WO2015080130A1 - ニトリル基含有高飽和共重合体ゴム組成物およびゴム架橋物 - Google Patents
ニトリル基含有高飽和共重合体ゴム組成物およびゴム架橋物 Download PDFInfo
- Publication number
- WO2015080130A1 WO2015080130A1 PCT/JP2014/081183 JP2014081183W WO2015080130A1 WO 2015080130 A1 WO2015080130 A1 WO 2015080130A1 JP 2014081183 W JP2014081183 W JP 2014081183W WO 2015080130 A1 WO2015080130 A1 WO 2015080130A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rubber
- highly saturated
- rubber composition
- nitrile
- containing highly
- Prior art date
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 121
- 239000005060 rubber Substances 0.000 title claims abstract description 121
- 229920006395 saturated elastomer Polymers 0.000 title claims abstract description 85
- 239000000203 mixture Substances 0.000 title claims abstract description 66
- 125000002560 nitrile group Chemical group 0.000 title claims abstract description 36
- 239000004014 plasticizer Substances 0.000 claims abstract description 34
- 150000002825 nitriles Chemical class 0.000 claims abstract description 15
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052740 iodine Inorganic materials 0.000 claims abstract description 13
- 239000011630 iodine Substances 0.000 claims abstract description 13
- 239000000178 monomer Substances 0.000 claims description 81
- 229920000459 Nitrile rubber Polymers 0.000 claims description 57
- 150000002148 esters Chemical class 0.000 claims description 45
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 27
- 229920000570 polyether Polymers 0.000 claims description 27
- 238000004132 cross linking Methods 0.000 claims description 17
- 125000004432 carbon atom Chemical group C* 0.000 claims description 16
- 239000003431 cross linking reagent Substances 0.000 claims description 13
- 150000001875 compounds Chemical class 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 11
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 10
- 150000002430 hydrocarbons Chemical group 0.000 claims description 8
- 238000007710 freezing Methods 0.000 claims description 7
- 230000008014 freezing Effects 0.000 claims description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- YZCKVEUIGOORGS-IGMARMGPSA-N Protium Chemical compound [1H] YZCKVEUIGOORGS-IGMARMGPSA-N 0.000 claims description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 abstract description 14
- 238000004073 vulcanization Methods 0.000 abstract description 9
- 150000002170 ethers Chemical class 0.000 abstract description 7
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 16
- 238000012360 testing method Methods 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 12
- 150000001993 dienes Chemical class 0.000 description 11
- -1 for example Chemical compound 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 229920000642 polymer Polymers 0.000 description 11
- 238000006116 polymerization reaction Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 10
- 238000003786 synthesis reaction Methods 0.000 description 10
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 10
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 9
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 9
- 238000005984 hydrogenation reaction Methods 0.000 description 9
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 8
- 229910052717 sulfur Inorganic materials 0.000 description 8
- 239000011593 sulfur Substances 0.000 description 8
- 230000003712 anti-aging effect Effects 0.000 description 7
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 239000004711 α-olefin Substances 0.000 description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 229940018557 citraconic acid Drugs 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 239000004816 latex Substances 0.000 description 6
- 229920000126 latex Polymers 0.000 description 6
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 150000001732 carboxylic acid derivatives Chemical group 0.000 description 5
- HNEGQIOMVPPMNR-IHWYPQMZSA-N citraconic acid Chemical compound OC(=O)C(/C)=C\C(O)=O HNEGQIOMVPPMNR-IHWYPQMZSA-N 0.000 description 5
- 238000013329 compounding Methods 0.000 description 5
- 235000011087 fumaric acid Nutrition 0.000 description 5
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 5
- 239000011976 maleic acid Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 235000014113 dietary fatty acids Nutrition 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000000194 fatty acid Substances 0.000 description 4
- 229930195729 fatty acid Natural products 0.000 description 4
- 150000004665 fatty acids Chemical class 0.000 description 4
- 239000001530 fumaric acid Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 150000001451 organic peroxides Chemical class 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 239000008149 soap solution Substances 0.000 description 4
- 229920002554 vinyl polymer Polymers 0.000 description 4
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000011243 crosslinked material Substances 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- UBRWPVTUQDJKCC-UHFFFAOYSA-N 1,3-bis(2-tert-butylperoxypropan-2-yl)benzene Chemical compound CC(C)(C)OOC(C)(C)C1=CC=CC(C(C)(C)OOC(C)(C)C)=C1 UBRWPVTUQDJKCC-UHFFFAOYSA-N 0.000 description 2
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 2
- YAJYJWXEWKRTPO-UHFFFAOYSA-N 2,3,3,4,4,5-hexamethylhexane-2-thiol Chemical compound CC(C)C(C)(C)C(C)(C)C(C)(C)S YAJYJWXEWKRTPO-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
- UJAWGGOCYUPCPS-UHFFFAOYSA-N 4-(2-phenylpropan-2-yl)-n-[4-(2-phenylpropan-2-yl)phenyl]aniline Chemical compound C=1C=C(NC=2C=CC(=CC=2)C(C)(C)C=2C=CC=CC=2)C=CC=1C(C)(C)C1=CC=CC=C1 UJAWGGOCYUPCPS-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
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- 241001441571 Hiodontidae Species 0.000 description 2
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- 230000001070 adhesive effect Effects 0.000 description 2
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- BMFMTNROJASFBW-UHFFFAOYSA-N 2-(furan-2-ylmethylsulfinyl)acetic acid Chemical compound OC(=O)CS(=O)CC1=CC=CO1 BMFMTNROJASFBW-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- CMPIGRYBIGUGTH-UHFFFAOYSA-N 2-bromoprop-2-enenitrile Chemical compound BrC(=C)C#N CMPIGRYBIGUGTH-UHFFFAOYSA-N 0.000 description 1
- OYUNTGBISCIYPW-UHFFFAOYSA-N 2-chloroprop-2-enenitrile Chemical compound ClC(=C)C#N OYUNTGBISCIYPW-UHFFFAOYSA-N 0.000 description 1
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 1
- GWZMWHWAWHPNHN-UHFFFAOYSA-N 2-hydroxypropyl prop-2-enoate Chemical compound CC(O)COC(=O)C=C GWZMWHWAWHPNHN-UHFFFAOYSA-N 0.000 description 1
- YXYJVFYWCLAXHO-UHFFFAOYSA-N 2-methoxyethyl 2-methylprop-2-enoate Chemical class COCCOC(=O)C(C)=C YXYJVFYWCLAXHO-UHFFFAOYSA-N 0.000 description 1
- HFCUBKYHMMPGBY-UHFFFAOYSA-N 2-methoxyethyl prop-2-enoate Chemical compound COCCOC(=O)C=C HFCUBKYHMMPGBY-UHFFFAOYSA-N 0.000 description 1
- BIISIZOQPWZPPS-UHFFFAOYSA-N 2-tert-butylperoxypropan-2-ylbenzene Chemical compound CC(C)(C)OOC(C)(C)C1=CC=CC=C1 BIISIZOQPWZPPS-UHFFFAOYSA-N 0.000 description 1
