JP4397985B2 - Paving material adhesion inhibitor - Google Patents

Description

（式中、Ｒ¹〜Ｒ⁴は同一又は異なる基であって、少なくとも１つは水素であり、それ以外は炭素数１〜４の炭化水素基であり、Ｘ¹〜Ｘ³は同一又は異なる基であって、式（２）
【化８】

の繰り返し単位を１〜５０有する二価の置換基、式（３）
【化９】

の繰り返し単位を１〜５０有する二価の置換基、又は式（２）の繰り返し単位と式（３）の繰り返し単位とを任意の配列で合計２〜５０有する二価の置換基である。）で表されるポリエーテルポリオールを含有することを特徴とする舗装用材料付着防止剤が提供される。
【０００７】
また、本発明によれば、下記の一般式（４）
【化１０】

（式中、Ｒ⁵〜Ｒ¹⁰は同一又は異なる基であって、少なくとも１つは水素であり、それ以外は炭素数１〜４の炭化水素基であり、Ｘ⁴〜Ｘ⁹は同一又は異なる基であって、式（５）
【化１１】

の繰り返し単位を１〜５０有する二価の置換基、式（６）
【化１２】

の繰り返し単位を１〜５０有する二価の置換基、又は式（５）の繰り返し単位と式（６）の繰り返し単位とを任意の配列で合計２〜５０有する二価の置換基である。）で表されるポリエーテルポリオールを含有することを特徴とする舗装用材料付着防止剤が提供される。
【０００８】
【発明の実施の形態】
本発明の付着防止剤は、特定のポリエーテルポリオールを含有する。
【０００９】
前記特定のポリオールエーテルは、前記式（１）又は（４）で表わされるポリエーテルポリオールである。
【００１０】
式(１)中、Ｒ¹〜Ｒ⁴は同一又は異なる基であって、少なくとも１つは水素であり、それ以外は炭素数１〜４の炭化水素基である。前記炭化水素基としては、脂肪族炭化水素基が好ましい。例えばメチル基、エチル基、プロピル基、ブチル基等のアルキル基、又はビニル基、アリル基、ブテニル基等のアルケニル基等が挙げられる。炭素数が４を越えると水に対する溶解性が悪くなり、水溶液としてローラーへ散布することが困難となる。
【００１１】
式（１）中、Ｘ¹〜Ｘ³は同一又は異なる基であって、前記式（２）の繰り返し単位を１〜５０、好ましくは３〜３０有する二価の置換基、前記式（３）の繰り返し単位を１〜５０、好ましくは３〜３０有する二価の置換基、又は式（２）の繰り返し単位と式（３）の繰り返し単位とをブロック重合又はランダム重合等の任意の配列で合計２〜５０、好ましくは３〜３０有する二価の置換基である。繰り返し単位が５０を越えると水に対する溶解性が悪くなり、水溶液としてローラーへ散布することが困難となる。
【００１２】
前記式（１）で表わされるポリエーテルポリオールの平均分子量は、好ましくは３００〜９０００、より好ましくは５００〜５０００の範囲である。
【００１３】
また、式(４)中、Ｒ⁵〜Ｒ¹⁰は同一又は異なる基であって、少なくとも１つは水素であり、それ以外は炭素数１〜４の炭化水素基である。前記炭化水素基としては、脂肪族炭化水素基が好ましい。例えばメチル基、エチル基、プロピル基、ブチル基等のアルキル基、又はビニル基、アリル基、ブテニル基等のアルケニル基等が挙げられる。炭素数が４を越えると水に対する溶解性が悪くなり、水溶液としてローラーへ散布することが困難となる。
【００１４】
式（４）中、Ｘ⁴〜Ｘ⁹は同一又は異なる基であって、前記式（５）の繰り返し単位を１〜５０、好ましくは３〜３０有する二価の置換基、前記式（６）の繰り返し単位を１〜５０、好ましくは３〜３０有する二価の置換基、又は式（５）の繰り返し単位と式（６）の繰り返し単位とをブロック重合又はランダム重合等の任意の配列で合計２〜５０、好ましくは３〜３０有する二価の置換基である。繰り返し単位が５０を越えると水に対する溶解性が悪くなり、水溶液としてローラーへ散布することが困難となる。
【００１５】
前記式（４）で表わされるポリエーテルポリオールの平均分子量は、好ましくは３００〜１００００、より好ましくは５００〜５０００の範囲である。
【００１６】
前記ポリエーテルポリオールとしては、具体的には、下記式（７）で表わされるポリオキシプロピレングリコールのグリセリントリエーテル（平均分子量６００、式中ｌ、ｍ、ｎは同一又は異なる数であってそれぞれ１〜８の数を表わす。）：
【化１３】

