KR20010106738A - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
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- KR20010106738A KR20010106738A KR1020000027677A KR20000027677A KR20010106738A KR 20010106738 A KR20010106738 A KR 20010106738A KR 1020000027677 A KR1020000027677 A KR 1020000027677A KR 20000027677 A KR20000027677 A KR 20000027677A KR 20010106738 A KR20010106738 A KR 20010106738A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
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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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- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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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
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Tires In General (AREA)
Abstract
본 발명은 대형 래디얼 공기압 타이어에 관한 것으로서, 캡트레드는 원료고무 100중량부와 요오드 흡착가 130∼140mg/g이고, DBP 흡착이 125∼135cc/100g이며, 틴트스트렝스가 130∼140이고, 톨루엔 착색투과도 40%이상인 카본블랙 50∼60중량부 및 배합제로 이루어진 고무로 제조되고, 서브트레드는 원료고무 100중량부에 카본블랙 30∼45중량부, 침강 실리카 5∼15중량부, 실리카 커플링제 및 배합제로 이루어진 고무 조성물로 제조된 것으로, 이는 서브트레드 부위에서 주행 중 발생되는 열을 대폭줄임으로써 타이어의 내구성능을 향상시키고 캡트레드에 비표면적이 크고 입자구조가 발달한 카본블랙을 다량 적용함으로써 내마모성능이 우수한 타이어를 제공한다.The present invention relates to a large radial pneumatic tire, wherein the cap tread has 100 parts by weight of raw material rubber and iodine adsorption at 130 to 140 mg / g, DBP adsorption at 125 to 135 cc / 100 g, tin strength at 130 to 140, and toluene coloring permeability. 50 to 60 parts by weight of carbon black and at least 40% by weight of a rubber compounding agent, and the subtread is composed of 30 to 45 parts by weight of carbon black, 5 to 15 parts by weight of precipitated silica, silica coupling agent and compounding agent. It is made of a rubber composition, which greatly reduces the heat generated during driving in the subtread area, thereby improving tire durability and applying a large amount of carbon black having a large specific surface area and advanced particle structure to the captread. Provide tires.
Description
본 발명은 대형 래디알 공기압 타이어에 관한 것으로서, 더욱 상세하게는 캡트레드 조성물의 내마모성을 향상시키고, 서브트레드 조성물의 주행 중 발생하는 발열을 줄여 사용 수명을 연장시킬 수 있는 타이어에 관한 것이다.The present invention relates to a large radial pneumatic tire, and more particularly, to a tire capable of improving wear resistance of a cap tread composition and reducing heat generated during running of the sub tread composition to extend its service life.
일반적으로 대형 타이어에 있어서, 캡트레드의 경우는 장거리 고속 주행시 타이어 내부에서 발생되는 열로 인해서 야기되는 타이어의 폭발 및 분리현상을 방지하기 위하여 고무 조성물 자체의 저발열성과, 사용 수명을 높이기 위한 내마모성이 요구된다.In general, in the case of large tires, the cap tread requires low heat generation of the rubber composition itself and abrasion resistance to increase service life in order to prevent the explosion and separation of the tire caused by the heat generated inside the tire during long distance high-speed driving. do.
일반적으로 캡트레드 고무의 발열을 낮추는 방법으로는, 충진제로 사용되는 카본블랙의 비표면적과 구조의 발달을 작게하는 방법과; 충전되는 카본블랙의 양을 적게 하는 방법이 널리 사용되고 있다. 그러나, 이 두 방법 모두 캡트레드 조성물의 내마모성이 저하되어 타이어의 전체 수명을 줄이는 결과를 가져왔다.In general, a method for lowering the heat generation of the cap tread rubber, a method for reducing the specific surface area and the development of the structure of the carbon black used as a filler; The method of reducing the amount of carbon black charged is widely used. However, both of these methods lowered the wear resistance of the captread composition, resulting in a reduction in the overall life of the tire.
한편, 일반적으로 대형 타이어 서브트레드 고무의 경우, 장거리 고속주행시 타이어 내부에서 발생되는 열을 줄이기 위해서는 카본블랙 양을 줄이는 방법이 널리 사용되고 있다. 그러나, 이 경우 타이어 사용 말기에 노면과 서브트레드가 닿을 경우 마모가 빨라서 타이어 수명을 저하시키는 결과를 가져온다. 결과적으로, 카본블랙의 감소량에는 한계가 있어 충분히 발열을 감소시킬 수 없다.On the other hand, in the case of large tire subtread rubber, a method of reducing the amount of carbon black is widely used to reduce heat generated in the tire during long-distance high-speed driving. However, in this case, when the road surface and the sub-tread hits the end of the use of the tire, the wear is faster and the tire life is reduced. As a result, there is a limit to the amount of reduction of carbon black, and heat generation cannot be sufficiently reduced.
