US3024144A - Solid composite propellants containing diamine dinitrates - Google Patents
Solid composite propellants containing diamine dinitrates Download PDFInfo
- Publication number
- US3024144A US3024144A US783617A US78361758A US3024144A US 3024144 A US3024144 A US 3024144A US 783617 A US783617 A US 783617A US 78361758 A US78361758 A US 78361758A US 3024144 A US3024144 A US 3024144A
- Authority
- US
- United States
- Prior art keywords
- dinitrate
- propellant
- parts
- oxidizer
- weight
- 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
- 239000003380 propellant Substances 0.000 title claims description 68
- 150000004985 diamines Chemical class 0.000 title description 25
- 239000002131 composite material Substances 0.000 title description 8
- 239000007787 solid Substances 0.000 title description 7
- 239000000203 mixture Substances 0.000 claims description 62
- 239000007800 oxidant agent Substances 0.000 claims description 33
- 239000011230 binding agent Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 20
- GDDNTTHUKVNJRA-UHFFFAOYSA-N 3-bromo-3,3-difluoroprop-1-ene Chemical compound FC(F)(Br)C=C GDDNTTHUKVNJRA-UHFFFAOYSA-N 0.000 claims description 13
- 244000043261 Hevea brasiliensis Species 0.000 claims description 6
- 229920003052 natural elastomer Polymers 0.000 claims description 6
- 229920001194 natural rubber Polymers 0.000 claims description 6
- 229910001485 alkali metal perchlorate Inorganic materials 0.000 claims description 5
- 229920003051 synthetic elastomer Polymers 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 description 26
- 229920001577 copolymer Polymers 0.000 description 24
- 239000002585 base Substances 0.000 description 23
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 229910052757 nitrogen Inorganic materials 0.000 description 17
- 239000005060 rubber Substances 0.000 description 17
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 description 16
- 150000001993 dienes Chemical class 0.000 description 15
- 125000004432 carbon atom Chemical group C* 0.000 description 14
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 12
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 12
- 239000004615 ingredient Substances 0.000 description 12
- 125000000217 alkyl group Chemical group 0.000 description 10
- -1 amine nitrates Chemical class 0.000 description 10
- 125000000623 heterocyclic group Chemical group 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000004449 solid propellant Substances 0.000 description 10
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 9
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 8
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 7
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 7
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 7
- 150000001412 amines Chemical class 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- NWEMGSVSTURVTK-UHFFFAOYSA-N [N+](=O)(O)[O-].[N+](=O)(O)[O-].CN(CCC(C)N(C)C)C Chemical compound [N+](=O)(O)[O-].[N+](=O)(O)[O-].CN(CCC(C)N(C)C)C NWEMGSVSTURVTK-UHFFFAOYSA-N 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000005062 Polybutadiene Substances 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 4
- 239000006229 carbon black Substances 0.000 description 4
- 230000000881 depressing effect Effects 0.000 description 4
- 238000007720 emulsion polymerization reaction Methods 0.000 description 4
- 239000004014 plasticizer Substances 0.000 description 4
- 229920002857 polybutadiene Polymers 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
- 241001441571 Hiodontidae Species 0.000 description 3
- 239000004594 Masterbatch (MB) Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000012662 bulk polymerization Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 150000003222 pyridines Chemical class 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- 239000000080 wetting agent Substances 0.000 description 3
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 2
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-vinylpyridine Chemical compound C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-UHFFFAOYSA-N 0.000 description 2
- UXKQNCDDHDBAPD-UHFFFAOYSA-N 4-n,4-n-diphenylbenzene-1,4-diamine Chemical compound C1=CC(N)=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 UXKQNCDDHDBAPD-UHFFFAOYSA-N 0.000 description 2
- VJOWMORERYNYON-UHFFFAOYSA-N 5-ethenyl-2-methylpyridine Chemical compound CC1=CC=C(C=C)C=N1 VJOWMORERYNYON-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- KEQFTVQCIQJIQW-UHFFFAOYSA-N N-Phenyl-2-naphthylamine Chemical compound C=1C=C2C=CC=CC2=CC=1NC1=CC=CC=C1 KEQFTVQCIQJIQW-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 239000000020 Nitrocellulose Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000004450 alkenylene group Chemical group 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 125000002947 alkylene group Chemical group 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- DIKBFYAXUHHXCS-UHFFFAOYSA-N bromoform Chemical compound BrC(Br)Br DIKBFYAXUHHXCS-UHFFFAOYSA-N 0.000 description 2
- GZUXJHMPEANEGY-UHFFFAOYSA-N bromomethane Chemical compound BrC GZUXJHMPEANEGY-UHFFFAOYSA-N 0.000 description 2
- 125000004093 cyano group Chemical group *C#N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- WCYWZMWISLQXQU-UHFFFAOYSA-N methyl Chemical compound [CH3] WCYWZMWISLQXQU-UHFFFAOYSA-N 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000006069 physical mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005956 quaternization reaction Methods 0.000 description 2
- 150000003248 quinolines Chemical class 0.000 description 2
- 239000012744 reinforcing agent Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical compound [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 2
- XFNJVJPLKCPIBV-UHFFFAOYSA-N trimethylenediamine Chemical group NCCCN XFNJVJPLKCPIBV-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- XEMRAKSQROQPBR-UHFFFAOYSA-N (trichloromethyl)benzene Chemical compound ClC(Cl)(Cl)C1=CC=CC=C1 XEMRAKSQROQPBR-UHFFFAOYSA-N 0.000 description 1
- HOHVUOKYQMRVDO-UHFFFAOYSA-N 1,2,4,5-tetrachloro-3-(dichloromethyl)-6-methylbenzene Chemical group CC1=C(Cl)C(Cl)=C(C(Cl)Cl)C(Cl)=C1Cl HOHVUOKYQMRVDO-UHFFFAOYSA-N 0.000 description 1
- PAAZPARNPHGIKF-UHFFFAOYSA-N 1,2-dibromoethane Chemical compound BrCCBr PAAZPARNPHGIKF-UHFFFAOYSA-N 0.000 description 1
- IIZPXYDJLKNOIY-JXPKJXOSSA-N 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC IIZPXYDJLKNOIY-JXPKJXOSSA-N 0.000 description 1
- 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 1
- JJVHEIJBQGMBKG-UHFFFAOYSA-N 2-ethenyl-3,4,5,6-tetramethylpyridine Chemical compound CC1=NC(C=C)=C(C)C(C)=C1C JJVHEIJBQGMBKG-UHFFFAOYSA-N 0.000 description 1
- TUPJXKPXLGTGTO-UHFFFAOYSA-N 2-ethenyl-4-ethylquinoline Chemical compound C1=CC=C2C(CC)=CC(C=C)=NC2=C1 TUPJXKPXLGTGTO-UHFFFAOYSA-N 0.000 description 1
