KR100575557B1 - Rubber composition for cushion gum for hot cure of truck and bus recycling tire - Google Patents
Rubber composition for cushion gum for hot cure of truck and bus recycling tire Download PDFInfo
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- KR100575557B1 KR100575557B1 KR1020040093006A KR20040093006A KR100575557B1 KR 100575557 B1 KR100575557 B1 KR 100575557B1 KR 1020040093006 A KR1020040093006 A KR 1020040093006A KR 20040093006 A KR20040093006 A KR 20040093006A KR 100575557 B1 KR100575557 B1 KR 100575557B1
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
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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
- C08K3/02—Elements
- C08K3/06—Sulfur
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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
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
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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
- C08K5/435—Sulfonamides
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
Abstract
본 발명은 재생타이어 제조시 트래드가 마모된 타이어(Case)에 기 가류된 새로운 트래드 고무를 가황에 의해 접착시키 위하여 사용하는 열 가류용 쿠션 검 고무 조성물을 제공하는 바, 이는 천연고무를 원료고무로 포함하면서 Koresine계 점착제를 사용하고 설펜아미드계 촉진제를 사용함으로써 접착력이 우수하고 고온가류에 적합하며 내구성 또한 향상시킬 수 있어 트럭 버스용 재생 타이어의 열 가류용 쿠션 검 고무로서 유용하다. The present invention provides a cushioning rubber composition for thermal vulcanization, which is used for vulcanizing a new tread rubber pre-cured on a tread worn tire (Case) by vulcanization in the manufacture of regenerated tires, which is a natural rubber as a raw rubber. It is useful as a cushion gum rubber for thermal vulcanization of recycled tires for truck buses because it is excellent in adhesive strength, suitable for high temperature vulcanization, and improved durability by using Koresine-based adhesive and sulfenamide-based accelerator.
Description
본 발명은 트럭/버스용 재생 타이어의 열 가류용 쿠션 검 고무 조성물에 관한 것으로서, 더욱 상세하게는 재생타이어 제조시 트래드가 마모된 타이어(Case)에 미가류된 새로운 트래드 고무를 가황에 의해 접착시키기 위하여 사용하는 열 가류용 쿠션 검 고무 조성물에 관한 것이다. The present invention relates to a cushion gum rubber composition for thermal vulcanization of recycled tires for trucks / buses, and more particularly, to vulcanize new tread rubbers unvulcanized to tread-worn tires (Case) by vulcanization during the production of regenerated tires. The present invention relates to a cushion gum rubber composition for thermal vulcanization.
재생타이어는 트래드가 마모된 타이어에 새로운 트래드 고무를 가황에 의해 밀착시킨 것으로서, 열 가류(hot cure)와 냉간 가류(cold cure)의 두 가지 재생 방식이 있다. 이중 열 가류는 마모된 타이어(케이스)에 미가류된 새로운 트래드 고무를 붙이고 이를 패턴이 조각된 금형 몰드에서 약 130℃이상의 고온의 가류 조건에서 제조하는 방식이며, 냉간 가류는 마모된 타이어에 이미 패턴 형상이 가류되어 완성된 새로운 트래드 고무를 120℃ 이하의 저온 가류 조건에서 제조하는 방식이다. 따라서, 열 가류는 미가류물인 트래드 고무를 가류시키기 위해 고온의 온도를 부여할 수 있는 스팀식 가류기 또는 전기 가류기를 사용하지만, 냉간 가류는 트래 드 고무가 이미 가류되어 있기에 마모된 타이어와 기 가류되어진 트래드와의 접착만이 필요하므로 저온에서 장시간 가류가 가능한 챔버 형태의 가류기를 사용한다. The regenerated tire is a vulcanized contact of a new tread rubber to a tread worn tire, and there are two regeneration methods, hot cure and cold cure. Double thermal vulcanization is a method of attaching new, unvulcanized tread rubber to worn tires (cases) and manufacturing them in a patterned mold mold under high temperature vulcanization conditions of about 130 ° C. The new tread rubber is vulcanized in shape and manufactured under low temperature vulcanization conditions of 120 ° C or lower. Therefore, thermal vulcanization uses steam or electric vulcanizers that can impart a high temperature to vulcanize unvulcanized tread rubber, while cold vulcanization uses worn tires and vulcanizates because the tread rubber is already vulcanized. Since only adhesion to the prepared tread is required, a chamber-type vulcanizer is used that can be vulcanized for a long time at low temperature.
