Waterproofing sheet finishing paint, and waterproofing structure and waterproofing method using the same.

Abstract

To provide a finishing paint suitable for preventing damage from birds, and a waterproof structure and waterproofing method using the same. [Solution] A waterproof sheet finishing paint suitable for preventing damage from birds, a waterproof structure using the same, and a waterproof construction method, wherein the waterproof sheet finishing paint contains a repellent that utilizes the taste of birds.

Description

Technical Field

[0001] The present invention relates to a finishing paint used for protecting a waterproof sheet on a building roof and imparting design properties, and more particularly to a finishing paint suitable for preventing damage by birds. Furthermore, the present invention relates to a waterproof structure and a waterproofing method using this finishing paint.

Background Art

[0002] Synthetic polymer sheets such as vulcanized rubber sheets are laid for waterproofing of building roofs, and a finishing paint is applied from the viewpoints of protecting the waterproof sheet and imparting design properties.

[0003] As a finishing paint for synthetic polymer sheets, an aqueous solvent-based emulsion paint mainly composed of a film-forming resin such as an acrylic resin or an ethylene vinyl acetate resin (EVA) is generally known as described in Japanese Patent No. 5588647 (Patent Document 1). Among synthetic polymer sheets, the color tone of vulcanized rubber sheets is black, and application of a finishing paint is essential from the viewpoints of protecting the sheet and imparting design properties for the landscape.

[0004] In addition, in order to protect the sheet from external factors such as hail, gravel, contact with construction equipment, and bird damage (pecking with the beak), as described in Japanese Patent Application Laid-Open No. 2004-41960 (Patent Document 2), silica sand or the like is added as an aggregate to the paint components in the finishing paint. The principle is that aggregates such as silica sand strengthen the surface of the paint film and improve the impact resistance.

[0005] The environment in which the finishing paint for synthetic polymer sheets is used is outdoors, which is a harsh environment for synthetic polymer sheets and finishing paints, such as the influence of sunlight, rainfall, and snowfall. Under such an environment, the paint film of the paint gradually wears out, and when further deterioration progresses, chalking (powder spraying phenomenon), cracking, and peeling occur.

[0006] Furthermore, synthetic polymer sheets, especially vulcanized rubber sheets, are known to be susceptible to damage from birds, particularly crows, which can create holes in the sheets, cause gaps at the joints between sheets, or result in damage from vandalism. Damage to the sheets means that rainwater can seep in through these damaged areas, resulting in a loss of waterproofing function. If water leaks occur, it can cause significant damage by corroding fixtures and other components. It also creates an unpleasant living space for residents. Therefore, finishing paint is of crucial importance in protecting the waterproof sheets from external factors.

[0007] As aggregate-containing emulsion paints deteriorate, the aggregate within the paint film detaches. As a result, the paint loses its robust function and resistance to bird damage. Therefore, this method cannot be considered a true bird damage prevention measure. In emulsion paints containing aggregate, high-density aggregates such as silica sand are added to the paint components beforehand at the production plant. These aggregates gradually settle in the paint, and then the paint components adhere to the aggregates, forming clumps. If these clumps continue to increase, it is undesirable from a product accuracy standpoint. These clumps prevent the aggregate from being uniformly dispersed on the painted surface, resulting in uneven coating and inconsistencies in the aggregate on the finished surface.

[0008] As a bird-repellent coating, as described in Japanese Patent Publication No. 2018-39753 (Patent Document 3), coatings incorporating crown-of-thorns starfish extract or other substances that utilize the birds' sense of smell have been used. However, it is said that crows, which cause bird damage to synthetic polymer sheets, have a weak sense of smell. Furthermore, while this coating is suitable for hard materials such as concrete and plywood, it is unsuitable for flexible materials such as synthetic polymer sheets or materials with stretch properties due to poor adhesion and stretch-following properties. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Patent No. 5588647 [Patent Document 2] Japanese Patent Publication No. 2004-41960 [Patent Document 3] Japanese Patent Publication No. 2018-39753 [Overview of the Initiative] [Problems that the invention aims to solve]

[0010] As mentioned above, there are no known finishing coatings for conventional waterproof sheets that are suitable for preventing damage from birds. Therefore, the present invention aims to provide a finishing paint suitable for preventing damage caused by birds. [Means for solving the problem]