- YQUDMNIUBTXLSX-UHFFFAOYSA-N 2-ethenyl-5-ethylpyridine Chemical compound CCC1=CC=C(C=C)N=C1 YQUDMNIUBTXLSX-UHFFFAOYSA-N 0.000 description 1
- ASKLBJFSWQWZFU-UHFFFAOYSA-N 2-ethenyl-6-ethoxy-7-methylquinoline Chemical compound C1=C(C=C)N=C2C=C(C)C(OCC)=CC2=C1 ASKLBJFSWQWZFU-UHFFFAOYSA-N 0.000 description 1
- XUGNJOCQALIQFG-UHFFFAOYSA-N 2-ethenylquinoline Chemical compound C1=CC=CC2=NC(C=C)=CC=C21 XUGNJOCQALIQFG-UHFFFAOYSA-N 0.000 description 1
- ZSMOKNZAUSNOIG-UHFFFAOYSA-N 2-ethoxy-3-ethylhexa-1,3-diene Chemical compound CCOC(=C)C(CC)=CCC ZSMOKNZAUSNOIG-UHFFFAOYSA-N 0.000 description 1
- JFBZAUXCIFXDGO-UHFFFAOYSA-N 2-methoxy-3-methylidenepent-1-ene Chemical compound CCC(=C)C(=C)OC JFBZAUXCIFXDGO-UHFFFAOYSA-N 0.000 description 1
- IKEHOXWJQXIQAG-UHFFFAOYSA-N 2-tert-butyl-4-methylphenol Chemical compound CC1=CC=C(O)C(C(C)(C)C)=C1 IKEHOXWJQXIQAG-UHFFFAOYSA-N 0.000 description 1
- ISRUHSKWYGWJIX-UHFFFAOYSA-N 3-ethenyl-2,4-dimethyl-5,6-dipentylpyridine Chemical compound CCCCCC1=NC(C)=C(C=C)C(C)=C1CCCCC ISRUHSKWYGWJIX-UHFFFAOYSA-N 0.000 description 1
- WXTOUDFBUYDQGP-UHFFFAOYSA-N 3-ethenyl-5-ethoxypyridine Chemical compound CCOC1=CN=CC(C=C)=C1 WXTOUDFBUYDQGP-UHFFFAOYSA-N 0.000 description 1
- KNWOTKCKGFQYRP-UHFFFAOYSA-N 3-ethenyl-5-ethylpyridine Chemical compound CCC1=CN=CC(C=C)=C1 KNWOTKCKGFQYRP-UHFFFAOYSA-N 0.000 description 1
- JDAPKVYHFNRFKO-UHFFFAOYSA-N 3-ethenyl-5-phenylpyridine Chemical compound C=CC1=CN=CC(C=2C=CC=CC=2)=C1 JDAPKVYHFNRFKO-UHFFFAOYSA-N 0.000 description 1
- XNNLTDRWOHXVDY-UHFFFAOYSA-N 3-ethenyl-6,7-dipropylquinoline Chemical compound C=CC1=CN=C2C=C(CCC)C(CCC)=CC2=C1 XNNLTDRWOHXVDY-UHFFFAOYSA-N 0.000 description 1
- VNTXUFLTYYQIPQ-UHFFFAOYSA-N 4,5-dichloro-2-ethenylpyridine Chemical compound C(=C)C1=NC=C(C(=C1)Cl)Cl VNTXUFLTYYQIPQ-UHFFFAOYSA-N 0.000 description 1
- VYIYXBONKWPJSH-UHFFFAOYSA-N 4-benzyl-2-ethenylquinoline Chemical compound C=12C=CC=CC2=NC(C=C)=CC=1CC1=CC=CC=C1 VYIYXBONKWPJSH-UHFFFAOYSA-N 0.000 description 1
- HQPQBUQHYITQAL-UHFFFAOYSA-N 4-chloro-2-ethenyl-6-methoxypyridine Chemical compound COC1=CC(Cl)=CC(C=C)=N1 HQPQBUQHYITQAL-UHFFFAOYSA-N 0.000 description 1
- ZVBVBFGGZJJWHR-UHFFFAOYSA-N 4-ethenyl-2,6-diethylpyridine Chemical compound CCC1=CC(C=C)=CC(CC)=N1 ZVBVBFGGZJJWHR-UHFFFAOYSA-N 0.000 description 1
- KFDVPJUYSDEJTH-UHFFFAOYSA-N 4-ethenylpyridine Chemical compound C=CC1=CC=NC=C1 KFDVPJUYSDEJTH-UHFFFAOYSA-N 0.000 description 1
- LENGLWMOXWJGOH-UHFFFAOYSA-N 5-ethenyl-2,3,4-trimethylpyridine Chemical compound CC1=NC=C(C=C)C(C)=C1C LENGLWMOXWJGOH-UHFFFAOYSA-N 0.000 description 1
- NTFOOQDZAMZVJD-UHFFFAOYSA-N 5-ethenyl-4-nonyl-2-propan-2-ylpyridine Chemical compound CCCCCCCCCC1=CC(C(C)C)=NC=C1C=C NTFOOQDZAMZVJD-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 239000004451 Ballistite Substances 0.000 description 1
- CAHQGWAXKLQREW-UHFFFAOYSA-N Benzal chloride Chemical compound ClC(Cl)C1=CC=CC=C1 CAHQGWAXKLQREW-UHFFFAOYSA-N 0.000 description 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- UTGQNNCQYDRXCH-UHFFFAOYSA-N N,N'-diphenyl-1,4-phenylenediamine Chemical compound C=1C=C(NC=2C=CC=CC=2)C=CC=1NC1=CC=CC=C1 UTGQNNCQYDRXCH-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- SNIOPGDIGTZGOP-UHFFFAOYSA-N Nitroglycerin Chemical compound [O-][N+](=O)OCC(O[N+]([O-])=O)CO[N+]([O-])=O SNIOPGDIGTZGOP-UHFFFAOYSA-N 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000005700 Putrescine Substances 0.000 description 1
- RQWYZVLGAFOAKD-UHFFFAOYSA-N [N+](=O)(O)[O-].[N+](=O)(O)[O-].CN(CCCN(C)C)C Chemical compound [N+](=O)(O)[O-].[N+](=O)(O)[O-].CN(CCCN(C)C)C RQWYZVLGAFOAKD-UHFFFAOYSA-N 0.000 description 1
- PDIOKWSXIIMYCJ-UHFFFAOYSA-I [O-]O.[O-]P([O-])(=O)OP(=O)([O-])[O-].[Fe+5] Chemical compound [O-]O.[O-]P([O-])(=O)OP(=O)([O-])[O-].[Fe+5] PDIOKWSXIIMYCJ-UHFFFAOYSA-I 0.000 description 1
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910001963 alkali metal nitrate Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000002877 alkyl aryl group Chemical group 0.000 description 1
- 150000001350 alkyl halides Chemical class 0.000 description 1
- 150000008051 alkyl sulfates Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 125000004104 aryloxy group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- PASDCCFISLVPSO-UHFFFAOYSA-N benzoyl chloride Chemical compound ClC(=O)C1=CC=CC=C1 PASDCCFISLVPSO-UHFFFAOYSA-N 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229950005228 bromoform Drugs 0.000 description 1
- XZKRXPZXQLARHH-UHFFFAOYSA-N buta-1,3-dienylbenzene Chemical compound C=CC=CC1=CC=CC=C1 XZKRXPZXQLARHH-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 description 1
- 235000019864 coconut oil Nutrition 0.000 description 1
- 239000003240 coconut oil Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- NZZFYRREKKOMAT-UHFFFAOYSA-N diiodomethane Chemical compound ICI NZZFYRREKKOMAT-UHFFFAOYSA-N 0.000 description 1
- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 description 1
- HRKQOINLCJTGBK-UHFFFAOYSA-L dioxidosulfate(2-) Chemical compound [O-]S[O-] HRKQOINLCJTGBK-UHFFFAOYSA-L 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012990 dithiocarbamate Substances 0.000 description 1
- 150000004659 dithiocarbamates Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 1
- 229960003711 glyceryl trinitrate Drugs 0.000 description 1
- 125000001188 haloalkyl group Chemical group 0.000 description 1
- 125000001475 halogen functional group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- JJQHTLAUSSTREE-UHFFFAOYSA-N hexane-3,3-diamine Chemical compound CCCC(N)(N)CC JJQHTLAUSSTREE-UHFFFAOYSA-N 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 125000005027 hydroxyaryl group Chemical group 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 description 1
- 150000002537 isoquinolines Chemical class 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000000787 lecithin Substances 0.000 description 1
- 229940067606 lecithin Drugs 0.000 description 1
- 235000010445 lecithin Nutrition 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- CZXGXYBOQYQXQD-UHFFFAOYSA-N methyl benzenesulfonate Chemical compound COS(=O)(=O)C1=CC=CC=C1 CZXGXYBOQYQXQD-UHFFFAOYSA-N 0.000 description 1
- 229940102396 methyl bromide Drugs 0.000 description 1
- JZMJDSHXVKJFKW-UHFFFAOYSA-M methyl sulfate(1-) Chemical compound COS([O-])(=O)=O JZMJDSHXVKJFKW-UHFFFAOYSA-M 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000010059 sulfur vulcanization Methods 0.000 description 1
- RZRJACCZWZTYJY-UHFFFAOYSA-N tert-butylsulfanyl n,n-dimethylcarbamodithioate Chemical compound CN(C)C(=S)SSC(C)(C)C RZRJACCZWZTYJY-UHFFFAOYSA-N 0.000 description 1
- 239000000015 trinitrotoluene Substances 0.000 description 1
- 239000003981 vehicle 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
-
- 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
- C06B25/34—Compositions containing a nitrated organic compound the compound being a nitrated acyclic, alicyclic or heterocyclic amine
Definitions
- This invention relates to solid propellant compositions.