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-vinylpyridine Chemical compound C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-UHFFFAOYSA-N 0.000 description 1
- NEAHVGRDHLQWPP-UHFFFAOYSA-N 3-propoxycarbonylbut-3-enoic acid Chemical compound CCCOC(=O)C(=C)CC(O)=O NEAHVGRDHLQWPP-UHFFFAOYSA-N 0.000 description 1
- HLBZWYXLQJQBKU-UHFFFAOYSA-N 4-(morpholin-4-yldisulfanyl)morpholine Chemical compound C1COCCN1SSN1CCOCC1 HLBZWYXLQJQBKU-UHFFFAOYSA-N 0.000 description 1
- YSIUOTWIDXMASD-UHFFFAOYSA-N 4-[(3-ethenylphenyl)methoxy]-n-phenylaniline Chemical compound C=CC1=CC=CC(COC=2C=CC(NC=3C=CC=CC=3)=CC=2)=C1 YSIUOTWIDXMASD-UHFFFAOYSA-N 0.000 description 1
- LJMUXWGJPFMVAL-UHFFFAOYSA-N 4-[(4-ethenylphenyl)methoxy]-n-phenylaniline Chemical compound C1=CC(C=C)=CC=C1COC(C=C1)=CC=C1NC1=CC=CC=C1 LJMUXWGJPFMVAL-UHFFFAOYSA-N 0.000 description 1
- VVAAYFMMXYRORI-UHFFFAOYSA-N 4-butoxy-2-methylidene-4-oxobutanoic acid Chemical compound CCCCOC(=O)CC(=C)C(O)=O VVAAYFMMXYRORI-UHFFFAOYSA-N 0.000 description 1
- RTTAGBVNSDJDTE-UHFFFAOYSA-N 4-ethoxy-2-methylidene-4-oxobutanoic acid Chemical compound CCOC(=O)CC(=C)C(O)=O RTTAGBVNSDJDTE-UHFFFAOYSA-N 0.000 description 1
- YIDFNBQCPVYONT-JJDSELGRSA-N C(C)/C(=C(/C(=O)O)\CC1CCCCC1)/C(=O)O.C(\C(\C)=C/C(=O)O)(=O)O Chemical compound C(C)/C(=C(/C(=O)O)\CC1CCCCC1)/C(=O)O.C(\C(\C)=C/C(=O)O)(=O)O YIDFNBQCPVYONT-JJDSELGRSA-N 0.000 description 1
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- XLYMOEINVGRTEX-ARJAWSKDSA-N Ethyl hydrogen fumarate Chemical compound CCOC(=O)\C=C/C(O)=O XLYMOEINVGRTEX-ARJAWSKDSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 1
- 238000007696 Kjeldahl method Methods 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- HXKCUQDTMDYZJD-UHFFFAOYSA-N Methyl selenac Chemical compound CN(C)C(=S)S[Se](SC(=S)N(C)C)(SC(=S)N(C)C)SC(=S)N(C)C HXKCUQDTMDYZJD-UHFFFAOYSA-N 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000003429 antifungal agent Substances 0.000 description 1
- 229940121375 antifungal agent Drugs 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012662 bulk polymerization Methods 0.000 description 1
- UTOVMEACOLCUCK-PLNGDYQASA-N butyl maleate Chemical compound CCCCOC(=O)\C=C/C(O)=O UTOVMEACOLCUCK-PLNGDYQASA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- AFZSMODLJJCVPP-UHFFFAOYSA-N dibenzothiazol-2-yl disulfide Chemical compound C1=CC=C2SC(SSC=3SC4=CC=CC=C4N=3)=NC2=C1 AFZSMODLJJCVPP-UHFFFAOYSA-N 0.000 description 1
- JBSLOWBPDRZSMB-BQYQJAHWSA-N dibutyl (e)-but-2-enedioate Chemical compound CCCCOC(=O)\C=C\C(=O)OCCCC JBSLOWBPDRZSMB-BQYQJAHWSA-N 0.000 description 1
- JBSLOWBPDRZSMB-FPLPWBNLSA-N dibutyl (z)-but-2-enedioate Chemical compound CCCCOC(=O)\C=C/C(=O)OCCCC JBSLOWBPDRZSMB-FPLPWBNLSA-N 0.000 description 1
- OGVXYCDTRMDYOG-UHFFFAOYSA-N dibutyl 2-methylidenebutanedioate Chemical compound CCCCOC(=O)CC(=C)C(=O)OCCCC OGVXYCDTRMDYOG-UHFFFAOYSA-N 0.000 description 1
- BLKQQTCUGZJWLN-VAWYXSNFSA-N dicyclohexyl (e)-but-2-enedioate Chemical compound C1CCCCC1OC(=O)/C=C/C(=O)OC1CCCCC1 BLKQQTCUGZJWLN-VAWYXSNFSA-N 0.000 description 1
- BLKQQTCUGZJWLN-QXMHVHEDSA-N dicyclohexyl (z)-but-2-enedioate Chemical compound C1CCCCC1OC(=O)\C=C/C(=O)OC1CCCCC1 BLKQQTCUGZJWLN-QXMHVHEDSA-N 0.000 description 1
- SIISCSYILCBRQH-MDZDMXLPSA-N dicyclopentyl (e)-but-2-enedioate Chemical compound C1CCCC1OC(=O)/C=C/C(=O)OC1CCCC1 SIISCSYILCBRQH-MDZDMXLPSA-N 0.000 description 1
- SIISCSYILCBRQH-KTKRTIGZSA-N dicyclopentyl (z)-but-2-enedioate Chemical compound C1CCCC1OC(=O)\C=C/C(=O)OC1CCCC1 SIISCSYILCBRQH-KTKRTIGZSA-N 0.000 description 1
- ZWWQRMFIZFPUAA-UHFFFAOYSA-N dimethyl 2-methylidenebutanedioate Chemical compound COC(=O)CC(=C)C(=O)OC ZWWQRMFIZFPUAA-UHFFFAOYSA-N 0.000 description 1
- LDCRTTXIJACKKU-ONEGZZNKSA-N dimethyl fumarate Chemical compound COC(=O)\C=C\C(=O)OC LDCRTTXIJACKKU-ONEGZZNKSA-N 0.000 description 1
- 229960004419 dimethyl fumarate Drugs 0.000 description 1
- LDCRTTXIJACKKU-ARJAWSKDSA-N dimethyl maleate Chemical compound COC(=O)\C=C/C(=O)OC LDCRTTXIJACKKU-ARJAWSKDSA-N 0.000 description 1
- CGBYBGVMDAPUIH-ARJAWSKDSA-N dimethylmaleic acid Chemical compound OC(=O)C(/C)=C(/C)C(O)=O CGBYBGVMDAPUIH-ARJAWSKDSA-N 0.000 description 1
- PXJJSXABGXMUSU-UHFFFAOYSA-N disulfur dichloride Chemical compound ClSSCl PXJJSXABGXMUSU-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- QRGLHPKCXDINKY-UHFFFAOYSA-N ethenyl 2,3,4,5,6-pentafluorobenzoate Chemical compound FC1=C(F)C(F)=C(C(=O)OC=C)C(F)=C1F QRGLHPKCXDINKY-UHFFFAOYSA-N 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 229940050411 fumarate Drugs 0.000 description 1
- 150000002238 fumaric acids Chemical class 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- PBOSTUDLECTMNL-UHFFFAOYSA-N lauryl acrylate Chemical compound CCCCCCCCCCCCOC(=O)C=C PBOSTUDLECTMNL-UHFFFAOYSA-N 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- SINFYWWJOCXYFD-UHFFFAOYSA-N methoxymethyl prop-2-enoate Chemical compound COCOC(=O)C=C SINFYWWJOCXYFD-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- NKHAVTQWNUWKEO-IHWYPQMZSA-N methyl hydrogen fumarate Chemical compound COC(=O)\C=C/C(O)=O NKHAVTQWNUWKEO-IHWYPQMZSA-N 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229940074369 monoethyl fumarate Drugs 0.000 description 1
- NKHAVTQWNUWKEO-NSCUHMNNSA-N monomethyl fumarate Chemical compound COC(=O)\C=C\C(O)=O NKHAVTQWNUWKEO-NSCUHMNNSA-N 0.000 description 1
- 229940005650 monomethyl fumarate Drugs 0.000 description 1
- GFSJJVJWCAMZEV-UHFFFAOYSA-N n-(4-anilinophenyl)-2-methylprop-2-enamide Chemical compound C1=CC(NC(=O)C(=C)C)=CC=C1NC1=CC=CC=C1 GFSJJVJWCAMZEV-UHFFFAOYSA-N 0.000 description 1
- HKLPOBRVSAUJSG-UHFFFAOYSA-N n-(4-anilinophenyl)prop-2-enamide Chemical compound C1=CC(NC(=O)C=C)=CC=C1NC1=CC=CC=C1 HKLPOBRVSAUJSG-UHFFFAOYSA-N 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- QYZLKGVUSQXAMU-UHFFFAOYSA-N penta-1,4-diene Chemical compound C=CCC=C QYZLKGVUSQXAMU-UHFFFAOYSA-N 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
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- PMJHHCWVYXUKFD-UHFFFAOYSA-N piperylene Natural products CC=CC=C PMJHHCWVYXUKFD-UHFFFAOYSA-N 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- AHIHJODVQGBOND-UHFFFAOYSA-M propan-2-yl carbonate Chemical compound CC(C)OC([O-])=O AHIHJODVQGBOND-UHFFFAOYSA-M 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- FWMUJAIKEJWSSY-UHFFFAOYSA-N sulfur dichloride Chemical compound ClSCl FWMUJAIKEJWSSY-UHFFFAOYSA-N 0.000 description 1
- 229940052367 sulfur,colloidal Drugs 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 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
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
- C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
Definitions
- the present invention relates to a nitrile group-containing highly saturated copolymer rubber composition that provides a rubber cross-linked product having excellent vulcanization speed and excellent heat resistance and cold resistance, and rubber cross-linking obtained by cross-linking the composition. Related to things.
