JP2016155970A - Rubber composition for tire for heavy load and/or construction vehicle and pneumatic tire using the same - Google Patents
Rubber composition for tire for heavy load and/or construction vehicle and pneumatic tire using the same Download PDFInfo
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- JP2016155970A JP2016155970A JP2015036169A JP2015036169A JP2016155970A JP 2016155970 A JP2016155970 A JP 2016155970A JP 2015036169 A JP2015036169 A JP 2015036169A JP 2015036169 A JP2015036169 A JP 2015036169A JP 2016155970 A JP2016155970 A JP 2016155970A
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- 239000000203 mixture Substances 0.000 title claims abstract description 33
- 229920001971 elastomer Polymers 0.000 title claims abstract description 31
- 239000005060 rubber Substances 0.000 title claims abstract description 31
- 238000010276 construction Methods 0.000 title claims abstract description 19
- 150000002989 phenols Chemical class 0.000 claims abstract description 31
- 239000006229 carbon black Substances 0.000 claims abstract description 18
- -1 styrenated phenol compound Chemical class 0.000 claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920003244 diene elastomer Polymers 0.000 claims abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- 238000001179 sorption measurement Methods 0.000 claims abstract description 8
- 244000043261 Hevea brasiliensis Species 0.000 claims description 9
- 229920003052 natural elastomer Polymers 0.000 claims description 9
- 229920001194 natural rubber Polymers 0.000 claims description 9
- 229920003049 isoprene rubber Polymers 0.000 claims description 7
- 239000005062 Polybutadiene Substances 0.000 claims description 6
- 229920002857 polybutadiene Polymers 0.000 claims description 6
- 238000002156 mixing Methods 0.000 abstract description 15
- 238000004073 vulcanization Methods 0.000 abstract description 8
- 230000020169 heat generation Effects 0.000 abstract description 7
- 230000002708 enhancing effect Effects 0.000 abstract 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 235000019241 carbon black Nutrition 0.000 description 15
- BYLSIPUARIZAHZ-UHFFFAOYSA-N 2,4,6-tris(1-phenylethyl)phenol Chemical class C=1C(C(C)C=2C=CC=CC=2)=C(O)C(C(C)C=2C=CC=CC=2)=CC=1C(C)C1=CC=CC=C1 BYLSIPUARIZAHZ-UHFFFAOYSA-N 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 239000004636 vulcanized rubber Substances 0.000 description 2
- NVZWEEGUWXZOKI-UHFFFAOYSA-N 1-ethenyl-2-methylbenzene Chemical compound CC1=CC=CC=C1C=C NVZWEEGUWXZOKI-UHFFFAOYSA-N 0.000 description 1
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 description 1
- APMOEFCWQRJOPS-UHFFFAOYSA-N 5-ethenyl-1,5-dimethylcyclohexa-1,3-diene Chemical compound CC1=CC=CC(C)(C=C)C1 APMOEFCWQRJOPS-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 125000005370 alkoxysilyl 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
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 229940125904 compound 1 Drugs 0.000 description 1
- 229940125782 compound 2 Drugs 0.000 description 1
- 229940126214 compound 3 Drugs 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 125000001181 organosilyl group Chemical group [SiH3]* 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
本発明は、重荷重および／または建設車両用タイヤ用ゴム組成物およびそれを用いた空気入りタイヤに関するものであり、詳しくは、操縦安定性、発熱性、耐偏摩耗性および加工性をいずれも同時に改善し得る重荷重および／または建設車両用タイヤ用ゴム組成物およびそれを用いた空気入りタイヤに関するものである。 TECHNICAL FIELD The present invention relates to a heavy load and / or a rubber composition for tires for construction vehicles and a pneumatic tire using the rubber composition, and more specifically, all of steering stability, heat generation, uneven wear resistance and workability. The present invention relates to a rubber composition for tires for heavy loads and / or construction vehicles that can be improved at the same time, and a pneumatic tire using the same.
