US3476622A - Carboxy-terminated composite rocket propellant and process for producing using an amide additive - Google Patents
Carboxy-terminated composite rocket propellant and process for producing using an amide additive Download PDFInfo
- Publication number
- US3476622A US3476622A US692147A US3476622DA US3476622A US 3476622 A US3476622 A US 3476622A US 692147 A US692147 A US 692147A US 3476622D A US3476622D A US 3476622DA US 3476622 A US3476622 A US 3476622A
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- US
- United States
- Prior art keywords
- acid
- propellant
- compound
- compounds
- composition
- 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
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- 239000003380 propellant Substances 0.000 title description 72
- 239000002131 composite material Substances 0.000 title description 10
- 238000000034 method Methods 0.000 title description 10
- 150000001408 amides Chemical class 0.000 title description 6
- 239000000654 additive Substances 0.000 title description 2
- 230000000996 additive effect Effects 0.000 title description 2
- 239000000203 mixture Substances 0.000 description 65
- -1 cyclic imine Chemical class 0.000 description 62
- 150000001875 compounds Chemical class 0.000 description 36
- 239000011230 binding agent Substances 0.000 description 33
- 239000000446 fuel Substances 0.000 description 33
- 150000002894 organic compounds Chemical class 0.000 description 18
- 125000003700 epoxy group Chemical group 0.000 description 16
- 239000003054 catalyst Substances 0.000 description 15
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 14
- 125000000879 imine group Chemical group 0.000 description 13
- 125000004122 cyclic group Chemical group 0.000 description 12
- 239000007788 liquid Substances 0.000 description 12
- 239000007800 oxidant agent Substances 0.000 description 12
- 239000002253 acid Substances 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 11
- 239000005062 Polybutadiene Substances 0.000 description 9
- 239000003607 modifier Substances 0.000 description 9
- 229920002857 polybutadiene Polymers 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 7
- 239000004014 plasticizer Substances 0.000 description 7
- 150000001412 amines Chemical class 0.000 description 6
- 239000000945 filler Substances 0.000 description 6
- 238000010348 incorporation Methods 0.000 description 6
- 229920006395 saturated elastomer Polymers 0.000 description 6
- OYBMVMAXKOGYDC-UHFFFAOYSA-N CTPB Chemical compound CCCCCCCCCCCCCCCC1=CC=CC(OCC)=C1C(=O)NC1=CC=C(Cl)C(C(F)(F)F)=C1 OYBMVMAXKOGYDC-UHFFFAOYSA-N 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 5
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 5
- 239000010685 fatty oil Substances 0.000 description 5
- 150000002763 monocarboxylic acids Chemical class 0.000 description 5
- 150000003254 radicals Chemical class 0.000 description 5
- 238000009864 tensile test Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 4
- 239000003431 cross linking reagent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 4
- 150000002367 halogens Chemical class 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229920001897 terpolymer Polymers 0.000 description 4
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 4
- IRIIKYVSZMJVNX-UHFFFAOYSA-N 2,4,6-tris(2-methylaziridin-1-yl)-1,3,5-triazine Chemical compound CC1CN1C1=NC(N2C(C2)C)=NC(N2C(C2)C)=N1 IRIIKYVSZMJVNX-UHFFFAOYSA-N 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical group C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 150000002118 epoxides Chemical class 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- DGUJJOYLOCXENZ-UHFFFAOYSA-N 4-[2-[4-(oxiran-2-ylmethoxy)phenyl]propan-2-yl]phenol Chemical compound C=1C=C(OCC2OC2)C=CC=1C(C)(C)C1=CC=C(O)C=C1 DGUJJOYLOCXENZ-UHFFFAOYSA-N 0.000 description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 2
- VVJKKWFAADXIJK-UHFFFAOYSA-N Allylamine Chemical compound NCC=C VVJKKWFAADXIJK-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 description 2
- 239000005642 Oleic acid Substances 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 230000002730 additional effect Effects 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 235000001014 amino acid Nutrition 0.000 description 2
- 150000001413 amino acids Chemical class 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- QMKYBPDZANOJGF-UHFFFAOYSA-N benzene-1,3,5-tricarboxylic acid Chemical compound OC(=O)C1=CC(C(O)=O)=CC(C(O)=O)=C1 QMKYBPDZANOJGF-UHFFFAOYSA-N 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 125000006367 bivalent amino carbonyl group Chemical group [H]N([*:1])C([*:2])=O 0.000 description 2
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 150000001735 carboxylic acids Chemical class 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 150000001923 cyclic compounds Chemical class 0.000 description 2
- LTMQQXHKUCSFPE-UHFFFAOYSA-N deca-1,9-diene;urea Chemical compound NC(N)=O.C=CCCCCCCC=C LTMQQXHKUCSFPE-UHFFFAOYSA-N 0.000 description 2
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 2
- 229960002380 dibutyl phthalate Drugs 0.000 description 2
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 2
- TXXHDPDFNKHHGW-UHFFFAOYSA-N muconic acid Chemical compound OC(=O)C=CC=CC(O)=O TXXHDPDFNKHHGW-UHFFFAOYSA-N 0.000 description 2
- 150000002828 nitro derivatives Chemical class 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical class OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- WLJVNTCWHIRURA-UHFFFAOYSA-N pimelic acid Chemical compound OC(=O)CCCCCC(O)=O WLJVNTCWHIRURA-UHFFFAOYSA-N 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 2
- KIDHWZJUCRJVML-UHFFFAOYSA-N putrescine Chemical compound NCCCCN KIDHWZJUCRJVML-UHFFFAOYSA-N 0.000 description 2
- 229930195734 saturated hydrocarbon Natural products 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- RGTIBVZDHOMOKC-UHFFFAOYSA-N stearolic acid Chemical compound CCCCCCCCC#CCCCCCCCC(O)=O RGTIBVZDHOMOKC-UHFFFAOYSA-N 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 2
- IUCJMVBFZDHPDX-UHFFFAOYSA-N tretamine Chemical compound C1CN1C1=NC(N2CC2)=NC(N2CC2)=N1 IUCJMVBFZDHPDX-UHFFFAOYSA-N 0.000 description 2
- 229950001353 tretamine Drugs 0.000 description 2
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- SDVVLIIVFBKBMG-ONEGZZNKSA-N (E)-penta-2,4-dienoic acid Chemical compound OC(=O)\C=C\C=C SDVVLIIVFBKBMG-ONEGZZNKSA-N 0.000 description 1
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- JLIDBLDQVAYHNE-IBPUIESWSA-N (s)-(+)-Abscisic acid Natural products OC(=O)\C=C(/C)\C=C\[C@@]1(O)C(C)=CC(=O)CC1(C)C JLIDBLDQVAYHNE-IBPUIESWSA-N 0.000 description 1
- WBYWAXJHAXSJNI-VOTSOKGWSA-M .beta-Phenylacrylic acid Natural products [O-]C(=O)\C=C\C1=CC=CC=C1 WBYWAXJHAXSJNI-VOTSOKGWSA-M 0.000 description 1
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 1
- ZGCHLAJIRWDGFE-UHFFFAOYSA-N 1-aminopropane-1,1-diol Chemical compound CCC(N)(O)O ZGCHLAJIRWDGFE-UHFFFAOYSA-N 0.000 description 1
- BMVXCPBXGZKUPN-UHFFFAOYSA-N 1-hexanamine Chemical compound CCCCCCN BMVXCPBXGZKUPN-UHFFFAOYSA-N 0.000 description 1
- RUFPHBVGCFYCNW-UHFFFAOYSA-N 1-naphthylamine Chemical compound C1=CC=C2C(N)=CC=CC2=C1 RUFPHBVGCFYCNW-UHFFFAOYSA-N 0.000 description 1
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 1
- KCAMLFCTSSYIFW-UHFFFAOYSA-N 2,4,6-tris(dimethylamino)phenol Chemical compound CN(C)C1=CC(N(C)C)=C(O)C(N(C)C)=C1 KCAMLFCTSSYIFW-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- MXZROAOUCUVNHX-UHFFFAOYSA-N 2-Aminopropanol Chemical compound CCC(N)O MXZROAOUCUVNHX-UHFFFAOYSA-N 0.000 description 1
- OZDGMOYKSFPLSE-UHFFFAOYSA-N 2-Methylaziridine Chemical group CC1CN1 OZDGMOYKSFPLSE-UHFFFAOYSA-N 0.000 description 1
- MMEDJBFVJUFIDD-UHFFFAOYSA-N 2-[2-(carboxymethyl)phenyl]acetic acid Chemical compound OC(=O)CC1=CC=CC=C1CC(O)=O MMEDJBFVJUFIDD-UHFFFAOYSA-N 0.000 description 1
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- GDDNTTHUKVNJRA-UHFFFAOYSA-N 3-bromo-3,3-difluoroprop-1-ene Chemical compound FC(F)(Br)C=C GDDNTTHUKVNJRA-UHFFFAOYSA-N 0.000 description 1
- NEQFBGHQPUXOFH-UHFFFAOYSA-N 4-(4-carboxyphenyl)benzoic acid Chemical group C1=CC(C(=O)O)=CC=C1C1=CC=C(C(O)=O)C=C1 NEQFBGHQPUXOFH-UHFFFAOYSA-N 0.000 description 1
- XVMSFILGAMDHEY-UHFFFAOYSA-N 6-(4-aminophenyl)sulfonylpyridin-3-amine Chemical compound C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=N1 XVMSFILGAMDHEY-UHFFFAOYSA-N 0.000 description 1
- OYHQOLUKZRVURQ-UHFFFAOYSA-N 9,12-Octadecadienoic Acid Chemical compound CCCCCC=CCC=CCCCCCCCC(O)=O OYHQOLUKZRVURQ-UHFFFAOYSA-N 0.000 description 1
- WDJHALXBUFZDSR-UHFFFAOYSA-N Acetoacetic acid Natural products CC(=O)CC(O)=O WDJHALXBUFZDSR-UHFFFAOYSA-N 0.000 description 1
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000005711 Benzoic acid Substances 0.000 description 1
