JP2007186658A - Primer for elastic pavement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a primer for elastic pavements, which can well ensure adhesiveness between an asphalt-based elastic pavement using an asphalt-based binder and concrete used as a ground. <P>SOLUTION: This primer for the elastic pavements, used for adhering an asphalt-based elastic pavement containing asphalt as a binder to a ground, is characterized by comprising an epoxy resin comprising at least a main agent and a curing agent. Bisphenol A or bisphenol F may suitably be used as the main agent, and a modified aliphatic polyamine-based curing agent may suitably be used as the curing agent. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an elastic pavement primer (hereinafter also simply referred to as “primer”), and more particularly to an elastic pavement primer used for adhesion between an asphalt elastic pavement and a ground surface.

  Conventionally, a low noise elastic pavement using a curable resin such as urethane or epoxy as a binder is known as a method of using vulcanized rubber in the form of powder or chips. In addition, elastic pavements in which rubber chips are mixed with these binders and press-molded are used on sidewalks, playgrounds, roadways, and the like.

  These elastic pavements using rubber chips have excellent effects such as shock absorption during walking and safety during falls due to the elasticity of the rubber chips, and since there are voids inside, in addition to drainage and breathability Therefore, it is also attracting attention as a functional elastic pavement material for reducing traffic noise in urban areas because it is effective in reducing noise generated on tires and road surfaces.

  However, when a curable resin such as urethane is used as a binder, there is a problem in that when the applied pavement is recycled, it cannot be reused by heating or the like like asphalt. In addition, because curing is slow at room temperature, it takes about 1 to 2 days for curing time, and there is a problem that traffic must be restricted during that time. It was difficult and had economic problems.

In contrast, in the present applicant, instead of conventional curable binders such as urethane and epoxy, various investigations have been conducted on elastic pavement using asphalt that can be recycled at low cost as a binder, Proposals have been made on elastic pavement materials using ethylene vinyl acetate copolymer (EVA), which is a thermoplastic resin, as a binder together with asphalt (for example, Patent Documents 1 and 2).
Japanese Patent Application No. 2004-38513 Japanese Patent Application No. 2005-004509

  As shown in Patent Documents 1 and 2 and the like, it is possible to solve the above-described problems such as curing time and recyclability by using a cooling and curing type asphalt binder. However, the asphalt-based elastic pavement has a problem of low adhesiveness with concrete as a base, and a technique for obtaining good adhesiveness has been demanded.

  Accordingly, an object of the present invention is to provide a primer for elastic pavement that can ensure good adhesion between the asphalt elastic pavement using the asphalt binder and the concrete as the foundation.

  When a conventional asphalt emulsion was used as a primer for bonding between the asphalt-based elastic pavement and the ground surface, sufficient adhesion could not be obtained. In contrast, as a result of intensive studies, the present inventors have found that by using an epoxy resin as a primer for such asphalt-based elastic pavement, it becomes possible to improve the adhesion between the elastic pavement and the ground. The present invention has been completed.

  That is, the elastic pavement primer of the present invention is an asphalt elastic pavement containing asphalt as a binder, and an elastic pavement primer used for bonding to the ground surface, and is characterized by comprising an epoxy resin containing at least a main agent and a curing agent. It is what.

  In the present invention, bisphenol A or bisphenol F can be suitably used as the main agent, and the epoxy equivalent of the main agent is preferably in the range of 150 to 300 g / eq. In addition, a modified aliphatic polyamine system can be suitably used as the curing agent, and the amine value is preferably in the range of 300 to 500 mgKOH / g. Furthermore, the epoxy resin may contain a plasticizer having an epoxy amount of 3% to 10%.

  According to the primer for elastic pavement of the present invention, the above configuration makes it possible to ensure good adhesion between the asphalt elastic pavement using the asphalt binder and the underlying concrete. It was.

Hereinafter, preferred embodiments of the present invention will be described in detail.
The primer for elastic pavement of the present invention is used for adhesion between an asphalt-based elastic pavement containing asphalt as a binder and a base surface, and consists of an epoxy resin containing at least a main agent and a curing agent.

  When a conventional general asphalt emulsion is used as a primer, adhesion with concrete as a foundation cannot be obtained, but by using an epoxy resin, good adhesion between the asphalt elastic pavement and the foundation surface is obtained. It became possible.

