JP6658531B2 - ゴム架橋物 - Google Patents
ゴム架橋物 Download PDFInfo
- Publication number
- JP6658531B2 JP6658531B2 JP2016551974A JP2016551974A JP6658531B2 JP 6658531 B2 JP6658531 B2 JP 6658531B2 JP 2016551974 A JP2016551974 A JP 2016551974A JP 2016551974 A JP2016551974 A JP 2016551974A JP 6658531 B2 JP6658531 B2 JP 6658531B2
- Authority
- JP
- Japan
- Prior art keywords
- group
- carboxyl group
- nitrile rubber
- rubber
- 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.)
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- 229920001971 elastomer Polymers 0.000 title claims description 76
- 239000005060 rubber Substances 0.000 title claims description 76
- 229920000459 Nitrile rubber Polymers 0.000 claims description 98
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 82
- 239000000178 monomer Substances 0.000 claims description 68
- 238000004132 cross linking Methods 0.000 claims description 57
- 239000000203 mixture Substances 0.000 claims description 45
- 150000001875 compounds Chemical class 0.000 claims description 38
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 15
- 229910052740 iodine Inorganic materials 0.000 claims description 15
- 239000011630 iodine Substances 0.000 claims description 15
- 150000001993 dienes Chemical class 0.000 claims description 10
- 150000002825 nitriles Chemical class 0.000 claims description 10
- 150000001990 dicarboxylic acid derivatives Chemical class 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 2
- -1 cycloalkyl maleate Chemical compound 0.000 description 66
- 230000006835 compression Effects 0.000 description 30
- 238000007906 compression Methods 0.000 description 30
- 238000012360 testing method Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 17
- 125000004432 carbon atom Chemical group C* 0.000 description 14
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 10
- 238000013329 compounding Methods 0.000 description 10
- 239000000126 substance Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 239000003431 cross linking reagent Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 8
- 239000002253 acid Substances 0.000 description 7
- 238000005984 hydrogenation reaction Methods 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 6
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 6
- 125000001931 aliphatic group Chemical group 0.000 description 6
- 125000002947 alkylene group Chemical group 0.000 description 6
- 125000003118 aryl group Chemical group 0.000 description 6
- UTOVMEACOLCUCK-PLNGDYQASA-N butyl maleate Chemical compound CCCCOC(=O)\C=C/C(O)=O UTOVMEACOLCUCK-PLNGDYQASA-N 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229920006395 saturated elastomer Polymers 0.000 description 6
