JP7404262B2 - タイヤ - Google Patents
タイヤ Download PDFInfo
- Publication number
- JP7404262B2 JP7404262B2 JP2020553906A JP2020553906A JP7404262B2 JP 7404262 B2 JP7404262 B2 JP 7404262B2 JP 2020553906 A JP2020553906 A JP 2020553906A JP 2020553906 A JP2020553906 A JP 2020553906A JP 7404262 B2 JP7404262 B2 JP 7404262B2
- Authority
- JP
- Japan
- Prior art keywords
- polyurethane foam
- tire
- mass
- rubber
- parts
- 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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- 229920005830 Polyurethane Foam Polymers 0.000 claims description 194
- 239000011496 polyurethane foam Substances 0.000 claims description 194
- 229920001971 elastomer Polymers 0.000 claims description 141
- 239000005060 rubber Substances 0.000 claims description 141
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 127
- 239000000194 fatty acid Substances 0.000 claims description 127
- 229930195729 fatty acid Natural products 0.000 claims description 127
- 239000000203 mixture Substances 0.000 claims description 120
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 114
- -1 glycerin fatty acid ester Chemical class 0.000 claims description 102
- 235000011187 glycerol Nutrition 0.000 claims description 93
- 230000004888 barrier function Effects 0.000 claims description 65
- 238000013461 design Methods 0.000 claims description 61
- 239000000463 material Substances 0.000 claims description 47
- 239000011230 binding agent Substances 0.000 claims description 43
- 239000002245 particle Substances 0.000 claims description 42
- 229910052751 metal Inorganic materials 0.000 claims description 39
- 239000002184 metal Substances 0.000 claims description 39
- 239000000843 powder Substances 0.000 claims description 33
- 239000000126 substance Substances 0.000 claims description 31
- 239000000049 pigment Substances 0.000 claims description 30
- 229920005549 butyl rubber Polymers 0.000 claims description 25
- 239000002734 clay mineral Substances 0.000 claims description 25
- 229920001577 copolymer Polymers 0.000 claims description 22
- 239000006229 carbon black Substances 0.000 claims description 21
- 235000021355 Stearic acid Nutrition 0.000 claims description 20
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 20
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 20
- 239000008117 stearic acid Substances 0.000 claims description 20
- 150000003839 salts Chemical class 0.000 claims description 19
- 241000276425 Xiphophorus maculatus Species 0.000 claims description 14
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical class CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 8
- 229920000178 Acrylic resin Polymers 0.000 claims description 8
