JP2599225B2 - Synthetic resin coating material, synthetic resin coated hydrated cured product, and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin coating material and a hydrated cured product having the surface coated with the coating material. Further, the present invention relates to a method for producing a hydrated cured product coated with the coating material.

[0002]

2. Description of the Related Art Conventionally, it has been widely practiced to cover the surface of a concrete with a synthetic resin paint to make the surface decorative or to improve the durability. However, it has been widely demanded in various fields that the surface coating treatment of a hydrated cured product such as concrete by applying a preformed synthetic resin film or sheet has been performed. In practice, it has been extremely difficult in practice due to the durability of the coating material and the like, and has not been practiced in general. The reasons can be summarized mainly in the following three points.

[0003] First, a hydrated cured product such as concrete is porous in nature, and when it is coated with the above-mentioned synthetic resin coating material by an ordinary means such as an adhesive, the hydrated product becomes hydrated. Adhesion was significantly reduced due to bubbles on the surface of the cured product. In order to solve this problem, it is necessary to previously treat the surface of the cured product with a sealer or the like. However, such a process requires a lot of time to smooth the surface, and is costly. It was difficult to make this practical.

[0004] Second, the hydrated cured product usually contains a large amount of water even after it has been formed into a final product, and it is not possible to perform the above-mentioned coating while keeping it as it is. Was dried to reduce its water content. But,
This process naturally requires a lot of trouble, and even if such a drying process is performed and the water content is set to a predetermined value,
Thereafter, there has been a problem that the moisture management for keeping this in a dry state becomes very complicated.

[0005] Third, even with a synthetic resin coating material coated through the complicated and time-consuming steps as described above, its adhesive strength has never been satisfactory. This is because pretreatment such as removal of moisture is actually difficult and often not sufficient, so that the surface of the coating material tends to swell due to the expansion pressure of water vapor or the like inside the hydrated and cured product. there were.

[0006]

SUMMARY OF THE INVENTION The present invention aims to develop a novel synthetic resin coating material and thereby obtain a hydrated cured product in which the surface of the synthetic resin coating material is firmly coated. It is an object of the present invention to obtain a method by which a hydrated cured product can be easily produced.

[0007]

SUMMARY OF THE INVENTION The present invention provides a film or sheet of a synthetic resin, a resin layer in which a resin having good adhesiveness to the film or sheet is laminated, and Solid particles as a reinforcing material embedded therein, and solid particles as a binder partially embedded in the resin layer and other portions projecting from the surface of the resin layer and exposed. A synthetic resin covering material (claim 1), a film or sheet of synthetic resin, and a resin layer obtained by laminating a resin having good adhesion to the film or sheet. A solid particulate material as a reinforcing material embedded in the resin layer, and a bonding material partially embedded in the resin layer and other portions protruding and exposed from the surface of the resin layer The synthetic resin coating material consisting of solid particles as Resin-coated hydrated cured product (Claim 2) and a film or sheet of a synthetic resin, and a resin layer obtained by laminating a resin having good adhesion to the film or sheet. And a solid particulate material as a reinforcing material embedded in the resin layer, and a portion embedded in the resin layer and another portion protruding from the surface of the resin layer and exposed. A synthetic resin coating material comprising a solid powder as a binder is coated with a synthetic resin film or sheet.
Is temporarily fixed in the mold with the mold facing the inner surface of the mold, filled with a hydraulic kneaded material, and then cured. The present invention provides a method for producing a hydrated cured product coated with a synthetic resin (claim 3).

Hereinafter, these inventions will be described. The invention of claim 1 is an invention of a synthetic resin coating material as shown in FIG. As shown in FIG. 1, reference numeral 2 denotes the entirety of the synthetic resin coating material, and 1 denotes a synthetic resin film or sheet therein.
It is. This film or sheet 1 preferably has a thickness of 10 μm or more in consideration of the abrasion resistance of the surface layer. The film or sheet may be a laminate. The synthetic resin used herein is preferably a resin having excellent weather resistance, such as a vinyl chloride resin or an acrylic resin, but may be an acrylic silicone resin, a fluororesin, or the like. One surface of the film or sheet 1 is coated with a resin having good adhesion to the film, for example, an epoxy resin, an acrylic resin, a polyurethane resin, or the like, and a resin layer 3 is formed thereon. The thickness of the resin layer 3 laminated here is preferably, for example, 0.1 to 2 mm. Then, powder particles are embedded in the resin layer 3, and these serve as a reinforcing material for the resin layer 3. Some of these powders are mixed so that a part thereof is embedded in the resin layer 3 and the other part projects from the surface of the resin layer 3 and is exposed.

The powder particles embedded in the resin layer 3 include solid inorganic powder particles such as cement semi-hardened particles, cement clinker, blast furnace slag, silica sand, acrylic resin, vinyl chloride resin, and polystyrene resin. And other organic powders.

