KR100250641B1 - A rubber composition containing the liquidified epdm - Google Patents

A rubber composition containing the liquidified epdm Download PDF

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KR100250641B1
KR100250641B1 KR1019970053299A KR19970053299A KR100250641B1 KR 100250641 B1 KR100250641 B1 KR 100250641B1 KR 1019970053299 A KR1019970053299 A KR 1019970053299A KR 19970053299 A KR19970053299 A KR 19970053299A KR 100250641 B1 KR100250641 B1 KR 100250641B1
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rubber
weight
rubber composition
parts
antiozonants
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KR1019970053299A
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KR19990032299A (en
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고진환
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신형인
금호산업주식회사
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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
    • 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
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • 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
    • 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
    • C08L7/00—Compositions of natural rubber
    • 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
    • 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
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four 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)
  • Tires In General (AREA)

Abstract

PURPOSE: A rubber composition containing liquefied EPDM rubber is provided to improve resistance against thermal crack or crack caused by ozone of side wall of TBR or PCR automobile tire by applying antioxidants or antiozonants to reduce discoloration of the side wall caused from migration outward-resistance. CONSTITUTION: The rubber composition consists of a blend of natural rubber, styrene-butadiene rubber and butyl rubber as raw material; and other additives such as vulcanization activating agent, reinforcing filler, antioxidants or antiozonants, wax, processing oil, adhesive, sulfur and vulcanizing enhancer. The composition contains 5-15 weight parts of liquefied EPDM rubber as ENB type rubber having less than a molecular weight of 9000 and an iodine value of 10-25 relative to 100 weight parts of raw rubber material. The antioxidants or antiozonants is contained in an amount of 1-2 weight parts.

Description

액상 EPDM 고무를 함유하는 고무조성물Rubber composition containing liquid EPDM rubber

본 발명은 액상 EPDM고무 (Liquidified Ethylene Propylene Diene Rubber)를 함유하는 고무조성물에 관한 것으로, 좀더 상세하게는 TBR 또는 PCR 승용차 타이어에 있어서 사이드 월(side wall) 부위의 오존이나 내열에 의한 크랙을 개선하고 노화방지제의 적용으로 외부로의 표면이동(migration)에 의한 사이드 월부위의 변색을 감소시켜 타이어 외관의 품질을 향상시킨 고무조성물에 관한 것이다.The present invention relates to a rubber composition containing liquid EPDM rubber (Liquidified Ethylene Propylene Diene Rubber), and more particularly, to improve cracks due to ozone or heat resistance at the side wall of a TBR or PCR passenger car tire. The present invention relates to a rubber composition that improves the quality of a tire appearance by reducing discoloration of sidewall portions due to the migration of an anti-aging agent to the outside.

오늘날 타이어의 요구성능은 매우 다양한 소비자들의 기호에 맞게 끔 타이어를 제조하여 공급하는 것이 타이어 제조업계의 궁극적인 목표가 될 수 있다.The demands of today's tires are designed to meet the demands of a wide variety of consumers.

종래에는 사이드 월 부위에 내오존성을 개선하기 위하여 폴리머로 천연고무(NR), 스티렌-부타디엔 고무(SBR)와 부타디엔 고무(BR)를 블렌드한 고무나 천연고무와 부타디엔 고무를 블렌드한 고무에 노화방지제로 6PPD (N-(1,3-DimethylButyl), N'PH-P-Phenyl Diamine), TMDQ(2,2,4-Trimethyl-1,2-Dihydro Quinolin), SPN (Styrenated Phenol), BLE-N (Diphenyl Amine과 아세톤의 반응물) 등을 사용하고, 미세결정 왁스(Microcrystalline Wax)도 고무표면에 피막을 형성하여 정적인 상태에서 오존공격에 의한 크랙을 감소시키기 위하여 2-5phr 정도 사용한다.In order to improve ozone resistance in the sidewall area, an anti-aging agent is used in a rubber blend of natural rubber (NR), styrene-butadiene rubber (SBR) and butadiene rubber (BR) with a polymer, or a rubber blend of natural rubber and butadiene rubber. 6PPD (N- (1,3-DimethylButyl), N'PH-P-Phenyl Diamine), TMDQ (2,2,4-Trimethyl-1,2-Dihydro Quinolin), SPN (Styrenated Phenol), BLE-N (Reactant of diphenyl amine and acetone), and microcrystalline wax is also used on the surface of rubber to reduce cracks due to ozone attack in static state.

