KR100445832B1 - Rubber composition for tire tread - Google Patents
Rubber composition for tire tread Download PDFInfo
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- KR100445832B1 KR100445832B1 KR10-2001-0073704A KR20010073704A KR100445832B1 KR 100445832 B1 KR100445832 B1 KR 100445832B1 KR 20010073704 A KR20010073704 A KR 20010073704A KR 100445832 B1 KR100445832 B1 KR 100445832B1
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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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
- C08K3/34—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
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/43—Compounds containing sulfur bound to nitrogen
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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
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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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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- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
본 발명은 고무 고형분 함량을 기준으로 하여 천연고무 35∼45중량%와 에멀젼 타입의 스티렌-부타디엔 고무 55∼65중량%를 포함하는 원료고무 100중량부, 카본블랙 60∼70중량부, 실리카 5∼10중량부, 보강성 수지로서 개질 레소시놀 포름알데히드 수지(modified resorcinol formaldehyde resin) 2∼3중량부, 촉진제로서 헥사메틸렌 테트라민 1∼2중량부 및 통상의 첨가제를 포함하는 타이어 트레드용 고무 조성물에 관한 것으로서, 이는 천연고무와 합성고무를 적정하게 배합하며, 적정 수준의 고무경도를 높이기 위해 보강성 수지를 사용하고, 수지와의 반응성을 위해 사용된 촉진제간의 적절한 사용으로 경도를 높이면서 내열성도 향상되어 칩-컷 성능에 유리한 결과를 가져온다.The present invention is based on the rubber solid content, 100 parts by weight of raw rubber, including 35 to 45% by weight of natural rubber and 55 to 65% by weight of styrene-butadiene rubber of emulsion type, 60 to 70 parts by weight of carbon black, silica 5 to 10 parts by weight, 2 to 3 parts by weight of modified resorcinol formaldehyde resin as a reinforcing resin, 1 to 2 parts by weight of hexamethylene tetramin as an accelerator and a conventional additive, a rubber composition for tire treads The present invention relates to proper mixing of natural rubber and synthetic rubber, using a reinforcing resin to increase rubber hardness at an appropriate level, and increasing the hardness while increasing hardness by appropriate use of accelerators used for reactivity with the resin. This results in an advantageous result for chip-cut performance.
Description
본 발명은 사용조건이 가혹한 곳에서 사용하기에 적합한 정도로 발열 내구성능이 향상되고 칩-컷 성능이 향상된 타이어 트레드용 고무 조성물에 관한 것이다.The present invention relates to a rubber composition for tire treads having improved heat generation durability and improved chip-cut performance to an extent suitable for use in harsh use conditions.
경량 트럭(light truck)은 통상적으로 사용조건에 따라 3가지로 구분되는데, 그중에서도 사용조건이 가혹한 곳에서 사용하는 타이어는 MT용으로 표시한다. 이같은 MT용 트럭에서 가장 흔하게 발생하는 사고는 벨트부 에지(edge)에서 발생하는 세퍼레이션(separation) 및 주행 중에 노면의 날카로운 돌 및 이물질에 의해서 고무표면이 치핑(고무의 찢김), 커팅(cutting) 및 청킹(chunking) 현상 등을 들 수 있다.Light trucks are generally classified into three types according to conditions of use. Among them, tires used in harsh conditions of use are marked for MT. The most common accidents in these MT trucks include separation at the belt edges and chipping of the rubber surface by sharp stones and debris on the road during driving. And chunking phenomena.
벨트 에지부에서 발생하는 세퍼레이션은 타이어의 내구성능과 관련이 많으며 고무 표면에서 발생하는 칩-컷 현상은 트레드 고무의 물성과 관련이 높다.Separation at the belt edge is related to the durability of the tire, and chip-cut at the rubber surface is related to the properties of the tread rubber.