- this invention relates to solid propellant compositions containing a burning rate depressing agent.
- this invention relates to incorporating certain selected diamine dinitrates in certain solid propellants.
- Solid propellants can be classified with respect to composition as double base type, single base type, and composite type.
- An example of a double base propellant is ballistite which comprises essentially nitroglycerine and nitrocellulose.
- Examples of single base propellants are nitrocellulose and trinitrotoluene.
- Composite type propellants are generally composed of an oxidizer, and a binder or fuel. Said composite type propellants may contain other materials to facilitate manufacture or increase ballistic performance such as a burning rate catalyst.
- Jet propulsion motors of the type in which the propellants of this invention are applicable can be employed to aid a heavily loaded plane in take off.
- Said motors can also be employed as an auxiliary to the conventional power plant when an extra surge of power is required.
- Said motors can also be employed to propel projectiles and land vehicles.
- Said propellants can also be used for uses other than propulsion. For example, they can be used as gas generators in starting devices, power units where a fluid is employed as a motive force, and other applications where a comparatively large volume of gas is required in a relatively short period of time.
- solid propellant materials comprising a solid oxidant such as ammonium nitrate or ammonium perchlorate, and a rubbery material such as a copolymerof butadiene and a vinylpyridiue or other substituted heterocyclic nitrogen base compound, which after incorporation is cured by a quaternization reaction or a vulcanization reaction.
- Solid propellant mixtures of this nature and a process for their production are disclosed and claimed in copending application Serial No. 284,447, filed April 25, 1952, by W. B. Reynolds and J. E. Pritchard.
- the present invention resides in propellant compositions comprising a perchlorate oxidizer component, a binder component, and a selected diamine dinitrate as defined further hereinafter.
- a propellant composition comprised of: a base propellant comprising an oxidizer component selected from the group consisting of ammonium perchlorate and the alkali metal perchlorates, a binder component comprising av rubbery material selected from the group consisting of natural rubber and synthetic rubbery polymers and mixtures thereof; and from 0.1 to 20 parts by weight per parts by weight of said base propellant of a diamine dinitrate characterized by the structural formula at t/ A k R N0 N0 R wherein: R is an alkylene or alkenylene group containing from 2 to 14 carbon atoms; R is an alkyl group containing from'l to 4 carbon atoms, Which alkyl groups can be alike and unlike; and wherein the total number of carbon atoms in the molecule does not exceed 18.
- Said diamine dinitrates are elfective at low concentrations, are compatible with other propellant ingredients, are stable under the conditions of use, and do not leave any undesirable residue upon burning.
- the action of said diamine dinitrates in depressing the burning rate is believed to be unique for said perchlorate containing proellants.
- copending application Serial No. 735,907 filed May 16, 1958, of which I am a coinventor, it is disclosed and claimed that many of the above defined diamine dinitrates increase the burning rate of composite type propellants containing ammonium nitrate and/ or an alkali metal nitrate as the oxidizer component.
- said diamine dinitrates in said copending application also serve as a processing aid in that they facilitate mixing and increase the extrudability of high oxidizer content nitrate containing propellants. Qualitative tests have shown that the above defined diamine dinitrates do not facilitate the processing of perchlorate containing propellants.
- diamine dinitrates which can be used in the practice of the invention include, among others, the following:
- the amine nitrates employed in the practice of the invention can be prepared by several methods.
- One method is to react a suitable amine with nitric acid.
- Another method which can be employed is to form a salt of the amine such as a hydrochloride or an acetate, and then react the amine salt with nitric acid.
- the quantity of the diamine dinitrate employed can be in the range of about 0.1 to about 20 parts by weight per 100 parts by weight of the base propellant. Usually, amounts in the range of 0.1 to 10 parts by weight per 100 parts by weight of base propellant are preferred, and amounts in the range of 0.2 to parts are more preferred.
- base propellant is defined as the binder component plus the oxidant component.
- the rubbery material employed in the binder component of the propellant compositions of the invention can be a natural rubber, a synthetic rubbery polymer, or a mixture of natural rubber and said rubbery polymer.
- rubbery polymer as used herein and in the claims, unless otherwise specified, is defined as including all rubbery polymers of olefins and diolefins which are prepared by either mass or emulsion polymerization.
- suitable rubbery polymers are polybutadiene, polyisobutylene, polyisoprcne, copolymers of isobutylene and isoprene, copolymers of conjugated dienes with comonomers such as styrene, and copolymers of conjugated dienes with polymerizable heterocyclic nitrogen bases.
- Said copolymers of conjugated dienes with polymerizable heterocyclic bases comprise a preferred class of rubbery polymers for use in the binder component of the propellants of the invention.
- a presently preferred rubbery polymer is a copolymer of 1,3-butadiene with 2-methyl-5-vinyl- 2-vinylpyridine;
- Said preferred class of rubbery polymers prepared by copolymerizing a conjugated diene with a heterocyclic nitrogen base can vary in consistency from very soft rubbers, i.e., materials which are soft at room temperature but will show retraction when relaxed, to those having a Mooney value (ML-4 212 F.) up to 100.
- the rubbery copolymers most frequently preferred have Mooney values in'the range between 5 and 50. They may be prepared by any polymerization methods known to the art, e.g., mass or emulsion polymerization. One convenient method for preparing these copolymers is by emulsion polymerization at temperatures in the range between 0 and 140 F.
- the conjugated dienes employed are those containing from 4 to carbon atoms per molecule and include 1,3- butadiene, isoprene,, 2-methyl-1,3-butadiene, and the like. Various alkoxy, such as methoxy and ethoxy and cyano derivatives of these conjugated dienes, are also applicable.
- Other dienes such as phenylbutadiene; 2,3-dimethyl-l,3- hexadiene; 2-methoxy-3-ethylbutadiene; 2-ethoxy-3-ethyl- 1,3-hexadiene; 2-cyano-l,3-butadiene are also applicable.
- conjugated diene instead of using a single conjugated diene, a mixture of conjugated dienes can be employed. Thus, a mixture of 1,3-butadiene and isoprene can be employed as the conjugated diene portion of the monomer system.
- R is either hydrogen or a methyl group. That is, the substituent is either a vinyl or an alpha-methylvinyl (isopropenyl) group.
- the compounds of the pyridine series are of the greatest interest commercially at present.
- R is selected from the group consisting of hydrogen, alkyl, vinyl, alpha-methylvinyl, alkoxy, halo, hydroxy, cyano, aryloxy, aryl, and combinations of these groups such as haloalkyl, alkylaryl, hydroxyaryl, and the like; one and only one of said groups being selected from the group consisting of vinyl and alpha-methylvinyl; and the total number of carbon atoms in the nuclear substituted groups being not greater than 15. Examples of such compounds are 2-vinylpyridine;
- Another rubbery polymer which can be employed in the binder of the solid propellant composition of this invention is a copolymer of 1,3-butadiene with styrene.
- Such copolymers are commonly known in the art as GR-S rubbers.
- Said GR-S rubbers can be prepared by any of the well known methods employing well known recipes. Any of the well known GR-S rubbers containing from 1 to 2 and up to about 25 parts of styrene can be used in the practice of the invention.
- the GR-S rubber designated at 1505 is one preferred copolymer for use in the practice of theinvention.
- GR-S 1505 can be prepared by copolymerizing 1,3-butadiene with styrene at 41 F. using a sugar free, iron activated, rosin-acid emulsified system.
