JP6476179B2 - 変性共役ジエン系重合体、その製造方法、およびこれを含むゴム組成物 - Google Patents
変性共役ジエン系重合体、その製造方法、およびこれを含むゴム組成物 Download PDFInfo
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- JP6476179B2 JP6476179B2 JP2016529734A JP2016529734A JP6476179B2 JP 6476179 B2 JP6476179 B2 JP 6476179B2 JP 2016529734 A JP2016529734 A JP 2016529734A JP 2016529734 A JP2016529734 A JP 2016529734A JP 6476179 B2 JP6476179 B2 JP 6476179B2
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- conjugated diene
- diene polymer
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- monomer
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- 238000000034 method Methods 0.000 title claims description 12
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- 125000004432 carbon atom Chemical group C* 0.000 claims description 18
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- 239000000654 additive Substances 0.000 claims description 9
- 230000000996 additive effect Effects 0.000 claims description 9
- 125000005103 alkyl silyl group Chemical group 0.000 claims description 9
- 125000002947 alkylene group Chemical group 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 229910052783 alkali metal Inorganic materials 0.000 claims description 8
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- 238000004458 analytical method Methods 0.000 description 7
- -1 methylamino, dimethylamino, ethylamino, propylamino, butylamino Chemical group 0.000 description 7
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- CBXRMKZFYQISIV-UHFFFAOYSA-N 1-n,1-n,1-n',1-n',2-n,2-n,2-n',2-n'-octamethylethene-1,1,2,2-tetramine Chemical compound CN(C)C(N(C)C)=C(N(C)C)N(C)C CBXRMKZFYQISIV-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
- FZLHAQMQWDDWFI-UHFFFAOYSA-N 2-[2-(oxolan-2-yl)propan-2-yl]oxolane Chemical compound C1CCOC1C(C)(C)C1CCCO1 FZLHAQMQWDDWFI-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
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- 150000002902 organometallic compounds Chemical class 0.000 description 2
- 229920002959 polymer blend Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- PMJHHCWVYXUKFD-SNAWJCMRSA-N (E)-1,3-pentadiene Chemical group C\C=C\C=C PMJHHCWVYXUKFD-SNAWJCMRSA-N 0.000 description 1
- SEPPVOUBHWNCAW-FNORWQNLSA-N (E)-4-oxonon-2-enal Chemical compound CCCCCC(=O)\C=C\C=O SEPPVOUBHWNCAW-FNORWQNLSA-N 0.000 description 1
- VDNSZPNSUQRUMS-UHFFFAOYSA-N 1-cyclohexyl-4-ethenylbenzene Chemical compound C1=CC(C=C)=CC=C1C1CCCCC1 VDNSZPNSUQRUMS-UHFFFAOYSA-N 0.000 description 1
- JZHGRUMIRATHIU-UHFFFAOYSA-N 1-ethenyl-3-methylbenzene Chemical compound CC1=CC=CC(C=C)=C1 JZHGRUMIRATHIU-UHFFFAOYSA-N 0.000 description 1
- VVTGQMLRTKFKAM-UHFFFAOYSA-N 1-ethenyl-4-propylbenzene Chemical compound CCCC1=CC=C(C=C)C=C1 VVTGQMLRTKFKAM-UHFFFAOYSA-N 0.000 description 1
- OIEANVCCDIRIDJ-UHFFFAOYSA-N 1-ethenyl-5-hexylnaphthalene Chemical compound C1=CC=C2C(CCCCCC)=CC=CC2=C1C=C OIEANVCCDIRIDJ-UHFFFAOYSA-N 0.000 description 1
- MDRVHDXASYPUCB-UHFFFAOYSA-N 1-methyl-4-(2-phenylethenyl)benzene Chemical compound C1=CC(C)=CC=C1C=CC1=CC=CC=C1 MDRVHDXASYPUCB-UHFFFAOYSA-N 0.000 description 1
- IGGDKDTUCAWDAN-UHFFFAOYSA-N 1-vinylnaphthalene Chemical compound C1=CC=C2C(C=C)=CC=CC2=C1 IGGDKDTUCAWDAN-UHFFFAOYSA-N 0.000 description 1
- NUNQKTCKURIZQX-UHFFFAOYSA-N 2-(2-ethoxyethoxy)-2-methylpropane Chemical compound CCOCCOC(C)(C)C NUNQKTCKURIZQX-UHFFFAOYSA-N 0.000 description 1
- GTEXIOINCJRBIO-UHFFFAOYSA-N 2-[2-(dimethylamino)ethoxy]-n,n-dimethylethanamine Chemical compound CN(C)CCOCCN(C)C GTEXIOINCJRBIO-UHFFFAOYSA-N 0.000 description 1
