US3447980A - Castable explosive containing tnt and a reaction product of a diisocyanate and 1,4-butyleneoxide polyglycol - Google Patents
Castable explosive containing tnt and a reaction product of a diisocyanate and 1,4-butyleneoxide polyglycol Download PDFInfo
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- US3447980A US3447980A US610697A US3447980DA US3447980A US 3447980 A US3447980 A US 3447980A US 610697 A US610697 A US 610697A US 3447980D A US3447980D A US 3447980DA US 3447980 A US3447980 A US 3447980A
- Authority
- US
- United States
- Prior art keywords
- cast
- composition
- tnt
- diisocyanate
- reaction product
- 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.)
- Expired - Lifetime
Links
- 239000002360 explosive Substances 0.000 title description 23
- 239000007795 chemical reaction product Substances 0.000 title description 5
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 title description 4
- 229920000151 polyglycol Polymers 0.000 title description 4
- 239000010695 polyglycol Substances 0.000 title description 4
- 125000005442 diisocyanate group Chemical group 0.000 title description 2
- 239000000203 mixture Substances 0.000 description 22
- SPSSULHKWOKEEL-UHFFFAOYSA-N 2,4,6-trinitrotoluene Chemical compound CC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O SPSSULHKWOKEEL-UHFFFAOYSA-N 0.000 description 18
- 229920002635 polyurethane Polymers 0.000 description 13
- 239000004814 polyurethane Substances 0.000 description 13
- 239000000015 trinitrotoluene Substances 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 8
- 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 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 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 description 5
- 239000003921 oil Substances 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 239000004359 castor oil Substances 0.000 description 4
- 235000019438 castor oil Nutrition 0.000 description 4
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- BXRHLYQHDOWBDJ-UHFFFAOYSA-N [3-nitrooxy-2,2-bis(nitrooxymethyl)propyl] prop-2-enoate Chemical compound [O-][N+](=O)OCC(CO[N+]([O-])=O)(CO[N+]([O-])=O)COC(=O)C=C BXRHLYQHDOWBDJ-UHFFFAOYSA-N 0.000 description 3
- BRBAEHHXGZRCBK-UHFFFAOYSA-N pentrinitrol Chemical compound [O-][N+](=O)OCC(CO)(CO[N+]([O-])=O)CO[N+]([O-])=O BRBAEHHXGZRCBK-UHFFFAOYSA-N 0.000 description 3
- 229950006286 pentrinitrol Drugs 0.000 description 3
- 229920005862 polyol Polymers 0.000 description 3
- 150000003077 polyols Chemical class 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- 241000406799 Deto Species 0.000 description 1
- AGUIVNYEYSCPNI-UHFFFAOYSA-N N-methyl-N-picrylnitramine Chemical group [O-][N+](=O)N(C)C1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O AGUIVNYEYSCPNI-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000001540 azides Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
Definitions
- This invention relates to a castable high explosive of the type based on 2,4,6-trinitrotoluene or some analogous melt medium such as pentaerythritol acrylate trinitrate.
- castable high explosives are not only required in the manufacture of large caliber shells but are also preferred in the manufacture of other type shells due to simplicity in handling, safety achieved in loading, and overall cost in manufacture.
- the subject invention essentially eliminates the aforesaid disadvantages which are inherent in the manufacture of cast explosives by treating such explosives during manufacture with a mild, two-component, liquid polyurethaneproducing system.
- Another object is to provide an improved high explosive cast which, as a result of its composition, exhibits a higher degree of impact strength and a lesser degree of brittleness 55 when compared to similar explosives of the art.
- the polyurethane-producing system consists of a liquid polymeric diisocyanate prepolymer, such as the reaction product of 2,4-tolylene diisocyanate and 1,4butylene oxide polyglycol, accompanied by a suitable curing agent such as a liquid polyol or melta'ble hydrogenated castor oil.