- a charge weight ratio of butadiene to styrene is 90/10 and the polymerization is allowed to go to approximately 52 percent completion.
- the copolymer is then salt acid coagulated and usually has a mean raw Mooney value (ML-4) of about 40.
- Said copolymers usually have a bound styrene content of about 8 weight percent. Further details regarding the preparation of GR-S rubbers can be found in Industrial and Engineering Chemistry, 40, pages 769 to 777 (1948), and United States Patents 2,583,277; 2,595,892; 2,609,362; 2,614,100; 2,647,109; and 2,665,269.
- the binder contains rubbery polymers of the type hereinbefore described and, in addition, there can be present one or more reinforcing agents, plasticizers, wetting agents, and antioxidants.
- Other ingredients which are employed for sulfur vulcanization include a vulcanization accelerator, a vulcanizing agent, such as sulfur, and an accelerator activator, such as zinc oxide.
- the finished binder usually contains various compounding ingredients.
- binder is employed generically and includes various conventional compounding ingredients.
- the binder content of the base propellant composition will usually range from to 40 percent by weight. A commonly preferred range for said binder content is from 5 to 25 weight percent.
- the copolymer comprising a conjugated diene and a polymerizable heterocyclic nitrogen base can also be cured by a quaternization reaction by incorporating therein a quaternizing agent and subjecting the resulting mixture to quaternizing conditions of temperature.
- Suitable quaternizing agents include alkyl halides such as methyl iodide and methyl bromide; alkylene halides such as methylene iodide and ethylene bromide; substituted alkanes such as chloroform and bromoform; alkyl sulfates such as methyl sulfate; and various substituted arornatic compounds such as benzoyl chloride, methyl benzene sulfonate, benzo-trichloride, hexachloro-p-xylene, benzal chloride, and the like.
- the quaternizing temperature is usually in the range of 0 to 175 C., although temperatures outside this range can be used.
- a general formulation for the binder component of the propellant composition of the invention is as follows:
- Aerosol OT dioctyl ester of sodium sulfosuccinic acid
- lecithin a compound which is selected from the group consisting of sulfosuccinic acid, lecithin, and Duomeen C diacetate (the diacetate of trimethylenediamine substituted by a coconut oil product) are among the materials which are applicable.
- Antioxidants which can be employed include Flexamine (physical mixture containing 65 percent of a complex diarylamine-ketone reaction product and 35 percent of N,N-diphenyl-p-phenylenediamine), phenyl betanaphthylamine, 2,2-methylene-bis(4-methyl-6-tert-butylphenol), and the like. Rubber antioxidants, in general, can be employed or, if desired, can be omitted.
- vulcanization accelerators are those of the carbamate type, such as N,N-dimethyl-S-tert-butylsulfenyl dithiocarbamate and Butyl-Eight.
- Butyl-Eight is a rubber accelerator of the dithiocarbamate type supplied by the R. F. Vanderbilt Company and described in Handbook of Material Trade Names by Zimmerman and Lavine, 1953 edition, as a brown liquid; specific gravity 1.01; partially soluble in water and gasoline; and soluble in acetone, alcohol, benzol, carbon disulfide and chloroform.
- each of the various types of compounding ingredients can be used singly or mixtures of various ingredients performing a certain function can be employed. It is sometimes preferred, for example, to use mixtures of plasticizers rather than a single material.
- Oxidizers which are applicable in the solid propellant compositions of the invention are ammonium perchlorate and the alkali metal perchlorates.
- alkali metal includes sodium, potassium, lithium, cesium, and rubidium.
- Ammonium perchlorate is the presently preferred oxidizer. Mixtures of said oxidizers are also applicable.
- the oxidizers are ground to a particle size preferably within the range between 20 and 200 microns average particle size. The most preferred particle size is from about 40 to about 60 microns.
- the amount of oxidizer used is a major amount of the total composition and is usually within the range of about 60 to about weight percent of the base propellant, i.e.,
- binder plus oxidizer A commonly preferred range for said oxidizer content is from 75 to 95 weight percent.
- Finely divided high energy additives can also be included in the propellant compositions of the invention.
- suitable high energy additives include, among others, the following: aluminum, boron, magnesium, iron, beryllium, lithium, alloys of aluminum, alloys of magnesium, and mixtures thereof. It is preferred that said finely divided high energy additives have a particle size less than 50 microns, more preferably less than 20 microns, and still more preferably, less than 10 microns.
- Said high energy additives can be used in amounts of from to weight percent of the base propellant. 'In some instances greater amounts can be used.
- the various ingredients in the propellant composition can be mixed on a roll mill or an internal mixer such as a Banbury or a Baker-Perkins dispersion blade mixer can be employed.
- the binder forms a continuous phase in the propellant with the oxidant as the discontinuous phase.
- One procedure for blending the propellant ingredients utilizes a stepwise addition of oxidizer ingredient.
- the binder ingredients are mixed to form a binder mixture and the oxidizer ingredient, having the diamine dinitrate dry blended therewith, is then added to said binder mixture in increments, usually 3 to 5, but fewer or more can be used.
- rocket grains can be formed by extrusion, compression molding, or injection molding, utilizing techniques known to those skilled in the art.
- the grain can be cured by heating.
- the curing temperature will generally be in the range between 70 and 250 F., preferably between 170 and 200 F.
- the curing time must be long enough to give required creep resistance and other mechanical properties in the propellant. The time will generally range from around three hours, when the higher curing temperatures are employed, to seven days when curing is effected at lower temperatures.
- the thus prepared rubber masterbatch was used to prepare a binder having the composition set forth in Table I below.
- Said binder was prepared by mixing said masterbatch and other ingredients in a Baker-Perkins mixer. Mixing was continued until a uniform binder composition was obtained.
- the liquid polybutadiene employed in said binder composition was prepared by mass polymerization using finely divided sodium as the catalyst. Said polybutadiene had the following properties:
- the uniform blends thus produced were extruded into strands having a diameter of inch. Said strands were cut into sections approximately seven inches in length. Said strand sections were restricted on all surfaces except on one end, so as to prevent burning except on said one end, and then cured for 24 hours at a temperature of approximately 180 F. preparatory to determining burning rates.
- the ammonium perchlorate used in the propellant compositions of Table II above was a 70-30 mixture of two finely ground products having a weight average particle size of 74 and 15 microns, respectively.
- Three additional propellant compositions were prepared as described above for propellants 1 and 2 except that the ammonium perchlorate oxidizer used was a 70-30 mixture of two finely ground products having a weight average particle size of 210 and 40 microns, respectively. Results of burning rate tests on said last mentioned three propellants are given in Table HI below.
- a propellant composition comprising from 60 to 95 weight percent of an oxidizer component selected from the group consisting of ammonium perchlorate and the alkali metal perchlorates, and from 5 to 40 weight percent of a binder component comprising a rubbery material selected from the group consisting of natural rubber and synthetic rubbery polymers; and from 1.0 to 20 parts by weight per 100 parts by weight of the total amount of said oxidizer component plus said binder component of a diamine dinitrate characterized by the structural formula i) n k R NO; NO; R
- R is selected from the group consisting of alkylene and alkenylene groups containing from 2 to 14 carbon atoms; R is an alkyl group containing from 1 to 4 carbon atoms, which alkyl groups can be alike and unlike; and wherein the total number of carbon atoms in the molecule does not exceed 18.
- a propellant composition according to claim 1 wherein said rubbery material is a copolymer prepared by copolymerizing a conjugated diene containing from 4 to carbon atoms with at least one substituted heterocyclic nitrogen base selected from the group consisting of pyridine, quinoline, alkyl substituted pyridine and alkyl substituted quinoline wherein the total number of carbon atoms in the nuclear alkyl substituents is not more than 15 and wherein R is selected from the group consisting of a hydrogen atom and a methyl radical.
- a propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N',N'-tetramethyl- 1,3-diaminobutane dinitrate.
- a propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N,N'-tetramethyl- 1,6-diaminohexane dinitrate.
