JP3548791B2 - Heat melting type road marking paint - Google Patents
Heat melting type road marking paint Download PDFInfo
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- JP3548791B2 JP3548791B2 JP23383493A JP23383493A JP3548791B2 JP 3548791 B2 JP3548791 B2 JP 3548791B2 JP 23383493 A JP23383493 A JP 23383493A JP 23383493 A JP23383493 A JP 23383493A JP 3548791 B2 JP3548791 B2 JP 3548791B2
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- coating film
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Description
【0001】
【産業上の利用分野】
本発明はコンクリートやアスファルト路面等に種々の道路標示をするのに使用される加熱溶融型道路標示塗料に関するものである。
【0002】
【従来の技術】
従来、加熱溶融型道路標示塗料は、石油樹脂等の粘結樹脂に顔料、充填剤、ガラスビーズ等が配合されてなり、施工に際して路面等との接着性を向上させるためにプライマーを介して路面等に塗布されている。又、プライマーとして、トルエン、キシレン、アセトン、酢酸エチル等の有機溶剤に石油樹脂、アルキド樹脂、エチレン−酢酸ビニル共重合樹脂、生ロジン、マレイン化ロジン等の粘結樹脂が溶解されたものが使用されている。
【0003】
【発明が解決しようとする課題】
しかしながら、かかる従来の加熱溶融型道路標示塗料は、施工に際してプライマーを塗布した後、プライマーの溶剤を完全に揮発させてから施工する必要がある。すなわち、プライマーの溶剤が残っていると、道路標示塗料を塗布してもその塗膜が経時的に軟化、汚染、剥離しやすいことから、溶剤を完全に揮発させなければならない。このために、プライマーの塗布、乾燥に非常に時間がかかり、施工時の交通規制により交通に支障をきたすと共に、プライマーの使用により施工に手間がかかり、コスト高となる問題点がある。
【0004】
本発明はかかる従来の問題点を解消したプライマーを必要としない加熱溶融型道路標示塗料を提供することを目的としている。
【0005】
【課題を解決するための手段】
上記課題を解決するため、本発明者は種々研究の結果、従来汎用の加熱溶融型道路標示塗料に非晶性ポリアルファオレフィン樹脂を所定量配合することにより、塗料全体の路面等に対する接着性を向上させ、プライマーが不必要なことを見い出したものである。
【0006】
すなわち、本発明加熱溶融型道路標示塗料は、粘結樹脂、顔料、充填剤等からなる加熱溶融型道路標示塗料において、非晶性ポリアルファオレフィン樹脂が粘結樹脂100重量部に対して3〜50重量部配合されてなるものである。
【0007】
本発明に配合される非晶性ポリアルファオレフィン樹脂は、プロピレンとエチレン又はブレン−1を共重合した比較的分子量の低い樹脂である。この非晶性ポリアルファオレフィン樹脂は、単独でホットメルト接着剤やシーリング剤として利用できるものであり、粘結樹脂とくに石油樹脂との接着性、相溶性に優れていることから、分子間の結合力を高めて塗料と路面との密着性を高めることができるものである。又、非晶性ポリアルファオレフィン樹脂の内でも、とくに軟化点(環状法軟化点)が110〜129℃と低く、溶融粘度が8000〜8500CPS/190℃と高く、凝集力が高いものが好ましい。
【0008】
上記非晶性ポリアルファオレフィン樹脂の配合量は、粘結樹脂100重量部に対して3〜50重量部配合されているのが好ましい。この配合量は、3重量部以下では塗膜の路面等に対する接着性を向上させることができず、50重量部以上では塗膜硬度の低下により耐汚染性が低下すると共に、塗料粘度の上昇により施工性も低下することから粘結樹脂100重量部に対して3〜50重量部が好ましい。
【0009】
本発明に配合される他の成分は、従来汎用の加熱溶融型道路標示塗料に使用されている粘結樹脂、顔料、充填剤、ガラスビーズ、添加剤等既存の成分であればよい。
【0010】
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。
【0011】
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。
【0012】
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。
【0013】
又、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。
【0014】
【実施例】