- 229910001111 Fine metal Inorganic materials 0.000 claims description 7
- 239000002923 metal particle Substances 0.000 claims description 7
- 150000001735 carboxylic acids Chemical class 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 239000006232 furnace black Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 200
- 150000004665 fatty acids Chemical class 0.000 description 50
- 238000000034 method Methods 0.000 description 34
- 210000004027 cell Anatomy 0.000 description 28
- 125000004432 carbon atom Chemical group C* 0.000 description 20
- 239000000047 product Substances 0.000 description 20
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 18
- 229920005862 polyol Polymers 0.000 description 17
- 238000002845 discoloration Methods 0.000 description 16
- 150000003077 polyols Chemical class 0.000 description 15
- 239000003795 chemical substances by application Substances 0.000 description 14
- 238000005227 gel permeation chromatography Methods 0.000 description 14
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 13
- 230000003712 anti-aging effect Effects 0.000 description 12
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 12
- 239000004927 clay Substances 0.000 description 12
- 238000010097 foam moulding Methods 0.000 description 12
- 238000004073 vulcanization Methods 0.000 description 12
- 229920001897 terpolymer Polymers 0.000 description 11
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 10
- 239000000945 filler Substances 0.000 description 10
- LDVVTQMJQSCDMK-UHFFFAOYSA-N 1,3-dihydroxypropan-2-yl formate Chemical compound OCC(CO)OC=O LDVVTQMJQSCDMK-UHFFFAOYSA-N 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000003925 fat Substances 0.000 description 8
- 235000019197 fats Nutrition 0.000 description 8
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- 235000019198 oils Nutrition 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 7
- 229910052693 Europium Inorganic materials 0.000 description 7
- 229920002857 polybutadiene Polymers 0.000 description 7
- 239000000523 sample Substances 0.000 description 7
- UFTFJSFQGQCHQW-UHFFFAOYSA-N triformin Chemical compound O=COCC(OC=O)COC=O UFTFJSFQGQCHQW-UHFFFAOYSA-N 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000005062 Polybutadiene Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 6
- VBICKXHEKHSIBG-UHFFFAOYSA-N beta-monoglyceryl stearate Natural products CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 6
- XZKRXPZXQLARHH-UHFFFAOYSA-N buta-1,3-dienylbenzene Chemical compound C=CC=CC1=CC=CC=C1 XZKRXPZXQLARHH-UHFFFAOYSA-N 0.000 description 6
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000005187 foaming Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 239000000454 talc Substances 0.000 description 6