- 239000005632 Capric acid (CAS 334-48-5) Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- WBYWAXJHAXSJNI-SREVYHEPSA-N Cinnamic acid Chemical compound OC(=O)\C=C/C1=CC=CC=C1 WBYWAXJHAXSJNI-SREVYHEPSA-N 0.000 description 1
- 229910021591 Copper(I) chloride Inorganic materials 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
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- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
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- UYMKPFRHYYNDTL-UHFFFAOYSA-N ethenamine Chemical compound NC=C UYMKPFRHYYNDTL-UHFFFAOYSA-N 0.000 description 1
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- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
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- BTCSSZJGUNDROE-UHFFFAOYSA-N gamma-aminobutyric acid Chemical compound NCCCC(O)=O BTCSSZJGUNDROE-UHFFFAOYSA-N 0.000 description 1
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- 229910001510 metal chloride Inorganic materials 0.000 description 1
- RTWNYYOXLSILQN-UHFFFAOYSA-N methanediamine Chemical compound NCN RTWNYYOXLSILQN-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- WBYWAXJHAXSJNI-UHFFFAOYSA-N methyl p-hydroxycinnamate Natural products OC(=O)C=CC1=CC=CC=C1 WBYWAXJHAXSJNI-UHFFFAOYSA-N 0.000 description 1
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- 150000002823 nitrates Chemical class 0.000 description 1
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- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
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- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
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- JKANAVGODYYCQF-UHFFFAOYSA-N prop-2-yn-1-amine Chemical compound NCC#C JKANAVGODYYCQF-UHFFFAOYSA-N 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- UORVCLMRJXCDCP-UHFFFAOYSA-N propynoic acid Chemical compound OC(=O)C#C UORVCLMRJXCDCP-UHFFFAOYSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 125000000714 pyrimidinyl group Chemical group 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 239000011369 resultant mixture Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 1
- 239000010703 silicon Chemical group 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
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- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- 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 1
- YIYBQIKDCADOSF-ONEGZZNKSA-N trans-pent-2-enoic acid Chemical compound CC\C=C\C(O)=O YIYBQIKDCADOSF-ONEGZZNKSA-N 0.000 description 1
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- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Images
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
- FIGS MAXIMUM STRESS SHORE HARDNESS STRAIN AT MAXIMUM STRESS TADAMASA HARADA ET AL 3,47 C ARBOXY-TERMINATED COMPOSITE ROCKET PROPELLANT AND PROCESS FOR PRODUCING USING AN AMIDE ADDITIVE Filed D80. 20, 1967 NO. I
- a composite propellant consisting of a fuel binder mainly comprising liquid organic compounds containing carboxyl group, an epoxy group-containing compound and/or a cyclic imine groupcontaining compound, and anoxidizing agent characterized by having present in the propellant composition an amide compound.
- This invention relates to a composite propellant (hereinafter referred to as prope1lant) and a process for producing the same, and, more particularly, it relates to an improvement in the mechanical properties of such propellant by incorporating a novel material thereinto.
- propellants consisting of a fuel binder mainly comprising liquid organic compounds having carboxyl group in their molecules and epoxy group-containing compounds and/or cyclic imine group-containing compounds, and an organic or inorganic oxidizing agents.
- the propellants are, after the production thereof followed by transportation and storing, combusted in rocket engines under a pressurized condition to utilize the total impulse generated at that time.
- the propellants are subjected to various static or dynamic stresses exerted thereon and the propellants must endure the deformation and destruction caused therefrom.
- the propellants are required to have a combination of excellent combustion performance and mechanical properties.
- the mechanical properties of the propellants are variable by changing the type of fuel binder, the type and amount of oxidizing agent used and the type of modifier used to improve the combustion performance
- the improvement in the mechanical properties of propellants is now chiefly relying upon the alteration of type of fuel binder used, since the type and amount of oxidizing agent and the type of modifier may not be changed due to the necessity for preserving the combustion performance of the propellants.
- the mechanical "ice properties of propellants tend to be deteriorated because the propellants normally contain 40-90 parts by weight of powdered solid oxidizing agent.
- the most conventional compound of liquid organic compounds containing carboxyl group which relate to the propellant of this invention is carboxylated polybutadiene.
- the carboxylated polybutadiene mentioned above is a typical example of fuel binder for a propellant at present because it has advantages in that the propellant containing the same shows superior mechanical properties at low temperatures and delivers higher energy over the propellants using the conventional fuel binders such as polysulfide, polyurethane, etc.
- the propellant containing carboxylated polybutadiene has a drawback in that it has poor mechanical properties at temperatures in the vicinity of room temperature.
- the propellant containing carboxylated polybutadiene has been unsuccessful so far.
- the object of this invention is to improve the mechanical properties of a propellant containing a fuel binder which is obtained by adding epoxy group-containing compound and/or cyclic imine groupcontaining compound to liquid organic compounds having carboxyl group in their molecules, and, if required, incorporating a catalyst, a plastizer and a filler into the resulting mixture, and curing the same by the reaction of carboxyl group with epoxy group and/or cyclic imine group.
- the fuel binder mentioned above may be referred to as ester-type fuel binders.
- the mechanical properties of the propellant may be remarkably improved by the incorporation of an amide compound into the propellant composition at the time of preparing the same, preferably at the time of preparing the ester-type fuel binder.
- the oxidizing agents which may be used in the propellant of this invention in the amounts ranging 40-90% by weight based on the total weight of the propellant can be any type of conventional organic or inorganic solid oxidizing agents.
- perchlorates and nitrates of metals, ammonium or hydrazine; organic nitro compounds and addition products of perchloric acids of organic compounds may be used.
- the fuel binders which may be used in the propellant composition of this invention are most preferably those having rubbery properties obtained by a polymerization reaction or a cross-linking reaction of a liquid organic compoundhaving not less than 2 carboxyl groups in its molecule with compound having epoxy group and/or compound having cyclic imine group.
- the liquid organic compounds having carboxyl groups which may be used in the propellant composition of this invention include, copolymers or terpolymers obtained by polymerizing at least one of vinyl compounds such as methylmethacrylate, acryonitrile, vinyl chloride, vinylidene chloride, fiuoroethylene and styrene, conjugated diene compounds such as butadiene, isoprene and chloroprene, unsaturated hydrocarbon compounds such as ethylene, propylene and acetylene, with acrylic acids; organic compounds obtained by carboxylation of homopolymers or copolymers of conjugated diene compounds and aromatic vinyl compounds; and a mixture of two or more kinds thereof.
- Typical examples of the organic compound include carboxyl-terminated polybutadiene, polybutadieneacrylic acid copolymer, and butadiene/acrylic acid/acrylonitrile terpolymer.
- organic compounds containing epoxy group which may be used in the propellant composition of this invention include bisphenol A glycidyl ether, 1-epoxy-3,4-epoxy-cyclohexane, polybutadiene polyepoxide, oleic acid glyceride cpoxidate and fatty oil epoxidates, and any organic compounds having at least 2 epoxy groups per a molecule thereof may be conveniently used.
- Typical examples of compounds containing cyclic imine group which may be used in the propellant composition of this invention include trismethylaziridinyl-phosphine oxide, trisaziridinyl-phosphine oxide, imine-terminated polymer, phenyldimethylaziridinyl-phosphine oxide, tripropylene melamine, triethylene melamine, and hexamethylene bisethylene urea. Any organic compound having at least 2 cyclic imine groups such as ethylene imine and propylene imine groups per a molecule thereof may be conveniently used.