이와 같이 냉간 가류용 쿠션 검은 저온 가류 조건에 적합하게 가류계를 조성해야 하지만, 열 가류용은 고온에서 미가류 상태의 새로운 트래드 고무와 공가류되기 때문에 이에 따른 고온 조건에 적합한 가류계 설정이 필요하다. 또한 재생을 위해 트래드 부위가 버핑(Buffing)된 케이스의 #4 Belt와의 접착력 확보 뿐만 아니라 쿠션 검의 위치가 신생타이어의 언더 트래드와 같기 때문에 이와 유사한 성능을 가질 수 있는 폴리머 선정 및 카본블랙의 선택과 점착제 사용이 필수적이다. As such, the cold vulcanizing cushion should be configured for the low temperature vulcanization condition, but the heat vulcanization is co-cured with the new tread rubber in the unvulcanized state at high temperature, and thus, the setting of the vulcanizer suitable for the high temperature condition is necessary. . In addition, not only does it secure adhesion to the # 4 belt of the case where the tread is buffed for regeneration, but the position of the cushion gum is the same as that of the new tire under the tread. The use of pressure sensitive adhesives is essential.
이에, 본 발명은 재생타이어 열 가류용 쿠션 검 고무 조성에 있어서 케이스와 트래드간의 접착 성능을 확보하기 위해, 천연고무 폴리머 기재에 특정 결정 특성(Colloidal Properties)을 가지는 카본블랙 일정량과 접착력 향상을 위한 점착제 (Tackifier) 및 고온 가류 조건에 필요한 가류계를 가지는 컴파운드를 조성하되, 가류계에 대한 설정은 고온 가류용 컴파운드이기에 고온 가류 조건에 적합한 설펜아미드계 촉진제를 사용한 고무 조성물을 제공하는 데 그 목적이 있다.Accordingly, the present invention is to provide a certain amount of carbon black having a specific crystal properties (Colloidal Properties) on the natural rubber polymer substrate in order to secure the adhesive performance between the case and the tread in the cushion gum rubber composition for regenerated tire thermal vulcanization, pressure-sensitive adhesive for improving adhesion It is an object to provide a rubber composition using a sulfenamide-based accelerator suitable for high temperature vulcanization conditions, because a compound having a tackifier and a vulcanization system necessary for high temperature vulcanization conditions is formed. .
상기와 같은 목적을 달성하기 위한 본 발명의 트럭 버스용 재생 타이어의 열 가류용 쿠션 검 고무 조성물은 천연고무로 이루어진 원료 고무 100중량부, 질소 흡착 비표면적이 100~120mg/g이며 DBP 흡유량이 110~120cc/100g이고 TINT값이 100~120인 카본블랙 35~45중량부, Koresin계 점착제 1~3중량부, 황 2~5중량부 및 설펜아미드계 촉진제 1~2중량부를 포함하는 것임을 그 특징으로 한다.
Cushion gum rubber composition for thermal vulcanization of the recycled tire for truck buses of the present invention for achieving the above object is 100 parts by weight of the raw rubber made of natural rubber, the specific surface area of nitrogen adsorption 100 ~ 120mg / g and DBP oil absorption 110 35 to 45 parts by weight of carbon black having a thickness of ~ 120cc / 100g and a TINT value of 100 to 120, 1 to 3 parts by weight of Koresin pressure sensitive adhesive, 2 to 5 parts by weight of sulfur, and 1 to 2 parts by weight of sulfenamide type accelerator. It is done.
