JP2922106B2 - Heat melting type road marking paint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-melt type road marking paint used for marking various roads on concrete or asphalt road surfaces.

[0002]

2. Description of the Related Art Conventionally, a hot-melt type road marking paint contains a binder resin such as a petroleum resin, a pigment such as titanium oxide, a filler such as calcium carbonate, and the like, and glass beads mixed therein. . In addition, glass beads are generally mixed in an amount of about 15 to 18% by weight with respect to the entire coating material, protrude from the surface of a coating film applied on a road surface, and use the retroreflectivity to enhance nighttime visibility.

[0003]

However, in such a conventional hot-melt road marking paint, the amount of glass beads mixed is as low as 15 to 18% by weight, so that the coating applied to the road surface is worn by traffic of vehicles. In addition, there is almost no glass beads protruding from the coating film surface, and there is a problem that night visibility is remarkably reduced. In addition, paints are simply blended with binder resin, pigments, fillers, etc., and are not particularly abrasion-resistant, and on roads with heavy traffic, the wear of the paint film progresses quickly and the above-mentioned nighttime visibility There is a problem that the property cannot be maintained for a long time.

[0004] It is an object of the present invention to provide a heat melting type road marking paint which has solved the conventional problems.

[0005]

In order to solve the above-mentioned problems, the present invention provides a conventional general-purpose heat-melting type road marking paint by mixing a predetermined amount of an ethylene-vinyl acetate copolymer resin having adhesive properties. By increasing the adhesion between the paint materials, giving flexibility and increasing impact resistance, contributing to abrasion resistance, and increasing the amount of glass beads mixed in, the visibility at night, especially during abrasion, The visibility is improved.

That is, the heat-melt road marking paint of the present invention is a heat-melt road marking paint comprising a binder resin, a pigment, a filler and the like, wherein the ethylene-vinyl acetate copolymer resin is contained in an amount of 1 to 15 with respect to the whole paint. % By weight, particle size 60 ~
710 μm glass beads are 30 to 6
0% by weight is mixed.

As the binder resin blended in the present invention, conventional general-purpose resins may be used. Generally, a petroleum resin is used, but a thermoplastic resin such as a raw rosin, a maleated rosin, a maleated rosin ester, a polyamide resin, an unsaturated polyester resin, and a xylene resin may be used. The compounding ratio of the binder resin is 10 to 2 with respect to the whole paint.
0% by weight is preferred. If the compounding ratio is less than 10% by weight, the fluidity and adhesiveness of the paint are inferior, and if it is more than 20% by weight, the stain resistance of the coating film is deteriorated.

Conventional pigments such as white pigments such as titanium dioxide, zinc white and lithopone, and yellow pigments such as graphite and titanium yellow are used as pigments. The mixing ratio of the pigment is preferably from 2 to 10% by weight based on the whole paint. If the compounding ratio is less than 2% by weight, the coloring power and the hiding power are small, and
If the amount is more than 2% by weight, the effect is not improved any more and only the cost is increased.

As fillers, calcium carbonate, silica sand,
Conventionally used general-purpose materials such as cold water sand and talc are used. The compounding ratio of the filler is preferably from 30 to 50% by weight based on the whole paint. When the compounding ratio is less than 30% by weight, the stain resistance and abrasion resistance of the coating film are inferior.

[0010] The ethylene-vinyl acetate copolymer resin blended in the present invention is used for improving the adhesion between coating materials due to its adhesive force, imparting flexibility to the coating film, and improving impact resistance. Usually, those having a vinyl acetate content of about 30% by weight are preferably used from the viewpoint of adhesiveness and coating film hardness. The mixing ratio of the ethylene-vinyl acetate copolymer resin is preferably from 1 to 15% by weight based on the whole coating composition. If the blending ratio is less than 1% by weight, sufficient abrasion resistance is not obtained in the coating film, and if it is more than 15% by weight, the fluidity of the coating material is deteriorated, the workability is poor, and the edge of the coating film is disordered. Since it cannot be obtained, 1 to 15% by weight is preferable. Especially 2% by weight
When it exceeds, the fluidity gradually worsens and the workability decreases,
1-2% by weight is more preferable because it is difficult to obtain a good mark.