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- XSQHUYDRSDBCHN-UHFFFAOYSA-N 2,3-dimethyl-2-propan-2-ylbutanenitrile Chemical compound CC(C)C(C)(C#N)C(C)C XSQHUYDRSDBCHN-UHFFFAOYSA-N 0.000 description 4
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 4
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- 125000002723 alicyclic group Chemical group 0.000 description 4
- 150000001412 amines Chemical group 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- HNEGQIOMVPPMNR-IHWYPQMZSA-N citraconic acid Chemical compound OC(=O)C(/C)=C\C(O)=O HNEGQIOMVPPMNR-IHWYPQMZSA-N 0.000 description 4
- 238000009661 fatigue test Methods 0.000 description 4
- 239000004816 latex Substances 0.000 description 4
- 229920000126 latex Polymers 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 229920002554 vinyl polymer Polymers 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical group NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 150000007514 bases Chemical class 0.000 description 3
- 229940018557 citraconic acid Drugs 0.000 description 3
- 125000002993 cycloalkylene group Chemical group 0.000 description 3
- 150000004985 diamines Chemical class 0.000 description 3
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 3
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 150000003335 secondary amines Chemical class 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- ANFXTILBDGTSEG-UHFFFAOYSA-N 1-methyl-4,5-dihydroimidazole Chemical compound CN1CCN=C1 ANFXTILBDGTSEG-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- SDJHPPZKZZWAKF-UHFFFAOYSA-N 2,3-dimethylbuta-1,3-diene Chemical compound CC(=C)C(C)=C SDJHPPZKZZWAKF-UHFFFAOYSA-N 0.000 description 2
- OKVDGQVSUDTBJI-UHFFFAOYSA-N 2-methoxy-1-methylimidazole Chemical compound COC1=NC=CN1C OKVDGQVSUDTBJI-UHFFFAOYSA-N 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 2
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 2
- 239000006057 Non-nutritive feed additive Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 150000008064 anhydrides Chemical class 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 125000003710 aryl alkyl group Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- APEJMQOBVMLION-UHFFFAOYSA-N cinnamamide Chemical compound NC(=O)C=CC1=CC=CC=C1 APEJMQOBVMLION-UHFFFAOYSA-N 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 2
- 238000010556 emulsion polymerization method Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000001530 fumaric acid Substances 0.000 description 2
- XLYMOEINVGRTEX-UHFFFAOYSA-N fumaric acid monoethyl ester Natural products CCOC(=O)C=CC(O)=O XLYMOEINVGRTEX-UHFFFAOYSA-N 0.000 description 2
