KR100201164B1 - A rubber composition for tire - Google Patents
A rubber composition for tire Download PDFInfo
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- KR100201164B1 KR100201164B1 KR1019960025357A KR19960025357A KR100201164B1 KR 100201164 B1 KR100201164 B1 KR 100201164B1 KR 1019960025357 A KR1019960025357 A KR 1019960025357A KR 19960025357 A KR19960025357 A KR 19960025357A KR 100201164 B1 KR100201164 B1 KR 100201164B1
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- rubber powder
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- waste tire
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
본 발명은 원 고무와의 혼용성, 접착력을 증진시키기 위해서 폐타이어 고무분말을 알코올에 현탁시킨 다음, 여기에 NaIO4용액을 첨가하고 반응시켜 표면처리한 고무분말 및 이를 함유한 타이어 고무조성물에 관한 것이다.The present invention relates to a rubber powder and a tire rubber composition containing the same by suspending the waste tire rubber powder in alcohol in order to enhance compatibility and adhesion with the original rubber, and then adding and reacting NaIO 4 solution thereto. will be.
Description
본 발명은 화학적으로 표면처리된 폐타이어 고무분말 및 이를 함유하는 타이어용 고무조성물에 관한 것으로서, 보다 상세하게는 고무분말의 표면을 화학약품(NaIO4)으로 처리하여 고무분말의 표면에 존재하는 모노설피드 관능기를 술폰(sulfone)이나 술폭사이드(sulfoxide) 관능기로 산화시키므로써 원 고무와의 화학적인 결합을 가능케하여 원 고무와의 혼용성, 접착력을 증진시키는 화학적으로 표면처리된 폐타이어 고무분말과 이와 같이 표면처리된 고무분말을 고무제품 제조시에 고무제품의 전반적인 성능을 유지 혹은 향상시키면서 그의 첨가량을 증가킬 수 있어 고무제품의 제고 원가를 절감할 수 있는 타이어용 고무조성물에 관한 것이다.The present invention relates to a chemically surface-treated waste tire rubber powder and a rubber composition for a tire containing the same. More specifically, the mono rubber present on the surface of the rubber powder by treating the surface of the rubber powder with a chemical (NaIO 4 ). Chemically surface-treated waste tire rubber powder which oxidizes sulfide functional groups to sulfone or sulfoxide functional groups to enable chemical bonding with the raw rubber, thereby improving compatibility and adhesion with the raw rubber. The surface-treated rubber powder thus relates to a rubber composition for tires that can increase the amount of the rubber product while maintaining or improving the overall performance of the rubber product, thereby reducing the cost of improving the rubber product.
폐타이어를 분쇄하여 제조되는 고무분말은 그 적용 분야가 다양할 뿐만 아니라 제조단가가 낮아 여러 가지 고무 제품의 제조 원가 절감에 기여하고 있다. 그러나, 이 고무분말을 타이어의 제조에 적용하는 경우, 원 고무와의 접착특성 및 혼용성의 감소로 인하여 전반적인 물성의 하락이 초래된다. 따라서, 원 고무와의 배합시 폐타이어 고무분말의 첨가량 및 적용 부위가 크게 제한을 받는다.Rubber powder produced by crushing waste tires is not only diverse in the field of application but also low in manufacturing cost, contributing to the reduction of manufacturing cost of various rubber products. However, when this rubber powder is applied to the production of tires, the reduction of the overall physical properties is caused due to the reduction in the adhesion properties and miscibility with the raw rubber. Therefore, the addition amount and application site of the waste tire rubber powder are greatly limited when blended with the raw rubber.
종래에는 폐타이어 고무분말과 원 고무와의 접착력 및 혼용성을 높이기 위하여 고무분말을 탈황(desulfurization) 시키는 방법 등을 사용하였다. 그러나, 고무 주쇄에 가교되어 있는 황을 제거하는 공정은 단순히 황만 제거되는 것이 아니라 주쇄가 절단되는 등의 부정적인 변화를 초래하기 때문에 그다지 효과를 거두기 못하고 있는 실정이었다.Conventionally, a method of desulfurization of a rubber powder has been used in order to increase adhesion and compatibility between the waste tire rubber powder and the raw rubber. However, the process of removing sulfur crosslinked in the rubber main chain has not been effective because it is not only to remove the sulfur but also causes a negative change such as the main chain is cut.