- nitrile group-containing highly saturated copolymer rubber (also referred to as “highly saturated nitrile rubber”, which includes hydrogenated nitrile rubber) is known as a rubber excellent in oil resistance, heat resistance and ozone resistance.
- the cross-linked product is used for various rubber materials for automobiles such as belts, hoses, gaskets, packings, oil seals and the like.
- miniaturization and higher output of automobile engines have been progressed, and in order to cope with such a situation, the nitrile group-containing highly saturated copolymer rubber used for this is also required to have further improved heat resistance. It is like that.
- the use in cold regions such as Scandinavia and Russia has been increasing, and further improvement in cold resistance has been demanded.
- Patent Document 1 the content of each monomer unit bonded in the copolymer chain is (1) 10 to 40% by weight of unsaturated nitrile monomer unit, and (2) unsaturated carboxylic acid unit. 1 to 40% by weight of acid ester monomer unit, (3) 20% by weight or less of conjugated diene monomer unit, (4) hydrogenated conjugated diene monomer unit, remaining and monomer unit Nitrile group-containing highly saturated, wherein the total of (1) and monomer unit (2) is 30 to 50% by weight and the total of monomer unit (3) and monomer unit (4) is 50 to 70% by weight
- a rubber composition having improved cold resistance comprising a copolymer rubber and a compounding agent is disclosed.
- the rubber cross-linked product obtained by using the rubber composition disclosed in Patent Document 1 has moderately improved cold resistance, but has insufficient heat resistance, and further improves heat resistance and cold resistance. Was desired.
- the present invention has been made in view of such a situation, and a nitrile group-containing highly saturated copolymer rubber composition that gives a rubber cross-linked product that is excellent in vulcanization speed and has excellent heat resistance and cold resistance, and the composition
- the object is to provide a rubber cross-linked product obtained by cross-linking the product.
- the present inventors have used a rubber containing a (meth) acrylic acid ester monomer unit as a nitrile group-containing highly saturated copolymer rubber, and this is used as an ether.
- a rubber composition obtained by combining with a polyetherester plasticizer having a structural unit in which three or more compounds are connected is a rubber cross-linked product excellent in vulcanization speed and excellent in heat resistance and cold resistance. As a result, the present invention has been completed.
- a nitrile group-containing highly saturated copolymer having an ⁇ , ⁇ -ethylenically unsaturated nitrile monomer unit and a (meth) acrylate monomer unit and having an iodine value of 120 or less.
- a nitrile group-containing highly saturated copolymer rubber composition comprising a combined rubber (A) and a polyether ester plasticizer (B) having a structural unit in which three or more ether compounds are linked.
- the molecular weight of the polyether ester plasticizer (B) is 600 to 5,000.
- the polyether ester plasticizer (B) is a compound represented by the following general formula (1).
- each R 1 is independently a hydrogen atom or a hydrocarbon group having 1 to 350 carbon atoms
- each R 2 is independently a hydrogen atom or 1 to 350 carbon atoms.
- n is an integer of 3 to 100.
- the polyether ester plasticizer (B) has a viscosity of 15 to 200 mPa ⁇ s / 25 ° C., a freezing point of 10 to ⁇ 20 ° C., and an SP value of 7 to 11 (cal / cm 3 ) 1/2 . is there.
- the blending amount of the polyether ester plasticizer (B) is 1 to 30 parts by weight with respect to 100 parts by weight of the highly saturated nitrile rubber (A).
- blending a crosslinking agent with one of the said nitrile group containing highly saturated copolymer rubber compositions is provided. Furthermore, according to this invention, the rubber crosslinked material formed by bridge
- a nitrile group-containing highly saturated copolymer rubber composition that gives a rubber cross-linked product having excellent vulcanization speed and excellent heat resistance and cold resistance, and obtained by cross-linking the composition.
- a rubber cross-linked product having excellent heat resistance and cold resistance is provided.
- Nitrile group-containing highly saturated copolymer rubber composition comprises an ⁇ , ⁇ -ethylenically unsaturated nitrile monomer unit and a (meth) acrylic acid ester monomer.
- Nitrile group-containing highly saturated copolymer rubber (A) The nitrile group-containing highly saturated copolymer rubber (A) used in the present invention (hereinafter sometimes referred to as “highly saturated nitrile rubber (A)”) is an ⁇ , ⁇ -ethylenically unsaturated nitrile monomer unit. And a rubber having a (meth) acrylic acid ester monomer unit and an iodine value of 120 or less.
- the ⁇ , ⁇ -ethylenically unsaturated nitrile monomer forming the ⁇ , ⁇ -ethylenically unsaturated nitrile monomer unit is not particularly limited as long as it is an ⁇ , ⁇ -ethylenically unsaturated compound having a nitrile group.
- examples thereof include acrylonitrile; ⁇ -halogenoacrylonitrile such as ⁇ -chloroacrylonitrile and ⁇ -bromoacrylonitrile; and ⁇ -alkylacrylonitrile such as methacrylonitrile.
- the ⁇ , ⁇ -ethylenically unsaturated nitrile monomer may be used alone or in combination of two or more. Among these, acrylonitrile and methacrylonitrile are preferable.
- the content of the ⁇ , ⁇ -ethylenically unsaturated nitrile monomer unit is preferably 5 to 50% by weight, more preferably 10 to 10%, based on all monomer units constituting the highly saturated nitrile rubber (A). It is 40% by weight, more preferably 10-30% by weight. If the content of the ⁇ , ⁇ -ethylenically unsaturated nitrile monomer unit is too small, the oil resistance of the resulting rubber cross-linked product may be lowered, and conversely if too much, the cold resistance may be lowered. is there.
- (meth) acrylic acid ester monomer forming a (meth) acrylic acid ester monomer unit meaning “acrylic acid ester monomer unit and / or methacrylic acid ester monomer unit”; hereinafter the same).
- an ester of (meth) acrylic acid for example, carbon number such as methyl acrylate, ethyl acrylate, n-butyl acrylate, n-dodecyl acrylate, methyl methacrylate, ethyl methacrylate, etc.
- (meth) acrylic acid hydroxyalkyl ester having a hydroxyalkyl group having 1 to 12 carbon atoms The (meth) acrylic acid ester monomer may be used alone or in combination of two or more. Among these, (meth) acrylic acid alkyl ester having an alkyl group having 1 to 18 carbon atoms is preferable since the effect of improving the cold resistance of the resulting rubber cross-linked product is large, and an alkyl group having 2 to 8 carbon atoms is preferable. (Meth) acrylic acid alkyl ester is more preferable, and n-butyl acrylate is particularly preferable.
- the content of the (meth) acrylate monomer unit is preferably 1 to 60% by weight, more preferably 10 to 50% by weight, based on all monomer units constituting the highly saturated nitrile rubber (A). More preferably, it is 20 to 50% by weight. If the content of the (meth) acrylic acid ester monomer unit is too small, the cold resistance of the resulting rubber cross-linked product may be lowered. Conversely, if the content is too large, the oil resistance may be lowered.
- the highly saturated nitrile rubber (A) used in the present invention includes a diene monomer unit and a (meth) acrylic acid ester monomer unit in addition to the ⁇ , ⁇ -ethylenically unsaturated nitrile monomer unit and the (meth) acrylate monomer unit. It preferably has an ⁇ -olefin monomer unit. Thereby, the rubber elasticity of the rubber crosslinked material obtained can be improved.