- NKHAVTQWNUWKEO-UHFFFAOYSA-N fumaric acid monomethyl ester Natural products COC(=O)C=CC(O)=O NKHAVTQWNUWKEO-UHFFFAOYSA-N 0.000 description 2
- 125000001188 haloalkyl group Chemical group 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 150000007522 mineralic acids Chemical class 0.000 description 2
- 150000002762 monocarboxylic acid derivatives Chemical class 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 239000004711 α-olefin Substances 0.000 description 2
- 125000003837 (C1-C20) alkyl group Chemical group 0.000 description 1
- PMJHHCWVYXUKFD-SNAWJCMRSA-N (E)-1,3-pentadiene Chemical compound C\C=C\C=C PMJHHCWVYXUKFD-SNAWJCMRSA-N 0.000 description 1
- XVOUMQNXTGKGMA-OWOJBTEDSA-N (E)-glutaconic acid Chemical compound OC(=O)C\C=C\C(O)=O XVOUMQNXTGKGMA-OWOJBTEDSA-N 0.000 description 1
- JELYYKOWJZVNKC-KHPPLWFESA-N (Z)-2-(cyclohexylmethyl)-3-ethylbut-2-enedioic acid Chemical compound C(C)/C(=C(/C(=O)O)CC1CCCCC1)/C(=O)O JELYYKOWJZVNKC-KHPPLWFESA-N 0.000 description 1
- YTALHUNHCVUXFZ-CLFYSBASSA-N (Z)-2-(cyclopentylmethyl)-3-methylbut-2-enedioic acid Chemical compound C/C(=C(/C(=O)O)CC1CCCC1)/C(=O)O YTALHUNHCVUXFZ-CLFYSBASSA-N 0.000 description 1
- ZJYCLOLEIIBKBW-SREVYHEPSA-N (Z)-4-(1-ethylcyclohexyl)oxy-4-oxobut-2-enoic acid Chemical compound OC(=O)\C=C/C(=O)OC1(CC)CCCCC1 ZJYCLOLEIIBKBW-SREVYHEPSA-N 0.000 description 1
- YXVCXHNQDCQCPE-PLNGDYQASA-N (Z)-4-(1-methylcyclopentyl)oxy-4-oxobut-2-enoic acid Chemical compound OC(=O)\C=C/C(=O)OC1(C)CCCC1 YXVCXHNQDCQCPE-PLNGDYQASA-N 0.000 description 1
- PAEPZZGRMGDVKQ-UHFFFAOYSA-N (cyclopentylamino)methanol Chemical compound OCNC1CCCC1 PAEPZZGRMGDVKQ-UHFFFAOYSA-N 0.000 description 1
- ZJYCLOLEIIBKBW-VOTSOKGWSA-N (e)-4-(1-ethylcyclohexyl)oxy-4-oxobut-2-enoic acid Chemical compound OC(=O)/C=C/C(=O)OC1(CC)CCCCC1 ZJYCLOLEIIBKBW-VOTSOKGWSA-N 0.000 description 1
- YXVCXHNQDCQCPE-SNAWJCMRSA-N (e)-4-(1-methylcyclopentyl)oxy-4-oxobut-2-enoic acid Chemical compound OC(=O)/C=C/C(=O)OC1(C)CCCC1 YXVCXHNQDCQCPE-SNAWJCMRSA-N 0.000 description 1
- UTOVMEACOLCUCK-SNAWJCMRSA-N (e)-4-butoxy-4-oxobut-2-enoic acid Chemical compound CCCCOC(=O)\C=C\C(O)=O UTOVMEACOLCUCK-SNAWJCMRSA-N 0.000 description 1
- ZMQWRASVUXJXGM-VOTSOKGWSA-N (e)-4-cyclohexyloxy-4-oxobut-2-enoic acid Chemical compound OC(=O)\C=C\C(=O)OC1CCCCC1 ZMQWRASVUXJXGM-VOTSOKGWSA-N 0.000 description 1
- QCAHYQPONLPBNQ-AATRIKPKSA-N (e)-4-cyclopentyloxy-4-oxobut-2-enoic acid Chemical compound OC(=O)\C=C\C(=O)OC1CCCC1 QCAHYQPONLPBNQ-AATRIKPKSA-N 0.000 description 1
- XLYMOEINVGRTEX-ONEGZZNKSA-N (e)-4-ethoxy-4-oxobut-2-enoic acid Chemical compound CCOC(=O)\C=C\C(O)=O XLYMOEINVGRTEX-ONEGZZNKSA-N 0.000 description 1
- CGEMPWFQTSQCKJ-SREVYHEPSA-N (z)-2-butyl-3-methylbut-2-enedioic acid Chemical compound CCCC\C(C(O)=O)=C(/C)C(O)=O CGEMPWFQTSQCKJ-SREVYHEPSA-N 0.000 description 1
