JPS58210234A - Building material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to construction materials used as rain gutters, roofing materials, wall materials, valley gutters, and the like.

Generally, when bonding dissimilar materials such as plastic and steel, sufficient adhesive strength is often not achieved. For example, a rain gutter coated with a synthetic resin layer such as hard vinyl chloride resin is made by applying an adhesive such as acrylic resin or epoxy resin to a metal base that is bent into the shape of a gutter. Although it is manufactured by coating with hard vinyl chloride resin, the adhesive strength between the hard vinyl chloride resin layer and the metal substrate is not sufficient. Therefore, when a rain gutter is used for many years, the thermal expansion coefficients of the metal base and the synthetic resin layer are different, and the heat expansion and contraction of the metal base and synthetic resin layer causes them to shift, causing the synthetic resin layer to separate from the metal base. There is a problem of peeling, and there is also a problem that rainwater or the like enters through the peeled part, rusts the internal metal base, and the synthetic resin layer peels off again from there.

The present invention has been made in view of the above points, and it is possible to prevent the synthetic resin layer from peeling off from the metal substrate by improving the adhesiveness between the synthetic resin layer and the metal substrate, and to temporarily prevent the synthetic resin layer from peeling off from the metal substrate. The object of the present invention is to provide a construction material that can suppress rusting of a metal base even if it peels off.

That is, the present invention provides an adhesive layer (
In a construction material in which a synthetic resin layer (3) is bonded to the adhesive layer (2), a metal powder (4) having a greater ionization tendency than the metal component of the metal base (1) is blended into the adhesive layer (2), and the metal The above object is achieved by a construction material characterized in that the particle size of at least a part of the powder (4) is larger than the average thickness of the adhesive layer (2).

The present invention will be explained in detail below with reference to Examples. The metal substrate used in the present invention +1> is not limited in any way, but
For example, a steel plate, a galvanized steel plate, a tin-plated steel plate, a stainless steel plate, etc. can be used, and the shape of the metal substrate (1) may be a plate shape or a pipe shape. An adhesive containing metal powder (4) is applied to all the inner and outer surfaces of this metal base +i+ to form an adhesive layer (2), and the surface of the adhesive layer (2) is further coated with a synthetic resin material. This is used to produce building materials. The type of adhesive is not limited as long as it has adhesive ability to the metal substrates tl) to be bonded. However, the following fats are used as adhesives from the viewpoint that the adhesive force is not reduced much even when the metal powder (4) is mixed. Hisphenol type Evo medium resin, Reil type phenol resin, Novolac type phenol Jugetsu, Lathyral cil 11 effect, Acrylic resin; Reactive vinyl chloride resin (for example, combination of vinyl chloride and vinyl acetate) A copolymer with a relatively low degree of polymerization in which a carboxyl group is introduced), a urethane-based resin. In addition, when manufacturing products such as rain gutters as shown in Figure 1 by coating steel plates with vinyl chloride resin, especially non-plastic hard vinyl chloride resin, modified acrylic resin (molecular Methyl methacrylate 7mer containing reactive functional groups such as acid group, hydroxyl group, amide group, amide/methyl group, Ebono group, Shidoro group, etc. is converted into methyl methacrylate 17 group. It is preferable to use a copolymerized compound in a proportion of 1150/-1/100 mole. This resin has excellent adhesion to both steel plates and vinyl chloride resin. The metal powder (4) having a larger ionization tendency than the metal components of the metal materials to be joined is selected from the metal powders listed below depending on the metal components of the metal substrates (1) to be joined. Ai, Zn eMn
+Powder of Cr, Mo, T1, etc. Such metal powder (4) is preferably in the form of a fine powder, and preferably has a particle size of 2/-6μ. The most preferable one is 8/-4μ. If the particle size is smaller than 2μ, when dispersed in the adhesive (base ingredient) in A (I), the particles will not be dispersed into single particles and a good adhesive coating will not be obtained due to agglomeration of the particles. The rusting effect is also not very effective.Also, when the particle size becomes larger than 6μ, the particles tend to separate from the adhesive force and the adhesive strength tends to decrease.Such metal powder (4μ) ) is the amount of metal powder (4)!
It is preferable to set the amount to be 5 to 20 times that of the adhesive (base resin) on a percussion basis. Most preferred is 10-15 times. This is because if the blending amount is less than 5 times, conductivity will not occur and a rubanic rust prevention effect cannot be expected, and if the blending amount exceeds 20 times, the adhesive strength of the adhesive tends to decrease significantly. Among the metal powders (4), ZN powder in particular can be used regardless of the f1@ of the metal materials to be joined.