下記式（８）で表わされるポリ（オキシプロピレン・オキシエチレン・ブロックポリマー）グリコールのグリセリントリエーテル（平均分子量３０００、式中ｌ、ｍ、ｎは同一又は異なる数であってそれぞれ１〜４９の数を表わし、ｘ、ｙ、ｚは同一又は異なる数であってそれぞれ１〜４９の数を表わし、ｌ＋ｘ、ｍ＋ｙ及びｎ＋ｚの値は同一又は異なる数であってそれぞれ２〜５０である。）：
【化１４】

下記式（９）で表わされるポリ（オキシプロピレン・オキシエチレン・ランダムポリマー）グリコールのグリセリントリエーテル（平均分子量２８００、式中Ｘ¹¹、Ｘ¹²及びＸ¹³は同一又は異なる基であってそれぞれ前記式（２）で表わされる繰り返し単位及び前記式（３）で表わされる繰り返し単位を、ランダムな配列で、合計２〜５０個有する２価の数を表わす。）：
【化１５】

下記式（１０）で表わされるポリ（オキシプロピレン）グリコールのヘキサオールエーテル（平均分子量７７０、式中ｌ、ｍ、ｎ、ｐ、ｑ及びｒは同一又は異なる数であってそれぞれ１〜５の数を表わす。）：
【化１６】

又はこれらの混合物等が挙げられる。
【００１７】
前記ポリエーテルポリオールは、公知の合成方法により合成することができる。また、市販品を入手することも出来る。具体的には例えば、前記式（７）、（９）及び（１０）で表わされるポリエーテルポリオールは、それぞれ三洋化成（株）製「サンニックスGP600」、「サンニックスGP3000」及び「サンニックスS-P700」として市販されている。
【００１８】
本発明の付着防止剤は、前記ポリエーテルポリオールのみから実質的になるものであってもよいが、さらに希釈剤として水、メタノール、エタノール等を含んでもよい。前記希釈剤の含有割合は、希釈剤１００重量部に対して、前記ポリエーテルポリオールが０．５〜１００重量部、好ましくは５〜７０重量部となるような割合であることが好ましい。
【００１９】
本発明の付着防止剤は、離型剤、又は石油系エマルション若しくはシリコーン系エマルション等をさらに含んでもよい。
【００２０】
本発明の付着防止剤は、舗装用材料の付着防止に用いる。ここでいう舗装用材料とは、アスファルト又は樹脂系バインダー等のバインダーを含み、さらに任意に骨材等の他の材料を含むものであって、道路等の舗装に際して使用するものである。本発明の付着防止剤は、具体的には例えば、締め固め用の鉄輪又はタイヤローラー等のローラー、舗装用材料搬送用のダンプトラック、舗装用材料敷きならし用のフイニイッシャー等の、舗装に際して舗装用材料に接触する施工機械、器具等の表面に、刷毛等による塗布又はスプレイ等による散布等により適用することによって、これらの機械等の表面に舗装用材料が付着することを防止することができる。
【００２１】
【発明の効果】
本発明の付着防止剤は、特定のポリエーテルポリオールを含むので、アスファルト又は樹脂系バインダー等のバインダーを含む舗装用材料の、ローラー等の施工機械、器具等への付着を効果的に防止することができ、しかも舗装材料を変質させないので舗装表面の仕上りに対して悪影響を与えず、そのため施工性を改善し、舗装表面の仕上がりを安定にかつ良好にすることができる。
【００２２】
【実施例】
以下に実施例及び比較例を示して本発明をさらに具体的に説明するが、本発明はこれらの実施例に限定されるものではない。
（実施例１〜４及び比較例１〜５）
表１に示す各種ポリエーテルポリオール又は従来より付着防止剤成分として使用されている各種の成分を、水を用いてそれぞれ表２に示す希釈倍率で希釈し、付着防止剤を調製した。
【００２３】
アスファルト舗装要綱（（社）日本道路協会編）に記載されるアスファルト舗装用材料（密粒度アスファルト混合物（１３））を調製し、（社）日本道路協会発行の舗装試験法便覧記載の方法に従って、樹脂バインダーを含む舗装用材料の供試体を得た。この供試体及びローラーとして鉄製のローラコンパクタを用い、前記付着防止剤をはけを用いて50g/m²の割合でローラーの転圧面に塗布しながら、舗装試験法便覧（日本道路協会編）に規定するホイールトラッキング試験の供試体を作製し、その際にローラーの転圧面に付着する舗装用材料の量を目視観察して評価した。なお、転圧時の舗装用材料の温度は１２０〜１４０℃であった。
【００２４】
続いて、ローラコンパクタによる転圧終了後、さらにホイールトラッキング試験用のゴム製走行車輪を用い、前記付着防止剤を同様に適用しながら舗装面を加圧し、車輪の転圧面に付着する舗装用材料の量を目視観察して評価した。なお、走行車輪と接触する時の舗装用材料の温度は、８０〜１００℃であった。
【００２５】
上記の評価結果を表２に示す。実施例１〜４においては、ローラコンパクタ及びゴム製車輪の表面への、樹脂バインダを含む舗装用材料の付着がほとんどみられなかった。比較例１、２及び５は、ローラコンパクタやゴム製車輪への付着は比較的少なかったものの、供試体表面の仕上がりに凹凸ができて不良であった。
【００２６】
また、比較例３、４は、ローラコンパクタやゴム製車輪表面への付着が比較的多く、さらに供試体表面が軽油の浸透により変色し、仕上がりが悪かった。
【表１】

