KR20020082344A - Bladder rubber composition improved fstigue to failure property - Google Patents

Bladder rubber composition improved fstigue to failure property Download PDF

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KR20020082344A
KR20020082344A KR1020010021728A KR20010021728A KR20020082344A KR 20020082344 A KR20020082344 A KR 20020082344A KR 1020010021728 A KR1020010021728 A KR 1020010021728A KR 20010021728 A KR20010021728 A KR 20010021728A KR 20020082344 A KR20020082344 A KR 20020082344A
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rubber
weight
parts
rubber composition
bladder
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KR1020010021728A
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Korean (ko)
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최윤희
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금호산업 주식회사
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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
    • C08L11/00—Compositions of homopolymers or copolymers of chloroprene
    • 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
    • B60C1/0025—Compositions of the sidewalls
    • 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
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
    • C08L23/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
    • 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
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • 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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  • 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)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE: Provided is a bladder rubber composition having improved fatigue-resistance, which contains a carbon black having low coloring degree and broad particle size distribution. CONSTITUTION: The bladder rubber composition contains: 100pts.wt. of a raw rubber comprising 70-90pts.wt. of butyl rubber having an unsaturation degree of 1.2-1.8mol% and 10-30pts.wt. of butyl rubber having an unsaturation degree of 0.6-1.0mol%; about 10pts.wt. of neoprene rubber containing a chlorine group(-Cl); 40-80pts.wt. of the carbon black having an iodine adsorption value of 80-88g/kg, a DBP oil absorption amount of 90-110ml/100g, a nitrogen adsorption specific surface area of 65-75m2/g, and a coloring degree of 60-80%.

Description

내피로 특성이 개선된 블래더 고무조성물{Bladder rubber composition improved fstigue to failure property}Bladder rubber composition improved fstigue to failure property

본 발명은 내피로 특성이 개선된 블래도 고무조성물에 관한 것이다.The present invention relates to a blado rubber composition having improved fatigue resistance.

일반적으로 블래더는 가류 및 성형 등의 타이어 제조공정에서 주로 사용되고 있다. 가류 블래더의 경우 타이어와 증기, 열수, 질소가승 등의 열공급원에 의한 고온하에서 수백회 이상의 타이어 제조를 위해 장시간의 라이프 사이클을 유지하여야 하는 특성을 지녀야 한다. 또한 성형 블래더의 경우는 수백회의 굴신운동을 통하 타이어 성형을 위해 수백회 이상 지속될 수 있는 라이프 사이클을 유지하여야 한다.In general, bladder is mainly used in tire manufacturing processes such as vulcanization and molding. Vulcanization bladder must have the characteristics of maintaining a long life cycle for the manufacture of tires hundreds of times under high temperature by the heat source such as tires and steam, hot water, nitrogen heating. In addition, the molding bladder must maintain a life cycle that can last hundreds of times for forming the tire through hundreds of flexing exercises.

즉, 내피로 특성을 향상시킨 블래더는 인장물성 및 모듈러스가 낮아야 하며 발열이 적어 고무조성물의 노화에 영향을 미치지 않아야 한다.In other words, the bladder with improved fatigue resistance should have low tensile properties and modulus and less heat generation and thus should not affect the aging of the rubber composition.

상기와 같이 내피로 특성이 중요한 블래더를 제조하기 위해 종래의 블래더 고무조성물은 입자경이 비교적 구조가 발달한 카본블랙을 사용하였으나 기가류 고무배합물의 점도 및 발열이 증가하여 공정성이 하락하고 모듈러스가 상승하여 내피로 특성이 하락하는 문제가 있다.The conventional bladder rubber composition uses carbon black having a relatively low particle diameter in order to produce a bladder having important fatigue resistance as described above, but the processability and modulus decrease due to the increase in viscosity and heat generation of the gas-based rubber compound. There is a problem that the characteristics of the endothelial fatigue decreases.

본 발명은 공지의 블래더 고무조성물에 있어서, 종래 사용하던 카본블랙에 비해 입자경과 구조가 유사하지만 착색도가 낮으면서 입자크기 분포도가 넓은 카본블랙을 사용하여 내피로 특성이 향상된 블래더 고무조성물의 제공을 목적으로 한다.The present invention provides a bladder rubber composition having improved fatigue resistance by using carbon black having a similar particle size and structure but having a lower particle size and a wider particle size distribution in the known bladder rubber composition. For the purpose.