舗装路を走行する空気入りタイヤ、とくにトラックやバスのような重荷重用空気入りタイヤや建設車両用空気入りタイヤは、高い荷重を受けて走行する為、偏摩耗が生じる場合がある。偏摩耗の抑制には、タイヤキャップトレッドの硬度を高くすることが有効であり、そのため１）カーボンブラックの増量、２）カーボンブラックの小粒径化等の手段が講じられている。しかしこれらの手法ではゴムのｔａｎδ（６０℃）が上昇してしまい、発熱性が悪化するという問題点がある。また、加硫前のゴム組成物は加工性向上のため粘度が低いことが好ましい。 Pneumatic tires that run on paved roads, particularly heavy duty pneumatic tires such as trucks and buses, and construction vehicle pneumatic tires run under high loads, and therefore may cause uneven wear. In order to suppress uneven wear, it is effective to increase the hardness of the tire cap tread. Therefore, measures such as 1) increasing the amount of carbon black and 2) reducing the particle size of carbon black are taken. However, these methods have a problem that the tan δ (60 ° C.) of the rubber is increased and the heat generation is deteriorated. Further, the rubber composition before vulcanization preferably has a low viscosity for improving processability.
なお下記特許文献１には、ゴム材料と特定構造のメチレンビス（アルキルスルフィド）およびフェノール系酸化防止剤等から選ばれる劣化防止剤とを混合する技術が開示されている。しかし特許文献１には、下記で説明する本発明のスチレン化フェノール化合物については開示も示唆もない。また、特定のスチレン化フェノール化合物を用い、操縦安定性、発熱性、耐偏摩耗性および加工性をいずれも同時に改善し、これを重荷重および／または建設車両用のタイヤ、とくにキャップトレッドに用いようとする技術思想は何ら開示されていない。 Patent Document 1 listed below discloses a technique in which a rubber material is mixed with a deterioration inhibitor selected from methylene bis (alkyl sulfide) having a specific structure and a phenolic antioxidant. However, Patent Document 1 does not disclose or suggest the styrenated phenol compound of the present invention described below. In addition, using specific styrenated phenolic compounds, steering stability, heat generation, uneven wear resistance and workability are all improved at the same time, and this is used for heavy load and / or construction vehicle tires, especially cap treads. No technical idea to be disclosed is disclosed.
本発明の目的は、操縦安定性、発熱性、耐偏摩耗性および加工性をいずれも同時に改善し得る重荷重および／または建設車両用タイヤ用ゴム組成物およびそれを用いた空気入りタイヤを提供することにある。 An object of the present invention is to provide a heavy load and / or a rubber composition for tires for construction vehicles that can simultaneously improve handling stability, heat generation, uneven wear resistance, and workability, and a pneumatic tire using the same. There is to do.
本発明者らは鋭意研究を重ねた結果、特定の組成のジエン系ゴムに対し、特定の特性を有するカーボンブラックおよび特定の構造を有する化合物を特定量で配合することにより、上記課題を解決できることを見出し、本発明を完成することができた。
すなわち本発明は以下のとおりである。
１．天然ゴムおよび／または合成イソプレンゴムを６０〜１００質量部およびブタジエンゴムを０〜４０質量部含むジエン系ゴム１００質量部に対し、窒素吸着比表面積（Ｎ２ＳＡ）が１００〜１８０ｍ２／ｇのカーボンブラックを４０〜７０質量部およびジスチレン化フェノールまたはトリスチレン化フェノールを主成分とするスチレン化フェノール化合物を０．５〜２０質量部配合してなることを特徴とする重荷重および／または建設車両用タイヤ用ゴム組成物。
２．前記１に記載のゴム組成物をキャップトレッドに使用した重荷重および／または建設車両用空気入りタイヤ。
As a result of intensive studies, the present inventors can solve the above problems by blending a specific amount of carbon black having a specific characteristic and a compound having a specific structure with a diene rubber having a specific composition. The present invention was completed.
That is, the present invention is as follows.
1. The nitrogen adsorption specific surface area (N 2 SA) is 100 to 180 m 2 / g with respect to 100 parts by mass of diene rubber containing 60 to 100 parts by mass of natural rubber and / or synthetic isoprene rubber and 0 to 40 parts by mass of butadiene rubber. Heavy load and / or construction vehicle comprising 40 to 70 parts by mass of carbon black and 0.5 to 20 parts by mass of a styrenated phenol compound mainly composed of distyrenated phenol or tristyrenated phenol Rubber composition for tires.
