JPS5815555A - Visbreaker tar-containing asphalt composition - Google Patents
Visbreaker tar-containing asphalt compositionInfo
- Publication number
- JPS5815555A JPS5815555A JP11456681A JP11456681A JPS5815555A JP S5815555 A JPS5815555 A JP S5815555A JP 11456681 A JP11456681 A JP 11456681A JP 11456681 A JP11456681 A JP 11456681A JP S5815555 A JPS5815555 A JP S5815555A
- Authority
- JP
- Japan
- Prior art keywords
- straight
- run vacuum
- oil
- asphalt
- petroleum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 47
- 239000000203 mixture Substances 0.000 title claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000009835 boiling Methods 0.000 claims abstract description 7
- 239000003208 petroleum Substances 0.000 claims abstract description 7
- 238000005292 vacuum distillation Methods 0.000 abstract description 8
- 238000004821 distillation Methods 0.000 abstract description 5
- 238000005504 petroleum refining Methods 0.000 abstract description 3
- 238000004227 thermal cracking Methods 0.000 abstract 2
- 238000005336 cracking Methods 0.000 abstract 1
- 239000003350 kerosene Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 11
- 230000035515 penetration Effects 0.000 description 11
- 238000002156 mixing Methods 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 7
- 239000010779 crude oil Substances 0.000 description 6
- 238000007654 immersion Methods 0.000 description 4
- 238000009472 formulation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005979 thermal decomposition reaction Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- UBOXGVDOUJQMTN-UHFFFAOYSA-N 1,1,2-trichloroethane Chemical compound ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- JLQUFIHWVLZVTJ-UHFFFAOYSA-N carbosulfan Chemical compound CCCCN(CCCC)SN(C)C(=O)OC1=CC=CC2=C1OC(C)(C)C2 JLQUFIHWVLZVTJ-UHFFFAOYSA-N 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
本発明はビスブレーカ−タールをアスファルト組成物の
基材として使用することにより、アスファルトの接着性
および耐水性を改善することを目的としたものである。DETAILED DESCRIPTION OF THE INVENTION The object of the present invention is to improve the adhesion and water resistance of asphalt by using visbreaker tar as a base material for asphalt compositions.
本発明は石油精製工程で製造される直留減圧残油を軽度
に熱分解し、低粘度化された熱分解生成物を常圧蒸留塔
に導き、ナフサ、溶油および軽油を留出させて得られる
常圧塔残清油を、さらに減圧蒸留塔に導入して減圧軽油
を留出させた後に得られる減圧塔残渣油、すなわちビス
ブレーカ−タール（ＶＢＴと略称する）を石油系直留減
圧残油に配合することを特徴とするものである。The present invention slightly thermally decomposes the straight-run vacuum residue produced in the petroleum refining process, and guides the thermal decomposition product whose viscosity has been reduced to an atmospheric distillation column to distill out naphtha, dissolved oil, and light oil. The resulting atmospheric column residual oil is further introduced into a vacuum distillation column to distill vacuum gas oil, and the resulting vacuum column residual oil, ie, visbreaker tar (abbreviated as VBT), is converted into a petroleum-based direct distillation vacuum residue. It is characterized by being blended with oil.
一般にストレートアスファルトは、石油精製工程におい
て減圧蒸留塔の塔底から流出する直留減圧残油が使用さ
れている。しかしこの直留減圧残油は原油種によってそ
の性状が千差万別であり、例えば比重の小さい軽質原油
から得られる直留減圧残油１ｄ針人度が大きく軟がいが
、比重の大きな重質原油から得られる直留減圧残油は針
入度が小さく常温においては堅い。従って単−原油種か
らその″！、マストレードアスフアル・トとして規格に
合格するものが製造出来るとは限らない。 ａｏ−ｔｏ
、 ｔｏ−ｔｏ、 またはｔｏ−１００等の針入度規
格に合格するストレートアスファルト を製造するにあ
たっては、原油種の異なる直留減圧残油を、それぞれの
針入度に応じて適当な割合に調合することが必要になる
。Generally, straight asphalt is made from straight-run vacuum residue that flows out from the bottom of a vacuum distillation column in a petroleum refining process. However, the properties of this straight-run vacuum residue vary greatly depending on the type of crude oil.For example, straight-run vacuum residue 1d obtained from light crude oil with a low specific gravity has a high degree of stiffness and is soft, while heavy crude oil with a high specific gravity Straight-run vacuum residue obtained from crude oil has low penetration and is hard at room temperature. Therefore, it is not always possible to produce products that meet the standards for mass trade asphalt from a single crude oil type.