- the diene monomer forming the diene monomer unit include 4 or more carbon atoms such as 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, and 1,3-pentadiene. And conjugated diene monomers such as 1,4-pentadiene, 1,4-hexadiene and the like. Of these, conjugated diene monomers are preferred, and 1,3-butadiene is more preferred.
- the ⁇ -olefin monomer forming the ⁇ -olefin monomer unit is preferably one having 2 to 12 carbon atoms, specifically, ethylene, propylene, 1-butene, 4-methyl-1-pentene. , 1-hexene, 1-octene and the like.
- the content ratio thereof is preferably 35 with respect to the entire highly saturated nitrile rubber (A). It is -94 wt%, more preferably 40-80 wt%, still more preferably 40-70 wt%. If the content of the diene monomer unit and / or ⁇ -olefin monomer unit is too small, the rubber elasticity of the resulting rubber cross-linked product may be lowered. Conversely, if the content is too large, the heat resistance and chemical resistance may be reduced. Stability can be compromised.
- the highly saturated nitrile rubber (A) used in the present invention includes an ⁇ , ⁇ -ethylenically unsaturated nitrile monomer, a (meth) acrylic acid ester monomer, a diene monomer and / or an ⁇ -olefin. It can contain other monomer units copolymerizable with the monomer.
- Such other monomers include ⁇ , ⁇ -ethylenically unsaturated dicarboxylic acid monoester monomer, ⁇ , ⁇ -ethylenically unsaturated dicarboxylic acid diester monomer, ⁇ , ⁇ -ethylenically unsaturated Monocarboxylic acid monomer, ⁇ , ⁇ -ethylenically unsaturated polyvalent carboxylic acid monomer, ⁇ , ⁇ -ethylenically unsaturated polyvalent carboxylic acid anhydride monomer, aromatic vinyl monomer, fluorine-containing Examples include vinyl monomers and copolymerizable anti-aging agents.
- Examples of the ⁇ , ⁇ -ethylenically unsaturated dicarboxylic acid monoester monomer include maleic acid monoalkyl esters such as monomethyl maleate, monoethyl maleate, monopropyl maleate, and mono n-butyl maleate; Maleic acid monocycloalkyl esters such as cyclopentyl, monocyclohexyl maleate and monocycloheptyl maleate; monoalkyl cyclomaleates such as monomethylcyclopentyl maleate and monoethylcyclohexyl maleate; monomethyl fumarate, monoethyl fumarate, fumarate Monoalkyl esters of fumaric acid such as monopropyl acid and mono-n-butyl fumarate; monocyclopentyl fumarate, monocyclohexyl fumarate, monocycloheptyl fumarate, etc.
- maleic acid monoalkyl esters such as monomethyl maleate, monoethyl maleate
- Examples of ⁇ , ⁇ -ethylenically unsaturated dicarboxylic acid diester monomers include maleic acid dialkyl esters such as dimethyl maleate and di-n-butyl maleate; fumaric acids such as dimethyl fumarate and di-n-butyl fumarate Dialkyl esters; maleic acid dicycloalkyl esters such as dicyclopentyl maleate and dicyclohexyl maleate; dicycloalkyl esters such as dicyclopentyl fumarate and dicyclohexyl fumarate; itacones such as dimethyl itaconate and di-n-butyl itaconate Acid dialkyl ester: Itaconic acid dicycloalkyl ester such as itaconic acid dicyclohexyl;
- Examples of the ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acid monomer include acrylic acid, methacrylic acid, and crotonic acid.
- Examples of the ⁇ , ⁇ -ethylenically unsaturated polyvalent carboxylic acid monomer include itaconic acid, fumaric acid and maleic acid.
- Examples of the ⁇ , ⁇ -ethylenically unsaturated polyvalent carboxylic acid anhydride monomer include maleic anhydride.
- Examples of the aromatic vinyl monomer include styrene, ⁇ -methylstyrene, vinyl pyridine and the like.
- fluorine-containing vinyl monomers examples include fluoroethyl vinyl ether, fluoropropyl vinyl ether, o-trifluoromethyl styrene, vinyl pentafluorobenzoate, difluoroethylene, and tetrafluoroethylene.
- copolymerizable anti-aging agents examples include N- (4-anilinophenyl) acrylamide, N- (4-anilinophenyl) methacrylamide, N- (4-anilinophenyl) cinnamamide, N- (4-anilino).
- Examples include phenyl) crotonamide, N-phenyl-4- (3-vinylbenzyloxy) aniline, N-phenyl-4- (4-vinylbenzyloxy) aniline and the like.
- the content of other monomer units is preferably 50% by weight or less, more preferably 40% by weight or less, and still more preferably 10% by weight with respect to all monomer units constituting the highly saturated nitrile rubber (A). % Or less.
- the highly saturated nitrile rubber (A) used in the present invention has an iodine value of 120 or less, preferably 80 or less, more preferably 25 or less, and still more preferably 20 or less.
- the iodine value of the highly saturated nitrile rubber (A) is too high, the heat resistance and ozone resistance of the resulting rubber cross-linked product may be lowered.
- the polymer Mooney viscosity (ML 1 + 4 , 100 ° C.) of the highly saturated nitrile rubber (A) used in the present invention is preferably 15 to 200, more preferably 20 to 150, still more preferably 30 to 120. If the polymer Mooney viscosity of the highly saturated nitrile rubber (A) is too low, the mechanical properties of the resulting rubber cross-linked product may be reduced. Conversely, if the polymer Mooney viscosity is too high, processing of the highly saturated nitrile group-containing highly saturated copolymer rubber composition may occur. May be reduced.
- the production method of the highly saturated nitrile rubber (A) used in the present invention is not particularly limited.
- ⁇ , ⁇ -ethylenically unsaturated nitrile monomer, (meth) acrylic acid ester monomer, diene monomer A method of copolymerizing a monomer and / or an ⁇ -olefin monomer, and other monomers copolymerizable with these added as necessary is convenient and preferable.
- the polymerization method any of the known emulsion polymerization method, suspension polymerization method, bulk polymerization method and solution polymerization method can be used, but the emulsion polymerization method is preferable because the polymerization reaction can be easily controlled.
- the hydrogenation method is not particularly limited, and a known method may be employed.
- Polyether ester plasticizer (B) having a structural unit formed by connecting three or more ether compounds The polyether ester plasticizer (B) having a structural unit formed by linking three or more ether compounds used in the present invention (hereinafter sometimes referred to as “polyether ester plasticizer (B)”). There is no particular limitation as long as it is a compound having a structural unit formed by connecting three or more ether compounds and an ester structure.
- the nitrile group-containing highly saturated copolymer rubber composition is vulcanized by blending the above-mentioned nitrile group-containing highly saturated copolymer rubber (A) with the polyether ester plasticizer (B). It is possible to provide a rubber cross-linked product that is excellent in speed and excellent in heat resistance and cold resistance.
- the polyether ester plasticizer (B) used in the present invention may be a compound having a structural unit formed by linking three or more ether compounds and an ester structure, and has a molecular weight of 600 to 5,000. Are preferred, those with 600-2000 are more preferred, and those with 600-1000 are particularly preferred. By using those having a molecular weight within the above range, the effect of adding the polyether ester plasticizer (B), that is, the effect of improving the vulcanization rate, and the effect of improving the heat resistance and cold resistance are made more prominent. can do.
- each R 1 is independently a hydrogen atom or a hydrocarbon group having 1 to 350 carbon atoms, preferably a hydrogen atom or a hydrocarbon group having 1 to 100 carbon atoms. And particularly preferably a hydrogen atom or a hydrocarbon group having 1 to 60 carbon atoms.
- R 2 s are each independently a hydrogen atom or a hydrocarbon group having 1 to 350 carbon atoms, preferably a hydrogen atom or a hydrocarbon group having 1 to 100 carbon atoms, particularly preferably a hydrogen atom.
- N is an integer of 3 to 100, preferably an integer of 3 to 50, particularly preferably an integer of 3 to 20.
- the compound represented by the general formula (1) is obtained by esterification by, for example, obtaining a corresponding alkylene oxide polymer and reacting the terminal hydroxyl group of the obtained polymer with the corresponding carboxylic acid. Can be manufactured.
