JP2004277475A - Road-marking paint and road-marking method - Google Patents
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【０００１】
【発明の属する技術分野】
本発明は、特にコンクリートやアスフアルト路面等に種々の道路標示を施すのに用いられる加熱溶融型の道路標示塗料において、溶融時における溶融粘度の調整が要求される用途に用いられる道路標示塗料及び道路標示方法に関するものである。
【０００２】
【従来の技術】
一般に道路標示を描出するのに用いられる加熱溶融型道路用塗料は、石油樹脂等の粘結樹脂に可塑剤、着色剤、充填剤、反射材等が配合されてなるものであって、この塗料を所定温度以上に加熱溶融させ、これを路面等に塗布して一定の厚さの樹脂膜を形成し、常温にて固化させることにより、所望の区画線や文字、停止線等の道路標示が描出できるものである。
【０００３】
通常、加熱溶融型道路用塗料は施工性を向上させるために、施工時における溶融粘度を比較的低い粘度特性とするものが多い。しかし、雨天時における水膜の発生による視認性低下を防止するために、道路標示上面に凸部を設ける場合など特殊な用途に関しては、施工性及び施工直後の流動を抑えることができる溶融粘度に調整された配合の加熱溶融型道路用塗料が用いられる。
【０００４】
例えば特許文献１において、路面におけるライン敷設部位に揺変性を有する熱溶融性材料を、該熱溶融性材料収容した収容槽のライン形成用流出口から流出させて、所定幅のラインＬ１、Ｌ２を形成すると共に、このライン形成時、前記ライン形成用流出口の開口部形成を制御して、前記ラインＬ１、Ｌ２上に突起Ｐ１，Ｐ２を一体に突設するようにした路面ライン敷設方法が開示されている。
【０００５】
【特許文献１】
特開平７−１３８９２１号公報
【０００６】
【発明が解決しようとする課題】
しかしながら、特許文献１においては、熱溶融性材料に揺変性を具備させるにおいて、揺変性付与剤としてコロイダルシリカ、硬化油脂肪酸エステル、金属石鹸、ベントナイト等が挙げられているが、これらの揺変性付与剤は加熱溶融型道路用塗料と馴染みが悪く、これらを配合した熱溶融性材料を用いて溶融粘度を調整するには配合時や溶融時において入念な混練を行う必要があった。
【０００７】
また、上記の如き揺変性付与剤はコストが高く、熱溶融性材料が高価なものとなり、長距離の施工に用いるのは躊躇される場合があった。
【０００８】
本発明は上記の如き問題点に鑑みてなされたものであり、加熱溶融型道路用塗料と馴染みがよく配合され、溶融粘度の調整に比較的コストが抑えられた道路標示塗料及び道路標示方法を提供せんとするものである。
【０００９】
【課題を解決するための手段】
上記課題を解決するため、本発明は以下のような構成としている。すなわち、本発明に係わる道路標示塗料は、粘結樹脂、可塑剤、着色剤、充填剤、反射材等からなる加熱溶融型の道路標示塗料において、平均分子量５００〜１５０００で酸価が１７〜７０の酸化ポリエチレンワックスと、平均分子量５００〜１５０００で酸価が２０〜４０の酸変性ポリエチレンワックスと、環球法軟化点８０〜１１０℃のエチレン−酢酸ビニル共重合物とからなる溶融粘度調整剤を、塗料全体に対し０．１〜１０重量部配合し、１７０℃における溶融粘度を２００００〜１５００００ｃｐｓとなしたことを特徴とするものである。
【００１０】
本発明によれば、溶融粘度調整剤として配合された酸化ポリエチレンワックス、酸変性ポリエチレンワックス及びエチレン−酢酸ビニル共重合物により溶融粘度が調整されるが、前記溶融粘度調整剤は加熱溶融型の道路標示塗料を構成する石油樹脂や可塑剤と馴染みがよく配合が容易であると共に、上述の揺変性付与剤よりもコストが低く、道路標示塗料のコストの上昇を抑えて溶融粘度の調整が可能となる。
【００１１】
また本発明に係わる道路標示塗料は、粘結樹脂、可塑剤、着色剤、充填剤、反射材等からなる加熱溶融型の道路標示塗料において、不飽和カルボン酸やその無水物またはエステルがグラフト結合されず且つケン化価が０．１ｍｇＫＯＨ／ｇ以下である未変性脂肪族炭化水素樹脂、不飽和カルボン酸やその無水物またはエステルがグラフト結合されず且つケン化価が０．０１ｍｇＫＯＨ／ｇ以下である水素添加石油樹脂、又は不飽和カルボン酸やその無水物またはエステルがグラフト結合されずケン化価が０．０１ｍｇＫＯＨ／ｇ以下である部分水素添加石油樹脂の、いずれか少なくとも１つからなる溶融粘度調整剤を、前記加熱溶融型の道路標示塗料に対し８〜２０重量部配合し、１７０℃における溶融粘度を２００００〜１３００００ｃｐｓとなしたことを特徴とするものである。
【００１２】
本発明によれば、溶融粘度調整剤として配合される未変性脂肪族炭化水素樹脂、水素添加石油樹脂又は部分水素添加石油樹脂のいずれか少なくとも１つにより溶融粘度が調整されるが、前記溶融粘度調整剤は加熱溶融型の道路標示塗料を構成する石油樹脂や可塑剤と馴染みがよく配合が容易であると共に、上述の揺変性付与剤よりもコストが低く、道路標示塗料のコストの上昇を抑えて溶融粘度の調整が可能となる。
【００１３】
また前記溶融粘度調整剤は、前記加熱溶融型道路標示塗料に対し８〜１５重量部配合されていれば、道路標示塗料が施工時に溶融される温度において、より適した溶融粘度とすることができ好ましい。
【００１４】
