JPS63122763A - Coating composition for running surface of track - Google Patents

Abstract

PURPOSE:To obtain the titled composition giving a coating film having excellent abrasion resistance and removability of deposited ice and snow from the film and applicable within a short period in the intervals of operation of trains, by adding three kinds of aggregate having different particle diameter to a binder. CONSTITUTION:The objective composition is produced by compounding (A) 100pts.wt. of acrylic syrup, a thermoplastic polyamide resin or an epoxy-polythiol binder with (B) a mixture of (i) 10-80pts.wt. of aggregate having particle diameter of 0.5-1.0mm and a Mohs hardness of >=6.5, (ii) 50-300pts.wt. of aggregate having particle diameter of 0.2-1.0mm and Mohs hardness of >=6.5 and (iii) 20-150pts.wt. of aggregate having particle diameter of <=0.1mm. A coating of a road surface having high abrasion resistance and excellent removability of deposited ice and snow from the coating can be formed within a short working period by applying the mixture with an applicator capable of controlling the coating thickness of the running surface of a track at a width wider than the width of tire. The composition is useful also for the protection of the rail surface of a new municipal transportation system.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a composition for covering a track running surface, and more specifically, the present invention relates to a composition for covering a track running surface, and more specifically, it relates to a composition for coating a track running surface, and more specifically, a new urban transportation medium-volume transportation system (lateral guidance system) (hereinafter referred to as a new urban transportation system). The present invention relates to a covering material that is applied to protect the track surface constructed of concrete, especially the surface on which tires pass.

[Conventional technology]

In recent years, the guidance system for vehicles equipped with tires used in new urban transportation systems is a guide rail system on both sides, which means that the vehicle's tires always pass through the same location on the concrete track surface. This has the disadvantage that only the concrete on the road surface where the tires pass is worn out and dug. Furthermore, ice and snow tend to adhere to concrete surfaces during the winter and are difficult to remove, often causing problems that require train service to be stopped. For this reason, epoxy resin mortar, etc., has traditionally been painted on the track running surface, but this method takes a very long time to harden, making it difficult to work during times when regular trains are not in operation, so it is rarely used at present. Not yet.

[Problem that the invention seeks to solve]

Therefore, the present invention has been devised and developed to solve the above-mentioned problems. By applying this coating to the track running surface in a width larger than the tire width, it is possible to create a coating that has excellent wear resistance, makes it easy to remove ice and snow, and can be worked on during short periods when trains are not in operation. I was able to achieve this.

[Means/effects for solving the problem] According to the present invention, for 100 parts by weight of acrylic silub, thermoplastic polyamide resin or epoxy-polythiol binder,
10 to 80 parts by weight of aggregate with a particle size of 0.5 to 1.0 mm and a Mohs hardness of 6.5 or more; 50 to 300 parts by weight of aggregate with a particle size of 0.2 to 1.0 mm and a Mohs hardness of 6.5 or more The above-mentioned problems have been solved by a composition for coating a track running surface comprising a mixture of:

The acrylic resin used in the track running road surface coating composition of the present invention is a syrup-like resin made by mixing a polymer or oligomeric acrylic resin with a mixture of (meth)acrylic acid monomer or other vinyl monomer. And as a thermoplastic polyamide resin binder, it is based on dimer acid and has a melt viscosity of 3 to 3 at 200℃.
Examples include those having a softening point of 80 poise and a softening point of 90 to 160°C. The resin itself of these binders has excellent abrasion resistance and is characterized by rapid curing. Although epoxy-polythiol binders also have some drawbacks in terms of price, they have a high curing rate and are therefore preferable for the composition of the present invention.

The aggregate used in the track running road surface coating composition of the present invention has a particle size of 0.5 to 1°0alII+ and a Mohs hardness of 6.5 in order to improve wear resistance, slip resistance, and painting workability. Aggregates with a particle size of 0. Aggregates with a particle size of 2 to 1.0 mm and a Mohs hardness of 6.5 or more are used, and aggregates with a particle size of 0.1 m+11 or less are mixed to improve painting workability.