본 발명은 대형 래디알 공기압 타이어에 있어서 캡트레드와 닿아있는 서브트레드 부위에 있어서 주행 중 발생되는 열을 대폭 줄임으로써 타이어의 내구성능을 향상시키고, 캡트레드에 비표면적이 크고 입자 구조가 발달한 카본블랙을 다량 응용함으로써 내마모성능이 우수한 타이어를 제공하는 데 그 목적이 있다.The present invention improves the durability of the tire by significantly reducing the heat generated during driving in the subtread portion in contact with the cap tread in a large radial pneumatic tire, and has a large specific surface area in the cap tread and a carbon having a fine grain structure. The purpose is to provide a tire with excellent wear resistance by applying a large amount of black.
이와같은 목적을 달성하기 위한 본 발명의 타이어는 캡트레드는 원료고무 100중량부와 요오드 흡착가 130∼140mg/g이고, DBP 흡착이 125∼135cc/100g이며, 틴트스트렝스가 130∼140이고, 톨루엔 착색투과도 40%이상인 카본블랙 50∼60중량부 및 배합제로 이루어진 고무로 제조되고, 서브트레드는 원료고무 100중량부에 카본블랙 30∼45중량부, 침강 실리카 5∼15중량부, 실리카 커플링제 및 배합제로 이루어진 고무 조성물로 제조된 것임을 그 특징으로 한다.The tire of the present invention for achieving the above object is the cap tread is 100 parts by weight of the raw material rubber and iodine adsorption 130-140mg / g, DBP adsorption 125-135cc / 100g, tin strength 130-140, toluene coloring 50 to 60 parts by weight of carbon black having a permeability of 40% or more, and a rubber made of a compounding agent, and the subtread is 30 to 45 parts by weight of carbon black, 5 to 15 parts by weight of precipitated silica, silica coupling agent and compounding to 100 parts by weight of raw material rubber. It is characterized in that it is made of a rubber composition consisting of.
이와같은 본 발명을 더욱 상세하게 설명하면 다음과 같다.The present invention will be described in more detail as follows.
본 발명 타이어에 있어서 캡트레드는 원료고무 100중량부, 카본블랙 50∼60중량부, 및 배합제로 이루어진 고무 조성물로 제조된 것이다.In the tire of the present invention, the cap tread is made of a rubber composition composed of 100 parts by weight of raw material rubber, 50 to 60 parts by weight of carbon black, and a compounding agent.
이때, 카본블랙으로는 요오드 흡착가 130∼140mg/g이고, DBP 흡착이 125∼135cc/100g이며, 틴트스트렝스가 130∼140이고, 톨루엔 착색투과도 40%이상인 것을 사용하는 것이 바람직한 바, 만일 이의 첨가량잉 원료고무 100중량부에 대하여 50중량부 미만이면 만족한만한 수준의 내마모성을 얻기 어렵고, 60중량부 초과면 점도가 높아져서 가공성이 떨어지고 발열이 너무 높아질 수 있으므로 바람직하지 못하다.At this time, as carbon black, it is preferable to use iodine adsorption of 130-140 mg / g, DBP adsorption of 125-135cc / 100g, tintstrength of 130-140, and toluene coloring permeability of 40% or more. If it is less than 50 parts by weight based on 100 parts by weight of the raw material rubber, it is difficult to obtain a satisfactory level of wear resistance, and if it exceeds 60 parts by weight, it is not preferable because the viscosity may be increased, resulting in poor workability and too high heat generation.
이와같이 비표면적이 크고 입자 구조가 발달된 카본블랙을 다량 사용하는 경우 내마모성능이 우수한 고무 조성물을 얻을 수 있다.Thus, when using a large amount of carbon black having a large specific surface area and advanced particle structure, a rubber composition having excellent abrasion resistance can be obtained.
한편, 본 발명 타이어의 서브트레드는 원료고무 100중량부, 카본블랙 30∼45중량부, 침강 실리카 5∼15중량부, 실리카 커플링제 및 배합제로 이루어진 고무 조성물로 제조된 것이다.On the other hand, the sub tread of the tire of the present invention is made of a rubber composition composed of 100 parts by weight of raw material rubber, 30 to 45 parts by weight of carbon black, 5 to 15 parts by weight of precipitated silica, a silica coupling agent and a compounding agent.
