KR20040000241A - A heat-resistance rubber composition for against dust - Google Patents
A heat-resistance rubber composition for against dust Download PDFInfo
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- KR20040000241A KR20040000241A KR1020020035434A KR20020035434A KR20040000241A KR 20040000241 A KR20040000241 A KR 20040000241A KR 1020020035434 A KR1020020035434 A KR 1020020035434A KR 20020035434 A KR20020035434 A KR 20020035434A KR 20040000241 A KR20040000241 A KR 20040000241A
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- C08L7/00—Compositions of natural rubber
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- 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
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- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/45—Heterocyclic compounds having sulfur in the ring
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Abstract
Description
본 발명은 내열성 방진고무 조성물에 관한 것으로서, 더욱 상세하게는 차량 엔진이나 트렌스미션 마운팅용으로 적합한 내열성 방진고무 조성물에 관한 것이다.The present invention relates to a heat resistant dustproof rubber composition, and more particularly, to a heat resistant dustproof rubber composition suitable for a vehicle engine or transmission mounting.
종래에 차량 엔진이나 트렌스미션 마운팅용으로 사용되어 온 방진고무로는 주로 천연고무를 주성분으로 하여 여기에 MAF(Medium Abrasion Furnace) 카본블랙 및 FEF(Fast Extrusion Furnace)카본블랙, 가공유, 활성화제, 노화방지제 및 가황 촉진제 등을 첨가하여서 이루어 지는 고무 조성물을 사용해 왔다.Dust-proof rubber, which has been used for vehicle engines or transmission mountings, is mainly composed of natural rubber, and contains MAF (Medium Abrasion Furnace) carbon black and FEF (Fast Extrusion Furnace) carbon black, processing oil, activator, and aging. Rubber compositions made by adding an inhibitor, a vulcanization accelerator, and the like have been used.
일반적으로 차량 엔진이나 트렌스미션 마운팅용 방진고무는 엔진 룸 내의 고온 조건 하에서 엔진 및 트랜스미션의 무게를 지탱해야 하기 때문에 기계적 특성, 즉 인장강도나 신율보다는 우수한 내열 내구성과 장기간 동안 초기형태를 유지할 수 있는 크리프( Creep ) 성능이 요구된다.In general, anti-vibration rubber for vehicle engines or transmission mountings must support the weight of the engine and transmission under high temperature conditions in the engine room, so that the creep can maintain its initial shape for longer periods of time than its mechanical properties, ie tensile strength or elongation. (Creep) Performance is required.
그러나 상기와 같은 종래의 방진고무 조성물을 차량 엔진이나 트렌스 미션 마운팅용으로 사용하기 위해서는 내열 내구성이나 크리프량 등의 성능을 개선시킬필요가 있었다.However, in order to use such a conventional anti-vibration rubber composition for vehicle engines or trans mission mounting, it is necessary to improve performances such as heat resistance durability and creep amount.
이에, 본 발명의 발명자는 상기와 같은 문제점을 해결하기 위하여 연구 노력한 결과, 천연고무와 함께 합성 천연고무인 이소프렌 고무를 주성분으로 사용하고, 여기에다 내열성 보강제인 실리카( SiO2 )를 첨가하므로서 종래의 방진 고무에 비해 내열 내구성이나 크리프( Creep )량이 월등히 개선된 새로운 방진고무 조성물을 개발하게 되었다.Thus, the inventors of the present invention, in order to solve the above problems, as a result, using a synthetic rubber natural isoprene rubber as a main component as a main component, by adding a heat-resistant reinforcing silica (SiO2) to the conventional anti-vibration rubber In comparison, the new anti-vibration rubber composition has been significantly improved in terms of heat resistance and creep.
