KR20040058701A - Polymer-modified asphalt composition - Google Patents
Polymer-modified asphalt composition Download PDFInfo
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- KR20040058701A KR20040058701A KR1020020085078A KR20020085078A KR20040058701A KR 20040058701 A KR20040058701 A KR 20040058701A KR 1020020085078 A KR1020020085078 A KR 1020020085078A KR 20020085078 A KR20020085078 A KR 20020085078A KR 20040058701 A KR20040058701 A KR 20040058701A
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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
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
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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
- 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
Abstract
Description
본 발명은 아스팔트(Asphalt), 스타이렌-부타디엔-스타이렌 블럭공중합체Asphalt (Asphalt), styrene-butadiene-styrene block copolymer
(Styrene-Butadiene-Styrene Block Copolymer: SBS), 길소나이트(Gilsonite) 및 유황으로 이루어진 고분자 개질 아스팔트 조성물(Polymer-Modified Asphalt Composition)에 관한 것이다.(Styrene-Butadiene-Styrene Block Copolymer: SBS), Gilsonite (Gilsonite) and sulfur, and a polymer-modified asphalt composition (Polymer-Modified Asphalt Composition).
도로포장에 쓰이는 아스팔트는 온도변화에 따라 그 물성치가 광범위하게 변한다. 즉, 하절기에는 크리프(Creep) 및 럿(Rut) 현상이 발생하고 동절기에는 균열(Cracking) 및 스트리핑(Stripping)현상이 발생한다.Asphalt used for road pavement changes its properties widely with temperature. In other words, creep and rut occur in summer, and cracking and stripping occur in winter.
이러한 문제점은 아스팔트에 특정의 고분자 물질(Polymer)을 첨가함으로써 해결하여 왔다.This problem has been solved by adding a specific polymer to asphalt.
이러한 고분자 물질을 첨가한 아스팔트 조성물을 고분자 개질 아스팔트 조성물이라 한다.Asphalt composition to which such a polymer material is added is called a polymer modified asphalt composition.
고분자 개질 아스팔트 조성물에서 아스팔트와 고분자 물질은 서로 균일하게 혼합되어야 하는데 균일하게 혼합되기 위하여는 아스팔트와 고분자 물질이 서로 상용성(Compatibility)이 좋아야 한다.In the polymer modified asphalt composition, the asphalt and the polymer material should be uniformly mixed with each other. In order to be uniformly mixed, the asphalt and the polymer material should have good compatibility with each other.
상용성이 좋으면 아스팔트와 고분자 물질이 하나의 연속상(One Continuous Phase)을 이루거나 아스팔트와 고분자 물질이 서로서로 균일하게 내부분산(Interdispersed)된 2개의 연속상(Two Interdispersed Continuous Phase)을 이룬다.If the compatibility is good, asphalt and polymer materials form one continuous phase or two interdispersed continuous phases in which asphalt and polymer materials are uniformly interdispersed with each other.
모든 아스팔트와 고분자 물질이 상용성이 좋은 것은 아니므로 상용성이 나쁘면 상분리(Phase Separation)가 일어나서 고분자 개질 아스팔트 조성물의 저장 안정성(Storage Stability)을 해치게 된다.Not all asphalts and polymers have good compatibility, so poor compatibility results in phase separation, which impairs the storage stability of the polymer modified asphalt composition.
고분자 개질 아스팔트 조성물에 첨가되는 고분자 물질로는 폐타이어, 스타이렌-부타디엔 공중합체(Styrene-Butadiene Copolymer: SBR), 스타이렌-이소프렌 공중합체(Styrene-Isoprene Copolymer), 에틸렌-프로필렌 디엔 모노마의 삼원혼성중합체(Terpolymer of Ethylene-Propylene Diene Monomer: EPDM) 및 SBS를 들 수 있다.The polymer materials added to the polymer modified asphalt composition include ternary mixtures of waste tire, styrene-butadiene copolymer (SBR), styrene-isoprene copolymer, and ethylene-propylene diene monoma. Polymers such as Terpolymer of Ethylene-Propylene Diene Monomer (EPDM) and SBS.