본 발명의 내피로 특성이 개선된 블래도 고무조성물은 공지의 블래더 고무조성물에 있어서, 불포화도가 1.2∼1.8몰%인 부틸고무 70∼90 중량부 및 불포화도가 0.6∼1.0몰%인 부틸고무 10∼30 중량부의 혼합고무로 구성된 원료고무 100 중량부에 대하여 염소기(-Cl)를 함유한 네오프렌 고무 10 중량부 이내, 요오드 흡착가가 80g/kg∼88g/kg, DBP 흡유량 90㎖/100g∼110㎖/100g, 질소흡착 비표면적이 65m2/g∼75m2/g, 착색도가 60%∼80%인 카본블랙 40∼80 중량부 포함하는 것을 특징으로 한다.Blado rubber composition with improved fatigue resistance of the present invention is a known bladder rubber composition, 70-90 parts by weight of butyl rubber having an unsaturation of 1.2 to 1.8 mol% and butyl rubber 10 having an unsaturation of 0.6 to 1.0 mol% Less than 10 parts by weight of neoprene rubber containing chlorine group (-Cl) with respect to 100 parts by weight of raw rubber composed of -30 parts by weight of mixed rubber, iodine adsorption value of 80g / kg ~ 88g / kg, DBP oil absorption 90ml / 100g ~ 110 Ml / 100g, nitrogen adsorption specific surface area is 65m 2 / g to 75m 2 / g, characterized in that it comprises 40 to 80 parts by weight of carbon black having a coloration of 60% to 80%.

부틸고무의 불포화도는 고무의 가류반응에 있어서 중요한 인자로 작용되며, 이는 또한 가류 블래더의 지속적인 열량의 유입과 반복적인 굴신운동을 해야하기 때문에 불포화도의 특성이 중요한 인자이다. 즉 본 발명에서 원료고무 중 불포화도가 1.2∼1.8몰%인 부틸고무는 70∼90 중량부 사용하고, 중 불포화도가 0.6∼1.0몰%인 부틸고무를 10∼30 중량부 사용하는 이유는 가류 반응속도 및 노화 후의 인장물성 유지력이 실험적으로 우수하기 때문이다.Unsaturation of butyl rubber acts as an important factor in the vulcanization of rubber, which is also an important factor because of the continuous influx of calories and repeated flexural movement. That is, in the present invention, 70 to 90 parts by weight of butyl rubber having 1.2 to 1.8 mol% of unsaturation in raw material rubber and 10 to 30 parts by weight of butyl rubber having 0.6 to 1.0 mol% of medium unsaturation are used. And tensile strength retention after aging is experimentally excellent.

본 발명에서 사용하는 카본블랙은 원료고무 100 중량부에 대하여 40 중량부 미만 사용시 내피로 특성의 향상에 필요한 물성을 얻을 수 없는 문제가 있고, 80 중량부 이상 사용하면 카본블랙 이외에 고무조성물에 첨가되는 기타 첨가제의 고무와의 상용성을 하락시켜 고무의 물성이 하락하는 문제가 있어 카본블랙의 사용은 원료고무 100 중량부에 대하여 40∼80 중량부를 유지하는 것이 좋다.The carbon black used in the present invention has a problem in that physical properties necessary for improvement of fatigue resistance are not obtained when less than 40 parts by weight of the raw material rubber is used, and when used in an amount of 80 parts by weight or more, it is added to the rubber composition. Since there is a problem that the physical properties of the rubber is lowered by reducing the compatibility of the rubber with other additives, it is preferable to maintain 40 to 80 parts by weight based on 100 parts by weight of the raw material rubber.

또한 본 발명에서 사용하는 카본블랙의 특성으로는 요오드 흡착가가 80g/kg∼88g/kg, DBP 흡착가 90㎖/100g∼110㎖/100g, 질소흡착 비표면적이 65m2/g∼75m2/g, 착색도가 60%∼80%인 것을 사용하는 것이 좋은데 실험적으로 이러한 수치의 특성을 지닌 카본블랙을 고무조성물에 첨가하여 블래더 고무를 제조시 내피로 특성이 향상된 블래더 고무를 얻을 수 있다.In addition to the characteristics of the carbon black used in the present invention is an iodine adsorption value is 80g / kg~88g / kg, DBP adsorption value 90㎖ / 100g~110㎖ / 100g, the nitrogen adsorption specific surface area of 65m 2 / g~75m 2 / g, It is better to use 60% to 80% of the coloration, and experimentally, the carbon black having such a numerical value can be added to the rubber composition to obtain bladder rubber with improved fatigue resistance when producing bladder rubber.

한편 네오프렌 고무는 이소프렌 고무에서 메틸렌기가 염소기로 치환된 고무로 열에 의하여 염소기가 해리되어 활성화에너지가 낮아져 일반 부틸고무에 비해 가류반응성이 좋아지는 특성이 있는 것으로 본 발명에서 원료고무 100 중량부에 대하여 10 중량부 이내로 제한한 이유는 10 중량부 이상에서 특별한 효과를 얻을 수 없이 고무배합물의 비용이 상승되어 좋지 않기 때문이다.On the other hand, neoprene rubber is a rubber in which methylene groups are substituted with chlorine groups in isoprene rubber, and the chlorine group is dissociated by heat to lower the activation energy, so that the vulcanization reactivity is better than that of general butyl rubber. The reason for limiting to the part is that the rubber compound is not good because the cost of the rubber compound is not increased at 10 parts by weight or more.

이하 본 발명을 다음의 비교예, 실시예 및 시험예에 의하여 설명하고자 하나 이들이 본 발명의 기술적 범위를 한정하는 것은 아니다.Hereinafter, the present invention will be described by the following Comparative Examples, Examples, and Test Examples, but they do not limit the technical scope of the present invention.

<비교예>Comparative Example

아래의 표 1과 같이 불포화도가 1.6몰%인 부틸고무 80 중량부와 불포화도가 0.8몰%인 부틸고무20 중량부로 구성된 원료고무 100 중량부에 대하여, 네오프렌 고무 5 중량부, 하기 표 2와 같은 특성의 카본블랙(카본블랙 1) 50 중량부 및 공지의 고무조성물에 사용하는 산화아연 5 중량부, 스테아린산 1 중량부, 공정유 6.5 중량부, 가류제 6 중량부를 첨가하여 160℃에서 30분 동안 가류하여 고무시편을 제조하였다.As shown in Table 1 below, with respect to 100 parts by weight of the raw material rubber consisting of 80 parts by weight of butyl rubber having an unsaturated degree of 1.6 mol% and 20 parts by weight of butyl rubber having an unsaturated degree of 5 parts by weight of neoprene rubber, the characteristics as shown in Table 2 below. 50 parts by weight of carbon black (carbon black 1) and 5 parts by weight of zinc oxide used in a known rubber composition, 1 part by weight of stearic acid, 6.5 parts by weight of process oil, and 6 parts by weight of vulcanizing agent were added and vulcanized at 160 ° C. for 30 minutes. To prepare a rubber specimen.

<실시예><Example>

아래의 표 1과 같이 불포화도가 1.6몰%인 부틸고무 80 중량부와 불포화도가 0.8몰%인 부틸고무20 중량부로 구성된 원료고무 100 중량부에 대하여, 네오프렌 고무 5 중량부, 하기 표 2와 같은 특성의 카본블랙(카본블랙 2) 50 중량부 및 공지의 고무조성물에 사용하는 산화아연 5 중량부, 스테아린산 1 중량부, 공정유 6.5 중량부, 가류제 6 중량부를 첨가하여 160℃에서 30분 동안 가류하여 고무시편을 제조하였다.As shown in Table 1 below, with respect to 100 parts by weight of the raw material rubber consisting of 80 parts by weight of butyl rubber having an unsaturated degree of 1.6 mol% and 20 parts by weight of butyl rubber having an unsaturated degree of 5 parts by weight of neoprene rubber, the characteristics as shown in Table 2 below. 50 parts by weight of carbon black (carbon black 2) and 5 parts by weight of zinc oxide used in a known rubber composition, 1 part by weight of stearic acid, 6.5 parts by weight of process oil, and 6 parts by weight of vulcanizing agent were added and vulcanized at 160 ° C. for 30 minutes. To prepare a rubber specimen.

표 1. 비교예 및 실시예의 고무조성물Table 1. Rubber Compositions of Comparative Examples and Examples

항목Item 비교예Comparative example 실시예Example 부틸고무*Butyl Rubber * 8080 8080 부틸고무**Butyl Rubber ** 2020 2020 네오프렌Neoprene 55 55 산화아연Zinc oxide 55 55 스테아린산Stearic acid 1One 1One 공정유Process oil 6.56.5 6.56.5 카본블랙 1Carbon Black 1 5050 -- 카본블랙 2Carbon black 2 -- 5050 가류제Vulcanizing agent 66 66

* 부틸고무 1은 불포화도가 1.6몰%인 부틸고무임* Butyl rubber 1 is butyl rubber with 1.6 mole% unsaturation

** 부틸고무 2는 불포화도가 0.8몰%인 부틸고무임** Butyl rubber 2 is butyl rubber with 0.8 mol% unsaturation

표 2. 비교예 및 실시예에 사용된 카본블랙의 특성Table 2. Properties of Carbon Black Used in Comparative Examples and Examples

항 목Item 카본블랙 1Carbon Black 1 카본블랙 2Carbon black 2 콜로이달특성Colloidal characteristics 요오드 흡착가(g/kg)Iodine adsorption value (g / kg) 8282 8484 질소흡착 비표면적(m2/g)Nitrogen adsorption specific surface area (m 2 / g) 7979 6969 DBP 흡착가(㎖/100g)DBP adsorption value (ml / 100g) 102102 101101 착색도(%)Coloration degree (%) 103103 6767 입자분포도특성Particle Distribution Diagram Characteristics 평균크기(nm)Average size (nm) 102102 129129 입자경 분포도(nm)Drop size distribution (nm) 6161 8282 무게평균 입자크기(nm)Weight average particle size (nm) 223223 281281

<시험예><Test Example>

상기 비교예 및 실시예의 고무시편에 대하여 공정성, 인장물성, F.T.F(Fatigue to failure) 등의 물성을 공지의 방법을 이용하여 측정하고 그 결과를 아래의 표 3에 정리하여 나타내었다.The rubber specimens of Comparative Examples and Examples were measured for physical properties such as fairness, tensile properties, and F.T.F (Fatigue to failure) using a known method, and the results are summarized in Table 3 below.

표 3. 비교예 및 실시예 시편의 물성측정 결과Table 3. Results of Measurement of Physical Properties of Comparative Examples and Examples

항 목Item 비교예Comparative example 실시예Example 공정성Fairness 100℃ 점도100 ℃ viscosity 3939 3232 스코치 타임(t5)Scorch time (t5) 47.447.4 53.453.4 인장물성Tensile Properties 100% 모듈러스(MPa)100% Modulus (MPa) 2.62.6 2.42.4 300% 모듈러스(MPa)300% modulus (MPa) 12.212.2 9.89.8 인장강도(MPa)Tensile Strength (MPa) 19.319.3 16.116.1 신율(%)% Elongation 470470 520520 인열강도 1(kN/m)*Tear strength 1 (kN / m) * 45.845.8 46.246.2 인열강도 2(kN/m)**Tear strength 2 (kN / m) ** 25.725.7 28.228.2 F.T.F***(kcycles)F.T.F *** (kcycles) 평균시간Average time 72947294 19711971 최대시간Time 1094710947 51125112

* 인열강도 1은 상온에서의 측정치임* Tear strength 1 is measured at room temperature

** 인열강도 12는 100℃에서 3일 노화 후 측정치임** Tear strength 12 is measured after 3 days of aging at 100 ° C.

*** F.T.F : 박복적인 굴신운동에 의한 내피로 특성을 측정하는 시험방법*** F.T.F: Test method to measure endothelial characteristics by swelling flexion exercise

상기 표 2에서처럼 300% 모듈러스와 인장강도는 비교예 대비 실시예가 낮은 수준을 보이고 있으나, 신율과 인열강도가 높았으며, 특히 100℃ 점도가 비교예에 비해 7 포이트 이상 하락하고 있어 점도에 의한 공정성 개선이 개선됨을 알 수 있으며, 스코치 안정성 또한 증가하고 있다.As shown in Table 2, the 300% modulus and tensile strength showed a lower level than the comparative example, but the elongation and tear strength were high. In particular, the viscosity at 100 ° C. was lowered by 7 or more than that of the comparative example, thereby providing fairness due to viscosity. It can be seen that the improvement is improved, and scorch stability is also increasing.