2. A heavy load and / or a pneumatic tire for construction vehicles, wherein the rubber composition according to 1 is used for a cap tread.
本発明によれば、特定の組成のジエン系ゴムに対し、特定の特性を有するカーボンブラックおよび特定の構造を有するスチレン化フェノール化合物を特定量で配合したので、操縦安定性、発熱性、耐偏摩耗性および加工性をいずれも同時に改善し得る重荷重および／または建設車両用タイヤ用ゴム組成物およびそれを用いた空気入りタイヤを提供することができる。 According to the present invention, since a specific amount of carbon black having a specific characteristic and a styrenated phenol compound having a specific structure are blended with a diene rubber having a specific composition, steering stability, heat build-up, bias resistance It is possible to provide a heavy load and / or a rubber composition for construction vehicle tires and a pneumatic tire using the same, which can simultaneously improve both wear and workability.
以下、本発明をさらに詳細に説明する。
（ジエン系ゴム）
本発明で使用されるジエン系ゴムは、天然ゴム（ＮＲ）および／または合成イソプレンゴム（ＩＲ）を必須成分とする。ＮＲおよび／またはＩＲの配合量は、ジエン系ゴム全体を１００質量部としたときに６０質量部以上であることが必要であり、６５質量部以上であることが好ましい。ＮＲおよび／またはＩＲの配合量が６５質量部未満であると、耐カット性・チッピング性が悪化し、好ましくない。なお、ＮＲおよびＩＲ以外の他のジエン系ゴムも用いることができ、ジエン系ゴム全体を１００質量部としたときに例えばブタジエンゴム（ＢＲ）を４０質量部以下、好ましくは０．１〜３５質量部配合するのが好ましい。これらは、単独で用いてもよく、２種以上を併用してもよい。また、その分子量やミクロ構造はとくに制限されず、アミン、アミド、シリル、アルコキシシリル、カルボキシル、ヒドロキシル基等で末端変性されていても、エポキシ化されていてもよい。
Hereinafter, the present invention will be described in more detail.
(Diene rubber)
The diene rubber used in the present invention contains natural rubber (NR) and / or synthetic isoprene rubber (IR) as essential components. The blending amount of NR and / or IR needs to be 60 parts by mass or more, preferably 65 parts by mass or more when the whole diene rubber is 100 parts by mass. If the blending amount of NR and / or IR is less than 65 parts by mass, the cut resistance and chipping properties deteriorate, which is not preferable. In addition, other diene rubbers other than NR and IR can be used. When the total diene rubber is 100 parts by mass, for example, butadiene rubber (BR) is 40 parts by mass or less, preferably 0.1 to 35 parts by mass. It is preferable to blend partly. These may be used alone or in combination of two or more. The molecular weight and microstructure are not particularly limited, and may be terminally modified with an amine, amide, silyl, alkoxysilyl, carboxyl, hydroxyl group or the like, or may be epoxidized.
（カーボンブラック）
本発明で使用するカーボンブラックは、窒素吸着比表面積（Ｎ２ＳＡ）が１００〜１８０ｍ２／ｇのカーボンブラックであることが必要であり、本発明の効果が向上するという観点から、105〜150ｍ２／ｇであることが好ましい。窒素吸着比表面積（Ｎ２ＳＡ）が１００ｍ２／ｇ未満であると耐摩耗性が低下し、逆に１８０ｍ２／ｇを超えるとtanδ（60℃）が上昇し、発熱性が悪化する。なお、窒素吸着比表面積（Ｎ２ＳＡ）はＪＩＳ Ｋ６２１７−２に準拠して求めた値である。
(Carbon black)
The carbon black used in the present invention needs to be a carbon black having a nitrogen adsorption specific surface area (N 2 SA) of 100 to 180 m 2 / g. From the viewpoint of improving the effect of the present invention, the carbon black is 105 to 150 m. It is preferable that it is 2 / g. When the nitrogen adsorption specific surface area (N 2 SA) is less than 100 m 2 / g, the wear resistance decreases, and conversely, when it exceeds 180 m 2 / g, tan δ (60 ° C.) increases and the exothermic property deteriorates. The nitrogen adsorption specific surface area (N 2 SA) is a value determined in accordance with JIS K6217-2.