이와같은 본 발명을 더욱 상세하게 설명하면 다음과 같다.The present invention will be described in more detail as follows.
본 발명의 트럭 버스용 재생 타이어의 열 가류용 쿠션 검 고무 조성물에 있어서 원료고무는 천연고무이다. In the cushion gum rubber composition for thermal vulcanization of recycled tires for truck buses of the present invention, the raw material rubber is natural rubber.
본 발명 조성 중 사용되는 카본블랙은 질소흡착 비표면적이 100~120mg/g이며 DBP 흡유량이 110~120cc/100g이고 Tint 값이 100~120인 카본블랙인 바, 이같은 결정 구조를 갖는 카본블랙을 사용하게 되면 가공성 및 발열 측면에서 유리하다. 이같은 구조의 카본블랙의 함량은 원료고무 100중량부에 대해 35~45중량부인 바, 그 함량이 원료고무 100중량부에 대해 35중량부 미만이면 보강성이 떨어지게 되고 45중량부 초과면 발열측면 및 점착성능 등에서 불리한 문제가 있을 수 있다.Carbon black used in the composition of the present invention is a carbon black having a nitrogen adsorption specific surface area of 100 to 120 mg / g, a DBP oil absorption of 110 to 120 cc / 100 g, and a Tint value of 100 to 120, using a carbon black having such a crystal structure. It is advantageous in terms of processability and heat generation. The content of carbon black having such a structure is 35 to 45 parts by weight based on 100 parts by weight of the raw material rubber. If the content is less than 35 parts by weight based on 100 parts by weight of the raw material rubber, the reinforcement is poor. There may be disadvantageous problems in adhesive performance.
한편, Koresin계 점착제는 점착 성능을 확보하기 위해 사용되는 것으로서 그 함량은 원료고무 100중량부에 대해 1~3중량부이다. 만일, 점착제의 함량이 3중량부를 초과하게 되면 점착성능은 향상시킬 수 있으나, 과점착 성능에 의한 가공성 저하 및 적정 사용량 초과에 따른 비용 상승의 문제가 있을 수 있다. 구체적으로 Koresin계 점착제는 p-tert-부틸-페놀 축합 아세틸렌(p-tert-butyl-phenol condensated acetylene product)이다. On the other hand, Koresin-based pressure-sensitive adhesive is used to secure the adhesive performance, the content is 1 to 3 parts by weight based on 100 parts by weight of the raw material rubber. If the content of the pressure-sensitive adhesive exceeds 3 parts by weight, the adhesive performance may be improved, but there may be a problem of a decrease in processability due to the over-adhesive performance and a cost increase due to the excess of an appropriate amount of use. Specifically, the Koresin-based pressure-sensitive adhesive is a p-tert-butyl-phenol condensated acetylene product.
고온 가류를 위해 황을 2~5중량부로 포함하는 바, 이때 황은 그라운드 황과 불용성 황의 혼합물이다. 구체적으로 그라운드 황 1~2중량부와 불용성 황 1~3중량 부로 병용하는 것이 불용성 유황에 의한 반제품의 저장 안정성과 경제성을 확보하는 측면에서 바람직하다. Sulfur is included in an amount of 2 to 5 parts by weight for high temperature vulcanization, where sulfur is a mixture of ground sulfur and insoluble sulfur. Specifically, it is preferable to use 1 to 2 parts by weight of ground sulfur and 1 to 3 parts by weight of insoluble sulfur in terms of securing storage stability and economical efficiency of the semi-finished product by insoluble sulfur.