Its antirust effect is also remarkable. Zn powder exhibits a sufficient rust-preventing effect even when it is in the form of particles, but the most preferable one is in the form of scales. The scale-like ones are 1.5-2μ thick.
A diameter of 6/-12μ is particularly preferable from the viewpoint of effectiveness. Furthermore, the adhesive of this invention is as described above! It is produced by blending the metal powder (4) with M fat, and further blending a curing agent, a number-settling prevention agent, etc. as necessary. Note that it is also within the scope of the present invention to use not only the metal powder (4) alone but also a compound such as an oxide or chloride of the same metal as the metal powder (4) as an auxiliary agent. In this way, the adhesive containing the metal powder (4) is applied to the surface of the metal base il) and cured, but at this time, the metal mixed in the cured adhesive layer (2) From this point of view, the average thickness of the adhesive layer (2) is preferably about 8 μm.

The construction material thus formed is formed into a plate shape or a J-shaped shape and is used for rain, roofing materials, wall materials, valley gutters, etc. When the building material is installed and used outdoors, the metal base 11) and the synthetic resin layer (3) covering the metal base (1) have different thermal expansion numbers of 4fpN, so each may change due to changes in outside temperature. repeats expansion and contraction, causing lateral displacement between the metal base (1) and the synthetic resin layer (3).
) of the average i1 of the adhesive layer (2)
% thickness, a part of the metal powder (4) will penetrate from the adhesive layer (2) into the synthetic resin layer (3) as shown in Figure 2, resulting in a so-called anchor effect. The adhesive layer (2) and the synthetic resin layer (3) can be firmly bonded together, and since the interface between the adhesive layer (2) and the synthetic resin layer (3) comes into contact with unevenness, the adhesion area can be reduced. Therefore, the adhesive strength of the synthetic resin layer (3) can be improved and the synthetic resin layer (3) can be prevented from peeling off from the metal substrate +1+. Furthermore, Fig. 8 (
a) As shown in (b), the tip of the metal powder (4) on the synthetic resin layer (8) side moves from Fig. 8 (a) to (b) as the synthetic resin layer (3) expands and contracts. The ability to dry and deform is [1], and the relative displacement caused by the difference in thermal expansion coefficient between the synthetic resin layer (3) and the metal base (1) can be corrected by applying the metal powder (4) inside the adhesive layer (2). It can be buffered by dispersing it in the air. Furthermore, even if the synthetic resin layer (3) cracks or peels off due to long-term use,
The adhesive layer (2) contains a metal powder (4) that has a higher ionization tendency than the metal component of the metal substrate (1) to be bonded, so it can exhibit a rust-preventing effect. be.

As described above, the present invention provides a building material in which a synthetic resin layer is bonded to the surface of a metal base via an adhesive layer, in which a metal powder is blended into the adhesive layer, and at least part of the particle size of the metal powder is is larger than the average thickness of the adhesive layer, so
Part of the metal powder dispersed in the adhesive layer enters the synthetic resin layer, so the synthetic resin layer and adhesive layer can be bonded over a large bonding area, and the anchoring effect of the metal powder allows the synthetic resin layer to be firmly attached to the metal. Can be adhered to the substrate,
In addition, the metal powder blended into the adhesive layer absorbs the relative displacement caused by the difference in thermal expansion coefficient between the synthetic resin layer and the metal base, thereby preventing the synthetic resin layer from peeling off from the metal layer. Furthermore, since it contains a metal powder with a high ionization tendency, it has a rust-preventing effect. By blending the metal powder in the adhesive layer, the adhesiveness of the synthetic resin layer and the metal can be improved. This allows the base to be rust-proofed at the same time.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a building material according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the same, and FIGS. 8(a) and 8(b) are explanatory views of the same. (1) is a metal base, (2) is an adhesive layer, (3) is a synthetic resin layer, and (4) is a metal powder. Agent Patent Attorney Ishi 1) Chief 7 Figure 1 Figure 3 (0) (b)

Claims (1)

[Claims] (1) In a construction material in which a synthetic resin layer is bonded to the surface of a metal substrate via an adhesive layer, a metal powder having a greater ionization tendency than the metal component of the metal substrate is blended into the adhesive layer, and at least A construction material characterized in that the particle size of some of the particles is larger than the average thickness of an adhesive layer.