以下、本発明の実施例について述べる。
粘結樹脂(石油樹脂)15重量部、顔料(酸化チタン)3重量部、充填剤(炭酸カルシウム)64重量部、ガラスビーズ16重量部、可塑剤(鉱油)2重量部からなる塗料に、非晶性ポリアルファオレフィン樹脂(宇部レキセン社製、ウベタックUT2585)をそれぞれ0.8重量部配合したもの(実施例1)、1.2重量部配合したもの(実施例2)、2.0重量部配合したもの(実施例3)、配合しないもの(比較例1)、8.0重量部配合したもの(比較例2)の各種塗料を用い、プライマーを塗布することなく、これら塗料をそれぞれ溶融塗布して塗膜を形成し、塗膜の耐衝撃性、耐汚染性を調べると共に、塗布時の作業性について判断し、その結果を表1に示した。又、実施例1〜3、比較例1〜2の配合量(重量部)を表1にそれぞれ上記試験結果と合わせて示した。
【0015】
上記耐衝撃性については、上記各種塗料を溶融して直接アルミニウム板(厚み2mm)の表面に塗布(塗布面積60mm×70mm)して厚み約1.5mmの塗膜を形成し、常温で24時間放置後、デュポン式衝撃試験機により50gの重りを30cmの高さからアルミニウム板裏面に落下させて塗膜の剥離の有無を調べた。塗膜が剥離しない場合には〇、剥離する場合には×で示した。
【0016】
耐汚染性については、上記と同様にしてアルミニウム板に塗膜を形成し、JIS K 5665に規定するタイヤ付着性試験用ロールタイヤをロールタイヤの質量以外の外力がかからないようにして塗膜上を転がし、その時の塗膜の着色状態を調べた。塗膜が着色(黒色)しないか又は着色がわずかな場合には〇、着色が著しい場合には×で示した。
【0017】
塗布時の作業性については、溶融式施工機により各種塗料を溶融して路面に直接190℃の温度で塗布し、厚み約1.5mmの塗膜を形成し、その時の塗料の流れ具合や、塗膜表面のすじ等の発生や縁部のまくれ上がり等の仕上がり状態に異常がないかを調べた。塗料の流れ具合がよく、塗膜に異常がない場合には〇、塗料の流れ具合が悪かったり、塗膜に異常が発生する場合には×で示した。
【0018】
なお、上記非晶性ポリアルファオレフィン樹脂(宇部レキセン社製、ウベタックUT2585)は、溶融粘度8500CPS/190℃、針入度40dmm、環球法軟化点129℃等の物性を有するものである。
【0019】
【表1】
【0020】
又、コンクリートやアスファルト路面との接着性を調べるために、上記各種塗料(実施例1〜3、比較例1〜2)をプライマーを塗布しないで路面に直接190℃の温度で塗布し、厚み約1.5mmの塗膜を形成し、塗膜上に2cm角のアタッチメントを接着剤を介して貼着し、島津製作所製オートグラフDSS−5000試験機により引張試験を行い、その結果(引張強度kgf/cm2)を表2に示した。なお、比較例1と同様の配合で予め路面にプライマーを塗布した場合(比較例3)についても上記と同様の試験結果を表2に合わせて示した。
【0021】
【表2】
【0022】
【発明の効果】
以上詳述した如く、本発明加熱溶融型道路標示塗料は、非晶性ポリアルファオレフィン樹脂が粘結樹脂100重量部に対して3〜50重量部配合されているので、粘接着性を塗料に付加することができ、路面等にプライマーを塗布しなくても接着性を確保できる。従って、施工に際して、従来のプライマー塗布、乾燥工程を省くことができ、施工性を向上させることができると共に、コスト安とすることができる。[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-melt road marking paint used for marking various roads on concrete or asphalt road surfaces.
[0002]
[Prior art]
Conventionally, heat melting type road marking paints are prepared by blending pigments, fillers, glass beads, etc. with a binder resin such as a petroleum resin, and apply a primer to the road surface through a primer to improve adhesion to the road surface at the time of construction. Etc. are applied. Further, as the primer, one obtained by dissolving a binder resin such as petroleum resin, alkyd resin, ethylene-vinyl acetate copolymer resin, raw rosin, maleated rosin in an organic solvent such as toluene, xylene, acetone or ethyl acetate is used. Have been.