- epoxy group-containing compounds and cyclic imine group-containing compounds may be used either alone or in admixture with two or more kinds.
- the epoxy group-containing compound or cyclic imine group-containing compound is used in an amount of more than 0.5 equivalent, preferably 0.8-5.0 equivalents, calculated for the epoxy or cyclic imine group based on carboxyl group of the liquid organic compound.
- the amide compound newly incorporated thereinto has active hydrogen which reacts with these cyclic compounds.
- the cyclic compound to react with carboxyl group is shorted due to the reaction mentioned above, thus, there is added 3.0 equivalents, preferably 0.21.0 equivalent, of epoxy group and/or cyclic imine group based on the total active hydrogen of the amide compound in order to replenish the shortened amount.
- the epoxy group-containing compound and/or cyclic imine group-containing compound which react with the active hydrogen of amide compound, and those which react with carboxyl group of the liquid organic compound can be the same or different.
- Amide compounds which may be used in the propellant composition of this invention are those having at least one NHCO group per a molecule thereof and generally having the following chemical structures:
- R, R, R and R' represent saturated or unsaturated hydrocarbon having 1-30 carbon atoms which may contain 0, N, S, Si, halogen and/or organo-cyclic compounds; B and B which may be the same or different represent NH; and/or COOH, l and n are values of 0-6, and m is a value of 0-1000, preferably 0400, most preferably 0-30, provided that m is not less than 1 when l and n are both zero, and the above-mentioned R may be H y hen l is zero, ega dless f he va ues of m an I! No particular restriction is imposed on the type of amide compounds so long as they have the chemical structure defined above.
- the amide compounds may be easily and conveniently obtained by reacting organic amines at 70 to 300 C. in the conventional way with carboxyl group of all types of carboxylated compounds including saturated monocarboxylic acids such as acetic acid, propionic acid, butyric acid, valeric acid, capric acid, lauric acid, palmitic acid, and stearic acid; olefinic monocarboxylic acids such as acrylic acid, isocrotonic acid, crotonic acid, vinyl acetic acid, methacrylic acid, pentenoic acid and octenoic acid; acetylenic monocarboxylic acids such as propiolic acid, tetrolic acid, undecynoic acid and stearolic acid; diolefinic acids such as 2,4-pentadienoic acid, diallylacetic acid and 9,12-octadecadienoic acid; higher monocarboxylic acids such as linolenic acid and linoleic acid;
- amines No particular restriction is imposed on the type of amines to be reacted with carboxylic acid so long as they contain NH group.
- saturated and unsaturated monoor poly-amines and oxyamines such as methylamine, propylamine, butylamine, hexylamine, octylamine, methylenediamine, ethylenediamine, tetramethylenediamine, hexamethylenediamine, triaminopropane, tris (2-aminoethyl) amine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, polyethylene imine, vinylamine, allylamine, propargylamine oxyhexylamine, aminopropan diol and aminopropanol; amino acids such as alanine, aminobutyric acid and glycine; cyclic amine or organo-cycle amines such as aniline, phenyl
- the amide compounds which may be used in the propellant composition of this invention may also be obtained by a reaction of isocyanates such as tolylene diisocyanate and hexamethylenediisocyanate with compounds having active hydrogen, such as alcohols, acids and amino acids, or halogenated alkylmagnesium. Moreover, they may also be obtained by reacting carbonyl compounds such as acetone and methylethylketone with ammonia.
- the amide compound is incorporated into the propellant composition in an amount of (ml-5.00%, preferably -0.051.0% by weight based on the weight of the propellant, for a satisfactory result.
- the amounts either less than 0.01% or more than 5% lead to unsatisfactory result.
- the amide compounds may be mixed with uncured fuel binder as uniformly as possible.
- a simple grating machine commonly used may be conveniently used.
- the composition can be mixed by hand, if the amount is small and if the amide compound is crushed sufficiently.
- the amide compound is incorporated into the composition when uncured ester-type fuel binder, oxidizing agent and combustion performance modifier are mixed together, preferably when mixing the uncured ester-type fuel binder alone, and mixed well.
- the ester-type fuel binder, oxidizing agent and combustion perforance modifier are sufficiently mixed and bubbles present are removed, the resulting composition is cast into a desired shape and cured by heating at 40-150" C. for 1-300 hours to give the composite propellant of this invention.
- ester-type fuel binder consists of a major portion comprising liquid organic compound having carboxyl group, epoxy group-containing compound and/or cyclic imine group-containing compound and a minor portion comprising a curing catalyst, a plasticizer and a filler, which may be suitably selected and incorporated, if required.
- the curing catalyst is normally unnecessary when a compound having cyclic imine group is used, it is often necessary when an epoxy compound is used as a major portion of a cross-linking agent. Any curing catalysts may be conveniently used in the propellant composition of this invention and no particular restriction is imposed on the type thereof.
- curing catalysts examples include metal salts of organic acids such as cobalt naphthenate, cobalt octoate and iron naphthenate; amino compounds such as urotropin, 2,4,6-tris-dimethylaminophenol, and ethylenediamine; inorganic salts and/ or oxides such as Fe(NO and ZnO; complex compounds or chelate compounds such as alcohol complex compounds of metal chlorides, methacrylatochromic chloride and ferrosacetylacetonate; and Lewis acids such as AlCl ,CuCl and SnCl
- organic acids such as cobalt naphthenate, cobalt octoate and iron naphthenate
- amino compounds such as urotropin, 2,4,6-tris-dimethylaminophenol, and ethylenediamine
- inorganic salts and/ or oxides such as Fe(NO and ZnO
- complex compounds or chelate compounds such as alcohol complex compounds of metal chlorides, methacrylatochro
- plasticizers conventionally known may be conveniently used, the examples include organic acid esters such as dibutyl phthalate, diethyl phthalate and dioctyladipate; plasticizer containing phosphorus such as tricresyl phosphate; various process oils; formalic plasticizers; and liquid diene polymers.
- plasticizers are incorporated into the fuel binder in an amount of 0-5 0% by weight.
- any conventionally known fillers may be conveniently employed and the examples include carbon blacks known as channel black and furnace black; silicic anhydride and surface treated products thereof; and metal oxides such as ZnO and TiO These fillers may be incorporated into the fuel binder in an amount of 030% by weight.
- the combustion performance modifiers which may be used in the propellant composition of this invention include powders of metals or alloys such as Be, B, Al, Si, Mg, Li and Na; organo-boron compounds and boron hydrides, and organic nitro compounds, all of which enumerated heretofore are effective for increasing the specific impulse of the resulting propellant; metal oxides such as PC3203, F6 0 CUCI'O4, K2CIO4, (NH4)2CT207, V205,
- combustion performance modifiers may be incorporated into the propellant composition in an amount of 0-40% by weight based on the weight of the propellant composition.
- FIG. 1 illustrates the relationship between shore hardness and curing time.
- FIG. 2 illustrates the relationships between the maximum stress and the measuring temperature in the propellant composition of this invention and that of prior art known heretofore. It is shown that the sample No. 9 which is a typical product obtained according to this invention has larger maximum stresses at respective temperatures as compared with the sample N0. 10 which is a conventional product known heretofore.
- FIG. 3 shows the relationships between the strain at maximum stress and the measuring temperature in the propellant composition of this invention and that of prior art known heretofore. It is clearly shown in FIG. 3 that the sample No. 9 has larger strain at maximum stress at respective temperatures, thus, the addition of amide compound has remarkably improved the mechanical properties of the resulting propellant composition.
- these amide compounds react with epoxy groups and/or cyclic imine roups so that amide groups are bound to main chain or side chain of the 'fuel binder in the propellant composition by Way of a chemical bonding, thus, improving the mechanical properties of the resulting propellant composition.
- the rate of curing of the composition is increased.
- the propellant of this type is obtained by mixing the respective ingredients, removing bubbles present and casting the resultant mixture and curing the shaped composition by heating.
- the increasing in the curing rate brings about advantages in that the time required in the curing process can be reduced, that the number of casting dies which are normally expensive can be reduced, and that the curing room can be made smaller.
- the manufacturing cost can be lowered because the manufacturing equipment is made simpler and smaller.
- pot life i.e. the period during which the pro-' cut were removed, the resulting mixture was cast into a desired shape and cured by heating at 70 C. for 5 days.
- FIG. 1 An example of the results obtained is shown in FIG. 1.
- the Shore hardness was measured according to ASTM 1706-59T, Type A.
- Type- AM-l AM-2 AM-3 AM-4 AM-5 AM-G AM-7 Amount 0. 2 0. 2 0. 2 0. 2 0. 2 9. 2 9. 2 APCl-.. 80. 0 80. 0 80. 0 80. 0 80. 0 80. 0 80. 0 80. 0 Al powder- 19. 0 10.0 10. 0 10.0 10.0 19. 0 19. 0 10. 0 Characteristics:
- the mechanical properties of the propellant composition at low temperatures can be improved.