이들 고분자 물질과 아스팔트의 상용성은 만족할만 하지 못하므로 고분자 물질을 개질(Modification)하거나, 아스팔트를 개질하거나, 양자 모두 개질하여야 한다.Since the compatibility of these polymer materials and asphalt is not satisfactory, the polymer materials should be modified, asphalt modified, or both.
미합중국특허 제 5,270,361호 및 제 5,501,730호에서는 아스팔트에 폐타이어 분말을 첨가한 후 고가의 셀레늄 가황제로 가황한 고분자 개질 아스팔트 조성물을 개시하였고, 미합중국 특허 제 5,627,225호에서는 술폰화 아스팔트(SulfonatedAsphalt)에 술폰화 스타이렌-부타디엔 공중합체(Sulfonated SBR) 또는 술폰화 스타이렌-이소프렌 공중합체(Sulfonated Styrene-Isoprene Copolymer)를 첨가하고 필요하면 중화제를 첨가한 고분자 개질 아스팔트 조성물을 개시하였다.US Pat. Nos. 5,270,361 and 5,501,730 disclose polymer modified asphalt compositions vulcanized with an expensive selenium vulcanizing agent after adding waste tire powder to asphalt, and US Pat. A polymer modified asphalt composition is disclosed wherein a styrene-butadiene copolymer (Sulfonated SBR) or a sulfonated styrene-isoprene copolymer is added and, if necessary, a neutralizing agent is added.
미합중국특허 제 5,336,705호에서는 고분자 물질로 SBR 대신 SBS를 사용하기도 하였는데, 산화아스팔트에 술폰화 SBS(Sulfonated SBS)와 같은 산기능성 고분자 물질(Acid Functionalized Polymer)을 첨가하고 필요하면 중화제를 첨가한 고분자 개질 아스팔트 조성물을 개시하였고, 대한민국 공개특허 제 1999-79,717호에서는 산기능성 아스팔트(또는 아스팔트)에 술폰화 SBS와 같은 산기능성 고분자 물질을 첨가하고 필요하면 중화제를 첨가한 고분자 개질 아스팔트 조성물을 개시하였는데 이는 위 미합중국특허 제 5,336,705호와 대동소이하다.In U.S. Patent No. 5,336,705, SBS was used instead of SBR as a polymer material, and polymer modified asphalt with an acid functionalized polymer such as sulfonated SBS added to asphalt oxide and, if necessary, neutralizing agent added. Korean Patent Laid-Open Publication No. 1999-79,717 discloses a polymer modified asphalt composition in which an acid functional polymer (such as sulfonated SBS) is added to an acid functional asphalt (or asphalt), and a neutralizing agent is added if necessary. It is almost the same as patent 5,336,705.
그러나, 미합중국특허 제5,336,705호나 대한민국 공개특허 제 1999-79,717호는 산기능성 반응 및 중화반응을 필요로 하므로 공정이 까다롭고 공정제어가 어렵다.However, US Pat. No. 5,336,705 or Korean Laid-Open Patent Publication No. 1999-79,717 require acid functional reactions and neutralization reactions, which makes the process difficult and process control difficult.
대한민국 공개특허 제 2000-61,151호에서는 SBS를 술폰화 하는 대신 SBS에 길소나이트를 첨가함으로써 상용성 향상을 기한 고분자 개질 아스팔트 조성물을 개시하였다.Korean Patent Laid-Open Publication No. 2000-61,151 discloses a polymer-modified asphalt composition for improving compatibility by adding gilsonite to SBS instead of sulfonating SBS.
이로써 대한민국 공개특허 제 2000-61,151호에서는 술폰화와 같은 복잡한 반응을 피하고 길소나이트를 단순 첨가함으로써 공정을 단순화한 장점이 있다.Therefore, the Republic of Korea Patent Publication No. 2000-61,151 has the advantage of simplifying the process by avoiding complex reactions such as sulfonation and simply adding gilsonite.