本発明に係わる道路標示方法は、粘結樹脂、可塑剤、着色剤、充填剤、反射材等からなり、コンクリート平板上に１７０℃で溶融させて塗布したときの付着強さが２．０ＭＰａ以上となる加熱溶融型の道路標示塗料を、１５０℃〜２００℃の溶解温度で溶融粘度を２００００〜１５００００ｃｐｓとしつつ排水性舗装上に塗布することを特徴とするものである。
【００１５】
本発明によれば、施工時における１５０℃〜２００℃の溶解温度で溶融粘度を２００００〜１５００００ｃｐｓとしていることで、施工性を維持しつつ空隙の多い排水性舗装上に施工しても、その空隙に道路標示塗料が入り込みにくく、道路標示塗料を効率よく施工できる。また付着強さが２．０ＭＰａとなされていることで、空隙が多く平坦な舗装面より付着面積が小さくなる排水性舗装上に施工しても施工後に剥がれる恐れを小さくできる。
【００１６】
１５０℃〜２００℃の溶解温度で溶融粘度が２００００ｃｐｓを下回ると、粘度の低さにより道路標示塗料が排水性舗装の空隙に入り込むようになり、１５００００ｃｐｓを上回ると施工性が悪化し、施工時においてかすれが生じやすくなる。
【００１７】
また前記加熱溶融型の道路標示塗料は、粘結樹脂、可塑剤、着色剤、充填剤、反射材等からなる加熱溶融型道路標示塗料において、平均分子量５００〜１５０００で酸価が１７〜７０の酸化ポリエチレンワックスと、平均分子量５００〜１５０００で酸価が２０〜４０の酸変性ポリエチレンワックスと、環球法軟化点８０〜１１０℃のエチレン−酢酸ビニル共重合物とからなる溶融粘度調整剤を、塗料全体に対し０．１〜１０重量部配合したものであれば、溶融粘度調整剤として配合された酸化ポリエチレンワックス、酸変性ポリエチレンワックス及びエチレン−酢酸ビニル共重合物からなる溶融粘度調整剤は、道路標示塗料を構成する石油樹脂や可塑剤と馴染みがよく配合が容易であると共に、従来の揺変性付与剤よりもコストが低く、従来より道路標示塗料のコストの上昇を抑えて溶融粘度の調整が可能となる。またエチレン−酢酸ビニル共重合物を配合することにより路面への付着強さを２．０ＭＰａ以上とするのが容易である。
【００１８】
また本発明に係わる道路標示方法は、粘結樹脂、可塑剤、着色剤、充填剤、反射材等からなる加熱溶融型の道路標示塗料において、不飽和カルボン酸やその無水物またはエステルがグラフト結合されず且つケン化価が０．１ｍｇＫＯＨ／ｇ以下である未変性脂肪族炭化水素樹脂、不飽和カルボン酸やその無水物またはエステルがグラフト結合されず且つケン化価が０．０１ｍｇＫＯＨ／ｇ以下である水素添加石油樹脂、又は不飽和カルボン酸やその無水物またはエステルがグラフト結合されずケン化価が０．０１ｍｇＫＯＨ／ｇ以下である部分水素添加石油樹脂の、いずれか少なくとも１つからなる溶融粘度調整剤を前記加熱溶融型道路標示塗料に対し８〜２０重量部配合した道路標示塗料を１５０℃〜２００℃で溶融させ、凸部を設けながら路面に塗布することを特徴とするものである。
【００１９】
本発明によれば、溶融粘度調整剤として配合される未変性脂肪族炭化水素樹脂、水素添加石油樹脂又は部分水素添加石油樹脂のいずれか少なくとも１つが配合されていることで塗料中に二次結合による網目構造が形成されるが、道路標示塗料を溶融して施工する際に、塗布時にせん断力がかかった場合には前記網目構造が崩れて塗布し易く、塗布後は網目構造が回復して溶融又は軟化状態の道路標示塗料の流動が抑えられ、塗布後に凸部の形状が変化するのを防止できる。また溶融粘度調整剤は加熱溶融型の道路標示塗料を構成する石油樹脂や可塑剤と馴染みがよく配合が容易であると共に、上述の揺変性付与剤よりもコストが低く、道路標示塗料のコストの上昇を抑えて凸部の形状の維持が可能となる。
【００２０】
上記溶融粘度調整剤は、添加すると急激に溶融粘度が上昇するものであり、添加量が８重量部を下回ると溶融粘度が高くなりすぎ、施工時においてかすれが生じやすく、また添加量による溶融粘度の変化が急激であることから、８重量部を下回る添加量においては添加量による溶融粘度の調整が困難である。２０重量部を上回ると、石油樹脂の粘度特性が道路標示塗料の溶融粘度に及ぼす影響が大きくなり、溶融粘度が低くなりすぎて形成された凸部が流動しやすくなる。
【００２１】
本発明に用いられる加熱溶融型の道路標示塗料は、従来汎用のもので粘結樹脂、顔料、充填剤、ガラスビーズ、添加剤等既存の成分にて配合されたものを用いてよい。
【００２２】
まず粘結樹脂としては、一般に石油樹脂が使用されるが、生ロジン、マレイン化ロジン、マレイン化ロジンエステル、ポリアミド樹脂、不飽和ポリエステル樹脂、キシレン樹脂等の熱可塑性樹脂が使用されてもよい。粘結樹脂の配合量は１０〜２０重量部が好ましい。この配合量は、１０重量部以下では塗料の流動性、接着性に劣り、２０重量部以上では塗膜の耐汚染性が悪くなることから１０〜２０重量部が好ましい。
【００２３】
また顔料としては、二酸化チタン、亜鉛華、リトポン等の白色顔料、黄鉛、チタンイエロー等の黄色顔料等が使用される。顔料の配合量は１〜１０重量部が好ましい。この配合量は、１重量部以下では着色力、隠蔽力が小さく、１０重量部以上であってもそれ以上効果が上がらずコスト高となるだけであることから１〜１０重量部が好ましい。
【００２４】
更に充填剤としては、炭酸カルシウム、珪砂、寒水砂、タルク等が使用される。充填剤の配合量は４０〜６５重量部が好ましい。この配合量は、４０重量部以下では塗膜の耐汚染性や耐磨耗性に劣り、６５重量部以上では塗膜の接着性の低下、クラック発生が起こることから４０〜６５重量部が好ましい。
【００２５】