- the polyurethane producing system should be present together in an amount between about 4 to 45 percent by weight of the total composition including the high explosive component. If the high explosive is present in an amount below percent, there would be a major decrease in explosive power and the entire composition, under normal initiation procedures, would merely defiagrate rather than explode. However, if the explosive is present in an amount greater than about percent, the mechanical strength of the composition would be proportionately decreased as the polyurethane content is reduced.
- the curing agent component i.e. hydrogenated castor oil, for eifective activity should be present in a ratio of about 1 part curing agent to 2 parts of the prepolymer component of the polyurethane system. Therefore, in the range above, the curing agent would be present in an amount between 1.7 to 15 percent by weight of weight of the total composition.
- the polyurethane producing system would then represent about 3.3 to 30 percent by weight of such composition.
- the liquid trinitrotoluene and the liquid polyurethane producing system may form two separate layers. A mild agitation of these components by means of a paddle will bring them into a blended mixture. However, to aid this process, a melt compatibilizer such as poly-alpha-methylstyrene may be added which will facilitate the miscibility of the admixture.
- This type material represents a low molecular weight, liquid, polymeric material and results have shown, it only need be present in an amount up to that of the curing agent in the admixture to facilitate miscibility of the components.
- Compatibilizer Vacuum Stability 5 at Crystallinity on solidification mls.
- 0-2mls 0-2 Inls Amorphous or micro- Amorphous or micro- Amorphous or microcrystalline. crystalline. crystalline. Light Yellow Light Yellow Light Yellow. 5.5 7 0 9,
- the explosive composition incorporating the polyurethane producing system is highly stable, free of cracks and evidence of exudation, and substantially less brittle than the explosive composition which served as a control. Further, the treated explosive is firmly bonded to the containers While the control is only negligibly bonded and, as heretofore stated, the latter actions leads to independent spinning of the cast when fired.
- a castable high explosive which is equivalent to TNT in this composition is pentaerythritol acrylate trinitrate also known as petrin acrylate.
- the latter explosive also exhibits exudation prior to treatment due to the incorporation of low melting plasticizers.
- the TNT or petrin acrylate in the composition may be replaced with up to 80 percent by weight of cyclotrimethylene trinitramine, also known as RDX, or cyclotetramethylene tetranitramine which is conventionally known as HMX.
- RDX cyclotrimethylene trinitramine
- HMX cyclotetramethylene tetranitramine
- composition of claim 1 wherein cyclotrimethylene trinitramine is substituted for up to 80 percent of the base weight of TNT in said composition.
- composition of claim 3 wherein cyclotetramethylene tetranitramine is substituted for up to 80 percent of the base weight of TNT in said composition.
- composition of claim 1 wherein said reaction TABLE II Composition Control A B C 18. 4 36. 8 55. 2 73. 6 55. 2 36. 8 Prepolymer 4 4 4 Polyol Curing Agent... 2 2 2 Melt Compatibilizer 2 2 2 Characterization: Rate of deto tor, meters per second. 6, 640 6, 800 7, 300 7, 600 7, 900 7, 900 Cast density, g./cc 1. 56 1. 60 1. 03 .65 1. 67 1. 72 200 g. Bomb Brisance, sand crushed, g.: Detonator ehg. wt., 0.2 gm. azide, 0.1 gm. tetryl 48. 0 50 51 52 54. 6 54. 6 hr.
- Vacuum stability 120 C., 5 gms., ml. gas.-- 0.20 1.0 1.0 0.7 0.3 Explosion temp., 5 secs. C. (to decomposition) 475 400 300 300 275 280 Impact Sensitivity, 2 kg. wt. ht. in inches (.017
- composition of claim 4 wherein said reaction product is accompanied by poly-methyl styrene.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- Molecular Biology (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
Description
United States Patent 3,447 980 CASTABLE EXPLOSIVE CONTAINING TNT AND A REACTION PRODUCT OF A DIISOCYANATE AND 1,4-BUTYLENEOXIDE POLYGLYCOL H. William Voigt, Jr., Stanhope, N.J., assignor to the United States of America as represented by the Secretary of the Army No Drawing. Filed Jan. 20, 1967, Ser. No. 610,697 Int. Cl. C06b 9/04 US. Cl. 149-19 Claims ABSTRACT OF THE DISCLOSURE A polyurethane modified castable high explosive, such as TNT or Petrin Acrylate, whose solidified cast is essentially free of voids, cavities, or exuding oils.