여기서, 사용되는 카본블랙은 pH 6∼10이고, 요오드 흡착가 115∼135mg/g이며, DBP 흡착가 100∼120cc/100g이고, 톨루엔 착색투과도 40% 이상인 것이 바람직하며, 그 함량이 서브트레드 고무 중 30중량부 미만이면 사용말기 마모속도가 빨라지고, 45중량부 초과면 내구가 나빠지는 문제가 발생될 수 있다.Here, the carbon black used is pH 6-10, iodine adsorption 115-135mg / g, DBP adsorption 100-120cc / 100g, toluene coloring permeability is preferably 40% or more, the content is 30 weight in the subtread rubber If less than a portion, the end-use wear rate is faster, more than 45 parts by weight may cause a problem of poor durability.
그리고, 침강 실리카는 BET 비표면적 100∼360㎡/g이고, DBP 흡수가 200∼400cc/100g인 것을 사용하는 것이 바람직한 바, 그 첨가량이 원료고무 100중량부에 대하여 5중량부 미만이면 발열저하 효과가 미미하고, 15중량부 초과면 모듈러스 수준이 너무 높아지므로 카본블랙 량을 줄여야 하므로 사용말기 마모속도가 빨라지는 문제가 발생될 우려가 있다.Precipitated silica has a BET specific surface area of 100 to 360 m 2 / g and a DBP absorption of 200 to 400 cc / 100 g is preferably used. If the added amount is less than 5 parts by weight based on 100 parts by weight of the raw material rubber, the exothermic effect is reduced. Insignificantly, if the amount exceeds 15 parts by weight, the modulus level is too high, so the amount of carbon black must be reduced, resulting in a problem that the end-of-use wear speed is increased.
한편, 본 발명 타이어의 서브트레드에 있어서 타이어의 주행시 발생되는 발열을 감소시키기 위하여 실리카 표면과 작용할 수 있는 실리카 커플링제를 첨가하는 것이 바람직하다. 실리카 커플링제는 특별히 한정되는 것은 아니나, 구체적으로는 TESPT 또는 TESPD 등이 바람직하다.On the other hand, in the subtread of the tire of the present invention, it is preferable to add a silica coupling agent that can act on the silica surface in order to reduce the heat generated when the tire runs. Although a silica coupling agent is not specifically limited, Specifically, TESPT, TESPD, etc. are preferable.
본 발명 타이어에 있어서, 캡트레드와 서브트레드에 사용되는 원료고무는 통상의 타이어 트레드에서 사용되는 것이면 되는 바, 일예로 디엔계 천연고무, 용액중합 또는 유화중합 스티렌-부타디엔 고무 등을 들 수 있다.In the tire of the present invention, the raw material rubber used for the cap tread and the sub tread may be one used in a general tire tread. Examples thereof include diene-based natural rubber, solution polymerization or emulsion polymerization styrene-butadiene rubber.
또한, 배합제 또한 통상의 타이어 트레드에서 적용되는 촉진제나 노화방지제 등이면 된다.In addition, the compounding agent may be any accelerator or anti-aging agent applied in a conventional tire tread.
이하, 본 발명을 실시예에 의거 상세히 설명하면 다음과 같은 바, 본 발명이 실시예에 의해 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited by the Examples.
실시예 1 및 비교예 1∼2Example 1 and Comparative Examples 1-2
실시예 1의 타이어는 다음과 같은 고무 조성을 갖는 서브트레드와 캡트레드로 이루어진 것이다.The tire of Example 1 is composed of a subtread and a captread having the following rubber composition.
