KR20010095609A - Tire tread rubber composition with low hysteresis property and manufacturing method thereof - Google Patents
Tire tread rubber composition with low hysteresis property and manufacturing method thereof Download PDFInfo
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- KR20010095609A KR20010095609A KR1020000018868A KR20000018868A KR20010095609A KR 20010095609 A KR20010095609 A KR 20010095609A KR 1020000018868 A KR1020000018868 A KR 1020000018868A KR 20000018868 A KR20000018868 A KR 20000018868A KR 20010095609 A KR20010095609 A KR 20010095609A
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- South Korea
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- silica
- rubber
- rubber composition
- silane
- particle diameter
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 35
- 239000005060 rubber Substances 0.000 title claims abstract description 35
- 239000000203 mixture Substances 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 84
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 42
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910000077 silane Inorganic materials 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 239000007822 coupling agent Substances 0.000 claims abstract 2
- 239000002245 particle Substances 0.000 claims description 34
- 239000002994 raw material Substances 0.000 claims description 12
- 239000011164 primary particle Substances 0.000 claims description 4
- 239000000446 fuel Substances 0.000 abstract description 16
- 238000005859 coupling reaction Methods 0.000 description 8
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000013329 compounding Methods 0.000 description 5
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920003052 natural elastomer Polymers 0.000 description 3
- 229920001194 natural rubber Polymers 0.000 description 3
- 239000012744 reinforcing agent Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- ZUBNXRHITOZMOO-UHFFFAOYSA-N zinc;octadecanoic acid;oxygen(2-) Chemical compound [O-2].[Zn+2].CCCCCCCCCCCCCCCCCC(O)=O ZUBNXRHITOZMOO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Landscapes
- 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
Description
본 발명은 마모성능을 유지하면서 또한 저히스테리시스 특성을 가지므로써 저연비 성능이 우수한 타이어용 트레드 고무조성물 및 그 제조방법에 관한 것이다.The present invention relates to a tread rubber composition for a tire having excellent low fuel efficiency by maintaining abrasion performance and having low hysteresis characteristics, and a method of manufacturing the same.
현재까지 타이어의 저연비 성능을 향상시키기 위해 히스테리시스가 적은 천연고무나 보강제로서 카본블랙이나 실리카를 사용하여 타이어를 제조해 왔다. 이와 같이 저연비 성능을 향상시키기 위해 보강제를 적용할 경우 입자경이 큰 것이나 구조가 잘 발달된 것을 사용했는데, 이로 인해 타이어의 저연비 특성은 향상되나 타이어의 마모 특성은 하락되어, 양자는 트레드 오프(trade-off) 관계에 있어 두가지 특성(저연비와 마모) 중 하나는 손해를 보면서 타이어를 제조해왔다.To date, tires have been manufactured using carbon black or silica as natural rubber or reinforcing agent with low hysteresis in order to improve the low fuel efficiency of tires. As such, when the reinforcing agent is applied to improve the low fuel efficiency, one having a large particle size or a well-developed structure is used, which improves the low fuel efficiency of the tire but decreases the wear characteristics of the tire, thereby both tread-off (trade-). One of the two characteristics (low fuel consumption and wear) in the relationship has been manufacturing tires at a loss.
이러한 시스템은 타이어의 성능에서 가장 중요한 두가지 특성인 마모 및 저연비 특성을 동시에 만족시키지 못하는 단점을 갖고 있으며, 주로 원유가격의 영향에 따라 저연비 특성이 좌우되었으며, 환경보전적인 측면에서도 저연비 특성이 강조되어 왔다.This system has the disadvantage of not satisfying the two most important characteristics of tire performance, wear and low fuel consumption at the same time. The low fuel consumption is mainly influenced by the price of crude oil, and low fuel consumption has been emphasized in terms of environmental conservation. .
저연비 특성을 가진 타이어 제조를 위해 선행되어야 할 고무와 보강제 간의 친화력 측정은 매우 어려우며, 통상은 가황전에 바운드 고무의 양으로 측정하고 있다. 또한 실리카를 사용하는 종래의 기술은 원료고무와 실리카의 친화력을 향상시키기 위해 커플링 물질인 실란을 사용하여도 필요한 양 만큼의 부분적인 커플링은 시행되지 못하고 있다.It is very difficult to measure the affinity between the rubber and the reinforcing agent to be preceded for the manufacture of tires with low fuel efficiency, and is usually measured by the amount of bound rubber before vulcanization. In addition, in the conventional technology using silica, even in the case of using silane, which is a coupling material, in order to improve the affinity between the raw material rubber and silica, partial coupling of the required amount is not carried out.
