KR100395889B1 - Tire Tread Rubber Composition for passenger car - Google Patents

Tire Tread Rubber Composition for passenger car Download PDF

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KR100395889B1
KR100395889B1 KR10-2000-0072041A KR20000072041A KR100395889B1 KR 100395889 B1 KR100395889 B1 KR 100395889B1 KR 20000072041 A KR20000072041 A KR 20000072041A KR 100395889 B1 KR100395889 B1 KR 100395889B1
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rubber
phr
carbon black
tread rubber
rubber composition
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KR10-2000-0072041A
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Korean (ko)
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KR20020042233A (en
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장경준
최윤희
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금호산업주식회사
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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
    • 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
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • 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

Abstract

본 발명은 승용차용 타이어 트레드 고무조성물에 관한 것으로서 보다 상세하게는 종래 카본블랙에 비해 구조가 발달하고, 입자경이 크고, 표면활성도가 높은 카본블랙을 보강제로 사용하여 마모특성 및 회전저항을 개선시킨 타이어 트레드 고무조성물에 관한 것이다.The present invention relates to a tire tread rubber composition for a passenger car, and more particularly, a tire having improved structure, a large particle size, and high surface activity as a reinforcing agent, compared to conventional carbon black, to improve wear characteristics and rolling resistance. It relates to a tread rubber composition.

본 발명은 구조가 발달하고, 입자경이 크고, 표면활성도가 높은 카본블랙을 보강제로 사용함으로써 트레드 고무의 내마모성 및 회전저항 특성을 향상시키는 것을 목적으로 한다.An object of the present invention is to improve the wear resistance and rotational resistance characteristics of the tread rubber by using carbon black having a structure, large particle size, and high surface activity as a reinforcing agent.

본 발명의 승용차용 타이어 트레드 고무조성물은 공지의 승용차용 타이어 트레드 고무조성물에 있어서, 원료고무 100 phr에 대하여 카본블랙 40∼60 phr 포함하는 것을 특징으로 하는데 원료고무는 천연고무 또는 천연고무 10∼30 phr와 부타디엔 고무, 스티렌 부타디엔 고무와 같은 합성고무 70∼90 phr이 혼합된 혼합고무를 사용하며, 카본블랙은 요오드 흡착가 80∼90g/kg, DBP 흡유량 140∼150ml/100g, 질소흡착 비표면적 80∼90m2/g, 착색도 90∼110%, 표면활성도(N2SA-STSA) 값이 5 이하인 것을 사용한다.The tire tread rubber composition for passenger cars of the present invention is a tire tread rubber composition for passenger cars, which is characterized in that it contains 40 to 60 phr of carbon black with respect to 100 phr of raw material rubber, but the raw material rubber is natural rubber or natural rubber 10 to 30. Mixed rubber containing 70 ~ 90 phr of synthetic rubber such as phr, butadiene rubber and styrene butadiene rubber is used.Carbon black has 80 ~ 90g / kg of iodine adsorption, 140 ~ 150ml / 100g, nitrogen adsorption specific surface area 80 ～ 90 m 2 / g, coloring degree 90-110%, surface activity (N 2 SA-STSA) value of 5 or less is used.

Description

승용차용 타이어 트레드 고무조성물{Tire Tread Rubber Composition for passenger car}Tire Tread Rubber Composition for passenger car

본 발명은 승용차용 타이어 트레드 고무조성물에 관한 것으로서 보다 상세하게는 종래 카본블랙에 비해 구조가 발달하고, 입자경이 크고, 표면활성도가 높은 카본블랙을 보강제로 사용하여 마모특성 및 회전저항을 개선시킨 승용차용 타이어 트레드 고무조성물에 관한 것이다.The present invention relates to a tire tread rubber composition for passenger cars, and more specifically, a structure having improved structure, carbon particle having a high particle size and high surface activity as a reinforcing agent, compared to the conventional carbon black, and improving the wear characteristics and rolling resistance. It relates to a tire tread rubber composition.

승용차용 타이어에서 요구되는 주요 성능으로는 마모성능과 연비성능을 나타내주는 회전저항 특성이 있다.The main performance required for a tire for a passenger car is a rolling resistance characteristic that shows wear performance and fuel efficiency.

