KR100368636B1 - Rubber composition for inhibiting corrosion of tire steel cord and tire using the same - Google Patents
Rubber composition for inhibiting corrosion of tire steel cord and tire using the same Download PDFInfo
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- KR100368636B1 KR100368636B1 KR10-2000-0059351A KR20000059351A KR100368636B1 KR 100368636 B1 KR100368636 B1 KR 100368636B1 KR 20000059351 A KR20000059351 A KR 20000059351A KR 100368636 B1 KR100368636 B1 KR 100368636B1
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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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/1835—Rubber strips or cushions at the belt edges
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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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- 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
- B60C2001/0075—Compositions of belt cushioning layers
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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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/1835—Rubber strips or cushions at the belt edges
- B60C2009/1864—Rubber strips or cushions at the belt edges wrapped around the edges of the belt
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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)
- Ropes Or Cables (AREA)
Abstract
본 발명은 고무-강선 코드의 복합체 재단물의 부식의 시발이 되는 코드지의 끝부분에 모듈러스가 높고, 전기 저항이 큰 고무조성물로 제조된 압연물을 피복하여 응력 집중 방지 및 부식속도를 크게 늦출 수 있는 고무조성물 및 이를 이용한 타이어에 관한 것이다.The present invention is to cover the rolling material made of a rubber composition with a high modulus and a high electrical resistance at the end of the cord paper which is the start of the corrosion of the composite cutting of the rubber-wire cord can prevent the stress concentration and significantly slow down the corrosion rate It relates to a rubber composition and a tire using the same.
Description
본 발명은 고무-강선 코드의 복합체 재단물의 부식의 시발이 되는 코드지의 끝부분에 모듈러스(modulus)가 높고, 전기 저항이 큰 고무조성물로 제조된 압연물을 피복하여 응력 집중 방지 및 부식속도를 크게 늦출 수 있는 고무조성물 및 이를 이용한 타이어에 관한 것이다.The present invention is to cover the rolling material made of a rubber composition with a high modulus and a high electrical resistance at the end of the cord paper, which is the start of the corrosion of the composite cutting of the rubber-wire cord, to prevent stress concentration and greatly increase the corrosion rate It relates to a rubber composition that can be slowed down and a tire using the same.
타이어의 내구력 향상 및 보강재료용 황동이 표면 처리된 강선 코드(brass coated steel cord)의 부식을 억제하는 방법으로는 크게 강선 코드의 구조를 개선하는 방법과 고무 배합물의 조성물 변화를 통한 접착력을 증가시키는 방법이 있다.The method of improving the durability of the tire and suppressing the corrosion of the brass coated steel cord with brass for reinforcing materials greatly improves the structure of the steel cord and increases the adhesive strength through the change of the composition of the rubber compound. There is a way.
코드 구조 개선을 통한 방법은 오픈(open)구조 혹은 단순 구조로 고무의 침투성을 향상시켜 코드 내부의 동공을 통한 수분 및 공기 침투 억제 및 필라멘트간 마찰을 억제하여 부식을 억제시키는 방법이 있으나, 오픈 구조의 경우 압연 작업시 텐션을 잃어버리기 쉬우며, 단순 구조의 코드의 경우 고무 침투성 개선 등으로 개선이 가능하다. 그러나 벨트 층간의 분리가 시작되는 원인은 제단 작업 후 노출되어진 강선 코드 끝 부분에서는 고무와의 접착이 되지 않고, 응력 집중으로 인한 고무의 찢김 현상이 집중적으로 일어나며, 또한 수분 등이 침투하여 부식으로 인한 접착력 하락으로 인한 층간의 분리현상이 급격이 진행되기 때문이다.The code structure improvement method is an open structure or a simple structure to improve the permeability of rubber to suppress moisture and air penetration through the pupils inside the cord and to suppress corrosion between filaments, but to prevent corrosion. In the case of rolling, it is easy to lose tension during rolling, and in the case of a simple structure of the cord, it is possible to improve it by improving rubber permeability. However, the cause of the separation between the belt layers is that the rubber wire ends exposed after the cutting work are not adhered to the rubber, but the tearing of the rubber due to stress concentration occurs intensively. This is due to the rapid progress of separation between layers due to the drop in adhesion.