Here, instead of using aggregate with a particle size of 0.5 to 1.0 and a Mohs hardness of 6°5 or more, the particle size is 0.5 to 1.0. Using aggregate with a Mohs hardness of 6.5 or higher with a thickness of 2 to 0.1 mm makes the coating surface too smooth due to the particle size distribution, making it easy to remove ice and snow, but making it slippery and dangerous. Therefore, it is not suitable for this coating composition. Furthermore, instead of the same aggregate with a particle size of 0.5 to 1.01 and a Mohs hardness of 6°5 or more, aggregate with a particle size of 1.0 to 1.01 and a Mohs hardness of 6°5 or more
2. If you change to 0mm aggregate, on the other hand, the coating surface will become too rough, making it less slippery and safer, but it will make more noise when the train is running, and it will be difficult to remove ice and snow. Not suitable for this coating composition. Also, the particle size is 0.2
If aggregate with a particle size of 0.5 to 1.0 mm and a Mohs hardness of 6.5 or more is used instead of aggregate with a Mohs hardness of 6.5 or more and a particle size of ~1.0 mm, the painting workability will be poor, so this book Not suitable for coating compositions.

Therefore, in the coating composition of the present invention, 10 to 80 parts by weight, preferably 30 to 60 parts by weight of aggregate having a particle size of 0.5 to 1.0 mm and a Mohs hardness of 6.5 or more, to 100 parts by weight of the binder. 50 to 300 parts by weight, preferably 100 to 200 parts by weight, of aggregate with a particle size of 0°2 to 1.0 mm and a Mohs hardness of 6.5 or more, and 20 parts by weight of aggregate with a particle size of 0.1 mm or less. ~150 parts by weight, preferably 50-100 parts by weight
Parts by weight of coating compositions are suitable. Here, the aggregate having a particle size of 0.11 mm or less is used solely for improving the fluidity and workability of the composition, and there is no need to particularly limit the hardness.

Applicator painting, spray painting, trowel painting, etc. can be applied to the road surface with the track running road surface coating composition of the present invention, but the painting work must be done in a short time when trains are not in operation. and the need to eliminate concavities in the concrete created by the passing of vehicle tires (because water collects in the concavities and can easily freeze, leading to a situation where train operations are halted).

) and other conditions must be considered. Therefore, in the case of spray painting, if one spray is applied, the recesses remain as they are, and in order to avoid leaving recesses, a large amount of spray must be applied to the recesses, which is very time-consuming and undesirable. Further, in the case of painting with a trowel, it is not preferable because it is not possible to finish in one step and also leaves trowel marks and recesses. Finally, in the case of applicator painting, it is possible to work in a short time by simply pushing or pulling the atomizer, and it is also possible to finish the entire surface in a flat shape, so applicator painting is preferable. Furthermore, in view of the particle size of the aggregate used in the coating composition of the present invention, an applicator adjusted so that the coating film thickness is 1°0 to 4.0 m+w, preferably 1.5 to 3.0 mm. Painting is preferred.

If the coating thickness is less than 1.0 mm, the coating will not be finished in a uniform state due to the particle size of the aggregate (streaking and protrusions of the aggregate will be noticeable), and the coating surface will become rough.
This is undesirable because it increases noise and tire wear. On the other hand, if the coating thickness is 4.01 or more, it is not preferable because the coating material may flow just before it hardens or the coating surface may become smooth and the wheels may easily slip. Coating film thickness is 1.0-4.0mm
In this case, the aggregate forms appropriate protrusions, so there is no noise and significant tire wear, and a desirable coating film is obtained that prevents the wheels from slipping.

In addition, if acrylic silub is used as a binding material during painting, benzoyl peroxide is used as a hardening agent just before painting.
50% by weight) is used by mixing and stirring 1% to 3% by weight. When thermoplastic polyamide resin is used as the binder, it is heated and melted at about 200°C.

The present invention will be explained in more detail with reference to the following examples and comparative examples.