- 229910052623 talc Inorganic materials 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 5
- 229910052692 Dysprosium Inorganic materials 0.000 description 5
- 244000043261 Hevea brasiliensis Species 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 5
- 239000010419 fine particle Substances 0.000 description 5
- 239000006260 foam Substances 0.000 description 5
- 239000010445 mica Substances 0.000 description 5
- 229910052618 mica group Inorganic materials 0.000 description 5
- 239000000178 monomer Substances 0.000 description 5
- 229920003052 natural elastomer Polymers 0.000 description 5
- 229920001194 natural rubber Polymers 0.000 description 5
- 239000005056 polyisocyanate Substances 0.000 description 5
- 229920001228 polyisocyanate Polymers 0.000 description 5
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 235000021314 Palmitic acid Nutrition 0.000 description 4
- QHZLMUACJMDIAE-UHFFFAOYSA-N Palmitic acid monoglyceride Natural products CCCCCCCCCCCCCCCC(=O)OCC(O)CO QHZLMUACJMDIAE-UHFFFAOYSA-N 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 4
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 4
- 230000032050 esterification Effects 0.000 description 4
- 238000005886 esterification reaction Methods 0.000 description 4
- 150000002148 esters Chemical group 0.000 description 4
- 150000004820 halides Chemical class 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000005012 migration Effects 0.000 description 4
- 238000013508 migration Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 4
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 4
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 4
- 235000021313 oleic acid Nutrition 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 4
- 229920001451 polypropylene glycol Polymers 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000011550 stock solution Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- RGHNJXZEOKUKBD-NRXMZTRTSA-N (2r,3r,4r,5s)-2,3,4,5,6-pentahydroxyhexanoic acid Chemical compound OC[C@H](O)[C@@H](O)[C@@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-NRXMZTRTSA-N 0.000 description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 3
- NRVFHZGBTDXOEY-UHFFFAOYSA-N 2-methylprop-2-enoic acid;zinc Chemical compound [Zn].CC(=C)C(O)=O NRVFHZGBTDXOEY-UHFFFAOYSA-N 0.000 description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 3
- YXCDZXGJZDGMEP-UHFFFAOYSA-N 4-hydroxy-3,3-bis(hydroxymethyl)butan-2-one Chemical compound CC(=O)C(CO)(CO)CO YXCDZXGJZDGMEP-UHFFFAOYSA-N 0.000 description 3
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 3