가류 촉진제로는 설펜아미드계 촉진제를 사용하는 바, 여기서 설펜아미드계 촉진제는 N-t-부틸-2-벤조티아질 설펜아미드를 들 수 있다. 그 함량은 원료고무 100중량부에 대해 1~2중량부인 것이 바람직한 바, 그 함량이 원료고무 100중량부에 대해 1중량부 미만이면 가류 시간이 지연되고 2중량부 초과면 모듈러스의 상승 등으로 인해 점착 성능이 저하될 수 있으며, 가류시간 단축으로 인한 Reversion 발생저하로 물성저하가 우려된다.As the vulcanization accelerator, sulfenamide-based accelerators are used, and sulfenamide-based accelerators include N-t-butyl-2-benzothiazyl sulfenamide. The content is preferably 1 to 2 parts by weight based on 100 parts by weight of the raw material rubber. If the content is less than 1 part by weight based on 100 parts by weight of the raw rubber, the vulcanization time is delayed. Adhesion may be deteriorated and physical properties may be deteriorated due to a decrease in reversion generation due to shortening of vulcanization time.
그밖에, 본 발명의 고무 조성물은 통상의 열 가류용 쿠션 검 고무 조성물에서 첨가되는 산화아연, 스테아린산, 프로세스 오일, 노화방지제 등과 같은 첨가제를 더 포함할 수 있음은 물론이다. In addition, the rubber composition of the present invention may further include additives such as zinc oxide, stearic acid, process oil, anti-aging agent, and the like, which are added in a conventional thermal vulcanizing cushion gum rubber composition.
이하 본 발명을 다음의 실시예와 비교예에 의하여 설명하고자 한다. 그러나, 이것이 본 발명의 기술적 범위를 한정하는 것은 아니다. Hereinafter, the present invention will be described with reference to the following examples and comparative examples. However, this does not limit the technical scope of the present invention.
실시예 및 비교예 1 내지 2Examples and Comparative Examples 1 and 2
다음 표 1과 같은 조성으로 통상의 방법에 따라 트럭 버스용 재생 타이어의 열 가류용 쿠션 검 고무를 제조하였다. Next, a cushion gum rubber for thermal vulcanization of a recycled tire for a truck bus was manufactured according to a conventional method with the composition shown in Table 1 below.
비교예 1은 점착제를 포함하지 않은 경우이며 비교예 2는 촉진제로서 설펜아미드계 대신 티우람계 촉진제를 사용한 경우이다. Comparative Example 1 is a case where no pressure-sensitive adhesive is included, and Comparative Example 2 is a case where a thiuram-based accelerator is used instead of a sulfenamide-based accelerator.
※(1) : 질소 흡착 비표면적이 100~120mg/g이며 DBP 흡유량이 110~120cc/100g이고 TINT값이 100~120인 카본블랙. ※ (1): Carbon black with nitrogen adsorption specific surface area of 100 ~ 120mg / g, DBP oil absorption of 110 ~ 120cc / 100g and TINT value of 100 ~ 120.
(2) : Koresin계 (p-tertiary-Butyl-Phenol condensated Acetylene Product) 점착제.(2): Koresin-based (p-tertiary-Butyl-Phenol condensated Acetylene Product) adhesive.
(3) : Sulfenamide계 (N-t-butyl-2-benzothiazyl Sulfenamide) 촉진제(3) Sulfenamide type (N-t-butyl-2-benzothiazyl Sulfenamide) accelerator
(4) : Thiuram계 (N,N'-tetramethyl thiuram disulfide) 촉진제(4) Thiuram-based (N, N'-tetramethyl thiuram disulfide) accelerator
이와 같은 고무 조성물을 가류 온도 150℃에서 열 가류용 스팀 가류기를 이용하여 11R22.5 규격의 버스용 타이어를 제조하여 실내 내구 평가를 하여 그 결과를 다음 표 2에 나타내었다. The rubber composition was manufactured using a steam vulcanizer for thermal vulcanization at a vulcanization temperature of 150 ° C. to manufacture a tire for a bus of 11R22.5 standard, and the durability of the room was evaluated. The results are shown in Table 2 below.