타이어의 마모현상은 타이어와 노면 사이에서 발생하는 마찰력에 의해 지면과 접지 되는 타이어 트레드 고무의 표면이 닳게 되는 현상으로 이러한 마모현상은 주행시 커브를 돌 때의 횡력, 구동 및 제동시의 종력 등 여러 가지 요인에 의해 발생되고 있으며, 타이어의 마모는 타이어의 수명, 제동성에 큰 영향을 미치게 되므로 안전주행과 타이어의 비용 절감면에서 내마모성이 우수하여야 한다.Tire wear is a phenomenon in which the surface of the tire tread rubber which is grounded to the ground due to the friction between the tire and the road surface is worn out. This wear phenomenon has various effects such as the lateral force when turning a curve while driving and the final force when driving and braking. It is caused by factors, and wear of tires has a great effect on tire life and braking performance. Therefore, wear resistance should be excellent in terms of safety driving and cost reduction of tires.

회전저항 특성은 타이어와 노면과의 접촉에 따른 에너지의 손실을 줄임으로써 승용차의 운행에 따른 연료비용을 줄여줄 수 있는 특성이다.The rolling resistance characteristic is a characteristic that can reduce the fuel cost of driving a passenger car by reducing energy loss due to contact between the tire and the road surface.

승용차용 타이어 트레드 고무의 내마모성을 개선시키기 위한 방법으로는 고무조성물의 조성비를 조절하여 원료고무의 유리전이 온도를 낮추는 방법, 모듈러스를 증가시키기 위한 방편으로 카본블랙의 첨가량을 증가하는 방법, 입자경이 작은 카본블랙을 적용하는 방법, 공정조제 및 오일의 함량을 줄이는 방법 등이 주로 사용되어 왔다. 또한 회전저항 특성을 향상시키기 위한 방법으로 카본블랙을 사용하는 경우 카본블랙의 첨가량의 감소, 입자경이 크고 구조가 덜 발달한 카본블랙의 사용 등의 방법이 있다.As a method for improving the wear resistance of tire tread rubber for passenger cars, a method of reducing the glass transition temperature of the raw material rubber by adjusting the composition ratio of the rubber composition, a method of increasing the addition amount of carbon black as a means to increase the modulus, and a small particle size Methods of applying carbon black, process aids and reducing the amount of oil have been mainly used. In addition, when the carbon black is used as a method for improving the rotational resistance characteristics, there are methods such as a reduction in the amount of carbon black added, the use of carbon black having a large particle size and a less developed structure.

그러나 승용차용 타이어의 경우 내마모 성능의 향상 및 회전저항 특성의 향상을 동시에 만족시켜야 할 필요가 있으며 이를 위한 카본블랙의 적용은 내마모 및 회전저항 특성의 향상과 서로 대칭되는 특성을 가진 카본블랙을 사용할 수 없는 한계가 있다.However, in the case of tires for passenger cars, it is necessary to satisfy both the improvement of the wear resistance and the improvement of the rolling resistance. The application of carbon black for this purpose is the improvement of the wear resistance and the rolling resistance of the tire and the symmetry of the carbon black. There is a limitation that cannot be used.

본 발명은 공지의 승용차용 트레드 고무조성물에 있어서, 구조가 발달하고, 입자경이 크고, 표면활성도가 높은 카본블랙을 보강제로 사용함으로써 트레드 고무의 내마모성 및 회전저항 특성을 향상시키는 것을 목적으로 한다.In the known tread rubber composition for passenger cars, an object of the present invention is to improve carbon abrasion resistance and rolling resistance of tread rubber by using carbon black having a structure, a large particle diameter, and high surface activity as a reinforcing agent.

본 발명의 승용차용 타이어 트레드 고무조성물은 공지의 타이어 트레드 고무조성물에 있어서, 원료고무 100 phr에 대하여 카본블랙 40∼60 phr 포함하는 것을 특징으로 한다.The tire tread rubber composition for passenger cars of the present invention is a known tire tread rubber composition, characterized in that it contains 40 to 60 phr of carbon black with respect to 100 phr of the raw material rubber.