- the viscosity is preferably 15 to 200 mPa ⁇ s / 25 ° C., more preferably 30 to 200 Pa ⁇ s / 25 ° C., and still more preferably 50 to 120 mPa ⁇ s / 25 ° C.
- the freezing point is preferably 10 to -20 ° C, more preferably 0 to -20 ° C, still more preferably -2 to -15 ° C.
- the SP value (solubility parameter) is preferably 7 to 11 (cal / cm 3 ) 1/2 , more preferably 8 to 10 (cal / cm 3 ) 1/2 .
- the blending amount of the polyether ester plasticizer (B) in the nitrile group-containing highly saturated copolymer rubber composition of the present invention is preferably 1 to 30 with respect to 100 parts by weight of the highly saturated nitrile rubber (A). Parts by weight, more preferably 2 to 20 parts by weight, still more preferably 5 to 15 parts by weight.
- the blending amount of the polyether ester plasticizer (B) is too small, it is difficult to obtain the effect of adding it, that is, the effect of improving the vulcanization rate, and the effect of improving the cold resistance and heat resistance. The tensile strength may be reduced.
- crosslinkable rubber composition of the present invention is crosslinked with a nitrile group-containing highly saturated copolymer rubber composition containing the above-described highly saturated nitrile rubber (A) and polyether ester plasticizer (B). It is formed by blending an agent. Although it does not specifically limit as a crosslinking agent, A sulfur type crosslinking agent and an organic peroxide crosslinking agent are mentioned. Among these, an organic peroxide crosslinking agent is preferable.
- Sulfur-based cross-linking agents include powdered sulfur, sulfur white, precipitated sulfur, colloidal sulfur, surface-treated sulfur, insoluble sulfur, and the like; sulfur chloride, sulfur dichloride, morpholine disulfide, alkylphenol disulfide, dibenzothiazyl disulfide, N, Sulfur-containing compounds such as N′-dithio-bis (hexahydro-2H-azenopine-2), phosphorus-containing polysulfides, polymer polysulfides; tetramethylthiuram disulfide, selenium dimethyldithiocarbamate, 2- (4′-morpholinodithio) And sulfur donating compounds such as benzothiazole; These can be used individually by 1 type or in combination of multiple types.
- organic peroxide crosslinking agents include dicumyl peroxide, cumene hydroperoxide, t-butylcumyl peroxide, paramentane hydroperoxide, di-t-butyl peroxide, 1,3-bis (t-butylperoxyisopropyl) benzene, 1,4-bis (t-butylperoxyisopropyl) benzene, 1,1-di-t-butylperoxy-3,3-trimethylcyclohexane, 4,4-bis- (t-butyl-peroxy) -n-butylvale 2,5-dimethyl-2,5-di-t-butylperoxyhexane, 2,5-dimethyl-2,5-di-t-butylperoxyhexyne-3, 1,1-di-t-butyl Peroxy-3,5,5-trimethylcyclohexane, p-chlorobenzoyl peroxide, t-butyl
- the content of the crosslinking agent in the crosslinkable rubber composition of the present invention is not particularly limited, but is preferably 1 to 20 parts by weight, more preferably 1 to 10 parts by weight based on 100 parts by weight of the highly saturated nitrile rubber (A). Part by weight, particularly preferably 1 to 5 parts by weight.
- the nitrile group-containing highly saturated copolymer rubber composition and the crosslinkable rubber composition of the present invention include other compounding agents used for general rubber as necessary, for example, crosslinking.
- Additives such as retarders, anti-aging agents, fillers, reinforcing agents, lubricants, adhesives, lubricants, processing aids, flame retardants, antifungal agents, antistatic agents, and coloring agents may be blended.
- the compounding amounts of these compounding agents are not particularly limited as long as they do not impair the effects of the present invention, and the amount according to the purpose can be appropriately compounded.
- an anti-aging agent such as phenol, amine, benzimidazole or phosphoric acid
- an anti-aging agent such as phenol, amine, benzimidazole or phosphoric acid
- 2,2'-methylenebis (4-methyl-6-t-butylphenol) and the like are used in the phenol system
- benzimidazole-based examples include 2-mercaptobenzimidazole, 2-mercaptobenzimidazole zinc salt and the like. These may be used alone or in combination of two or more.
- Fillers include ⁇ , ⁇ - such as carbon black, silica, calcium carbonate, aluminum silicate, magnesium silicate, calcium silicate, magnesium oxide, short fiber, zinc (meth) acrylate and magnesium (meth) acrylate. Examples thereof include an ethylenically unsaturated carboxylic acid metal salt.
- the nitrile group-containing highly saturated copolymer rubber composition and the crosslinkable rubber composition of the present invention contain a rubber other than the highly saturated nitrile rubber (A) as long as the effects of the present invention are not impaired. May be.
- the rubber other than the highly saturated nitrile rubber (A) is not particularly limited, but acrylic rubber, ethylene-acrylic acid copolymer rubber, fluorine rubber, styrene-butadiene copolymer rubber, ethylene-propylene copolymer rubber, ethylene -Propylene-diene terpolymer rubber, natural rubber and polyisoprene rubber, ethylene-vinyl acetate copolymer and the like.
- the blending amount in the case of blending a rubber other than the highly saturated nitrile rubber (A) is preferably 100 parts by weight or less, more preferably 50 parts by weight or less, with respect to 100 parts by weight of the highly saturated nitrile rubber (A).
- the amount is particularly preferably 30 parts by weight or less.
- the nitrile group-containing highly saturated copolymer rubber composition and the crosslinkable rubber composition of the present invention are prepared by mixing each of the above components preferably in a non-aqueous system.
- a crosslinking agent or a thermally unstable component for example, a crosslinking aid
- the components excluding the components can be prepared by primary kneading with a mixer such as a Banbury mixer, intermixer, kneader, etc., and then transferred to a roll or the like, followed by secondary kneading by adding a crosslinking agent or a thermally unstable component.
- Cross-linked rubber The cross-linked rubber of the present invention is obtained by cross-linking the cross-linkable rubber composition described above.
- the cross-linked rubber composition of the present invention uses the cross-linkable rubber composition of the present invention, and is molded by a molding machine corresponding to a desired shape, for example, an extruder, an injection molding machine, a compressor, a roll, and heated. It can manufacture by performing a crosslinking reaction and fixing a shape as a crosslinked product. In this case, crosslinking may be performed after molding in advance, or crosslinking may be performed simultaneously with molding.
- the molding temperature is usually 10 to 200 ° C, preferably 25 to 120 ° C.
- the crosslinking temperature is usually 100 to 200 ° C., preferably 130 to 190 ° C.
- the crosslinking time is usually 1 minute to 24 hours, preferably 2 minutes to 1 hour.
- soot heating method a general method used for crosslinking of rubber such as press heating, steam heating, oven heating, hot air heating, etc. may be appropriately selected.
- the rubber cross-linked product of the present invention thus obtained is obtained by using a cross-linkable rubber composition obtained by blending a nitrile group-containing highly saturated copolymer rubber composition of the present invention with a cross-linking agent. Therefore, it is excellent in heat resistance and cold resistance.
- the rubber cross-linked product of the present invention is used for O-rings, packings, diaphragms, oil seals, shaft seals, bearing seals, well head seals, pneumatic equipment seals, air conditioner cooling devices and air conditioner refrigerators.
- Seal for sealing of fluorocarbons or fluorohydrocarbons or carbon dioxide used for compressors, sealing seal for supercritical carbon dioxide or subcritical carbon dioxide used for cleaning media for precision cleaning, rolling devices (rolling bearings, for automobiles)
- sealants such as seals for hub units, automotive water pumps, linear guide devices and ball screws, valves and valve seats, BOP (Blow Out Preventar), platters, etc .; attached to the connection between the intake manifold and cylinder head Intake Manifold gasket, cylinder head gasket attached to the connecting part between cylinder block and cylinder head, rocker cover gasket attached to the connecting part between rocker cover and cylinder head, and connecting part between oil pan and cylinder block or transmission case
- gaskets such as an oil pan gasket to be mounted, a gasket for a fuel cell separator mounted between a pair of housings sandwiching a unit cell having a positive electrode, an electrolyte plate and a negative electrode, a top cover gasket for a hard disk drive, a printing roll,
- Various belts Fuel hose, turbo air hose, oil hose, radiator hose, heater hose, water hose, vacuum brake hose, control hose, air conditioner hose, brake hose, power steering hose, air hose, marine hose, riser, flow line, etc.