更にまた、ガラスビーズは塗膜の夜間視認性のために１５〜３０重量部配合される。このほか添加剤として酸化防止剤や沈降防止剤のワックス、あるいは植物油、植物油変性アルキド樹脂、フタル酸エステル等の可塑剤等が必要に応じて適宜量配合されればよい。
【００２６】
【発明の実施の形態】
本発明の実施の形態について、以下の実施例及び比較例により具体的に説明する。
【００２７】
【第１の実施例】
表１に、本発明に係わる道路標示塗料の実施例及び比較例の配合を示す。
【００２８】
【表１】
溶融粘度調整剤として配合される酸化ポリエチレンワックスは、例えばハイワックス（商品名）であり、不飽和カルボン酸共重合等によりカルボキシル基が含有され、平均分子量５００〜１５０００で酸価が１７〜７０となされたポリエチレンワックスが用いられる。また酸変性ポリエチレンワックスは、例えばユーメックス（商品名）であり、無水マレイン酸変性等によりカルボキシル基が含有され、平均分子量５００〜１５０００で酸価が２０〜４０となされたたポリエチレンワックスが用いられる。またエチレン−酢酸ビニル共重合体は例えばエバフレックス（商品名）であり、環球法軟化点が８０℃〜１１０℃のものが用いられる。尚、環球法軟化点はＪＩＳ Ｋ５６６５に規定される軟化点の測定方法により測定される軟化点温度である。
【００３０】
これら本発明に係わる道路標示塗料の実施例及び比較例について、溶融粘度、排水性舗装上での材料使用量、施工性及び付着強さの検証を行う。
【００３１】
溶融粘度は、ブルックフィールド型回転粘度計を用い、６回転、ずり速度０．２８Ｎにて１７０℃における溶融粘度の測定を行ったものである。
【００３２】
排水性舗装上での材料使用量は、空隙率２０％の排水性舗装上において、加熱溶融型塗料を１７０℃にて溶融させ、施工速度０．８ｋｍ／ｈで厚さ２ｍｍ、幅１５ｃｍに施工した際に使用した材料の重量を測定したものである。
【００３３】
施工性の評価は、上記施工速度にてかすれ等の不具合が生じないかを目視にて確認したものである。
【００３４】
付着強さは、コンクリート平板上に道路標示塗料を１７０℃で塗布し、２３℃で１８時間放置後、オートグラフによりテストスピード５ｍｍ／ｍｉｎで引張試験を行い、剥離までの最大荷重を測定したものである。
【００３５】
これらの評価項目について得られた結果を表２に示す。
【００３６】
【表２】
実施例１〜４においては、施工時における溶融粘度が２００００〜１５００００ｃｐｓとなされていることで、施工性は許容範囲内であり、且つ材料の使用量は排水性舗装の空隙への塗料の入り込みが低減されることで、汎用の加熱溶融型道路標示塗料より材料の使用量は大幅に削減できる。比較例２においては溶融粘度が高すぎて塗布時にかすれが生じており、排水性舗装に対する施工における溶融粘度は１５００００ｃｐｓ以下が好適であることが示されている。
【００３８】
【第２の実施例】
表３に、本発明に係わる道路標示塗料の実施例及び比較例の配合を示す。
【００３９】
【表３】
加熱溶融型道路標示塗料は汎用のものであり、それを構成する炭酸カルシウム、ガラスビーズ、変性石油樹脂等は汎用の加熱溶融型道路標示塗料に用いられるものである。
【００４１】
溶融粘度調整剤として配合される不飽和カルボン酸やその無水物またはエステルがグラフト結合されず且つケン化価が０．１ｍｇＫＯＨ／ｇ以下である未変性脂肪族炭化水素樹脂は、例えばクイントンＲ１００（商品名）である。不飽和カルボン酸やその無水物またはエステルがグラフト結合されず且つケン化価が０．０１ｍｇＫＯＨ／ｇ以下である水素添加石油樹脂は、例えばアイマーブＰ−１００（商品名）である。また不飽和カルボン酸やその無水物またはエステルがグラフト結合されずケン化価が０．０１ｍｇＫＯＨ／ｇ以下である部分水素添加石油樹脂は、例えばアイマーブＳ−１００（商品名）である。
【００４２】
これら本発明に係わる道路標示塗料の実施例及び比較例について、溶融粘度、施工性及び塗布後の凸部形状の検証を行う。
【００４３】
溶融粘度は、ブルックフィールド型回転粘度計を用い、６回転、ずり速度０．２８Ｎにて１７０℃における溶融粘度の測定を行ったものである。
【００４４】
施工性の評価は、施工速度０．８ｋｍ／ｈにてかすれ等の不具合が生じないかを目視にて確認したものである。
【００４５】
塗布後の凸部形状は、道路標示塗料を１７０℃で溶融させて厚さ２．０ｍｍ、幅１５ｃｍに塗布しつつ塗膜上に一体に高さ１０ｍｍの凸部を設けてゆき、塗布後の凸部形状の変化を目視にて確認したものである。
【００４６】
これらの評価項目について得られた結果を表４に示す。
【００４７】
【表４】
実施例５〜８においては、溶融粘度調整剤により施工時における溶融粘度が２００００〜１３００００ｃｐｓとなされ、且つ塗料中に二次結合による網目構造が形成されていることで、施工性は許容範囲内であり、塗料の塗布後において凸部形状の流動はほとんど見られていない。対して比較例３の汎用の加熱溶融型道路標示塗料には凸部形状の流動が見られ、溶融粘度調整剤の配合の効果が顕著に顕れている。比較例４においては溶融粘度が高すぎて塗布時にかすれが生じており、排水性舗装に対する施工における溶融粘度は１３００００ｃｐｓ以下が好適であることが示されている。
【００４９】
また、比較例４及び５と、実施例８及び９との比較において、水素添加石油樹脂及び部分水素添加石油樹脂の添加量による溶融粘度特性は、それらを添加すると急激に溶融粘度が高まり、更に添加量を増してゆくと石油樹脂の溶融粘度特性に依存する部分が大きくなり、溶融粘度は低下してゆくということが顕著に顕わされており、上記溶融粘度２００００〜１３００００ｃｐｓを得るにおいては、溶融粘度調整剤の添加量は８〜２０部程度が好適であることが推定できる。