- 239000005642 Oleic acid Substances 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- DCBSHORRWZKAKO-UHFFFAOYSA-N alpha-glycerol monomyristate Natural products CCCCCCCCCCCCCC(=O)OCC(O)CO DCBSHORRWZKAKO-UHFFFAOYSA-N 0.000 description 3
- 235000012211 aluminium silicate Nutrition 0.000 description 3
- 229920005557 bromobutyl Polymers 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229940075529 glyceryl stearate Drugs 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
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- 150000004671 saturated fatty acids Chemical class 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 238000005809 transesterification reaction Methods 0.000 description 3
- 239000003981 vehicle Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- PIMBTRGLTHJJRV-UHFFFAOYSA-L zinc;2-methylprop-2-enoate Chemical compound [Zn+2].CC(=C)C([O-])=O.CC(=C)C([O-])=O PIMBTRGLTHJJRV-UHFFFAOYSA-L 0.000 description 3
- XDOFQFKRPWOURC-UHFFFAOYSA-N 16-methylheptadecanoic acid Chemical compound CC(C)CCCCCCCCCCCCCCC(O)=O XDOFQFKRPWOURC-UHFFFAOYSA-N 0.000 description 2
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000005639 Lauric acid Substances 0.000 description 2
- ARIWANIATODDMH-UHFFFAOYSA-N Lauric acid monoglyceride Natural products CCCCCCCCCCCC(=O)OCC(O)CO ARIWANIATODDMH-UHFFFAOYSA-N 0.000 description 2
- OYHQOLUKZRVURQ-HZJYTTRNSA-N Linoleic acid Chemical compound CCCCC\C=C/C\C=C/CCCCCCCC(O)=O OYHQOLUKZRVURQ-HZJYTTRNSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 229910003668 SrAl Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- YZXBAPSDXZZRGB-DOFZRALJSA-N arachidonic acid Chemical compound CCCCC\C=C/C\C=C/C\C=C/C\C=C/CCCC(O)=O YZXBAPSDXZZRGB-DOFZRALJSA-N 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 150000001649 bromium compounds Chemical class 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 229910052570 clay Inorganic materials 0.000 description 2
- 229920006026 co-polymeric resin Polymers 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 2
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- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 description 2
- 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 2
- 229920003244 diene elastomer Polymers 0.000 description 2
- UKMSUNONTOPOIO-UHFFFAOYSA-N docosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCC(O)=O UKMSUNONTOPOIO-UHFFFAOYSA-N 0.000 description 2
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- 229940074050 glyceryl myristate Drugs 0.000 description 2
- 229940096898 glyceryl palmitate Drugs 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
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- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 2