그러나, 상용성 향상은 만족스럽지 못하여 고분자 개질 아스팔트 조성물의 저장 안정성에 문제점이 있다.However, the improvement of compatibility is not satisfactory and there is a problem in the storage stability of the polymer-modified asphalt composition.
본 발명에서는 아스팔트, SBS 및 길소나이트로 이루어진 조성물에 유황을 첨가함으로써 아스팔트와 SBS의 상용성을 높여 고분자 개질 아스팔트 조성물의 저장안정성을 향상시키고자 한다.In the present invention, by adding sulfur to the composition consisting of asphalt, SBS and Gilsonite to improve the compatibility of asphalt and SBS to improve the storage stability of the polymer-modified asphalt composition.
본 발명은 아스팔트, SBS 및 길소나이트로 이루어진 조성물에 유황을 첨가함을 특징으로 하는, 아스팔트, SBS, 길소나이트 및 유황으로 이루어진 고분자 개질 아스팔트 조성물에 관한 것이다.The present invention relates to a polymer modified asphalt composition consisting of asphalt, SBS, gilsonite and sulfur, characterized in that sulfur is added to the composition consisting of asphalt, SBS and gilsonite.
이 고분자 개질 아스팔트 조성물은 골재의 바인더(Binder)로서 도로포장에 사용한다.This polymer modified asphalt composition is used for road paving as a binder of aggregate.
본 발명에서 사용되는 아스팔트는 석유계 아스팔트로서 ASTM D5 시험법에 의한 펜침입도가 5~200, 바람직하게는 60~100이고, ASTM D92 시험법에 의한 인화점이 230℃ 이상이다.Asphalt used in the present invention is a petroleum-based asphalt pen penetration degree of 5 ~ 200, preferably 60 ~ 100 by the ASTM D5 test method, the flash point of the ASTM D92 test method is 230 ℃ or more.
본 발명에서 사용되는 SBS는 선상(Linear) 또는 방사상(Radial)의 블럭공중합체로서 스타이렌 함량이 20~46중량%, 바람직하게는 22~35중량%이고 중량평균 분자량은 90,000~750,000, 바람직하게는 130,000~250,000이다.SBS used in the present invention is a linear or radial block copolymer having a styrene content of 20 to 46% by weight, preferably 22 to 35% by weight and a weight average molecular weight of 90,000 to 750,000, preferably Is from 130,000 to 250,000.
SBS의 스타이렌 블럭은 높은 인장강도를 제공하고 부타디엔 블럭은 탄성을 제공한다.SBS styrene blocks provide high tensile strength and butadiene blocks provide elasticity.
SBS는 아스팔트에 첨가시 아스팔트의 물성을 개선한다. 즉, 하절기에 발생하는 크리프 및 럿 현상을 감소시키고 동절기에 발생하는 균열 및 스트리핑 현상을감소시킨다.SBS improves the physical properties of asphalt when added to asphalt. In other words, it reduces creep and rut phenomena occurring in summer and reduces cracking and stripping phenomena occurring in winter.
사용량은 아스팔트 100중량부 당 0.5~10중량부, 바람직하게는 1~7중량부이다.The usage-amount is 0.5-10 weight part per 100 weight part of asphalt, Preferably it is 1-7 weight part.
본 발명에서 사용되는 길소나이트는 천연 아스팔트의 일종으로서 아스팔텐(Asphaltene)함량이 50~80중량%, 바람직하게는 60~80중량%이고 말텐(Maltene)함량이 20~50중량%, 바람직하게는 20~35중량%이다.Gilsonite used in the present invention is a kind of natural asphalt, asphaltene content of 50 to 80% by weight, preferably 60 to 80% by weight and maltene content of 20 to 50% by weight, preferably 20 to 35% by weight.
길소나이트는 아스팔트와 SBS의 상용성을 향상시키는데 사용량은 아스팔트 100중량부 당 0.1~5중량부, 바람직하게는 0.5~3.5중량부이다.Gilsonite improves the compatibility between asphalt and SBS, and the amount used is 0.1 to 5 parts by weight, preferably 0.5 to 3.5 parts by weight, per 100 parts by weight of asphalt.