- FIGS. 2 and 3 show that the propellant composition according to this invention has larger maximum stress and strain at maximum stress at temperatures ranging from 50 C. to 50 C. as compared with the propellant compositions known heretofore.
- Example 1 This example illustrates the effect of addition of amide compound with respect to a fuel binder obtained by curing a carboxyl-terminated polybutadiene (hereinafter referred to as CTPB) with bisphenol A glycidyl ether (a product of Shell, E828).
- CTPB carboxyl-terminated polybutadiene
- bisphenol A glycidyl ether a product of Shell, E828.
- the above-mentioned CTPB is obtained by carboxylating a liquid polybutadiene.
- FIG. '1 shows that the sample No. 2 to which amide compound is incorporated reaches a leveled hardness much earlier than sample No. 1 to which no amide compound is incorporated. Samples Nos. 3.8 to which amide compound was incorporated reached a leveled hardness as early as sample No. 2.
- Example 2 Various propellant compositions were prepared using the same CTPB as used in Example 1 according to the same procedures as described therein by varying the types of compounds having epoxy group or ethylene imine group thus varying the curing catalyst, to conduct the Tensile Test. The composition of the samples and the results of the test performed are shown in Table 2.
- Cross-linking agents are compounds having epoxy or ethylene imine group which may be further identified as follows:
- Q-l is a mixture of E828 and epoxide of fatty oil in a ratio of 1:1.
- Q-2 is a mixture of tris (methyl'aziridinyD-phosphine oxide and epoxide of fatty oil in a ratio of 2:1, and
- Q,3 is a mixture of tripropylene melamine and epoxide of fatty oil in a ratiqof 2:1 3
- 0-1 is the same catalyst as used in Example 1 and 0-2 is acetonate, urotropin and A101 in a ratio of 1:1:1.
- FIGS. 2 and 3 show that the propellant composition to which amide compound is incorporated has larger maximum stress and strain at maximum stress over a wide temperature region as compared with those of compositon to which no amide compound is added.
- Sample No. 10 was prepared repeatedly for 5 times according to this invention to see the reproducibility.
- the relative tolerance in the maximum stress and strain at maximum stress among these samples remained within the range of -5%, showing an excellent result.
- Example 3 Samples Nos. 17, 18, 19 and 20 were prepared according to the same procedures as described in Example 2. However, the CTPB used for samples Nos. 13 and 14 were replaced by butadiene-acrylic acid copolymer (h-ereinafter referred to as PBAA) and butadiene-acrylic .acid-acrylonitrile terpolymer (hereinafter referred to as PBAN) obtained by the radical initiated polymerization.
- PBAA butadiene-acrylic acid copolymer
- PBAN butadiene-acrylic .acid-acrylonitrile terpolymer
- a composite propellant consisting essentia ly of (a) a fuel binder comprising at least one liquid organic compound (i) containing a carboxyl group,
- said compound (i) being selected from the group consisting of a copolymer or a terpolymer obtained by polymerizing a vinyl compound, conjugated diene compound, unsaturated hydrocarbon compound or mixture thereof with an acrylic acid, a carboxylated homopolymer or copolymer of a conjugated diene compound or an aromatic vinyl compound, and a mixture of said compounds,
- an oxidizing agent the improvement characterized by having present in said propellant (d) an amide having at least one NHCO group per molecule and being represented by a formula selected from the group of formulae consisting of wherein R, R" and R are radicals selected from the group consisting of unsubstituted saturated and unsaturated hydrocarbon radicals having from 1 to about 30 carbon atoms and said radicals substituted with oxygen, nitrogen, sulfur, silicon, halogen or an organic'cyclic radical; B and B are the same or different and are NH or COOH; R is hydrogen or a radical defined by R, R" and R; l and n are Zero or whole numbers from 1 to 6, and m is zero or a whole number from 1 to 1000, and when l and n are both zero m is greater than zero and when l is zero R is only hydrogen.
- R, R" and R are radicals selected from the group consisting of unsubstituted saturated and unsaturated hydrocarbon radicals having from 1 to about 30 carbon atoms and said radicals
- composition of claim 1 wherein at least a member selected from the group consisting of a curing catalyst for said fuel binder, a combustion performance modifier, a plasticizer and a filler, is further incorporated in said propellant.
- a composite propellant consisting essentially of from about 10 to about 60 parts by weight of a fuel binder compound (i) of claim 1, a compound (ii) of claim 1, and 40-90 parts of an oxidizing agent, the improvement characterized by incorporating from about 0.01 to about 5% by weight of an amide (d) of claim 1 based on the weight of said propellant into an uncured fuel binder, removing bubbles from the resultant mix, and curing the resulting composition !by heating the same at a. temperature of from about 40 to about C.
- composition of claim 1 wherein said epoxy compound (ii) is selected from the group consisting of bisphenol A glyeidyl ether, 1-epoxy-3,4-epoxy-cyclohexane, polybutadiene polyepoxide, oleic acid glyceride epoxidate and fatty oil epoxidatt- 6.
- composition of claim .1 wherein said cyclic imine is selected from the group consisting of trismethylaziridinyl-phosphine oxide, trisaziridinyl-phosphine oxide, imineterminated polymer, phenyldimethylaziridinyl-phosphine oxide, tripropylene melamine, triethylene melamine, and 1 hexamethylene bisethylene urea.
- composition of claim 1 wherein the fuel binder is an ester-type fuel binder.
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Description
Nov. 4. 1969 .FIG.I
FIG.2
' FIGS MAXIMUM STRESS SHORE HARDNESS STRAIN AT MAXIMUM STRESS TADAMASA HARADA ET AL 3,47 C ARBOXY-TERMINATED COMPOSITE ROCKET PROPELLANT AND PROCESS FOR PRODUCING USING AN AMIDE ADDITIVE Filed D80. 20, 1967 NO. I
o l I 1 T l l I l I l O 2 4 6 8 IO I2 I4 I6 I8 2O CURING DAYS l l l I I -60 50 4O 30 20 IO O IO 20 3O 4O 5O MEASURI N6 TEMPERATURE IOO MEASURING TEMPERATURE United States Patent US. Cl. 149-19 7 Claims ABSTRACT OF THE DISCLOSURE A composite propellant consisting of a fuel binder mainly comprising liquid organic compounds containing carboxyl group, an epoxy group-containing compound and/or a cyclic imine groupcontaining compound, and anoxidizing agent characterized by having present in the propellant composition an amide compound.
There is also disclosed a process for producing the above-mentioned composite propellant.
BACKGROUND OF THE INVENTION This invention relates to a composite propellant (hereinafter referred to as prope1lant) and a process for producing the same, and, more particularly, it relates to an improvement in the mechanical properties of such propellant by incorporating a novel material thereinto.
Field of the invention There have been known heretofore propellants consisting of a fuel binder mainly comprising liquid organic compounds having carboxyl group in their molecules and epoxy group-containing compounds and/or cyclic imine group-containing compounds, and an organic or inorganic oxidizing agents.
The curing reaction of the fuel binders is described in Rubber Chemistry and Technology, p. 932, vol. 36 (1963) and the preparation of the propellant using these fuel binders is described in the specifications of US. Patent Nos. 3,147,161 and 3,149,009.
In general, the propellants are, after the production thereof followed by transportation and storing, combusted in rocket engines under a pressurized condition to utilize the total impulse generated at that time.
Throughout the series of these steps, the propellants are subjected to various static or dynamic stresses exerted thereon and the propellants must endure the deformation and destruction caused therefrom. Thus, the propellants are required to have a combination of excellent combustion performance and mechanical properties.
Although the mechanical properties of the propellants are variable by changing the type of fuel binder, the type and amount of oxidizing agent used and the type of modifier used to improve the combustion performance, the improvement in the mechanical properties of propellants is now chiefly relying upon the alteration of type of fuel binder used, since the type and amount of oxidizing agent and the type of modifier may not be changed due to the necessity for preserving the combustion performance of the propellants. Moreover, the mechanical "ice properties of propellants tend to be deteriorated because the propellants normally contain 40-90 parts by weight of powdered solid oxidizing agent.
The most conventional compound of liquid organic compounds containing carboxyl group which relate to the propellant of this invention is carboxylated polybutadiene.
The carboxylated polybutadiene mentioned above is a typical example of fuel binder for a propellant at present because it has advantages in that the propellant containing the same shows superior mechanical properties at low temperatures and delivers higher energy over the propellants using the conventional fuel binders such as polysulfide, polyurethane, etc.
However, the propellant containing carboxylated polybutadiene has a drawback in that it has poor mechanical properties at temperatures in the vicinity of room temperature. Thus, there have been exerted considerable efforts for eliminating the drawback accompanied by the propellant containing carboxylated polybutadiene and such efforts have been unsuccessful so far.