따라서 본 발명은 종래의 방진고무 조성물에 비해 내열 내구성 및 크리프량이 크게 개선되어 있어서 특히 차량 엔진이나 트랜스 미션 마운팅용 으로 적합한 내열성 방진고무 조성물을 제공하는 데 그 목적이 있다.Accordingly, an object of the present invention is to provide a heat-resistant dustproof rubber composition which is particularly suitable for vehicle engines or transmission mountings because heat resistance and creep amount are significantly improved compared to conventional dustproof rubber compositions.
이하, 본 발명을 보다 구체적으로 설명하면 다음과 같다.Hereinafter, the present invention will be described in more detail.
본 발명은 정제된 천연고무 47 ~ 53 중량%와 이소프렌 고무 47 ~ 53 중량%로 이루어진 기재고무 100 중량부에 대하여 FEF( Fast Extrusion Furnace )카본블랙 13 ~ 21 중량부, 실리카 14 ~ 16 중량부를 포함하는 것을 특징으로 하는 내열성 방진고무 조성물이다.The present invention comprises 13 to 21 parts by weight of Fast Extrusion Furnace (FEF) carbon black and 14 to 16 parts by weight of silica based on 100 parts by weight of the base rubber comprising 47 to 53% by weight of purified natural rubber and 47 to 53% by weight of isoprene rubber. It is a heat-resistant dustproof rubber composition characterized in that.
본 발명의 내열성 방진고무 조성물은 정제된 천연고무와 합성 천연고무인 이소프렌 고무를 주성분으로 한다. 정제된 천연고무는 단백질 등 불순물이 제거된 것으로서, 특히 내열성 향상에 도움을 주고, 합성 천연고무인 이소프렌 고무는 천연고무보다 가공성은 약간 떨어지나 내수성 및 내노화성이 우수한 특성을 갖고 있다.The heat-resistant dustproof rubber composition of the present invention is composed mainly of purified natural rubber and isoprene rubber, which is a synthetic natural rubber. Purified natural rubber is free from impurities such as proteins, and particularly helps improve heat resistance. Synthetic natural rubber isoprene rubber is slightly lower in processability than natural rubber, but has excellent water resistance and aging resistance.
천연고무와 이소프렌 고무의 조성 비율은 서로 동일한 함량이 되도록 하되, 천연고무 47 ∼ 53 중량%와 이소프렌 고무 47 ∼ 53 중량%가 되도록 한다. 이때, 천연고무의 함량이 47 중량% 미만이면 고무조성물의 기계적 성질이 떨어지고, 53 중량%를 초과하면, 내노화성이 떨어진다. 또한, 이소프렌 고무의 함량이 47 중량% 미만이면 내노화성이 떨어지고, 53 중량%를 초과하면 기계적 성질이 떨어진다.The composition ratio of natural rubber and isoprene rubber is to be the same content, but 47 to 53% by weight of natural rubber and 47 to 53% by weight of isoprene rubber. At this time, if the content of the natural rubber is less than 47% by weight, the mechanical properties of the rubber composition is lowered, if it exceeds 53% by weight, aging resistance is poor. In addition, when the content of the isoprene rubber is less than 47% by weight, aging resistance is lowered, and when the content of isoprene rubber is more than 53% by weight, mechanical properties are lowered.
내열성 향상을 위한 보강제인 실리카(SiO2)의 함량은 주성분인 기재고무 100 중량부에 대하여 14 ∼ 16 중량부가 되도록 한다. 이때, 실리카의 함량이 14 중량부 미만이면 내열성이 떨어지고, 16 중량부를 초과하면 상온 내구력이 떨어진다. 본 발명에서 실리카는 NIPPON SILICA INDUSTIRAL CO., LTD.의 NIPSIL E-200A를 사용할 수 있다.The content of silica (SiO 2), which is a reinforcing agent for improving heat resistance, may be 14 to 16 parts by weight based on 100 parts by weight of the base rubber as a main component. At this time, if the silica content is less than 14 parts by weight, the heat resistance is lowered, and if it exceeds 16 parts by weight, room temperature durability is lowered. In the present invention, the silica may use NIPSIL E-200A of NIPPON SILICA INDUSTIRAL CO., LTD.