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- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
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- NYGZLYXAPMMJTE-UHFFFAOYSA-M metanil yellow Chemical group [Na+].[O-]S(=O)(=O)C1=CC=CC(N=NC=2C=CC(NC=3C=CC=CC=3)=CC=2)=C1 NYGZLYXAPMMJTE-UHFFFAOYSA-M 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 238000000199 molecular distillation Methods 0.000 description 2
- 229930014626 natural product Natural products 0.000 description 2
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
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- LKUNXBRZDFMZOK-UHFFFAOYSA-N rac-1-monodecanoylglycerol Chemical compound CCCCCCCCCC(=O)OCC(O)CO LKUNXBRZDFMZOK-UHFFFAOYSA-N 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 description 2
- 239000008158 vegetable oil Substances 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N vinyl-ethylene Natural products C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 238000004383 yellowing Methods 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 235000014692 zinc oxide Nutrition 0.000 description 2
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Description
前記ポリウレタンフォーム層が、ポリウレタンフォームを含み、
前記バリア層が、ゴム成分(A)としてブチルゴムを含有するゴム組成物から形成されている、タイヤである。本発明に係るタイヤは、ポリウレタンフォーム層が茶色に変色することを抑制可能である。
本発明に係るタイヤは、ポリウレタンフォーム層が、バリア層を介してタイヤの外層に積層されており、
前記ポリウレタンフォーム層が、ポリウレタンフォームを含み、
前記バリア層が、ブチルゴムを含有するゴム組成物から形成されている、タイヤである。
バリア層は、タイヤゴムに含まれる老化防止剤がポリウレタンフォーム層に移行することを防ぎ、ポリウレタンフォーム層が茶色に変色することを抑制する働きを有する。
本発明のタイヤでは、バリア層は、ゴム成分(A)としてブチルゴムを含有するゴム組成物から形成されている。
ブチルゴム(IIR)は、特に限定されず、公知のブチルゴムを用いることができる。また、ブチルゴムは、未変性ブチルゴムでもよいし、塩素化ブチルゴム、臭素化ブチルゴムなどの変性ブチルゴムでもよい。
ゴム成分(A)は、ブチルゴム以外のゴム成分を含んでいてもよい。ブチルゴム以外のゴム成分としては、例えば、ニトリルゴム、クロロプレンゴム、イソブチレンと少なくとも1種の他のコモノマーとのコポリマーおよびターポリマーなどが挙げられる。有用なコモノマーとしては、例えば、ジビニル芳香族モノマー、アルキル置換ビニル芳香族モノマー、およびこれらの組み合わせなどが挙げられる。
本発明のタイヤのバリア層のフィラーとしては、特に限定されず、公知のフィラーを適宜選択して用いることができる。フィラーとしては、例えば、シリカ、カーボンブラック、クレー、水酸化アルミニウム、アルミナ、タルク、マイカ、カオリン、ガラスバルーン、ガラスビーズ、炭酸カルシウム、炭酸マグネシウム、水酸化マグネシウム、酸化マグネシウム、酸化チタン、チタン酸カリウム、硫酸バリウムなどが挙げられる。
モノグリセライド含有量(面積%)=MG/(G+MG+DG+TG)×100 (I)
上記式(I)中、GはGPCのグリセリン面積、MGはGPCのモノグリセライド面積、DGはGPCのジグリセライド面積、TGはGPCのトリグリセライド面積である。
なお、GPCの測定条件は、下記の通りである。
GPCの測定は、下記測定装置を用い、溶離液としてTHF(テトラヒドロフラン)を0.6mL/分の流速で流し、40℃の恒温槽中でカラムを安定させ、そこにTHFに溶解した1質量%の試料溶液10μLを注入して測定を行う。
標準物質:単分散ポリスチレン
検出器:RI-8022(東ソー社製)
測定装置:HPLC-8220 GPC(東ソー社製)
分析カラム:TSK-GEL SUPER H1000 2本及びTSK-GEL SUPER H2000 2本を直列に連結(東ソー社製)
ステアリン酸(D)を含まない、又は該ステアリン酸(D)の含有量が、前記ゴム成分(A)100質量部に対して0.1質量部以下であることが好ましい。これにより、ポリウレタンフォーム層が茶色に変色することをより抑制できると共に、金属部品への密着性が低く、また、バリア層がサイドウォールゴムに接着しやすくなる。
(1)ポリウレタンフォーム層と未加硫のバリア層のゴム組成物とを、成型した未加硫のタイヤの外側に配置して加硫する方法;
(2)ポリウレタンフォーム層と未加硫のバリア層のゴム組成物とを、加硫したタイヤの外側に配置して加硫する方法;
(3)ポリウレタンフォーム層と未加硫のバリア層のゴム組成物との積層体を予め加硫し、当該加硫した積層体を、成型した未加硫のタイヤの外側に配置して加硫する方法;