그러나, 이들의 방법에 있어서 가장 문제가 되는 것은 노화방지제가 주행중 열이나 오존이 존재하는 대기 중에서 소멸함으로 인하여 노화방지 효과의 감소나 오존 크랙을 발생하여 타이어 수명단축이나, 심한 경우에는 타이어 사고로 이어질 수 있다는 것이다.However, the most problematic in these methods is that the anti-aging agent may be reduced in the atmosphere where heat or ozone is present while driving, thereby reducing the anti-aging effect or causing ozone cracks, which may lead to a reduction in tire life or, in severe cases, tire accidents. Can be.

타이어 주행시 타이어 내부의 온도는 120-140℃, 외부는 55-75℃정도의 열이 발생되므로 노화방지제의 소멸로 인해 오존에 의한 크랙발생을 방지하기에는 거의 불가능하고, 더우기 여름철이나 오존이 많이 발생하는 지역에서는 매우 심각한 실정이다. 노화방지제의 소멸량이 많은 관계로 발생하는 이러한 문제점을 해결하기 위한 노력으로 노화방지제의 양을 많이 적용하여도 효과는 그리 크지 않으며, 이로 인한 표면이동에 의해 오히려 외관품질에 악영향을 미치게 된다.When running tires, the temperature inside the tire is 120-140 ℃ and 55-75 ℃ outside, so it is almost impossible to prevent cracks caused by ozone due to the disappearance of the anti-aging agent. This is very serious in the region. Efforts to solve this problem that occurs due to the large amount of anti-aging agent is applied, but the effect is not very large even if a large amount of the anti-aging agent is applied, thereby adversely affect the appearance quality by the surface movement.

본 발명자 들은 상기와 같은 문제점을 해결하기 위한 연구를 수행하던 중, 타이어에 첨가되는 고무성분과 첨가조제를 변량 적용함으로써 타이어의 오존 크랙을 감소시킬 수 있음을 알아내고 본 발명을 완성하였다.The present inventors have completed the present invention by finding out that it is possible to reduce the ozone crack of the tire by applying a variable amount of the rubber component and the additive aid added to the tire during the research to solve the above problems.

따라서, 본 발명의 목적은 NR/SBR/BR 블렌드 고무에 액상 EPDM 고무를 첨가하여 타이어 사이드 월 부위의 내오존 성능을 향상시킨 새로운 고무조성물을 제공함에 있다.Accordingly, an object of the present invention is to provide a new rubber composition by adding a liquid EPDM rubber to the NR / SBR / BR blend rubber to improve the ozone resistance of the tire side wall.

즉, 본 발명은 원료고무인 NR/SBR/NR 블렌드 고무 100 중량부에 대하여 분자량 9,000 이하, ENB 타입으로서 요오드 값이 10-25인 액상 EPDM 고무 5-10 중량, 노화방지제 1-2 중량부, 왁스 0.5-1 중량부를 함유하는 고무조성물 임을 특징으로 한다.That is, the present invention is a molecular weight of 9,000 or less with respect to 100 parts by weight of NR / SBR / NR blend rubber, a raw material rubber, 5-10 weight of liquid EPDM rubber having an iodine value of 10-25 as ENB type, 1-2 parts by weight of anti-aging agent, wax It is characterized in that the rubber composition containing 0.5-1 parts by weight.

본 발명에 의한 고무조성물은 원료고무인 BR/SBR/BR 블렌드 고무 100 중량부에 대하여 액상 EPDM 고무 5-10 중량부를 함유하고, 노화방지제 1-2 중량부, 왁스 0.5-1 중량부를 함유한다.The rubber composition according to the present invention contains 5-10 parts by weight of liquid EPDM rubber, 100 parts by weight of antioxidant, and 1-2 parts by weight of wax, and 0.5-1 part by weight of wax, based on 100 parts by weight of BR / SBR / BR blend rubber, which is a raw material rubber.

액상 EPDM 고무를 사용하지 않은 공지의 NR/BR 블렌드 고무나 NR/SBR/BR 블렌드 고무에 노화방지제로 6PPD나 TMDQ를 2-4 중량부 적용하고, 왁스를 1-2 중량부를 적용한 경우에 노화방지제는 105℃에서 6일간 방치시 소멸로 인하여 노화방지제 잔류량이 2-3%만 존재하며, 왁스는 C30-C35 카본분포에서는 표면이동에 의한 소멸이 거의 없지만, C25-C27 카본분포에서는 잔류량이 85% 존재한다.Anti-aging agent when 2-4 parts by weight of 6PPD or TMDQ is applied and 1-2 parts by weight of wax is applied to known NR / BR blend rubber or NR / SBR / BR blend rubber which does not use liquid EPDM rubber. The residual amount of anti-aging agent is only 2-3% due to extinction when left at 105 ℃ for 6 days, and the wax has almost no disappearance by surface movement in C30-C35 carbon distribution, but 85% in C25-C27 carbon distribution. exist.

