JPS60252667A - Hot-melt road marking paint - Google Patents

Abstract

PURPOSE:To obtain the titled paint having excellent abrasion resistance and durability, utilizing waste firebrick scrap, by using white or light-colored coarse firebrick scrap having a specific particle size as the aggregate, and white or light-colored fine firebrick scrap having a specific particle size as the filler. CONSTITUTION:A white or light-colored firebrick scrap wherein the fraction having particle size of 200-500mum accounts for >=60(wt)% is used as the aggregate, and a white or light-colored firebrick scrap wherein the fraction having particle size of 1-30mum accounts for >=60% is used as the filler. The scraps are compounded together with e.g. petroleum resin, titanium dioxide, glass beads, etc. to obtain the objective paint.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a melt-type road marking paint that is highly durable and economical.

Prior Art Melting type road marking paints used for painting markings such as road center lines, side lines, crosswalks, etc. are used under harsh conditions, so a high degree of durability is required, and the standards for this are in accordance with JIS. 5
665. Such marking paints generally incorporate a large aggregate and a small filler in a vehicle. Table 1 shows examples of formulations of standard road marking paints.

Table 2 shows the performance of the coating compositions according to the Is-5665 standard and the compositions shown in Table 1.

Table 2 As mentioned above, the paints shown in Table 1 fully meet the JIS standards in terms of abrasion resistance and the like. However, in recent years, as the amount of automobile traffic has increased and automobiles have become faster and heavier, it is currently difficult for known paints to maintain a sufficient road marking function over a long period of time.

Therefore, there is a demand for the development of road marking paints with even better durability. In addition, since these paints are consumed in large quantities for road markings, they must not be expensive even if they perform well.

In view of the current situation, the inventor of the present invention has conducted various researches and found that by utilizing used refractory brick scraps generated from steel works, glass factories, etc., durability and economy can be improved. It was discovered that a melt-type road marking paint with excellent properties could be obtained, and the present invention was thus completed.

That is, in the present invention, particles with a particle size of 200 to 500 μm are
A fused type road surface characterized in that the aggregate is white or light-colored refractory brick waste containing at least % by weight, and the filler is white or light-colored refractory brick waste containing 60% by weight or more of particles with a particle size of 1 to 30 μm. This relates to marking paint.

The white refractory brick most consumed in steelworks is low stone brick, which is used for the inner walls of kilns, the lining of steel plates, etc. These will erode with use and will require re-construction, at which time the original firebricks will be recovered as brick waste. Among the collected brick waste, slag,
The parts that are not contaminated with iron oxide, etc. are reused as raw materials for refractories. Furthermore, glass factories use white electroformed alumina bricks in their melting kilns, and the parts that have not been penetrated by glass after use are used again as raw materials for refractories.

In the present invention, the white or light-colored parts of the remaining refractory brick waste recovered as a raw material for refractories are selected and collected, and then crushed and classified to obtain fine particles and fine powder used as aggregate. There are no particular restrictions on the pulverization method, and any commonly used pulverization method may be used. The fine particles used as aggregate are usually about 200 to 500 μm in size at 60%
Those containing the above are preferred.

By further crushing the fine particles or fine powder thus obtained, if necessary, 1 q of fine powder to be used as a filler can be obtained. There are no particular restrictions on the pulverization method in this case, but for example, pulverization can be carried out by placing the material in a ball mill lined with an alumina lining and using alumina balls. The particle size of the fine powder used as a filler is preferably one containing 60% by weight or more of particles having a diameter of about 1 to 30 μm.

An example of a test conducted to examine the abrasion resistance of a melt-type road marking paint using the fine particles and powder thus obtained is shown below. That is, in the road marking paint having the composition shown in Table 1, fine particles obtained from refractory brick scraps or The abrasion resistance after application was investigated for paints containing fine powder and other formulations that were the same as those in Table 1 (according to JIS-5665). The results are shown in Table 3.

As is clear from this, the paint containing fine particles and fine powder made from refractory brick scraps such as alumina brick scraps and low stone brick scraps exhibits excellent wear resistance.

Melt type road marking paints usually consist of a binder resin, a plasticizer, an aggregate, a filler, a pigment, and the like. Since the feature of the present invention lies in the above-mentioned aggregate and filler, there are no particular limitations on the other components of the paint. Therefore, known binder resins, plasticizers, pigments, etc. can be used as appropriate depending on the purpose.

The blending amount of each component in the melt-type road marking paint of the present invention is not particularly limited and can be selected from a wide range; however, in general,
Binder resin 10-20% by weight, plasticizer 1-3% by weight
, 20 to 60 weight percent of aggregate, 20 to 50 weight percent of filler, and 2 to 8 weight percent of filler. Furthermore, in the coating material of the present invention, glass beads, an antisettling agent, an elasticity imparting agent, a stabilizer, and the like may be added as necessary.

The melt-type road marking paint of the present invention is produced by mixing and dispersing a vehicle consisting of a binder resin, a plasticizer, a stabilizer, etc. and a solid content consisting of an aggregate, a filler, a pigment, etc., and melting it during use to paint roads, etc. used for Alternatively, the vehicle is heated and melted, the solid content is uniformly dispersed therein, and the solid content is solidified by cooling.
It can also be melted again before use.

Effects of the Invention The melt-type road marking paint of the present invention exhibits excellent abrasion resistance,
Therefore, it is much superior to conventional products in terms of durability.

In addition, since the refractory brick scraps generated at steel mills and glass factories are effectively used, a very cheap paint can be obtained.

Example Next, the present invention will be explained with reference to Examples.

Example 1 Collect the white part of raw stone dust generated at a steelworks, grind it with a fret mill, and pass it through a vibrating sieve into particles of 1,200 to 5
Fine grains containing 95% by weight of 0.00 μm particles were prepared. 200
The material that passed through a micrometer sieve was charged into a ball mill lined with an alumina lining material, and ground using an alumina ball to a particle size of 1 to 30 micrometers containing 95 micrometers.

Road marking paints were made using these fine particles and powders at the blending ratios shown in Table 4. The characteristic values of this paint (according to JIS-5665) are also listed in Table 4.

Table 4 Using this marking paint, we fused and applied it to a crosswalk in a passageway in a steelworks (δ).The 3rd tunnel constructed with the conventional product required re-construction in 3 to 4 months, but with the present invention. There are 6 to 8 roads constructed with
No re-construction was required.

Example 2 Collect the white part of electroformed alumina brick waste generated from a glass factory, pass it through a show crusher, a cone crusher, and a rotdle in that order, and finally remove iron with Ij'NU FM to reduce particles with a particle size of 200 to 500 μm to 95 Granules containing % by weight were made. The particles that passed through a 200 μm sieve were placed in a ball mill lined with alumina, and finely ground using an alumina ball.
A fine powder containing % heavy mother was obtained.

Using these fine particles and fine powder, marking paints were made at the blending ratios shown in Table 5. Characteristic value of this paint LJIS-5665
) are also listed in Table 5.

Table 5 This marking paint was used to fusion-bond a crosswalk on Mizonai Road at a steelworks. Pathways constructed with conventional products required re-construction after 3 to 4 months, but roads constructed with the product of the present invention did not require re-construction within 8 to 10 months.

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Claims (1)

[Claims] ■ White or light-colored refractory brick waste containing 60% by weight or more of particles with a particle size of 200 to 500 μm is used as aggregate, and the particle size is 1
A molten road marking paint characterized by using white or light-colored refractory brick waste as a filler containing 60% by weight or more of particles with a diameter of ~30 μm.