（スチレン化フェノール化合物）
スチレン化フェノール化合物は、下記式で表すことができる。
(Styrenated phenol compound)
The styrenated phenol compound can be represented by the following formula.
本発明で使用されるスチレン化フェノール化合物は、ｎが２であるジスチレン化フェノールまたはｎが３であるトリスチレン化フェノールを主成分とする。本発明で使用されるスチレン化フェノール化合物は、公知の製造方法により製造することができ、また商業的に入手も可能である、市販品としては、例えば三光（株）製ＳＰ−２４（ジスチレン化フェノールを主成分とする）、ＴＳＰ（トリスチレン化フェノールを主成分とする）等が挙げられる。 The styrenated phenol compound used in the present invention is mainly composed of distyrenated phenol in which n is 2 or tristyrenated phenol in which n is 3. The styrenated phenol compound used in the present invention can be produced by a known production method, and is also commercially available. Examples of commercially available products include SP-24 (distyrenated) manufactured by Sanko Co., Ltd. And phenol (mainly phenol), TSP (mainly tristyrenated phenol), and the like.
一般的に製造されたスチレン化フェノール化合物は、フェノール１モルに対してスチレン１モルが付加したモノスチレン化フェノール（上記式中、ｎ＝１）；フェノール１モルに対してスチレン２モルが付加したジスチレン化フェノール（上記式中、ｎ＝２）；フェノール１モルに対してスチレン３モルが付加したトリスチレン化フェノール（上記式中、ｎ＝３）；およびその他の成分の混合物となる。本発明では、これらのスチレン化フェノール化合物のうち、主成分としてジスチレン化フェノールおよびトリスチレン化フェノールを使用する。上述のように製造されたスチレン化フェノール化合物は、主に、モノ、ジおよびトリ体の混合物であるので、本発明で使用されるスチレン化フェノール化合物は、モノ体がある程度存在することができる。したがって本発明で言う、「ジスチレン化フェノールまたはトリスチレン化フェノールを主成分とする」とは、ジスチレン化フェノールまたはトリスチレン化フェノールが全体の５０モル％以上、好ましくは６０モル％以上、さらに好ましくは６５モル％以上を占めることを意味し、それ以外の成分としてモノスチレン化フェノールやその他の成分（例えばテトラ体あるいはそれ以上の付加物のスチレン化フェノール化合物）が含まれていてもよい。 Generally produced styrenated phenol compounds are monostyrenated phenols in which 1 mole of styrene is added to 1 mole of phenol (where n = 1); 2 moles of styrene are added to 1 mole of phenol. This is a mixture of distyrenated phenol (in the above formula, n = 2); tristyrenated phenol in which 3 mol of styrene is added to 1 mol of phenol (in the above formula, n = 3); and other components. In the present invention, among these styrenated phenol compounds, distyrenated phenol and tristyrenated phenol are used as main components. Since the styrenated phenol compound produced as described above is mainly a mixture of mono-, di-, and tri-isomers, the styrenated phenol compound used in the present invention can have some mono-isomers. Therefore, in the present invention, “having distyrenated phenol or tristyrenated phenol as a main component” means that distyrenated phenol or tristyrenated phenol is 50 mol% or more, preferably 60 mol% or more, more preferably It means that it occupies 65 mol% or more, and monostyrenated phenol and other components (for example, a styrenated phenol compound of a tetra-form or more) may be contained as other components.
なお、上記式におけるスチレン部位は、スチレンの誘導体であってもよい。例えば、α−メチルスチレン、ｏ−メチルスチレン、１，３−ジメチルスチレン等が挙げられる。 The styrene moiety in the above formula may be a styrene derivative. For example, α-methylstyrene, o-methylstyrene, 1,3-dimethylstyrene and the like can be mentioned.