본 발명의 목적은 상기와 같은 문제점을 개선하여 마모성능을 유지하면서 동시에 저연비 성능이 우수한 타이어 트레드용 고무조성물 및 그 제조방법을 제공하는 것이다.SUMMARY OF THE INVENTION An object of the present invention is to provide a rubber composition for a tire tread and a manufacturing method thereof having excellent low fuel consumption while maintaining wear performance by improving the above problems.
도 1은 본 발명의 실시예에 의한 두가지 종류의 실리카가 원료고무와 배합된 상태의 예를 나타낸 도면이다.1 is a view showing an example of a state in which two kinds of silica is blended with the raw material rubber according to an embodiment of the present invention.
본 발명의 타이어 트레드용 고무조성물은 범용의 원료고무에 입자경이 다른 실리카들 및 커플링 물질로서 실란을 포함하며, 상기 실리카들중 입자경이 큰 실리카의 입자경은 1차 입자경 기준 40㎚ 이상이고, 입자경이 작은 실리카의 입자경은 1차 입자경 기준 20㎚ 이하인데, 이 입자경들 간의 비율은 입자경이 큰 실리카와 작은 실리카간에 2.0배 이하인 것을 특징으로 한다.The rubber composition for tire treads of the present invention includes silane as a coupling material and silicas having different particle diameters in general-purpose raw rubber, and the particle diameter of the silica having a larger particle size is 40 nm or more based on the primary particle size, The particle diameter of this small silica is 20 nm or less based on the primary particle diameter, and the ratio between these particle diameters is characterized by being 2.0 times or less between the large silica and the small silica.
본 발명에서는 입자경이 서로 다른 실리카를 사용하고, 원료고무와 실리카간의 친화력을 향상시키기 위해 커플링 물질로서 실란을 사용하므로써 마모 성능을유지시키고 저연비 특성을 향상시킨다.In the present invention, silica having different particle diameters is used, and silane is used as a coupling material to improve the affinity between the raw material rubber and the silica, thereby maintaining wear performance and improving low fuel efficiency.
본 발명의 타이어 트레드용 고무조성물의 제조방법중 배합공정에서는 배합효과를 증진시키고, 원료고무와 실리카 간의 친화력을 향상시키기 위해 실란을 사용하여, 현장에서(in-situ)의 반응를 적용하였다.In the compounding process of the rubber tread composition of the present invention, in-situ reaction was applied using silane to enhance the compounding effect and improve the affinity between the raw material rubber and silica.
본 발명의 고무조성물의 제조방법의 일예는 우선 배합기의 온도를 약 90℃로 유지시킨 다음, 배합기의 로타 속도를 약 50∼80rpm으로 가동시키고, 범용의 원료고무인 스티렌-부다디엔 고무(SBR), 천연고무(NR) 및 부다디엔 고무(BR) 등에서 선택된 1종 이상을 100phr 중량 기준으로 하여 투입한 후 약 30∼60초 사이에 입자경이 큰 실리카를 약 40∼60phr, 실란을 3∼12phr 중량기준으로 배합기에 투입하여 원료고무와 배합한다.One example of the production method of the rubber composition of the present invention is to first maintain the temperature of the blender at about 90 ℃, then operating the rota speed of the blender at about 50 ~ 80rpm, styrene-budadiene rubber (SBR), a general raw material rubber, After at least one selected from natural rubber (NR) and budadiene rubber (BR) is added based on 100 phr by weight, about 40 to 60 phr of silica having a large particle size and 3 to 12 phr of silane are added in about 30 to 60 seconds. Put it into the blender and mix it with the raw material rubber.
상기 배합은 약 140∼160℃ 정도의 온도로 유지한 상태에서 약 2∼3분 정도 계속되며, 이때에 입자경이 큰 실리카의 표면에 실란이 반응하여 표면에너지를 감소시키므로써 원료고무와 친화력이 좋게 된다. 상기 배합후 입자경이 작은 실리카를 약 40∼60phr 정도 투입하여 보강효과를 증진시킨다. 보강효과를 향상시키기 위하여 배합시 최대 토오크가 되게 하며, 배합물의 온도는 160℃ 이상을 넘지 않게 한다.The compounding is continued for about 2 to 3 minutes while maintaining the temperature at about 140 to 160 ° C. At this time, silane reacts to the surface of silica having a large particle size to reduce the surface energy, thereby improving the affinity with the raw material rubber. do. After the mixing, about 40 to 60 phr of silica having a small particle size is added to enhance the reinforcing effect. In order to improve the reinforcing effect, the maximum torque is used in the compounding, and the temperature of the compounding does not exceed 160 ° C.