【００５０】
【発明の効果】
請求項１に記載の本発明に係わる道路標示塗料によれば、溶融粘度調整剤として配合された酸化ポリエチレンワックス、酸変性ポリエチレンワックス及びエチレン−酢酸ビニル共重合物により溶融粘度が調整されるが、前記溶融粘度調整剤は加熱溶融型の道路標示塗料を構成する石油樹脂や可塑剤と馴染みがよく配合が容易であると共に、上述の揺変性付与剤よりもコストが低く、道路標示塗料のコストの上昇を抑えて溶融粘度の調整が可能となる。
【００５１】
また請求項２に記載の本発明に係わる道路標示塗料によれば、溶融粘度調整剤として配合される未変性脂肪族炭化水素樹脂、水素添加石油樹脂又は部分水素添加石油樹脂のいずれか少なくとも１つにより溶融粘度が調整されるが、前記溶融粘度調整剤は加熱溶融型の道路標示塗料を構成する石油樹脂や可塑剤と馴染みがよく配合が容易であると共に、上述の揺変性付与剤よりもコストが低く、道路標示塗料のコストの上昇を抑えて溶融粘度の調整が可能となる。
【００５２】
請求項４に記載の本発明に係わる道路標示方法によれば、施工時における１５０℃〜２００℃の溶解温度で溶融粘度が２００００〜１５００００ｃｐｓとしていることで、施工性を維持しつつ空隙の多い排水性舗装上に施工しても、その空隙に道路標示塗料が入り込みにくく、道路標示塗料を効率よく施工できる。また付着強さが２．０ＭＰａとなされていることで、空隙が多く平坦な舗装面より付着面積が小さくなる排水性舗装上に施工しても施工後に剥がれる恐れを小さくできる。
【００５３】
また請求項６に記載の本発明に係わる道路標示方法本発明によれば、溶融粘度調整剤として配合される未変性脂肪族炭化水素樹脂、水素添加石油樹脂又は部分水素添加石油樹脂のいずれか少なくとも１つが配合されていることで塗料中に二次結合による網目構造が形成されるが、道路標示塗料を溶融して施工する際に、塗布時にせん断力がかかった場合には前記網目構造が崩れて塗布し易く、塗布後は網目構造が回復して溶融又は軟化状態の道路標示塗料の流動が抑えられ、塗布後に凸部の形状が変化するのを防止できる。また溶融粘度調整剤は加熱溶融型の道路標示塗料を構成する石油樹脂や可塑剤と馴染みがよく配合が容易であると共に、上述の揺変性付与剤よりもコストが低く、道路標示塗料のコストの上昇を抑えて凸部の形状の維持が可能となる。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hot-melt type road marking paint particularly used for applying various road markings on concrete or asphalt road surfaces, etc., wherein a road marking paint and a road used for applications requiring adjustment of melt viscosity during melting are required. It is related to the marking method.
[0002]
[Prior art]
Generally, a hot-melt road paint used to draw road markings is a mixture of a binder resin such as a petroleum resin, a plasticizer, a coloring agent, a filler, and a reflective material. Is heated and melted to a predetermined temperature or more, and applied to a road surface or the like to form a resin film having a certain thickness, and solidified at room temperature, so that road markings such as desired division lines, characters, and stop lines can be formed. It can be depicted.
[0003]
Usually, in order to improve workability, many heat-melting road paints have relatively low melt viscosity during construction. However, in order to prevent the visibility from dropping due to the formation of a water film in rainy weather, for special applications such as providing a convex part on the upper surface of the road sign, the melt viscosity should be low enough to suppress workability and flow immediately after construction. A hot-melt type road paint having an adjusted composition is used.