- OIEZCGMZFDJVNR-NTMALXAHSA-N (z)-2-cycloheptyl-3-methylbut-2-enedioic acid Chemical compound OC(=O)C(/C)=C(C(O)=O)/C1CCCCCC1 OIEZCGMZFDJVNR-NTMALXAHSA-N 0.000 description 1
- CMKSFZOOZWTUBO-CLFYSBASSA-N (z)-2-cyclohexyl-3-methylbut-2-enedioic acid Chemical compound OC(=O)C(/C)=C(C(O)=O)/C1CCCCC1 CMKSFZOOZWTUBO-CLFYSBASSA-N 0.000 description 1
- GJFCMRHADFIVHU-VURMDHGXSA-N (z)-2-cyclopentyl-3-methylbut-2-enedioic acid Chemical compound OC(=O)C(/C)=C(C(O)=O)/C1CCCC1 GJFCMRHADFIVHU-VURMDHGXSA-N 0.000 description 1
- HVZKWAQLXHTHSG-PLNGDYQASA-N (z)-2-ethyl-3-methylbut-2-enedioic acid Chemical compound CC\C(C(O)=O)=C(/C)C(O)=O HVZKWAQLXHTHSG-PLNGDYQASA-N 0.000 description 1
- BDJSZICOAPUZNY-WAYWQWQTSA-N (z)-2-methyl-3-propylbut-2-enedioic acid Chemical compound CCC\C(C(O)=O)=C(/C)C(O)=O BDJSZICOAPUZNY-WAYWQWQTSA-N 0.000 description 1
- BVCYGKIVZPIAMH-FPLPWBNLSA-N (z)-4-cycloheptyloxy-4-oxobut-2-enoic acid Chemical compound OC(=O)\C=C/C(=O)OC1CCCCCC1 BVCYGKIVZPIAMH-FPLPWBNLSA-N 0.000 description 1
- ZMQWRASVUXJXGM-SREVYHEPSA-N (z)-4-cyclohexyloxy-4-oxobut-2-enoic acid Chemical compound OC(=O)\C=C/C(=O)OC1CCCCC1 ZMQWRASVUXJXGM-SREVYHEPSA-N 0.000 description 1
- QCAHYQPONLPBNQ-WAYWQWQTSA-N (z)-4-cyclopentyloxy-4-oxobut-2-enoic acid Chemical compound OC(=O)\C=C/C(=O)OC1CCCC1 QCAHYQPONLPBNQ-WAYWQWQTSA-N 0.000 description 1
- AYAUWVRAUCDBFR-ARJAWSKDSA-N (z)-4-oxo-4-propoxybut-2-enoic acid Chemical compound CCCOC(=O)\C=C/C(O)=O AYAUWVRAUCDBFR-ARJAWSKDSA-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
- GWYSWOQRJGLJPA-UHFFFAOYSA-N 1,1,2,2-tetrafluoropropyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(F)(F)C(C)(F)F GWYSWOQRJGLJPA-UHFFFAOYSA-N 0.000 description 1
- JNROUINNEHNBIZ-UHFFFAOYSA-N 1,1,3,3-tetraethylguanidine Chemical compound CCN(CC)C(=N)N(CC)CC JNROUINNEHNBIZ-UHFFFAOYSA-N 0.000 description 1
- KYVBNYUBXIEUFW-UHFFFAOYSA-N 1,1,3,3-tetramethylguanidine Chemical compound CN(C)C(=N)N(C)C KYVBNYUBXIEUFW-UHFFFAOYSA-N 0.000 description 1
- HJSYENHCQNNLAS-UHFFFAOYSA-N 1,2,4-trimethyl-4,5-dihydroimidazole Chemical compound CC1CN(C)C(C)=N1 HJSYENHCQNNLAS-UHFFFAOYSA-N 0.000 description 1
- AGMJWUBJIPQHBM-UHFFFAOYSA-N 1,2,4-trimethylimidazole Chemical compound CC1=CN(C)C(C)=N1 AGMJWUBJIPQHBM-UHFFFAOYSA-N 0.000 description 1
- OPNUROKCUBTKLF-UHFFFAOYSA-N 1,2-bis(2-methylphenyl)guanidine Chemical compound CC1=CC=CC=C1N\C(N)=N\C1=CC=CC=C1C OPNUROKCUBTKLF-UHFFFAOYSA-N 0.000 description 1
- QEIHVTKMBYEXPZ-UHFFFAOYSA-N 1,2-dimethyl-4,5-dihydroimidazole Chemical compound CN1CCN=C1C QEIHVTKMBYEXPZ-UHFFFAOYSA-N 0.000 description 1
- GIWQSPITLQVMSG-UHFFFAOYSA-N 1,2-dimethylimidazole Chemical compound CC1=NC=CN1C GIWQSPITLQVMSG-UHFFFAOYSA-N 0.000 description 1