- CSBDTEMAXHVRBB-UHFFFAOYSA-N 2-ethoxy-n,n-dimethylethanamine Chemical compound CCOCCN(C)C CSBDTEMAXHVRBB-UHFFFAOYSA-N 0.000 description 1
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- LLBZPESJRQGYMB-UHFFFAOYSA-N 4-one Natural products O1C(C(=O)CC)CC(C)C11C2(C)CCC(C3(C)C(C(C)(CO)C(OC4C(C(O)C(O)C(COC5C(C(O)C(O)CO5)OC5C(C(OC6C(C(O)C(O)C(CO)O6)O)C(O)C(CO)O5)OC5C(C(O)C(O)C(C)O5)O)O4)O)CC3)CC3)=C3C2(C)CC1 LLBZPESJRQGYMB-UHFFFAOYSA-N 0.000 description 1
- UGWOAPBVIGCNOV-UHFFFAOYSA-N 5-ethenyldec-5-ene Chemical compound CCCCC=C(C=C)CCCC UGWOAPBVIGCNOV-UHFFFAOYSA-N 0.000 description 1
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 1
- QEPZKFCQGIUWED-UHFFFAOYSA-N C=CC(C)=C.[Li] Chemical compound C=CC(C)=C.[Li] QEPZKFCQGIUWED-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 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 1
- NHTMVDHEPJAVLT-UHFFFAOYSA-N Isooctane Chemical compound CC(C)CC(C)(C)C NHTMVDHEPJAVLT-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
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- 235000021355 Stearic acid Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 125000003282 alkyl amino group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 238000010539 anionic addition polymerization reaction Methods 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 125000001769 aryl amino group Chemical group 0.000 description 1
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- 239000002585 base Substances 0.000 description 1
- 229960004217 benzyl alcohol Drugs 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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- 229920003244 diene elastomer Polymers 0.000 description 1
- JVSWJIKNEAIKJW-UHFFFAOYSA-N dimethyl-hexane Natural products CCCCCC(C)C JVSWJIKNEAIKJW-UHFFFAOYSA-N 0.000 description 1
- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 description 1
- POLCUAVZOMRGSN-UHFFFAOYSA-N dipropyl ether Chemical compound CCCOCCC POLCUAVZOMRGSN-UHFFFAOYSA-N 0.000 description 1
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- 239000012535 impurity Substances 0.000 description 1
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- 125000005184 naphthylamino group Chemical group C1(=CC=CC2=CC=CC=C12)N* 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
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- 229920002223 polystyrene Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000010421 standard material Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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- 239000011787 zinc oxide Substances 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0016—Compositions of the tread
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/02—Hydrogenation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/22—Incorporating nitrogen atoms into the molecule
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/25—Incorporating silicon atoms into the molecule
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/26—Incorporating metal atoms into the molecule
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/30—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule
- C08C19/42—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups
- C08C19/44—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups of polymers containing metal atoms exclusively at one or both ends of the skeleton