[0004]
For example, in Patent Document 1, a heat-fusible material having thixotropic properties at a line laid portion on a road surface is caused to flow out of a line forming outlet of a storage tank containing the heat-fusible material, and lines L1 and L2 having a predetermined width are formed. A method of laying a road surface line is disclosed in which, when forming the line, the formation of the opening of the line forming outlet is controlled so that the projections P1 and P2 are integrally formed on the lines L1 and L2. Have been.
[0005]
[Patent Document 1]
JP-A-7-138921
[Problems to be solved by the invention]
However, Patent Literature 1 discloses thixotropic properties of the heat-fusible material such as colloidal silica, hardened oil fatty acid ester, metal soap, and bentonite as thixotropic agents. The agent is poorly compatible with the hot-melt road paint, and in order to adjust the melt viscosity by using a hot-melt material containing these materials, it was necessary to perform careful kneading during compounding and melting.
[0007]
In addition, the thixotropic agent as described above is expensive, and the heat-fusible material is expensive, so that it may be hesitant to use it for long-distance construction.
[0008]
The present invention has been made in view of the above-mentioned problems, and is well-mixed with a hot-melt type road paint, and a road-marking paint and a road-marking method which are relatively low in adjusting melt viscosity. It will not be provided.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has the following configuration. That is, the road marking paint according to the present invention is a heat melting type road marking paint comprising a binder resin, a plasticizer, a coloring agent, a filler, a reflector, and the like, and has an average molecular weight of 500 to 15,000 and an acid value of 17 to 70. An acid-modified polyethylene wax having an average molecular weight of 500 to 15,000 and an acid value of 20 to 40, and a melt viscosity modifier consisting of an ethylene-vinyl acetate copolymer having a ring and ball softening point of 80 to 110 ° C, It is characterized in that 0.1 to 10 parts by weight is blended with respect to the whole coating material and the melt viscosity at 170 ° C. is 20,000 to 150,000 cps.
[0010]
According to the present invention, the melt viscosity is adjusted by an oxidized polyethylene wax, an acid-modified polyethylene wax, and an ethylene-vinyl acetate copolymer blended as a melt viscosity adjuster. It is easy to mix with petroleum resins and plasticizers that make up the marking paint, is easy to mix, and has a lower cost than the thixotropic agent described above, making it possible to adjust the melt viscosity by suppressing the increase in the cost of road marking paint. Become.
[0011]
The road marking paint according to the present invention is a heat melting type road marking paint comprising a binder resin, a plasticizer, a colorant, a filler, a reflector, and the like, wherein an unsaturated carboxylic acid or its anhydride or ester is graft-bonded. Unmodified aliphatic hydrocarbon resin having a saponification value of 0.1 mg KOH / g or less, unsaturated carboxylic acid or anhydride or ester thereof is not graft-bonded and has a saponification value of 0.01 mg KOH / g or less. Melt viscosity consisting of at least one of a hydrogenated petroleum resin and a partially hydrogenated petroleum resin in which an unsaturated carboxylic acid or its anhydride or ester is not graft-bonded and has a saponification value of 0.01 mgKOH / g or less. An adjusting agent is blended in an amount of 8 to 20 parts by weight with respect to the heat-melting type road marking paint, and the melt viscosity at 170 ° C. is from 20,000 to 130,000 cp. It is characterized in that no a.
[0012]
According to the present invention, the melt viscosity is adjusted by at least one of an unmodified aliphatic hydrocarbon resin, a hydrogenated petroleum resin, and a partially hydrogenated petroleum resin blended as a melt viscosity modifier. The modifier is familiar with the petroleum resins and plasticizers that compose the heat-melting type road marking paint, is easy to mix, and has a lower cost than the thixotropic agent described above, suppressing the increase in the cost of the road marking paint. Thus, the melt viscosity can be adjusted.
[0013]
In addition, if the melt viscosity modifier is blended in an amount of 8 to 15 parts by weight with respect to the heat melting type road marking paint, a more suitable melt viscosity can be obtained at a temperature at which the road marking paint is melted during construction. preferable.
[0014]
The road marking method according to the present invention comprises a binder resin, a plasticizer, a colorant, a filler, a reflector, and the like, and has an adhesion strength of 2.0 MPa or more when melted and applied at 170 ° C. on a concrete flat plate. The method is characterized in that a hot-melt road marking paint is applied on a drainable pavement at a melting temperature of 150 ° C to 200 ° C and a melt viscosity of 20,000 to 150,000 cps.
[0015]
According to the present invention, by setting the melt viscosity to 20,000 to 150,000 cps at a melting temperature of 150 ° C to 200 ° C during the construction, even when constructed on a drainage pavement with many voids while maintaining the workability, the voids The road marking paint does not easily enter the road, and the road marking paint can be applied efficiently. In addition, since the adhesive strength is set to 2.0 MPa, the risk of peeling after the application can be reduced even when the application is performed on a drainage pavement having many voids and an adhesion area smaller than a flat pavement surface.
[0016]
If the melt viscosity is below 20,000 cps at a melting temperature of 150 ° C. to 200 ° C., the road marking paint will enter the voids of drainage pavement due to the low viscosity, and if it exceeds 150,000 cps, the workability will deteriorate, Blurring is likely to occur.
