JP4595066B2 - Anti-slip treatment method for lining plate and lining plate therefor - Google Patents

Description

【００２６】
【表２】

【００２７】

【００２８】
実施例２
覆工板表面にショアーＤ硬度８５ウレタン樹脂にて２ｍｍになるようローラーで塗布し、すぐに、珪砂３号を被覆材が見えなくなるまで散布する。２４時間自然乾燥後、余分な珪砂を取り除き、防滑層を形成させた。
【００２９】

【００３０】
比較例１
覆工板表面に被覆材（タールエポキシ樹脂：配合比＝１／１ 可使時間２０分）にて２ｍｍになるようローラーで塗布し、すぐに、珪砂３号を被覆材が見えなくなるまで散布する。２４時間自然乾燥後、余分な珪砂を取り除き、防滑層を形成させた。
【００３１】

【００３２】
比較例１
覆工板表面に被覆材（エポキシ樹脂：配合比＝２／１ 可使時間３０分）にて２ｍｍになるようローラーで塗布し、すぐに珪砂３号を被覆材が見えなくなるまで散布する。２４時間自然乾燥後余分な珪砂を取り除き、防滑層を形成させた。
【００３３】

【００３４】
実施例１〜２及び比較例１〜２で得られた試験板につき、建材試験センターに付着強さを測定したところ表３の通りであった。実際の道路に置き、観察した結果は、表４の通りであった。
【００３５】
【表３】