Example 1 Acrylic silub (manufactured by Mitsubishi Rayon Co., Ltd., trade name: acrylic silub DR-460): 100 parts by weight Particle size 0
．． Cera 9218 grains with a Mohs hardness of 7.5 at 5-1.0 mm = 20 grains with a grain size of 0.2-1.0 mm
Silica sand No. 5 with a Mohs hardness of 7: 1
70 parts by weight Calcium carbonate with a particle size of 0.1+m or less:
A coating composition was obtained by mixing and stirring 2% by weight of benzoyl peroxide (TFFI degree 50% by weight) into 60ml/t part of the mixture.

Example 2 Acrylic silub (manufactured by Mitsubishi Rayon Co., Ltd., trade name Niacrylic silub DR-460): 100 parts by weight Cera 9 with a particle size of 0.5 to 1.0 IIIol and a Mohs hardness of 7.5
218 grains: 40 parts by weight Particle size 0.2-1
．． Silica sand No. 5 with 0neII+ and Mohs hardness of 7
= 130 parts by weight Calcium carbonate with a particle size of 0.1 mm or less Add benzoyl peroxide (
: 50% by weight) was mixed and stirred to obtain a coating composition.

Example 3 Acrylic silub (manufactured by Mitsubishi Rayon Co., Ltd., acrylic silub DR-460): 100 parts by weight Cera 9218 with a particle size of 0.5 to 1.0 mm and a Mohs hardness of 7.5
Particles Near 0 parts by weight Particle size 0.2-1.0m
No. 5 silica sand with a Mohs hardness of 7 m, near 0 parts by weight, particle size 0. Calcium carbonate below in++++: 80 parts by weight of benzoyl peroxide (concentration 50
% by weight) were mixed and stirred to obtain a coating composition.

Example 4 Thermoplastic polyamide resin (manufactured by Henkel Hakusui Co., Ltd., Persalon 113B): 100 parts by weight Cera 921 with a particle size of 0.5 to 1.0 and a Mohs hardness of 7.5
8 grains? 20! Part particle size 0.2-1
．． Silica sand No. 5 with a Mohs hardness of 7
: 170 parts by weight Calcium carbonate having a particle size of 0.1 mm or less: 60 parts by weight were heated and melted at 200° C., mixed and stirred to obtain a coating composition.

Example 5 Thermoplastic polyamide resin (manufactured by Henkel Hakusui Co., Ltd., Persalon 113B): 100 parts by weight Cera 92 with a particle size of 0.5 to 1.0 mm and a Mohs hardness of 7.5
18 grains: 40 parts by weight Particle size 0.2-1.
No. 5 silica sand with a Mohs hardness of 7 on the axis
= 130 parts by weight 0 parts by weight of calcium carbonate having a particle size of 0.1 m+w or less was heated and melted at 200°C, mixed and stirred to obtain a composite acid for coating.

Example 6 Thermoplastic polyamide resin (manufactured by Henkel Hakusui Co., Ltd., Persalon 1138): 100 parts by weight 18 grains of Cera9f with a particle size of 0.5 to 1.0 mm and a Mohs hardness of 7.5: 70 fE parts particle size 0 .2
Silica sand No. 5 with ~1.0 mm and Mohs hardness of 7
Calcium carbonate having a particle diameter of 0.1 or less: 80 parts by weight was heated and melted at 200° C., mixed and stirred to obtain a coating composition.

Example 7 Epoxy resin (manufactured by Shell Kagaku Co., Ltd., trade name: Epicote 828): 60 parts by weight Polythiol curing agent (manufactured by Toyo Rayon Co., Ltd., trade name Nito Shithiokol LP3): 40 parts by weight Amine catalyst (Shell Chemical Co., Ltd., product name: DMP30): 0.2
Particle size in parts by weight: 0.5-1. 18 grains of Sera 9 with a Mohs hardness of 7.5 in Omm: Silica sand No. 5 with a grain size of 0.2 to 1.0 mm and a Mohs hardness of 7 in the 40jtit section
: 130 parts by weight 0 parts by weight of calcium carbonate having a particle size of 0.1 mm or less were mixed and stirred to obtain a coating composition.