（重荷重および／または建設車両用タイヤ用ゴム組成物の配合割合）
本発明の重荷重および／または建設車両用タイヤ用ゴム組成物は、ジエン系ゴム１００質量部に対し、窒素吸着比表面積（Ｎ２ＳＡ）が１００〜１８０ｍ２／ｇのカーボンブラックを４０〜７０質量部およびジスチレン化フェノールまたはトリスチレン化フェノールを主成分とするスチレン化フェノール化合物を０．５〜２０質量部配合してなることを特徴とする。
前記カーボンブラックの配合量が４０質量部未満であると、硬度および耐偏摩耗性が低下する。逆に７０質量部を超えると発熱性が悪化する。
前記スチレン化フェノール化合物の配合量が０．５質量部未満であると、配合量が少な過ぎて本発明の効果を奏することができない。逆に２０質量部を超えると硬度低下および発熱性が悪化する。
(Mixing ratio of heavy load and / or rubber composition for tires for construction vehicles)
The rubber composition for tires for heavy loads and / or construction vehicles of the present invention comprises 40 to 70 carbon blacks having a nitrogen adsorption specific surface area (N 2 SA) of 100 to 180 m 2 / g with respect to 100 parts by mass of the diene rubber. It is characterized by comprising 0.5 to 20 parts by mass of a styrenated phenol compound mainly composed of mass parts and distyrenated phenol or tristyrenated phenol.
When the blending amount of the carbon black is less than 40 parts by mass, hardness and uneven wear resistance are lowered. Conversely, when it exceeds 70 mass parts, exothermic property will deteriorate.
When the blending amount of the styrenated phenol compound is less than 0.5 parts by mass, the blending amount is too small to achieve the effects of the present invention. Conversely, when it exceeds 20 mass parts, a hardness fall and exothermic property will deteriorate.
さらに好ましい前記カーボンブラックの配合量は、ジエン系ゴム１００質量部に対し、45〜65質量部である。
さらに好ましい前記スチレン化フェノール化合物の配合量は、ジエン系ゴム１００質量部に対し、0.6〜15質量部（とくに好ましくは0.6〜10質量部）である。
A more preferable blending amount of the carbon black is 45 to 65 parts by mass with respect to 100 parts by mass of the diene rubber.
The blending amount of the styrenated phenol compound is more preferably 0.6 to 15 parts by mass (particularly preferably 0.6 to 10 parts by mass) with respect to 100 parts by mass of the diene rubber.
（その他成分）
本発明における重荷重および／または建設車両用タイヤ用ゴム組成物には、前記した成分に加えて、加硫又は架橋剤；加硫又は架橋促進剤；酸化亜鉛；老化防止剤；可塑剤；各種充填剤などの重荷重および／または建設車両用タイヤ用ゴム組成物に一般的に配合されている各種添加剤を配合することができ、かかる添加剤は一般的な方法で混練して組成物とし、加硫又は架橋するのに使用することができる。これらの添加剤の配合量も、本発明の目的に反しない限り、従来の一般的な配合量とすることができる。
なお本発明のゴム組成物は、氷上摩擦力を増大させる公知の各種充填剤、例えば珪藻土のような多孔質材料粒子を配合し、スタッドレスタイヤとして利用するのも好適である。
(Other ingredients)
The rubber composition for tires for heavy loads and / or construction vehicles in the present invention includes, in addition to the aforementioned components, a vulcanization or crosslinking agent; a vulcanization or crosslinking accelerator; a zinc oxide; an antiaging agent; a plasticizer; Various additives generally blended in rubber compositions for heavy loads such as fillers and / or tires for construction vehicles can be blended, and such additives are kneaded by a general method to form a composition. Can be used for vulcanization or crosslinking. The blending amounts of these additives can be set to conventional general blending amounts as long as the object of the present invention is not violated.
The rubber composition of the present invention is also suitable for use as a studless tire by blending known various fillers that increase frictional force on ice, for example, porous material particles such as diatomaceous earth.
また本発明の重荷重および／または建設車両用タイヤ用ゴム組成物は、操縦安定性、発熱性、耐偏摩耗性および加工性をいずれも同時に改善し得ることから、トラック、バス等の重荷重用タイヤや、建設車両用空気入りタイヤ（重荷重用を兼ねているタイヤを含む）のキャップトレッドに用いることがとくに好ましい。また本発明のゴム組成物は、従来の空気入りタイヤの製造方法に従って空気入りタイヤを製造することができる。 Further, since the rubber composition for tires for heavy loads and / or construction vehicles of the present invention can simultaneously improve handling stability, heat generation, uneven wear resistance and workability, it can be used for heavy loads such as trucks and buses. It is particularly preferable to use for a tire or a cap tread of a pneumatic tire for construction vehicles (including a tire that also serves as a heavy load). Moreover, the rubber composition of this invention can manufacture a pneumatic tire according to the manufacturing method of the conventional pneumatic tire.