- a propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N,N-tetramethyll,4-diamino-2,3-dimethylbutane dinitrate.
- a propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N,N'-tetramethyl- 1,3-diamino-2,2-dimethylpropane dinitrate.
- a propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N,N'-tetramethyl- 1,4-diaminobuta-ne dinitrate.
- a propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N,N'-tetraethyl- 1,3-diaminobutane dinitrate.
- a propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N,N'-tetramethyl- 1,3-diaminopropane dinitrate.
- a propellant composition according to claim 13 wherein said diamine dinitrate is N,N-dimethyl-N',N-diethyl-1,3-diaminobutane dinitrate.
- a propellent composition according to claim 14 wherein said copolymer is a copolymer of 1,3-butadiene with Z-methyl-S-vinylpyridine.
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Description
United States Patent 3,024,144 SOLID COMPOSITE PROPELLANTS CONTAINING DIAMINE DINITRATES George D. Sammons, Bartlesville, Okla, assignor to Phillips Petroleum Company, a corporation of Delaware No Drawing. Filed Dec. 29, 1958, Ser. No. 783,617 18 Claims. (Cl. 149-19) This invention relates to solid propellant compositions. In one aspect this invention relates to solid propellant compositions containing a burning rate depressing agent. In another aspect this invention relates to incorporating certain selected diamine dinitrates in certain solid propellants.
Solid propellants can be classified with respect to composition as double base type, single base type, and composite type. An example of a double base propellant is ballistite which comprises essentially nitroglycerine and nitrocellulose. Examples of single base propellants are nitrocellulose and trinitrotoluene. Composite type propellants are generally composed of an oxidizer, and a binder or fuel. Said composite type propellants may contain other materials to facilitate manufacture or increase ballistic performance such as a burning rate catalyst.
Rocket propellants have achieved considerable commercial importance as Well as military importance. Jet propulsion motors of the type in which the propellants of this invention are applicable can be employed to aid a heavily loaded plane in take off. Said motors can also be employed as an auxiliary to the conventional power plant when an extra surge of power is required. Said motors can also be employed to propel projectiles and land vehicles. Said propellants can also be used for uses other than propulsion. For example, they can be used as gas generators in starting devices, power units where a fluid is employed as a motive force, and other applications where a comparatively large volume of gas is required in a relatively short period of time.
Recently, it has been discovered that superior solid propellant materials are obtained comprising a solid oxidant such as ammonium nitrate or ammonium perchlorate, and a rubbery material such as a copolymerof butadiene and a vinylpyridiue or other substituted heterocyclic nitrogen base compound, which after incorporation is cured by a quaternization reaction or a vulcanization reaction. Solid propellant mixtures of this nature and a process for their production are disclosed and claimed in copending application Serial No. 284,447, filed April 25, 1952, by W. B. Reynolds and J. E. Pritchard.
In the utilization of solid composite type propellant compositions, it is important to control the burning rate and thus be able to control the amount of thrust developed per unit of time for a given charge of propellant. In many instances burning rate catalysts are utilized to increase the burning rate. However, with some oxidizers, e.g., ammonium perchlorate and the alkali metal perchlorates, it is desirable in many instances to depress the burning rate. Said perchlorate propellants have many desirable properties, particularly a high specific impulse, and frequently are satisfactory from every standpoint except burning rate.
I have discovered that the burning rate of composite type solid propellants wherein salts of perchloric acid are used as the oxidizer component can be decreased by incorporating in the propellant composition one or more diamine dinitrates as described herein.
Thus, broadly speaking, the present invention resides in propellant compositions comprising a perchlorate oxidizer component, a binder component, and a selected diamine dinitrate as defined further hereinafter.
An object of this invention is to provide an improved propellant composition. Another object of this invention is to provide a burning rate depressing agent for use in solid perchlorate containing propellants. Still another object of this invention is to provide a solid perchlorate containing propellant composition having a burning rate depressing agent incorporated therein. Other aspects, objects, and advantages of the invention will be apparent to those skilled in the art in view of this disclosure.
Thus, according to the invention there is provided a propellant composition comprised of: a base propellant comprising an oxidizer component selected from the group consisting of ammonium perchlorate and the alkali metal perchlorates, a binder component comprising av rubbery material selected from the group consisting of natural rubber and synthetic rubbery polymers and mixtures thereof; and from 0.1 to 20 parts by weight per parts by weight of said base propellant of a diamine dinitrate characterized by the structural formula at t/ A k R N0 N0 R wherein: R is an alkylene or alkenylene group containing from 2 to 14 carbon atoms; R is an alkyl group containing from'l to 4 carbon atoms, Which alkyl groups can be alike and unlike; and wherein the total number of carbon atoms in the molecule does not exceed 18.
Said diamine dinitrates are elfective at low concentrations, are compatible with other propellant ingredients, are stable under the conditions of use, and do not leave any undesirable residue upon burning. The action of said diamine dinitrates in depressing the burning rate is believed to be unique for said perchlorate containing proellants. For example, in copending application Serial No. 735,907, filed May 16, 1958, of which I am a coinventor, it is disclosed and claimed that many of the above defined diamine dinitrates increase the burning rate of composite type propellants containing ammonium nitrate and/ or an alkali metal nitrate as the oxidizer component. Furthermore, said diamine dinitrates in said copending application also serve as a processing aid in that they facilitate mixing and increase the extrudability of high oxidizer content nitrate containing propellants. Qualitative tests have shown that the above defined diamine dinitrates do not facilitate the processing of perchlorate containing propellants.
Representative diamine dinitrates which can be used in the practice of the invention include, among others, the following:
N,N,N',N-tetramethyl-2,B-diaminobutane dinitrate; N,N,N,N-tetramethyl-3,4-diaminohexane dinitrate; N,N,N',N-tetramethyl-1,2-diaminoethane dinitrate; N,N,N',N'-tetramethyl-1,3-diaminopropane dinitrate; N,N,N,N-tetramethyl-1,4-diaminopropane dinitrate; N,N,N',N-tetramethyl-1,6-diaminohexane dinitrate; N,N,N,N tetramethyl-l,3-diamino-2,Z-dimethylpropane dinitrate; N,N,N,N-tetramethyl 1,3 dianfino-Z-ethylpropane dinitrate; N,N,N,N-tetramethyl-2,4-diaminooctane dinitrate; N,N,N',N'-tetramethyl-1,3-diaminobutane dinitrate; N,N,N,N'-tetramethyl-1,4-diaminobutane dinitrate; N,N,N',N-tetramethyl-2,S-diaminohexane dinitrate;
N,N,N',N'-tetraethyl-1,3-diaminobutane dinitrate; N,N,N,N'-tetramethyl-1,4-diaminobutene-2 dinitrate; N,N-dimethyl-N,N'-diethyl-1,3-diaminobutane dinitrate; N,N,N,N-tetramethyl-1,5-diaminotetradecane dinitrate; N,N,N,N-tetra-n-propyl-1,3-diaminobutane dinitrate; N,N,N,N'-tetraethyl-l,3-diaminodecene-2 dinitrate; N,N,N,N-tetra-iso-propyl-1,4-diaminobutane dinitrate; N,N,N',N tetramethyl-1,5-diamino-2,4-dimethylpentane dinitrate; N,N,N',N-tetramethyl-l,8-diamino-3,6-dipropyl0ctane dinitrate;
N,N-dimethyl-N,N' diethyl-l,l-diatnino-2,8-dimethyldecane dinitrate;
N,N,N',N-tetramethyl-1,8-diaminooctane dinitrate; N,N,N,N-tetramethyl-1,14-diaminotetradecane dinitrate; N,N,N',N'-tetraethyl-1,2-diaminoethylene dinitrate; N,N,N,N-tetramethyl-1,3-diarninododecene-1 dinitrate;
and
l,l-bis(dimethylamino) ethane.
The amine nitrates employed in the practice of the invention can be prepared by several methods. One method is to react a suitable amine with nitric acid. Another method which can be employed is to form a salt of the amine such as a hydrochloride or an acetate, and then react the amine salt with nitric acid.