통상적으로 사용조건이 가혹한 곳에서 사용하는 타이어는 첫 번째로 타이어의 내구성능을 고려하는데, 이로인해 일반적으로 타이어 제조업체에서는 트레드 고무의 조성물을 선택할 때 발열 내구성에 유리한 천연고무를 사용하면서, 보강성 충전제인 카본블랙의 사용량을 일반용도보다 적게 사용하여 발열상승을 억제하려는 시도가 있었다.In general, tires used in the harsh conditions of use first consider the durability of the tire, which is why tire manufacturers generally use natural rubber, which is advantageous for exothermic durability, when selecting a composition of tread rubber. Attempts have been made to suppress the increase in heat generation by using less phosphorus carbon black than general use.
배합내용 측면에서 본다면 일반적으로 사용하는 카본 블랙 이외에 연료사용량을 낮추고, 제동성능에 유리한 실리카 보강 충전제를 사용하여 트레드부의 발열을 낮춤으로써 내구성능을 보완하는 방법도 시도되었다.In terms of formulation content, in addition to carbon black, which is generally used, a method of compensating durability by reducing fuel consumption and reducing heat of tread by using a silica reinforcing filler which is advantageous for braking performance has been attempted.
그러나, 타이어의 발열내구성능을 향상시키고자 발열억제에 가장 유리한 천연고무만을 사용해서는 기타 보강 충전제인 카본블랙, 실리카를 변경하여도 칩-컷 현상을 막기에는 부족하다.However, the use of only natural rubber, which is most advantageous for suppressing heat generation, is insufficient to prevent chip-cut phenomenon even if other reinforcing fillers such as carbon black and silica are modified to improve the heat generation durability of the tire.
한편, 천연고무에 부타디엔 고무, 스티렌-부타디엔 고무 등을 배합하여 사용함으로써 내마모성을 향상시키는 방법도 시도되었으나, 내마모성과 상반되는 내구성능을 모두 보완하지는 못하였다.Meanwhile, a method of improving wear resistance by using butadiene rubber and styrene-butadiene rubber in combination with natural rubber has also been attempted.
이에, 본 발명자는 천연고무에 에멀젼 타입의 스티렌-부타디엔 고무를 혼합사용하고, 여기에 보강성 레진과 촉진제 등을 적절히 배합한 결과, 발열내구성과 내칩컷 성능이 향상됨을 알게되어 본 발명을 완성하게 되었다.Thus, the present inventors use an emulsion-type styrene-butadiene rubber mixed with natural rubber, and as a result of properly blending a reinforcing resin and an accelerator, the present inventors have found that heat generation durability and chip cut performance are improved, thereby completing the present invention. It became.
따라서, 본 발명의 목적은 발열내구성능과 내칩컷성능이 향상된 타이어 트레드용 고무 조성물을 제공하는 데 있다.Accordingly, an object of the present invention is to provide a rubber tread rubber composition having improved heat resistance and chip cut resistance.
상기와 같은 목적을 달성하기 위한 본 발명의 타이어 트레드용 고무 조성물은 고무 고형분 함량을 기준으로 하여 천연고무 35∼45중량%와 에멀젼 타입의 스티렌-부타디엔 고무 55∼65중량%를 포함하는 원료고무 100중량부, 카본블랙 60∼70중량부, 실리카 5∼10중량부, 보강성 수지로서 개질 레소시놀 포름알데히드 수지(modified resorcinol formaldehyde resin) 2∼3중량부, 촉진제로서 헥사메틸렌 테트라민 1∼2중량부 및 통상의 첨가제를 포함하는 것임을 그 특징으로 한다.Rubber composition for tire treads of the present invention for achieving the above object is a raw material rubber 100 containing 35 to 45% by weight of natural rubber and 55 to 65% by weight of styrene-butadiene rubber of the emulsion type based on the rubber solid content Parts by weight, 60 to 70 parts by weight of carbon black, 5 to 10 parts by weight of silica, 2-3 parts by weight of modified resorcinol formaldehyde resin as reinforcing resin, and 1 to 2 hexamethylene tetramine as accelerator It is characterized by including a weight part and the usual additives.
이와같은 본 발명을 더욱 상세하게 설명하면 다음과 같다.The present invention will be described in more detail as follows.