[0003]
[Problems to be solved by the invention]
However, it is necessary to apply such a conventional hot-melt road marking paint after applying the primer at the time of application and then completely volatilizing the solvent of the primer. That is, if the solvent of the primer remains, even if the road marking paint is applied, the coating tends to soften, stain, and peel off with time, so that the solvent must be completely volatilized. For this reason, it takes a very long time to apply and dry the primer, which hinders traffic due to traffic regulation at the time of construction. In addition, there is a problem that the use of the primer takes a lot of time for the construction and increases the cost.
[0004]
An object of the present invention is to provide a hot-melt road marking paint that does not require a primer and solves the conventional problems.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present inventor has conducted various studies and found that by adding a predetermined amount of amorphous polyalphaolefin resin to a conventional general-purpose hot-melt type road marking paint, the adhesion of the entire paint to a road surface or the like was improved. Improved and found that primers were unnecessary.
[0006]
That is, the hot-melt road marking paint of the present invention is a hot-melt road marking paint composed of a binder resin, a pigment, a filler, and the like. 50 parts by weight are blended.
[0007]
The amorphous polyalphaolefin resin blended in the present invention is a resin having a relatively low molecular weight obtained by copolymerizing propylene and ethylene or brene-1. This amorphous polyalphaolefin resin can be used alone as a hot-melt adhesive or sealing agent.Because it has excellent adhesiveness and compatibility with binder resins, especially petroleum resins, bonding between molecules By increasing the force, the adhesion between the paint and the road surface can be increased. Further, among the amorphous polyalphaolefin resins, those having a particularly low softening point (cyclic softening point) of 110 to 129 ° C, a high melt viscosity of 8000 to 8500 CPS / 190 ° C, and a high cohesive force are preferred.
[0008]
The amount of the amorphous polyalphaolefin resin is preferably 3 to 50 parts by weight based on 100 parts by weight of the binder resin. When the amount is less than 3 parts by weight, the adhesion of the coating film to the road surface cannot be improved, and when the amount is more than 50 parts by weight, the coating film hardness decreases, the stain resistance decreases, and the coating viscosity increases. From 3 to 50 parts by weight per 100 parts by weight of the binder resin is preferable because the workability is also reduced.
[0009]
Other components to be blended in the present invention may be existing components such as a binder resin, a pigment, a filler, a glass bead, and an additive conventionally used in general-purpose heat-melting road marking paints.
[0010]
Petroleum resins are generally used as the binder resin, but thermoplastic resins such as raw rosin, maleated rosin, maleated rosin esters, polyamide resins, unsaturated polyester resins, and xylene resins 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.
[0011]
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.
[0012]
As the filler, calcium carbonate, silica sand, cold water sand, talc and the like are 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. .
[0013]
Glass beads are blended in an amount of 15 to 30 parts by weight for night visibility of the coating film. In addition, waxes as antioxidants and anti-settling agents, or plasticizers such as vegetable oils, vegetable oil-modified alkyd resins, phthalic esters, and the like may be appropriately added as needed.
[0014]
【Example】
Hereinafter, examples of the present invention will be described.
A paint comprising 15 parts by weight of a binder resin (petroleum resin), 3 parts by weight of a pigment (titanium oxide), 64 parts by weight of a filler (calcium carbonate), 16 parts by weight of glass beads, and 2 parts by weight of a plasticizer (mineral oil) is used. 0.8 parts by weight of crystalline polyalphaolefin resin (Ube Tack UT2585, manufactured by Ube Lexen Co.) (Example 1), 1.2 parts by weight (Example 2), 2.0 parts by weight Using various kinds of paints which were blended (Example 3), not blended (Comparative Example 1), and blended 8.0 parts by weight (Comparative Example 2), these paints were each melt-coated without applying a primer. Then, the coating film was formed, the impact resistance and the stain resistance of the coating film were examined, and the workability during coating was judged. The results are shown in Table 1. Table 1 shows the amounts (parts by weight) of Examples 1 to 3 and Comparative Examples 1 and 2 together with the above test results.