This invention relates to a castable high explosive of the type based on 2,4,6-trinitrotoluene or some analogous melt medium such as pentaerythritol acrylate trinitrate.
As is well known, castable high explosives are not only required in the manufacture of large caliber shells but are also preferred in the manufacture of other type shells due to simplicity in handling, safety achieved in loading, and overall cost in manufacture.
In the past, characteristics such as exudation, cavitation, brittleness, and irreversible expansion were noted in the preparation of a castable high explosive such as 2,4,6 trinitrotoluene. In the case of exudation, the low melting oils usually appear when the cast is stored around 71 C. but may appear even at room temperature. This leads to cavitation and independent spinning of the cast when the shell is fired from a rifled barrel. Also, the physical nature of the cast is usually brittle, particularly at the low temperatures required of military use, and cracking occurs when the cast is cycled from differing zones of temperature. The latter condition ultimately affects the impact sensitivity of the cast. Further, the coefficient of thermal expansion of this type castable explosive is high and irreversible expansion of the cast occurs when heated. This facilitates the formation of voids which also adversely'infiuences the impact sensitivity of the final cast.
The subject invention essentially eliminates the aforesaid disadvantages which are inherent in the manufacture of cast explosives by treating such explosives during manufacture with a mild, two-component, liquid polyurethaneproducing system.
It is therefore an object of this invention to provide a polyurethane modified castable high explosive whose solidified cast is essentially free of voids, cavities, or exuding oils.
Another object is to provide an improved high explosive cast which, as a result of its composition, exhibits a higher degree of impact strength and a lesser degree of brittleness 55 when compared to similar explosives of the art.
3,447,980 Patented June 3, 1969 Other objects and many of the attendant advantages of this invention will be readily appreciated as the same becomes better understood by reference to the following detailed description.
It has been found that a selected polyurethane elastomeric system may be so-melted as homogeneous liquids with 2,4,6-trinitrotoluene to achieve the advantages described above. The polyurethane-producing system consists of a liquid polymeric diisocyanate prepolymer, such as the reaction product of 2,4-tolylene diisocyanate and 1,4butylene oxide polyglycol, accompanied by a suitable curing agent such as a liquid polyol or melta'ble hydrogenated castor oil. In theory, it is possible that strong hydrogen bonding of the -NH groups of the urethane system occurs with the available oxygen of the trinitrololuene or pentaerythritol acrylate trinitrate molecule, resulting in the advantages described above. The aforementioned polyurethane-producing system is selected from many other similar systems because it is essentially non-reactive with 2,4,6-trinitrotoluene as determined by the standard 120 C. vacuum stability test of the final cast product.
The polyurethane producing system should be present together in an amount between about 4 to 45 percent by weight of the total composition including the high explosive component. If the high explosive is present in an amount below percent, there would be a major decrease in explosive power and the entire composition, under normal initiation procedures, would merely defiagrate rather than explode. However, if the explosive is present in an amount greater than about percent, the mechanical strength of the composition would be proportionately decreased as the polyurethane content is reduced.
The curing agent component, i.e. hydrogenated castor oil, for eifective activity should be present in a ratio of about 1 part curing agent to 2 parts of the prepolymer component of the polyurethane system. Therefore, in the range above, the curing agent would be present in an amount between 1.7 to 15 percent by weight of weight of the total composition. The polyurethane producing system would then represent about 3.3 to 30 percent by weight of such composition.