본 발명에서 사용되는 유황은 유리황으로 사용량은 아스팔트 100중량부당 0.01~1중량부, 바람직하게는 0.05~0.7중량부이다.Sulfur used in the present invention is free sulfur, the amount used is 0.01 to 1 parts by weight, preferably 0.05 to 0.7 parts by weight per 100 parts by weight of asphalt.
본 발명의 고분자 개질 아스팔트 조성물의 제조방법에 관하여 상세하게 설명한다.The manufacturing method of the polymer modified asphalt composition of this invention is demonstrated in detail.
본 발명에서는 고전단믹서(High Shear Mixer)로 조성물을 제조하는데 고전단믹서의 회전속도는 전공정을 통하여 1,000~5,000rpm, 바람직하게는 3,500rpm을 유지하고 온도는 전공정을 통하여 150~250℃, 바람직하게는 170~230℃를 유지하며 상압에서 공정이 진행된다.In the present invention, the composition of the high shear mixer (High Shear Mixer) to prepare a composition, the rotational speed of the high shear mixer is maintained at 1,000 ~ 5,000rpm, preferably 3,500rpm through the entire process and the temperature is 150 ~ 250 ℃ through the whole process Preferably, the process is performed at atmospheric pressure while maintaining 170 to 230 ° C.
다음, 본 발명의 제조방법을 차례로 설명한다.Next, the manufacturing method of this invention is demonstrated in order.
먼저 고전단믹서에 아스팔트 100중량부를 투입하고 1,000~5,000rpm, 바람직하게는 3,500rpm의 회전속도로 가열 및 교반하여 150~250℃, 바람직하게는 170~230℃에 도달하면 여기에 길소나이트 0.1~5중량부, 바람직하게는 0.5~3.5중량부를 투입하고 1,000~5,000rpm, 바람직하게는 3,500rpm의 회전속도를 0.1~2시간, 바람직하게는 0.5~1시간동안 온도가 150~250℃, 바람직하게는 170~230℃가 유지되도록 가열교반하여 아스팔트와 길소나이트를 균일하게 혼합하고, 여기에 SBS 0.5~10중량부, 바람직하게는 1~7 중량부를 투입하고 1,000~5,000rpm, 바람직하게는 3,500rpm의 회전속도로 0.1~10시간, 바람직하게는 0.5~3시간동안 온도가 150~250℃, 바람직하게는 170~230℃가 유지되도록 가열교반하여 아스팔트, 길소나이트 및 SBS를 균일하게 혼합하고, 여기에 마지막으로 유황 0.01~1 중량부, 바람직하게는 0.05~0.7 중량부를 투입하고 1,000~5,000rpm, 바람직하게는 3,500rpm의 회전속도로 0.1~10시간, 바람직하게는 0.5~5시간동안 온도가 150~250℃, 바람직하게는 170~230℃가 유지되도록 가열교반하여 아스팔트, 길소나이트, SBS 및 유황이 균일하게 혼합되어 하나의 연속상을 이룬 고분자 개질 아스팔트 조성물을 얻는다.First, 100 parts by weight of asphalt is added to the high shear mixer, and heated and stirred at a rotational speed of 1,000 to 5,000 rpm, preferably 3,500 rpm to reach 150 to 250 ° C., preferably 170 to 230 ° C., and 0.1 to Gilsonite. 5 parts by weight, preferably 0.5 to 3.5 parts by weight and a rotational speed of 1,000 to 5,000 rpm, preferably 3,500 rpm for 0.1 to 2 hours, preferably 0.5 to 1 hour, the temperature is 150 to 250 ℃, preferably The mixture is heated and stirred to maintain 170 ~ 230 ℃ uniformly mixed with asphalt and gilsonite, 0.5 ~ 10 parts by weight, preferably 1 ~ 7 parts by weight of SBS is added to 1,000 ~ 5,000rpm, preferably 3,500rpm At a rotational speed of 0.1 to 10 hours, preferably 0.5 to 3 hours, the temperature is maintained at 150 to 250 ° C., preferably 170 to 230 ° C., followed by heating and stirring to uniformly mix asphalt, gilsonite and SBS, and Lastly from 0.01 to 1 part by weight of sulfur, preferably from 0.05 to 0 .7 parts by weight is added and the temperature is maintained at 150 to 250 ° C., preferably 170 to 230 ° C. for 0.1 to 10 hours, preferably 0.5 to 5 hours, at a rotational speed of 1,000 to 5,000 rpm, preferably 3,500 rpm. Heat stirring to uniformly mix asphalt, gilsonite, SBS and sulfur to obtain a polymer modified asphalt composition in one continuous phase.