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/10—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl-aromatic monomers
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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- C—CHEMISTRY; METALLURGY
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Description
本発明者らは、タイヤトレッドの材料として、優れた発熱性を有すると同時に、引張強度、耐磨耗性、ウェット路面抵抗性を有するゴムを開発するために、本発明を提案するに至った。
本発明の変性共役ジエン系重合体の製造方法は、(a)共役ジエン系単量体、または共役ジエン系単量体と芳香族ビニル系単量体とを、炭化水素溶媒下、下記化学式1で表される化合物を用いて重合させて、アルカリ金属末端を有する活性重合体を形成するステップと、(b)前記活性重合体を、下記化学式2で表される化合物とカップリングまたは反応させるステップとを含む。
前記化学式1において、Mはアルカリ金属で、リチウム、ナトリウム、カリウム、ルビジウム、およびセシウムからなる群より選択された1種であってもよい。
一例として、前記変性共役ジエン系重合体ゴム組成物は、前記変性共役ジエン系重合体10〜100重量部、および前記変性共役ジエン系重合体100重量部に対して、無機充填剤0.1〜200重量部を含む。
20Lオートクレーブ反応器に、スチレン270g、1,3−ブタジエン710g、およびノルマルヘキサン5000g、極性添加剤として2,2−ビス(2−オキソラニル)プロパン0.9gを入れた後、反応器の内部温度を40℃に昇温した。反応器の内部温度が40℃に到達した時、3−(ジメチルアミノ)−1−プロピルリチウム−(イソプレン)24.3mmolを反応器に投入して断熱昇温反応を進行させた。断熱昇温反応が終わった後、約20分経過後、1,3−ブタジエン20gを投入した。5分後、ビス(トリエトキシシリルプロピル)−N−メチルアミン4.3mmolを投入して15分間反応させた。以後、エタノールを用いて重合反応を停止し、酸化防止剤のBHT(ブチレーテッドヒドロキシトルエン)がヘキサンに0.3重量%溶けている溶液45mlを添加した。
3つの反応器を用意するが、3つの反応器のうち、1基目および2基目の反応器を重合反応器とし、3基目の反応器を変性反応器とした。
開始剤としてn−ブチルリチウム4mmolを投入したことを除いては、前記実施例1と同様に実施して、変性共役ジエン系重合体を製造した。このように製造された変性共役ジエン系重合体に対する分析結果を下記表1に示した。
最も多く市販されている未変性共役ジエン系重合体(5025−2HM grade、LANXESS Deutschland GmbH製造)に対する分析結果を下記表1に示した。前記未変性共役ジエン系重合体(TUFDENETM3835)に対しては、RAEオイルを用いた。
開始剤としてn−ブチルリチウム39.57mmol/hを投入したことを除いては、前記実施例2と同様に実施して、変性共役ジエン系重合体を製造した。このように製造された変性共役ジエン系重合体に対する分析結果を下記表2に示した。
最も多く市販されている未変性共役ジエン系重合体(5025−2HM grade、LANXESS Deutschland GmbH製造)に対する分析結果を下記表2に示した。
前記未変性共役ジエン系重合体(TUFDENETM3835)に対しては、TDAEオイルの代わりにRAEオイルを用いた。
イ)ムーニー粘度:ALPHA Technologies社のMV−2000を用い、試験片重量15g以上の2つを用いて1分間予熱した後、100℃で4分間測定した。
ロ)スチレンモノマー(SM)およびビニル(Vinyl)含有量:NMRを用いて測定した。
ハ)重量平均分子量(Mw)、数平均分子量(Mn)、および分子量分布度(PDI):40℃の条件下、GPC分析で測定した。この時、カラム(Column)はPolymer Laboratories社のPLgel Olexisカラム2本とPLgel mixed−Cカラム1本とを組み合わせ、新たに入れ替えたカラムはいずれもmixed bedタイプのカラムを用いた。また、分子量計算時、GPC基準物質(Standard material)としてPS(Polystyrene)を用いた。
前記表1および表2に示した試料A、B、C、D、EおよびFを原料ゴムとして、下記表3に示した配合条件で配合して、製造例1〜2、および比較製造例1〜4の共役ジエン系重合体ゴム組成物を製造した。表2中の原料の単位はゴム100重量部基準phrである。
1)引張実験
ASTM412の引張試験法によって、試験片の切断時の引張強度および300%伸張時の引張応力(300%モジュラス)を測定した。このために、Instron社のUniversal Test Machine4204引張試験機を用いており、室温で50cm/minの引張速度で測定して、引張強度、Modulus、伸び率などの測定値を得た。
TA社の動的機械分析機を用いた。ねじれモードで、周波数10Hz、各測定温度(−60〜60℃)で変形を変化させてTanδを測定した。ペイン効果は、変形0.28%〜40%での最小値と最大値との差で示した。ペイン効果が小さいほど、シリカ等充填剤の分散性が良い。低温0℃のTanδが高いほど、ウェット路面抵抗性に優れ、高温60℃のTanδが低いほど、ヒステリシス損失が少なく、タイヤの低転がり抵抗性、すなわち低燃費性に優れる。表4および表5に加硫ゴムの物性を示した。
Claims (12)
- (a)共役ジエン系単量体、または共役ジエン系単量体と芳香族ビニル系単量体とを、炭化水素溶媒下、3−ジメチルアミノ−1−プロピルリチウム−(イソプレン) 2 を用いて重合させて、アルカリ金属末端を有する活性重合体を形成するステップと、
(b)前記活性重合体を、下記化学式2で表される化合物とカップリングまたは反応させるステップとを含む変性共役ジエン系重合体の製造方法:
- 前記3−ジメチルアミノ−1−プロピルリチウム−(イソプレン) 2 が、前記単量体計100gを基準として、0.01〜10mmol用いられることを特徴とする請求項1に記載の変性共役ジエン系重合体の製造方法。
- 前記3−ジメチルアミノ−1−プロピルリチウム−(イソプレン) 2 と、前記化学式5で表される化合物とのモル比が、1:0.1〜1:10であることを特徴とする請求項1に記載の変性共役ジエン系重合体の製造方法。
- 前記(a)の重合ステップにおいて、極性添加剤がさらに投入されることを特徴とする請求項1に記載の変性共役ジエン系重合体の製造方法。
- 前記極性添加剤が、前記化学式1で表される化合物計1mmolを基準として、0.001〜10g投入されることを特徴とする請求項1に記載の変性共役ジエン系重合体の製造方法。
- 1,000〜2,000,000g/molの数平均分子量(Mn)を有することを特徴とする請求項7に記載の変性共役ジエン系重合体。
- ビニル含有量が10重量%以上であることを特徴とする請求項7に記載の変性共役ジエン系重合体。
- 共役ジエン系単量体の単独重合体、または共役ジエン系単量体と芳香族ビニル系単量体との共重合体由来のものであることを特徴とする請求項7に記載の変性共役ジエン系重合体。
- 共役ジエン系単量体と芳香族ビニル系単量体とを合わせた計100重量%を基準として、芳香族ビニル系単量体が0.0001〜50重量%含まれていることを特徴とする請求項7に記載の変性共役ジエン系重合体。
- 40以上のムーニー粘度を有することを特徴とする請求項7に記載の変性共役ジエン系重合体。
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