During preparation, the liquid trinitrotoluene and the liquid polyurethane producing system may form two separate layers. A mild agitation of these components by means of a paddle will bring them into a blended mixture. However, to aid this process, a melt compatibilizer such as poly-alpha-methylstyrene may be added which will facilitate the miscibility of the admixture. This type material represents a low molecular weight, liquid, polymeric material and results have shown, it only need be present in an amount up to that of the curing agent in the admixture to facilitate miscibility of the components.
The data set forth in Table I below will illustrate the etfectiveness of this invention.
TABLE I Composition Control A B C Percent by weight:
TNT Urethane prepolymer Curing Agent.
Compatibilizer Vacuum Stability: 5 at Crystallinity on solidification mls.
0-2mls 0-2 Inls Amorphous or micro- Amorphous or micro- Amorphous or microcrystalline. crystalline. crystalline. Light Yellow Light Yellow Light Yellow. 5.5 7 0 9,
Firm. None.
100. Non-Brittle.
As may be seen from the above cited data, the explosive composition incorporating the polyurethane producing system is highly stable, free of cracks and evidence of exudation, and substantially less brittle than the explosive composition which served as a control. Further, the treated explosive is firmly bonded to the containers While the control is only negligibly bonded and, as heretofore stated, the latter actions leads to independent spinning of the cast when fired.
A castable high explosive which is equivalent to TNT in this composition is pentaerythritol acrylate trinitrate also known as petrin acrylate. The latter explosive also exhibits exudation prior to treatment due to the incorporation of low melting plasticizers. Further, the TNT or petrin acrylate in the composition may be replaced with up to 80 percent by weight of cyclotrimethylene trinitramine, also known as RDX, or cyclotetramethylene tetranitramine which is conventionally known as HMX. Such replacement will tend to upgrade the composition leading to a greater explosive power, a less likelihood that the TNT will melt out when stored at a high temperature or that the final cast will possess cracks.
The following examples will illustrate how efiective the replacement may be.
'4 tages with results similar to that obtained in Table H may be achieved, if the polyurethane modified TNT is replaced with up to 80% HMX.
Obviously, many modifications and variations are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as described.
I claim:
1. A composition of a high explosive cast which is free of voids, cavitations, and exudation of oils up to a temperature of 71 C. consisting of (a) 55 to 95 percent by weight of 2,4,6-trinitrotoluene,
and
(b) 5 to 45 percent by weight of the reaction product of 2,4-tolylene diisocyanate and 1,4-butylene oxide polyglycol.
2. The composition of claim 1 wherein cyclotrimethylene trinitramine is substituted for up to 80 percent of the base weight of TNT in said composition.
3. The composition of claim 1 wherein cyclotetramethylene tetranitramine is substituted for up to 80 percent of the base weight of TNT in said composition.
4. The composition of claim 1 wherein said reaction TABLE II Composition Control A B C 18. 4 36. 8 55. 2 73. 6 55. 2 36. 8 Prepolymer 4 4 4 Polyol Curing Agent... 2 2 2 Melt Compatibilizer 2 2 2 Characterization: Rate of deto tor, meters per second. 6, 640 6, 800 7, 300 7, 600 7, 900 7, 900 Cast density, g./cc 1. 56 1. 60 1. 03 .65 1. 67 1. 72 200 g. Bomb Brisance, sand crushed, g.: Detonator ehg. wt., 0.2 gm. azide, 0.1 gm. tetryl 48. 0 50 51 52 54. 6 54. 6 hr. Vacuum stability, 120 C., 5 gms., ml. gas.-- 0.20 1.0 1.0 1.0 0.7 0.3 Explosion temp., 5 secs. C. (to decomposition) 475 400 300 300 275 280 Impact Sensitivity, 2 kg. wt. ht. in inches (.017
mg. in confined cup) 14 17 17 17 17 14 Hardness, Shore D 1 45 K 45 Brittleness, falling ball, V lb. steel ball, approx.
height to cause fracture, inches... 2 8 8 8 8 2 Remarks: Melt Pouring temp., C 85 85 85 85 85 Curing temperature Physical properties Exeuding in shell, 71 C Yes None None None None Yes Temperature cycling, 40 C. to +71 C Suspension or Settling out of RDX or HMX filler in melt phase (0 Temperature of melting-out of TNT, C 80 105 80 1 Brittle. I N/a. 3 Room temperature 71 C. 4 Non-brittle. Elastomeric. Cracks develop. 7 No cracks. 8 Suspension. 9 Settling out.