【表２】

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an adhesion preventive agent for preventing adhesion of paving materials such as roads to construction machines and equipment, and more particularly for dump trucks for conveying paving materials, for paving material spreading. Anti-adhesive agent that can prevent paving materials from adhering to wheels, such as finishers, compaction road rollers, tire rollers or vibration rollers, and can finish paving well without adversely affecting paving materials. About.
[0002]
[Prior art]
When paving roads, etc., as a paving material, use a mixture of asphalt or resin binder and aggregate in a heated state, and spread it on the paved surface in the heated state. There are widely used methods of compaction by rolling with various rollers such as rubber rollers such as rubber rollers and tire rollers.
[0003]
In the compaction, generally, a method of first rolling with an iron wheel or the like as an initial rolling pressure and then rolling with a tire roller or the like as a secondary rolling pressure is used. At the time of compaction, the temperature of the paving material is about 130 to 185 ° C. at the initial rolling and about 80 to 150 ° C. at the secondary rolling. For this reason, there is a problem that binder or the like easily adheres to the roller in contact with the pavement surface, and the pavement finish surface is uneven, thereby reducing pavement quality. In particular, resin binders whose use has been increasing rapidly in recent years have strong adhesion to rollers and it is difficult to obtain a good pavement finish. Therefore, in order to prevent the binder from adhering to the roller, the roller surface is generally subjected to rolling while spraying water, kerosene, light oil, heavy oil, cutting oil or a diluted solution of detergent as an anti-adhesive agent. It has been broken.
[0004]
However, these conventional anti-adhesive agents are insufficient in the anti-adhesion effect. In addition, when kerosene, light oil, heavy oil or cutting oil is used for pavement materials containing resinous binders, alterations such as dissolution of binder on the pavement surface, uneven color, and decrease in binder viscosity at the pavement surface part. There is a problem of causing it. Accordingly, there is a need for an anti-adhesive agent that has a high anti-adhesion effect and does not adversely affect the finish of the pavement surface.
[0005]
[Problems to be solved by the invention]
The object of the present invention is to effectively prevent adhesion of paving materials to construction machines such as rollers, equipment, etc., and to provide a good paving surface finish without altering the paving material. Is to provide.
[0006]
[Means for Solving the Problems]
According to the present invention, the following general formula (1)
[Chemical 7]

(In the formula, R ^{1 to} R ⁴ are the same or different groups, at least one is hydrogen, and the others are hydrocarbon groups having 1 to 4 carbon atoms, and X ^{1 to} X ³ are the same or different. A group of formula (2)
[Chemical 8]

A divalent substituent having 1 to 50 repeating units of formula (3)
[Chemical 9]

Or a divalent substituent having a total of 2 to 50 repeating units of the formula (2) and a repeating unit of the formula (3) in an arbitrary sequence. The pavement material adhesion preventive agent characterized by containing the polyether polyol represented by this is provided.
[0007]
According to the present invention, the following general formula (4)
[Chemical Formula 10]

(In the formula, R ^{5 to} R ¹⁰ are the same or different groups, at least one is hydrogen, and the others are hydrocarbon groups having 1 to 4 carbon atoms, and X ^{4 to} X ⁹ are the same or different. A group of formula (5)
Embedded image

A divalent substituent having 1 to 50 repeating units of formula (6)
Embedded image