본 발명의 트레드 고무 조성물에 있어서, 원료고무는 천연고무와 유화중합 스티렌-부타디엔 고무로서, 원료고무 중 천연고무는 35∼45중량%로 사용하는 것이 바람직하다. 만일, 천연고무의 함량이 원료고무 중 35중량% 미만이면 증량된 합성고무 증가로 인해 보강성 충전제의 사용량이 증가되어 오히려 발열내구성능에 악영향을 미치게 되며, 45중량% 초과면 커팅 성능에 영향을 주는 합성고무 사용량이 줄게되어 고무의 적정강도를 유지할 수 없다. 에멀젼 타입의 스티렌-부타디엔 고무는 스티렌 함량이 40%, 비닐함량이 18%, 고무 고형분 함량에 대하여 오일이 37.5%가 포함되고, 유리전이온도가 -35∼-40℃인 것이 바람직하며, 그 사용량은 원료고무 중 55∼65중량%이다. 만일, 에멀젼 타입의 스티렌-부타디엔 고무의 함량이 원료고무 중 55중량% 미만이면 천연고무의 함량이 많아지므로 고무의 내커팅 성능 유지에 불리하며, 65중량% 초과면 과도한 발열상승으로 인해 타이어의 내구성능에 악영향을 미치게 된다.In the tread rubber composition of the present invention, the raw material rubber is natural rubber and emulsion-polymerized styrene-butadiene rubber, and the natural rubber of the raw material rubber is preferably used at 35 to 45% by weight. If the content of natural rubber is less than 35% by weight of the raw material rubber, the amount of reinforcing filler is increased due to the increase in the amount of synthetic rubber which is increased, which adversely affects the exothermic durability, and if it exceeds 45% by weight, the cutting performance is affected. As the amount of synthetic rubber used decreases, it cannot maintain the proper strength of rubber. The emulsion type styrene-butadiene rubber contains 40% styrene, 18% vinyl, 37.5% oil with respect to the rubber solids content, and preferably has a glass transition temperature of -35 to -40 ° C. Silver is 55-65 weight% in raw material rubber. If the content of the emulsion-type styrene-butadiene rubber is less than 55% by weight of the raw rubber, the content of natural rubber increases, so it is disadvantageous to maintain the cutting resistance of the rubber, and if it exceeds 65% by weight, the durability of the tire due to excessive heat rise. This will adversely affect performance.
한편, 본 발명에서 보강성 충전제로서 카본블랙과 실리카를 사용하는 바, 카본블랙으로는 요오드 흡착량이 160∼170mg/g, DBP 흡유량이 110∼120㎤/100g인 것이 바람직하며 그 함량은 고무 고형분 함량을 기준으로 원료고무 100중량부에 대하여 60∼70중량부를 사용하는 것이 바람직하다. 본 발명에서는 N110 급인 SAF급 일반 카본블랙과 비교하여 구조(DBP값), 틴트 착색값은 유사하나 카본블랙의 표면적(요오드 흡착량)이 큰 것을 사용하는 바, 그 사용량이 원료고무 100중량부에 대하여 60중량부 미만이면 발열내구 측면에서는 유리하지만 보강측면에서 불리하며 70중량부 초과면 과도한 보강으로 인해 발열 내구성능이 당연히 저하된다. 즉, 타이어의 내부에 축적된 열로 인해 타이어가 조기에 세퍼레이션되기 쉽다.Meanwhile, in the present invention, carbon black and silica are used as reinforcing fillers. As carbon black, iodine adsorption amount is preferably 160 to 170 mg / g and DBP oil absorption is 110 to 120 cm 3/100 g, and the content is rubber solid content. It is preferable to use 60 to 70 parts by weight based on 100 parts by weight of the raw material rubber. In the present invention, the structure (DBP value) and tint coloring value are similar to those of the SAF grade carbon black, which is N110, but the surface area (iodine adsorption amount) of carbon black is used. If it is less than 60 parts by weight, it is advantageous in terms of heat generation durability, but it is disadvantageous in terms of reinforcement. If it exceeds 70 parts by weight, the exothermic durability is naturally lowered due to excessive reinforcement. In other words, the tire is easily separated early due to the heat accumulated inside the tire.
나머지 보강성 충전제인 실리카는 하이드레이티드 실리카(hydrated silica)인 요오드 흡착량 160∼180mg/g, DBP가 230∼240㎤/100g인 것이 바람직하며, 그 사용량은 고무 고형분 함량을 기준으로 원료고무 100중량부에 대하여 5∼10중량부인 것이 바람직하다. 만일, 실리카의 사용량이 원료고무 100중량부에 대해 5중량부 미만이면 첨가 효과가 미미하며, 10중량부를 넘게되면 커팅에 유리한 고무의 강도 향상에는 도움이 되지만 고무와의 결합이 형성되지 않는 일종의 이물질로 강하게 작용되어 고무의 강도 및 발열이 과도하게 증가되는 문제가 있다.The remaining reinforcing filler, silica, is preferably 160 to 180 mg / g of iodine adsorption and 230 to 240 cm 3/100 g of hydrated silica, and the amount of the raw material is 100 based on the rubber solid content. It is preferable that it is 5-10 weight part with respect to a weight part. If the amount of silica used is less than 5 parts by weight based on 100 parts by weight of the raw material rubber, the effect of addition is insignificant. If it exceeds 10 parts by weight, it is helpful to improve the strength of rubber, which is advantageous for cutting, but is a kind of foreign matter that does not form a bond with rubber. It is strongly acted as a problem that the strength and heat generation of the rubber excessively increased.
또한, 촉진제로서 2,2'-디티오비스벤조티아졸 디설파이드와 헥사메틸렌 테트라민을 혼용하는 데, 2,2'-디티오비스벤조티아졸 디설파이드를 고무 고형분 함량을 기준으로 원료고무 100중량부에 대하여 1.1∼1.3중량부로 사용하는 것이 바람직하다. 그 함량이 1.1중량부 미만이면 고무를 가류하는데 필요한 시간이 길어지며 1.3중량부 초과면 가류시간이 빨라져 고무의 경도가 과도하게 증가되어 내구성능에 악영향을 미친다.In addition, 2,2'-dithiobisbenzothiazole disulfide and hexamethylene tetramine are mixed as an accelerator, and 2,2'-dithiobisbenzothiazole disulfide is added to 100 parts by weight of the raw material rubber based on the rubber solid content. It is preferable to use it at 1.1-1.3 weight part. If the content is less than 1.1 parts by weight, the time required to vulcanize the rubber is longer, and if the content is more than 1.3 parts by weight, the vulcanization time is increased, and the hardness of the rubber is excessively increased, adversely affecting the durability performance.
그리고, 헥사메틸렌 테트라민을 고무 고형분 함량을 기준으로 원료고무 100중량부에 대하여 1∼2중량부로 사용하는 데, 1중량부 미만이면 가류시간이 긴 실리카, 보강성 수지 등을 적절히 가류시키는데 부족하며, 2중량부 초과면 고무의 스코치(고무가 미리 가류되는 것) 안정성이 불리해진다.In addition, hexamethylene tetramine is used in an amount of 1 to 2 parts by weight based on 100 parts by weight of the raw material rubber, based on the solid content of rubber. If it is less than 1 part by weight, it is insufficient to adequately cure silica, a reinforcing resin, and the like having a long vulcanization time. If more than 2 parts by weight, the scorch of the rubber (what the rubber is preliminarily vulcanized) has a disadvantage.
한편, 본 발명에서 보강성 수지로서 개질 레소시놀 포름알데히드 수지를 사용하게 되는데, 그 첨가량은 고무 고형분 함량을 기준으로 원료고무 100중량부에 대하여 2∼3중량부인 것이 바람직하다. 만일, 그 첨가량이 2중량부 미만이면 첨가효과가 미미하고, 3주양부 초과면 타이어를 가류하는 데 필요한 시간이 길어지며 고무의 보강성능이 저하된다.On the other hand, modified resorcinol formaldehyde resin is used as the reinforcing resin in the present invention, the addition amount is preferably 2-3 parts by weight based on 100 parts by weight of the raw material rubber based on the rubber solid content. If the added amount is less than 2 parts by weight, the effect of addition is insignificant. If the added amount is more than 3 weeks, the time required for vulcanizing the tire becomes longer and the reinforcing performance of the rubber is lowered.