The particle size of the solid powder is preferably 0.15 to 2 mm. When the particle size of the solid particles is less than the lower limit, the effect of bonding with the hydrated cured body adhered thereto through the solid particles is small, and when the particle size exceeds the upper limit. It is not preferable because there are many gaps between the solid particles and the adhesive strength is not increased.

These solid powders may be subjected to a surface treatment such as a silane treatment or a plasma treatment, if necessary, to enhance the adhesiveness with the resin and the hydrated cured product. As an example of the method of manufacturing the above-mentioned synthetic resin coating material, a melted epoxy resin, for example, having a thickness of 1 mm is applied on a synthetic resin sheet as a resin having good adhesion to the synthetic resin sheet. When the applied resin is still sufficiently fluid, solid particles are sprayed on the surface, and these solid particles are embedded in the resin layer by sedimentation. The part of the solid particles is embedded in the resin layer, and another part of the particles protrudes from the surface of the resin layer to be exposed.

According to the invention of claim 2, as shown in FIG. 2, the synthetic resin coating material 2 of claim 1 is
It is a synthetic resin-coated hydrated cured product coated so as to match a part of the solid granular material with the exposed surface. Thereby, a synthetic resin-coated hydrated cured product in which the synthetic resin-coated material is firmly coated on the hydrated cured product can be obtained.

According to a third aspect of the present invention, there is provided a method of manufacturing a hydrated cured product of a synthetic resin using the synthetic resin coating material according to the first aspect, wherein the synthetic resin coating material is inverted using a mold. This coats the surface of the hydrated cured product.

That is, a synthetic resin coating material is previously placed on the inner surface of the mold, and its film or sheet surface is directed toward the inner surface of the mold.
Temporarily fix with an adhesive tape. A hydraulic slurry and a hydraulic kneaded material are filled in such a mold frame and cured.
Thereby, the synthetic resin coating material is fixed integrally with the hydrated cured body in the mold. Thereafter, the mold is released, whereby the synthetic resin coating material is inverted from the mold frame and the surface of the hydrated cured product is inversely coated to obtain a product. The method for producing the hydrated cured product here may be the same as in the conventional method. Hereinafter, the present invention will be further described with reference to experimental examples.

(Experimental Example) In this experiment, a resin film was coated on a concrete molded body via a resin layer in which powder and granules were embedded.
It is a test that the blister of the coating layer is avoided.
The test specimen was as follows.

Acrylic silicone resin and ceramiton (trade name of Fujikura Kasei Co., Ltd.) were applied on a polyester film, emblet (trade name of Unitika) having a size of 10 × 10 cm (100 cm ² ) and thickness of 75 μm. Cured at 7 ° C for 7 days. After curing, the thickness of acrylic silicon is about 100μ.
m. An epoxy resin, PM210 (trade name of Cemedine) is applied on this acrylic silicon film to form
Cured at 0 ° C. for 7 days and used as an epoxy resin first layer.
In this case, the thickness of the epoxy resin first layer after curing was varied as shown in Table 1.

Further, the same epoxy resin as described above is applied again to the cured epoxy resin surface. When the epoxy resin is not yet cured, silica sand having a particle size of 0.6 to 1.2 mm is weighed in an average of 1 g from an upper surface of 20 to 50 cm. / Cm ² and 7 at 20 ° C
After curing, this was used as the epoxy resin second layer.

Thereafter, the surface was brushed to remove silica sand remaining on the surface. As shown in Table 1, the thickness of the epoxy resin after curing was all unified so that the total of the first layer and the second layer was about 1000 μm in a state where the silica sand was not sprayed.

Next, this was placed in a mold, and fresh concrete was poured from above, followed by steam curing at 70 ° C. for 3 hours. The thickness of the concrete was 30 mm.
After demolding, peel off the polyester film of the molded body,
A synthetic resin-coated concrete of a test body was obtained.

The specimen of the comparative example has the same size as the above-mentioned specimen, and is coated with epoxy resin paint PM210 on the upper surface of the concrete dried at 20 ° C. for 14 days.
Cured at 0 ° C. for 7 days. The film thickness after curing was 1 mm. Acrylic silicone and ceramite are further painted on this,
After curing at 20 ° C. for 7 days, the film thickness of the cured acrylic silicon was about 100 μm. The test is a hot water immersion test,
Each specimen was immersed in hot water at 70 ° C. for a predetermined time, and the number (number) of blisters generated was determined. The results were as shown in Table 1.

[0021]

[Table 1] As shown in Table 1, as the thickness of the second layer of the epoxy resin in which the particles or fibers are embedded is larger, the occurrence of swelling is smaller and it is recognized that the epoxy resin is firmly bonded.