Or a divalent substituent having a total of 2 to 50 repeating units of the formula (5) and a repeating unit of the formula (6) in an arbitrary sequence. The pavement material adhesion preventive agent characterized by containing the polyether polyol represented by this is provided.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The anti-adhesive agent of the present invention contains a specific polyether polyol.
[0009]
The specific polyol ether is a polyether polyol represented by the formula (1) or (4).
[0010]
In formula (1), R ^{1 to} R ⁴ are the same or different groups, at least one is hydrogen, and the other is a hydrocarbon group having 1 to 4 carbon atoms. The hydrocarbon group is preferably an aliphatic hydrocarbon group. Examples thereof include alkyl groups such as methyl group, ethyl group, propyl group and butyl group, or alkenyl groups such as vinyl group, allyl group and butenyl group. When the number of carbon atoms exceeds 4, the solubility in water becomes poor, and it becomes difficult to spray the solution as an aqueous solution onto a roller.
[0011]
In formula (1), X < ¹ > -X < ³ > is the same or different group, Comprising: The divalent substituent which has 1-50 of the repeating unit of said Formula (2), Preferably 3-30, Said Formula (3) The divalent substituent having 1 to 50, preferably 3 to 30, or the repeating unit of the formula (2) and the repeating unit of the formula (3) are totaled in any sequence such as block polymerization or random polymerization. It is a divalent substituent having 2 to 50, preferably 3 to 30. If the number of repeating units exceeds 50, the solubility in water becomes poor, and it becomes difficult to spray the solution as an aqueous solution onto a roller.
[0012]
The average molecular weight of the polyether polyol represented by the formula (1) is preferably in the range of 300 to 9000, more preferably 500 to 5000.
[0013]
Moreover, in Formula (4), R < ⁵ > -R < ¹⁰ > is the same or different group, Comprising: At least 1 is hydrogen, and others are C1-C4 hydrocarbon groups. The hydrocarbon group is preferably an aliphatic hydrocarbon group. Examples thereof include alkyl groups such as methyl group, ethyl group, propyl group and butyl group, or alkenyl groups such as vinyl group, allyl group and butenyl group. When the number of carbon atoms exceeds 4, the solubility in water becomes poor, and it becomes difficult to spray the solution as an aqueous solution onto a roller.
[0014]
In formula (4), X ^{4 to} X ⁹ are the same or different groups, and are divalent substituents having 1 to 50, preferably 3 to 30, repeating units of formula (5), formula (6) The divalent substituent having 1 to 50, preferably 3 to 30, or the repeating unit of the formula (5) and the repeating unit of the formula (6) are totaled in any sequence such as block polymerization or random polymerization. It is a divalent substituent having 2 to 50, preferably 3 to 30. If the number of repeating units exceeds 50, the solubility in water becomes poor, and it becomes difficult to spray the solution as an aqueous solution onto a roller.
[0015]
The average molecular weight of the polyether polyol represented by the formula (4) is preferably in the range of 300 to 10,000, more preferably 500 to 5,000.
[0016]
Specifically, as the polyether polyol, glycerin triether of polyoxypropylene glycol represented by the following formula (7) (average molecular weight 600, wherein l, m and n are the same or different numbers, each 1 Represents a number of ~ 8):
Embedded image

Glycerol triether of poly (oxypropylene / oxyethylene / block polymer) glycol represented by the following formula (8) (average molecular weight 3000, wherein l, m and n are the same or different numbers, each being a number of 1 to 49 X, y, z are the same or different numbers, each representing a number from 1 to 49, and the values of l + x, m + y and n + z are the same or different numbers, each being 2-50.
Embedded image

Glycerin triether of poly (oxypropylene / oxyethylene / random polymer) glycol represented by the following formula (9) (average molecular weight 2800, wherein X ¹¹ , X ¹² and X ¹³ are the same or different groups, (Represents a divalent number having 2 to 50 total repeating units represented by (2) and a repeating unit represented by formula (3) in a random arrangement):
Embedded image

Hexaol ether of poly (oxypropylene) glycol represented by the following formula (10) (average molecular weight 770, wherein l, m, n, p, q and r are the same or different numbers, each being a number of 1 to 5 Represents :):
Embedded image

