JP5687661B2 - タイヤ用ゴム組成物及び空気入りタイヤ - Google Patents
タイヤ用ゴム組成物及び空気入りタイヤ Download PDFInfo
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- JP5687661B2 JP5687661B2 JP2012152839A JP2012152839A JP5687661B2 JP 5687661 B2 JP5687661 B2 JP 5687661B2 JP 2012152839 A JP2012152839 A JP 2012152839A JP 2012152839 A JP2012152839 A JP 2012152839A JP 5687661 B2 JP5687661 B2 JP 5687661B2
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- 239000005060 rubber Substances 0.000 title claims description 57
- 239000000203 mixture Substances 0.000 title claims description 40
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 81
- 239000000194 fatty acid Substances 0.000 claims description 81
- 229930195729 fatty acid Natural products 0.000 claims description 81
- 150000004665 fatty acids Chemical class 0.000 claims description 62
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 61
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 60
- -1 aliphatic alcohols Chemical class 0.000 claims description 41
- 239000000377 silicon dioxide Substances 0.000 claims description 30
- 239000004014 plasticizer Substances 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 21
- 150000002148 esters Chemical class 0.000 claims description 17
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 12
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 7
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 7
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 7
- 239000005642 Oleic acid Substances 0.000 claims description 7
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 7
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 7
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 7
- 239000008158 vegetable oil Substances 0.000 claims description 7
- 125000005313 fatty acid group Chemical group 0.000 claims 1
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- 239000001993 wax Substances 0.000 description 40
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- 238000000034 method Methods 0.000 description 10
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- 239000000446 fuel Substances 0.000 description 9
- 238000005299 abrasion Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
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- ULQISTXYYBZJSJ-UHFFFAOYSA-N 12-hydroxyoctadecanoic acid Chemical compound CCCCCCC(O)CCCCCCCCCCC(O)=O ULQISTXYYBZJSJ-UHFFFAOYSA-N 0.000 description 7
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- 238000002156 mixing Methods 0.000 description 7
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000006087 Silane Coupling Agent Substances 0.000 description 6
- 235000019486 Sunflower oil Nutrition 0.000 description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 239000002600 sunflower oil Substances 0.000 description 6
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000004636 vulcanized rubber Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 244000043261 Hevea brasiliensis Species 0.000 description 4
- 239000005062 Polybutadiene Substances 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 125000000217 alkyl group Chemical group 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 4
- 239000004203 carnauba wax Substances 0.000 description 4
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- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000000113 differential scanning calorimetry Methods 0.000 description 4
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- 229920003052 natural elastomer Polymers 0.000 description 4
- 229920001194 natural rubber Polymers 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- 229920002857 polybutadiene Polymers 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- VACHUYIREGFMSP-UHFFFAOYSA-N (+)-threo-9,10-Dihydroxy-octadecansaeure Natural products CCCCCCCCC(O)C(O)CCCCCCCC(O)=O VACHUYIREGFMSP-UHFFFAOYSA-N 0.000 description 3