(4)ポリウレタンフォーム層と未加硫のバリア層のゴム組成物との積層体を予め加硫し、当該加硫した積層体を、加硫したタイヤの外側に配置して加硫する方法;
(5)ポリウレタンフォーム層と加硫したバリア層のゴム組成物とを、成型した未加硫のタイヤの外側に配置して加硫する方法;および
(6)ポリウレタンフォーム層と加硫したバリア層のゴム組成物とを、加硫したタイヤの外側に配置して加硫する方法。
ポリウレタンフォーム層は、ポリウレタンフォームを含む層である。そして、ポリウレタンフォームは、ウレタンが分子鎖中に不飽和結合を有しないため、ポリウレタンフォーム層は、タイヤに耐オゾンクラック性を付与する働きを有する。
ポリウレタンフォームは、特に限定されず、公知のポリウレタンフォームを用いることができる。また、ポリウレタンフォームは、例えば、発泡剤などによってポリウレタン樹脂を発泡成形したものを用いることができる。
これにより、タイヤの外観がより向上する。
本発明において、意匠性物質は、タイヤの外観ないし意匠性の向上に寄与し得る物質をいう。
意匠性物質としてカーボンブラックを用いると、経年によるポリウレタンフォーム層の変色、例えば黄色への変色を抑制してタイヤが黒色である状態を長期にわたって維持することができ、また、タイヤの外層に積層したポリウレタンフォーム層に微小なクラックが生じたとしても、クラックを目立ちにくくするため、タイヤの外観に優れる。なお、本発明では、カーボンブラックは、顔料に含めないものとする。
意匠性物質として顔料を用いると、ポリウレタンフォーム層の色を様々な色に設定することができるため、タイヤの意匠性がより高まる。
意匠性物質として金属微粒子を用いると、例えば、ポリウレタンフォーム層が、メタクリックカラーを呈色したり、厚さによって色調を変化させたりすることができるため、タイヤの意匠性がより高まる。
意匠性物質として蓄光性粉末を用いると、例えば、夜間などにポリウレタンフォーム層が発光するルミネセンス現象を発現することができるため、タイヤの意匠性がより高まる。
意匠性物質として蛍光性粉末を用いると、例えば、紫外線によってポリウレタンフォーム層が発光するルミネセンス現象を発現することができるため、タイヤの意匠性がより高まる。さらに、明け方、夕暮れ、曇り、霧、雨天など可視光線の弱い状況下でも、蛍光性粉末は紫外線で発光するため視認性に優れ、歩行者や他の車のドライバーなどからの視認性が高まり、安全性の向上にもつながる。
意匠性物質として再帰反射粒子を用いると、例えば、光源からポリウレタンフォーム層に入射する光を光源に対して反射することができるため、タイヤの意匠性がより高まる。
本発明において、カラーフロップ性粒子とは、角度や距離によって色調を変化させる性質を有する粒子をいう。意匠性物質としてカラーフロップ性粒子を用いると、例えば、タイヤを見る角度やタイヤからの距離によって色調が変化するため、タイヤの意匠性がより高まる。
本発明において、クロミック材料とは、例えば、温度、水分、光(例えば紫外線)などの外部刺激によって色が変化ないし発色する材料をいう。意匠性物質としてクロミック材料を用いると、例えば、上述した外部刺激によって色が変化ないし発色するため、タイヤの意匠性がより高まる。
前記意匠性物質が、カーボンブラック、顔料、金属微粒子、蓄光性粉末、蛍光性粉末、再帰反射粒子、カラーフロップ性粒子およびクロミック材料からなる群より選択されることが好ましい。
これにより、タイヤの外観がより向上する。
前記意匠性物質が、顔料、金属微粒子、蓄光性粉末、蛍光性粉末、再帰反射粒子、カラーフロップ性粒子およびクロミック材料からなる群より選択されることが好ましい。
これにより、タイヤの意匠性がより高まる。
前記意匠性物質が、顔料、金属微粒子、蓄光性粉末、蛍光性粉末、再帰反射粒子、カラーフロップ性粒子およびクロミック材料からなる群より選択される。
これにより、タイヤの外観が向上する。
ポリウレタンフォーム層は、上述した成分以外に、触媒、消泡剤、発泡剤、界面活性剤、硬化剤などを、本発明の趣旨に反しない範囲で含んでいてもよい。
ポリウレタンフォーム層の調製方法は、特に限定されず、例えば、ポリオールおよびポリイソシアネート、ならびに任意に、触媒、消泡剤、発泡剤、意匠性物質、バインダーなどを有する発泡原液を発泡成形してポリウレタンフォームを得ることができる。発泡原液を発泡成形してポリウレタンフォームを得る方法は、特に限定されず、例えば、特開2011-079232号公報に記載の方法など、公知の方法を用いることができる。
これにより、より効果的にタイヤの外観を向上することができる。
<ゴム成分(A)>
天然ゴム(NR):RSS#3
ブタジエンゴム(BR):宇部興産社製の商品名「UBEPOL BR(登録商標)150L」
臭素化ブチルゴム(Br-IIR):高粘度ブチル、エクソン社製の商品名「ブロモブチル2255」
イソブチレン-p-メチルスチレン共重合ゴムの臭素化物:エクソン社製の商品名「Exxpro 3745」
<フィラー>
クレー(層状又は板状粘土鉱物(B)):J.M.Huber社製の商品名「Polyfil DL」、平均アスペクト比=20、平均粒径=3.2μm
カーボンブラック:旭カーボン社製の商品名「旭#55」
<その他>
加硫促進剤(DM):ジ-2-ベンゾチアゾリルジスルフィド、大内新興化学工業社製の商品名「ノクセラー(登録商標)DM」
加硫促進剤(DM):ジ-2-ベンゾチアゾリルジスルフィド、大内新興化学工業社製の商品名「ノクセラー(登録商標)DM」
加硫促進剤(CZ):N-シクロヘキシル-2-ベンゾチアゾリルスルフェンアミド、大内新興化学工業社製の商品名「ノクセラー(登録商標)CZ」
プロセスオイル1:三共油化工業社製の商品名「A/O MIX.(登録商標)」
プロセスオイル2:新日本石油社製の商品名「ブローンアスファルト 10-20」
グリセリン脂肪酸エステル組成物(加工性改良剤(C)):国際公開第2014/185545号の製造例1に記載の方法に従い、脂肪酸をオクタン酸から同モル量のパーム由来硬化脂肪酸に変えて合成し、さらに分子蒸留することで調製したグリセリン脂肪酸エステル組成物、グリセリン脂肪酸モノエステル含有率=97質量%、構成脂肪酸の54質量%がステアリン酸で且つ42質量%がパルミチン酸、4質量%がその他脂肪酸