- Various hoses; boots such as CVJ boots, propeller shaft boots, constant velocity joint boots, rack and pinion boots; cushion materials, dynamic dampers, rubber couplings Attenuating rubber parts such as dust covers, automobile interior parts, tires, covered cables, shoe soles, electromagnetic wave shields, flexible printed circuit board adhesives, fuel cell separators, etc. It can be used in a wide range of applications such as cosmetics and pharmaceuticals, food contact, and electronics.
- the content ratio of each monomer unit constituting the highly saturated nitrile rubber was measured by the following method. That is, the content ratio of 1,3-butadiene units (including a saturated portion) is determined by using highly saturated nitrile rubber and the iodine value before and after the hydrogenation reaction (according to JIS K 6235). It was calculated by measuring.
- the content ratio of the acrylonitrile unit was calculated by measuring the nitrogen content in the highly saturated nitrile rubber by the Kjeldahl method according to JIS K6384.
- the content ratio of the n-butyl acrylate unit was calculated as the remaining component with respect to each monomer unit.
- the iodine value of the highly saturated nitrile rubber was measured according to JIS K 6235.
- Mooney viscosity (Polymer Mooney) The Mooney viscosity (polymer Mooney) of the highly saturated nitrile rubber was measured according to JIS K6300-1 (unit: [ML 1 + 4 , 100 ° C.]).
- T 90 means the time required for the torque to increase 90% from the minimum torque ML when “maximum torque MH ⁇ minimum torque ML” is 100%. Incidentally, as the T 90 is small, the vulcanization rate is high, it can be determined that the high productivity.
- the crosslinkable rubber composition was put into a mold having a length of 15 cm, a width of 15 cm, and a depth of 0.2 cm, and press-molded at 170 ° C. for 20 minutes while being pressed at a press pressure of 10 MPa to obtain a sheet-like rubber cross-linked product.
- the obtained sheet-like rubber cross-linked product was punched out with a No. 3 dumbbell to prepare a test piece. And using the obtained test piece, according to JISK6251, the tensile strength of the rubber crosslinked material, elongation, and 100% tensile stress were measured.
- Synthesis Example 1 Synthesis of highly saturated nitrile rubber (A-1)
- A-1 highly saturated nitrile rubber
- 0.2 parts of sodium carbonate was dissolved in 200 parts of ion-exchanged water, and 2.25 parts of fatty acid potassium soap (potassium salt of fatty acid) was added thereto to prepare an aqueous soap solution.
- 9 parts of acrylonitrile, 15 parts of n-butyl acrylate, and 0.45 part of t-dodecyl mercaptan (molecular weight modifier) were charged in this order in this soap solution, and the internal gas was replaced with nitrogen three times. 35 parts of 1,3-butadiene was charged.
- the inside of the reactor was kept at 5 ° C., 0.1 part of cumene hydroperoxide (polymerization initiator), appropriate amounts of a reducing agent and a chelating agent were charged, and a polymerization reaction was started.
- a polymerization reaction reached 60%, 10 parts of acrylonitrile, 10 parts of n-butyl acrylate and 21 parts of 1,3-butadiene were added, and when the polymerization conversion reached 85%, the concentration was 10%.
- Nitrile rubber (a-1) was obtained by vacuum drying at 60 ° C. for 12 hours.
- the obtained nitrile rubber (a-1) was dissolved in acetone so as to have a concentration of 12%, and this was put into an autoclave, and the palladium-silica catalyst was added at 400 ppm by weight with respect to the nitrile rubber (a-1).
- a hydrogenation reaction was performed at a hydrogen pressure of 3.0 MPa. After completion of the hydrogenation reaction, the mixture was poured into a large amount of water to coagulate, filtered and dried to obtain a highly saturated nitrile rubber (A-1).
- composition of the resulting highly saturated nitrile rubber (A-1) was 19% by weight of acrylonitrile units, 35.5% by weight of n-butyl acrylate units, and 45.5% by weight of butadiene units (including the saturated portion).
- the iodine value was 16, and the polymer Mooney viscosity [ML 1 + 4 , 100 ° C.] was 65.
- Synthesis Example 2 (Synthesis of highly saturated nitrile rubber (A-2))
- the nitrile rubber (a-1) obtained in Synthesis Example 1 was dissolved in acetone so as to have a concentration of 12%, and this was put in an autoclave, and a palladium / silica catalyst was added to the nitrile rubber (a-1) to 500%.
- Hydrogen addition reaction was performed at a hydrogen pressure of 3.0 MPa by adding ppm by weight. After completion of the hydrogenation reaction, the mixture was poured into a large amount of water to coagulate, filtered and dried to obtain a highly saturated nitrile rubber (A-2).
- composition of the resulting highly saturated nitrile rubber (A-2) was 19% by weight of acrylonitrile units, 35.5% by weight of n-butyl acrylate units, and 45.5% by weight of butadiene units (including saturated portions). %, The iodine value was 10, and the polymer Mooney viscosity [ML 1 + 4 , 100 ° C.] was 70.
- Synthesis Example 3 Synthesis of highly saturated nitrile rubber (A'-3)
- A'-3 highly saturated nitrile rubber
- 0.2 parts of sodium carbonate was dissolved in 200 parts of ion-exchanged water, and 2.25 parts of fatty acid potassium soap (potassium salt of fatty acid) was added thereto to prepare an aqueous soap solution.
- 38 parts of acrylonitrile and 0.45 part of t-dodecyl mercaptan (molecular weight regulator) were charged in this order in this soap solution, and the internal gas was replaced with nitrogen three times, and then 62 parts of 1,3-butadiene were added.
- t-dodecyl mercaptan molecular weight regulator
- the latex obtained above was added to an aqueous solution of aluminum sulfate in an amount of 3% by weight with respect to the nitrile rubber content and stirred to coagulate the latex, and after filtering with washing with water, Nitrile rubber (a-2) was obtained by vacuum drying at 60 ° C. for 12 hours.
- nitrile rubber (a-2) was dissolved in acetone so as to have a concentration of 12%, and this was put into an autoclave, and a palladium-silica catalyst was added at 500 ppm by weight with respect to the nitrile rubber, and a hydrogen pressure of 3
- the hydrogenation reaction was performed at 0.0 MPa. After completion of the hydrogenation reaction, the mixture was poured into a large amount of water to coagulate, filtered and dried to obtain a highly saturated nitrile rubber (A′-3).
- composition of the resulting highly saturated nitrile rubber (A′-3) was 36% by weight of acrylonitrile units, 64% by weight of butadiene units (including the saturated portion), the iodine value was 10, and the polymer Mooney viscosity [ML 1 + 4 , 100 ° C.] was 81.
- Example 1 Using a Banbury mixer, 100 parts of the highly saturated nitrile rubber (A-1) obtained in Synthesis Example 1, 80 parts of FEF carbon (trade name “SEAST SO”, manufactured by Tokai Carbon Co., Ltd., carbon black), polyetherester Plasticizer (trade name “ADEKA SIZER RS-735”, manufactured by ADEKA, molecular weight: 850, viscosity: 80 mPa ⁇ s / 25 ° C., freezing point: ⁇ 8 ° C., SP value: 9.2 (cal / cm 3 ) 1 / 2 , 10 parts of the compound represented by the general formula (1)), 4,4′-bis ( ⁇ , ⁇ -dimethylbenzyl) diphenyllamine (trade name “Naugard 445”, manufactured by Crompton Corporation, anti-aging agent) ) 1 part, zinc salt of 2-mercaptobenzimidazole (trade name “NOCRACK MBZ”, manufactured by Ouchi Shinko Chemical Co., Ltd., anti-aging agent) 1 part, 1,
- Example 2 A crosslinkable rubber was prepared in the same manner as in Example 1 except that 100 parts of the highly saturated nitrile rubber (A-2) obtained in Synthesis Example 2 was used instead of 100 parts of the highly saturated nitrile rubber (A-1). Compositions were prepared and evaluated in the same manner. The results are shown in Table 1.
