage précis des deux groupes de composants mélangés à basse pression,une deuxième étape d'homogénéisation à haute pression du mélange précédent.
- Procédé selon la revendication 4, caractérisé en ce que les deux étapes sont découplées par le passage du mélange mis à la quantité dans un réservoir tampon.
- Procédé selon la revendication 4 ou 5, caractérisé en ce que les deux étapes successives se font dans des mélangeurs statiques respectivement à basse pression et à haute pression.
- Procédé selon la revendication 6, caractérisé en ce que le mélange de mise à la quantité ; à basse pression se fait entre 0,006MPa et 1MPa.
- Procédé selon la revendication 6, caractérisé en ce que le mélange d'homogénéisation, à haute pression, se fait entre 2MPa et 2,5MPa.
- Procédé selon la revendication 8, caractérisé en ce que le mélange d'homogénéisation se fait à la température de cuisson entre environ 20°C et environ 80°C.
- Procédé selon la revendication 1, 2 ou 3 caractérisé en ce que le mélange des deux groupes de composants se fait en une seule étape.
- Procédé selon la revendication 10, caractérisé en ce que le mélange des deux groupes de composant se fait dans un mélangeur statique à haute pression.
- Procédé selon la revendication 11, caractérisé en ce que le mélange se fait à la température de cuisson, entre environ 20°C et environ 80°C.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0201214A FR2835520B1 (fr) | 2002-02-01 | 2002-02-01 | Procede bicomposant semi-continu de coulee de pate de propergol solide |
| FR0201214 | 2002-02-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1333016A2 true EP1333016A2 (fr) | 2003-08-06 |
| EP1333016A3 EP1333016A3 (fr) | 2010-10-13 |
Family
ID=8871444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03290124A Withdrawn EP1333016A3 (fr) | 2002-02-01 | 2003-01-17 | Procédé semi-continu de coulée de pâte de propergol solide, ledit procédé mettant en oeuvre deux composants |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6936120B1 (fr) |
| EP (1) | EP1333016A3 (fr) |
| FR (1) | FR2835520B1 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2980373A1 (fr) * | 2011-09-26 | 2013-03-29 | Sme | Procede d'extraction de charges solubles contenues dans une pate |
| FR3051134A1 (fr) * | 2016-05-12 | 2017-11-17 | Herakles | Installation destinee a la fabrication d'une composition polymerique chargee |
| RU2660101C1 (ru) * | 2017-07-14 | 2018-07-04 | Федеральное государственное унитарное предприятие "Федеральный центр двойных технологий "Союз" (ФГУП "ФЦДТ "Союз") | Способ изготовления заряда смесевого ракетного твердого топлива |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840351B (zh) * | 2016-03-22 | 2018-11-16 | 天津大学 | 一种将凝胶或膏状燃料供应至发动机燃烧室的方法 |
| RU2621800C1 (ru) * | 2016-06-28 | 2017-06-07 | Акционерное общество "Федеральный научно-производственный центр "Алтай" | Способ изготовления зарядов смесевого ракетного твердого топлива |
| RU2637330C1 (ru) * | 2016-07-07 | 2017-12-04 | ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ КАЗЕННОЕ ВОЕННОЕ ОБРАЗОВАТЕЛЬНОЕ УЧРЕЖДЕНИЕ ВЫСШЕГО ОБРАЗОВАНИЯ "Военная академия Ракетных войск стратегического назначения имени Петра Великого" МИНИСТЕРСТВА ОБОРОНЫ РОССИЙСКОЙ ФЕДЕРАЦИИ | Способ приготовления коллоидной пасты |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1605257A (en) * | 1960-10-31 | 1986-09-24 | Aerojet General Co | Sustainer propellant |
| US4517035A (en) * | 1976-01-16 | 1985-05-14 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence | Method of making a castable propellant |
| NO140968C (no) * | 1977-04-04 | 1979-12-19 | Dyno Industrier As | Anlegg for blanding av pulveraktige materialer |
| FR2640261B1 (fr) * | 1979-08-14 | 1993-12-10 | Poudres Explosifs Ste Nale | Composition autopyrolysable pour la propulsion aerobie dont l'oxydant est un explosif |
| US4632715A (en) * | 1985-12-10 | 1986-12-30 | The United States As Represented By The Secretary Of The Navy | Low burn rate motor propellant |
| DE4115201A1 (de) * | 1990-05-11 | 1992-01-09 | Reinhardt Technik Gmbh & Co | Vorrichtung zum mischen von mehr-komponentengemischen |
| US5114630A (en) * | 1990-09-21 | 1992-05-19 | The United Of America As Represented By The Secretary Of The Navy | Continuous manufacture and casting |
| DE4119415A1 (de) | 1991-06-13 | 1992-12-17 | Huebers Verfahrenstech | Verfahren zum transport und zur aufbereitung von und zur beschickung einer giessanlage mit giessharz, sowie vorrichtung zur ausfuehrung des verfahrens |
| US5271778A (en) * | 1991-12-27 | 1993-12-21 | Hercules Incorporated | Chlorine-free solid rocket propellant for space boosters |
| DE4313171A1 (de) * | 1993-04-22 | 1994-10-27 | Micafil Vakuumtechnik Ag | Vorrichtung zum Vergiessen eines Volumens mit einer flüssigen, reaktiven Giessharzmasse |
| US5942720A (en) * | 1993-04-29 | 1999-08-24 | Cordant Technologies Inc. | Processing and curing aid for composite propellants |
| DE19520731A1 (de) * | 1995-06-07 | 1996-12-12 | Bayer Ag | Thermoplastische Polyurethanharnstoff-Elastomere |
| US6435854B1 (en) * | 1999-11-12 | 2002-08-20 | Eiji Sawa | Apparatus for mixing and injection molding thermosetting polyurethane |
-
2002
- 2002-02-01 FR FR0201214A patent/FR2835520B1/fr not_active Expired - Fee Related
-
2003
- 2003-01-16 US US10/345,207 patent/US6936120B1/en not_active Expired - Fee Related
- 2003-01-17 EP EP03290124A patent/EP1333016A3/fr not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2980373A1 (fr) * | 2011-09-26 | 2013-03-29 | Sme | Procede d'extraction de charges solubles contenues dans une pate |
| WO2013045804A1 (fr) | 2011-09-26 | 2013-04-04 | Herakles | Procede d'extraction de charges solides solubles contenues dans une pate. |
| US9393503B2 (en) | 2011-09-26 | 2016-07-19 | Herakles | Method for extracting solid soluble charges contained in a paste |
| FR3051134A1 (fr) * | 2016-05-12 | 2017-11-17 | Herakles | Installation destinee a la fabrication d'une composition polymerique chargee |
| RU2660101C1 (ru) * | 2017-07-14 | 2018-07-04 | Федеральное государственное унитарное предприятие "Федеральный центр двойных технологий "Союз" (ФГУП "ФЦДТ "Союз") | Способ изготовления заряда смесевого ракетного твердого топлива |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1333016A3 (fr) | 2010-10-13 |
| US6936120B1 (en) | 2005-08-30 |
| FR2835520A1 (fr) | 2003-08-08 |
| US20050183804A1 (en) | 2005-08-25 |
| FR2835520B1 (fr) | 2004-11-19 |
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