상기 표 2의 결과로부터, 실시예가 비교예보다 접착력이 우수하고 가류 시간도 고온 가류에 적합하게 설정되었으며, 버스용 타이어 실내내구 결과도 Failure 시간이 비교예 대비 실시예가 약 1.4~1.8배 향상된 결과를 보임을 알 수 있다.From the results of Table 2, the embodiment was set to better adhesion than the comparative example and the vulcanization time is also suitable for high temperature vulcanization, the results of the interior of the tire tire durability of the bus failure time is about 1.4 ~ 1.8 times compared to the comparative example You can see it.
이상에서 상세히 설명한 바와 같이, 본 발명에 따라 천연고무를 원료고무로 포함하면서 Koresin계 점착제를 사용하고 설펜아미드계 촉진제를 사용한 고무 조성물은 접착력이 우수하고 가류시간도 고온 가류에 적합하며 내구성 또한 향상시킬 수 있어 트럭 버스용 재생 타이어의 열 가류용 쿠션 검 고무로서 유용하다. As described in detail above, a rubber composition using Koresin-based pressure-sensitive adhesives and sulfenamide-based accelerators, including natural rubber as a raw material rubber according to the present invention, has excellent adhesion and is suitable for high temperature vulcanization, and also improves durability. It is useful as a cushion gum rubber for thermal vulcanization of recycled tires for truck buses.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040093006A KR100575557B1 (en) | 2004-11-15 | 2004-11-15 | Rubber composition for cushion gum for hot cure of truck and bus recycling tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040093006A KR100575557B1 (en) | 2004-11-15 | 2004-11-15 | Rubber composition for cushion gum for hot cure of truck and bus recycling tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR100575557B1 true KR100575557B1 (en) | 2006-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020040093006A KR100575557B1 (en) | 2004-11-15 | 2004-11-15 | Rubber composition for cushion gum for hot cure of truck and bus recycling tire |
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| KR (1) | KR100575557B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101140835B1 (en) * | 2009-12-22 | 2012-05-03 | 한국타이어 주식회사 | Rubber composition for tire gum strip and tire manufactured by using the same |
| KR101161328B1 (en) * | 2009-12-21 | 2012-07-02 | 한국타이어 주식회사 | Rubber composition for bead filler of tire, rubber for bead filler of tire manufactured by using the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR970070080A (en) * | 1996-04-29 | 1997-11-07 | 남일 | Rubber composition for tire tread |
| JP2000044735A (en) | 1998-07-28 | 2000-02-15 | Bridgestone Corp | Aqueous cement for tire |
| KR20000073785A (en) * | 1999-05-14 | 2000-12-05 | 조충환 | Rubber composition for tread in tires |
| KR20020091942A (en) * | 2001-06-01 | 2002-12-11 | 한국타이어 주식회사 | Adhesive cement composition for tire tread |
-
2004
- 2004-11-15 KR KR1020040093006A patent/KR100575557B1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR970070080A (en) * | 1996-04-29 | 1997-11-07 | 남일 | Rubber composition for tire tread |
| JP2000044735A (en) | 1998-07-28 | 2000-02-15 | Bridgestone Corp | Aqueous cement for tire |
| KR20000073785A (en) * | 1999-05-14 | 2000-12-05 | 조충환 | Rubber composition for tread in tires |
| KR20020091942A (en) * | 2001-06-01 | 2002-12-11 | 한국타이어 주식회사 | Adhesive cement composition for tire tread |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101161328B1 (en) * | 2009-12-21 | 2012-07-02 | 한국타이어 주식회사 | Rubber composition for bead filler of tire, rubber for bead filler of tire manufactured by using the same |
| KR101140835B1 (en) * | 2009-12-22 | 2012-05-03 | 한국타이어 주식회사 | Rubber composition for tire gum strip and tire manufactured by using the same |
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