본 발명은 상기와 같은 종래 기술의 문제점을 해결하기 위해 안출된 것으로, 본 발명의 목적은 타이어용 고무-강선 코드의 복합체 재단물의 부식의 시발이 되는 코드지의 끝부분에 모듈러스가 높고 전기 저항이 큰 조성물로 제조된 압연물을 피복하여 응력 집중 방지 및 부식속도를 크게 늦출 수 있는 고무조성물 및 이를 이용한 타이어를 제공하는 것이다.The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is a high modulus and high electrical resistance at the end of the cord paper which is the start of the corrosion of the composite cutting of the rubber-steel cord for tires It is to provide a rubber composition and a tire using the same by coating a rolled product made of the composition to prevent stress concentration and significantly reduce the corrosion rate.
도 1은 고무-강선 코드 복합체 재단물에 본 발명의 일예에 따른 고무조성물로 제조된 압연물을 피복한 상태도,1 is a state in which a rolled product made of a rubber composition according to one embodiment of the present invention is coated on a rubber-steel cord composite cut;
도 2는 타이어 코드지의 끝부분에 본 발명의 일예에 따른 고무조성물로 제조된 압연물을 피복한 상태 단면도이다.2 is a cross-sectional view of a state in which a rolled product made of a rubber composition according to an embodiment of the present invention is coated on an end portion of a tire cord paper.
본 발명의 고무 조성물은 원료고무 100중량부에 대하여 카본블랙 20∼60중량부 및 요오드 값이 100∼200㎡/g인 실리카 10∼40중량부를 포함하고, 전기저항이 10E8Ω·m 이상인 것을 특징으로 한다.The rubber composition of the present invention comprises 20 to 60 parts by weight of carbon black and 10 to 40 parts by weight of silica having an iodine value of 100 to 200 m 2 / g based on 100 parts by weight of the raw material rubber, and has an electrical resistance of 10E.8Ωm It is characterized by the above.
일반적으로 전기 저항은 실리카의 함량이 증가함에 따라 증가하고, 카본 블랙의 함량이 증가함에 따라 감소하는 경향을 보임으로, 본 발명의 고무조성물은 전기 저항 값의 조절을 위해 카본블랙/실리카의 함량을 상기와 같이 조절한 것을 특징으로 한다.In general, the electrical resistance increases with increasing silica content, and decreases with increasing carbon black content. Thus, the rubber composition of the present invention increases the carbon black / silica content to control the electrical resistance value. It is characterized in that the adjustment as described above.
본 발명의 고무조성물에는 가류제로서 유황, 가류촉진제, 공정오일, 아연화 등과 같은 통상의 타이어용 고무조성물에 첨가되는 첨가제들을 함유시킬 수 있다.The rubber composition of the present invention may contain additives added to conventional rubber compositions for tires such as sulfur, vulcanization accelerators, process oils, galvanization and the like as vulcanizing agents.
또한 본 발명의 타이어는 상기 고무 조성물로 제조된 압연물을 고무-강선 코드 복합체 재단물의 노출된 끝부분에 피복하여 제조한 것을 특징으로 한다.The tire of the present invention is also characterized in that the rolled product made of the rubber composition is coated on the exposed end of the rubber-steel cord composite cutting.
일반적으로 금속의 부식은 근본적으로 전기 화학적 반응으로서 산화·환원에 의하여 발생한다. 부식은 산화와 환원반응이 동시에 같은 속도로 금속 표면에서 발생하는 것으로, 타이어용 코드로 사용하는 고무-강선 코드의 복합체인 경우 강선 코드는 양극으로 고무는 음극으로 작용하게 된다. 부식 반응 즉, 금속 강선의 산화반응시 발생하는 전자는 고무(음극)을 통하여 이동하여 표면내에 존재하는 여러가지 이온, 예컨대 산성 조건에서는 주로 수소이온, 중성 조건하에서는 수분 및 공기, 염기 조건하에서는 수분 및 산소 혹은 공기 등과 반응하여 전자를 소모시키므로써 부식 반응이 진행하게 된다. 이때 산화로 인하여 발생된 전자의 이동 속도는 고무의 전기 저항과 아주 밀접한 관련이 있다. 예로서 고무의 전기 저항이 매우 높으면, 전자의 이동이 어려워져 부식 반응이 일어나기 어려우며, 고무의 전기 저항이 낮으면, 갈바닉 커플링(galvanic coupling)에 의한 부식 반응이 빠르게 진행된다.In general, the corrosion of metals is basically an electrochemical reaction and is caused by oxidation and reduction. Corrosion occurs on the metal surface at the same rate of oxidation and reduction, and in the case of a rubber-steel cord composite used as a tire cord, the steel wire cord is the anode and the rubber is the cathode. The electrons generated during the corrosion reaction, ie, the oxidation of metal wires, move through the rubber (cathode) to form various ions, such as hydrogen ions under acidic conditions, moisture and air under neutral conditions, and moisture and oxygen under basic conditions. Alternatively, the corrosion reaction proceeds by reacting with air to consume electrons. At this time, the movement speed of electrons generated by oxidation is closely related to the electrical resistance of rubber. For example, if the electrical resistance of the rubber is very high, the electrons are difficult to move, which makes it difficult to cause a corrosion reaction. If the rubber is low, the corrosion reaction by galvanic coupling proceeds quickly.