고분자 개질 아스팔트 조성물의 저장 안정성은 주로 "표준 링 및 볼 시험법(Standard Ring and Ball Test: ASTM D36)"으로 연화점 편차를 측정하여 판단하는데, 상세하게 설명하면 지름 25㎜, 길이 140㎜인 알루미늄 튜브에 고분자 개질 아스팔트 조성물을 넣어 170℃의 오븐에서 4일간 보관한 후 상ㆍ중ㆍ하의 3개층으로 각각 분리한 다음 상층 및 하층의 연화점을 각각 측정하여 그 편차를 구한다.The storage stability of the polymer modified asphalt composition is mainly determined by measuring the softening point deviation using the "Standard Ring and Ball Test (ASTM D36)", in detail, an aluminum tube having a diameter of 25 mm and a length of 140 mm. Into the polymer modified asphalt composition and stored in an oven at 170 ℃ for 4 days, separated into three layers of upper, middle and lower, respectively, and then measured the softening point of the upper and lower layers, respectively, to determine the deviation.
연화점의 편차가 생기는 것은 상분리가 일어났다는 증거로서 편차가 작을수록 상분리가 작게 일어나서 저장안정성은 높아지게 되는 것이다.Variation in softening point is evidence of phase separation. The smaller the deviation, the smaller the phase separation and the higher the storage stability.
실시예 1Example 1
고전단믹서에 아스팔트 1,000g을 투입하고 3,500rpm의 회전속도로 가열교반하여 190℃에 도달하면, 여기에 길소나이트 10g을 투입하고 3,500rpm의 회전속도로 1시간동안 온도가 190℃가 유지되도록 가열교반하여 아스팔트와 길소나이트를 균일하게 혼합하고, 여기에 SBS 40g을 투입하고 3,500rpm의 회전속도로 30분동안 온도가 190℃가 유지되도록 가열교반하여 아스팔트, 길소나이트 및 SBS를 균일하게 혼합하고, 여기에 유리황 2g을 투입하고 3,500rpm의 회전속도로 3시간동안 온도가 190℃가 유지되도록 가열교반하여 아스팔트, 길소나이트, SBS 및 유황이 균일하게 혼합되어 하나의 연속상을 이룬 고분자 개질 아스팔트 조성물을 얻었다.1,000 g of asphalt was added to the high shear mixer and heated and stirred at a rotational speed of 3,500 rpm to reach 190 ° C. 10 g of gilsonite was added thereto and heated at 190 ° C for 1 hour at a rotational speed of 3,500 rpm. After stirring, the asphalt and gilsonite are uniformly mixed, 40 g of SBS is added thereto, and the mixture is heated and stirred to maintain the temperature at 190 ° C. for 30 minutes at a rotational speed of 3,500 rpm, to uniformly mix the asphalt, gilsonite and SBS, 2 g of free sulfur was added thereto, and the mixture was heated and stirred to maintain a temperature of 190 ° C. for 3 hours at a rotational speed of 3,500 rpm, thereby uniformly mixing asphalt, gilsonite, SBS, and sulfur to form a polymer modified asphalt composition in one continuous phase. Got.