상기에서 원료고무는 천연고무 또는 천연고무 10∼30 phr와 부타디엔 고무, 스티렌 부타디엔 고무와 같은 합성고무 70∼90 phr이 혼합된 혼합고무를 사용하며, 카본블랙은 요오드 흡착가 80∼90g/kg, DBP 흡유량 140∼150ml/100g, 질소흡착 비표면적 80∼90m2/g, 착색도 90∼110%, 표면활성도(N2SA-STSA) 값이 5 이하인 것을 사용한다.The raw material rubber is a natural rubber or mixed rubber mixed with 10 to 30 phr of natural rubber and 70 to 90 phr of synthetic rubber such as butadiene rubber and styrene butadiene rubber, and carbon black has 80 to 90 g / kg of iodine adsorption and DBP oil absorption was used as the 140~150ml / 100g, the nitrogen adsorption specific surface area 80~90m 2 / g, coloration 90-110%, the surface activity (N 2 SA-STSA) value of 5 or less.

한편, 카본블랙의 특성을 나타내는 척도로 카본블랙의 입자경 크기는 요오드 합착가로 표현되는데 요오드 흡착가가 높을수록 입자경은 적게 나타나는 것을 의미하고, 카본블랙의 구조 발달 정도는 DBP 흡유량의 정도로 나타내는데 DBP 흡유량이 클수록 구조가 발달한 구조이다. 또한 카본블랙의 표면활성도의 정도는 N2SA-STSA 수치로 표현되는데 수치가 낮을수록 표현활성도가 높은 것을 의미한다.On the other hand, the particle size of carbon black is expressed as the iodine-adhesion value as a measure of the properties of carbon black. The higher the iodine adsorption value, the smaller the particle size. The structure is developed. In addition, the degree of surface activity of the carbon black is expressed by the N 2 SA-STSA value, which means that the lower the value, the higher the expression activity.

이하 본 발명을 다음의 비교예, 실시예 및 시험예에 의하여 설명하고자 한다. 그러나 이들이 본 발명의 기술적 범위를 한정하는 것은 아니다.Hereinafter, the present invention will be described by the following comparative examples, examples and test examples. However, these do not limit the technical scope of the present invention.

<비교예>Comparative Example

천연고무 20 phr 및 스티렌 부타디엔 고무 80 phr로 구성된 원료고무 100 phr에 대하여 타이어 트레드 고무조성물에 통상적으로 사용하는 착해제 0.12 phr, 아연화 5.0 phr, 스테아린 산 2 phr, 노화방지제 3 phr, 왁스 1 phr, 상용화제 3phr, 공정오일 2 phr, 촉진제 0.65 phr, 가류제 2.00 phr, 지연제 0.2 phr 및 카본블랙 50 phr을 첨가하여 160℃에서 30분간 가류하여 트레드 고무시편을 제조하였다.For 100 phr of raw rubber consisting of 20 phr of natural rubber and 80 phr of styrene butadiene rubber, 0.12 phr of a commonly used tire tread rubber composition, 5.0 phr galvanized, 2 phr of stearic acid, 3 phr of antioxidant, 1 phr of wax, A tread rubber specimen was prepared by vulcanization at 160 ° C. for 30 minutes by adding 3 phr of compatibilizer, 2 phr of process oil, 0.65 phr of accelerator, 2.00 phr of vulcanizing agent, 0.2 phr of retardant, and 50 phr of carbon black.

상기에서 카본블랙은 종래 트레드 고무조성물에 보강제로 사용하는 것으로서 요오드 흡착가 90g/kg, 질소흡착 비표면적 값 100m2/g, DBP 흡유량 114ml/100g, 착색도 145%, 표면활성도(N2SA-STSA) 12인 것을 사용하였다.The carbon black is used as a reinforcing agent in the conventional tread rubber composition, iodine adsorption 90g / kg, nitrogen adsorption specific surface area value 100m 2 / g, DBP oil absorption 114ml / 100g, coloring degree 145%, surface activity (N 2 SA-STSA) 12 was used.

한편 상기 트레드 고무조성물을 아래의 표 1에 정리하여 나타내었다.Meanwhile, the tread rubber composition is shown in Table 1 below.