[0022]

EXAMPLE An acrylic resin film having a thickness of 35 .mu.m was fixed on a plate with double-sided tape. On this film, an epoxy resin, PM210 having good adhesiveness to this film, was applied so as to have a dry film thickness of about 1 mm. Immediately after the application, before the resin has hardened, silica sand having a particle size of 0.6 to 1.2 mm and an average particle size of 1 mm is further placed on the g / cm ^2.
The spray was spread evenly over the entire surface from a height of 20 to 50 cm. Next, this was cured at 20 ° C. for 7 days to cure the epoxy resin spontaneously, and the epoxy resin surface was brushed to remove unbonded silica sand. As a result, an acrylic resin film was firmly adhered to one side of the cured epoxy resin, and a synthetic resin coating material was obtained in which silica sand was projected and exposed from the resin surface on the other side.

This synthetic resin coating material was fixed to the bottom of a separately prepared mold using a double-sided tape so that the synthetic resin film faced the inner surface of the mold. Next, fresh concrete was poured into this, compacted by vibration, steam-cured at a maximum temperature of 70 ° C. for 3 hours, and demolded the next day.

As a result, a beautiful synthetic resin-coated cured product having a synthetic resin film smoothly and firmly adhered to the upper surface was obtained. Tests such as the following accelerated weather resistance test, abrasion resistance test and hot water immersion test were performed on the cured synthetic resin-coated concrete to examine its durability and physical properties of the coating film. Table 2 shows the results. The same table also shows the test results for the comparative examples.

The test piece used in the comparative example was prepared by coating an epoxy resin PM2 on the surface of a concrete dried at 20 ° C. for 14 days.
10 was coated with a spatula and surface-treated, and this was cured at 20 ° C. for 7 days. Next, an acrylic resin paint, toamethaclone (trade name of Toa Paint Co., Ltd.) was spray-painted on the painted surface, and this was further cured at 20 ° C. for 7 days.
The film thickness after curing was about 35 μm. The size of the specimen is
All were the same as the experimental examples.

[0026]

[Table 2]

[0027] Accelerated weathering test: After irradiating for 2000 hours using a Sancia Inweometer, it was visually judged. Abrasion resistance test: 30 kg of sand (particle size: 0.4 to 0.8 mm) was dropped freely at a rate of 200 g / min from a height of 200 cm onto a test piece surface oriented at an angle of 45 °, and then visually observed. Judged. Hot water immersion test: After immersion in hot water at 70 ° C. for 14 days, the number (number) of blisters was determined.

[0028]

As described above, according to the present invention, a synthetic resin-coated cured product having high weather resistance and durability can be easily produced without performing a complicated pretreatment, and the synthetic resin-coated water can be easily prepared. The cured product can avoid swelling of the synthetic resin coating for a long period of time.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a cross section of a synthetic resin coating material according to one embodiment of the present invention.

FIG. 2 is an explanatory view showing a cross section of a hydrated cured product coated with a synthetic resin according to another embodiment.

[Explanation of symbols]

1 ... Synthetic resin film, 2 ... Synthetic resin coating material, 3 ...
... Synthetic resin laminate, 4 ... Powder, 5 ... Concrete
G.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideo Ogawa 2-13-14 Minamikasai, Edogawa-ku, Tokyo Onoda Cement Kasai Ryo No. 108 Room (72) Inventor Noboru Miyazaki 1-5-13 Fukuei, Ichikawa-shi, Ichikawa, Chiba・ Room Miwa 205 (56) References JP-A-57-43865 (JP, A)

Claims (3)

(57) [Claims] 1. A film or sheet of a synthetic resin, a resin layer in which a resin having good adhesiveness to the film or sheet is laminated, and a solid material as a reinforcing material embedded in the resin layer. And a solid particle as a bonding material, a part of which is embedded in the resin layer and the other part of the resin layer protrudes from the surface of the resin layer and is exposed. Synthetic resin covering material. 2. A film or sheet of a synthetic resin, a resin layer laminated with a resin having good adhesion to the film or sheet, and a solid material as a reinforcing material embedded in the resin layer. Synthetic resin coating material comprising: a powdery material of the formula (I); and a solid powdery material as a bonding material, a part of which is embedded in the resin layer and the other part protrudes from the surface of the resin layer and is exposed. A hydrated cured product coated with a synthetic resin, with the exposed surface of the powder and granules facing inside. 3. A film or sheet of a synthetic resin, a resin layer obtained by laminating a resin having good adhesiveness to the film or sheet, and a solid material as a reinforcing material embedded in the resin layer. Synthetic resin coating material comprising: a powdery material of the formula (I); and a solid powdery material as a bonding material, a part of which is embedded in the resin layer and the other part protrudes from the surface of the resin layer and is exposed. Is temporarily fixed in a mold with a synthetic resin film or sheet facing the inner surface of the mold, filled with a hydraulic kneaded material, cured, and then removed from the mold to form a synthetic resin coating material. A hydrated cured body coated with a synthetic resin, which is obtained by inverting a cured product from a mold frame.