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∼4Example 1 and Comparative Examples 1-4
다음 표 1에 나타낸 바와 같은 조성 및 배합비로 통상의 방법에 따라 배합하여 고무시편을 얻었다. 다음 표 1 기재에 있어서 함량의 단위는 고무고형분 함량을 기준으로 한 중량부(phr)를 의미한다.Next, the rubber sample was prepared by mixing according to a conventional method with the composition and the mixing ratio as shown in Table 1. In the following Table 1, the unit of content means parts by weight (phr) based on the rubber solid content.
상기에서 얻어진 고무에 대하여 피로응력, 동적손실계수, 내마모성, 컷 저항성, 크랙성장기울기를 측정하여 그 결과를 다음 표 2에 나타내었고, 타이어의 내구성능을 평가하기 위하여 실내 내구평가를 수행하여 그 결과를 다음 표 3에 나타내었다.Fatigue stress, dynamic loss factor, abrasion resistance, cut resistance, crack growth slope were measured for the rubber obtained above, and the results are shown in Table 2 below. Is shown in Table 3 below.
타이어 내구성능은 LT265/75R16 10PR Mud & Snow type(악로용) 타이어 규격으로 제조하여 평가하였다.Tire durability was evaluated by manufacturing the LT265 / 75R16 10PR Mud & Snow type tires.
상기 표 2의 기재에 있어서 고무의 적정 경도 유지는 트레드부 블록의 움직임을 적게 만들어 블록 움직임에 따른 내열성(heat resistance)을 최소화함으로써 타이어 전체의 발열을 낮출 수 있다.Maintaining an appropriate hardness of the rubber in the description of Table 2 can reduce the heat of the entire tire by minimizing the heat resistance according to the block movement by making the movement of the tread block less.
따라서, 실시예 1 고무는 적정 경도를 유지함에 따라 양호해진 내열성으로 인해 표 3에 나타낸 바와 같이 실내 고속내구 시험결과 우수한 결과를 나타냄을 알 수 있다.Therefore, it can be seen that the rubber of Example 1 exhibited excellent results as a result of the high-speed durability test results in the room, as shown in Table 3, due to the heat resistance that was improved by maintaining the appropriate hardness.
고무의 치핑(노면의 이물질에 의해 고무 표면이 미세하게 흠집 또는 떨어져 나가는 현상) 및 커팅(이물질에 의해 고무 표면이 갈라지는 현상)을 평가하는 것은 BFG 칩-컷 시험기와 길로틴 커터(Guillotine cutter)가 있는데, BFG 칩-컷 시험기는 시편을 원주방향으로 회전시키면서 날카로운 나이프로 고무 표면을 일정 시간별로 내리치면서 고무에 커팅 현상을 유발시키는 것이며, 길로틴 커터는 날카로운 송곳이 고무시편의 위에서 밑으로 떨어지면서 고무의 내부에 박히는 깊이로서, 고무의 커팅 성능을 평가하는 시험기이다.Evaluating chipping of rubber (fine scratches or peeling off of the rubber surface by foreign matter on the road surface) and cutting (splitting of the rubber surface by foreign matter) include the BFG chip-cut tester and guillotine cutter. The BFG chip-cut tester rotates the specimen in the circumferential direction and causes the rubber to be cut while lowering the surface of the rubber with a sharp knife for a certain period of time. It is a tester that evaluates the cutting performance of rubber as the depth to be embedded therein.
실시예 1의 고무의 경우, 양 시험조건에서 모두 우수한 결과를 나타내고 있다.In the case of the rubber of Example 1, excellent results were obtained under both test conditions.
실내시험기에서 시험하는 고속주행 내구시험은 고하중, 고속에서 실시하는데, 실시예 1의 고무의 경우 적정하게 유지된 경도로 인해 고무 블록의 움직임이 적어져 내구성능에서 우수한 결과로 나타난다.The high-speed driving endurance test, which is tested in an indoor tester, is carried out at high loads and high speeds, and the rubber of Example 1 exhibits excellent results in durability due to less movement of the rubber block due to a properly maintained hardness.