Comparative Example 1 Acrylic Silica Rubber (manufactured by Mitsubishi Rayon Co., Ltd., Acrylic Silica Rubber DR-460): 100 parts by weight Silica sand No. 5 with a particle size of 0.2”l, 0LIIr@ and a Mohs hardness of 7
: 170 parts by weight Particle size 0. llm
- 2% by weight of benzoyl peroxide (concentration: 50% by weight) was mixed and stirred into a mixture of 70 parts by weight of the following calcium carbonate to obtain a mixture.

Comparative example 2 Acrylic silub (manufactured by Mitsubishi Rayon Co., Ltd., acrylic silub DR-460): 100 parts by weight Cera 9 F1 with a particle size of 0.5 to 1 and a Mohs hardness of 7.5 at 0 mm
8 grains: 100 parts by weight Particle size 0.2-1
, No. 5 silica sand with Mohs hardness of 7 in Omn+
: 40 parts by weight A mixture of 0 parts by weight of calcium carbonate having a particle size of 0.1 mm or less was mixed with 2% by weight of benzoyl peroxide (concentration 50% by weight) and stirred to obtain a mixture.

Comparative example 3 Acrylic silub (manufactured by Mitsubishi Rayon Co., Ltd., acrylic silub DR-460) 7100! Weight part particle size 0
．． 18 grains of Sera9 with a grain size of 5 to 1.0 mm and a Mohs hardness of 7.5 = 20 parts by weight Silica sand No. 5 with a grain size of 0.2 to 1.0 mm and a Mohs hardness of 7: 25
0 parts by weight Calcium carbonate with a particle size of 0.1 mm or less: 10
A mixture of benzoyl peroxide (tffi degree: 50 degrees: 0% by weight) was mixed and stirred into a mixture of parts by weight to obtain a mixture.

Comparative example 4 Acrylic silub (manufactured by Mitsubishi Rayon Co., Ltd., acrylic silub DR-460): 100 parts by weight Cerasa 7 de A with a particle size of 1.0 to 2.0 mm and a Mohs hardness of 7.5
Grains: 40! lli part particle size 0.2~
1. Silica sand No. 5 with a Mohs hardness of 7 on + n
: 130 parts by weight Calcium carbonate with a particle size of 0.1 or less
(Concentration: 50% by weight) was mixed and stirred to obtain a mixture.

Comparative example 5 Acrylic silub (manufactured by Mitsubishi Rayon Co., Ltd., acrylic silub DR-460): 100 parts by weight Cera 9 F1 with a particle size of 0.5 to 1 and a Mohs hardness of 7.5 at 0 mm
8 grains: 4o parts by weight particle size 0.2-1.0
Calcium carbonate with a Mohs hardness of 3:
130 parts by weight Particle size 0.1m! Calcium carbonate below I
2% by weight of benzoyl peroxide (concentration 50% by weight) was mixed and stirred into 0 parts by weight of the mixture to obtain a mixture.

Comparative Example 6 Examples of conventionally used epoxy resin mortar: Epoxy resin (manufactured by Shell Chemical Co., Ltd., Epicoat 82B) Near 0 overlapped part amine hardener (manufactured by CACR Corporation, HeCR Hardener) 13219
) = 30 parts by weight Mixture of silica sand Nos. 5, 6, and 7: 600 parts by weight were mixed to obtain a mixture.

Comparative Example 7 A mortar of commercially available cement 1:sand 2 was prepared and subjected to the following test as it was.

The compositions and mixtures obtained in the above Examples and Comparative Examples were comparatively tested as follows.

Comparative test-1 Example! Using the composition of Comparative Example 1-7 and the mixture of Comparative Example 1-4, a test was conducted to confirm the workability and surface condition of the coating film when applied with an applicator.

The test results are shown in Table 1.

Test method: Workability was determined using a cylinder with an inner diameter of 9 mm at the conical bottom of a cylinder with an inner diameter of 57 mm.
A container with holes was filled with the coating composition, and the time required for 200 g of the composition to fall into the container below was measured using a stopwatch. However, this cylindrical container was one that could be adjusted in temperature, and the compositions of Examples 1 to 3 and Example 7 and the mixtures of Comparative Examples 1 to 4 were kept at room temperature of 20°C, and the compositions of Examples 4 to 6 were kept at room temperature of 20°C. Measurements were made by heating the melt to 200°C and adjusting the temperature of cylindrical containers to approximately 20°C and 200°C, respectively.