<실시예 1><Example 1>

천연고무 20 phr 및 스티렌 부타디엔 고무 80 phr로 구성된 원료고무 100 phr에 대하여 타이어 트레드 고무조성물에 통상적으로 사용하는 착해제 0.12 phr, 아연화 5.0 phr, 스테아린 산 2 phr, 노화방지제 3 phr, 왁스 1 phr, 상용화제 3 phr, 공정오일 2 phr, 촉진제 0.65 phr, 가류제 2.00 phr, 지연제 0.2 phr 및 카본블랙 50 phr을 첨가하여 160℃에서 30분간 가류하여 트레드 고무시편을 제조하였다.For 100 phr of raw rubber consisting of 20 phr of natural rubber and 80 phr of styrene butadiene rubber, 0.12 phr of a commonly used tire tread rubber composition, 5.0 phr galvanized, 2 phr of stearic acid, 3 phr of antioxidant, 1 phr of wax, A tread rubber specimen was prepared by vulcanization at 160 ° C. for 30 minutes by adding 3 phr of compatibilizer, 2 phr of process oil, 0.65 phr of accelerator, 2.00 phr of vulcanizing agent, 0.2 phr of retardant, and 50 phr of carbon black.

상기에서 본 발명에 사용한 카본블랙은 요오드 흡착가 83g/kg, 질소흡착 비표면적 값 81m2/g, DBP 흡유량 146ml/100g, 착색도 100%, 표면활성도(N2SA-STSA) 4인 것을 사용하였다.In the carbon black used in the present invention, iodine adsorption was used at 83g / kg, nitrogen adsorption specific surface area value of 81m 2 / g, DBP oil absorption 146ml / 100g, 100% coloration, surface activity (N 2 SA-STSA) 4.

한편 상기 트레드 고무조성물을 아래의 표 1에 정리하여 나타내었다.Meanwhile, the tread rubber composition is shown in Table 1 below.

<실시예 2><Example 2>

실시예 1에서 사용한 카본블랙을 47 phr 적용하는 것을 제외하고는 같은 조성물 및 방법에 의하여 고무시편을 제조하였다.A rubber specimen was prepared by the same composition and method except that 47 phr of the carbon black used in Example 1 was applied.

표 1. 비교예 및 실시예의 고무조성물(단위: phr)Table 1. Rubber compositions of comparative examples and examples (unit: phr)

항 목Item 비교예Comparative example 실시예 1Example 1 실시예 2Example 2 천연고무Natural rubber 2020 2020 2020 스티렌 부타디엔 고무Styrene Butadiene Rubber 8080 8080 8080 착해제Releasing 0.120.12 0.120.12 0.120.12 아연화Zincification 5.05.0 5.05.0 5.05.0 스테아린 산Stearic acid 22 22 22 노화방지제Anti-aging 33 33 33 왁스Wax 1One 1One 1One 상용화제Compatibilizer 33 33 33 공정오일Process oil 22 22 22 카본블랙Carbon black 5050 5050 4747 촉진제accelerant 0.650.65 0.650.65 0.650.65 가류제Vulcanizing agent 2.002.00 2.002.00 2.002.00 지연제Retardant 0.20.2 0.20.2 0.20.2

<시험예><Test Example>

상기 비교예 및 실시예의 시편을 ASTM 관련규정에 의해 공정성(100℃ 점도, 스코치 타임(t5), 가류시간(t90)), 인장물성(경도, 300% 모듈러스, 인장강도, 신율), 발열(온도차), 피코마모량 및 동적특성(Tg, Tan δ0℃, Tan δ60℃) 등의 물성을 측정하여 그 결과를 아래의 표 2에 정리하여 나타내었다.The specimens of Comparative Examples and Examples were prepared according to ASTM-related regulations (100 ° C viscosity, scorch time (t5), vulcanization time (t90)), tensile properties (hardness, 300% modulus, tensile strength, elongation), and heat generation (temperature difference). ), Pico-abrasion amount and dynamic properties (Tg, Tan δ0 ℃, Tan δ60 ℃) and the physical properties were measured and the results are summarized in Table 2 below.