以下、本発明を実施例および比較例によりさらに説明するが、本発明は下記例に制限されるものではない。 EXAMPLES Hereinafter, although an Example and a comparative example further demonstrate this invention, this invention is not restrict | limited to the following example.
標準例、実施例１〜２および比較例１〜４
サンプルの調製
表１に示す配合（質量部）において、加硫促進剤と硫黄を除く成分を１．７リットルの密閉式バンバリーミキサーで５分間混練した後、ゴムをミキサー外に放出し室温冷却した。続いて同バンバリーミキサーにゴムを入れ、加硫促進剤および硫黄を加えてさらに混練し、重荷重および／または建設車両用タイヤ用ゴム組成物を得た。次に得られた該ゴム組成物を所定の金型中で１５０℃、３０分間プレス加硫して２ｍｍ厚の加硫ゴム試験片を得、以下に示す試験法で未加硫のゴム組成物または加硫ゴム試験片の物性を測定した。
Standard example, Examples 1-2 and Comparative Examples 1-4
Preparation of Sample In the formulation (parts by mass) shown in Table 1, the components other than the vulcanization accelerator and sulfur were kneaded for 5 minutes with a 1.7 liter closed Banbury mixer, and then the rubber was discharged outside the mixer and cooled to room temperature. . Subsequently, rubber was put into the Banbury mixer, and a vulcanization accelerator and sulfur were added and further kneaded to obtain a heavy load and / or a rubber composition for construction vehicle tires. Next, the rubber composition thus obtained was press vulcanized at 150 ° C. for 30 minutes in a predetermined mold to obtain a vulcanized rubber test piece having a thickness of 2 mm, and an unvulcanized rubber composition was obtained by the following test method. Or the physical property of the vulcanized rubber test piece was measured.
ムーニー粘度：上記未加硫のゴム組成物を用い、ＪＩＳ Ｋ６３００に従い、１００℃における未加硫ゴムの粘度を測定した。結果は標準例の値を１００として指数表示した。指数が小さいほど粘度が低く、加工性が良好であることを示す。
硬度（２０℃）：ＪＩＳ Ｋ６２５３に準拠して２０℃にて測定した。結果は、標準例の値を１００として指数表示した。指数が大きいほど硬度が高く、耐カット性に優れることを示す。
ｔａｎδ（６０℃）：（株）東洋精機製作所製、粘弾性スペクトロメーターを用い、初期歪１０％、振幅±２％、周波数２０Ｈｚ、温度６０℃の条件で、ｔａｎδ（６０℃）を測定した。結果は、標準例の値を１００として指数表示した。指数が小さいほど低発熱性であることを示す。
耐偏摩耗性：トレッドを上記で得られたゴム組成物からなるものとした１１Ｒ２２．５の試験タイヤをリムに組付け、空気圧７００ｋＰａの条件で車両総重量２０ｔのトラックに装着し、乾燥路面上で２万ｋｍ走行した後、ブロックに発生したヒールアンドトウ摩耗による偏摩耗量（ブロックの段差量）を測定した。結果は、標準例の値を１００として指数表示した。指数が大きいほど耐偏摩耗性が優れている。
結果を表１に併せて示す。
Mooney viscosity: The viscosity of unvulcanized rubber at 100 ° C. was measured according to JIS K6300 using the above-mentioned unvulcanized rubber composition. The results are shown as an index with the value of the standard example being 100. The smaller the index, the lower the viscosity and the better the workability.
Hardness (20 ° C.): Measured at 20 ° C. according to JIS K6253. The results are shown as an index with the value of the standard example being 100. The larger the index, the higher the hardness and the better the cut resistance.
tan δ (60 ° C.): Using a viscoelastic spectrometer manufactured by Toyo Seiki Seisakusho, tan δ (60 ° C.) was measured under the conditions of initial strain 10%, amplitude ± 2%, frequency 20 Hz, and temperature 60 ° C. The results are shown as an index with the value of the standard example being 100. A smaller index indicates a lower exothermic property.