The finished state of the paint film surface was evaluated by ■Appearance evaluation of the uniformity of the paint film surface (○: Good, The slip resistance value on the wet surface was measured using a slip resistance tester.

As noted in Table 1, the smaller the number, the better the workability, and approximately 1
Approximately 0 seconds is suitable for actual work.

Note-2: The higher the slip resistance value, the less likely it is to slip, and under normal train running conditions, a value of 50 or more on a wet surface is good.

As is clear from the results in Table 1, the composition for coating track running surfaces of the present invention has good coating workability, a uniform finish, moderate slip resistance, and less wear. A coating film exhibiting excellent coating performance is obtained.

On the other hand, the particle size is 0. Slip resistance was poor when a plaster with a particle diameter of 5 to 1.0 mm was not used (Comparative Example 1), whereas when too much was used (Comparative Example 2) and when a plaster with an even larger particle size was used (Comparative Example When applying 4) with an applicator, the aggregate gets caught and causes streaks, resulting in a poor surface condition, making it impossible to obtain sufficient performance of the coating composition.

Comparative Test-2 A wear resistance test was conducted using the compositions of Examples 1 to 7 and the mixtures of Comparative Examples 5 to 7. The test results are shown in Table 2.

Test method: The compositions of Examples 1 to 7 and the mixtures of Comparative Examples 5 and 6 were coated on an aluminum plate with a coating thickness of 2.0 cm. The mixture of Comparative Example 6 was cured for one day, and the mixture of Comparative Example 6 was cured for one week, and the mixture of Comparative Example 7 was subjected to a taper abrasion test using a mortar plate with a thickness of 10 mm manufactured by Nippon Test Panel Industry Co., Ltd. In the taper wear test, C3-17 was used as the wear ring, the load was 1 kg, and 10
The amount of wear at 0 rotations was measured.

As is clear from the results in Table 2, the track running road surface coating composition of the present invention exhibited wear resistance equal to or higher than that of the conventional coating composition (Comparative Example 6).

On the other hand, when silica sand No. 5 with a particle size of 0.2 mm to 1.0 mm and a Mohs hardness of 7 was replaced with calcium carbonate with a Mohs hardness of 3 (Comparative Example 5), the wear was lower than that of the 1:2 mortar (Comparative Example 7). Although the amount was small, the wear resistance was insufficient.

Comparative Test-3 (Actual Road Surface Test) The compositions of Examples 2 and 5 and the mixture of Comparative Example 6 were tested on the train siding track of Saitama New Urban Transit/Ina Line at a temperature of 5°C. 30 each for
Comparative Example 6 was painted in a length of 5 m and tested for the required construction time including base treatment and curing time, ice and snow removability during winter, and durability. The test results are shown in Table 3.

Table 3 As is clear from the results in Table 3, when using the track running road surface coating composition of the present invention, concrete surface treatment (removal of laitance and application of a primer similar to the conventional method) and curing are required. The time required for construction, including construction time, has been significantly shortened.

On the other hand, the conventional product (Comparative Example 5) required about 8 hours (480 minutes) because the temperature was as low as 5°C.

〔Effect of the invention〕

According to the track running road surface coating composition of the present invention, it is possible to coat a road surface with wear resistance and easy removal of ice and snow in a short working time, making it ideal for road surface protection for new urban transportation. This has the following effects.

・Lee H tail:! i,

Claims (1)

[Claims] 1 part of aggregate with a particle size of 0.5 to 1.0 mm and a Mohs hardness of 6.5 or more per 100 parts by weight of acrylic syrup, thermoplastic polyamide resin, or epoxy-polythiol binder
0 to 80 parts by weight, 50 to 300 parts by weight of aggregate with a particle size of 0.2 to 1.0 mm and a Mohs hardness of 6.5 or more, and a particle size of 0.2 to 1.0 mm.
A composition for covering a track running surface, which is made of a mixture of 20 to 150 parts by weight of aggregates having a diameter of 1 mm or less.