To produce straight asphalt that passes penetration standards such as , to-to, or to-100, straight-run vacuum residues of different types of crude oil are mixed in appropriate proportions according to their respective penetration levels. It becomes necessary to do so.
本発明においては、ビスブレーカ−のような比較的過酷
度の低い熱分解装置において直留減圧残油を熱処理し、
これを常圧蒸留塔、さらに減圧蒸留塔へと導入すること
により得られる減圧残渣油、いわゆるビスブレーカ−タ
ール（ＶＢＴ ）を直留減圧残油と混合することによっ
て得られるアスファルト組成物は、耐水性および接着性
においてすぐれた特徴を示すことが見出された。In the present invention, straight-run vacuum residual oil is heat-treated in a relatively low-severity pyrolysis device such as a vis breaker,
The asphalt composition obtained by mixing the vacuum residue oil, so-called visbreaker tar (VBT), which is obtained by introducing this into the atmospheric distillation column and then into the vacuum distillation column, with the straight-run vacuum residue oil is water-resistant. It was found that it exhibits excellent properties in terms of strength and adhesion.
本発明において使用されるビスブレーカ−タールは、通
常石油系直留減圧残油をｙｏｏ〜ＳＯＯ″Ｃの温度で熱
分解することにより得られるが、比較的温和々熱分解条
件により得られるビスブレーカ−タールは本発明におけ
るアスファルト組成物の調合基材として適していること
が明らかになった。これに対し、過酷塵の高い熱分解条
件により得られるビスブレーカ−タールは、粘度および
軟化点が高くなり、三塩化エタン可溶分が低下するので
、これを直留減圧残油に配合する場合、規格に合格する
範囲内に配合比率を抑えなければならない。本発明にお
いて、アスファルト組成物の調合基材としてビスブレー
カ−タールを使用する場合、直留減圧残油のビスブレー
キングにおいて、ビスブレーカ−タールの収率が３０係
以上であることが必要であり、好ましくは５０チ以上（
換言すれば、分解ガスと沸点ｒ ｖ ｏ ’ｃ以下の留
出油の合計収率が３０係以下）になる熱分解条件を選ぶ
必要がある。The visbreaker tar used in the present invention is usually obtained by thermally decomposing petroleum straight-run vacuum residue at a temperature of yoo to SOO''C, but the visbreaker tar can be obtained under relatively mild thermal decomposition conditions. -Tar has been found to be suitable as a formulation base for the asphalt composition in the present invention.In contrast, visbreaker tar obtained under severe dust-high pyrolysis conditions has a high viscosity and softening point. As a result, the soluble content of ethane trichloride decreases, so when blending it with straight-run vacuum residue, the blending ratio must be kept within a range that passes the specifications.In the present invention, the blending base of the asphalt composition When using visbreaker tar as a material, it is necessary that the yield of visbreaker tar is 30% or more, preferably 50% or more (
In other words, it is necessary to select thermal decomposition conditions such that the total yield of cracked gas and distillate having a boiling point r v o 'c or less is 30% or less.