[0017]
Further, the heat melting type road marking paint is a heat melting type road marking paint composed of a binder resin, a plasticizer, a coloring agent, a filler, a reflector, and the like, and has an average molecular weight of 500 to 15,000 and an acid value of 17 to 70. A melt viscosity modifier consisting of an oxidized polyethylene wax, an acid-modified polyethylene wax having an average molecular weight of 500 to 15,000 and an acid value of 20 to 40, and an ethylene-vinyl acetate copolymer having a ring and ball softening point of 80 to 110 ° C. If it is 0.1 to 10 parts by weight based on the whole, the melt viscosity modifier consisting of the oxidized polyethylene wax, the acid-modified polyethylene wax and the ethylene-vinyl acetate copolymer compounded as the melt viscosity modifier is used for roads. It is familiar with petroleum resins and plasticizers that make up the marking paint, is easy to mix, and has lower costs than conventional thixotropic agents. It is possible to adjust the melt viscosity is suppressed more increase in cost of road markings paint. Further, by blending the ethylene-vinyl acetate copolymer, it is easy to make the adhesion strength to the road surface 2.0 MPa or more.
[0018]
Further, the road marking method according to the present invention is characterized in that, in a heat melting type road marking paint comprising a binder resin, a plasticizer, a colorant, a filler, a reflector and the like, an unsaturated carboxylic acid or its anhydride or ester is graft-bonded. Unmodified aliphatic hydrocarbon resin having a saponification value of 0.1 mg KOH / g or less, unsaturated carboxylic acid or anhydride or ester thereof is not graft-bonded and has a saponification value of 0.01 mg KOH / g or less. Melt viscosity consisting of at least one of a hydrogenated petroleum resin and a partially hydrogenated petroleum resin in which an unsaturated carboxylic acid or its anhydride or ester is not graft-bonded and has a saponification value of 0.01 mgKOH / g or less. The road marking paint obtained by blending the modifier with 8 to 20 parts by weight with respect to the heat melting type road marking paint is melted at 150 ° C. to 200 ° C. to form a convex portion. It is characterized in applying to the road surface.
[0019]
According to the present invention, at least one of an unmodified aliphatic hydrocarbon resin, a hydrogenated petroleum resin, and a partially hydrogenated petroleum resin that is blended as a melt viscosity modifier is blended to form a secondary bond in a paint. Although a network structure is formed, when the road marking paint is melted and applied, when a shear force is applied during application, the network structure is easily broken and applied, and after application, the network structure recovers. The flow of the road marking paint in a molten or softened state is suppressed, and the shape of the convex portion can be prevented from changing after application. In addition, the melt viscosity modifier is easily blended with the petroleum resin and the plasticizer constituting the hot-melt type road marking paint, and is easy to mix.The cost is lower than the thixotropic agent, and the cost of the road marking paint is reduced. The elevation can be suppressed and the shape of the convex portion can be maintained.
[0020]
When the melt viscosity modifier is added, the melt viscosity rises rapidly. When the amount is less than 8 parts by weight, the melt viscosity becomes too high, fainting is likely to occur at the time of construction, and the melt viscosity depends on the amount added. Because of the rapid change of the melt viscosity, it is difficult to adjust the melt viscosity according to the addition amount below 8 parts by weight. If the amount is more than 20 parts by weight, the influence of the viscosity characteristics of the petroleum resin on the melt viscosity of the road marking paint becomes large, and the melt viscosity becomes too low, so that the formed convexities flow easily.
[0021]
The heat-melt type road marking paint used in the present invention may be a conventional general-purpose paint mixed with existing components such as a binder resin, a pigment, a filler, a glass bead, and an additive.
[0022]
First, a petroleum resin is generally used as the binder resin, but a thermoplastic resin such as raw rosin, maleated rosin, maleated rosin ester, polyamide resin, unsaturated polyester resin, and xylene resin may be used. The amount of the binder resin is preferably 10 to 20 parts by weight. When the amount is less than 10 parts by weight, the fluidity and adhesiveness of the paint are inferior. When the amount is more than 20 parts by weight, the stain resistance of the coating film is deteriorated.
[0023]
As the pigment, white pigments such as titanium dioxide, zinc white and lithopone, and yellow pigments such as graphite and titanium yellow are used. The amount of the pigment is preferably 1 to 10 parts by weight. If the amount is less than 1 part by weight, the coloring power and the hiding power are small, and if the amount is more than 10 parts by weight, the effect is not improved any more and the cost is increased, so that 1 to 10 parts by weight is preferable.
[0024]
Further, as a filler, calcium carbonate, silica sand, cold water sand, talc, or the like is used. The amount of the filler is preferably 40 to 65 parts by weight. When the amount is less than 40 parts by weight, the stain resistance and abrasion resistance of the coating film are inferior, and when the amount is more than 65 parts by weight, the adhesion of the coating film is reduced and cracks occur, so that 40 to 65 parts by weight is preferable. .
[0025]
Furthermore, 15 to 30 parts by weight of glass beads is blended for night visibility of the coating film. In addition, an antioxidant or an anti-settling agent wax, or a plasticizer such as a vegetable oil, a vegetable oil-modified alkyd resin, or a phthalate ester may be added in an appropriate amount as needed.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be specifically described with reference to the following examples and comparative examples.
[0027]
[First Embodiment]
Table 1 shows the formulations of Examples and Comparative Examples of the road marking paint according to the present invention.