(1)캡트레드 고무 조성(1) captread rubber compositions
디엔계 천연고무 100중량부, 요오드 흡착가 130∼140mg/g이고, DBP 흡착이 125∼135cc/100g이며, 틴트스트렝스가 130∼140이고, 톨루엔 착색투과도 40%이상인 카본블랙 55중량부, 촉진제로서 N-tert-부틸-2-벤조디아질 설펜아미드 1.4중량부, 가류제로서 황 1.5중량부, 스테아린산 2중량부, 산화아연 3중량부, 노화방지제로서N-1,3-디메틸부틸-N-페닐 파라핀 페닐렌디아민 2중량부, 폴리-2,2,4-트리메틸-1,2-디하이드로 퀴놀린 1중량부, 왁시 하이드로카본 1중량부로 이루어진 고무 조성100 parts by weight of diene-based natural rubber, 130 to 140 mg / g of iodine adsorption, 125 to 135 cc / 100 g of DBP adsorption, 130 to 140 tint strength, 55 parts by weight of carbon black having a toluene coloring permeability of 40% or more, N as an accelerator 1.4 parts by weight of tert-butyl-2-benzodiazyl sulfenamide, 1.5 parts by weight of sulfur as a vulcanizing agent, 2 parts by weight of stearic acid, 3 parts by weight of zinc oxide, and N-1,3-dimethylbutyl-N-phenyl as an antioxidant Rubber composition consisting of 2 parts by weight of paraffin phenylenediamine, 1 part by weight of poly-2,2,4-trimethyl-1,2-dihydroquinoline, and 1 part by weight of waxy hydrocarbon
(2)서브트레드 고무 조성(2) Subtread rubber composition
디엔계 천연고무 100중량부, pH 6∼10이고, 요오드 흡착가 115∼135mg/g이며, DBP 흡착가 100∼120cc/100g이고, 톨루엔 착색투과도 40% 이상인 카본블랙 40중량부, BET 비표면적 100∼360㎡/g이고, DBP 흡수가 200∼400cc/100g인 침강 실리카 10중량부, 실리카 커플링제(TESPT) 2중량부, N-tert-부틸-2-벤조디아질 설펜아미드 1.2중량부, 황 2.5중량부, 스테아린산 2중량부, 산화아연 3중량부, 왁시 하이드로카본 1중량부, 스테아린산 1.5중량부, 산화아연 3중량부로 이루어진 고무 조성100 parts by weight of diene-based natural rubber, pH 6-10, iodine adsorption 115-135 mg / g, DBP adsorption 100-120cc / 100g, toluene coloring permeability 40% by weight of carbon black, BET specific surface area 100-360 10 parts by weight of precipitated silica having a DBP absorption of 200 to 400 cc / 100 g, 2 parts by weight of silica coupling agent (TESPT), 1.2 parts by weight of N-tert-butyl-2-benzodiazyl sulfenamide, and 2.5 parts by weight of m 2 / g Parts, 2 parts by weight of stearic acid, 3 parts by weight of zinc oxide, 1 part by weight of waxy hydrocarbon, 1.5 parts by weight of stearic acid, 3 parts by weight of zinc oxide
상기 (1)과 (2)의 고무 조성으로 타이어를 제조하고, 이 타이어와 비교예의 타이어를 시험링 상에 취부시키고, 타이어 측면상에 지정된 최대하중 등급에 상응하는 공기압으로 팽창시키고, 상온에서 81km/hr의 속도로 100% 하중하에서 10시간 동안 주행하였을 때, 타이어 숄더 내부의 온도를 측정한 결과와 카고 트럭을 이용하여 약 2만 km의 주행시험을 실시한 후의 타이어 예상 주행거리를 다음 표 1에 기재하였다.A tire is manufactured from the rubber composition of (1) and (2) above, the tire and the tire of the comparative example are mounted on a test ring, inflated with air pressure corresponding to the maximum load rating specified on the tire side, and 81 km at room temperature. Table 1 shows the result of measuring the temperature inside the tire shoulder when driving at 100% load for 10 hours at a speed of / hr, and the estimated distance of the tire after running about 20,000 km using a cargo truck. Described.
다음 표 1에 있어서, 비교예 1은 일반적인 캡트레드와 서브트레드를 사용한 타이어이며, 비교예 2는 본 발명 실시예의 캡트레드와 일반적인 서브트레드를 적용한 타이어이다.In Table 1 below, Comparative Example 1 is a tire using a general cap tread and a subtread, and Comparative Example 2 is a tire to which a cap tread and a general subtread of the present invention are applied.
구체적으로 비교예 1의 캡트레드의 고무 조성과 비교예 1과 2에서의 서브트레드의 고무 조성은 다음과 같다.Specifically, the rubber composition of the cap tread of Comparative Example 1 and the rubber composition of the subtreads of Comparative Examples 1 and 2 are as follows.