카본블랙의 경우, 종래에는 MAF(Medium Abrasion Furnace) 카본블랙과 FEF( Fast Extrusion Furnace ) 카본블랙을 같이 사용해 왔으나 본 발명에서는 매끄러움이 좋고, 내부발열이 적으며 열전도성이 우수한 FEF 카본블랙 만을 사용한다. FEF 카본블랙의 함량은 고무성분 100 중량부에 대하여 13 ~ 21 중량부가 되도록 한다. 이때, 카본블랙의 함량에 따라 고무 조성물의 경도가 조절되는데, 상기 함량이 기준량 미만이면, 경도가 낮아 정적 특성이 낮아지므로 기계적 특성이 저하되고, 반대로 기준량을 초과하면 고경도가 되어 정적 특성이 너무 높아져 승차감 및 감쇄성이 약해진다.In the case of carbon black, MAF (Medium Abrasion Furnace) carbon black and FEF (Fast Extrusion Furnace) carbon black have been used together, but in the present invention, only FEF carbon black having good smoothness, low internal heat generation and excellent thermal conductivity is used. . The content of FEF carbon black is 13 to 21 parts by weight based on 100 parts by weight of the rubber component. At this time, the hardness of the rubber composition is adjusted according to the content of carbon black. If the content is less than the reference amount, the hardness is low and the static properties are lowered, so that the mechanical properties are lowered. It becomes high, and ride comfort and attenuation become weak.
FEF 카본블랙의 함량에 따른 경도의 변화를 고려하여 본 발명의 방진고무 조성물이 엔진 마운팅용으로 사용될 경우에는 FEF 카본블랙의 함량이 19 ∼ 21 중량부가 되도록 하고, 트렌스 미션 마운팅용으로 사용될 경우에는 13 ∼ 15 중량부가 되도록 하는 것이 좋다.In consideration of the change in hardness according to the content of FEF carbon black, when the dustproof rubber composition of the present invention is used for engine mounting, the content of FEF carbon black is 19 to 21 parts by weight, and when used for trans mission mounting It is good to make it to 15 weight part.
본 발명의 방진고무 조성물은 상기 성분 이외에도 가공유, 산화아연, 활성화제, 노화방지제, 황 및 가황 촉진제 등의 각종 보조 첨가제를 포함한다. 가공유( Process Oil )는 배합할 때 분산을 좋게 하고, 신장률을 높이며, 열 흐름을 좋게 한다. 또한 갈라짐 등을 방지하는 효과가 있어서 고무 조성물의 가공성이 좋아진다. 가용유의 함량은 고무 100 중량부에 대하여 4.0 ∼ 4.2 중량부가 적당한데, 4.0 중량부 미만이면, 가공성이 좋지 않고, 4. 2 중량부를 초과하면 접착성이 약해지는 문제점이 있다. 산화아연( ZnO )은 가황속도를 활성화하기 위해 사용하며, 고무 100중량부에 대하여 5.0 ∼ 5.3 중량부 정도가 적당하다. 5.0 중량부 미만이면, 가황속도 활성화가 약해지고, 5.3 중량부를 초과하면, 가황속도의 활성화가 지나치게 커져서 스코치(Scoch)가 발생되어 고무성질이 약해지는 문제가 있다. 활성화제로는 스테아린산( Stearic acid )을 사용하는데 그 함량은 고무 100 중량부에 대하여 2.0 ∼ 2.2 중량부가 좋다. 2.0 중량부 미만이면, 가황속도 활성화가 약해지고, 2.2 중량부를 초과하이면, 가황속도가 지나치게활성화되어 스코치( Scoch )가 발생되어 고무성질이 약해지는 문제가 있다. 내열 노화방지제는 고무 100 중량부에 대하여 1.0 ∼ 1.2 중량부가 포함 되도록 한다. 1.0 중량부 미만이면 내열성이 약해지고, 1.2 중량부를 초과하면 상온 내구력이 약해진다. 오존방지제는 내열성, 내굴곡성 및 내산화성이 우수한 3C(N-Phenyl-N'-isoprophy-p-phenylenedianine)를 고무 100 중량부에 대하여 1.8 ∼ 2.0 중량부를 사용한다. 이때, 1.8 중량부 미만이면 내오존성이 약해지고, 2.0 중량부를 초과하면 내산화성이 약화된다. 노화방지제는 고무 100 중량부에 대하여 1.8 ∼ 2.0 중량부 를 사용한다. 이때, 1.8 중량부 미만이면 내노화성이 약해지고, 2.0 중량부를 초과하면 가황반응을 방해하는 문제점이 있다In addition to the above components, the anti-vibration rubber composition of the present invention contains various auxiliary additives such as processed oil, zinc oxide, activator, anti-aging agent, sulfur and vulcanization accelerator. Process oils provide good dispersion, high elongation, and good heat flow when formulated. Moreover, it has the effect of preventing a crack etc., and the workability of a rubber composition improves. The content of the soluble oil is 4.0 to 4.2 parts by weight with respect to 100 parts by weight of rubber, if less than 4.0 parts by weight, the workability is not good, if more than 4. 