상기 표 2의 물성측정 결과에서처럼 본 발명의 블래더 고무조성물에 의한 고무시편이 비교예와 비교해볼 때 블래더의 수명화 직접적으로 관계되는 인열강도 및 F.T.F 특성이 크게 향상됨을 알 수 있다. 또한 균열(failure)이 일어나기까지의 평균시간을 비교할 때 비교예 대비 실시예 고무시편이 370% 증가하였으며, 최대시간까지의 측정은 214% 개선되었다.As can be seen from the measurement results of the physical properties of Table 2, the rubber specimens of the bladder rubber composition of the present invention have a significant improvement in tear strength and F.T.F characteristics directly related to the life of the bladder when compared with the comparative example. In addition, when comparing the average time to the failure (failure), the rubber sample was increased by 370% compared to the comparative example, the measurement up to the maximum time was improved by 214%.

이와 같은 결과로부터 본 발명의 블래더 고무조성물에 의해 블래더 고무제조시 내피로 특성 및 인열강도가 현저히 개선되어 블래더의 수명향상 역시 가능하다.From these results, the bladder rubber composition of the present invention significantly improves the fatigue resistance and tear strength during the manufacture of the bladder rubber, thereby improving the life of the bladder.

Claims (3)

공지의 블래더 고무조성물에 있어서, 원료고무 100 중량부에 대하여 염소기(-Cl)를 함유한 네오프렌 고무 10 중량부 이내, 카본블랙 40∼80 중량부 포함하는 것을 특징으로 하는 내피로 특성이 개선된 블래도 고무조성물The known bladder rubber composition has improved fatigue resistance, characterized in that it contains within 40 parts by weight of carbon black and 10 parts by weight of neoprene rubber containing chlorine group (-Cl) to 100 parts by weight of raw rubber. Blado Rubber Composition 제 1항에 있어서, 원료고무는 불포화도가 1.2∼1.8몰%인 부틸고무 70∼90 중량부 및 불포화도가 0.6∼1.0몰%인 부틸고무 10∼30 중량부의 혼합고무임을 특징으로 하는 내피로 특성이 개선된 블래더 고무조성물According to claim 1, wherein the raw material rubber is characterized in that the fatigue resistance characteristics of 70 to 90 parts by weight of butyl rubber having an unsaturation of 1.2 to 1.8 mol% and 10 to 30 parts by weight of butyl rubber having an unsaturation of 0.6 to 1.0 mol%. Improved Bladder Rubber Composition 제 1항에 있어서, 카본블랙은 요오드 흡착가가 80g/kg∼88g/kg, DBP 흡유량이 90㎖/100g∼110㎖/100g, 질소흡착 비표면적이 65m2/g∼75m2/g, 착색도가 60%∼80% 임을 특징으로 하는 내피로 특성이 개선된 블래더 고무조성물The carbon black has an iodine adsorption value of 80 g / kg to 88 g / kg, a DBP oil absorption of 90 ml / 100 g to 110 ml / 100 g, and a nitrogen adsorption specific surface area of 65 m.2/ g-75m2/ g, coloration 60% to 80% Bladder rubber composition with improved fatigue resistance
KR1020010021728A 2001-04-23 2001-04-23 Bladder rubber composition improved fstigue to failure property KR20020082344A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106117668A (en) * 2016-08-30 2016-11-16 刘平 A kind of corrosion resistant rubber composite of antistatic and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61185548A (en) * 1985-02-13 1986-08-19 Yokohama Rubber Co Ltd:The Rubber composition for vulcanized bladder
KR970015656A (en) * 1995-09-05 1997-04-28 홍건희 Bladder rubber composition for tire vulcanization with improved thermal conductivity and durability
JPH10130441A (en) * 1996-10-25 1998-05-19 Bridgestone Corp Rubber composition for vulcanizing bladder
KR20010001493A (en) * 1999-06-04 2001-01-05 신형인 Excellent Thermal Conductive Rubber Compound for Bladder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61185548A (en) * 1985-02-13 1986-08-19 Yokohama Rubber Co Ltd:The Rubber composition for vulcanized bladder
KR970015656A (en) * 1995-09-05 1997-04-28 홍건희 Bladder rubber composition for tire vulcanization with improved thermal conductivity and durability
JPH10130441A (en) * 1996-10-25 1998-05-19 Bridgestone Corp Rubber composition for vulcanizing bladder
KR20010001493A (en) * 1999-06-04 2001-01-05 신형인 Excellent Thermal Conductive Rubber Compound for Bladder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106117668A (en) * 2016-08-30 2016-11-16 刘平 A kind of corrosion resistant rubber composite of antistatic and preparation method thereof

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