ブリヂストンケミテック社製の商品名「エバーライト(登録商標)HZCD」、独立気泡構造、セル径=350μm、厚さ2mmにおける通気量=150cc/cm2/sec
・バインダー
アクリル系樹脂:エネックス社製の商品名「BS050301-1」、アクリルエマルジョン
・意匠性物質
顔料:御国色素社製の商品名「GPホワイト#101」、白色顔料
天然ゴム(NR):RSS#3、40質量部
ブタジエンゴム(BR):JSR社製の商品名「JSR BR01」、60質量部
カーボンブラック:N339、27質量部
シリカ:東ソー・シリカ社製の商品名「ニプシル(登録商標) AQ」、27質量部
シランカップリング剤:2.5質量部
プロセスオイル:15質量部
老化防止剤:大内新興化学工業社製の商品名「ノクラック(登録商標) 6C」、3質量部
ステアリン酸:2質量部
酸化亜鉛:3質量部
硫黄:1.5質量部
加硫促進剤(DPG):0.8質量部
加硫促進剤(DM):1質量部
加硫促進剤(NS):1質量部
実施例1~4および比較例1では、製造直後のゴムサンプルと、製造後18日間、屋外に放置したゴムサンプルとについて、色差計を用いてL値を測定した。その結果を表2に示す。L値の値が高いほど、ポリウレタンフォーム層の白色部分がより白いことを示す。また、初期のL値と18日後のL値の差が小さいほど、ポリウレタンフォーム層の白色部分の変色が少なく、茶色変色抑制性に優れることを示す。
実施例2、4および比較例1では、ゴムサンプルについて、厚さ5mmずつのゴムサンプルを共架橋させ、1インチ幅で10cmに打ち抜き、持ち手部分を備えたT字型サンプルによって、接着性を試験し、以下の基準で評価した。基準Aが最も接着性に優れることを示す。基準Cでも実際の使用では問題ない。
基準A:85 N/inch以上
基準B:70 N/inch以上85 N/inch未満
基準C:70 N/inch未満
Claims (18)
- ポリウレタンフォーム層が、バリア層を介してタイヤの外層に積層されており、
前記ポリウレタンフォーム層が、ポリウレタンフォームを含み、
前記バリア層が、ゴム成分(A)としてブチルゴムを含有するゴム組成物から形成されており、
前記ゴム組成物が、イソブチレン-p-メチルスチレン共重合ゴムの臭素化物を含有する、タイヤ。 - ポリウレタンフォーム層が、バリア層を介してタイヤの外層に積層されており、
前記ポリウレタンフォーム層が、ポリウレタンフォームを含み、
前記バリア層が、ゴム成分(A)としてブチルゴムを含有するゴム組成物から形成されており、
前記ゴム組成物が、層状又は板状粘土鉱物(B)を含有する、タイヤ。 - ポリウレタンフォーム層が、バリア層を介してタイヤの外層に積層されており、
前記ポリウレタンフォーム層が、ポリウレタンフォームを含み、
前記バリア層が、ゴム成分(A)としてブチルゴムを含有するゴム組成物から形成されており、
前記ポリウレタンフォーム層が、意匠性物質を含む、タイヤ。 - 前記ポリウレタンフォーム層において、バインダーが前記ポリウレタンフォームに結合している、請求項1~3のいずれか一項に記載のタイヤ。
- 前記意匠性物質が、カーボンブラック、顔料、金属微粒子、蓄光性粉末、蛍光性粉末、再帰反射粒子、カラーフロップ性粒子およびクロミック材料からなる群より選択される、請求項3に記載のタイヤ。
- 前記ポリウレタンフォームのセル径が、500μm以下であり、
前記意匠性物質が、カーボンブラック、顔料、金属微粒子、蓄光性粉末、蛍光性粉末、再帰反射粒子、カラーフロップ性粒子およびクロミック材料からなる群より選択される、請求項3に記載のタイヤ。 - 前記ポリウレタンフォームのセル径が、500μm以上であり、
前記意匠性物質が、顔料、金属微粒子、蓄光性粉末、蛍光性粉末、再帰反射粒子、カラーフロップ性粒子およびクロミック材料からなる群より選択される、請求項3に記載のタイヤ。 - 前記ポリウレタンフォームの通気量が、厚さ2mmにおいて30~500cc/cm2/secである、請求項1~7のいずれか一項に記載のタイヤ。
- 前記ポリウレタンフォーム層において、バインダーが前記ポリウレタンフォームに結合しており、
前記意匠性物質が、前記バインダーを介して前記ポリウレタンフォームに担持されている、請求項3、5~7のいずれか一項に記載のタイヤ。 - 前記ポリウレタンフォーム層において、バインダーが前記ポリウレタンフォームに結合しており、
前記バインダーが、ウレタン系樹脂およびアクリル系樹脂からなる群より選択される1種以上である、請求項1~9のいずれか一項に記載のタイヤ。 - 前記カーボンブラックが、ファーネスブラックからなる群より選択される1種以上である、請求項5または6に記載のタイヤ。
- 前記ポリウレタンフォーム層が、意匠性物質を含み、
前記意匠性物質が、粒子を含み、当該粒子の最大径が、250μm以下である、請求項1~11のいずれか一項に記載のタイヤ。 - 2以上の異なる前記ポリウレタンフォーム層が、積層されておよび/または組み合わされて、タイヤの外層に積層されている、請求項1~12のいずれか一項に記載のタイヤ。
- 前記外層が、サイドウォール部の外層である、請求項1~13のいずれか一項に記載のタイヤ。
- 前記ゴム組成物が、層状又は板状粘土鉱物(B)と、加工性改良剤(C)又は不飽和カルボン酸の金属塩(E)の少なくとも一方と、をさらに含み、
ステアリン酸(D)を含まない、又は該ステアリン酸(D)の含有量が、前記ゴム成分(A)100質量部に対して0.1質量部以下である、請求項1~14のいずれか一項に記載のタイヤ。 - 前記加工性改良剤(C)および不飽和カルボン酸の金属塩(E)を含む、請求項15に記載のタイヤ。
- 前記加工性改良剤(C)が、グリセリン脂肪酸エステル組成物およびステアリルアミン誘導体からなる群より選択される少なくとも一種である、請求項15または16に記載のタイヤ。
- 前記不飽和カルボン酸の金属塩(E)が、アクリル酸金属塩、メタクリル酸金属塩から選択される少なくとも一種である、請求項15~17のいずれか一項に記載のタイヤ。
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