- OWRCNXZUPFZXOS-UHFFFAOYSA-N 1,3-diphenylguanidine Chemical compound C=1C=CC=CC=1NC(=N)NC1=CC=CC=C1 OWRCNXZUPFZXOS-UHFFFAOYSA-N 0.000 description 1
- ILWJAOPQHOZXAN-UHFFFAOYSA-N 1,3-dithianyl Chemical group [CH]1SCCCS1 ILWJAOPQHOZXAN-UHFFFAOYSA-N 0.000 description 1
- BLHTXORQJNCSII-UHFFFAOYSA-N 1,4-dimethylimidazole Chemical compound CC1=CN(C)C=N1 BLHTXORQJNCSII-UHFFFAOYSA-N 0.000 description 1
- HQNBJNDMPLEUDS-UHFFFAOYSA-N 1,5-dimethylimidazole Chemical compound CC1=CN=CN1C HQNBJNDMPLEUDS-UHFFFAOYSA-N 0.000 description 1
- FOQIAXTVZDGFJG-UHFFFAOYSA-N 1-(1-methylcyclohexa-2,4-dien-1-yl)-4,5-dihydroimidazole Chemical compound C1CN=CN1C1(C)CC=CC=C1 FOQIAXTVZDGFJG-UHFFFAOYSA-N 0.000 description 1
- PNJBSYMHWQNFIU-UHFFFAOYSA-N 1-(ethoxymethyl)-2-methyl-4,5-dihydroimidazole Chemical compound CCOCN1CCN=C1C PNJBSYMHWQNFIU-UHFFFAOYSA-N 0.000 description 1
- LDWOFMOIGPNEAD-UHFFFAOYSA-N 1-(ethoxymethyl)-2-methylimidazole Chemical compound CCOCN1C=CN=C1C LDWOFMOIGPNEAD-UHFFFAOYSA-N 0.000 description 1
- HSCOLDQJZRZQMV-UHFFFAOYSA-N 1-Methyl-4-nitroimidazole Chemical compound CN1C=NC([N+]([O-])=O)=C1 HSCOLDQJZRZQMV-UHFFFAOYSA-N 0.000 description 1
- FBHPRUXJQNWTEW-UHFFFAOYSA-N 1-benzyl-2-methylimidazole Chemical compound CC1=NC=CN1CC1=CC=CC=C1 FBHPRUXJQNWTEW-UHFFFAOYSA-N 0.000 description 1
- KKKDZZRICRFGSD-UHFFFAOYSA-N 1-benzylimidazole Chemical compound C1=CN=CN1CC1=CC=CC=C1 KKKDZZRICRFGSD-UHFFFAOYSA-N 0.000 description 1
- CQDDDLREQHQBRR-UHFFFAOYSA-N 1-cyanoethyl prop-2-enoate Chemical compound N#CC(C)OC(=O)C=C CQDDDLREQHQBRR-UHFFFAOYSA-N 0.000 description 1
- FPFVPEGEWVRCGK-UHFFFAOYSA-N 1-ethenoxy-2-fluoroethane Chemical compound FCCOC=C FPFVPEGEWVRCGK-UHFFFAOYSA-N 0.000 description 1
- CFMTUIKADIKXIQ-UHFFFAOYSA-N 1-ethenoxy-3-fluoropropane Chemical compound FCCCOC=C CFMTUIKADIKXIQ-UHFFFAOYSA-N 0.000 description 1
- VGWWQZSCLBZOGK-UHFFFAOYSA-N 1-ethenyl-2-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=CC=CC=C1C=C VGWWQZSCLBZOGK-UHFFFAOYSA-N 0.000 description 1
- NYYVCPHBKQYINK-UHFFFAOYSA-N 1-ethyl-2-methylimidazole Chemical compound CCN1C=CN=C1C NYYVCPHBKQYINK-UHFFFAOYSA-N 0.000 description 1
- IWDFHWZHHOSSGR-UHFFFAOYSA-N 1-ethylimidazole Chemical compound CCN1C=CN=C1 IWDFHWZHHOSSGR-UHFFFAOYSA-N 0.000 description 1
- MCTWTZJPVLRJOU-UHFFFAOYSA-N 1-methyl-1H-imidazole Chemical compound CN1C=CN=C1 MCTWTZJPVLRJOU-UHFFFAOYSA-N 0.000 description 1
- OQJQPIWVCBJVAZ-UHFFFAOYSA-N 1-methyl-2-phenylimidazole Chemical compound CN1C=CN=C1C1=CC=CC=C1 OQJQPIWVCBJVAZ-UHFFFAOYSA-N 0.000 description 1
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- BMFPDUAGXOAWNF-UHFFFAOYSA-N n-heptylcyclopentanamine Chemical compound CCCCCCCNC1CCCC1 BMFPDUAGXOAWNF-UHFFFAOYSA-N 0.000 description 1