- 229940114072 12-hydroxystearic acid Drugs 0.000 description 3
- 235000021355 Stearic acid Nutrition 0.000 description 3
- 239000004204 candelilla wax Substances 0.000 description 3
- 235000013868 candelilla wax Nutrition 0.000 description 3
- 229940073532 candelilla wax Drugs 0.000 description 3
- 239000004359 castor oil Substances 0.000 description 3
- 235000019438 castor oil Nutrition 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 3
- IUJAMGNYPWYUPM-UHFFFAOYSA-N hentriacontane Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC IUJAMGNYPWYUPM-UHFFFAOYSA-N 0.000 description 3
- 229940119170 jojoba wax Drugs 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 3
- 239000004006 olive oil Substances 0.000 description 3
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- 239000012188 paraffin wax Substances 0.000 description 3
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- 238000012360 testing method Methods 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- DSEKYWAQQVUQTP-XEWMWGOFSA-N (2r,4r,4as,6as,6as,6br,8ar,12ar,14as,14bs)-2-hydroxy-4,4a,6a,6b,8a,11,11,14a-octamethyl-2,4,5,6,6a,7,8,9,10,12,12a,13,14,14b-tetradecahydro-1h-picen-3-one Chemical compound C([C@H]1[C@]2(C)CC[C@@]34C)C(C)(C)CC[C@]1(C)CC[C@]2(C)[C@H]4CC[C@@]1(C)[C@H]3C[C@@H](O)C(=O)[C@@H]1C DSEKYWAQQVUQTP-XEWMWGOFSA-N 0.000 description 2
- PKBSGDQYUYBUDY-UHFFFAOYSA-N 1-nonacosanol Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCCCO PKBSGDQYUYBUDY-UHFFFAOYSA-N 0.000 description 2
- ZDHCZVWCTKTBRY-UHFFFAOYSA-N 12-hydroxylauric acid Chemical compound OCCCCCCCCCCCC(O)=O ZDHCZVWCTKTBRY-UHFFFAOYSA-N 0.000 description 2
- JGHSBPIZNUXPLA-UHFFFAOYSA-N 2-hydroxyhexadecanoic acid Chemical compound CCCCCCCCCCCCCCC(O)C(O)=O JGHSBPIZNUXPLA-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- QOEHNLSDMADWEF-UHFFFAOYSA-N I-Dotriacontanol Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCO QOEHNLSDMADWEF-UHFFFAOYSA-N 0.000 description 2
- 235000019482 Palm oil Nutrition 0.000 description 2
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 2
- 244000046052 Phaseolus vulgaris Species 0.000 description 2
- 235000019484 Rapeseed oil Nutrition 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 235000013871 bee wax Nutrition 0.000 description 2
- 239000012166 beeswax Substances 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 229920003244 diene elastomer Polymers 0.000 description 2
- 239000000539 dimer Substances 0.000 description 2
- NOPFSRXAKWQILS-UHFFFAOYSA-N docosan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCCCCCO NOPFSRXAKWQILS-UHFFFAOYSA-N 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- IRHTZOCLLONTOC-UHFFFAOYSA-N hexacosan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCO IRHTZOCLLONTOC-UHFFFAOYSA-N 0.000 description 2
- SKGCQRZZTHOERR-UHFFFAOYSA-N hexatriacontyl alcohol Natural products CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCO SKGCQRZZTHOERR-UHFFFAOYSA-N 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004200 microcrystalline wax Substances 0.000 description 2
- CNNRPFQICPFDPO-UHFFFAOYSA-N octacosan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCCO CNNRPFQICPFDPO-UHFFFAOYSA-N 0.000 description 2
- 239000002540 palm oil Substances 0.000 description 2
- 239000012169 petroleum derived wax Substances 0.000 description 2
- 235000019381 petroleum wax Nutrition 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
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- 239000002994 raw material Substances 0.000 description 2
- 150000004671 saturated fatty acids Chemical class 0.000 description 2
- 235000011803 sesame oil Nutrition 0.000 description 2