The quantity of the diamine dinitrate employed can be in the range of about 0.1 to about 20 parts by weight per 100 parts by weight of the base propellant. Usually, amounts in the range of 0.1 to 10 parts by weight per 100 parts by weight of base propellant are preferred, and amounts in the range of 0.2 to parts are more preferred. As used herein and in the claims unless otherwise specified, the term base propellant is defined as the binder component plus the oxidant component. The rubbery material employed in the binder component of the propellant compositions of the invention can be a natural rubber, a synthetic rubbery polymer, or a mixture of natural rubber and said rubbery polymer. The term rubbery polymer as used herein and in the claims, unless otherwise specified, is defined as including all rubbery polymers of olefins and diolefins which are prepared by either mass or emulsion polymerization. Some examples of suitable rubbery polymers are polybutadiene, polyisobutylene, polyisoprcne, copolymers of isobutylene and isoprene, copolymers of conjugated dienes with comonomers such as styrene, and copolymers of conjugated dienes with polymerizable heterocyclic nitrogen bases. Said copolymers of conjugated dienes with polymerizable heterocyclic bases comprise a preferred class of rubbery polymers for use in the binder component of the propellants of the invention. A presently preferred rubbery polymer is a copolymer of 1,3-butadiene with 2-methyl-5-vinyl- 2-vinylpyridine;
Said preferred class of rubbery polymers prepared by copolymerizing a conjugated diene with a heterocyclic nitrogen base can vary in consistency from very soft rubbers, i.e., materials which are soft at room temperature but will show retraction when relaxed, to those having a Mooney value (ML-4 212 F.) up to 100. The rubbery copolymers most frequently preferred have Mooney values in'the range between 5 and 50. They may be prepared by any polymerization methods known to the art, e.g., mass or emulsion polymerization. One convenient method for preparing these copolymers is by emulsion polymerization at temperatures in the range between 0 and 140 F. Recipes such as the iron pyrophosphatehydroperoxide, either sugar-free or containing sugar, the sulfoxylate, and the persulfate recipes are among those which are applicable. It is advantageous to polymerize to high conversion as the unreacted vinylpyridine monomer is diflicult to remove by stripping.
The conjugated dienes employed are those containing from 4 to carbon atoms per molecule and include 1,3- butadiene, isoprene,, 2-methyl-1,3-butadiene, and the like. Various alkoxy, such as methoxy and ethoxy and cyano derivatives of these conjugated dienes, are also applicable. Other dienes, such as phenylbutadiene; 2,3-dimethyl-l,3- hexadiene; 2-methoxy-3-ethylbutadiene; 2-ethoxy-3-ethyl- 1,3-hexadiene; 2-cyano-l,3-butadiene are also applicable.
Instead of using a single conjugated diene, a mixture of conjugated dienes can be employed. Thus, a mixture of 1,3-butadiene and isoprene can be employed as the conjugated diene portion of the monomer system.
The polymerizable heterocyclic nitrogen bases which are applicable for the production of the polymeric materials are those of the pyridine, quinoline, and isoquinoline series which are copolymerizable with a conjugated diene and contain one, and only one B! CH2=- substituent wherein R is either hydrogen or a methyl group. That is, the substituent is either a vinyl or an alpha-methylvinyl (isopropenyl) group. Of these, the compounds of the pyridine series are of the greatest interest commercially at present. Various substituted derivatives are also applicable but the total number of carbon atoms in the groups attached to the carbon atoms of the heterocyclic nucleus should not be greater than 15 because the polymerization rate decreases somewhat with increasing size of the alkyl group. Compounds where the alkyl substituents are methyl and/or ethyl are available commercially.
These heterocyclic nitrogen bases have the formula R a R R R R R R N N R R N Where R is selected from the group consisting of hydrogen, alkyl, vinyl, alpha-methylvinyl, alkoxy, halo, hydroxy, cyano, aryloxy, aryl, and combinations of these groups such as haloalkyl, alkylaryl, hydroxyaryl, and the like; one and only one of said groups being selected from the group consisting of vinyl and alpha-methylvinyl; and the total number of carbon atoms in the nuclear substituted groups being not greater than 15. Examples of such compounds are 2-vinylpyridine;
2-vinyl-5-ethylpyridine;
2-methyl-5 -vinylpyridine;
4-vinylpyridine; 2,3,4-trimethyl-5-vinylpyridine;
3,4,5 ,6-tetramethyl-2 vinylpyridine; 3-ethyl-5-vinylpyridine; 2,6-diethyl-4-vinylpyridine; 2-isopropyl-4-nonyl-5-vinylpyridine; Z-methyl-S-undecyl-3-vinylpyridine; 2,4-dimethyl-5,6-dipentyl-3 -vinylpyridine; 2-decyl-5-(alpha-methylvinyl) pyridine; 2-vinyl-3-methyl-S-ethylpyridine; 2-methoxy-4-chloro-6-vinylpyridine; 3-vinyl-5-ethoxypyridine; 2-vinyl-4,5-dichloropyridine; 2-(alpha-methylvinyl)-4-hydroxy-6-cyanopyridine; 2-vinyl-4-phenoxy-5-metl1ylpyridine;
2-cyano-5-(alpha-methylvinyl) pyridine; 3-vinyl-5-phenylpyridine; 2- para-methylphenyl) -3 -vinyl-4-methy1pyridine; 3-viny1-5- (hydroxyphenyl) -pyridine; 2-vinylquinoline; 2-vinyl-4-ethylquinoline; 3-vinyl-6,7-di-n-propylquinoline; 2-methyl-4-nonyl-6-vinylpyridine; 4-(alpha-methylvinyl)-8-dodecylquinoline; 3-viny1isoquinoline; l,6-dimethyl-3-vinylisoquinoline; 2-vinyl-4-benzylquinoline; 3-vinyl-5-chloroethylquinoline-3-vinyl-5,6-dichloroisoquinoline; 2-vinyl-6-ethoxy-7-methylquinoline; 3-viny1-6-hydroxymethylisoquinoline; and the like.
Another rubbery polymer which can be employed in the binder of the solid propellant composition of this invention is a copolymer of 1,3-butadiene with styrene.
Such copolymers are commonly known in the art as GR-S rubbers. Said GR-S rubbers can be prepared by any of the well known methods employing well known recipes. Any of the well known GR-S rubbers containing from 1 to 2 and up to about 25 parts of styrene can be used in the practice of the invention. The GR-S rubber designated at 1505 is one preferred copolymer for use in the practice of theinvention. GR-S 1505 can be prepared by copolymerizing 1,3-butadiene with styrene at 41 F. using a sugar free, iron activated, rosin-acid emulsified system. A charge weight ratio of butadiene to styrene is 90/10 and the polymerization is allowed to go to approximately 52 percent completion. The copolymer is then salt acid coagulated and usually has a mean raw Mooney value (ML-4) of about 40. Said copolymers usually have a bound styrene content of about 8 weight percent. Further details regarding the preparation of GR-S rubbers can be found in Industrial and Engineering Chemistry, 40, pages 769 to 777 (1948), and United States Patents 2,583,277; 2,595,892; 2,609,362; 2,614,100; 2,647,109; and 2,665,269.
The binder contains rubbery polymers of the type hereinbefore described and, in addition, there can be present one or more reinforcing agents, plasticizers, wetting agents, and antioxidants. Other ingredients which are employed for sulfur vulcanization include a vulcanization accelerator, a vulcanizing agent, such as sulfur, and an accelerator activator, such as zinc oxide. The finished binder usually contains various compounding ingredients. Thus, it will be understood that herein and in the claims, unless otherwise specified, the term binder is employed generically and includes various conventional compounding ingredients. The binder content of the base propellant composition will usually range from to 40 percent by weight. A commonly preferred range for said binder content is from 5 to 25 weight percent.