ビスブレーカ−タールを配合したアスファルト組成物を
舗装用アスファルトとして使用するとき、通常の直留減
圧残油から製造されたストレートアスファルトと比べて
接着性が改善され、骨材と舗装用アスファルトとの接着
性を評価するアスファルト被膜のハク離試験において優
れた結果を示した。さらにストレートアスファルトの道
路舗装における耐水性を評価する水浸マーシャル試験（
ｇｏ’ｃ、グにｈｒ）を実施した結果、ビスブレーカ−
タールを配合したアスファルト組成物は耐水性に優れ、
通常の直留減圧残油から得られたストレートアスファル
トと比較して、残留安定度が高い結果が得られた。以下
実施例および比較例を示して本発明をさらに具体的に説
明するとともにアスファルト組成物の調合に用いた原料
油の性状を表１に示す。When an asphalt composition containing visbreaker tar is used as paving asphalt, the adhesion is improved compared to straight asphalt made from ordinary straight-run vacuum residue, and the adhesion between aggregate and paving asphalt is improved. It showed excellent results in peeling tests of asphalt coatings to evaluate properties. In addition, water immersion marshal tests to evaluate the water resistance of straight asphalt road pavement (
As a result of implementing the
Asphalt compositions containing tar have excellent water resistance,
Results showed that the residual stability was higher than that of straight asphalt obtained from ordinary straight-run vacuum residue. EXAMPLES The present invention will now be explained in more detail with reference to Examples and Comparative Examples, and Table 1 shows the properties of the raw material oil used for preparing the asphalt composition.
一３＝
実施例／
ザクム系直留減圧残油を温度１１３０℃、滞留時間／
ＯｍＩｎの熱処理条件でビスブレーキングし、沸点５ｔ
ｔｏ℃以下の留出油分を蒸留によって除去し、ビスブレ
ーカ−タールｈａ／（ＶＢＴ−Ｎａ／と略する）を得た
。この性状を表／に示す。ＶＢＴ−Ｎｌｌ ／を２０％
、ガツチサラン直留減圧残油（ＧＳ−ＶＲと略する）ｌ
ｒＯ％の割合で混合し、針入度規格ざ０−１００アスフ
ァルト組成物を製造した。このアスファルトは表コに示
すようＶＣ，ＴＩＳ規格にすべて合格するとともに、薄
膜加熱試験およびフラース脆化点のいずれも優れた結果
を示した。13= Example/ Zakum-based straight-run vacuum residual oil at a temperature of 1130°C and residence time/
Visbreaking under OmIn heat treatment conditions, boiling point 5t
The distillate oil component below .degree. C. was removed by distillation to obtain visbreaker tar ha/(abbreviated as VBT-Na/). This property is shown in Table/. VBT-Nll/20%
, Gatsuchisaran straight-run vacuum residue (abbreviated as GS-VR)
They were mixed at a ratio of rO% to produce an asphalt composition with a penetration rating of 0-100. As shown in Table 1, this asphalt passed all VC and TIS standards, and also showed excellent results in both the thin film heating test and the Fraas embrittlement point.
実施例コ
ザクム系直留減圧残油を、温度ｔｉｔｔｏ℃、滞留時間
１０ｉの熱処理条件でビスブレーキングし、沸点５ｒｔ
ｏ℃以下の留出油分を除去してＶＤＴ−Ｎａ２を得た。Example Kozakum-based straight-run vacuum residual oil was subjected to visbreaking under heat treatment conditions of a temperature of 10 °C and a residence time of 10 i, and the boiling point was 5 rt.
VDT-Na2 was obtained by removing the distillate oil below 0°C.
その性状を表／に示す。Its properties are shown in Table/.
ＶＤＴ−Ｎａ、２を３ｊ％、ガッチサラン直留減圧残油
４−
（ＧＳ−ＶＲ）、＜ｊ％の割合で混合して針入度規格ざ
０−１００のアスファルト組容物を製造したこのアスフ
ァルト組成物は表−に示すようにＪＩｓ規格にすべて合
格するとともに、薄膜加熱試験およびフラース脆化点の
いずれも良好な結果を示した。This asphalt was prepared by mixing 3j% of VDT-Na, 2 and <j% of Gatchisaran straight-run vacuum residue 4- (GS-VR) to produce an asphalt composition with a penetration standard of 0-100. As shown in the table, the composition passed all JIs standards and showed good results in both the thin film heating test and the Fraas embrittlement point.