The amount of the glass beads mixed is 30 to 60% by weight based on the whole paint. When the amount is less than 30% by weight, the reflection luminance at the time of abrasion of the coating film is insufficient and the night visibility is inferior. When the amount is more than 60% by weight, the cost increases and the formation of the coating film is hindered. % By weight is preferred. In particular, a sufficient reflection luminance at the time of abrasion of the coating film is secured, and 40 to 50% by weight is obtained from the surface where the construction and the coating film formation are good.
Is more preferred. Also, particle size 60 as glass beads
Those having 710 μm and a refractive index of 1.5 or more are preferably used, particularly when high-brightness glass beads are used, because night visibility is further improved.

In the present invention, in addition to the above, other additives such as waxes of antioxidants and anti-settling agents, or plasticizers such as vegetable oils, vegetable oil-modified alkyd resins, phthalic acid esters, etc. are added in appropriate amounts as required. May be done.

[0013]

Embodiments of the present invention will be described below. It consists of binder resin (petroleum resin), pigment (titanium oxide), filler (calcium carbonate), glass beads, and additives (wax, plasticizer). Using paints (No. 1 to No. 3), these paints are each melted at a temperature of about 200 ° C. and uniformly applied on an aluminum plate to form a coating film having a width of 15 cm, a length of 50 cm, and a thickness of 2.0 mm. Formed.

The surface of the above-mentioned coating film is uniformly abraded for about 1 minute using Plasshot TSP60 manufactured by Toshiba Barotini Co., Ltd. with an as-con blast cabinet BA-1 type direct pressure type machine (manufactured by Atsushi Iron Works), and drying of the coating film after abrasion. The reflection luminance at arbitrary 10 points was measured by a luminance measuring device between the time and the wet time, and the results are shown in Table 2. In the abrasion test, resin powder was used as sand blast to reproduce the abrasion caused by the tire, and the abrasion was uniformly performed without destruction of the glass beads.

[0015]

[Table 1]

[0016]

[Table 2]

From Tables 1 and 2, it was confirmed that the reflection luminance value after abrasion was sequentially increased as the amount of glass beads mixed increased. Next, in particular, No.
Using the paint No. 3 as a base, the abrasion resistance of the coating film by blending the ethylene-vinyl acetate copolymer resin was examined.

It consists of a binder resin (petroleum resin), a pigment (titanium oxide), a filler (calcium carbonate), glass beads, and additives (wax, plasticizer), and an ethylene-vinyl acetate copolymer resin (EVA). (Evaflex 220 manufactured by Mitsui Petrochemical Co., Ltd.) was used, and five kinds of paints (Examples 1 to 3 and Comparative Examples 1 and 2) shown in Table 3 were used. Melted, JIS K
5665 Tested according to three types of abrasion resistance test methods,
The results (wear loss) are shown in Table 3.

[0019]

[Table 3]

As can be seen from Table 3, it was confirmed that the wear loss was large in Comparative Examples 1 and 2, and the wear loss was small in Examples 1 to 3. Further, in Example 3 in which the blending amount of the ethylene-vinyl acetate copolymer resin was 2% by weight, the fluidity of the paint was lower than in Examples 1 and 2, and the surface of the coating film had a little stickiness.

[0021]

As described in detail above, the heat-melt road marking paint of the present invention contains ethylene-vinyl acetate copolymer resin in an amount of 1 to 15% by weight based on the whole paint and glass beads for the whole paint. Since it is contained in an amount of 30 to 60% by weight, the abrasion resistance of the coating film formed on the road surface can be improved as compared with the related art, the night visibility at the time of abrasion can be improved, and its reflection can be performed for a long time. Performance can be maintained.

Claims (1)

(57) [Claims] 1. A heat melting type road marking paint comprising a binder resin, a pigment, a filler and the like, wherein an ethylene-vinyl acetate copolymer resin is blended in an amount of 1 to 15% by weight based on the whole paint,
A hot-melt road marking paint in which glass beads having a particle size of 60 to 710 μm are mixed in an amount of 30 to 60% by weight based on the whole paint.