The copolymer comprising a conjugated diene and a polymerizable heterocyclic nitrogen base can also be cured by a quaternization reaction by incorporating therein a quaternizing agent and subjecting the resulting mixture to quaternizing conditions of temperature. Suitable quaternizing agents include alkyl halides such as methyl iodide and methyl bromide; alkylene halides such as methylene iodide and ethylene bromide; substituted alkanes such as chloroform and bromoform; alkyl sulfates such as methyl sulfate; and various substituted arornatic compounds such as benzoyl chloride, methyl benzene sulfonate, benzo-trichloride, hexachloro-p-xylene, benzal chloride, and the like.
The quaternizing temperature is usually in the range of 0 to 175 C., although temperatures outside this range can be used.
A general formulation for the binder component of the propellant composition of the invention is as follows:
Parts by weight Rubber 100 Reinforcing agent 0-50 Plasticizer 0-100 Wetting agent 0-10 Antioxidant 0-3 vulcanization accelerator 0-5 Sulfur 0-2 Metal oxide 0-5 Quaternizing agent 0-25 be used. Materials Which provide a rubber having good low temperature properties are preferred. It is also frequently preferred that the plasticizers be oxygen-containing materials.
Wetting agents aid in deflocculating or dispersing the oxidizer. Aerosol OT (dioctyl ester of sodium sulfosuccinic acid), lecithin, and Duomeen C diacetate (the diacetate of trimethylenediamine substituted by a coconut oil product) are among the materials which are applicable.
Antioxidants which can be employed include Flexamine (physical mixture containing 65 percent of a complex diarylamine-ketone reaction product and 35 percent of N,N-diphenyl-p-phenylenediamine), phenyl betanaphthylamine, 2,2-methylene-bis(4-methyl-6-tert-butylphenol), and the like. Rubber antioxidants, in general, can be employed or, if desired, can be omitted.
Examples of vulcanization accelerators are those of the carbamate type, such as N,N-dimethyl-S-tert-butylsulfenyl dithiocarbamate and Butyl-Eight. Butyl-Eight is a rubber accelerator of the dithiocarbamate type supplied by the R. F. Vanderbilt Company and described in Handbook of Material Trade Names by Zimmerman and Lavine, 1953 edition, as a brown liquid; specific gravity 1.01; partially soluble in water and gasoline; and soluble in acetone, alcohol, benzol, carbon disulfide and chloroform.
It is to be understood that each of the various types of compounding ingredients can be used singly or mixtures of various ingredients performing a certain function can be employed. It is sometimes preferred, for example, to use mixtures of plasticizers rather than a single material.
Oxidizers which are applicable in the solid propellant compositions of the invention are ammonium perchlorate and the alkali metal perchlorates. As used herein, the term alkali metal includes sodium, potassium, lithium, cesium, and rubidium. Ammonium perchlorate is the presently preferred oxidizer. Mixtures of said oxidizers are also applicable. In the preparation of the solid rocket propellant compositions, the oxidizers are ground to a particle size preferably within the range between 20 and 200 microns average particle size. The most preferred particle size is from about 40 to about 60 microns. The amount of oxidizer used is a major amount of the total composition and is usually within the range of about 60 to about weight percent of the base propellant, i.e.,
binder plus oxidizer. A commonly preferred range for said oxidizer content is from 75 to 95 weight percent.
Finely divided high energy additives can also be included in the propellant compositions of the invention. Examples of suitable high energy additives, include, among others, the following: aluminum, boron, magnesium, iron, beryllium, lithium, alloys of aluminum, alloys of magnesium, and mixtures thereof. It is preferred that said finely divided high energy additives have a particle size less than 50 microns, more preferably less than 20 microns, and still more preferably, less than 10 microns. Said high energy additives can be used in amounts of from to weight percent of the base propellant. 'In some instances greater amounts can be used.
The various ingredients in the propellant composition can be mixed on a roll mill or an internal mixer such as a Banbury or a Baker-Perkins dispersion blade mixer can be employed. The binder forms a continuous phase in the propellant with the oxidant as the discontinuous phase. One procedure for blending the propellant ingredients utilizes a stepwise addition of oxidizer ingredient. The binder ingredients are mixed to form a binder mixture and the oxidizer ingredient, having the diamine dinitrate dry blended therewith, is then added to said binder mixture in increments, usually 3 to 5, but fewer or more can be used.
After the propellant composition has been formulated as indicated above, or by any other suitable mixing technique, rocket grains can be formed by extrusion, compression molding, or injection molding, utilizing techniques known to those skilled in the art. The grain can be cured by heating. The curing temperature will generally be in the range between 70 and 250 F., preferably between 170 and 200 F. The curing time must be long enough to give required creep resistance and other mechanical properties in the propellant. The time will generally range from around three hours, when the higher curing temperatures are employed, to seven days when curing is effected at lower temperatures.
The following examples will serve to further illustrate the invention.
EXAMPLE I A 1,3-butadiene/2-methyl-5-vinylpyridine rubbery copolymer was prepared by emulsion polymerization at 41 F. in accordance with the following recipe:
1 Fifty-five runs were made using the above polymerization recipe. The latex was masterbatched with 19.5 parts of Philblack A (a trademark of Phillips Petroleum Company for a low abrasion furnace carbon black) per 100 parts of rubber. The black masterbatch was then acid coagulated, washed with water, and dried. The average conversion for these 55 runs was 85 percent in 17.0 hours. The amount of modifier used in each run was in the range of 0.60 to 0.80 part by weight.
3 Based on 100 parts by weight of rubber.
Two and one-half parts by weight per 100 parts by weight of rubber of said low abrasion furnace carbon black was milled into the rubber prepared as described above. This increased the amount of carbon black present to 22 parts/100 parts of rubber. Three parts by weight per 100 parts by weight of rubber of Flexamine, a physical mixture containing 65% of a complex diarylamine-ketone reaction product and 35% of N,N-diphenylp-phenylene-diamine, was also milled into said copolymer.
The thus prepared rubber masterbatch was used to prepare a binder having the composition set forth in Table I below. Said binder was prepared by mixing said masterbatch and other ingredients in a Baker-Perkins mixer. Mixing was continued until a uniform binder composition was obtained.
Table I Parts by weight Copolymer 100 Carbon black 22 Phenyl-beta-naphthylamine 1.75 Liquid polybutadiene 20 Butyl Eight 1 2 Sulfur 1.75 Zinc oxide 3 Magnesium oxide 5 Flexamine 2 3 Activated dithiocarbamate accelerator. 2 65% diarylamine-ketone reaction product, 35% diphenylp-phenylenediamine.
The liquid polybutadiene employed in said binder composition was prepared by mass polymerization using finely divided sodium as the catalyst. Said polybutadiene had the following properties:
Specific gravity, 60/60 F. Density at 60 F., lbs/gal. 7.5 Refractive index, n 1.5174 Iodine number 365-385 Ash, wt. percent 0.05 Color, Gardner 11 Volatile material, wt. percent 1.0 Saybolt Furol viscosity at 100 F 25'00 Propellant compositions containing the above binder in amounts of 15 parts by weight and ammonium perchlorate oxidizer in amounts of parts by weight, and with and without N,N,N',N'-tetramethyl-1,3-diaminobutane dinitrate incorporated therein, were prepared in the following manner. First, equal portions of said binder and said oxidizer were mixed in a Baker-Perkins mixer. Portions of the resulting mixture were then blended with (a) additional oxidizer to bring the amount of oxidizer up to the desired amount or (b) with additional oxidizer and said amine dinitrate to give the propellant compositions shown in Table II below.
The uniform blends thus produced were extruded into strands having a diameter of inch. Said strands were cut into sections approximately seven inches in length. Said strand sections were restricted on all surfaces except on one end, so as to prevent burning except on said one end, and then cured for 24 hours at a temperature of approximately 180 F. preparatory to determining burning rates.
Said burning rates were determined by placing the cured, restricted strand sections in a bomb and then pressuring the bomb to the desired pressure with nitrogen. The bomb was then placed in a temperature bath maintained at 70 F. The strands were then ignited and the time required for the propellant to burn between two fusible wires spaced a known distance apart was recorded. The burning rate was then calculated in inches per second. The results of said burning rate tests are given in Table H below.