본 발명의 타이어는 이와 같은 원리를 기초로 하여 부식속도를 늦추기 위해타이어용 간선 코드의 복합체 재단물의 끝부분에 전기 저항이 큰 배합 고무조성물의 압연물을 피복한 것을 특징으로 한다.The tire of the present invention is characterized by coating a rolled product of a compound rubber composition having high electrical resistance at the end of the composite cutting of the trunk cord for a tire in order to slow down the corrosion rate based on this principle.
즉, 본 발명의 타이어는 부식의 시발점이 되는 고무 강선 코드 복합체 재단물로 된 벨트 끝부분에 카본블랙 20∼60중량부와 함께 요오드 값이 100∼200㎡/g인 실리카를 10∼40중량부 사용한 배합 고무로서 전기 저항이 10E8Ω·m 이상인 본 발명의 배합고무 조성물로 된 압연물을 부착하여 제조된다.That is, the tire of the present invention is 10 to 40 parts by weight of silica having an iodine value of 100 to 200 m 2 / g together with 20 to 60 parts by weight of carbon black at the end of the belt made of rubber steel wire cord composite cut that is the starting point of corrosion Used compound rubber with electrical resistance of 10E8Ωm It is produced by adhering the rolled product of the compounded rubber composition of the present invention described above.
본 발명의 고무조성물로 된 압연물의 부착 방법은 다음과 같다.The method of attaching the rolled product made of the rubber composition of the present invention is as follows.
도 1 및 도 2a와 같이, 고무-코드 복합체 재단물(1) 끝부분에 전기 저항이 10E8Ω·m 이상인 고무조성물로 제조된 압연물(2)을 부착하는 것으로, 두께가 최소한 0.5mm 이상이고, 넓이가 1.0∼5.0㎝인 캡 모양의 압연물을 노출된 코드 끝부분에 안전하게 피복한다. 승용차용 타이어의 경우 성형 작업시 밸트 코드 끝부분에 상기 고무 압연물을 도 2b와 같이, 패치(patch) 모양으로 부착할 수 있다.1 and 2a, the electrical resistance at the end of the rubber-cord composite cut 1 is 10E.8Ωm By attaching the rolled product 2 made of the above rubber composition, a cap-shaped rolled product having a thickness of at least 0.5 mm or more and a width of 1.0 to 5.0 cm is safely covered on the exposed cord end. In the case of a tire for a passenger car, the rubber rolled material may be attached to the end of the belt cord during molding, as shown in FIG. 2B, in the form of a patch.
이하 본 발명을 하기의 실시예 및 비교예에 의하여 보다 구체적으로 설명한다. 하기의 실시예는 본 발명을 예시하기 위한 예에 지나지 않으며 본 발명의 보호범위를 제한하는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to the following Examples and Comparative Examples. The following examples are merely examples for illustrating the present invention and do not limit the protection scope of the present invention.