SUMMARY OF THE INVENTION It is, therefore, an object of this invention to provide a composite propellant having improved mechanical properties.
It is also another object of this invention to provide a process for producing a composite propellant having improved mechanical properties.
More porticularly, the object of this invention is to improve the mechanical properties of a propellant containing a fuel binder which is obtained by adding epoxy group-containing compound and/or cyclic imine groupcontaining compound to liquid organic compounds having carboxyl group in their molecules, and, if required, incorporating a catalyst, a plastizer and a filler into the resulting mixture, and curing the same by the reaction of carboxyl group with epoxy group and/or cyclic imine group. The fuel binder mentioned above may be referred to as ester-type fuel binders.
We have found thatthe object mentioned above can be fully accomplished by incorporating an amide compound into the conventional ester-type fuel binders known heretofore.
The mechanical properties of the propellant may be remarkably improved by the incorporation of an amide compound into the propellant composition at the time of preparing the same, preferably at the time of preparing the ester-type fuel binder.
The oxidizing agents which may be used in the propellant of this invention in the amounts ranging 40-90% by weight based on the total weight of the propellant can be any type of conventional organic or inorganic solid oxidizing agents. For example, perchlorates and nitrates of metals, ammonium or hydrazine; organic nitro compounds and addition products of perchloric acids of organic compounds may be used.
The fuel binders which may be used in the propellant composition of this invention are most preferably those having rubbery properties obtained by a polymerization reaction or a cross-linking reaction of a liquid organic compoundhaving not less than 2 carboxyl groups in its molecule with compound having epoxy group and/or compound having cyclic imine group.
The liquid organic compounds having carboxyl groups which may be used in the propellant composition of this invention include, copolymers or terpolymers obtained by polymerizing at least one of vinyl compounds such as methylmethacrylate, acryonitrile, vinyl chloride, vinylidene chloride, fiuoroethylene and styrene, conjugated diene compounds such as butadiene, isoprene and chloroprene, unsaturated hydrocarbon compounds such as ethylene, propylene and acetylene, with acrylic acids; organic compounds obtained by carboxylation of homopolymers or copolymers of conjugated diene compounds and aromatic vinyl compounds; and a mixture of two or more kinds thereof. Typical examples of the organic compound include carboxyl-terminated polybutadiene, polybutadieneacrylic acid copolymer, and butadiene/acrylic acid/acrylonitrile terpolymer.
Typical examples of organic compounds containing epoxy group which may be used in the propellant composition of this invention include bisphenol A glycidyl ether, 1-epoxy-3,4-epoxy-cyclohexane, polybutadiene polyepoxide, oleic acid glyceride cpoxidate and fatty oil epoxidates, and any organic compounds having at least 2 epoxy groups per a molecule thereof may be conveniently used.
Typical examples of compounds containing cyclic imine group which may be used in the propellant composition of this invention include trismethylaziridinyl-phosphine oxide, trisaziridinyl-phosphine oxide, imine-terminated polymer, phenyldimethylaziridinyl-phosphine oxide, tripropylene melamine, triethylene melamine, and hexamethylene bisethylene urea. Any organic compound having at least 2 cyclic imine groups such as ethylene imine and propylene imine groups per a molecule thereof may be conveniently used.
These epoxy group-containing compounds and cyclic imine group-containing compounds may be used either alone or in admixture with two or more kinds.
The epoxy group-containing compound or cyclic imine group-containing compound is used in an amount of more than 0.5 equivalent, preferably 0.8-5.0 equivalents, calculated for the epoxy or cyclic imine group based on carboxyl group of the liquid organic compound.
The amide compound newly incorporated thereinto has active hydrogen which reacts with these cyclic compounds. At times, the cyclic compound to react with carboxyl group is shorted due to the reaction mentioned above, thus, there is added 3.0 equivalents, preferably 0.21.0 equivalent, of epoxy group and/or cyclic imine group based on the total active hydrogen of the amide compound in order to replenish the shortened amount.
The epoxy group-containing compound and/or cyclic imine group-containing compound which react with the active hydrogen of amide compound, and those which react with carboxyl group of the liquid organic compound can be the same or different.
Amide compounds which may be used in the propellant composition of this invention are those having at least one NHCO group per a molecule thereof and generally having the following chemical structures:
wherein R, R, R and R' represent saturated or unsaturated hydrocarbon having 1-30 carbon atoms which may contain 0, N, S, Si, halogen and/or organo-cyclic compounds; B and B which may be the same or different represent NH; and/or COOH, l and n are values of 0-6, and m is a value of 0-1000, preferably 0400, most preferably 0-30, provided that m is not less than 1 when l and n are both zero, and the above-mentioned R may be H y hen l is zero, ega dless f he va ues of m an I! No particular restriction is imposed on the type of amide compounds so long as they have the chemical structure defined above. In general, the amide compounds may be easily and conveniently obtained by reacting organic amines at 70 to 300 C. in the conventional way with carboxyl group of all types of carboxylated compounds including saturated monocarboxylic acids such as acetic acid, propionic acid, butyric acid, valeric acid, capric acid, lauric acid, palmitic acid, and stearic acid; olefinic monocarboxylic acids such as acrylic acid, isocrotonic acid, crotonic acid, vinyl acetic acid, methacrylic acid, pentenoic acid and octenoic acid; acetylenic monocarboxylic acids such as propiolic acid, tetrolic acid, undecynoic acid and stearolic acid; diolefinic acids such as 2,4-pentadienoic acid, diallylacetic acid and 9,12-octadecadienoic acid; higher monocarboxylic acids such as linolenic acid and linoleic acid; halogen-substituted saturated or unsaturated monocarboxylic acids such as chloroacetic acid, iodoacetic acid, fiuoroacetic acid, bromoacetic acid, a-ChlOI'OprOplOtliC acid, p-chloropropionic acid, a-bromopropionic acid, B-bromopropionic acid, a-iodopropionic acid, p-iodopropionic acid, a,a-dichloropropionic acid, a,;8-dichloropropionic acid, a-chlorocapronic acid, a-chloroacrylic acid, a-bromoacrylic acid, fi-bromoacrylic acid, ,B-chloroacrylic acid, ot-chlorocrotonic acid, and B-chlorocrotonic acid; saturated or unsaturated dicarboxylic acids and halogen-substitutes thereof such as malonic acid, succinic acid, gultaric acid, adipic acid, pimelic acid, sebacic acid, azelaic acid, maleic acid, fumaric acid, itaconic acid, methylfumaric acid, acetylenic dicarboxylic acid and muconic acid; oxy acids such as malic acid, tartaric acid, citric acid, acetoacetic acid and lactic acid; cyclic carboxylic acids such as benzoic acid, cinnamic acid, salicyclic acid, gallic acid, phthalic acid, terephthalic acid; isophthalic acid, trimesic acid and dicarboxybiphenyl; and carboxylic acids containing halogen, oxygen, nitrogen and sulfur as represented by carboxylate compounds containing furan, pyran, thiophene, pyrol, pyridine and pyrimidine rings.
Since it is interminable to list all of these carboxylic acids and derivatives thereof, these enumerated above are only a part of examples, and acid chlorides, acid anhydrides and esters of these carboxylic acid may also be used.
No particular restriction is imposed on the type of amines to be reacted with carboxylic acid so long as they contain NH group. Although it is interminable to list all of these amines, a part of examples include saturated and unsaturated monoor poly-amines and oxyamines such as methylamine, propylamine, butylamine, hexylamine, octylamine, methylenediamine, ethylenediamine, tetramethylenediamine, hexamethylenediamine, triaminopropane, tris (2-aminoethyl) amine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, polyethylene imine, vinylamine, allylamine, propargylamine oxyhexylamine, aminopropan diol and aminopropanol; amino acids such as alanine, aminobutyric acid and glycine; cyclic amine or organo-cycle amines such as aniline, phenylenediamine, naphthylamine, diethoxydipropylamine silicate and melamine; amines such as hydrazine and urea; and halogen substituted derivatives thereof.
The amide compounds which may be used in the propellant composition of this invention may also be obtained by a reaction of isocyanates such as tolylene diisocyanate and hexamethylenediisocyanate with compounds having active hydrogen, such as alcohols, acids and amino acids, or halogenated alkylmagnesium. Moreover, they may also be obtained by reacting carbonyl compounds such as acetone and methylethylketone with ammonia.
There are many variety of reactions which afford the amide compounds and any of these reactions may be conveniently used.
The amide compound is incorporated into the propellant composition in an amount of (ml-5.00%, preferably -0.051.0% by weight based on the weight of the propellant, for a satisfactory result. The amounts either less than 0.01% or more than 5% lead to unsatisfactory result.
In order to fully manifest the effect on the improvement in the mechanical properties of the propellant composition by the incorporation of amide compounds thereinto, it is desirable that the amide compounds may be mixed with uncured fuel binder as uniformly as possible. However, there is required no particular art for the mixing process and a simple grating machine commonly used may be conveniently used. In fact, the composition can be mixed by hand, if the amount is small and if the amide compound is crushed sufficiently.
The amide compound is incorporated into the composition when uncured ester-type fuel binder, oxidizing agent and combustion performance modifier are mixed together, preferably when mixing the uncured ester-type fuel binder alone, and mixed well.
After the ester-type fuel binder, oxidizing agent and combustion perforance modifier are sufficiently mixed and bubbles present are removed, the resulting composition is cast into a desired shape and cured by heating at 40-150" C. for 1-300 hours to give the composite propellant of this invention.
As described above, the ester-type fuel binder consists of a major portion comprising liquid organic compound having carboxyl group, epoxy group-containing compound and/or cyclic imine group-containing compound and a minor portion comprising a curing catalyst, a plasticizer and a filler, which may be suitably selected and incorporated, if required.
Although the curing catalyst is normally unnecessary when a compound having cyclic imine group is used, it is often necessary when an epoxy compound is used as a major portion of a cross-linking agent. Any curing catalysts may be conveniently used in the propellant composition of this invention and no particular restriction is imposed on the type thereof.
Examples of these curing catalysts include metal salts of organic acids such as cobalt naphthenate, cobalt octoate and iron naphthenate; amino compounds such as urotropin, 2,4,6-tris-dimethylaminophenol, and ethylenediamine; inorganic salts and/ or oxides such as Fe(NO and ZnO; complex compounds or chelate compounds such as alcohol complex compounds of metal chlorides, methacrylatochromic chloride and ferrosacetylacetonate; and Lewis acids such as AlCl ,CuCl and SnCl These curing catalysts are normally incorporated into the fuel binder in an amount of 010% by weight.
While any plasticizers conventionally known may be conveniently used, the examples include organic acid esters such as dibutyl phthalate, diethyl phthalate and dioctyladipate; plasticizer containing phosphorus such as tricresyl phosphate; various process oils; formalic plasticizers; and liquid diene polymers.
These plasticizers are incorporated into the fuel binder in an amount of 0-5 0% by weight.
Likewise, any conventionally known fillers may be conveniently employed and the examples include carbon blacks known as channel black and furnace black; silicic anhydride and surface treated products thereof; and metal oxides such as ZnO and TiO These fillers may be incorporated into the fuel binder in an amount of 030% by weight.
The combustion performance modifiers which may be used in the propellant composition of this invention include powders of metals or alloys such as Be, B, Al, Si, Mg, Li and Na; organo-boron compounds and boron hydrides, and organic nitro compounds, all of which enumerated heretofore are effective for increasing the specific impulse of the resulting propellant; metal oxides such as PC3203, F6 0 CUCI'O4, K2CIO4, (NH4)2CT207, V205,
6 CuO, C00 and NiO, and metal salts such as LiF and SrCO which are effective for increasing or decreasing the combustion rate of propellant.
These combustion performance modifiers may be incorporated into the propellant composition in an amount of 0-40% by weight based on the weight of the propellant composition.
Although examples of the curing catalysts, plasticizers, fillers and combustion performance modifiers are given above, they have relatively little to do with this invention, regardless of the selection of the types or even the use thereof. Strictly speaking, in a given composition consisting of ester-type fuel binder, oxidizing agent and combustion performance modifier, if amide compound is incorporated thereinto, the mechanical properties of the propellant obtained therefrom is improved as compared with those of propellant obtained from the composition to which no amide compound is added.
The effect of this invention is so remarkable that the objects of this invention can be fully accomplished, and, furthermore, there can be obtained some additional effects as described in the following.
According to this invention, there is brought about a remarkable improvement in both maximum stress and strain at maximum stress of the resulting propellant composition in a tensile test which evaluates the mechanical properties thereof, e.g. increased by 1.5-3 times as compared with those of compositions known heretofore.
Referring to the accompanying drawings:
FIG. 1 illustrates the relationship between shore hardness and curing time.
FIG. 2 illustrates the relationships between the maximum stress and the measuring temperature in the propellant composition of this invention and that of prior art known heretofore. It is shown that the sample No. 9 which is a typical product obtained according to this invention has larger maximum stresses at respective temperatures as compared with the sample N0. 10 which is a conventional product known heretofore.
FIG. 3 shows the relationships between the strain at maximum stress and the measuring temperature in the propellant composition of this invention and that of prior art known heretofore. It is clearly shown in FIG. 3 that the sample No. 9 has larger strain at maximum stress at respective temperatures, thus, the addition of amide compound has remarkably improved the mechanical properties of the resulting propellant composition.
Although the reason for the improvement in the mechanical properties of the propellant composition by incorporation of amide compound thereinto has not been fully, understood, presumably the reasons are that the mechanical properties of the fuel binder have been improved and that the adhesive force between the fuel binder and oxidizing agent has been enhanced.
It is further presumed that these amide compounds react with epoxy groups and/or cyclic imine roups so that amide groups are bound to main chain or side chain of the 'fuel binder in the propellant composition by Way of a chemical bonding, thus, improving the mechanical properties of the resulting propellant composition.
In, accordance with this invention, there are obtained the following additional effects besides the main effect described above.
In the first place, the rate of curing of the composition is increased. Normally, the propellant of this type is obtained by mixing the respective ingredients, removing bubbles present and casting the resultant mixture and curing the shaped composition by heating. Thus, the increasing in the curing rate brings about advantages in that the time required in the curing process can be reduced, that the number of casting dies which are normally expensive can be reduced, and that the curing room can be made smaller. Hence, the manufacturing cost can be lowered because the manufacturing equipment is made simpler and smaller.
In general, when the rate of curing is increased, so-
called pot life, i.e. the period during which the pro-' cut were removed, the resulting mixture was cast into a desired shape and cured by heating at 70 C. for 5 days.
After the mix was cured, the Tensile Test as set forth in JIS-K6301 was performed at C. The results are shown in Table 1.
Also, in order to now the rate of curing of the present propellant composition in the curing process, the relationship between the Shore hardness and the curing days was measured.
An example of the results obtained is shown in FIG. 1. The Shore hardness was measured according to ASTM 1706-59T, Type A.
TABLE 1 Sample N 0 1 2 3 4 5 6 7 8 Composition: 1
CTPB 13. 8 13. 4 13. 4 13. 4 13. 4 13. 4 13. 6 13. 6 E828 2.3 2.7 2. 7 2.6 2.6 2.7 2.5 2. 5 C-1 2 9. 4 O. 4 0.4 0. 4 0. 4 0. 4 0. 4 0. 4 DBP. 3.5 3.5 8.5 3.5 3.5 2.5 2.5 3.5 Amide compound: a
Type- AM-l AM-2 AM-3 AM-4 AM-5 AM-G AM-7 Amount 0. 2 0. 2 0. 2 0. 2 0. 2 9. 2 9. 2 APCl-.. 80. 0 80. 0 80. 0 80. 0 80. 0 80. 0 80. 0 80. 0 Al powder- 19. 0 10.0 10. 0 10.0 10.0 19. 0 19. 0 10. 0 Characteristics:
Maximum stress (kgJcmJ) 5.0 10. 1 9. 5 8. 0 8. 5 9. 0 12. 1 11. 5 Strain at maximum stress (percent) 27 70 65 60 72 55 65 67 l Compositions are indicated in parts by weight.
2 O-1" is curing catalyst and a mixture of an isopropyl alcohol solution of methacrylatochromic chlorlde and pyridine in a ratio of 1:1 was used.
8 Amide compounds having the following structures were used:
AM-i- HOOCCHaOHiCO(NHCHaCHgNHCOCHzOHiCm NHCHiOHzNH,
Arr-2E In the third place, the mechanical properties can be improved.
In the third place, the mechanical properties of the propellant composition at low temperatures can be improved.
The accompanying drawings, FIGS. 2 and 3 show that the propellant composition according to this invention has larger maximum stress and strain at maximum stress at temperatures ranging from 50 C. to 50 C. as compared with the propellant compositions known heretofore.
DESCRIPTION OF THE PREFERRED EMBODIMENTS This invention may be explained more fully and practically in the following examples. It should not be construed, however, that these examples restrict this invention as they are given merely by way of illustration.
Example 1 This example illustrates the effect of addition of amide compound with respect to a fuel binder obtained by curing a carboxyl-terminated polybutadiene (hereinafter referred to as CTPB) with bisphenol A glycidyl ether (a product of Shell, E828). The above-mentioned CTPB is obtained by carboxylating a liquid polybutadiene.
There were first mixed CTPB, E828, dibutylphthalate (hereinafter referred to as DBP), a curing catalyst and an amide compound, together at room temperature, and to the resulting mixture were added ammonium perchlorate (hereinafter referred to as APCl) and powdered aluminium (hereinafter referred to as Al powder). After the ingredients were mixed well and bubbles pres- HOOCCHsCHzCO (NH(CH2 INHCOCHICH2CO)DNH(OHR)CNH H0oCCHiCHZNHCOCHZCHiCONHCHiCHiCOQH (C:HsO)zSi(OCzH5NHCOCHiCHaCOOH): (C2 s):N(CHz)iNHCOCH=CHCOOH As shown in Table 1, the incorporation of amide compound remarkably improves the mechanical properties, e.g. the maximum stress at 20 C. by 1.6-2.4 times, and the strain at maximum stress by 22.7 times as compared with those of propellant composition to which no amide compound is incorporated.
It can also be noted from the Table 1 that the eifect of incorporation of the amide compound becomes apparent with the amount of about 0.2% and that there is required only a very simple operation in which the amount of the epoxy group-containing compound added is somewhat adjusted depending upon the amount of active hydrogen contained in the amide compound.
FIG. '1 shows that the sample No. 2 to which amide compound is incorporated reaches a leveled hardness much earlier than sample No. 1 to which no amide compound is incorporated. Samples Nos. 3.8 to which amide compound was incorporated reached a leveled hardness as early as sample No. 2.
Example 2 Various propellant compositions were prepared using the same CTPB as used in Example 1 according to the same procedures as described therein by varying the types of compounds having epoxy group or ethylene imine group thus varying the curing catalyst, to conduct the Tensile Test. The composition of the samples and the results of the test performed are shown in Table 2.
In the instant example, an amide compound of the type AM-l as used in Example 1 was employed.
Samples Nos. 9 and 10 were subjected to the Tensile Test at temperature ranging from minus 50 C. to 50 C. and obtained the results as shown in FIGS. 2 and 3.
TABLE 2 Sample Nos 9 10 11 12 13 14 15 16 Composition: 1
CIPB 15. 0 14. 8 15.0 14. 8 16. 6 16. 4 16. 6 16. 4 Cross-linking agent: 2
Type Q-l Q-l Q-l Q-l Q-Z Q-2 Q-3 Q-3 Amount 2. 7 2. 6 2. 7 2. 6 1. 4 1. 3 1. 4 1. 3 Curing catalyst: 5
Type. C-1 0-1 0-2 0-2 0. 3 0. 8 0. 3 0. 3 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 0 0. 3 0 0. 3 0 0. 3 0 0. 3 80. 0 80. 0 80. 0 80. 0 80. 0 80. 0 80. 0 80. 0 A1 powder 10. 0 10.0 10. 0 10.0 10. 0 10.0 10. 0 10. 0 Maximum stress (kg/omfi) 6. 3 17. 1 4. 2 7. '11. 0 19. 1 8. 5 13. 2 Strain at maximum stress (percent) 58 22 59 58 25 1 Composition is indicated in parts by weight.
2 Cross-linking agents are compounds having epoxy or ethylene imine group which may be further identified as follows:
Q-l is a mixture of E828 and epoxide of fatty oil in a ratio of 1:1.
Q-2 is a mixture of tris (methyl'aziridinyD-phosphine oxide and epoxide of fatty oil in a ratio of 2:1, and
Q,3 is a mixture of tripropylene melamine and epoxide of fatty oil in a ratiqof 2:1 3 As for the curing catalyst, 0-1 is the same catalyst as used in Example 1 and 0-2 is acetonate, urotropin and A101 in a ratio of 1:1:1.
a mixture of ferrosacetyl Nora-The other symbols have the same meaning as defined in Example 1.
It can be seen from Table 2 that although the mechanical properties of the propellant composition are dependent upon the curing catalyst and cross-linking agent used, the mechanical properties are remarkably improved when amide compound is incorporated to the composition, i.e. the maximum stress and strain at maximum stress are increased by 1.5-2.7 times as compared with those of composition to which no amide compound is incorporated.
FIGS. 2 and 3 show that the propellant composition to which amide compound is incorporated has larger maximum stress and strain at maximum stress over a wide temperature region as compared with those of compositon to which no amide compound is added.
Sample No. 10 was prepared repeatedly for 5 times according to this invention to see the reproducibility. The relative tolerance in the maximum stress and strain at maximum stress among these samples remained within the range of -5%, showing an excellent result.
Example 3 Samples Nos. 17, 18, 19 and 20 were prepared according to the same procedures as described in Example 2. However, the CTPB used for samples Nos. 13 and 14 were replaced by butadiene-acrylic acid copolymer (h-ereinafter referred to as PBAA) and butadiene-acrylic .acid-acrylonitrile terpolymer (hereinafter referred to as PBAN) obtained by the radical initiated polymerization.
The Tensile Test was performed at 20 C. and obtained the results as shown in Table 3.
The results show that the mechanical properties of the propellant composition are improved by the incorporation of amide compound, even if the type of the compound containing carboxyl group is altered.
1 Composition is indicated in parts by weight. Nora-Other symbols have the same meaning as defined in Examples 1 and 2.
We claim:
1. In a composite propellant consisting essentia ly of (a) a fuel binder comprising at least one liquid organic compound (i) containing a carboxyl group,
said compound (i) being selected from the group consisting of a copolymer or a terpolymer obtained by polymerizing a vinyl compound, conjugated diene compound, unsaturated hydrocarbon compound or mixture thereof with an acrylic acid, a carboxylated homopolymer or copolymer of a conjugated diene compound or an aromatic vinyl compound, and a mixture of said compounds,
(b) a compound (ii) selected from the group consisting of an epoxy compound having at least two epoxy groups per molecule and a cyclic imine compound having at least two imine groups per molecule, and
(c) an oxidizing agent, the improvement characterized by having present in said propellant (d) an amide having at least one NHCO group per molecule and being represented by a formula selected from the group of formulae consisting of wherein R, R" and R are radicals selected from the group consisting of unsubstituted saturated and unsaturated hydrocarbon radicals having from 1 to about 30 carbon atoms and said radicals substituted with oxygen, nitrogen, sulfur, silicon, halogen or an organic'cyclic radical; B and B are the same or different and are NH or COOH; R is hydrogen or a radical defined by R, R" and R; l and n are Zero or whole numbers from 1 to 6, and m is zero or a whole number from 1 to 1000, and when l and n are both zero m is greater than zero and when l is zero R is only hydrogen.
2. The composition of claim 1 wherein at least a member selected from the group consisting of a curing catalyst for said fuel binder, a combustion performance modifier, a plasticizer and a filler, is further incorporated in said propellant.
3. The composition of claim 1 wherein said amide is present in an amount of 0.0l-S% by weight based upon the weight of the propellant.
4. In the manufacture of a composite propellant consisting essentially of from about 10 to about 60 parts by weight of a fuel binder compound (i) of claim 1, a compound (ii) of claim 1, and 40-90 parts of an oxidizing agent, the improvement characterized by incorporating from about 0.01 to about 5% by weight of an amide (d) of claim 1 based on the weight of said propellant into an uncured fuel binder, removing bubbles from the resultant mix, and curing the resulting composition !by heating the same at a. temperature of from about 40 to about C.
for from about 1 to about 300 hours.
5. The composition of claim 1 wherein said epoxy compound (ii) is selected from the group consisting of bisphenol A glyeidyl ether, 1-epoxy-3,4-epoxy-cyclohexane, polybutadiene polyepoxide, oleic acid glyceride epoxidate and fatty oil epoxidatt- 6. The composition of claim .1 wherein said cyclic imine is selected from the group consisting of trismethylaziridinyl-phosphine oxide, trisaziridinyl-phosphine oxide, imineterminated polymer, phenyldimethylaziridinyl-phosphine oxide, tripropylene melamine, triethylene melamine, and 1 hexamethylene bisethylene urea.
7. The composition of claim 1 wherein the fuel binder is an ester-type fuel binder.
References Cited UNITED STATES PATENTS 0 BENJAMIN R. PADGETI, Primary Examiner U.S. Cl. X.R.