- KKTBUCVHSCATGB-UHFFFAOYSA-N n-methylcyclopentanamine Chemical compound CNC1CCCC1 KKTBUCVHSCATGB-UHFFFAOYSA-N 0.000 description 1
- UEXSPTQPNQWQAS-UHFFFAOYSA-N n-octylcyclooctanamine Chemical compound CCCCCCCCNC1CCCCCCC1 UEXSPTQPNQWQAS-UHFFFAOYSA-N 0.000 description 1
- FIIYZBVHFPHVKL-UHFFFAOYSA-N n-octylcyclopentanamine Chemical compound CCCCCCCCNC1CCCC1 FIIYZBVHFPHVKL-UHFFFAOYSA-N 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 125000002560 nitrile group Chemical group 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 125000001209 o-nitrophenyl group Chemical group [H]C1=C([H])C(*)=C(C([H])=C1[H])[N+]([O-])=O 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 125000006505 p-cyanobenzyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1C#N)C([H])([H])* 0.000 description 1
- 125000006503 p-nitrobenzyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1[N+]([O-])=O)C([H])([H])* 0.000 description 1
- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- PMJHHCWVYXUKFD-UHFFFAOYSA-N piperylene Natural products CC=CC=C PMJHHCWVYXUKFD-UHFFFAOYSA-N 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000010057 rubber processing Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 1
- 229960002447 thiram Drugs 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/14—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated containing elements other than carbon and hydrogen
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/22—Incorporating nitrogen atoms into the molecule
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L13/00—Compositions of rubbers containing carboxyl groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L15/00—Compositions of rubber derivatives
- C08L15/005—Hydrogenated nitrile rubber
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/12—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with nitriles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2309/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2309/02—Copolymers with acrylonitrile
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
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Description
JIS K6251に準拠して測定される、引張強度が15MPa以上、破断時の伸びが300%以上であるゴム架橋物が提供される。
本発明のゴム架橋物において、前記カルボキシル基含有ニトリルゴム(a)中における、カルボキシル基の含有量が5×10−4〜5×10−1ephrであることが好ましい。
本発明のゴム架橋物において、前記ニトリルゴム組成物中における、前記ジウレタン化合物(b)の含有量が、前記カルボキシル基含有ニトリルゴム(a)100重量部に対して、6.0〜12重量部であることが好ましい。
本発明のゴム架橋物において、前記ニトリルゴム組成物が、塩基性架橋促進剤(c)をさらに含有することが好ましい。
JIS K6251に準拠して測定される、引張強度が15MPa以上、破断時の伸びが300%以上であることを特徴とするものである。
まず、本発明のゴム架橋物を得るために用いられるニトリルゴム組成物について説明する。
本発明で用いるニトリルゴム組成物は、ヨウ素価が120以下であるカルボキシル基含有ニトリルゴム(a)と、後述する一般式(1)で表されるジウレタン化合物(b)とを含有する。