Uneven wear resistance: An 11R22.5 test tire having a tread made of the rubber composition obtained above was assembled to a rim, mounted on a truck with a total vehicle weight of 20 t under a condition of air pressure of 700 kPa, and on a dry road surface. After running for 20,000 km, the amount of uneven wear due to heel and toe wear generated on the block (the step difference in the block) was measured. The results are shown as an index with the value of the standard example being 100. The larger the index, the better the uneven wear resistance.
The results are also shown in Table 1.
＊１：ＮＲ（ＴＳＲ２０）
＊２：ＢＲ（日本ゼオン（株）製ＮＩＰＯＬ ＢＲ １２２０）
＊３：カーボンブラック−１（新日化カーボン（株）製ニテロン＃３００ＩＨ、Ｎ２ＳＡ＝１２０ｍ２／ｇ）
＊４：カーボンブラック−２（キャボットジャパン（株）製ショウブラックＮ５５０、Ｎ２ＳＡ＝４２ｍ２／ｇ）
＊５：酸化亜鉛（正同化学工業（株）製酸化亜鉛３種）
＊６：ステアリン酸（日油（株）製ステアリン酸ＹＲ）
＊７：老化防止剤（FLEXSYS社製SANTOFLEX 6PPD）
＊８：プロセスオイル（出光興産（株）製ダイアナプロセスＮＨ−６０）
＊９：スチレン化フェノール化合物−１（三光（株）製ＳＰ−Ｆ。モノスチレン化フェノール６５モル％以上、ジスチレン化フェノール３２モル％以下、トリスチレン化フェノール１モル％以下）
＊１０：スチレン化フェノール化合物−２（三光（株）製ＳＰ−２４。モノスチレン化フェノール０モル％、ジスチレン化フェノール６０モル％以上、トリスチレン化フェノール４０モル％以下）
＊１１：スチレン化フェノール化合物−３（三光（株）製ＴＳＰ。モノスチレン化フェノール０モル％、ジスチレン化フェノール３０モル％以下、トリスチレン化フェノール６５モル％以上）
＊１２：硫黄（鶴見化学工業（株）製金華印油入微粉硫黄、硫黄の含有量＝９５．２４質量％）
＊１３：加硫促進剤（大内新興化学工業（株）製ノクセラーＮＳ）
* 1: NR (TSR20)
* 2: BR (NIPOL BR 1220 manufactured by Nippon Zeon Co., Ltd.)
* 3: Carbon Black-1 (Niteron Carbon Co., Ltd. Niteron # 300IH, N 2 SA = 120 m 2 / g)
* 4: Carbon black-2 (show black N550 manufactured by Cabot Japan Co., Ltd., N 2 SA = 42 m 2 / g)
* 5: Zinc oxide (3 types of zinc oxide manufactured by Shodo Chemical Industry Co., Ltd.)
* 6: Stearic acid (Stearic acid YR manufactured by NOF Corporation)
* 7: Anti-aging agent (SANSYS FLEX 6PPD manufactured by FLEXSYS)
* 8: Process oil (Diana Process NH-60 manufactured by Idemitsu Kosan Co., Ltd.)
* 9: Styrenated phenol compound-1 (SP-F manufactured by Sanko Co., Ltd. Monostyrenated phenol 65 mol% or more, distyrenated phenol 32 mol% or less, tristyrenated phenol 1 mol% or less)
* 10: Styrenated phenol compound-2 (SP-24 manufactured by Sanko Co., Ltd. Monostyrenated phenol 0 mol%, distyrenated phenol 60 mol% or more, tristyrenated phenol 40 mol% or less)
* 11: Styrenated phenol compound-3 (TSP manufactured by Sanko Co., Ltd. Monostyrenated phenol 0 mol%, distyrenated phenol 30 mol% or less, tristyrenated phenol 65 mol% or more)
* 12: Sulfur (Tsurumi Chemical Co., Ltd. Jinhua Seal Oil Fine Powdered Sulfur, Sulfur content = 95.24% by mass)
* 13: Vulcanization accelerator (Noxeller NS, manufactured by Ouchi Shinsei Chemical Co., Ltd.)