(1)비교예 1의 캡트레드 고무 조성(1) Cap tread rubber composition of Comparative Example 1
디엔계 천연고무 100중량부, 요오드 흡착가 120mg/g이고, DBP 흡착이 115cc/100g이며, 틴트스트렝스가 115이고, 톨루엔 착색투과도 40%이상인 카본블랙 55중량부, 촉진제로서 N-tert-부틸-2-벤조디아질 설펜아미드 1.4중량부, 가류제로서 황 1.5중량부, 스테아린산 2중량부, 산화아연 3중량부, 노화방지제로서 N-1,3-디메틸부틸-N-페닐 파라핀 페닐렌디아민 2중량부, 폴리-2,2,4-트리메틸-1,2-디하이드로 퀴놀린 1중량부, 왁시 하이드로카본 1중량부로 이루어진 고무 조성100 parts by weight of diene-based natural rubber, 120 mg / g of iodine adsorption, 115 cc / 100 g of DBP adsorption, 115 of tint strength, 55 parts by weight of carbon black having a toluene coloring permeability of 40% or more, N-tert-butyl-2 as an accelerator 1.4 parts by weight of benzodiazyl sulfenamide, 1.5 parts by weight of sulfur as a vulcanizing agent, 2 parts by weight of stearic acid, 3 parts by weight of zinc oxide, 2 parts of N-1,3-dimethylbutyl-N-phenyl paraffin phenylenediamine as an antioxidant Part, rubber composition consisting of 1 part by weight of poly-2,2,4-trimethyl-1,2-dihydroquinoline, and 1 part by weight of waxy hydrocarbon
(2)비교예 1과 비교예 2의 서브트레드 고무 조성(2) Subtread rubber composition of Comparative Example 1 and Comparative Example 2
디엔계 천연고무 100중량부, pH 6∼10이고, 요오드 흡착가 120mg/g이고, DBP 흡착이 115cc/100g이며, 틴트스트렝스가 115이고, 톨루엔 착색투과도 40%이상인 카본블랙 43중량부, N-tert-부틸-2-벤조디아질 설펜아미드 1.2중량부, 황 2.5중량부, 스테아린산 2중량부, 산화아연 3중량부, 왁시 하이드로카본 1중량부, 스테아린산 1.5중량부, 산화아연 3중량부로 이루어진 고무조성100 parts by weight of diene natural rubber, pH 6-10, iodine adsorption 120mg / g, DBP adsorption 115cc / 100g, tintstrength 115, 43% by weight of carbon black with 40% or more toluene permeability, N-tert Rubber composition consisting of 1.2 parts by weight of butyl-2-benzodiazyl sulfenamide, 2.5 parts by weight of sulfur, 2 parts by weight of stearic acid, 3 parts by weight of zinc oxide, 1 part by weight of waxy hydrocarbon, 1.5 parts by weight of stearic acid, and 3 parts by weight of zinc oxide.
상기 표 1의 결과로부터, 캡트레드 고무와 서브트레드 고무를 통상의 것을 사용하여 제조된 타이어의 경우는 내마모성이 떨어짐을 알 수 있고, 서브트레드 고무를 통상의 것을 사용하여 제조된 것은 내마모성은 본 발명의 경우와 동일 수준이나 발열온도가 상승되어 내구성이 떨어짐을 알 수 있다.From the results of Table 1, it can be seen that the wear resistance of a tire manufactured by using a cap tread rubber and a sub tread rubber in general is inferior, and the wear resistance of the sub tread rubber is manufactured using a conventional one. It can be seen that the same level as in the case, but the heat generation temperature is increased and durability is lowered.
이상에서 상세히 설명한 바와 같이, 본 발명에 따라 캡트레드 고무 조성에 비표면적이 크고 입자구조가 발달된 카본블랙을 다량 첨가하고, 서브트레드 부위에 카본블랙과 실리카, 실리카 커플링제를 포함하는 고무를 적용한 타이어의 경우, 주행중 서브트레드 부위에 발생되는 열을 대폭줄일 수 있어 내구성능을 향상시킬 수 있고, 내마모 성능을 향상시킬 수 있다.As described in detail above, according to the present invention, a large amount of carbon black having a large specific surface area and advanced particle structure is added to the cap tread rubber composition, and a rubber including carbon black, silica, and a silica coupling agent is applied to the subtread. In the case of a tire, heat generated in a subtread portion during driving can be greatly reduced, thereby improving durability and improving wear resistance.
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| KR100665480B1 (en) * | 2004-11-22 | 2007-01-09 | 한국타이어 주식회사 | Manufacturing method for tread rubber of truck and bus tires |
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| KR100665480B1 (en) * | 2004-11-22 | 2007-01-09 | 한국타이어 주식회사 | Manufacturing method for tread rubber of truck and bus tires |
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