비교예 1Comparative Example 1
고전단믹서에 아스팔트 1,000g을 투입하고 3,500rpm의 회전속도로 가열교반하여 190℃에 도달하면, 여기에 길소나이트 10g을 투입하고 3,500rpm의 회전속도로 1시간동안 온도가 190℃가 유지되도록 가열교반하여 아스팔트와 길소나이트를 균일하게 혼합하고, 여기에 SBS 40g을 투입하고 3,500rpm의 회전속도로 30분동안 온도가 190℃가 유지되도록 가열교반하여 아스팔트, 길소나이트 및 SBS가 균일하게 혼합되어 하나의 연속상을 이룬 고분자 개질 아스팔트 조성물을 얻었다.1,000 g of asphalt was added to the high shear mixer and heated and stirred at a rotational speed of 3,500 rpm to reach 190 ° C. 10 g of gilsonite was added thereto and heated at 190 ° C for 1 hour at a rotational speed of 3,500 rpm. By mixing the asphalt and gilsonite uniformly, 40g of SBS is added thereto, and the mixture is heated and stirred so that the temperature is maintained at 190 ° C. for 30 minutes at a rotational speed of 3,500rpm. The polymer modified asphalt composition which formed the continuous phase of was obtained.
ASTM D36 시험법(표준 링 및 볼 시험법)에 의하여 유황을 첨가한 본 발명의 실시예 1 및 유황을 첨가하지 아니한 종래기술인 비교예 1의 연화점 편차를 측정하여 보면 실시예 1의 연화점 편차는 0.6℃이고 비교예 1의 연화점 편차는 4.2℃이었다.According to the ASTM D36 test method (standard ring and ball test method), the softening point deviation of Example 1 of the present invention with the addition of sulfur and Comparative Example 1 without the addition of sulfur was measured. The softening point deviation of Comparative Example 1 was 4.2 ° C.
이상 살펴본 바와 같이 종래의 아스팔트, SBS 및 길소나이트로 이루어진 고분자 개질 아스팔트 조성물의 연화점 편차가 4.2℃인데 비하여 본 발명의 아스팔트, SBS, 길소나이트 및 유황으로 이루어진 고분자 개질 아스팔트 조성물의 연화점 편차는 0.6℃로 유황을 첨가한 본 발명의 실시예 1이 유황을 첨가하지 아니한 종래발명인 비교예 1보다 월등한 저장 안정성을 보였다.As described above, the softening point deviation of the polymer-modified asphalt composition of the conventional asphalt, SBS, and gilsonite is 4.2 ° C, whereas the softening point deviation of the polymer-modified asphalt composition of the asphalt, SBS, Gilsonite, and sulfur of the present invention is 0.6 ° C. Example 1 of the present invention in which sulfur was added showed superior storage stability than Comparative Example 1, which is a conventional invention without adding sulfur.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100711270B1 (en) * | 2005-11-07 | 2007-04-25 | 금호석유화학 주식회사 | Asphalt compositions containing styrene-butadiene-styrene block copolymes |
| WO2007123382A1 (en) * | 2006-04-26 | 2007-11-01 | Sk Energy Co., Ltd. | Asphalt composition having improved mechanical property and anti-aging property and method of preparing the same |
| CN100363462C (en) * | 2005-12-16 | 2008-01-23 | 中国石油天然气股份有限公司 | Process for preparing SBS modified asphalt |
| CN102093728A (en) * | 2010-12-31 | 2011-06-15 | 山西省交通科学研究院 | High-viscosity modified asphalt |
-
2002
- 2002-12-27 KR KR1020020085078A patent/KR20040058701A/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100711270B1 (en) * | 2005-11-07 | 2007-04-25 | 금호석유화학 주식회사 | Asphalt compositions containing styrene-butadiene-styrene block copolymes |
| CN100363462C (en) * | 2005-12-16 | 2008-01-23 | 中国石油天然气股份有限公司 | Process for preparing SBS modified asphalt |
| WO2007123382A1 (en) * | 2006-04-26 | 2007-11-01 | Sk Energy Co., Ltd. | Asphalt composition having improved mechanical property and anti-aging property and method of preparing the same |
| CN102093728A (en) * | 2010-12-31 | 2011-06-15 | 山西省交通科学研究院 | High-viscosity modified asphalt |
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