- 239000008159 sesame oil Substances 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- TYWMIZZBOVGFOV-UHFFFAOYSA-N tetracosan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCO TYWMIZZBOVGFOV-UHFFFAOYSA-N 0.000 description 2
- OULAJFUGPPVRBK-UHFFFAOYSA-N tetratriacontan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCO OULAJFUGPPVRBK-UHFFFAOYSA-N 0.000 description 2
- REZQBEBOWJAQKS-UHFFFAOYSA-N triacontan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCO REZQBEBOWJAQKS-UHFFFAOYSA-N 0.000 description 2
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 2
- ATRNZOYKSNPPBF-CYBMUJFWSA-N (R)-3-hydroxytetradecanoic acid Chemical compound CCCCCCCCCCC[C@@H](O)CC(O)=O ATRNZOYKSNPPBF-CYBMUJFWSA-N 0.000 description 1
- JPFGKGZYCXLEGQ-UHFFFAOYSA-N 1-(4-methoxyphenyl)-5-methylpyrazole-4-carboxylic acid Chemical compound C1=CC(OC)=CC=C1N1C(C)=C(C(O)=O)C=N1 JPFGKGZYCXLEGQ-UHFFFAOYSA-N 0.000 description 1
- 229960002666 1-octacosanol Drugs 0.000 description 1
- KIHBGTRZFAVZRV-UHFFFAOYSA-N 2-Hydroxyoctadecanoic acid Natural products CCCCCCCCCCCCCCCCC(O)C(O)=O KIHBGTRZFAVZRV-UHFFFAOYSA-N 0.000 description 1
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 1
- KZTCAXCBXSIQSS-UHFFFAOYSA-N 4-n-(4-methylpentan-2-yl)-4-n-phenylbenzene-1,4-diamine Chemical compound C=1C=C(N)C=CC=1N(C(C)CC(C)C)C1=CC=CC=C1 KZTCAXCBXSIQSS-UHFFFAOYSA-N 0.000 description 1
- VACHUYIREGFMSP-SJORKVTESA-N 9,10-Dihydroxystearic acid Natural products CCCCCCCC[C@@H](O)[C@@H](O)CCCCCCCC(O)=O VACHUYIREGFMSP-SJORKVTESA-N 0.000 description 1
- 244000099147 Ananas comosus Species 0.000 description 1
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- ATRNZOYKSNPPBF-UHFFFAOYSA-N D-beta-hydroxymyristic acid Natural products CCCCCCCCCCCC(O)CC(O)=O ATRNZOYKSNPPBF-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- 102220504394 Heart- and neural crest derivatives-expressed protein 2_K80Q_mutation Human genes 0.000 description 1
- 239000004166 Lanolin Substances 0.000 description 1
- 235000018330 Macadamia integrifolia Nutrition 0.000 description 1
- 240000000912 Macadamia tetraphylla Species 0.000 description 1
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- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
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- 125000001931 aliphatic group Chemical group 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
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- BTFJIXJJCSYFAL-UHFFFAOYSA-N arachidyl alcohol Natural products CCCCCCCCCCCCCCCCCCCCO BTFJIXJJCSYFAL-UHFFFAOYSA-N 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000828 canola oil Substances 0.000 description 1
- 235000019519 canola oil Nutrition 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- MSUOLNSQHLHDAS-UHFFFAOYSA-N cerebronic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCCC(O)C(O)=O MSUOLNSQHLHDAS-UHFFFAOYSA-N 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 229920005556 chlorobutyl Polymers 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
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- 235000019864 coconut oil Nutrition 0.000 description 1
- 239000003240 coconut oil Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
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- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
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- ZGJKNMPTVDDRRH-UHFFFAOYSA-N heptatriacontan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCO ZGJKNMPTVDDRRH-UHFFFAOYSA-N 0.000 description 1
- KCNOEZOXGYXXQU-UHFFFAOYSA-N heptatriacontan-19-one Chemical compound CCCCCCCCCCCCCCCCCCC(=O)CCCCCCCCCCCCCCCCCC KCNOEZOXGYXXQU-UHFFFAOYSA-N 0.000 description 1
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- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 239000010466 nut oil Substances 0.000 description 1