Table II Burning rate, in./see. at Amine a pressure, p.s.i.g. ofdinitrate. amount; 1
Propellant N o.
1 Parts by weight per parts by weight of base propellant containing 85 parts of oxidizer and 15 parts of binder.
The ammonium perchlorate used in the propellant compositions of Table II above was a 70-30 mixture of two finely ground products having a weight average particle size of 74 and 15 microns, respectively. Three additional propellant compositions were prepared as described above for propellants 1 and 2 except that the ammonium perchlorate oxidizer used was a 70-30 mixture of two finely ground products having a weight average particle size of 210 and 40 microns, respectively. Results of burning rate tests on said last mentioned three propellants are given in Table HI below.
1 Parts by weight per 100 parts by weight of base propellant containing 85 parts of oxidizer and 15 parts of binder.
The results of the above tests demonstrate that the amine dinitrates of the invention can be effectively utilized to effect a reduction in burning rate of solid propellants containing a perchlorate oxidizer component.
As will be apparent to those skilled in the art, various other modifications of the invention can be made or followed in view of the above disclosure without departing from the spirit and scope of said invention.
I claim:
1. A propellant composition comprising from 60 to 95 weight percent of an oxidizer component selected from the group consisting of ammonium perchlorate and the alkali metal perchlorates, and from 5 to 40 weight percent of a binder component comprising a rubbery material selected from the group consisting of natural rubber and synthetic rubbery polymers; and from 1.0 to 20 parts by weight per 100 parts by weight of the total amount of said oxidizer component plus said binder component of a diamine dinitrate characterized by the structural formula i) n k R NO; NO; R
wherein: R is selected from the group consisting of alkylene and alkenylene groups containing from 2 to 14 carbon atoms; R is an alkyl group containing from 1 to 4 carbon atoms, which alkyl groups can be alike and unlike; and wherein the total number of carbon atoms in the molecule does not exceed 18.
2. A propellant composition according to claim 1 wherein said oxidizer component is ammonium perchlorate.
3. A propellant composition according to claim 1 wherein said rubbery material is natural rubber.
4. A propellant composition according to claim 1 wherein said rubbery material is a copolymer prepared by copolymerizing a conjugated diene containing from 4 to carbon atoms with at least one substituted heterocyclic nitrogen base selected from the group consisting of pyridine, quinoline, alkyl substituted pyridine and alkyl substituted quinoline wherein the total number of carbon atoms in the nuclear alkyl substituents is not more than 15 and wherein R is selected from the group consisting of a hydrogen atom and a methyl radical.
5. A propellant composition according to claim 4 wherein said copolymer is a copolymer of 1,3-butadiene with 2-methy1-5-vinylpyridine.
6. A propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N',N'-tetramethyl- 1,3-diaminobutane dinitrate.
7. A propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N,N'-tetramethyl- 1,6-diaminohexane dinitrate.
8. A propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N,N-tetramethyll,4-diamino-2,3-dimethylbutane dinitrate.
9. A propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N,N'-tetramethyl- 1,3-diamino-2,2-dimethylpropane dinitrate.
10. A propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N,N'-tetramethyl- 1,4-diaminobuta-ne dinitrate.
11. A propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N,N'-tetraethyl- 1,3-diaminobutane dinitrate.
12. A propellant composition according to claim 1 wherein said diamine dinitrate is N,N,N,N'-tetramethyl- 1,3-diaminopropane dinitrate.
13. A propellant composition according to claim 1 wherein said diamine dinitrate is N,N-dimethyl-N',N-diethyl-1,3-diaminobutane dinitrate.
14. A propellant composition according to claim 1 wherein: said oxidizer component is ammonium perchlorate; said rubbery material is a copolymer prepared by copolymerizing a conjugated diene containing from 4 to 10 carbon atoms with at least one substituted heterocyclic nitrogen base selected from the group consisting of pyridine, quinoline, alkyl substituted pyridine and alkyl substituted quinoline wherein the total number of carbon atoms in the nuclear alkyl substituents is not more than 15 and wherein R is selected from the group consisting of a hydrogen atom and a methyl radical; and. said amine dinitrate is N,N,N',N'-tetramethyl-1,3-diaminobutane dinitrate.
15. A propellent composition according to claim 14 wherein said copolymer is a copolymer of 1,3-butadiene with Z-methyl-S-vinylpyridine.
16. A propellant composition according to claim 1 wherein said oxidizer component is ammonium perchlorate and said rubbery material is a copolymer of l,3- butadeine with 2-rnethyl-5-vinylpyridine.
17. A propellant composition according to claim 1 wherein said rubbery material is a copolymer of 1,3-butadiene with Z-methyl-S-vinylpyridine and said diamine dinitrate is N,N,N',N'-tetramethyl-1,3-diaminobutane dinitrate.
18. A propellant composition according to claim 1 wherein the amount of said diamine dinitrate is within the range of 0.2 to 5 parts by weight per parts by weight of the total amount of said oxidizer component plus said binder component.
References Cited in the file of this patent V UNITED STATES PATENTS 2,159,234 Taylor et a1 May 23, 1939 2,406,572 Voge Aug. 27, 1946 2,877,504 Fox Mar. 17, 1959 FOREIGN PATENTS 655,585 Great Britain July 25, 1951 OTHER REFERENCES Chem. and Eng. News, Oct. 7, 1957, pp. 62-3.
Claims (1)
1. A PROPELLANT COMPOSITION COMPRISING FROM 60 TO 95 WEIGHT PERCENT OF AN OXIDIZER COMPONENT SELECTED FROM THE GROUP CONSISTING OF AMMONIUM PERCHLORATE AND THE ALKALI METAL PERCHLORATES, AND FROM 5 TO 40 WEIGHT PERCENT OF A BINDER COMPONENT COMPRISING A RUBBERY MATERIAL SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER AND SYNTHETIC RUBBERY POLYMERS; AND FROM 1.0 TO 20 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF THE TOTAAL AMOUNT OF SAID OXIDIZER COMPONENT PLUS SAID BINDER COMPONENT OF A DIAMIONE DINITRATE CHARACTERIZED BY THE STRUCTURAL FORMULA
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US3625782A (en) * | 1968-05-02 | 1971-12-07 | Aerojet General Co | Solid propellants containing burning rate depressants |
US3779822A (en) * | 1963-07-22 | 1973-12-18 | Aerojet General Co | Composite propellant containing organic amine perchlorates |
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US2159234A (en) * | 1935-03-11 | 1939-05-23 | Ici Ltd | Gas-producing nondetonating composition |
US2406572A (en) * | 1941-06-13 | 1946-08-27 | Ralph E Svoboda | Explosive perchlorates of aliphatic nitrogenous compounds |
GB655585A (en) * | 1947-09-29 | 1951-07-25 | Frans Tore Baltzar Bonell | Improvements in or relating to methods for producing propellent charges for rockets and the like |
US2877504A (en) * | 1954-08-02 | 1959-03-17 | Phillips Petroleum Co | Method of bonding propellant grain to metal case |
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1958
- 1958-12-29 US US783617A patent/US3024144A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US2159234A (en) * | 1935-03-11 | 1939-05-23 | Ici Ltd | Gas-producing nondetonating composition |
US2406572A (en) * | 1941-06-13 | 1946-08-27 | Ralph E Svoboda | Explosive perchlorates of aliphatic nitrogenous compounds |
GB655585A (en) * | 1947-09-29 | 1951-07-25 | Frans Tore Baltzar Bonell | Improvements in or relating to methods for producing propellent charges for rockets and the like |
US2877504A (en) * | 1954-08-02 | 1959-03-17 | Phillips Petroleum Co | Method of bonding propellant grain to metal case |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US3779822A (en) * | 1963-07-22 | 1973-12-18 | Aerojet General Co | Composite propellant containing organic amine perchlorates |
US3625782A (en) * | 1968-05-02 | 1971-12-07 | Aerojet General Co | Solid propellants containing burning rate depressants |
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