2 parts by weight there is a problem that the adhesion is weak. Zinc oxide (ZnO) is used to activate the vulcanization rate, about 5.0 to 5.3 parts by weight relative to 100 parts by weight of rubber. If it is less than 5.0 parts by weight, the vulcanization rate activation becomes weak, and if it exceeds 5.3 parts by weight, activation of the vulcanization rate becomes excessively large, so that a scorch is generated and the rubber properties become weak. Stearic acid is used as an activator, and the content thereof is preferably 2.0 to 2.2 parts by weight based on 100 parts by weight of rubber. If it is less than 2.0 parts by weight, the vulcanization rate activation is weakened. If it is more than 2.2 parts by weight, the vulcanization rate is excessively activated to cause scorch, resulting in a weak rubber property. Heat resistant antioxidants should be included 1.0 to 1.2 parts by weight based on 100 parts by weight of rubber. If it is less than 1.0 weight part, heat resistance will weaken, and if it exceeds 1.2 weight part, room temperature durability will weaken. The ozone inhibitor uses 1.8 to 2.0 parts by weight of 3C (N-Phenyl-N'-isoprophy-p-phenylenedianine) having excellent heat resistance, flex resistance, and oxidation resistance. At this time, when the amount is less than 1.8 parts by weight, the ozone resistance is weakened, and when it exceeds 2.0 parts by weight, the oxidation resistance is weakened. Antioxidant uses 1.8-2.0 weight part with respect to 100 weight part of rubber. At this time, if it is less than 1.8 parts by weight aging resistance is weakened, if it exceeds 2.0 parts by weight there is a problem that hinders the vulcanization reaction
본 발명에서는 고무성분의 가교 형태를 기존의 CV( Conventional Vulcanization )시스템에서 SEMI-EV( Efficient Vulcanization ) 시스템으로 변경하였다. 일반적으로 천연고무의 가황 시스템은 폴리설파이드( Polysulfide )가교가 이루어지는 고황-저가황 촉진제 가황계( Conventional curing system )이다. 그러나 이러한 종래의 가황 시스템은 역 가황( Reversion )이 쉽게 일어날 뿐만 아니라, 내노화성도 약화되는 문제가 있다. 따라서 본 발명에서는 역가황을 적게하고 내노화성을 강화하는 방법으로 디설파이드( Disulfide )가교가 생기는 Semi-EV( Efficient Vulcanization ) 가황시스템(curing system)을 사용하여 황의 양을 줄임으로서 내열성을 향상시켰다.In the present invention, the crosslinked form of the rubber component was changed from the conventional CV (Conventional Vulcanization) system to SEMI-EV (Efficient Vulcanization) system. In general, the vulcanization system of natural rubber is a high sulfur-low vulcanization accelerator vulcanization system (Polysulfide) crosslinking. However, such a conventional vulcanization system has a problem that not only reversion easily occurs, but also aging resistance is weakened. Therefore, in the present invention, the heat resistance is improved by reducing the amount of sulfur by using a Semi-EV (Efficient Vulcanization) vulcanizing system (Disulfide) cross-linking as a method to reduce the reverse vulcanization and enhance the aging resistance.