次に粗骨材と舗装用アスファルトとの接着性を評価する
・・り離試験を行った。すなわち乾燥骨材１００９と上
記調合のアスファルト組成物！；、！；ｆを加熱混合し
た後、被覆骨材をガラス板上にひろげ、Ｉｒ０℃水浴中
に３０ｍｍおよび乙ｏｍｊｎ浸漬する。水中の被覆骨材
を観察し、アスファルト膜の骨材からのハク離部分を百
分率で求めた。これを表２に示す。ビスブレーカ−ター
ルを配合したアスファルト組成物は、比較例／よりもハ
ク離面積が少なく、接着性に優れていることが明らかに
なった。Next, a peel test was conducted to evaluate the adhesion between coarse aggregate and pavement asphalt. That is, dry aggregate 1009 and the asphalt composition of the above formulation! ;、! After heating and mixing f, the coated aggregate is spread on a glass plate and immersed in a 0°C Ir water bath for 30mm and 20mm. The coated aggregate in water was observed, and the peeled portion of the asphalt membrane from the aggregate was determined in percentage. This is shown in Table 2. It was revealed that the asphalt composition containing visbreaker tar had a smaller flaking area than the comparative example and had excellent adhesive properties.
さらにビスブレーカ−タールを配合したアスファルト組
成物の道路舗装における耐水性を評価するため、水浸マ
ーシャル試験を行った。ＶＢＴ−Ｎａ ２を配合したに
０−／ＤＯアスファルト組成物の水浸マーンヤル試験結
果は、残留安定度がＩｒ３．０％であり規格値（７ｊ％
以上）に合格した。Furthermore, in order to evaluate the water resistance of the asphalt composition containing visbreaker tar in road paving, a water immersion Marshall test was conducted. The water immersion test results of the 0-/DO asphalt composition containing VBT-Na 2 showed that the residual stability was 3.0% Ir, which was lower than the standard value (7j%).
or above) passed.
これを表２に示す。This is shown in Table 2.
実施例３
ザクム系直留減圧残油を温度ググ０℃、滞留時間２０
ｍｍの熱処理条件でビスブレーキングし、沸点５ＩＩｏ
℃以下の留出油分を除去することによりＶＢＴ−Ｎα３
を得た。その性状を表／に示す。Example 3 Zakum-based straight-run vacuum residual oil was heated to 0°C and residence time was 20.
Visbreaking under heat treatment conditions of mm, boiling point 5IIo
VBT-Nα3 by removing distillate oil below ℃
I got it. Its properties are shown in Table/.
ＶＤＴ−Ｎα３を３ｊ％、ガッチサラン直留減圧残油（
ＧＳ−ＶＪを３弘チ、アラビアンライト直留減圧残油（
ＡＬ−ＶＪを３１％の割合で混合し針入度規格ざ０−
／ ００のアスファルト組成物を製造した。このアスフ
ァルト組成物は表２に示スようにＪＩＳ規格にすべて合
格するとともに、フラース脆化点においては良好な低温
性能を示し、ハク離試験では後に示す比較例／に比べて
すぐれた接着性を示した。VDT-Nα3 3j%, Gatchi Saran direct run vacuum residue (
GS-VJ 3 hirochi, Arabian Light direct run vacuum residual oil (
Mix AL-VJ at a ratio of 31% and achieve a penetration standard of 0-
/00 asphalt compositions were produced. As shown in Table 2, this asphalt composition passed all JIS standards, showed good low-temperature performance at the Fraas embrittlement point, and exhibited superior adhesion in the flaking test compared to the comparative example shown below. Indicated.