본 발명에서 사용된 실리카의 종류는 입자경이 작은 것과 큰 것이 서로 잘 분산이 되어야 하며, 그 입자크기 비율은 아래와 같은 식 1로 표기된다.The type of silica used in the present invention should have a small particle diameter and a large one dispersed well, and the particle size ratio is represented by Equation 1 below.
2.0DS< DL식 12.0 D S <D L Equation 1
여기에서 DS는 작은 실리카의 입자경이며, DL는 큰 실리카의 입자경이다. 상기 식으로 표시되는 바와 같이, 본 발명에서는 작은 실리카의 입자경이 큰 실리카의 입자경에 비하여 2.0배 이하가 바람직하다. 그 이유는 입자경이 큰 실리카의 공간에 작은 입자의 실리카가 위치하여 더욱 보강효과를 높이기 위함이다. 또한 입자경이 큰 실리카의 양을 최고 60phr에서 40phr을 적용하므로써 저연비 특징을 보강하고, 마모성능을 향상시키기 위해 입자경이 작은 실리카를 40∼60phr을 사용하여 실리카의 구조적인 특징과 크기 영향을 고려하였다. 이에 대한 메커니즘을 도 1에 나타내었다.Here, D S is the particle diameter of small silica, and D L is the particle diameter of large silica. As represented by the above formula, in the present invention, the particle diameter of small silica is preferably 2.0 times or less than the particle diameter of large silica. The reason is that small particles of silica are located in the space of silica having a large particle diameter to further enhance the reinforcing effect. In addition, by applying 40phr at the maximum 60phr of the large particle diameter, 40 ~ 60phr of silica having small particle size was used to reinforce the low fuel efficiency and to improve the wear performance. The mechanism for this is shown in FIG. 1.
도 1에는 배합이 끝난 컴파운딩 고무에 대한 커플링 반응상태를 나타내었으며, 입자경이 큰 실리카와 원료고무 간에만 커플링이 이루어진다. 이는 현장에서 배합시 커플링 반응이 입자경이 큰 실리카에서만 이루어 지도록 반응조건을 유지시켰기 때문이다. 상기 사용된 실란의 양은 적정 수준의 커플링을 위하여 입자경이 큰 실리카의 무게에 대하여 10중량% 이하로 유지하였다. 여기에 사용되는 실란이 10중량% 이상 사용시 제품의 탄성이 급격히 감소하게 된다.Figure 1 shows the coupling reaction state for the compounded rubber compounded, coupling is made only between the silica and the raw material rubber having a large particle diameter. This is because the reaction conditions were maintained so that the coupling reaction was carried out only in silica having a large particle diameter when blended in the field. The amount of silane used was kept below 10% by weight with respect to the weight of the silica having a large particle size for an appropriate level of coupling. When the silane used herein is used more than 10% by weight, the elasticity of the product is drastically reduced.
상기와 같이 제조되는 본 발명의 고무조성물에 대하여 하기의 실시예로써 구체적으로 설명하였다. 다만, 실시예에 본 발명의 범주가 한정되는 것은 아니다.The rubber composition of the present invention prepared as described above was described in detail by the following examples. However, the scope of the present invention is not limited to the examples.
실시예Example
본 발명에 의하여 제조된 트레드 고무조성물은 실리카 입자경에 따른 영향과 실란의 선택적 반응을 유도시켜 저연비 타이어의 단점인 마모성능을 유지 및 향상시키고, 실리카와 원료고무 간의 친화력을 증진시켜 저연비 성능을 향상시켜 연료절감 및 환경친화에 기여할 수 있다.The tread rubber composition prepared according to the present invention induces the influence of the silica particle diameter and the selective reaction of the silane to maintain and improve the wear performance, which is a disadvantage of the low fuel consumption tire, and to improve the low fuel efficiency by enhancing the affinity between the silica and the raw material rubber. It can contribute to fuel saving and environmental friendliness.
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| KR1020000018868A KR100359658B1 (en) | 2000-04-11 | 2000-04-11 | Tire tread rubber composition with low hysteresis property and manufacturing method thereof |
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| KR1020000018868A KR100359658B1 (en) | 2000-04-11 | 2000-04-11 | Tire tread rubber composition with low hysteresis property and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100371589B1 (en) * | 2000-05-23 | 2003-02-11 | 한국타이어 주식회사 | Tire tread composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100371589B1 (en) * | 2000-05-23 | 2003-02-11 | 한국타이어 주식회사 | Tire tread composition |
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