본 발명에서 황의 함량은 고무 100 중량부에 대하여 1.7 ∼ 1.8 중량부가 좋으며, 1.8 중량부를 초과하면, 내열내구력이 저하되고, 1.7 중량부 미만이면, 상온내구력이 현저히 저하된다. 가황촉진제로는 고무 100 중량부에 대하여 티아졸계의 2-머캅토벤조티아졸(MBT, 2-Mercaptobenzothiazole) 0.2 ∼ 0.3 중량부, 디벤조티아질 디설파이드(MBTS, Dibenzothiazyl Disulfide) 1.0 ∼ 1.3 중량부를 사용한다. 이때, 상기 함량이 기준 이하이면, 안정성이 떨어지며, 기준 이상이면, 가황이 빨라져서 스코치가 발생되어 고무성질이 불량하게 된다.In the present invention, the sulfur content is 1.7 to 1.8 parts by weight with respect to 100 parts by weight of rubber, and if it exceeds 1.8 parts by weight, the heat resistance is lowered, if less than 1.7 parts by weight, the room temperature durability is significantly reduced. As a vulcanization accelerator, 0.2 to 0.3 parts by weight of thiazole 2-mercaptobenzothiazole (MBT) and 1.0 to 1.3 parts by weight of dibenzothiazyl disulfide (MBTS) based on 100 parts by weight of rubber are used. do. At this time, if the content is less than the reference, the stability is lowered, if it is more than the standard, the vulcanization is faster and the scorch is generated, the rubber properties are poor.
이하, 본 발명에 대한 실시예 및 비교예를 들어보면 다음과 같다.Hereinafter, examples and comparative examples of the present invention are as follows.
실시예 1 ~ 2Examples 1 and 2
다음 표 1 과 같은 성분 및 조성비율로 이루어진 방진고무 조성물을 종래의 방법으로 제조하였다. 또한, 실시예 1의 고무 조성물을 사용하여 엔진 마운팅용 부재를 제조하고, 실시예 2의 고무 조성물을 사용하여 트렌스미션 마운팅용 부재를 제조하였다.Next, the anti-vibration rubber composition consisting of components and composition ratios as in Table 1 was prepared by a conventional method. In addition, a member for engine mounting was manufactured using the rubber composition of Example 1, and a member for transmission mounting was manufactured using the rubber composition of Example 2.
비교예 1 ~ 2Comparative Examples 1 and 2
다음 표 2 와 같은 성분 및 조성비율로 이루어진 방진고무 조성물을 종래의 방법으로 제조하였다. 또한, 비교예 1의 고무 조성물을 사용하여 엔진 마운팅용 부재를 제조하고, 비교예 2의 고무 조성물을 사용하여 트렌스미션 마운팅용 부재를 제조 하였다.Next, a dustproof rubber composition consisting of components and composition ratios as shown in Table 2 was prepared by a conventional method. In addition, a member for engine mounting was manufactured using the rubber composition of Comparative Example 1, and a member for transmission mounting was manufactured using the rubber composition of Comparative Example 2.
상기 실시예 및 비교예에 따라 제조된 차량 엔진 및 트렌스미션 마운팅용 부재에 대하여 각각 다음과 같이 물성을 평가하고, 그 결과를 다음 표 3 및 4에 나타내었다.Physical properties of the vehicle engine and the transmission mounting member manufactured according to the above Examples and Comparative Examples were respectively evaluated as follows, and the results are shown in Tables 3 and 4 below.