【００３６】
【表４】

【００３７】
表３より、本発明による実施例においては、接着性は比較例に比べて優れており、すべて材料破壊となっている。また、表４からは、実施例においては、１年後においてもニート層には異常なく優れた防滑性能を有していた。比較例１では４ヶ月後には、クラックが発生し、剥離している常態で、１年後には、ほとんど剥離していた。
【００３８】
【発明の効果】
本発明は、覆工板の防滑処理方法において(1)鋼板の表面にプライマーを塗布することなく、(2)鋼板の表面に直接二液性常温硬化型ポリウレタン樹脂を塗布した後、(3)骨材を散布して防滑面を得る方法である。即ち、プライマーを塗布するという面倒でコストのかかる工程が省略でき、それでいて鋼材表面に堅固に接着して長期の耐久性を有する防滑表面を得ることができる。
【００３９】
本発明により得られる覆工板の防滑層は、プライマー無しでも鋼板と接着性が高く、伸びがあるために、まず、覆工板の金属表面の被覆膜となり、金属の劣化を防ぎ、次に、ニート層のヒビ割れ、剥離が生じにくくなり、その結果、長期間の接着性、滑り止め効果を保持できるものである。[0001]
[Industrial application fields]
The present invention relates to an anti-slip treatment method for a lining board used for a temporary road having excellent workability and long-term anti-slip property, and the lining board.
[0002]
[Prior art]
Currently, construction of subways, water and sewage systems, gas conduits, electrical wiring, highways, etc. is being actively conducted in large cities in order to further improve the social infrastructure. Due to road excavation accompanying these underground works, lining plates based on H-shaped steel are used as temporary roads. The steel plate surface of the lining plate is provided with an anti-slip function having protrusions such as a lattice pattern, but does not satisfy the anti-slip property when it is noisy and wet. Therefore, in general, a method of applying a surface covering treatment to the steel plate surface of the lining plate using concrete, concrete mortar, asphalt or epoxy resin is employed.
[0003]
[Problems to be solved by the invention]
However, the coating treatment can reduce noise and improve anti-slip properties, but the former concrete or concrete mortar has problems with long-term durability due to cracking and chipping, and the latter asphalt is flexible, It is said that the durability and the durability are inferior due to easy peeling and wear due to the poor adhesion and coating strength. Epoxy resins are relatively good but have a shortage of wear resistance. In addition, they have the disadvantages of low curability at low temperatures and slow time for winter coating, leading to reduced production efficiency. ing.
[0004]
In addition, methods for preventing slippage of the steel surface using a two-component room temperature curing type polyurethane resin are also employed, but these methods are usually subjected to a primer treatment so that the polyurethane resin and the steel material adhere to the surface of the steel material. Thereafter, a polyurethane resin is applied and various anti-slip treatment methods are performed. The polyurethane resin has a hardness of 35 to 40 according to a JISD hardness meter used as a general coating floor material, and a primer is indispensable in order to ensure adhesion to the steel material surface. Moreover, even in the prescription using a primer, the adhesiveness with a steel plate is insufficient, and the coating layer is easily peeled off and cannot be used for a long period of severe use. Therefore, it is hardly used in this field.
[0005]
[Means for Solving the Problems]
In order to improve these drawbacks, the present inventors have worked on the development of a surface anti-slip treatment method for a lining plate using a polyurethane resin, and have completed the present invention.
[0006]
That is, in the present invention, before applying the primer on the surface of the steel lining plate, before applying the two-component room temperature curing type polyurethane resin having a cured product having a Shore D hardness of 50 or more and curing the polyurethane resin. An anti-slip treatment method for a lining board, characterized in that the aggregate is spread on the surface and the urethane resin is cured and the aggregate not adhered to the polyurethane resin is removed, preferably a two-component room temperature curing polyurethane resin, The solid content is 90% by weight or more, and the physical properties of the cured product have a performance of elongation of 10% or more by a test method according to JIS K-6301. Preferably, the aggregate is an inorganic or organic bone. The present invention provides a lining plate characterized by containing 50% by weight or more of a material having an average particle size of 0.2 to 2.0 mm and having been treated by these anti-slip treatment methods.
[0007]
The present invention will be described in detail below.
The lining board of the present invention is used for road surface lining of various civil engineering works, lining of temporary piers at civil engineering construction sites, etc., and several pieces of grooved steel, H-shaped steel, etc. having a thickness of about 5 to 15 mm. Welded and welded, and the end four sides are either completely sealed or partially sealed with steel plate, or not sealed, and the center part is welded with a rib and has a reinforcing structure, the surface has a round pattern, It is a steel plate surface on which irregularities such as a square pattern and a lattice pattern are rolled. In the recovered lining plate, the surface layer is paved with cement mortar or the like, and the surface is removed to remove the steel plate surface.
[0008]
As a two-component room temperature curable polyurethane resin, the cured product has a Shore D hardness of 50 or more, preferably a solid content of 90% by weight or more, and a JIS K6301 (additive rubber physical test method) elongation of 10% or more. It is what you have. Particularly preferred is a resin having a solid content of 92 to 100%, a Shore D hardness of 60 to 90, and an elongation of 30 to 250%. The normal temperature indicates 15 to 25 ° C. according to JIS K 0050.
[0009]
The two-component room temperature curable polyurethane resin used in the present invention is preferably a polyol mixture (A) containing, as an essential component, an aromatic polyol having two or more hydroxyl groups and a hydroxyl equivalent weight of 50 or more, two in the molecule. It is a resin comprising the above-described polyisocyanate compound (B) having a free isocyanate group, and is obtained by blending a solvent, a catalyst, a pigment and the like as required.