[0015]
Regarding the impact resistance, the above various paints are melted and applied directly to the surface of an aluminum plate (thickness 2 mm) (application area 60 mm × 70 mm) to form a coating film having a thickness of about 1.5 mm. After the standing, a 50 g weight was dropped from a height of 30 cm onto the back surface of the aluminum plate using a DuPont impact tester to check for peeling of the coating film. When the coating film was not peeled off, it was indicated by Δ, and when it was peeled off, it was indicated by x.
[0016]
Regarding the stain resistance, a coating film is formed on an aluminum plate in the same manner as described above, and a roll tire for a tire adhesion test specified in JIS K 5665 is applied on the coating film so that no external force other than the mass of the roll tire is applied. It was rolled, and the coloring state of the coating film at that time was examined. When the coating film was not colored (black) or was slightly colored, it was indicated by 〇.
[0017]
Regarding workability at the time of application, various paints are melted by a melting type construction machine and applied directly to the road surface at a temperature of 190 ° C. to form a coating film having a thickness of about 1.5 mm, and the flow condition of the paint at that time, It was examined whether there was any abnormality in the finished state such as generation of streaks on the coating film surface and curling up of the edge. When the flow of the paint was good and there was no abnormality in the coating film, it was indicated by 〇, and when the flow of the paint was poor or the coating film was abnormal, it was indicated by x.
[0018]
The amorphous polyalphaolefin resin (Ube Tack UT2585, manufactured by Ube Lexen Co., Ltd.) has physical properties such as a melt viscosity of 8500 CPS / 190 ° C., a penetration of 40 dmm, and a softening point of the ring and ball method of 129 ° C.
[0019]
[Table 1]
[0020]
In addition, in order to check the adhesiveness with concrete or asphalt road surfaces, the above various paints (Examples 1 to 3 and Comparative Examples 1 and 2) were applied directly to the road surface without applying a primer at a temperature of 190 ° C. A coating film of 1.5 mm was formed, a 2 cm square attachment was stuck on the coating film via an adhesive, and a tensile test was performed with an Autograph DSS-5000 tester manufactured by Shimadzu Corporation. The result (tensile strength kgf / Cm 2 ) are shown in Table 2. In addition, when the primer was previously applied to the road surface in the same formulation as in Comparative Example 1 (Comparative Example 3), the test results similar to those described above are also shown in Table 2.
[0021]
[Table 2]
[0022]
【The invention's effect】
As described above in detail, the heat-melt road marking paint of the present invention has an amorphous polyalphaolefin resin in an amount of 3 to 50 parts by weight based on 100 parts by weight of the binder resin. The adhesiveness can be ensured without applying a primer on a road surface or the like. Therefore, at the time of construction, the conventional primer application and drying steps can be omitted, the workability can be improved, and the cost can be reduced.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP23383493A JP3548791B2 (en) | 1993-09-20 | 1993-09-20 | Heat melting type road marking paint |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP23383493A JP3548791B2 (en) | 1993-09-20 | 1993-09-20 | Heat melting type road marking paint |
Publications (2)
Publication Number | Publication Date |
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JPH0790199A JPH0790199A (en) | 1995-04-04 |
JP3548791B2 true JP3548791B2 (en) | 2004-07-28 |
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JP23383493A Expired - Fee Related JP3548791B2 (en) | 1993-09-20 | 1993-09-20 | Heat melting type road marking paint |
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Families Citing this family (3)
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JP4981296B2 (en) * | 2005-10-11 | 2012-07-18 | 積水樹脂株式会社 | Melting type road marking material |
JP4981297B2 (en) * | 2005-10-12 | 2012-07-18 | 積水樹脂株式会社 | Melt-type non-slip marking material |
KR100888704B1 (en) * | 2008-06-19 | 2009-03-16 | 대동안전주식회사 | Adhesive paint composition for road marker |
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1993
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