- Example 3 The same procedure as in Example 1 was conducted except that the amount of FEF carbon (trade name “SEAST SO” manufactured by Tokai Carbon Co., Ltd., carbon black) was changed from 80 parts to 50 parts, and 15 parts of zinc methacrylate was further added. Then, a crosslinkable rubber composition was prepared and evaluated in the same manner. The results are shown in Table 1.
- FEF carbon trade name “SEAST SO” manufactured by Tokai Carbon Co., Ltd., carbon black
- Comparative Example 2 Instead of 10 parts of polyether ester plasticizer, tri-2-ethylhexyl trimellitic acid (plasticizer, “trade name“ ADEKA SIZER C-8 ”, manufactured by ADEKA, molecular weight: 547, viscosity: 220 mPa ⁇ s / 25 C., freezing point: ⁇ 30 ° C., SP value: 8.9 (cal / cm 3 ) 1/2 )
- a crosslinkable rubber composition was prepared in the same manner as in Example 1 except that 10 parts were used. Was evaluated. The results are shown in Table 1.
- Comparative Example 3 A crosslinkable rubber composition was prepared and evaluated in the same manner as in Example 1 except that 10 parts of the polyether ester plasticizer was not blended. The results are shown in Table 1.
- Comparative Example 4 In the same manner as in Example 1, except that 100 parts of the highly saturated nitrile rubber (A′-3) obtained in Synthesis Example 3 was used instead of 100 parts of the highly saturated nitrile rubber (A-1), the crosslinkability was increased. A rubber composition was prepared and evaluated in the same manner. The results are shown in Table 1.
- the weight ratio of “butadiene unit” includes those that are saturated.
- the rubber composition containing the predetermined highly saturated nitrile rubber (A) and polyether ester plasticizer (B) of the present invention has a high vulcanization speed and is obtained using the rubber composition.
- the resulting rubber cross-linked product was excellent in heat resistance and cold resistance (Examples 1 to 3).
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Abstract
Description
しかしながら、この特許文献1に開示されたゴム組成物を用いて得られるゴム架橋物は、耐寒性はそれなりに改善されているが耐熱性が十分で無く、耐熱性および耐寒性のより一層の向上が望まれていた。
好ましくは、前記ポリエーテルエステル系可塑剤(B)が、下記一般式(1)で表される化合物である。
好ましくは、前記ポリエーテルエステル系可塑剤(B)は、粘度が15~200mPa・s/25℃、凝固点が10~-20℃、SP値が7~11(cal/cm3)1/2である。
好ましくは、前記ポリエーテルエステル系可塑剤(B)の配合量が、高飽和ニトリルゴム(A)100重量部に対して、1~30重量部である。
さらに、本発明によれば、上記架橋性ゴム組成物を架橋してなるゴム架橋物が提供される。
本発明のニトリル基含有高飽和共重合体ゴム組成物は、α,β-エチレン性不飽和ニトリル単量体単位および(メタ)アクリル酸エステル単量体単位を有し、ヨウ素価が120以下であるニトリル基含有高飽和共重合体ゴム(A)と、エーテル化合物が3個以上連結してなる構造単位を有するポリエーテルエステル系可塑剤(B)とを含有してなる組成物である。
本発明で用いるニトリル基含有高飽和共重合体ゴム(A)(以下、「高飽和ニトリルゴム(A)」と記すことがある。)は、α,β-エチレン性不飽和ニトリル単量体単位および(メタ)アクリル酸エステル単量体単位を有し、ヨウ素価が120以下のゴムである。
α,β-エチレン性不飽和多価カルボン酸単量体としては、イタコン酸、フマル酸、マレイン酸などが挙げられる。
α,β-エチレン性不飽和多価カルボン酸無水物単量体としては、無水マレイン酸などが挙げられる。
芳香族ビニル単量体としては、スチレン、α-メチルスチレン、ビニルピリジンなどが挙げられる。
本発明で用いるエーテル化合物が3個以上連結してなる構造単位を有するポリエーテルエステル系可塑剤(B)(以下、「ポリエーテルエステル系可塑剤(B)」と記すことがある。)は、エーテル化合物が3個以上連結してなる構造単位と、エステル構造とを有する化合物であればよく、特に限定されない。本発明においては、上述したニトリル基含有高飽和共重合体ゴム(A)に、ポリエーテルエステル系可塑剤(B)を配合することで、ニトリル基含有高飽和共重合体ゴム組成物を加硫速度に優れ、しかも、耐熱性および耐寒性に優れたゴム架橋物を与えるものとすることができるものである。
本発明の架橋性ゴム組成物は、上述した高飽和ニトリルゴム(A)およびポリエーテルエステル系可塑剤(B)を含むニトリル基含有高飽和共重合体ゴム組成物に、架橋剤を配合してなるものである。架橋剤としては、特に限定されないが、硫黄系架橋剤や、有機過酸化物架橋剤が挙げられる。これらのなかでも、有機過酸化物架橋剤が好ましい。
また、本発明のニトリル基含有高飽和共重合体ゴム組成物、および架橋性ゴム組成物には、その他必要に応じて一般的なゴムに使用される配合剤、例えば、架橋遅延剤、老化防止剤、充填剤、補強剤、滑剤、粘着剤、潤滑剤、加工助剤、難燃剤、防黴剤、帯電防止剤、着色剤などの添加剤を配合してもよい。これらの配合剤の配合量は、本発明の効果を阻害しない範囲であれば特に限定されず、目的に応じた量を適宜配合することができる。
本発明のゴム架橋物は、上述した架橋性ゴム組成物を架橋してなるものである。
本発明のゴム架橋物は、本発明の架橋性ゴム組成物を用い、たとえば、所望の形状に対応した成形機、例えば押出機、射出成形機、圧縮機、ロールなどにより成形を行い、加熱することにより架橋反応を行い、架橋物として形状を固定化することにより製造することができる。この場合においては、予め成形した後に架橋しても、成形と同時に架橋を行ってもよい。成形温度は、通常、10~200℃、好ましくは25~120℃である。架橋温度は、通常、100~200℃、好ましくは130~190℃であり、架橋時間は、通常、1分~24時間、好ましくは2分~1時間である。
すなわち、1,3-ブタジエン単位(飽和化されている部分も含む)の含有割合は、高飽和ニトリルゴムを用いて、水素添加反応前と水素添加反応後のヨウ素価(JIS K 6235による)を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、高飽和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。
アクリル酸n-ブチル単位の含有割合は、上記各単量体単位に対する残り成分として算出した。
高飽和ニトリルゴムのヨウ素価は、JIS K 6235に準じて測定した。
高飽和ニトリルゴムのムーニー粘度(ポリマー・ムーニー)は、JIS K6300-1に従って測定した(単位は〔ML1+4、100℃〕)。
架橋性ゴム組成物について、ゴム架橋試験機(オシレーティングディスクレオメーターODR、東洋精機社製)を用い、170℃、30分の条件で架橋性試験を行った。そして、架橋性試験の結果から、最小トルク「ML」(単位は、dN・m)、最大トルク「MH」(単位は、dN・m)、およびT90(単位は、min.)を測定した。なおT90は、「最大トルクMH-最小トルクML」を100%としたときに、トルクが最小トルクMLから、90%上昇するのに要する時間を意味する。なお、T90が小さいほど、加硫速度が速く、生産性に優れると判断することができる。