[0010]
The aromatic polyol (A) of the present invention is preferably a linear compound having two or more hydroxyl groups at the terminal and having a plurality of aromatic rings, for example, aromatic resins such as xylene formaldehyde resin, bisphenol resin, novolac resin, A product obtained by adding an alkyl oxide such as ethylene oxide or propylene oxide to the end of an aromatic compound such as bisphenol A or bisphenol B, or an alicyclic resin obtained by hydrogenating such a product, or ethylene glycol added to phthalic acid. A polyol mixture having two or more hydroxyl groups, such as a reacted resin, is preferably used.
[0011]
The xylene formaldehyde resin is an oligomer obtained by the reaction of meta-xylene and formaldehyde and an oligomer obtained by reacting it with a third component (an amino group-containing compound or an unsaturated group-containing compound).
[0012]
The novolak resin is an oligomer obtained by reacting phenols with formaldehyde and an oligomer obtained by reacting a third component (an amino group-containing compound or an unsaturated group-containing compound).
[0013]
Bisphenol resins are bisphenol compounds, and bisphenols used include bisphenol A [2,2′-bis (4-hydroxyphenyl) propane], bisphenol B [2,2′-bis (4-hydroxy). Phenyl) butane], bisphenol F [2,2 ′-(4-hydroxyphenyl) methane], bisphenol S [2,2 ′-(4-hydroxyphenyl) sulfone] and 2,2 ′-(4- Hydroxyphenyl) hexafluoropropane.
[0014]
Furthermore, the polyol (A) of the present invention may preferably be a polyol-type xylene formaldehyde resin, the structure of which is metaxylene linked by an alkylene, acetal or ether bond, and the terminal is a xylene nucleus and a methylol group or methoxy. It has a multimolecular structure containing a methyl group. This polyol type xylene formamide resin can be obtained by introducing a methylol group or a methoxymethyl group at the end of a xylene formaldehyde resin obtained by reacting meta-xylene and formalin in the presence of a strong acid catalyst. Furthermore, one or two or more compounds having active hydrogen such as phenols, carboxylic acids, amines, alcohols, or aromatic hydrocarbons in the above-mentioned reactive bonding groups and terminal groups in the xylene formaldehyde resin. May be contained.
[0015]
The isocyanate compound (B) having two or more free isocyanate groups includes 2,4 and 2,6 toluene diisocyanate (TDI), diphenylmethane 4,4′-diisocyanate (pure or monomeric MDI), polymeric MDI. , Crude MDI, hexamethylene diisocyanate (HDI), trans-cyclohexa-1,4-diisocyanate (CHDI), isophorone diisocyanate (IPDI), m-xylene diisocyanate (XDI), naphthalene diisocyanate (NDI), p-phenylene diisocyanate (PPDI) ), 4,4′-diphenylmethane triisocyanate (Desmodur RI), and NCO-terminated prepolymers of these isocyanate compounds and active hydrogen-containing compounds (prepolymerization) And a carbodiimide, etc. polyisocyanate compounds such as liquid modified polyisocyanate.
[0016]
Crude MDI [MR-100, MR-200, MR-400 (manufactured by Nippon Polyurethane)] or modified liquid MDI [Isonate 143L (made by Kasei Upjohn)] is preferable.
[0017]
As the aggregate, various materials can be used without particular limitation as long as they have chemical stability to the resin and are wear resistant. Preferably, the average particle diameter is in the range of 0.2 to 2.0 mm, inorganic aggregates are silica sand, silicon carbide, carbon random, alumina stone grains, etc., and organic aggregates are, for example, pulverized FRP, rubber chips, A typical example is wood chip.
[0018]
The term “before curing” refers to the time until the aggregate sinks when the aggregate is sprayed on the urethane resin film, and refers to the time until the mixed viscosity of the urethane resin reaches 200,000 cps.
[0019]
Applying means that the urethane resin is uniformly spread using a spraying machine, a roller or a trowel, a brush or the like, and the surface of the object is covered with the urethane resin film.
[0020]
“Sprinkling” means that the aggregate is evenly spread until the urethane resin film becomes invisible by hand or mechanically spreading the applied urethane resin film.
[0021]
In the anti-slip treatment method of the present invention, there is a case where no treatment is required as long as it is the first lining plate to be subjected to the anti-slip treatment. However, it is preferable that a foreign matter such as rust, paint, oil, etc., whose surface is easily removed, be simply blasted. It is better to remove by treatment and dry the surface. A two-component room temperature curable polyurethane resin is preferably applied to the surface so that the average coating thickness is 0.2 to 5.0 mm, more preferably 0.5 to 2.0 mm, and the polyurethane resin is not cured. Further, an excessive amount of inorganic or organic aggregate having an average particle diameter of 0.2 to 2.0 mm is spread on the surface so that the polyurethane resin is hidden. Further, after the polyurethane resin is cured, the non-adhered aggregate is removed with a scissors, a vacuum cleaner or the like to obtain an anti-slip lining plate.
[0022]
Examples will be described in more detail below. In the examples, the weight standard is indicated by “parts”.
[0023]
Example 1
The surface of the lining plate was coated with a urethane resin (made by Dainippon Ink & Chemicals, Inc .: Praiadec HF3000, the physical properties are shown in Tables 1 and 2 below) with a roller, and immediately, silica sand No. 3 was coated. Spread until no longer visible. After natural drying for 24 hours, excess silica sand was removed to form an anti-slip layer.
[0024]
A polyol mixture (A) containing, as an essential component, a polyol-type xylene formaldehyde resin having a hydroxyl equivalent of 50 or more having two or more hydroxyl groups, and a polyisocyanate having two or more free isocyanate groups in the molecule. A urethane-based hard composition comprising a narate compound (B).
[0025]
[Table 1]