実施例Ｖ
実施例３において使用したＶＢＴ−Ｎα３を５７！；係
、アラビアンライト直留減圧残油（ＡＬ−ＶＲ）を≠２
ｊ％の割合で混合することにより、針入度規格１０−１
００ のアスファルト組成物を製造した。 このアス
ファルト組成物は表２に示すようＫＪＩＳ規格にすべて
合格するとともに、フラース脆化点−／２℃とすぐれた
低温性能を示し、ハク離試験において、比較例／と比べ
てすぐれた接着性を示した。Example V VBT-Nα3 used in Example 3 was 57! ; Arabian Light direct run vacuum residue (AL-VR) ≠2
Penetration standard 10-1 by mixing at a ratio of j%
00 asphalt compositions were produced. As shown in Table 2, this asphalt composition passed all KJIS standards, exhibited excellent low-temperature performance with a Fraas embrittlement point of -2°C, and exhibited superior adhesion in the flaking test compared to the comparative example. Indicated.
比較例／
ガツチサラン直留減圧残油ｆ ４．２ ％およびアラビ
アンライト直留減圧残油／ ３． ｆ ％を混合するこ
とにより、針入度規格１ｒＯ−１００のストレートアス
ファルトを製造した。 この性状を表２に示す。 比較
例／は実施例２〜すにおけるノ・り離試験および、実施
例２における水浸マーシャル試験結果と比べていずれも
劣っており、本発明によるアスファルト組成物が、接着
性および７−
耐水性において明らかに改善されたことを示している。Comparative example / Gatsuchi Saran straight-run vacuum residue f 4.2% and Arabian Light straight-run vacuum residue / 3. Straight asphalt with a penetration standard of 1rO-100 was produced by mixing f%. The properties are shown in Table 2. Comparative Example / is inferior to the results of the peeling test in Examples 2 to 3 and the water immersion Marshall test in Example 2, and the asphalt composition according to the present invention has poor adhesion and water resistance. This shows that there has been a clear improvement.
実施例！
実施例／で使用したＶＢＴ−Ｎα／を７７％、ガツチザ
ラン直留減圧残油ｇ９％の割合で混合して針大度規格乙
Ｏ−ざＯのアスファルト組成物を製造した。 このアス
ファルト組成物は表３ＶＣ示すようにＪＩＳ規格にすべ
て合格するとともに薄膜加熱試験では比較例２と比べて
すぐれた結果を示した。Example! An asphalt composition having a needle size standard O-ZA was prepared by mixing 77% of the VBT-Nα/ used in Example 1 with 9% of Gatsuchizaran straight-run vacuum residual oil. As shown in Table 3VC, this asphalt composition passed all JIS standards and showed superior results in the thin film heating test compared to Comparative Example 2.
実施例６
実施例−で使用したＶＢＴ−Ｎ１１．２を／７％、ガツ
チサラン直留減圧残油を１１３％の割合で混入し、針入
度規格ｔｏ−ｔｏのアスファルト組成物を製造した。
このアスファルト組成物は表３に示すようにＪＩＳ規格
にすべて合格するとともに、ハタ離試験では比較例−と
比べてすぐれた結果を示した。Example 6 VBT-N11.2 used in Example 1 was mixed at a ratio of 7% and Gatsuchisaran straight-run vacuum residue was mixed at a ratio of 113% to produce an asphalt composition with a to-to penetration standard.
As shown in Table 3, this asphalt composition passed all JIS standards, and also showed superior results in the grouping test compared to the comparative example.
８一
実施例７
実施例３で使用したＶＢＴ−ＮａＪをｌｔ％、ガツチサ
ラン直留減圧残油を１１３％、アラビアンライト直留減
圧残油２２％の割合で混合して、針入度規格６０−ざＯ
のアスファルト組成物を製造した。 このアスファルト
組成物は表３に示すようにＪＩＳ規格にすべて合格する
とともにハク離試験では比較例と比べて特にすぐれた結
果を示した。8- Example 7 The VBT-NaJ used in Example 3 was mixed in a proportion of lt%, Gatsuchisaran straight-run vacuum residue 113%, and Arabian Light straight-run vacuum residue 22%, and the penetration standard was 60- The O
An asphalt composition was produced. As shown in Table 3, this asphalt composition passed all JIS standards and also showed particularly excellent results in the flaking test compared to the comparative example.