또한, 고무분말의 표면을 개질하는 방법이 있다. 예로서, 고무분말의 제조과정중에 액상 스티렌-부타디엔 고무를 첨가하여 고무분말 입자를 피복하여 고무분말의 접착력을 높이는 방법은 이미 실용화되어 있으며, 또 다른 방법으로 미생물을 이용하여 고무 표면에 존재하는 황을 산화시키는 방법 등이 알려져 있으나 아직 실용화되지는 못하고 있다.There is also a method of modifying the surface of the rubber powder. For example, during the manufacturing process of the rubber powder, the method of adding liquid styrene-butadiene rubber to coat the rubber powder particles to increase the adhesion of the rubber powder has already been put into practical use. The method of oxidizing is known, but it has not been put to practical use yet.
이에 본 발명에서는 종래의 폐타이어 고무분말의 결점을 개선하기 위하여, 폐타이어 고무분말의 표면을 화학약품(NaIO4)으로 처리하여 고무분말 표면에 술폰 혹은 술폭사이드 관능기를 도입시키므로써 원 고무와의 화학적 결합을 가능케하여 원 고무와의 혼용성 및 접착력을 증진시키는 표면처리된 고무분말을 제공하며, 또한 이와같이 표면처리된 고무분말을 고무 제품제조시 첨가사용하므로써 종래에 비하여 고무제품의 제조 원가를 절감시킬 수 있는 고무조성물을 제공하게 된다.Accordingly, in the present invention, in order to improve the defects of the conventional waste tire rubber powder, by treating the surface of the waste tire rubber powder with a chemical (NaIO 4 ), by introducing a sulfone or sulfoxide functional group on the surface of the rubber powder, Provides a surface-treated rubber powder that enables chemical bonding and enhances the compatibility and adhesion with the raw rubber, and also reduces the manufacturing cost of rubber products by adding and using the surface-treated rubber powder in manufacturing rubber products. It provides a rubber composition that can be made.
본 발명은 폐타이어 고무분말을 알코올에 현탁시킨 다음, 여기에 NaIO4용액을 첨가하고 반응시키므로써 표면처리하여 제조된 폐타이어 고무분말에 관한 것이다.The present invention relates to a waste tire rubber powder prepared by suspending the waste tire rubber powder in alcohol, followed by surface treatment by adding and reacting NaIO 4 solution.
본 발명에 따른 표면처리된 폐타이어 고무분말의 제조공정의 일예를 들면 다음과 같다.An example of the manufacturing process of the surface-treated waste tire rubber powder according to the present invention is as follows.
폐타이어 고무분말의 중량 대 메탄올의 부피의 비율(W/V)이 1:1~1:5인 현탁액을 제조한 다음, 여기에 0.1~0.2 mol의 NaIO4를 물 100ml에 녹인 용액을 서서히 첨가하고 온도를 10~30℃로 유지하면서 20분~1시간 동안 교반하면서 반응시킨 후 고무분말을 여과시켜 물로 세척하고 건조하여 표면처리된 고무분말을 얻는다. NaIO4용액의 제조시에 사용되는 용매는 극성용매이며, 특히, NaIO4는 물에 대한 용해도가 가장 크므로 물이 바람직한 용매이다.Prepare a suspension with a weight ratio of the waste tire rubber powder to the volume of methanol (W / V) of 1: 1 to 1: 5, and then slowly add a solution of 0.1 to 0.2 mol of NaIO 4 in 100 ml of water. After the reaction was stirred for 20 minutes to 1 hour while maintaining the temperature at 10 ~ 30 ℃, the rubber powder was filtered, washed with water and dried to obtain a surface-treated rubber powder. The solvent used in the preparation of the NaIO 4 solution is a polar solvent. In particular, NaIO 4 is the preferred solvent because it has the highest solubility in water.
폐타이어 고무분말의 표면에 존재하는 모노 설피드 관능기는 상기한 표면처리 공정을 통하여 술폰(sulfone)이나 술폭사이드(sulfoxide) 관능기로 산화되며, 이와 같은 고무분말표면의 화학적 변화를 도시하면 다음과 같다.The mono sulfide functional group present on the surface of the waste tire rubber powder is oxidized to a sulfone or sulfoxide functional group through the above-described surface treatment process, and the chemical change of the rubber powder surface is as follows. .
또한, 본 발명은 상기의 표면처리된 폐타이어 고무분말을 10~15phr 함유하는 타이어용 고무조성물에 관한 것이다.The present invention also relates to a rubber composition for tires containing 10 to 15 phr of the surface-treated waste tire rubber powder.