[0026]
[Table 2]

[0027]

[0028]
Example 2
The surface of the lining plate is coated with a roller with a Shore D hardness of 85 urethane resin so as to be 2 mm, and immediately, silica sand No. 3 is sprayed until the coating material becomes invisible. After natural drying for 24 hours, excess silica sand was removed to form an anti-slip layer.
[0029]

[0030]
Comparative Example 1
Apply the coating material (tar epoxy resin: blending ratio = 1/1 usable life 20 minutes) to the surface of the lining plate with a roller so that it becomes 2 mm, and immediately spread silica sand No. 3 until the coating material is no longer visible. . After natural drying for 24 hours, excess silica sand was removed to form an anti-slip layer.
[0031]

[0032]
Comparative Example 1
Apply the coating material (epoxy resin: compounding ratio = 2/1 working life 30 minutes) to the surface of the lining plate with a roller so as to be 2 mm, and immediately spread silica sand No. 3 until the coating material is no longer visible. After natural drying for 24 hours, excess silica sand was removed to form an anti-slip layer.
[0033]

[0034]
It was as Table 3 when the adhesion strength was measured in the building material test center about the test board obtained in Examples 1-2 and Comparative Examples 1-2. Table 4 shows the results of observation on an actual road.
[0035]
[Table 3]

[0036]
[Table 4]

[0037]
From Table 3, in the Example by this invention, adhesiveness is excellent compared with the comparative example, and all are material destruction. Also, from Table 4, in the examples, even after one year, the neat layer had excellent anti-slip performance without abnormality. In Comparative Example 1, cracks occurred after 4 months, and in a normal state where the cracks were peeled off, they were almost peeled off after 1 year.
[0038]
【The invention's effect】
The present invention provides an anti-slip treatment method for a lining plate (1) without applying a primer to the surface of the steel plate, (2) after directly applying a two-component room temperature curing polyurethane resin to the surface of the steel plate, (3) It is a method of obtaining an anti-slip surface by spraying aggregate. That is, the troublesome and costly process of applying the primer can be omitted, and yet a non-slip surface having long-term durability can be obtained by firmly bonding to the steel surface.
[0039]
The anti-slip layer of the lining plate obtained according to the present invention has high adhesion to the steel plate even without a primer and has elongation, so that it first becomes a coating film on the metal surface of the lining plate to prevent metal deterioration, and In addition, cracking and peeling of the neat layer are less likely to occur, and as a result, long-term adhesion and anti-slip effects can be maintained.

Claims (3)

Without applying a primer to the steel lining plate surface, the solid content is 92 to 100%, the physical properties of the cured product are JIS K-6301, and the Shore D hardness is 60 to 90 and the elongation is 30 to 250%. A two-component room temperature curing type polyurethane resin in the range is directly applied to the surface of the steel sheet , and before the polyurethane resin is cured, 50% by weight or more of those having an average particle size of 0.2 to 2.0 mm are contained. An anti- slip treatment method for a lining board, characterized in that an inorganic aggregate is sprayed on a surface, and the aggregate that is not bonded to the polyurethane resin after the urethane resin is cured is removed. The two-component room temperature curable polyurethane resin has a cured product having a Shore D hardness of 70 to 80 and an elongation of 30 to 60% according to a test method based on JIS K-6301. Item 2. A method for preventing slipping of a lining board according to Item 1.   A lining board treated by the anti-slip treatment method according to claim 1.