[0028]
[Table 1]
The oxidized polyethylene wax blended as a melt viscosity modifier is, for example, high wax (trade name), which contains a carboxyl group by unsaturated carboxylic acid copolymerization or the like, has an average molecular weight of 500 to 15,000, and an acid value of 17 to 70. Made polyethylene wax is used. The acid-modified polyethylene wax is, for example, Eumex (trade name), and a polyethylene wax containing a carboxyl group by maleic anhydride modification or the like, having an average molecular weight of 500 to 15,000 and an acid value of 20 to 40 is used. The ethylene-vinyl acetate copolymer is, for example, Evaflex (trade name) having a softening point in the ring and ball method of 80 ° C to 110 ° C. In addition, the ring and ball method softening point is a softening point temperature measured by a method for measuring a softening point specified in JIS K5665.
[0030]
With respect to Examples and Comparative Examples of the road marking paint according to the present invention, the melt viscosity, the amount of material used on drainage pavement, the workability, and the adhesion strength are verified.
[0031]
The melt viscosity is a value obtained by measuring the melt viscosity at 170 ° C. with a Brookfield-type rotational viscometer at 6 rotations and a shear rate of 0.28 N.
[0032]
The amount of material used on the drainage pavement is as follows. On a drainage pavement with a porosity of 20%, the hot-melt type coating material is melted at 170 ° C and applied at a speed of 0.8 km / h to a thickness of 2 mm and a width of 15 cm. The weight of the material used in the measurement was measured.
[0033]
The evaluation of the workability was performed by visually checking whether a problem such as blurring occurred at the above-mentioned construction speed.
[0034]
The adhesion strength was measured by applying a road marking paint on a concrete plate at 170 ° C., leaving it at 23 ° C. for 18 hours, performing a tensile test at a test speed of 5 mm / min with an autograph, and measuring the maximum load until peeling. It is.
[0035]
Table 2 shows the results obtained for these evaluation items.
[0036]
[Table 2]
In Examples 1 to 4, the melt viscosity at the time of construction is set to 20000 to 150,000 cps, the workability is within an allowable range, and the amount of the material used is such that the paint enters the voids of the drainage pavement. With this reduction, the amount of materials used can be significantly reduced compared to general-purpose heat-melting road marking paints. In Comparative Example 2, the melt viscosity was too high to cause blurring at the time of application, and it is shown that the melt viscosity in the construction for drainage pavement is preferably 150,000 cps or less.
[0038]
[Second embodiment]
Table 3 shows the formulations of Examples and Comparative Examples of the road marking paint according to the present invention.
[0039]
[Table 3]
The heat-fusible road marking paint is a general-purpose one, and the calcium carbonate, glass beads, modified petroleum resin, etc. constituting it are used for the general-purpose heat-fusible road marking paint.
[0041]
Unmodified aliphatic hydrocarbon resins to which unsaturated carboxylic acids and their anhydrides or esters incorporated as melt viscosity modifiers are not grafted and whose saponification value is 0.1 mg KOH / g or less are, for example, Quinton R100 (commercially available). Name). A hydrogenated petroleum resin having no unsaturated carboxylic acid or its anhydride or ester graft-bonded and having a saponification value of 0.01 mgKOH / g or less is, for example, Imarv P-100 (trade name). A partially hydrogenated petroleum resin having an unsaturated carboxylic acid or its anhydride or ester which is not graft-bonded and has a saponification value of 0.01 mgKOH / g or less is, for example, Imarbu S-100 (trade name).
[0042]
With respect to Examples and Comparative Examples of the road marking paint according to the present invention, the melt viscosity, workability, and the shape of the convex portion after application are verified.
[0043]
The melt viscosity is a value obtained by measuring the melt viscosity at 170 ° C. with a Brookfield-type rotational viscometer at 6 rotations and a shear rate of 0.28 N.
[0044]
The evaluation of the workability was performed by visually checking whether or not a problem such as blurring occurred at a construction speed of 0.8 km / h.
[0045]
The shape of the convex portion after application is such that the road marking paint is melted at 170 ° C. and the convex portion having a height of 10 mm is integrally provided on the coating film while being applied to a thickness of 2.0 mm and a width of 15 cm. The change in the shape of the convex portion was visually confirmed.
[0046]
Table 4 shows the results obtained for these evaluation items.
[0047]
[Table 4]
In Examples 5 to 8, the melt viscosity at the time of application is set to 20,000 to 130,000 cps by the melt viscosity modifier, and the network structure is formed by secondary bonding in the paint, so that the workability is within an allowable range. There is almost no flow in the shape of a convex after application of the paint. On the other hand, the general-purpose heat-melt road marking paint of Comparative Example 3 shows a flow in the form of a convex portion, and the effect of the blending of the melt viscosity modifier is remarkably exhibited. In Comparative Example 4, the melt viscosity was too high, causing blurring at the time of application, indicating that the melt viscosity in the construction for drainage pavement is preferably 130,000 cps or less.
[0049]
In addition, in comparison between Comparative Examples 4 and 5, and Examples 8 and 9, the melt viscosity characteristics depending on the amount of the hydrogenated petroleum resin and the partially hydrogenated petroleum resin increased rapidly when they were added. As the addition amount increases, the portion that depends on the melt viscosity characteristics of the petroleum resin increases, and it is remarkably revealed that the melt viscosity decreases, and in obtaining the above melt viscosity of 20,000 to 130,000 cps, It can be estimated that the addition amount of the melt viscosity modifier is preferably about 8 to 20 parts.