이와 같이, 기존에 사용하던 NR, BR 또는 SBR 고무는 이중결합수가 많아 오존이 고무의 이중결합을 공격하여 고무 분자쇄 절단을 초래하게 됨에 반하여, 본 발명에 사용되는 EPDM 고무는 분자량 9,000 이하, ENB 타입으로서 요오드 값이 10-25이고, 이중결합수가 적으며 공정가공성이 우수한 액상 타입으로서, 기존 고무 블렌드에서의 노화방지제 및 왁스의 사용량을 감소시켜 줌과 동시에 내오존성 향상 및 노화방지제의 표면이동에 의한 외관 품질저하 현상을 감소시킬 수 있다.As described above, the NR, BR or SBR rubbers used in the past have a large number of double bonds, and ozone attacks the double bonds of the rubber, resulting in the cleavage of the molecular chain of the rubber, whereas the EPDM rubber used in the present invention has a molecular weight of 9,000 or less, ENB As a type, it is a liquid type with iodine value of 10-25, low double bond number, and excellent processability.It reduces the amount of anti-aging agent and wax in existing rubber blends, and improves ozone resistance and surface movement of anti-aging agent. It is possible to reduce the appearance deterioration phenomenon.

이하 실시예 및 비교예를 통하여 본 발명을 보다 상세히 설명한다. 그러나, 본 발명이 이들 실시예에 국한되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited to these examples.

[실시예 1]Example 1

다음의 표1에 제시된 조성비와 같이 원료고무로 NR/SBR/BR 블렌드 고무, 액상 EPDM 고무(분자량 : 7,500 : ENB 타입 ; 요오드 값 19), 가류활성제로 산화아연 및 스테아린산, 보강충진제로 카본블랙, 노화방지제로 6PPD (N-1,3-DimethylButyl),N'PH-P-Phenyl Diamine), 왁스로 미세결정 왁스(융점 : 633℃), 공정오일, 점착제로 변형 옥틸페놀 포름알데히드 레진(Modified Octhyl Phenol Formaldehyde Resin), 유황 및 가황촉진제를 첨가하여 벤버리 믹서에서 배합하고 160℃의 온도에서 방출하였다.As shown in the following table 1, NR / SBR / BR blend rubber as raw material rubber, liquid EPDM rubber (molecular weight: 7,500: ENB type; iodine value 19), zinc oxide and stearic acid as vulcanizing agent, carbon black as reinforcing filler, Modified Octhyl Modified Octhyl Phenol Formaldehyde Resin), sulfur and a vulcanization accelerator were added and blended in a Benbury mixer and released at a temperature of 160 ° C.

생성된 고무조성물의 가황조건 및 물성시험을 ASTM 규격에 준하여 시험하였는데, 고무조성물의 조성비와 가황특성 및 물성시험 결과를 다음의 표1 및 표2에 나타내었다.The vulcanization conditions and physical property tests of the resulting rubber compositions were tested according to ASTM standards. The composition ratios, vulcanization characteristics and physical property test results of the rubber compositions are shown in Tables 1 and 2 below.

[실시예 2]Example 2

액상 EPDM 고무를 10 중량부 사용하는 것 이외에는 실시예 1과 동일하게 실시하여 고무조성물을 제조하였는바, 그 고무조성물의 배합조성비와 가황특성 및 물성시험 결과를 표1 및 표2에 나타내었다.A rubber composition was prepared in the same manner as in Example 1 except that 10 parts by weight of the liquid EPDM rubber was used. The compound composition ratios, vulcanization characteristics, and physical property test results of the rubber compositions are shown in Tables 1 and 2.

[실시예 3]Example 3

액상 EPDM 고무를 15 중량부 사용하는 것 외에는 실시예 1과 동일하게 실시하여 고무조성물을 제조하였는바, 그 고무조성물의 배합조성비와 가황특성 및 물성시험 결과를 표1 및 표2에 나타내었다.A rubber composition was prepared in the same manner as in Example 1 except that 15 parts by weight of liquid EPDM rubber was used. The compound composition ratio, vulcanization characteristics, and physical property test results of the rubber composition are shown in Tables 1 and 2.