상기 표3의 결과에 따르면 실시예의 경우, 비교예에 비하여 내열성의 척도인 노화 후 인장강도 및 신율 변화율은 10 ~ 20%, 압축영구 줄음율은 10 ~ 40% 향상된 결과를 나타내었다.According to the results of Table 3, in the case of Examples, the tensile strength and elongation change after aging, which is a measure of heat resistance, was 10 to 20%, and the compressive permanent reduction was 10 to 40%.
상기 표4의 결과에 따르면, 실시예의 경우 비교예에 비하여 내열 내구성 및 크리프량이 크게 개선되어 있음을 알 수 있다.According to the results of Table 4, in the case of the embodiment it can be seen that the heat resistance and creep amount is significantly improved compared to the comparative example.
본 발명에 따른 방진고무 조성물은 종래의 조성물에 비해 내열 내구성 및 크리프량이 크게 개선되어 있어서, 특히 차량 엔진이나 트랜스 미션 마운팅용 방진고무로 매우 적합하다.The anti-vibration rubber composition according to the present invention is significantly improved in heat resistance durability and creep amount compared to the conventional composition, and is particularly suitable as an anti-vibration rubber for a vehicle engine or a transmission mounting.
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| KR1020020035434A KR20040000241A (en) | 2002-06-24 | 2002-06-24 | A heat-resistance rubber composition for against dust |
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| KR1020020035434A KR20040000241A (en) | 2002-06-24 | 2002-06-24 | A heat-resistance rubber composition for against dust |
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Cited By (5)
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| KR20040033423A (en) * | 2002-10-14 | 2004-04-28 | 현대자동차주식회사 | Dustproof Resin Composition having superior endurance and heat-resistance |
| KR100854538B1 (en) | 2007-08-31 | 2008-08-26 | 평화오일씰공업주식회사 | Rubber composition for sealing of shock absorber |
| KR20190056601A (en) | 2017-11-17 | 2019-05-27 | 현대자동차주식회사 | Rubber composition having high stiffness for absorbing vibration of engine |
| CN115785673A (en) * | 2022-12-01 | 2023-03-14 | 浙江创城高分子材料有限公司 | Natural rubber composition and rubber product for dust cover |
| KR20230123084A (en) | 2022-02-15 | 2023-08-23 | 현대자동차주식회사 | Rubber composition for motor mount with improved fatigue resistance and rubber for motor mount comprising the same |
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| KR940014571A (en) * | 1992-12-31 | 1994-07-18 | 전성원 | Rubber composition for automobile dustproof |
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| KR940014571A (en) * | 1992-12-31 | 1994-07-18 | 전성원 | Rubber composition for automobile dustproof |
| JPH0741603A (en) * | 1993-07-30 | 1995-02-10 | Sumitomo Rubber Ind Ltd | High-damping rubber composition blended with silica |
| JPH0770369A (en) * | 1993-08-09 | 1995-03-14 | Goodyear Tire & Rubber Co:The | Tire with silica-reinforced tread |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20040033423A (en) * | 2002-10-14 | 2004-04-28 | 현대자동차주식회사 | Dustproof Resin Composition having superior endurance and heat-resistance |
| KR100854538B1 (en) | 2007-08-31 | 2008-08-26 | 평화오일씰공업주식회사 | Rubber composition for sealing of shock absorber |
| KR20190056601A (en) | 2017-11-17 | 2019-05-27 | 현대자동차주식회사 | Rubber composition having high stiffness for absorbing vibration of engine |
| KR20230123084A (en) | 2022-02-15 | 2023-08-23 | 현대자동차주식회사 | Rubber composition for motor mount with improved fatigue resistance and rubber for motor mount comprising the same |
| CN115785673A (en) * | 2022-12-01 | 2023-03-14 | 浙江创城高分子材料有限公司 | Natural rubber composition and rubber product for dust cover |
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