比較例２
ガッテサラン直留減圧残油９３％およびアラビアンライ
ト直留減圧残油７％を混合することにより、針入度規格
ｔｏ−ｔｏのストレートアスファルトを製造した。この
性状を表３に示す。Comparative Example 2 Straight asphalt with a to-to penetration standard was manufactured by mixing 93% of Gattesaran straight-run vacuum residue and 7% of Arabian Light straight-run vacuum residue. The properties are shown in Table 3.
比較例２のハク離試験結果は、実施例６および実施例７
と比べて明らかに劣っており、直留減圧残油単独で使用
するよりも、直留減圧残油にヒスフレーカ−タールを配
合したアスファルト組成物は明らかに接着性が改善され
ることを示している。The peeling test results of Comparative Example 2 are the same as those of Example 6 and Example 7.
This shows that the asphalt composition containing Hiss flaker tar mixed with straight-run vacuum residue has clearly improved adhesion than when straight-run vacuum residue is used alone. .
表７ アスファルト組成物調合基材の性状性） ＶＢ
Ｔ−−−−ビスブレーカ−タール−１１−
表２ ｇｏ−１００アスファルト組成物の性状□□□
−■−−−ガツチサラン直留瀞Ｕ夕ｖ出表３ ／、
０−ｇ０アスファルト組成物の性状性）ＶＢＴ−−−ビ
スブレーカ−タールＧＳ−ＶＲ−−−ガツチサラン直留
減圧残油ＡＪ、−ＶＲ−−−アラビアンライト直留１曲
モ曳油１３−
３８９−Table 7 Properties of asphalt composition formulation base material) VB
T----Visbreaker tar-11- Table 2 Properties of go-100 asphalt composition □□□
−■−−− Gatsuchisaran Nadodoro U Yuv Table 3 /,
Properties of 0-g0 asphalt composition) VBT --- Visbreaker tar GS-VR --- Gatsuchisaran straight-run vacuum residue AJ, -VR --- Arabian Light straight-run 1-curve oil 13- 389-
Claims (1)
℃以下の留出油分を除去して得られたビスブレーカ−タ
ールを石油系直留減圧残油に配合することを特徴とする
耐水性および接着性を改善したアスファルト組成物。Visbreaking petroleum-based direct run vacuum residual oil to reduce boiling point spo
An asphalt composition with improved water resistance and adhesion, characterized in that visbreaker tar obtained by removing distillate oil components below .degree. C. is blended with petroleum-based straight-run vacuum residue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11456681A JPS5815555A (en) | 1981-07-22 | 1981-07-22 | Visbreaker tar-containing asphalt composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11456681A JPS5815555A (en) | 1981-07-22 | 1981-07-22 | Visbreaker tar-containing asphalt composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5815555A true JPS5815555A (en) | 1983-01-28 |
Family
ID=14641016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11456681A Pending JPS5815555A (en) | 1981-07-22 | 1981-07-22 | Visbreaker tar-containing asphalt composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5815555A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160280919A1 (en) * | 2013-11-14 | 2016-09-29 | Total Marketing Services | Bitumen/polymer composition having improved low-temperature mechanical properties |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5430406A (en) * | 1977-08-10 | 1979-03-06 | Hitachi Ltd | Dc machine with coreless armature |
-
1981
- 1981-07-22 JP JP11456681A patent/JPS5815555A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5430406A (en) * | 1977-08-10 | 1979-03-06 | Hitachi Ltd | Dc machine with coreless armature |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160280919A1 (en) * | 2013-11-14 | 2016-09-29 | Total Marketing Services | Bitumen/polymer composition having improved low-temperature mechanical properties |
| US10377900B2 (en) * | 2013-11-14 | 2019-08-13 | Total Marketing Services | Bitumen/polymer composition having improved low-temperature mechanical properties |
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