[비교예 1]Comparative Example 1

액상 EPDM 고무를 사용하지 않은 것 이외에는 실시예 1과 동일하게 실시하여 고무조성무를 제조하였는바, 그 고무조성물의 배합조성비와 가황특성 및 물성시험 결과를 표1 및 표2에 나타내었다.Except not using the liquid EPDM rubber was prepared in the same manner as in Example 1 to prepare a rubber composition bar, the composition ratio of the rubber composition, vulcanization characteristics and physical properties test results are shown in Table 1 and Table 2.

아래의 표2에서 보듯이, NR, BR, SBR 고무를 사용한 경우에는 노화방지제와 옥스를 다량 적용하여도 고무의 특성상 오존시험 결과 정적오존 시험에서도 120 시간 만에 심한 오존크랙이 발생하였고, 액상 EPDM 고무 15 중량부를 함유한 경우에도 120 시간 만에 미세한 오존크랙을 발생시킨 반면에, 본 발명에 의한 액상 EPDM 고무를 함유하는 고무조성물은 이중 결합 수가 적은 액상 EPDM 고무를 5-10 중량부를 함유할 경우, 정적 오존시험에서 140시간 방치해도 전혀 오존크랙의 발생이 없음을 알 수 있다.As shown in Table 2 below, when NR, BR, and SBR rubbers were used, even when a large amount of anti-aging agent and ox was applied, ozone test resulted in severe ozone crack in 120 hours even in static ozone test. In the case of containing 15 parts by weight of rubber, fine ozone crack was generated in 120 hours, whereas the rubber composition containing liquid EPDM rubber according to the present invention contained 5-10 parts by weight of liquid EPDM rubber having a small number of double bonds. In addition, it can be seen that ozone cracks do not occur at all for 140 hours in the static ozone test.

[표 1]TABLE 1

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[표 2]TABLE 2

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Figure kpo00002

Claims (3)

(정정) 원료고무로 천연고무(NR), 스티렌-부타디엔 고무(SBR) 및 부틸고무(BR)의 블렌드 고무와 가류활성제, 보강충진제, 노화방지제, 왁스, 공정오일, 점착제, 유황 및 가황촉진제로 구성된 고무조성물에 원료고무 100 중량부에 대하여 분자량이 9,000 이하인 ENB 타입으로서 요오드 값이 10-25인 액상 EPDM 고무 (Liquidified Ethylene Propylene Diene Rubber)를 5-15 중량부 첨가함을 특징으로 하는 고무조성물.(Correction) As raw material rubber, blend rubber of natural rubber (NR), styrene-butadiene rubber (SBR) and butyl rubber (BR), vulcanizing agent, reinforcing filler, anti-aging agent, wax, process oil, adhesive, sulfur and vulcanization accelerator A rubber composition comprising 5-15 parts by weight of a liquid EPDM rubber (Liquidified Ethylene Propylene Diene Rubber) having an iodine value of 10-25 and an ENB type having a molecular weight of 9,000 or less based on 100 parts by weight of the raw rubber. 제1항에 있어서, 노화방지제는 1-2 중량부를 사용함을 특징으로 하는 고무조성물.The rubber composition according to claim 1, wherein the antioxidant is used in an amount of 1-2 parts by weight. 제1항에 있어서, 왁스는 0.5-1 중량부를 사용함을 특징으로하는 고무조성물.The rubber composition according to claim 1, wherein the wax uses 0.5-1 part by weight.
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Cited By (1)

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KR20210003337A (en) * 2019-07-01 2021-01-12 한국타이어앤테크놀로지 주식회사 Rubber composition for tire tread and tire manufactured by using the same

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KR20040001728A (en) * 2002-06-28 2004-01-07 금호타이어 주식회사 Tire Sidewall Compound
KR100483963B1 (en) * 2002-07-24 2005-04-18 김향미 The teatcup liner compound with improved antifatigue for milking machine
KR100848644B1 (en) 2007-08-09 2008-07-28 임성규 Environment-friendly rubber for diaphragm
KR102227563B1 (en) * 2019-08-09 2021-03-15 금호타이어 주식회사 Rubber compound for tire sidewall

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930019745A (en) * 1992-03-07 1993-10-18 윤양중 Tire sidewall compounded rubber composition with improved durability

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930019745A (en) * 1992-03-07 1993-10-18 윤양중 Tire sidewall compounded rubber composition with improved durability

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210003337A (en) * 2019-07-01 2021-01-12 한국타이어앤테크놀로지 주식회사 Rubber composition for tire tread and tire manufactured by using the same
KR102203262B1 (en) * 2019-07-01 2021-01-15 한국타이어앤테크놀로지 주식회사 Rubber composition for tire tread and tire manufactured by using the same

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