실시예 및 비교예Examples and Comparative Examples
표 1의 조성을 갖는 고무 조성물을 통상의 방법으로 제조하였다. ASTM D2229 방법에 의거하여 접착시편을 만든 다음 전기 저항을 측정하였고, 그 결과를 표 1에 나타내었다. 부식속도의 측정은 5%염 수용액(NaCl)으로 완충용액(NaAc./Ac.H)을 이용하여 pH 4에서 시험을 실시하였으며, 금속이온 착물 형성제로 오르토 페난트롤린 (orthophenantroline)을 사용하였다. 부식속도는 산화형 기울기(βa), 환원형 기울기(βa)와 분극저항(Rp)으로부터 구한 분극전류(I corr) 값으로, 단위는 MPY(milli-inched per year)이다.A rubber composition having the composition of Table 1 was prepared in a conventional manner. Adhesive specimens were prepared according to the ASTM D2229 method, and the electrical resistances were measured. The results are shown in Table 1 below. The corrosion rate was measured at pH 4 using 5% salt aqueous solution (NaCl) using a buffer solution (NaAc./Ac.H), and orthophenantroline was used as a metal ion complexing agent. The corrosion rate is the value of polarization current (I corr) obtained from the oxidized slope (βa), the reduced slope (βa) and the polarization resistance (Rp). The unit is milli-inched per year (MPY).
표 1Table 1
비교예와 같이 N330 카본블랙을 단독으로 60중량부 이상 사용하면 강선 코드의 부식속도가 매우 빨랐다. 그러나 실시예와 같이 실리카의 사용량이 증가됨에 따라 전기저항이 급격히 증가되며, 부식속도는 급격히 감소하였다.As in the comparative example, when the N330 carbon black alone was used in an amount of 60 parts by weight or more, the corrosion rate of the steel wire cord was very fast. However, as the amount of silica increases, the electrical resistance increases rapidly, and the corrosion rate decreases rapidly as in the example.
이상에서 알 수 있는 바와 같이, 본 발명은 전기저항이 10E8Ω·m 이상인 실리카가 함유된 배합 고무조성물로 압연물을 제조하여 강선 코드 복합체 재단물의 부식 시발점인 끝부분을 피복함으로써 강선 코드의 부식 소요를 크게 억제하고, 이를 완제품 타이어에 적용시 응력집중방지 및 부식이 현저히 억제되어 내구력 향상 및 재생횟수를 늘릴 수 있는 효과를 갖는다.As can be seen from the above, the present invention has an electrical resistance of 10E.8Ωm By manufacturing a rolled product with the above-mentioned silica-containing rubber composition and covering the end of the steel wire cord composite cutting, the corrosion start point of the steel wire cord is greatly suppressed. It is suppressed and has the effect of improving durability and increasing the number of regenerations.
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| KR10-2000-0059351A KR100368636B1 (en) | 2000-10-09 | 2000-10-09 | Rubber composition for inhibiting corrosion of tire steel cord and tire using the same |
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-2000-0059351A KR100368636B1 (en) | 2000-10-09 | 2000-10-09 | Rubber composition for inhibiting corrosion of tire steel cord and tire using the same |
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| Publication Number | Publication Date |
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| KR20020028394A KR20020028394A (en) | 2002-04-17 |
| KR100368636B1 true KR100368636B1 (en) | 2003-01-24 |
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| KR102605834B1 (en) * | 2021-09-16 | 2023-11-29 | 넥센타이어 주식회사 | Tire |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930019437A (en) * | 1992-03-23 | 1993-10-18 | 윤양중 | Pneumatic tires with belt layer composed of composite of high hardness rubber and continuous fiber |
| JPH08183886A (en) * | 1994-12-28 | 1996-07-16 | Sumitomo Rubber Ind Ltd | Tire tread rubber composition |
| US5739198A (en) * | 1996-03-18 | 1998-04-14 | The Goodyear Tire & Rubber Company | Rubber composition and tire with tread thereof |
| KR19990012314A (en) * | 1997-07-29 | 1999-02-25 | 홍건희 | Rubber composition for tire tread |
-
2000
- 2000-10-09 KR KR10-2000-0059351A patent/KR100368636B1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930019437A (en) * | 1992-03-23 | 1993-10-18 | 윤양중 | Pneumatic tires with belt layer composed of composite of high hardness rubber and continuous fiber |
| JPH08183886A (en) * | 1994-12-28 | 1996-07-16 | Sumitomo Rubber Ind Ltd | Tire tread rubber composition |
| US5739198A (en) * | 1996-03-18 | 1998-04-14 | The Goodyear Tire & Rubber Company | Rubber composition and tire with tread thereof |
| KR19990012314A (en) * | 1997-07-29 | 1999-02-25 | 홍건희 | Rubber composition for tire tread |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20020028394A (en) | 2002-04-17 |
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