따라서, 본 발명의 표면처리된 폐타이어 고무분말을 타이어 제조에 적용할 경우, 원고무와의 접착성 및 혼용성이 매우 우수하기 때문에 그의 첨가량을 증가시킬 수 있어 타이어의 제조 원가를 절감시킬 수 있다. 본 발명의 표면처리된 폐타이어 고무분말을 고무조성물에 배합시 10~150phr을 첨가 사용하는 것이 바람직하다. 10phr 이하 첨가사용시 물성향상을 기대할 수 없으며, 150phr 이상 첨가사용시 물성향상의 효과가 거의 없거나 오히려 감소하게 된다.Therefore, when the surface-treated waste tire rubber powder of the present invention is applied to tire production, since the adhesiveness and miscibility with the original rubber are very excellent, the amount of its addition can be increased, thereby reducing the production cost of the tire. When the surface-treated waste tire rubber powder of the present invention is blended into the rubber composition, it is preferable to add 10 to 150 phr. When using more than 10phr can not be expected to improve the physical properties, when using more than 150phr the effect of the physical properties is little or rather reduced.
[실시예 1]Example 1
본 실시예는 NaIO4를 사용하여 표면처리한 폐타이어 고무분말의 제조에 관한 것이다.This embodiment relates to the production of waste tire rubber powder surface-treated with NaIO 4 .
폐타이어 고무분말 100g을 메탄올 300ml에 현탁시킨 다음, 여기에 NaIO436.8g(0.175mol)을 물 100ml에 녹인 용액을 30분 동안 서서히 첨가하고, 온도를 20℃로 유지하면서 30분 동안 교반하면서 반응시킨 후 고무분말을 여과시켜 물로 세척하고 건조하여 표면처리된 고무분말을 얻었다.100 g of waste tire rubber powder was suspended in 300 ml of methanol, and then a solution of 36.8 g (0.175 mol) of NaIO 4 in 100 ml of water was slowly added thereto for 30 minutes, followed by stirring for 30 minutes while maintaining the temperature at 20 ° C. After the rubber powder was filtered, washed with water and dried to obtain a rubber powder surface treatment.
[실시예 2]Example 2
상기 실시예 1에서 제조된 표면처리된 고무분말을 함유하는 고무제품의 물성을 측정하기 위하여, 하기 표 1의 조성에 따라 고무시편을 제조하였으며, 그의 물성시험 결과를 하기 표 2에 나타내었다.In order to measure the physical properties of the rubber product containing the surface-treated rubber powder prepared in Example 1, a rubber specimen was prepared according to the composition of Table 1, and the results of the physical properties are shown in Table 2 below.
1) 스티렌-부타디엔고무 : 유화중합 스티렌-부타디엔고무(오일함량 : 37.5PHR)1) Styrene-Butadiene rubber: Emulsion polymerization Styrene-Butadiene rubber (oil content: 37.5PHR)
2) 공정오일 : 방향족 오일2) Process oil: aromatic oil
3) 레진 : 옥틸-페놀 포름알데히드 레진(Octyl-phenol formaldehyde resin)3) Resin: Octyl-phenol formaldehyde resin
상기 표 2에 나타낸 바와 같이, 본 발명의 화학적으로 표면처리된 고무분말을 적용한 시험예 1~2가 표준예에 비하여 인장강도 및 신장율이 매우 우수하며 동적피고파괴 특성도 우수함을 알 수 있었고, 또한 피코마모특성에서도 현저한 개선효과가 있음을 확인하였다.As shown in Table 2, Test Examples 1 and 2 to which the chemically surface-treated rubber powder of the present invention was applied were found to have excellent tensile strength and elongation rate and excellent dynamic fatigue fracture characteristics as compared to the standard examples. It was confirmed that there is a remarkable improvement effect in the picowear characteristics.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960025357A KR100201164B1 (en) | 1996-06-28 | 1996-06-28 | A rubber composition for tire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960025357A KR100201164B1 (en) | 1996-06-28 | 1996-06-28 | A rubber composition for tire |
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| Publication Number | Publication Date |
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| KR980002118A KR980002118A (en) | 1998-03-30 |
| KR100201164B1 true KR100201164B1 (en) | 1999-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019960025357A KR100201164B1 (en) | 1996-06-28 | 1996-06-28 | A rubber composition for tire |
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- 1996-06-28 KR KR1019960025357A patent/KR100201164B1/en not_active IP Right Cessation
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