[0050]
【The invention's effect】
According to the road marking paint according to the present invention according to claim 1, the melt viscosity is adjusted by an oxidized polyethylene wax, an acid-modified polyethylene wax and an ethylene-vinyl acetate copolymer blended as a melt viscosity modifier, The melt viscosity modifier is easily blended with the petroleum resin and the plasticizer constituting the hot-melt type road marking paint, and is easy to mix.The cost is lower than the thixotropic agent, and the cost of the road marking paint is reduced. The melt viscosity can be adjusted while suppressing the rise.
[0051]
According to the road marking paint according to the present invention as set forth in claim 2, at least one of an unmodified aliphatic hydrocarbon resin, a hydrogenated petroleum resin and a partially hydrogenated petroleum resin blended as a melt viscosity modifier. Melt viscosity is adjusted by the above, the melt viscosity modifier is familiar and easy to blend with the petroleum resin and plasticizer constituting the heat melting type road marking paint, and is more cost effective than the thixotropic agent described above. And the melt viscosity can be adjusted while suppressing an increase in the cost of the road marking paint.
[0052]
According to the road marking method according to the present invention as set forth in claim 4, since the melt viscosity is 20,000 to 150,000 cps at a melting temperature of 150 ° C to 200 ° C during construction, drainage with many voids is maintained while maintaining workability. Even if the road marking paint is applied on the pavement, it is difficult for the road marking paint to enter the voids, and the road marking paint can be applied efficiently. In addition, since the adhesive strength is set to 2.0 MPa, the risk of peeling after the application can be reduced even when the application is performed on a drainage pavement having many voids and an adhesion area smaller than a flat pavement surface.
[0053]
According to the road marking method according to the present invention as set forth in claim 6, at least one of an unmodified aliphatic hydrocarbon resin, a hydrogenated petroleum resin and a partially hydrogenated petroleum resin blended as a melt viscosity modifier. When one is blended, a network structure due to secondary bonding is formed in the paint, but when the road marking paint is melted and applied, a shear force is applied at the time of application, and the network structure collapses. It is easy to apply, and after application, the network structure is recovered, the flow of the road marking paint in a molten or softened state is suppressed, and it is possible to prevent the shape of the convex portion from changing after the application. In addition, the melt viscosity modifier is easily blended with the petroleum resin and the plasticizer constituting the hot-melt type road marking paint, and is easy to mix.The cost is lower than the thixotropic agent, and the cost of the road marking paint is reduced. The elevation can be suppressed and the shape of the convex portion can be maintained.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| JP4350963B2 JP4350963B2 (en) | 2009-10-28 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006241905A (en) * | 2005-03-04 | 2006-09-14 | Kajima Corp | Heat conductive material |
| JP2007326993A (en) * | 2006-06-09 | 2007-12-20 | Kictec Inc | Road-marking coating composition |
| KR100943389B1 (en) * | 2009-07-06 | 2010-02-18 | (주)선한엠엔티 | Road marking paint comprising polyester resin and a painting process using the same |
| JP2013173925A (en) * | 2012-01-27 | 2013-09-05 | Kictec Inc | Hot melt coating composition |
| CN104388015A (en) * | 2014-11-06 | 2015-03-04 | 浙江兄弟路标涂料有限公司 | Pavement marking |
| CN108841327A (en) * | 2018-07-20 | 2018-11-20 | 广州鸿绵合成材料有限公司 | A kind of asphalt road roller interleaving agent and preparation method thereof, test method |
| CN112480775A (en) * | 2020-11-18 | 2021-03-12 | 东南大学 | Microwave easy-to-clean modified hot-melt marked line for cement pavement and preparation method thereof |
| CN115109453A (en) * | 2022-06-17 | 2022-09-27 | 广东冠粤路桥有限公司 | Road marking material additive and preparation method thereof |
| CN115467262A (en) * | 2022-09-22 | 2022-12-13 | 何天龙 | Construction method of embedded road marking |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9267038B2 (en) | 2014-01-07 | 2016-02-23 | Honeywell International Inc. | Asphalt binder compositions and methods to make and use same |
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2003
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006241905A (en) * | 2005-03-04 | 2006-09-14 | Kajima Corp | Heat conductive material |
| JP2007326993A (en) * | 2006-06-09 | 2007-12-20 | Kictec Inc | Road-marking coating composition |
| KR100943389B1 (en) * | 2009-07-06 | 2010-02-18 | (주)선한엠엔티 | Road marking paint comprising polyester resin and a painting process using the same |
| JP2013173925A (en) * | 2012-01-27 | 2013-09-05 | Kictec Inc | Hot melt coating composition |
| CN104388015A (en) * | 2014-11-06 | 2015-03-04 | 浙江兄弟路标涂料有限公司 | Pavement marking |
| CN108841327A (en) * | 2018-07-20 | 2018-11-20 | 广州鸿绵合成材料有限公司 | A kind of asphalt road roller interleaving agent and preparation method thereof, test method |
| CN112480775A (en) * | 2020-11-18 | 2021-03-12 | 东南大学 | Microwave easy-to-clean modified hot-melt marked line for cement pavement and preparation method thereof |
| CN112480775B (en) * | 2020-11-18 | 2021-09-28 | 东南大学 | Microwave easy-to-clean modified hot-melt marked line for cement pavement and preparation method thereof |
| CN115109453A (en) * | 2022-06-17 | 2022-09-27 | 广东冠粤路桥有限公司 | Road marking material additive and preparation method thereof |
| CN115467262A (en) * | 2022-09-22 | 2022-12-13 | 何天龙 | Construction method of embedded road marking |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4350963B2 (en) | 2009-10-28 |
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