本発明で用いるヨウ素価が120以下であるカルボキシル基含有ニトリルゴム(a)(以下、単に「カルボキシル基含有ニトリルゴム(a)」ということがある。)は、α,β−エチレン性不飽和ニトリル単量体、カルボキシル基含有単量体および必要に応じて加えられる共重合可能なその他の単量体を共重合することにより得られる、ヨウ素価が120以下のゴムである。
本発明で用いるジウレタン化合物(b)は、下記一般式(1)で表される化合物である。ジウレタン化合物(b)は、上述したカルボキシル基含有ニトリルゴム(a)を架橋するための架橋剤として作用する。本発明においては、上述したカルボキシル基含有ニトリルゴム(a)に、ジウレタン化合物(b)を組み合わせて用いることで、得られるゴム架橋物の定伸長疲労特性および耐圧縮永久歪み性を向上させることができる。特に、本発明で用いるジウレタン化合物(b)は、架橋剤としての作用を示すアミン構造が、ウレタン構造の形態となっていることで、保護された構造となっており、このような構造を有することで、架橋前のニトリルゴム組成物の状態では安定に存在することができ、実際に架橋反応を行った際には、得られるゴム架橋物の架橋構造を高度に制御することができ、これにより、定伸長疲労特性および耐圧縮永久歪み性の向上に資するものであると考えられる。
これらのなかでも、フルオレニル含有基が好ましく、9−フルオレニルメチル基、9−(2−スルホ)フルオレニルメチル基、9−(2,7−ジブロモ)フルオレニルメチル基がより好ましく、9−フルオレニルメチル基がより好ましい。
また、上記一般式(1)中、X2は、−SO2−、または化学的な単結合であり、化学的な単結合であることが好ましい。
また、本発明で用いるニトリルゴム組成物は、上記した各成分に加えて、塩基性架橋促進剤(c)をさらに含有していることが好ましい。塩基性架橋促進剤(c)をさらに含有させることにより、ジウレタン化合物(b)による架橋をより適切に進行させることができ、これにより、本発明の効果がより一層顕著になる。
このようなゴムとしては、アクリルゴム、エチレン−アクリル酸共重合体ゴム、スチレン−ブタジエン共重合体ゴム、ポリブタジエンゴム、エチレン−プロピレン共重合体ゴム、エチレン−プロピレン−ジエン三元共重合体ゴム、エピクロロヒドリンゴム、ウレタンゴム、クロロプレンゴム、シリコーンゴム、フッ素ゴム、天然ゴム、ポリイソプレンゴムなどが挙げられる。
カルボキシル基含有ニトリルゴム(a)以外のゴムを配合する場合における、ニトリルゴム組成物中の配合量は、カルボキシル基含有ニトリルゴム(a)100重量部に対して、好ましくは30重量部以下であり、より好ましくは20重量部以下、さらに好ましくは10重量部以下である。
本発明のゴム架橋物は、上述したニトリルゴム組成物を架橋して得られるゴム架橋物である。
カルボキシル基含有ニトリルゴムのヨウ素価は、JIS K 6235に準じて測定した。
2mm角のカルボキシル基含有ニトリルゴム0.2gに、2−ブタノン100mLを加えて16時間攪拌した後、エタノール20mLおよび水10mLを加え、攪拌しながら水酸化カリウムの0.02N含水エタノール溶液を用いて、室温でチモールフタレインを指示薬とする滴定により、ゴム100gに対するカルボキシル基のモル数として求めた(単位はephr)。
カルボキシル基含有ニトリルゴムを構成する各単量体単位の含有割合は、以下の方法により測定した。
すなわち、マレイン酸モノn−ブチル単位の含有割合は、上記「カルボキシル基含有量」の測定方法により、水素化後のカルボキシル基含有ニトリルゴム100gに対するカルボキシル基のモル数を求め、求めたモル数をマレイン酸モノn−ブチル単位の量に換算することにより算出した。
1,3−ブタジエン単位(水素化された部分も含む)の含有割合は、水素添加反応前のカルボキシル基含有ニトリルゴムのヨウ素価を上記方法で測定することにより算出した。
アクリロニトリル単位の含有割合は、JIS K6384に従い、ケルダール法により、水素化後のカルボキシル含有ニトリルゴム中の窒素含量を測定することにより算出した。
カルボキシル基含有ニトリルゴムのムーニー粘度(ポリマームーニー)は、JIS K6300に従って測定した(単位は〔ML1+4、100℃〕)。
ニトリルゴム組成物を、縦15cm、横15cm、深さ0.2cmの金型に入れ、プレス圧10MPaで加圧しながら170℃で20分間プレス成形してシート状のゴム架橋物を得た。次いで、得られたゴム架橋物をギヤー式オーブンに移して170℃で4時間二次架橋し、得られたシート状のゴム架橋物をJIS3号形ダンベルで打ち抜いて試験片を作製した。そして、得られた試験片を用いて、JIS K6251に従い、ゴム架橋物の引張強度、および破断時の伸びを、また、JIS K6253に従い、デュロメータ硬さ試験機(タイプA)を用いてゴム架橋物の硬さを、それぞれ測定した。
上記常態物性の評価と同様にして得られたシート状のゴム架橋物をJIS3号形ダンベルで打ち抜いて試験片を作製した。そして、得られた試験片について、JIS K6260に規定されている屈曲疲労試験機を用い、試験片に0〜100%伸張が与えられるよう毎分300回、23℃で繰返し往復運動を行い、試験片が破断にいたる回数を測定した。なお、該試験は5個の試験片について行い、5個の試験片について行った結果を平均したものを、測定結果(試験片が破断にいたる回数)とした。破断にいたる回数が多いほど、定伸長疲労性に優れる。
金型を用いて、ニトリルゴム組成物を、温度170℃で20分間プレスすることにより架橋し、直径29mm、高さ12.5mmの円柱型のゴム架橋物を得た。次いで、得られたゴム架橋物を、ギヤー式オーブンにて、さらに170℃、4時間の条件で加熱して二次架橋させることにより、円柱型の試験片を得た。そして、得られた試験片を用いて、JIS K6262に従い、試験片を25%圧縮させた状態で、150℃の環境下に168時間置いた後、圧縮永久歪み(Disk圧縮永久歪み)を測定した。この値が小さいほど、耐圧縮永久歪み性に優れる。
外径30mm、リング径3mmの金型を用いて、ニトリルゴム組成物を170℃で20分間、プレス圧10MPaで架橋した後、170℃で4時間二次架橋を行うことにより、O−リング状の試験片を得た。そして、得られたO−リング状の試験片を用いて、O−リング状の試験片を挟んだ二つの平面間の距離をリング厚み方向に25%圧縮した状態で150℃にて168時間保持する条件で、JIS K6262に従って、圧縮永久歪み(O−リング圧縮永久歪み)を測定した。この値が小さいほど、耐圧縮永久歪み性に優れる。