In Table II above, 20 to 80% of the polyurethane modilied TNT is replaced with RDX. As indicated, the rate of detonation, cast density, hardness and brisance are increased as the amount of RDX is increased in the composition. Also, the vacuum stability is negligibly afiected while the impact sensitivity is only slightly increased. Further, the physical properties of the case are such that the cast may be characterized as non-brittle while the control, which is unmodified, is quite brittle. In any case, the unmodified casts exude oils While there is no evidence of this type activity in the modified samples. Thus, the modified samples are not liable to cavitation and independent spinning of the cast when fired. Further, no cracks are evident in the modified samples when cycled from -40 to 71 C. which means that the impact sensitivity of the cast will not be afiected. As is apparent from the above, the replacement of TNT with RDX is accompanied by many advantages. However, similar advanproduct is accompanied by a polyol curing agent selected from the group consisting of castor oil and hydrogenated castor oil.
5. The composition of claim 4 wherein said reaction product is accompanied by poly-methyl styrene.
References Cited UNITED STATES PATENTS 3,049,454 8/ 1962 Stark 149-92 3,141,294 7/ 1964 Lawrence et a1 14919 3,238,245 3/ 1966 Reedy 149-93 X 3,309,247 3/1967 Bluhn 149-19 X 3,350,245 10/1967 Dickinson 14919 BENJAMIN R. PADGETT, Primary Examiner.
US. Cl. X.R.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US61069767A | 1967-01-20 | 1967-01-20 |
Publications (1)
Publication Number | Publication Date |
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US3447980A true US3447980A (en) | 1969-06-03 |
Family
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Application Number | Title | Priority Date | Filing Date |
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US610697A Expired - Lifetime US3447980A (en) | 1967-01-20 | 1967-01-20 | Castable explosive containing tnt and a reaction product of a diisocyanate and 1,4-butyleneoxide polyglycol |
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US (1) | US3447980A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4919010A (en) * | 1972-03-20 | 1974-02-20 | ||
US4000021A (en) * | 1975-08-22 | 1976-12-28 | The United States Of America As Represented By The Secretary Of The Army | Process for suspending particulate additives in molten TNT |
US4012245A (en) * | 1974-05-31 | 1977-03-15 | The United States Of America As Represented By The Secretary Of The Army | Cast TNT explosive containing polyurethane elastomer which is free from oily exudation and voids and uniformly remeltable |
US4021514A (en) * | 1974-06-21 | 1977-05-03 | Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag | Method for the production of an inhibitor coating for a solid rocket propellent charge |
US4034676A (en) * | 1974-06-21 | 1977-07-12 | Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag | Inhibitor coating for solid rocket propellent charge |
US4050968A (en) * | 1970-04-29 | 1977-09-27 | The United States Of America As Represented By The Secretary Of The Navy | Explosive composition containing a hydroxyalkyl acrylate copolymer binder |
US4052943A (en) * | 1976-09-16 | 1977-10-11 | The United States Of America As Represented By The Secretary Of The Navy | Coating composition and method for improving propellant tear strength |
US4284442A (en) * | 1978-03-13 | 1981-08-18 | The United States Of America As Represented By The Secretary Of The Army | Castable TNT compositions containing a broad spectrum preformed thermoplastic polyurethane elastomer additive |
US4325759A (en) * | 1979-12-17 | 1982-04-20 | The United States Of America As Represented By The Secretary Of The Army | Preparation of TNT-thermoplastic polymer granules readily soluble in a TNT melt |