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- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical compound CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 description 1
- 229960003656 ricinoleic acid Drugs 0.000 description 1
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 description 1
- 235000005713 safflower oil Nutrition 0.000 description 1
- 239000003813 safflower oil Substances 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 239000005049 silicon tetrachloride Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- PXQLVRUNWNTZOS-UHFFFAOYSA-N sulfanyl Chemical class [SH] PXQLVRUNWNTZOS-UHFFFAOYSA-N 0.000 description 1
- 238000010059 sulfur vulcanization Methods 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
- 239000003760 tallow Substances 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- VTHOKNTVYKTUPI-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyltetrasulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSSSCCC[Si](OCC)(OCC)OCC VTHOKNTVYKTUPI-UHFFFAOYSA-N 0.000 description 1
- 239000002383 tung oil Substances 0.000 description 1
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- 239000002023 wood Substances 0.000 description 1
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
前記水酸基を有する脂肪酸は、2分子以上の同一又は異なる水酸基を有する脂肪酸の縮合物であることが好ましい。
前記脂肪酸のエステル化合物からなる液状可塑剤は、構成する全脂肪酸100質量%中の1個の不飽和結合を有する脂肪酸の含有量が45質量%以上であることが好ましい。
本発明はまた、前記ゴム組成物を用いて作製した空気入りタイヤに関する。
なお、カーボンブラックのN2SAは、JIS K 6217−2:2001に準拠して測定される。
溶液重合スチレンブタジエンゴム(SBR):日本ゼオン社製の「NS116」
ブタジエン(BR):宇部興産(株)製のUBEPOL BR150B(シス1,4結合量97%、40ML1+4(100℃)、Mw/Mn3.3)
粘着性ワックス:C20−C40アルキル12−(12’−ヒドロキシステアリルオキシ)ステアレート(Koster Keunen社製、Kester Wax K82P 融点75〜85℃)
脂肪酸エステル系可塑剤1:カネダ(株)製のひまわり油(全脂肪酸中のオレイン酸の含有量:88質量%)
脂肪酸エステル系可塑剤2:日清オイリオグループ(株)製のオリーブ油(全脂肪酸中のオレイン酸の含有量:75質量%)
脂肪酸エステル系可塑剤3:日清オイリオグループ(株)製のひまわり油(全脂肪酸中のオレイン酸の含有量:20質量%)
石油系ワックス:日本精蝋(株)製のパラフィンワックス 155°F(融点69℃)
アロマオイル:(株)ジャパンエナジー製のプロセスオイルNC300S
シリカ:EVONIK−DEGUSSA社製のウルトラジルVN3(N2SA:175m2/g)
カーボンブラック:新日化カーボン(株)製のHTC#G(N2SA:26m2/g)
シランカップリング剤:EVONIK−DEGUSSA社製のSi69(ビス(3−トリエトキシシリルプロピル)テトラスルフィド)
ステアリン酸:日油(株)製のステアリン酸「桐」
酸化亜鉛:三井金属鉱業(株)製酸化亜鉛2種
老化防止剤:大内新興化学工業(株)製のノクラック6C(N−(1,3−ジメチルブチル)−N−フェニル−p−フェニレンジアミン)
硫黄:鶴見化学工業(株)製の粉末硫黄
加硫促進剤:大内新興化学工業(株)製のノクセラーNS(N−tert−ブチル−2−ベンゾチアゾリルスルフェンアミド
表1の配合処方にしたがい、(株)神戸製鋼所製の1.7Lバンバリーミキサーを用いて、硫黄および加硫促進剤以外の薬品を充填率が58%になるように充填し、80rpmで140℃に到達するまで混練りして混練り物を得た。
次に、オープンロールを用いて、得られた混練り物に硫黄および加硫促進剤を添加して混練りし、未加硫ゴム組成物を得た。さらに、得られた未加硫ゴム組成物を所定のサイズに成形し、150℃の条件下で20分間プレス加硫することにより加硫ゴム組成物を得、約2mm×130mm×130mmの加硫ゴムスラブシートを作成し、試験用サンプルとした。
(株)岩本製作所製の粘弾性スペクトロメーターVESを用いて、温度70℃、初期歪10%、動歪±1%および周波数10Hzの条件下で加硫ゴムスラブシートの損失正接(tanδ)を測定し、比較例1の転がり抵抗指数を100とし、下記計算式により、転がり抵抗を指数表示した。転がり抵抗指数が大きいほど、転がり抵抗が低減され、好ましいことを示す。
(転がり抵抗指数)=(比較例1のtanδ)/(各配合のtanδ)×100
加硫ゴム試験片を(株)岩本製作所製のランボーン摩耗試験機を用いて、表面回転速度50m/分、負荷荷重3.0kg、落砂量15g/分で、スリップ率20%の条件下で摩耗量を測定した。比較例1の摩耗量を100とし、そのほかの摩耗量を指数で表した。指数が大きいほど、耐摩耗性に優れることを示す。
(耐摩耗性指数)=(比較例1の摩耗量)/(各配合の摩耗量)×100
加硫後、目視にてオイル、ワックスのブリード状態を確認し、明らかに析出しているものを×、拡大鏡で見ると析出が確認されるものを△、ブリードが見られないものを〇とした。
JIS K6259 に従い、加硫ゴムシートからダンベル1号で打ち抜いた試験片を20%伸長し、40℃でオゾン濃度50pphm雰囲気下、曝露した。96時間後に表面を観察し、き裂が少数以下で肉眼でかろうじて観察できるレベルのものを○、き裂が多数で比較的大きいもの(1mm未満)を△、亀裂が無数で深くて大きなもの(1mm以上)を×とした。
Claims (8)
- ゴム成分と、シリカと、水酸基を有する脂肪酸及び1価脂肪族アルコールのエステルからなる粘着性ワックスと、脂肪酸のエステル化合物からなる液状可塑剤とを含むタイヤ用ゴム組成物。
- 前記水酸基を有する脂肪酸が、水酸基を有する飽和脂肪酸である請求項1記載のタイヤ用ゴム組成物。
- 前記水酸基を有する脂肪酸が、2分子以上の同一又は異なる水酸基を有する脂肪酸の縮合物である請求項1又は2記載のタイヤ用ゴム組成物。
- 前記水酸基を有する脂肪酸のエステルが、前記水酸基を有する脂肪酸と2種以上の前記1価脂肪族アルコールとのエステルである請求項1〜3のいずれかに記載のタイヤ用ゴム組成物。
- 前記脂肪酸のエステル化合物からなる液状可塑剤が植物性オイルである請求項1〜4のいずれかに記載のタイヤ用ゴム組成物。
- 前記脂肪酸のエステル化合物からなる液状可塑剤は、構成する全脂肪酸100質量%中の1個の不飽和結合を有する脂肪酸の含有量が45質量%以上である請求項1〜5のいずれかに記載のタイヤ用ゴム組成物。
- 前記脂肪酸のエステル化合物からなる液状可塑剤は、構成する全脂肪酸100質量%中のオレイン酸の含有量が45質量%以上である請求項6記載のタイヤ用ゴム組成物。
- 請求項1〜7のいずれかに記載のゴム組成物を用いて作製した空気入りタイヤ。
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