金属製ボトルに、イオン交換水180部、濃度10重量%のドデシルベンゼンスルホン酸ナトリウム水溶液25部、アクリロニトリル37部、マレイン酸モノn−ブチル6部、t−ドデシルメルカプタン(分子量調整剤)0.75部の順に仕込み、内部の気体を窒素で3回置換した後、1,3−ブタジエン57部を仕込んだ。金属製ボトルを5℃に保ち、クメンハイドロパーオキサイド(重合開始剤)0.1部を仕込み、金属製ボトルを回転させながら16時間重合反応した。その後、濃度10重量%のハイドロキノン水溶液(重合停止剤)0.1部を加えて重合反応を停止し、金属製ボトルの内容物をガラス製フラスコに移し、引き続いて、水温60℃のロータリーエバポレータを用いて減圧下で残留単量体を除去し、アクリロニトリル−ブタジエン−マレイン酸モノn−ブチル共重合体ゴムのラテックス(固形分濃度約30重量%)を得た。
得られたカルボキシル基含有高飽和ニトリルゴム(a−1)のヨウ素価は10、カルボキシル基含有量は3.2×10−2ephr、ポリマームーニー粘度(ML1+4、100℃)は45であった。また、カルボキシル基含有高飽和ニトリルゴム(A−1)の組成は、アクリロニトリル単位36重量%、ブタジエン単位(水素化されたものも含む)58.5重量%、およびマレイン酸モノn−ブチル単位5.5重量%であった。
バンバリーミキサを用いて、合成例1で得られたカルボキシル基含有高飽和ニトリルゴム(a−1)100部に、FEFカーボンブラック(商品名「シーストSO」、東海カーボン社製)40部、トリメリット酸トリ−2−エチルヘキシル(商品名「アデカサイザーC−8」、ADEKA社製、可塑剤)5部、4,4’−ジ−(α,α−ジメチルベンジル)ジフェニルアミン(商品名「ノクラックCD」、大内新興化学社製、老化防止剤)1.5部、ステアリン酸1部、ポリオキシエチレンアルキルエーテルリン酸エステル(商品名「フォスファノールRL210」、東邦化学工業社製、加工助剤)1部を添加して、50℃で5分間混合した。次いで、得られた混合物を50℃のロールに移して、1,6−ビス[(9−フルオレニルメチル)カルバメート]ヘキサン(上記式(3)で表される化合物)8.3部、および1,8−ジアザビシクロ[5,4,0]−ウンデセン−7(DBU)(商品名「RHENOGRAN XLA−60(GE2014)」、RheinChemie社製、DBU60%(ジンクジアルキルジフォスフェイト塩になっている部分も含む)、塩基性架橋促進剤)4部を配合して、混練することにより、ニトリルゴム組成物を得た。
1,6−ビス[(9−フルオレニルメチル)カルバメート]ヘキサンの配合量を8.3部から6.6部に変更した以外は、実施例1と同様にして、ニトリルゴム組成物を調製し、同様に試験、評価を行った。結果を表1に示す。
1,6−ビス[(9−フルオレニルメチル)カルバメート]ヘキサンの配合量を8.3部から10部に変更した以外は、実施例1と同様にして、ニトリルゴム組成物を調製し、同様に試験、評価を行った。結果を表1に示す。
1,6−ビス[(9−フルオレニルメチル)カルバメート]ヘキサンの配合量を8.3部から4部に変更し、かつ、1,8−ジアザビシクロ[5,4,0]−ウンデセン−7(DBU)の配合量を4部から1部に変更した以外は、実施例1と同様にして、ニトリルゴム組成物を調製し、同様に試験、評価を行った。結果を表1に示す。
架橋剤として、1,6−ビス[(9−フルオレニルメチル)カルバメート]ヘキサン8.3部に代えて、ヘキサメチレンジアミンカルバメート(商品名「Diak#1」、デュポン社製)2.4部を使用した以外は、実施例1と同様にして、ニトリルゴム組成物を調製し、同様に試験、評価を行った。結果を表1に示す。
架橋剤として、1,6−ビス[(9−フルオレニルメチル)カルバメート]ヘキサン8.3部に代えて、ヘキサメチレンジアミンカルバメート(商品名「Diak#1」、デュポン社製)1.2部を使用した以外は、実施例1と同様にして、ニトリルゴム組成物を調製し、同様に試験、評価を行った。結果を表1に示す。
一方、ジウレタン化合物(b)の配合量が少なすぎる場合には、得られるゴム架橋物は、耐圧縮永久歪み性に劣る結果となった(比較例1)。
また、架橋剤として、ジウレタン化合物(b)の代わりに、ヘキサメチレンジアミンカルバメートを使用した場合には、その配合量を比較的多くした場合には、定伸長疲労試験における破断にいたる回数が10万回を下回り、定伸長疲労性に劣る結果となり(比較例2)、また、その配合量を比較的少なくした場合には、引張強度が低く、耐圧縮永久歪み性に劣る結果となった(比較例3)。なお、たとえば、比較例2では、ヘキサメチレンジアミンカルバメートの使用量を2.4部としているが、架橋剤としての作用を示すアミン構造の割合で考えると、その配合量は、実施例1と同等程度となっているといえる。
Claims (8)
- 前記カルボキシル基含有ニトリルゴム(a)が、α,β−エチレン性不飽和ニトリル単量体単位10〜60重量%、カルボキシル基含有単量体単位0.1〜20重量%、および共役ジエン単量体単位(水素化されている部分も含む)20〜89.9重量%を含有する請求項1または2に記載のゴム架橋物。
- 前記カルボキシル基含有単量体単位が、α,β−エチレン性不飽和ジカルボン酸モノエステル単量体単位である請求項3に記載のゴム架橋物。
- 前記カルボキシル基含有ニトリルゴム(a)中における、カルボキシル基の含有量が5×10−4〜5×10−1ephrである請求項1〜4のいずれかに記載のゴム架橋物。
- 前記ニトリルゴム組成物中における、前記ジウレタン化合物(b)の含有量が、前記カルボキシル基含有ニトリルゴム(a)100重量部に対して、6.0〜12重量部である請求項1〜5のいずれかに記載のゴム架橋物。
- 前記ニトリルゴム組成物が、塩基性架橋促進剤(c)をさらに含有する請求項1〜6のいずれかに記載のゴム架橋物。
- 請求項1〜7のいずれかに記載のゴム架橋物からなるホース。
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