표 2. 비교예 및 실시예 시편의 물성측정 결과Table 2. Results of Measurement of Physical Properties of Comparative Examples and Examples

항 목Item 비교예Comparative example 실시예 1Example 1 실시예 2Example 2 공정성Fairness 100℃ 점도100 ℃ viscosity 107107 126126 115115 스코치 타임(t5)Scorch time (t5) 19.619.6 19.319.3 19.419.4 가류시간(t90)Rush time (t90) 7.37.3 7.07.0 7.17.1 인장물성Tensile Properties 경도Hardness 7070 7171 7070 300% 모듈러스300% modulus 148148 171171 165165 인장강도The tensile strength 184184 192192 190190 신율Elongation 359359 337337 345345 발열(온도차)Fever (temperature difference) 21.621.6 20.220.2 19.519.5 피코 마모량Pico wear 1.3721.372 1.3551.355 1.3601.360 동적특성Dynamic characteristics TgTg -17.09-17.09 -16.89-16.89 -16.90-16.90 Tan δ(0℃)Tan δ (0 ℃) 0.3550.355 0.3620.362 0.3650.365 Tan δ(60℃)Tan δ (60 ° C) 0.0960.096 0.0840.084 0.0800.080

상기 표 2의 결과에서처럼 본 발명의 트레드 고무조성물은 미가류특성 및 기본물성인 인장강도, 300% 모듈러스는 종래의 트레드 고무조성물인 비교예의 시편과 동등 수준을 보이고 있으나 발열특성 및 피코 마모 특성이 개선되었으며 Tan δ60℃ 값이 낮아져 회전저항 특성이 개선됨을 알 수 있다.As shown in the results of Table 2, the tread rubber composition of the present invention has an unvulcanized property and a basic property tensile strength, and 300% modulus shows the same level as the specimen of the comparative example of a conventional tread rubber composition, but the heat generation property and pico wear characteristics are improved. It can be seen that the rolling resistance is improved by lowering the Tan δ60 ℃ value.

Claims (3)

가류제의 함량이 촉진제 함량보돠 높은 컨벤셔널 가류시스템을 적용하는 공지의 승용차용 타이어 트레드 고무조성물에 있어서,In a known passenger car tire tread rubber composition to which the conventional vulcanization system having a higher vulcanizing agent than the accelerator content is applied, 원료고무 100 phr에 대하여 요오드 흡착가 80∼90g/kg, DBP 흡유량 140∼150ml/100g, 질소흡착 비표면적 80∼90m2/g, 착색도 90∼110%, N2SA-STSA 값이 5 이하인 카본블랙 40∼60 phr 포함하는 것을 특징으로 하는 승용차용 타이어 트레드 고무조성물.Carbon black with iodine adsorption 80-90g / kg, DBP oil absorption 140-150ml / 100g, nitrogen adsorption specific surface area 80-90m 2 / g, coloring degree 90-110%, N 2 SA-STSA value less than or equal to 100 phr of raw rubber A tire tread rubber composition comprising 40 to 60 phr. 제 1항에 있어서, 원료고무는 천연고무 또는 천연고무 10∼30 phr와 부타디엔 고무, 스티렌 부타디엔 고무와 같은 합성고무 70∼90 phr이 혼합된 혼합고무인 것을 특징으로 하는 승용차용 타이어 트레드 고무조성물.The tire tread rubber composition according to claim 1, wherein the raw material rubber is a natural rubber or a mixed rubber containing 10 to 30 phr of natural rubber and 70 to 90 phr of synthetic rubber such as butadiene rubber and styrene butadiene rubber. 삭제delete
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03122170A (en) * 1989-10-05 1991-05-24 Tokai Carbon Co Ltd Carbon black for tire tread rubber
KR970042730A (en) * 1995-12-29 1997-07-26 홍건희 Captread rubber composition for large tires
KR19990017005A (en) * 1997-08-20 1999-03-15 신형인 Rubber composition for tire tread with improved wear resistance
KR19990079685A (en) * 1998-04-08 1999-11-05 신형인 Tire tread rubber composition for truck and bus with improved wear resistance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03122170A (en) * 1989-10-05 1991-05-24 Tokai Carbon Co Ltd Carbon black for tire tread rubber
KR970042730A (en) * 1995-12-29 1997-07-26 홍건희 Captread rubber composition for large tires
KR19990017005A (en) * 1997-08-20 1999-03-15 신형인 Rubber composition for tire tread with improved wear resistance
KR19990079685A (en) * 1998-04-08 1999-11-05 신형인 Tire tread rubber composition for truck and bus with improved wear resistance

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