Or a mixture thereof or the like can be mentioned.
[0017]
The polyether polyol can be synthesized by a known synthesis method. Commercial products can also be obtained. Specifically, for example, the polyether polyols represented by the above formulas (7), (9) and (10) are “SANNICS GP600”, “SANNICS GP3000” and “SANNICS S” manufactured by Sanyo Chemical Co., Ltd., respectively. -P700 "is commercially available.
[0018]
The adhesion preventing agent of the present invention may consist essentially of the polyether polyol, but may further contain water, methanol, ethanol or the like as a diluent. The content of the diluent is preferably such that the polyether polyol is 0.5 to 100 parts by weight, preferably 5 to 70 parts by weight, with respect to 100 parts by weight of the diluent.
[0019]
The adhesion preventing agent of the present invention may further contain a release agent, a petroleum emulsion, a silicone emulsion, or the like.
[0020]
The adhesion preventing agent of the present invention is used for preventing adhesion of paving materials. The paving material herein includes a binder such as asphalt or a resin-based binder, and optionally further includes other materials such as an aggregate, and is used when paving a road or the like. Specifically, the anti-adhesive agent of the present invention is paved during paving, for example, a roller such as an iron wheel for compaction or a tire roller, a dump truck for conveying paving material, a finisher for paving material paving. By applying to the surface of construction machines, tools, etc. that come into contact with the construction material by applying with a brush or by spraying, etc., it is possible to prevent the paving material from adhering to the surface of these machines. .
[0021]
【The invention's effect】
Since the adhesion preventing agent of the present invention contains a specific polyether polyol, it is possible to effectively prevent the paving material containing a binder such as asphalt or a resin-based binder from adhering to construction machines such as rollers and equipment. In addition, since the pavement material is not altered, it does not adversely affect the finish of the pavement surface, so that the workability can be improved and the finish of the pavement surface can be made stable and good.
[0022]
【Example】
EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to these examples.
(Examples 1-4 and Comparative Examples 1-5)
Various polyether polyols shown in Table 1 or various components conventionally used as anti-adhesive components were diluted with water at respective dilution ratios shown in Table 2 to prepare anti-adhesive agents.
[0023]
Prepare asphalt pavement material (dense-graded asphalt mixture (13)) described in the asphalt pavement outline (edited by the Japan Road Association), according to the method described in the Pavement Test Method Manual published by the Japan Road Association, A specimen of a paving material containing a resin binder was obtained. Using the iron compactor as the specimen and the roller, and applying the anti-adhesive agent to the rolling surface of the roller at a rate of 50 g / m ² using a brush, the Paving Test Method Manual (edited by the Japan Road Association) A specimen for a prescribed wheel tracking test was prepared, and the amount of the paving material adhering to the rolling surface of the roller at that time was visually observed and evaluated. In addition, the temperature of the pavement material at the time of rolling was 120-140 degreeC.
[0024]
Subsequently, after completion of rolling by the roller compactor, a rubber traveling wheel for wheel tracking test is used, and the pavement surface is pressurized while applying the adhesion preventing agent in the same manner, and the pavement material adheres to the rolling surface of the wheel. The amount was evaluated by visual observation. In addition, the temperature of the pavement material when contacting the traveling wheel was 80 to 100 ° C.
[0025]
The evaluation results are shown in Table 2. In Examples 1 to 4, adhesion of the paving material including the resin binder to the surface of the roller compactor and the rubber wheel was hardly observed. In Comparative Examples 1, 2, and 5, although the adhesion to the roller compactor and the rubber wheel was relatively small, the finish on the surface of the test piece was uneven and was defective.
[0026]
In Comparative Examples 3 and 4, adhesion to the roller compactor and the rubber wheel surface was relatively large, and the surface of the specimen was discolored by the penetration of light oil, resulting in poor finish.
[Table 1]

[Table 2]

Claims (2)

The following general formula (1)

(In the formula, R ^{1 to} R ⁴ are the same or different groups, at least one is hydrogen, and the others are hydrocarbon groups having 1 to 4 carbon atoms, and X ^{1 to} X ³ are the same or different. A group of formula (2)

A divalent substituent having 1 to 50 repeating units of formula (3)

Or a divalent substituent having a total of 2 to 50 repeating units of the formula (2) and a repeating unit of the formula (3) in an arbitrary sequence. A pavement material adhesion preventive agent characterized by containing a polyether polyol represented by: The following general formula (4)

(In the formula, R ^{5 to} R ¹⁰ are the same or different groups, at least one is hydrogen, and the others are hydrocarbon groups having 1 to 4 carbon atoms, and X ^{4 to} X ⁹ are the same or different. A group of formula (5)

A divalent substituent having 1 to 50 repeating units of formula (6)

Or a divalent substituent having a total of 2 to 50 repeating units of the formula (5) and a repeating unit of the formula (6) in an arbitrary sequence. A pavement material adhesion preventive agent characterized by containing a polyether polyol represented by: