KR20070033539A - Rubber Compound of The Pneumatic Tire with Improved Durability Properties - Google Patents

Rubber Compound of The Pneumatic Tire with Improved Durability Properties Download PDF

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Publication number
KR20070033539A
KR20070033539A KR1020050087818A KR20050087818A KR20070033539A KR 20070033539 A KR20070033539 A KR 20070033539A KR 1020050087818 A KR1020050087818 A KR 1020050087818A KR 20050087818 A KR20050087818 A KR 20050087818A KR 20070033539 A KR20070033539 A KR 20070033539A
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South Korea
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weight
parts
silica
rubber
rubber composition
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KR1020050087818A
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Korean (ko)
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김태은
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금호타이어 주식회사
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Priority to KR1020050087818A priority Critical patent/KR20070033539A/en
Publication of KR20070033539A publication Critical patent/KR20070033539A/en

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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
    • B60C1/0041—Compositions of the carcass layers
    • 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
    • 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
    • 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
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/17—Amines; Quaternary ammonium compounds
    • C08K5/18—Amines; Quaternary ammonium compounds with aromatically bound amino groups
    • 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
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/315—Compounds containing carbon-to-nitrogen triple bonds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L21/00—Compositions of unspecified rubbers
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08L9/06—Copolymers with styrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

A rubber composition of pneumatic tires is provided to have heat-generation resistance and improve a durability performance even upon driving of high-load tires. The rubber composition of pneumatic tires comprises 40-60 parts by weight of a rubber filler consisting of carbon black and silica, 0.8-2.4 parts by weight of a silica dispersant, and optionally 2-4 parts by weight of N-1,3-dimethylbutyl-N'-phenylquinone diamine based on 100 parts by weight of a rubber composition. The carbon black and silica are added in a ratio of 3:1-3.

Description

내구성능이 우수한 공기입 타이어의 카카스용 고무조성물{Rubber Compound of The Pneumatic Tire with Improved Durability Properties} Rubber compound for carcass of pneumatic tire with excellent durability {Rubber Compound of The Pneumatic Tire with Improved Durability Properties}

본 발명은 공기입 타이어의 카카스용 고무조성물에 관한 것으로, 보다 상세하게는 고하중 타이어의 주행에서도 내구 성능을 유지 및 향상 시킬 수 있도록 설계된 공기입 타이어의 카카스용 고무조성물에 관한 것이다. The present invention relates to a carcass rubber composition of pneumatic tires, and more particularly to a carcass rubber composition of pneumatic tires designed to maintain and improve the durability performance even in the running of high-load tires.

일반적으로 카카스용 고무조성물은 섬유코드와의 접착력, 내굴곡 노화성능 및 인열성능이 향상되도록 설계되는 것이 바람직하다. 이를 위해 기존의 국내특허공개공보 제2004-82612호 개시된 보강용 첨가제 및 국내특허공개공보 제1999-26210호에 개시된 비닐구조 함량이 높은 고무의 적용예가 개시된 바 있다. 하지만 이들은 고하중 조건에서 주행시 발생하는 카카스 턴업부의 세퍼레이션을 개선하기에는 한계가 있다. 본 발명은 가혹한 고하중 주행상에서도 내구 성능의 향상을 기대할 수 있는 면에서 상기 종래기술과 기술적 구성을 달리한다.In general, the rubber composition for carcass is preferably designed to improve adhesion to the fiber cord, bending resistance aging performance and tearing performance. To this end, applications of reinforcing additives disclosed in Korean Patent Laid-Open Publication No. 2004-82612 and rubber having a high vinyl structure content disclosed in Korean Patent Publication No. 1999-26210 have been disclosed. However, they have limitations to improve the separation of the carcass turn-up part that occurs when driving under high load conditions. The present invention differs from the above-described prior art and technical configuration in that it can be expected to improve durability performance even in severe high-load driving.

본 발명은 상기한 바와 같은 종래 기술이 가지는 문제를 해결하기 위해 제안된 것으로, 본 발명의 목적은 고하중 조건에서 주행시 발생하는 카카스 턴업부의 세퍼레이션을 개선할 수 있어 고하중 주행에서도 내구력이 개선되는 카카스 조성물을 제공함에 있다.The present invention has been proposed to solve the problems of the prior art as described above, an object of the present invention can improve the separation of the carcass turn-up portion generated when driving under high load conditions, so durability is improved even under high load driving It is to provide a carcass composition.

상기 목적을 달성하기 위하여 본 발명은 승용차용 카카스 고무조성물에 있어서, 고무 조성물 100중량부에 있어 고무 충전제로서 카본블랙과 실리카, 및 실리카 분산제를 포함하는 것을 특징으로 하는 카카스용 고무조성물을 제공한다.In order to achieve the above object, the present invention provides a carcass rubber composition comprising a carbon black and silica, and a silica dispersant as a rubber filler in a carcass rubber composition for passenger cars. do.

본 발명에 의하면, 바람직하게는 상기 카본블랙과 실리카의 합이 40~60 중량부를 이루며, 카본블랙과 실리카 첨가비율이 3:1~3, 보다 바람직하게는 3:2의 비로 구성됨을 특징으로 하는 카카스용 고무조성물을 제공한다.According to the present invention, preferably, the sum of the carbon black and silica constitutes 40 to 60 parts by weight, and the carbon black and silica addition ratio is 3: 1 to 3, more preferably 3: 2. It provides a rubber composition for carcass.

본 발명에 의하면, 상기 고무조성물에 바람직하게는 N-1,3-다이메틸부틸-N'-페닐퀴논디아민을 2~4 중량부 포함하는 것을 특징으로 하는 카카스용 고무조성물을 제공한다.According to the present invention, the rubber composition preferably provides 2-4 parts by weight of N-1,3-dimethylbutyl-N'-phenylquinonediamine.

이하, 본 발명의 내용을 보다 상세하게 설명하면 다음과 같다.Hereinafter, the content of the present invention in more detail as follows.

본 발명에 따른 카카스 고무조성물은 경트럭 및 승용차에 적용하는 카카스용 고무조성물로서, 고하중상에서 상대적으로 가혹한 내굴곡 노화성능의 개선을 특징으로 한다. The carcass rubber composition according to the present invention is a carcass rubber composition applied to light trucks and passenger cars, and is characterized by an improvement in the aging performance which is relatively severe at high loads.

본 발명에서는 이러한 기술적 과제를 달성하기 위하여, 통상적인 카카스 고 무조성물에 보강제로서 카본블랙과 함께 실리카 및 실리카 분산제를 적용한다. 고무 충진제로서 실리카 및 카본블랙은 충진제의 합이 40~60 중량부를 이루며, 이때 바람직하게는 카본블랙과 실리카 첨가비율이 3:1~3, 보다 바람직하게는 3:2의 비로 구성되도록 하는 것이 물성개선에 좋다. 또한 실리카 분산제는 0.8~2.4중량부를 적용하는 것이 좋다.In the present invention, in order to achieve this technical problem, silica and silica dispersant are applied together with carbon black as a reinforcing agent to a conventional carcass solid composition. As the rubber filler, silica and carbon black have 40 to 60 parts by weight of the filler, and preferably, the carbon black and silica addition ratio is 3: 1 to 3, more preferably 3: 2. Good for improvement In addition, it is preferable to apply 0.8 to 2.4 parts by weight of the silica dispersant.

또한, 고하중의 차체를 지탱하여 일정기간 주행시 카카스부는 일반 하중시보다 사이드부의 굴실 이력이 많아지며, 이는 상대적으로 고무표면과 섬유코드간의 히스테리시스 차이에 의해 피로도가 급격하게 증가하여 카카스 턴업 세퍼레이션의 발생원인이 된다. 따라서, 본 발명은 일반적으로 사용하는 고무조성물에 노화물성을 개선할 수 있는 N-1,3-다이메틸부틸-N'-페닐퀴논디아민(6-QDI)를 적용하는 것을 포함한다. 6-QDI는 바람직하게는 2~4중량부 적용하는 것이 물성개선의 측면에서 권장된다.In addition, the carcass part has a higher hysteresis history between the rubber surface and the fiber cord when driving for a certain period of time, and the carcass part has a higher load history than the normal load. This can cause a migration. Accordingly, the present invention includes the application of N-1,3-dimethylbutyl-N'-phenylquinonediamine (6-QDI) which can improve the sensibility of a rubber composition. It is recommended to apply 2 to 4 parts by weight of 6-QDI in terms of physical property improvement.

본 발명에 있어 원료고무는 천연고무만을 사용하거나, 천연고무와 스타이렌-부타디엔 고무를 혼용하여 사용할 수 있다. 상기에서 언급한 통상적인 카카스 고무조성물은 고무 100중량부에 코드와의 접착력을 강화하기 위해 레소시놀 포름알데히드 수지(RFL)와 헥사메틸멜라민을 각각 0.5~2.5중량부와 0.5~1.5중량부를 사용할 수 있다. 그밖에 카카스용 고무조성물에 포함되는 노화방지제, 가류활성제는 일반적으로 포함함을 원칙으로 한다.In the present invention, the raw material rubber may be used only natural rubber, or a mixture of natural rubber and styrene-butadiene rubber. The conventional carcass rubber composition mentioned above is 0.5 to 2.5 parts by weight and 0.5 to 1.5 parts by weight of resorcinol formaldehyde resin (RFL) and hexamethylmelamine, respectively, in order to enhance adhesion to the cord in 100 parts by weight of rubber. Can be used. In addition, in general, anti-aging agents and vulcanizing agents included in the rubber composition for carcass are generally included.

이하, 본 발명의 내용을 실시예에 의해 보다 상세하게 설명하기로 한다. 다 만 이들 실시예는 본 발명의 내용을 이해하기 위해 제시되는 것일 뿐 본 발명의 권리범위가 이들 실시예에 한정되어지는 것으로 해석되어져서는 아니된다.Hereinafter, the content of the present invention will be described in more detail by examples. However, these examples are only presented to understand the content of the present invention and should not be construed that the scope of the present invention is limited to these examples.

<비교예 1>Comparative Example 1

천연고무 80중량부, 스타이렌-부타디엔 고무 20중량부로 구성된 100중량부의 원료고무에 카본블랙 N660을 50중량부, RFL을 1.5중량부, HMMM을 2.0중량부 및 기타 활성제, 노방제, 가류제를 표 1과 같이 배합하고, 160℃ 온도에서 25분 가류하여 카카스용 고무시편을 제조하였다.100 parts by weight of raw rubber composed of 80 parts by weight of natural rubber, 20 parts by weight of styrene-butadiene rubber, 50 parts by weight of carbon black N660, 1.5 parts by weight of RFL, 2.0 parts by weight of HMMM, and other active agents, preservatives, and vulcanizing agents. The mixture was prepared as shown in Table 1, and was cured at 160 ° C. for 25 minutes to prepare a rubber specimen for carcass.

<실시예 1><Example 1>

카본블랙 30중량부, 실리카 20중량부, 및 실리카 분산제 2.5중량부를 첨가한 것을 제외하고는 상기 비교예에서와 동일한 조건하에 고무시편을 제조하였다.A rubber specimen was prepared under the same conditions as in Comparative Example except that 30 parts by weight of carbon black, 20 parts by weight of silica, and 2.5 parts by weight of silica dispersant were added.

<실시예 2><Example 2>

카본블랙 30중량부, 실리카 20중량부, 실리카 분산제 2.5중량부 및 6-QDI 30중량부를 첨가한 것을 제외하고는 상기 비교예에서와 동일한 조건하에 고무시편을 제조하였다.A rubber specimen was prepared under the same conditions as in Comparative Example except that 30 parts by weight of carbon black, 20 parts by weight of silica, 2.5 parts by weight of silica dispersant, and 30 parts by weight of 6-QDI were added.

<표 1> 성분 배합 (단위: 중량부)<Table 1> Component Composition (Unit: parts by weight)

조성 항목Composition item 비교예 1Comparative Example 1 실시예 1Example 1 실시예 2Example 2 천연고무Natural rubber 8080 8080 8080 스타이렌-부타디엔 고무Styrene-Butadiene Rubber 2020 2020 2020 카본블랙Carbon black 5050 3030 3030 실리카Silica -- 2020 2020 실리카 분산제Silica dispersant -- 2.52.5 2.52.5 6-QDI6-QDI -- -- 3.03.0 RFLRFL 1.51.5 1.51.5 1.51.5 HMMMHMMM 2.02.0 2.02.0 2.02.0 산화아연 Zinc oxide 55 55 55 스테아린산Stearic acid 2.52.5 2.52.5 2.52.5 공정오일Process oil 55 55 55 촉진제accelerant 0.60.6 0.60.6 0.60.6 DPGDPG 0.30.3 0.30.3 0.30.3 유황brimstone 44 44 44 노방제Labor 33 33 33

<표 2> 고무 물성 및 완제품 타이어 제조 내구력 평가<Table 2> Evaluation of Rubber Properties and Finished Tire Manufacturing Durability

실시항목Action Items 비교예Comparative example 실시예1Example 1 실시예2Example 2 비고Remarks 고무시편 제조평가Rubber Specimen Manufacturing Evaluation 경도Hardness 6060 6161 6161 Shore A MethodShore a method 100℃ 무늬점도100 ℃ 4242 4444 4444 Mooney 시험기Mooney tester 인장강도The tensile strength 180180 200200 198198 Instron 시험기Instron tester 발열지수Fever Index 100100 115115 125125 *Blow out* Blow out 접착력/부착률Adhesion / Adhesion 20/100%20/100% 20/100%20/100% 20/100%20/100% **H-Test** H-Test 완제품 제조평가 ***ECE-R54Finished product manufacturing evaluation *** ECE-R54 평균주행시간Average driving time 75시간75 hours 76시간76 hours 76시간76 hours 일반하중General load 평균사고종류Average accident type 비드터짐Bead Burst 비드터짐Bead Burst 비드터짐Bead Burst 조건시험Condition test 평균주행시간Average driving time 62시간62 hours 68시간68 hours 70시간70 hours 일반하중General load 평균사고종류Average accident type 비드터짐Bead Burst 비드터짐Bead Burst 비드터짐Bead Burst 130%하중130% load

* Blow out test: 비에프굿리치 시험기를 사용하여 발열지수를 평가* Blow out test: Evaluate fever index using BF Goodrich tester

**H-Test: ASTM 방법을 적용 175℃ 15분 가류하여 평가(1500D/2P PET CORD)** H-Test: Applied ASTM method, evaluated by vulcanization for 15 minutes at 175 ℃ (1500D / 2P PET CORD)

***ECE-R54: FMVSS 규정을 적용하여 부하 내구력 평가*** ECE-R54: evaluation of load durability by applying FMVSS regulations

상기 완제품 평가시 경트럭에 사용되는 5.00R12 규격을 이용하여 평가하였다.The finished product was evaluated using the 5.00R12 standard used for light trucks.

상기 결과와 같이 실리카 및 경우에 따라 6-QDI를 사용한 카카스용 고무조성물을 사용할 경우 내발열 성능이 향상되어짐을 확인할 수 있으며, 완제품 타이어의 부하 내구력 시험을 통해 고하중 주행시 내구력 성능이 향상되고 있음을 알 수 있다.As shown in the above results, it can be seen that the heat-resistance performance is improved when using a rubber composition for carcass using silica and in some cases, 6-QDI. It can be seen.

Claims (3)

승용차용 카카스 고무조성물에 있어서, 고무 조성물 100중량부에 있어 고무 충전제로서 카본블랙과 실리카, 및 실리카 분산제를 포함하는 것을 특징으로 하는 카카스용 고무조성물.A carcass rubber composition for a car, wherein the carcass rubber composition comprises carbon black, silica, and a silica dispersant as a rubber filler in 100 parts by weight of the rubber composition. 제 1항에 있어서, 카본블랙과 실리카의 합이 40~60 중량부를 이루며, 카본블랙과 실리카 첨가비율이 3:1~3의 비를 특징으로 하는 카카스용 고무조성물.The rubber composition for carcass according to claim 1, wherein the sum of carbon black and silica forms 40 to 60 parts by weight, and the carbon black and silica addition ratio is 3: 1 to 3. 제 1항에 있어서, N-1,3-다이메틸부틸-N'-페닐퀴논디아민을 2~4 중량부 포함하는 것을 특징으로 하는 카카스용 고무조성물.The rubber composition for carcass according to claim 1, comprising 2 to 4 parts by weight of N-1,3-dimethylbutyl-N'-phenylquinonediamine.
KR1020050087818A 2005-09-21 2005-09-21 Rubber Compound of The Pneumatic Tire with Improved Durability Properties KR20070033539A (en)

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