架橋性ゴム組成物を、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。得られたシート状のゴム架橋物を3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、伸び、および100%引張応力を測定した。
上記常態物性の評価と同様にして、シート状のゴム架橋物を得た後、JIS K6257に従い、空気加熱老化試験を行った。具体的には、得られたシート状のゴム架橋物を温度150℃、336時間の条件でギヤーオーブンに保持した後、上記常態物性と同様にして引張試験を実施し、伸び変化率を測定した。伸び変化率の絶対値が小さいほど耐熱性に優れると判断できる。
上記常態物性の評価と同様にして、シート状のゴム架橋物を得た後、得られたシート状のゴム架橋物について、JIS K6261(2006)に準拠したゲーマン捻り試験を行い、室温(23℃)のモジュラスに対する比モジュラスが10倍になる温度T10を測定した。T10の値が低いほど耐寒性に優れると判断できる。
反応器内でイオン交換水200部に、炭酸ナトリウム0.2部を溶解し、それに脂肪酸カリウム石鹸(脂肪酸のカリウム塩)2.25部を添加して石鹸水溶液を調製した。そして、この石鹸水溶液に、アクリロニトリル9部、アクリル酸n-ブチル15部、およびt-ドデシルメルカプタン(分子量調整剤)0.45部をこの順に仕込み、内部の気体を窒素で3回置換した後、1,3-ブタジエン35部を仕込んだ。次いで、反応器内を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、還元剤およびキレート剤適量を仕込み、重合反応を開始した。重合転化率が60%になった時点で、アクリロニトリル10部、アクリル酸n-ブチル10部、1,3-ブタジエン21部を添加し、重合転化率が85%になった時点で、濃度10%のハイドロキノン(重合停止剤)水溶液0.1部を加えて重合反応を停止し、水温60℃のロータリーエバポレ-タを用いて残留単量体を除去して、ニトリルゴムのラテックス(固形分濃度約25重量%)を得た。
合成例1で得られたニトリルゴム(a-1)を、濃度12%となるようにアセトンに溶解し、これをオートクレーブに入れ、パラジウム・シリカ触媒をニトリルゴム(a-1)に対して500重量ppm加え、水素圧3.0MPaで水素添加反応を行なった。水素添加反応終了後、大量の水中に注いで凝固させ、濾別および乾燥を行なって高飽和ニトリルゴム(A-2)を得た。得られた高飽和ニトリルゴム(A-2)の組成は、アクリロニトリル単位19重量%、アクリル酸n-ブチル単位35.5重量%、ブタジエン単位(飽和化されている部分を含む)45.5重量%であり、ヨウ素価は10、ポリマー・ムーニー粘度〔ML1+4、100℃〕は70であった。
反応器内でイオン交換水200部に、炭酸ナトリウム0.2部を溶解し、それに脂肪酸カリウム石鹸(脂肪酸のカリウム塩)2.25部を添加して石鹸水溶液を調製した。そして、この石鹸水溶液に、アクリロニトリル38部、およびt-ドデシルメルカプタン(分子量調整剤)0.45部をこの順に仕込み、内部の気体を窒素で3回置換した後、1,3-ブタジエン62部を仕込んだ。次いで、反応器内を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、還元剤およびキレート剤適量を仕込み、重合反応を開始した。重合転化率が85%になった時点で、濃度10%のハイドロキノン(重合停止剤)水溶液0.1部を加えて重合反応を停止し、水温60℃のロータリーエバポレ-タを用いて残留単量体を除去して、ニトリルゴムのラテックス(固形分濃度約25重量%)を得た。
バンバリーミキサを用いて、合成例1で得られた高飽和ニトリルゴム(A-1)100部に、FEFカーボン(商品名「シーストSO」、東海カーボン社製、カーボンブラック)80部、ポリエーテルエステル系可塑剤(商品名「アデカサイザー RS-735」、ADEKA社製、分子量:850、粘度:80mPa・s/25℃、凝固点:-8℃、SP値:9.2(cal/cm3)1/2、上記一般式(1)で表される化合物)10部、4,4’-ビス(α,α-ジメチルベンジル)ジフェニルルアミン(商品名「ナウガード445」、Crompton Corporation社製、老化防止剤)1部、2-メルカプトベンズイミダゾールの亜鉛塩(商品名「ノクラック MBZ」、大内振興化学社製、老化防止剤)1部、1,3-ビス(t-ブチルペルオキシイソプロピル)ベンゼン40%品(商品名「Vul Cup 40KE」、アルケマ社製、有機過酸化物架橋剤)6部を添加して混練することで、架橋性ゴム組成物を得た。
高飽和ニトリルゴム(A-1)100部の代わりに、合成例2で得られた高飽和ニトリルゴム(A-2)100部を使用した以外は、実施例1と同様にして、架橋性ゴム組成物を調製し、同様に評価を行った。結果を表1に示す。
FEFカーボン(商品名「シーストSO」、東海カーボン社製、カーボンブラック)の配合量を80部から50部に変更するとともに、メタクリル酸亜鉛15部をさらに配合した以外は、実施例1と同様にして、架橋性ゴム組成物を調製し、同様に評価を行った。結果を表1に示す。
ポリエーテルエステル系可塑剤10部の代わりに、アジピン酸エーテルエステル系可塑剤(商品名「アデカサイザー RS-107」、ADEKA社製、分子量:434、粘度:20mPa・s/25℃、凝固点:-47℃、SP値:9.2(cal/cm3)1/2)10部を使用した以外は、実施例1と同様にして、架橋性ゴム組成物を調製し、同様に評価を行った。結果を表1に示す。
ポリエーテルエステル系可塑剤10部の代わりに、トリメリット酸トリ-2-エチルヘキシル(可塑剤、「商品名「アデカサイザー C-8」、ADEKA社製、分子量:547、粘度:220mPa・s/25℃、凝固点:-30℃、SP値:8.9(cal/cm3)1/2)10部を使用した以外は、実施例1と同様にして、架橋性ゴム組成物を調製し、同様に評価を行った。結果を表1に示す。
ポリエーテルエステル系可塑剤10部を配合しなかった以外は、実施例1と同様にして、架橋性ゴム組成物を調製し、同様に評価を行った。結果を表1に示す。
高飽和ニトリルゴム(A-1)100部の代わりに、合成例3で得られた高飽和ニトリルゴム(A’-3)100部を使用した以外は、実施例1と同様にして、架橋性ゴム組成物を調製し、同様に評価を行った。結果を表1に示す。
さらに、高飽和ニトリルゴムとして、(メタ)アクリル酸エステル単量体単位を含有しない、アクリロニトリル-ブタジエン共重合体ゴムを用いた場合には、得られるゴム架橋物は、耐熱性および耐寒性に劣るものであった(比較例4)。
Claims (7)
- α,β-エチレン性不飽和ニトリル単量体単位および(メタ)アクリル酸エステル単量体単位を有し、ヨウ素価が120以下であるニトリル基含有高飽和共重合体ゴム(A)と、エーテル化合物が3個以上連結してなる構造単位を有するポリエーテルエステル系可塑剤(B)とを含有してなるニトリル基含有高飽和共重合体ゴム組成物。
- 前記ポリエーテルエステル系可塑剤(B)の分子量が600~5000である請求項1に記載のニトリル基含有高飽和共重合体ゴム組成物。
- 前記ポリエーテルエステル系可塑剤(B)は、粘度が15~200mPa・s/25℃、凝固点が10~-20℃、SP値が7~11(cal/cm3)1/2である請求項1~3のいずれか1項に記載のニトリル基含有高飽和共重合体ゴム組成物。
- 前記ポリエーテルエステル系可塑剤(B)の配合量が、高飽和ニトリルゴム(A)100重量部に対して、1~30重量部である請求項1~4のいずれか1項に記載のニトリル基含有高飽和共重合体ゴム組成物。
- 請求項1~5のいずれか1項に記載のニトリル基含有高飽和共重合体ゴム組成物に、架橋剤を配合してなる架橋性ゴム組成物。
- 請求項6に記載の架橋性ゴム組成物を架橋してなるゴム架橋物。
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Also Published As
Publication number | Publication date |
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US20160297955A1 (en) | 2016-10-13 |
CN105705569A (zh) | 2016-06-22 |
EP3075776A1 (en) | 2016-10-05 |
EP3075776A4 (en) | 2017-11-01 |
ES2754062T5 (es) | 2022-10-13 |
CN105705569B (zh) | 2017-09-01 |
EP3075776B2 (en) | 2022-07-27 |
EP3075776B1 (en) | 2019-08-28 |
JP6933440B2 (ja) | 2021-09-08 |
RU2016121713A (ru) | 2018-01-10 |
RU2658042C2 (ru) | 2018-06-19 |
US10442918B2 (en) | 2019-10-15 |
JPWO2015080130A1 (ja) | 2017-03-16 |
ES2754062T3 (es) | 2020-04-15 |
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