JP2017509751A - 変性共役ジエン系重合体、これを含む変性ゴム組成物および変性共役ジエン系重合体の製造方法 - Google Patents
変性共役ジエン系重合体、これを含む変性ゴム組成物および変性共役ジエン系重合体の製造方法 Download PDFInfo
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- JP2017509751A JP2017509751A JP2016556283A JP2016556283A JP2017509751A JP 2017509751 A JP2017509751 A JP 2017509751A JP 2016556283 A JP2016556283 A JP 2016556283A JP 2016556283 A JP2016556283 A JP 2016556283A JP 2017509751 A JP2017509751 A JP 2017509751A
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- conjugated diene
- diene polymer
- modified conjugated
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Classifications
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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
- C08C19/30—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
-
- 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
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- 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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- 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
-
- 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
- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
- C08F297/02—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type
- C08F297/04—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type polymerising vinyl aromatic monomers and conjugated dienes
- C08F297/044—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type polymerising vinyl aromatic monomers and conjugated dienes using a coupling agent
-
- 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
- C08F8/00—Chemical modification by after-treatment
- C08F8/42—Introducing metal atoms or metal-containing groups
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- 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
- 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
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Abstract
Description
それぞれ10、10、20Lのオートクレーブ反応器3つが直列に連結された連続反応器の第1反応器に、それぞれ、60%のスチレン溶液421g/h、60%の1,3−ブタジエン溶液1200g/h、ノルマルヘキサン3800g/h、極性添加剤として3%の2,2−ビス(2−テトラヒドロフルフリル)プロパン溶液を84g/h、開始剤として1%のノルマルブチルリチウム溶液を60g/hの速度で注入した。この時、第1反応器の温度は65℃となるように維持し、滞留時間は20分となるようにした。
それぞれ10、10、20Lのオートクレーブ反応器3つが直列に連結された連続反応器の第1反応器に、それぞれ、60%のスチレン溶液421g/h、60%の1,3−ブタジエン溶液1200g/h、ノルマルヘキサン3800g/h、極性添加剤として3%の2,2−ビス(2−テトラヒドロフルフリル)プロパン溶液を84g/h、開始剤として1%のノルマルブチルリチウム溶液を60g/hの速度で注入した。この時、第1反応器の温度は65℃となるように維持し、滞留時間は20分となるようにした。
(株)LG化学の未変性共役ジエン系重合体2550Hに対する分析結果を下記表1に示した。
b:1,2−ビス(トリエトキシシリル)−1,2−ジ(ブロモ−ポリスチレン−ブタジエン)エタン
製造例1〜2、および比較製造例1:ゴム組成物の製造
前記表1に示した試料のうち、A、BおよびCを原料ゴムとして、下記表2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の共役ジエン系重合体ゴム組成物を製造した。
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。加硫ゴムの引張物性は、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(0〜60℃)で変形を変化させて、Tanδを測定した。ペイン効果は、変形0.2%〜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、シリカなど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ている。表3に加硫ゴムの物性を示した。
ゴムの転がり抵抗性(RR)と制動性(wet grip)は、DMTS(Dynamic mechanical thermal spectrometry;GABO、EPLEXOR500N)を用いて測定した。測定時の試験条件は、Frequency:10Hz、Strain(Static strain:3%、Dynamic strain:0.25%)、Temperature:−60〜70℃とした。この時、転がり抵抗性は、60℃で測定されたTanδ値とし、制動性は0℃で測定されたTanδ値とした。この値を、比較例1の値を100基準としてindexで比較した。
Claims (15)
- 下記化学式2で表される変性共役ジエン系重合体:
- a)有機アルカリ金属化合物の存在下、炭化水素溶媒中で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)前記アルカリ金属末端を有する活性重合体を、下記化学式1で表される化合物とカップリングまたは結合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:
- 前記有機アルカリ金属化合物は、前記単量体計100gに対して、0.01〜10mmol使用されることを特徴とする請求項3に記載の変性共役ジエン系重合体の製造方法。
- 前記有機アルカリ金属化合物と、前記化学式1で表される化合物とのモル比は、1:0.1〜1:10であることを特徴とする請求項3に記載の変性共役ジエン系重合体の製造方法。
- 前記ステップa)の重合は、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3に記載の変性共役ジエン系重合体の製造方法。
- 前記極性添加剤は、前記化学式1で表される化合物計1mmolを基準として、0.001〜50g投入されることを特徴とする請求項8に記載の変性共役ジエン系重合体の製造方法。
- 前記変性共役ジエン系重合体100重量部に対して、請求項1に記載の変性共役ジエン系重合体10〜100重量部、および無機充填剤0.1〜200重量部を含む変性共役ジエン系重合体ゴム組成物。
- 前記無機充填剤は、カーボンブラックおよびシリカ系充填剤のうちの1種以上であることを特徴とする請求項13に記載の変性共役ジエン系重合体ゴム組成物。
- 請求項13に記載の変性共役ジエン系重合体ゴム組成物を含むタイヤまたはタイヤトレッド。
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