上記の表１から明らかなように、実施例１〜２で調製されたゴム組成物は、特定の組成のジエン系ゴムに対し、特定の特性を有するカーボンブラックおよび特定の構造を有するスチレン化フェノール化合物を特定量で配合したので、従来の代表的な標準例に対し、硬度、発熱性、耐偏摩耗性および加工性がいずれも改善している。
これに対し、比較例１は、モノスチレン化フェノールを主成分とするスチレン化フェノール化合物を使用しているので、発熱性が悪化した。
比較例２は、カーボンブラックの配合量が本発明で規定する下限未満であるので、硬度が低下した。
比較例３は、カーボンブラックの窒素吸着比表面積（Ｎ２ＳＡ）が本発明で規定する範囲外であるので硬度が低下した。
比較例４は、ＮＲの配合量が本発明で規定する下限未満であるので、硬度が低下した。
As is clear from Table 1 above, the rubber compositions prepared in Examples 1 and 2 were a carbon black having specific characteristics and a styrenated phenol having a specific structure with respect to a diene rubber having a specific composition. Since the compound is blended in a specific amount, the hardness, heat generation, uneven wear resistance, and workability are all improved with respect to the conventional typical standard examples.
On the other hand, since the comparative example 1 uses the styrenated phenol compound which has monostyrenated phenol as a main component, exothermic property deteriorated.
In Comparative Example 2, since the blending amount of carbon black was less than the lower limit specified in the present invention, the hardness decreased.
In Comparative Example 3, the hardness decreased because the nitrogen adsorption specific surface area (N 2 SA) of carbon black was outside the range defined in the present invention.
In Comparative Example 4, since the blending amount of NR was less than the lower limit specified in the present invention, the hardness decreased.
Claims (2)
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60128003A (en) * | 1983-12-15 | 1985-07-08 | Yokohama Rubber Co Ltd:The | Pneumatic radial tyre |
| JPS6160738A (en) * | 1984-09-03 | 1986-03-28 | Bridgestone Corp | Rubber composition having excellent abrasion resistance and processability |
| JP2000038477A (en) * | 1998-07-23 | 2000-02-08 | Sumitomo Rubber Ind Ltd | Tire tread rubber composition |
| JP2007084591A (en) * | 2005-09-20 | 2007-04-05 | Nippon Zeon Co Ltd | Rubber composition and rubber crosslinked product |
| JP2009242578A (en) * | 2008-03-31 | 2009-10-22 | Yokohama Rubber Co Ltd:The | Diene-based rubber composition |
| JP2010059325A (en) * | 2008-09-04 | 2010-03-18 | Toyo Tire & Rubber Co Ltd | Rubber composition, method for producing the same, and pneumatic tire |
| JP2011063718A (en) * | 2009-09-17 | 2011-03-31 | Toyo Tire & Rubber Co Ltd | Rubber composition, process for producing the same and pneumatic tire |
-
2015
- 2015-02-26 JP JP2015036169A patent/JP6439497B2/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60128003A (en) * | 1983-12-15 | 1985-07-08 | Yokohama Rubber Co Ltd:The | Pneumatic radial tyre |
| JPS6160738A (en) * | 1984-09-03 | 1986-03-28 | Bridgestone Corp | Rubber composition having excellent abrasion resistance and processability |
| JP2000038477A (en) * | 1998-07-23 | 2000-02-08 | Sumitomo Rubber Ind Ltd | Tire tread rubber composition |
| JP2007084591A (en) * | 2005-09-20 | 2007-04-05 | Nippon Zeon Co Ltd | Rubber composition and rubber crosslinked product |
| JP2009242578A (en) * | 2008-03-31 | 2009-10-22 | Yokohama Rubber Co Ltd:The | Diene-based rubber composition |
| JP2010059325A (en) * | 2008-09-04 | 2010-03-18 | Toyo Tire & Rubber Co Ltd | Rubber composition, method for producing the same, and pneumatic tire |
| JP2011063718A (en) * | 2009-09-17 | 2011-03-31 | Toyo Tire & Rubber Co Ltd | Rubber composition, process for producing the same and pneumatic tire |
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