고무의 경도가 증가하여 내 컷 성능이 향상되었다고 하더라도 고무의 히스테리시스와 내열성간의 적정 균형이 유지되어야만 한다. 즉, 고무의 히스테리시스 손실(고무의 동적손실 계수가 낮을수록 유리)이 낮으면 세퍼레이션 가능성이 낮아져 유리하지만 고무의 경도가 낮아져 내커팅 성능에 불리하며 고무의 움직임이 커져 내구성능에도 불리해진다. 과도한 히스테리시스 손실 증가는 고무의 경도를 높여 내 커팅 성능과 실내 내구성능에 유리하지만 그 한계치가 넘으면 내부 발열상승으로 인해 쉽게 세퍼레이션이 발생됨을 알 수 있다(비교예 3).Even if the hardness of the rubber is increased to improve the cut resistance, a proper balance between hysteresis and heat resistance of the rubber must be maintained. In other words, the lower the hysteresis loss of the rubber (the lower the dynamic loss factor of the glass), the lower the possibility of separation, which is advantageous, but the hardness of the rubber is low, which is disadvantageous for cutting resistance and the rubber's movement. Excessive hysteresis loss increases the hardness of the rubber, which is good for cutting performance and interior durability, but when the limit is exceeded, it can be seen that separation occurs easily due to the internal heating rise (Comparative Example 3).
이러한 성능들은 천연고무와 합성고무를 적정하게 배합하는 것 외에도, 적정수준의 고무경도를 높이기 위해 보강성 수지를 사용하고, 수지와의 반응성을 위해 사용된 촉진제간의 적절한 사용으로 경도를 높이면서 내열성도 향상되어 칩-컷 성능에 유리한 결과를 가져온 것이다.In addition to the proper blending of natural and synthetic rubbers, these performances use reinforcement resins to increase rubber hardness at an appropriate level, and heat resistance while increasing hardness through proper use of accelerators used for reactivity with resins. This is an improvement in chip-cut performance.
이상에서 상세히 설명한 바와 같이, 본 발명에 따라 천연고무와 에멀젼 타입의 스티렌-부타디엔 고무를 원료고무로 사용하고, 여기에 카본블랙과 실리카를 보강성 충전제로 사용하고, 개질 레소시놀 포름알데히드 수지를 보강성 수지로서 첨가하고, 여기에 촉진제를 첨가하여 얻어진 고무 조성물은 발열 내구성능이 향상되면서 칩-컷 성능이 개선되는 효과를 얻을 수 있다.As described in detail above, according to the present invention, natural rubber and emulsion type styrene-butadiene rubber are used as raw material rubber, carbon black and silica are used as reinforcing fillers, and modified resorcinol formaldehyde resin is used. The rubber composition obtained by adding it as a reinforcing resin and adding an accelerator to it can obtain an effect of improving chip-cut performance while improving exothermic durability.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101170415B1 (en) | 2010-11-30 | 2012-08-07 | 한국타이어 주식회사 | Tire tread rubber composition and tire manufactured by using the same |
| KR101314208B1 (en) * | 2010-11-25 | 2013-10-02 | 한국타이어 주식회사 | Tread rubber composition and tire manufactured by using the same |
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| KR100803318B1 (en) * | 2007-02-23 | 2008-02-13 | 금호타이어 주식회사 | Rubber composition for tire comprising chain type carbon black |
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| KR20030008550A (en) * | 2001-07-18 | 2003-01-29 | 금호산업 주식회사 | Tread rubber composition |
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| KR100196624B1 (en) * | 1990-02-21 | 1999-06-15 | 윌리엄 에스. 리 | Rubber compounding resin |
| KR960037318A (en) * | 1995-04-21 | 1996-11-19 | 캐쓸린 엠. 이스터링 | Tires with treads of cap / base construction |
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| KR101314208B1 (en) * | 2010-11-25 | 2013-10-02 | 한국타이어 주식회사 | Tread rubber composition and tire manufactured by using the same |
| KR101170415B1 (en) | 2010-11-30 | 2012-08-07 | 한국타이어 주식회사 | Tire tread rubber composition and tire manufactured by using the same |
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