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JP8312466 | 1966-12-20 |
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US692147A Expired - Lifetime US3476622A (en) | 1966-12-20 | 1967-12-20 | Carboxy-terminated composite rocket propellant and process for producing using an amide additive |
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Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3658608A (en) * | 1970-09-23 | 1972-04-25 | Nasa | Hydrazinium nitroformate propellant stabilized with nitroguanidine |
US3790416A (en) * | 1970-07-22 | 1974-02-05 | Hercules Inc | Composite propellant including (u) polyfunctional amine |
US3839106A (en) * | 1970-04-13 | 1974-10-01 | Poudres & Explosifs Ste Nale | Composite explosive with a carboxylic polydiolefin binder |
US3853645A (en) * | 1970-10-30 | 1974-12-10 | Us Navy | Composite propellant containing polytetrafluoroethylene powder and butyl or ethylene-propylene rubber |
USB287164I5 (en) * | 1969-09-30 | 1975-01-28 | ||
USB24017I5 (en) * | 1970-03-30 | 1975-01-28 | ||
USB78331I5 (en) * | 1970-09-01 | 1975-01-28 | ||
US3867354A (en) * | 1968-08-15 | 1975-02-18 | Mini Of Technology | Chromium salicylate catalyzed epoxide-carboxylic acid esterification |
US3881969A (en) * | 1969-11-25 | 1975-05-06 | Us Army | Solid propellant with hydroxy-terminated butadiene-ferrocenyl methyl acrylate copolymer binder |
US3886745A (en) * | 1972-12-27 | 1975-06-03 | Tokico Ltd | Hydraulic actuating device |
US3890173A (en) * | 1968-11-29 | 1975-06-17 | Dow Chemical Co | Solid propellant containing ethylene-carboxylic acid polymers cured with azeridine-based resins |
US3932241A (en) * | 1970-07-06 | 1976-01-13 | The United States Of America As Represented By The Secretary Of The Army | Propellants based on bis[N-(trinitroethyl)nitramino]ethane |
US3953258A (en) * | 1970-07-06 | 1976-04-27 | The United States Of America As Represented By The Secretary Of The Army | Polynitroamine oxidizer containing propellant |
US3957551A (en) * | 1971-12-17 | 1976-05-18 | The Dow Chemical Company | Propellant compositions having carboxyl containing binder cured with a glycidyl thioether |
US3969166A (en) * | 1975-05-21 | 1976-07-13 | The United States Of America As Represented By The Secretary Of The Army | Anti-erosive, solid rocket propellant compositions |
US3986909A (en) * | 1970-03-24 | 1976-10-19 | Atlantic Research Corporation | Boron-fuel-rich propellant compositions |
US3986910A (en) * | 1974-04-12 | 1976-10-19 | The United States Of America As Represented By The Secretary Of The Navy | Composite propellants containing critical pressure increasing additives |
US3993514A (en) * | 1972-01-27 | 1976-11-23 | Thiokol Corporation | Gas generating compositions containing ammonium sulfate acceleration force desensitizer |
US4000024A (en) * | 1975-10-17 | 1976-12-28 | The United States Of America As Represented By The Secretary Of The Air Force | Burning rate modifiers for solid propellants |
US4057441A (en) * | 1976-03-29 | 1977-11-08 | Thiokol Corporation | Solid propellant with burning rate catalyst |
US4065332A (en) * | 1972-12-19 | 1977-12-27 | Societe Nationale Des Poudres Et Explosifs | Hybrid propellant compositions |
US4078953A (en) * | 1975-09-17 | 1978-03-14 | The United States Of America As Represented By The Secretary Of The Army | Reignition suppressants for solid extinguishable propellants for use in controllable motors |
US4111729A (en) * | 1969-08-05 | 1978-09-05 | Paine T O Administrator Of The | Inhibited solid propellant composition containing beryllium hydride |
US4315830A (en) * | 1972-01-19 | 1982-02-16 | The United States Of America As Represented By The Secretary Of The Navy | Method for altering the characteristics of polymers |
US5139587A (en) * | 1978-05-12 | 1992-08-18 | Bayern-Chemie Gmbh | Composite solid propellant with a pulverulent metal/oxidizer agglomerate base |
US5143566A (en) * | 1978-05-12 | 1992-09-01 | Bayern-Chemie Gmbh | Composite solid propellant with a metal/inorganic fluoride admixture or a stable burning rate |
US6051087A (en) * | 1992-01-29 | 2000-04-18 | Cordant Technologies Inc. | Low smoke rocket motor liner compositions |
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US3147161A (en) * | 1961-06-19 | 1964-09-01 | Minnesota Mining & Mfg | Propellant composition cured with aziridinyl compounds |
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Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3867354A (en) * | 1968-08-15 | 1975-02-18 | Mini Of Technology | Chromium salicylate catalyzed epoxide-carboxylic acid esterification |
US3890173A (en) * | 1968-11-29 | 1975-06-17 | Dow Chemical Co | Solid propellant containing ethylene-carboxylic acid polymers cured with azeridine-based resins |
US4111729A (en) * | 1969-08-05 | 1978-09-05 | Paine T O Administrator Of The | Inhibited solid propellant composition containing beryllium hydride |
USB287164I5 (en) * | 1969-09-30 | 1975-01-28 | ||
US3914139A (en) * | 1969-09-30 | 1975-10-21 | Us Army | Propellant with very high burning rate acrylate polymer binder and NF plasticizer |
US3881969A (en) * | 1969-11-25 | 1975-05-06 | Us Army | Solid propellant with hydroxy-terminated butadiene-ferrocenyl methyl acrylate copolymer binder |
US3986909A (en) * | 1970-03-24 | 1976-10-19 | Atlantic Research Corporation | Boron-fuel-rich propellant compositions |
USB24017I5 (en) * | 1970-03-30 | 1975-01-28 | ||
US3914140A (en) * | 1970-03-30 | 1975-10-21 | Us Army | Propellant with mixed carboxyl polybutadiene and carboranyl methacrylate-butadiene-acrylic acid terpolymer as binder |
US3839106A (en) * | 1970-04-13 | 1974-10-01 | Poudres & Explosifs Ste Nale | Composite explosive with a carboxylic polydiolefin binder |
US3932241A (en) * | 1970-07-06 | 1976-01-13 | The United States Of America As Represented By The Secretary Of The Army | Propellants based on bis[N-(trinitroethyl)nitramino]ethane |
US3953258A (en) * | 1970-07-06 | 1976-04-27 | The United States Of America As Represented By The Secretary Of The Army | Polynitroamine oxidizer containing propellant |
US3790416A (en) * | 1970-07-22 | 1974-02-05 | Hercules Inc | Composite propellant including (u) polyfunctional amine |
US3914142A (en) * | 1970-09-01 | 1975-10-21 | Us Army | Solid propellants with biradical burning rate catalysts |
USB78331I5 (en) * | 1970-09-01 | 1975-01-28 | ||
US3658608A (en) * | 1970-09-23 | 1972-04-25 | Nasa | Hydrazinium nitroformate propellant stabilized with nitroguanidine |
US3853645A (en) * | 1970-10-30 | 1974-12-10 | Us Navy | Composite propellant containing polytetrafluoroethylene powder and butyl or ethylene-propylene rubber |
US3957551A (en) * | 1971-12-17 | 1976-05-18 | The Dow Chemical Company | Propellant compositions having carboxyl containing binder cured with a glycidyl thioether |
US4315830A (en) * | 1972-01-19 | 1982-02-16 | The United States Of America As Represented By The Secretary Of The Navy | Method for altering the characteristics of polymers |
US3993514A (en) * | 1972-01-27 | 1976-11-23 | Thiokol Corporation | Gas generating compositions containing ammonium sulfate acceleration force desensitizer |
US4065332A (en) * | 1972-12-19 | 1977-12-27 | Societe Nationale Des Poudres Et Explosifs | Hybrid propellant compositions |
US3886745A (en) * | 1972-12-27 | 1975-06-03 | Tokico Ltd | Hydraulic actuating device |
US3986910A (en) * | 1974-04-12 | 1976-10-19 | The United States Of America As Represented By The Secretary Of The Navy | Composite propellants containing critical pressure increasing additives |
US3969166A (en) * | 1975-05-21 | 1976-07-13 | The United States Of America As Represented By The Secretary Of The Army | Anti-erosive, solid rocket propellant compositions |
US4078953A (en) * | 1975-09-17 | 1978-03-14 | The United States Of America As Represented By The Secretary Of The Army | Reignition suppressants for solid extinguishable propellants for use in controllable motors |
US4000024A (en) * | 1975-10-17 | 1976-12-28 | The United States Of America As Represented By The Secretary Of The Air Force | Burning rate modifiers for solid propellants |
US4057441A (en) * | 1976-03-29 | 1977-11-08 | Thiokol Corporation | Solid propellant with burning rate catalyst |
US5139587A (en) * | 1978-05-12 | 1992-08-18 | Bayern-Chemie Gmbh | Composite solid propellant with a pulverulent metal/oxidizer agglomerate base |
US5143566A (en) * | 1978-05-12 | 1992-09-01 | Bayern-Chemie Gmbh | Composite solid propellant with a metal/inorganic fluoride admixture or a stable burning rate |
US6051087A (en) * | 1992-01-29 | 2000-04-18 | Cordant Technologies Inc. | Low smoke rocket motor liner compositions |
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