  The epoxy resin used in the present invention is not particularly limited, but those using bisphenol A or bisphenol F as the main agent are preferable, and the epoxy equivalent is preferably in the range of 150 to 300 g / eq. When the epoxy equivalent is too low, the adhesiveness is lowered, and when it is too high, the curing is too fast and the pot life is shortened.

  Moreover, as a hardening | curing agent, it is preferable to use the thing of a modified | denatured aliphatic polyamine type | system | group, and as the amine value, the grade within the range of 300-500 mgKOH / g is suitable. If the amine value is too low, the adhesiveness is lowered, and if it is too high, the curing is too fast and the pot life is shortened.

  Furthermore, the epoxy resin used in the present invention preferably contains a plasticizer. As the plasticizer, an epoxy amount of about 3% to 10% can be suitably used.

The primer for elastic pavement of the present invention is applied to the surface of concrete pavement or the like as a base before applying asphalt elastic pavement by applying an appropriate amount, for example, 200 to 500 ml / m ^2, so that the elastic pavement and the base surface The amount of coating, the coating method, and the like are not particularly limited, and can be performed according to a conventional method.

Hereinafter, the present invention will be described in more detail with reference to examples.
The primer shown in the following Table 1 was applied at 400 ml / m ^{2 on} a concrete pavement surface (300 mm × 300 mm) as a base, and an asphalt-based elastic pavement of φ100 mm × 30 mm was formed on the surface. In this asphalt-based elastic pavement, rubber (particle size 3 to 5 mm) and cinnabar are mixed at 75:25 (volume ratio), and 75% by volume of this mixture and asphalt binder (straight asphalt (25 ° C. penetration 60 ° -80) / ethylene vinyl acetate copolymer (Tosoh Co., Ltd., EVA625) / wax (Nihon Seiki Co., Ltd., FT100) = 20/40/40 (volume ratio)) Using a material prepared by stirring at 180 ° C. for about 20 minutes with a stirrer, a gap of 20% was formed.

  As shown in FIG. 1, the tension | tensile_strength jig | tool 1 was installed in the upper part of the formed elastic pavement, and the adhesive force between the base | substrate 10 and elastic pavement was evaluated by measuring a tensile stress. The results are also shown in Table 1 below. If this adhesive strength is 0.1 MPa or more, it is satisfactory with no practical problem.

＊１）カチオゾールＣＰＥ−４（ニチレキ（株）製）
＊２）主剤：ＥＰ−４５２０Ｓ（旭電化工業（株）製）／硬化剤：ＥＨ−４２５（旭電化工業（株）製）／可塑剤：サンソサイザーＥＰＳ（新日本理化（株）製）＝１００／４０／２０

* 1) Cathizole CPE-4 (Nichireki Co., Ltd.)
* 2) Main agent: EP-4520S (Asahi Denka Kogyo Co., Ltd.) / Curing agent: EH-425 (Asahi Denka Kogyo Co., Ltd.) / Plasticizer: Sanso Sizer EPS (New Nippon Rika Co., Ltd.) = 100/40/20

  As shown in Table 1 above, it was confirmed that a good adhesive force was obtained between the elastic pavement and the ground in the example using an epoxy resin as a primer.

It is a schematic explanatory drawing which shows the measuring method of the tensile stress in an Example.

Explanation of symbols

10 Ground 1 Pulling jig

Claims (6)

  An elastic pavement primer comprising an epoxy resin containing at least a main agent and a curing agent in an asphalt elastic pavement containing asphalt as a binder and an elastic pavement primer used for adhesion to a ground surface.   The primer for elastic paving according to claim 1, wherein the main agent is bisphenol A or bisphenol F.   The primer for elastic paving according to claim 1 or 2, wherein an epoxy equivalent of the main agent is in a range of 150 to 300 g / eq.   The primer for elastic paving according to any one of claims 1 to 3, wherein the curing agent is a modified aliphatic polyamine.   The primer for elastic paving according to any one of claims 1 to 4, wherein the amine value of the curing agent is in the range of 300 to 500 mgKOH / g.   The primer for elastic paving according to any one of claims 1 to 5, wherein the epoxy resin contains a plasticizer having an epoxy amount of 3% to 10%.

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