US4938143A (en) * | 1987-04-29 | 1990-07-03 | Trojan Corporation | Booster shaped for high-efficiency detonating |
EP0430462A2 (en) * | 1989-11-15 | 1991-06-05 | EXPLOSIVE RESEARCH & DEVELOPMENT CORPORATION | Improved melt cast explosives |
CN110156544A (en) * | 2019-05-28 | 2019-08-23 | 湖北东神楚天化工有限公司 | A kind of mining emulsion in underground and preparation method thereof |
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US3141294A (en) * | 1960-05-31 | 1964-07-21 | Aerojet General Co | Propulsion method employing resonance suppressor |
US3238245A (en) * | 1959-09-08 | 1966-03-01 | Du Pont | Preparation of pentaerythritol trinitrate acrylate |
US3309247A (en) * | 1962-09-17 | 1967-03-14 | Atlas Chem Ind | Ammonium nitrate explosive with polyurethane resin prepared from nitric acid partial esters |
US3350245A (en) * | 1959-09-09 | 1967-10-31 | Dickinson Lionel Arthur | Composite polyether propellants |
-
1967
- 1967-01-20 US US610697A patent/US3447980A/en not_active Expired - Lifetime
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US3049454A (en) * | 1955-08-15 | 1962-08-14 | Howard J Stark | Low density cellular explosive foam |
US3238245A (en) * | 1959-09-08 | 1966-03-01 | Du Pont | Preparation of pentaerythritol trinitrate acrylate |
US3350245A (en) * | 1959-09-09 | 1967-10-31 | Dickinson Lionel Arthur | Composite polyether propellants |
US3141294A (en) * | 1960-05-31 | 1964-07-21 | Aerojet General Co | Propulsion method employing resonance suppressor |
US3309247A (en) * | 1962-09-17 | 1967-03-14 | Atlas Chem Ind | Ammonium nitrate explosive with polyurethane resin prepared from nitric acid partial esters |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4050968A (en) * | 1970-04-29 | 1977-09-27 | The United States Of America As Represented By The Secretary Of The Navy | Explosive composition containing a hydroxyalkyl acrylate copolymer binder |
JPS4919010A (en) * | 1972-03-20 | 1974-02-20 | ||
US3888707A (en) * | 1972-03-20 | 1975-06-10 | Us Navy | Flexible, self-supporting explosive composition |
US4012245A (en) * | 1974-05-31 | 1977-03-15 | The United States Of America As Represented By The Secretary Of The Army | Cast TNT explosive containing polyurethane elastomer which is free from oily exudation and voids and uniformly remeltable |
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US4034676A (en) * | 1974-06-21 | 1977-07-12 | Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag | Inhibitor coating for solid rocket propellent charge |
US4000021A (en) * | 1975-08-22 | 1976-12-28 | The United States Of America As Represented By The Secretary Of The Army | Process for suspending particulate additives in molten TNT |
US4052943A (en) * | 1976-09-16 | 1977-10-11 | The United States Of America As Represented By The Secretary Of The Navy | Coating composition and method for improving propellant tear strength |
US4284442A (en) * | 1978-03-13 | 1981-08-18 | The United States Of America As Represented By The Secretary Of The Army | Castable TNT compositions containing a broad spectrum preformed thermoplastic polyurethane elastomer additive |
US4325759A (en) * | 1979-12-17 | 1982-04-20 | The United States Of America As Represented By The Secretary Of The Army | Preparation of TNT-thermoplastic polymer granules readily soluble in a TNT melt |
US4938143A (en) * | 1987-04-29 | 1990-07-03 | Trojan Corporation | Booster shaped for high-efficiency detonating |
EP0430462A2 (en) * | 1989-11-15 | 1991-06-05 | EXPLOSIVE RESEARCH & DEVELOPMENT CORPORATION | Improved melt cast explosives |
EP0430462A3 (en) * | 1989-11-15 | 1992-12-02 | Explosive Research & Development Corporation | Improved melt cast explosives |
CN110156544A (en) * | 2019-05-28 | 2019-08-23 | 湖北东神楚天化工有限公司 | A kind of mining emulsion in underground and preparation method thereof |
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