[0011] The finishing paint of the present invention is a finishing paint to which a repellent that utilizes a taste that birds dislike has been added. In other words, the finishing paint of the present invention is the following type of finishing paint. (1) A finishing paint for waterproof sheets, comprising a repellent that utilizes the taste of birds. (2) The finishing paint according to (1), comprising a fast-acting repellent and a long-lasting repellent as the repellent. (3) The finishing paint according to (2), wherein the fast-acting repellent is pyrogallol or terpinolene and the long-lasting repellent is caffeine. (4) The finishing paint is the finishing paint according to any one of (1) to (3), comprising ethylene vinyl acetate resin and an organic solvent. (5) The finishing paint according to any one of (1) to (4) above, wherein the finishing paint contains aggregate. (6) The finishing paint according to (5), wherein the aggregate is silica sand. (7) The waterproof sheet is a vulcanized rubber sheet. The finishing paint described in any of (1) to (6). Furthermore, the waterproof structure of the invention is as follows: (8) A waterproof structure comprising a coating of a finishing paint on the surface of a waterproof sheet, wherein the coating is a coating of the finishing paint described in any of (1) to (7). (9) The waterproof sheet is laid on the heat insulating material, and is the waterproof structure described in (8). Further, the waterproof method of the present invention is as follows. (10) A waterproof method for constructing a waterproof structure having a coating film of a finishing paint on the surface of the waterproof sheet, wherein the finishing paint described in any of (1) to (7) is applied to the surface of the waterproof sheet. (11) The waterproof method described in (10), wherein an aggregate is mixed when applying the finishing paint, and the finishing paint described in (5) is applied. (12) The waterproof method described in (11), wherein the aggregate is silica sand. (13) The waterproof method described in any of (10) to (12), wherein the waterproof sheet is laid on the heat insulating material.

Effect of the Invention

[0012] Since the finishing paint of the present invention contains a repellent having a taste that birds dislike, it can effectively prevent birds from biting or playing with the finishing paint. Further, by including an aggregate, birds are afraid of damaging their beaks, so that it is possible to more effectively prevent birds from biting or playing with the finishing paint. In particular, by mixing the aggregate when applying the finishing paint, the aggregate can be uniformly mixed to the surface of the finishing paint, and by exerting the repellent effect of the aggregate, it is possible to more effectively prevent birds from biting or playing with the finishing paint. By using such a finishing paint, it is possible to provide a waterproof structure that can more effectively prevent birds from biting or playing with the finishing paint. In particular, by mixing the aggregate when applying the finishing paint, it is possible to uniformly mix the aggregate to the surface of the finishing paint and more effectively exert the repellent effect of the aggregate, and thus it is possible to provide a waterproof method.

Brief Description of the Drawings

[0013] [Figure 1] It is an explanatory drawing showing the waterproof structure of the present invention. [Figure 2] It is an explanatory diagram showing the waterproof structure of the present invention. [Figure 3] It is an explanatory diagram showing the waterproof structure of the present invention. [Figure 4] It is an explanatory diagram showing the waterproof structure of the present invention.

Embodiments for Carrying Out the Invention

[0014] The finishing paint of the present invention is preferably a paint having synthetic resins such as EVA resin and synthetic rubber as main components, using inorganic pigments such as aluminum paste, silica, titanium oxide, etc. as pigments, and using toluene, xylene, etc. as solvents. The finishing paint may contain aggregates such as cement and silica sand.

[0015] The finishing paint of the present invention contains a repellent utilizing the taste of birds. That is, a bitter component that birds dislike is incorporated as a repellent. A bitter component that does not interfere with the coating film material of the finishing paint is selected. As the mechanism of the repellent, it is designed such that the bitter component that birds dislike in the paint components is gradually eluted by rainfall or the like. In addition, from the viewpoint of bird protection, those with strong toxicity and those that do not affect environmental pollution are selected. It is preferable to add two types of agents as repellents. One is an immediate-acting one such as pyrogallol that elutes immediately by rainwater and makes birds feel bitterness, or terpinolene that does not elute immediately but makes birds feel bitterness, and the other is a persistent repellent such as caffeine that elutes slowly by rainwater and aims at a long-term repellent effect. The repellent is preferably added at a ratio of 0.01 to 0.1 per weight with respect to Paint 1. It is more preferable to add the repellent at a ratio of 0.015 to 0.02 per weight with respect to Paint 1. Here, Paint 1 refers to the weight that does not contain aggregates.

[0016] As mentioned above, this paint may use aggregate, but in this case, it is preferable to mix the aggregate into the paint at the construction site immediately before application. By mixing the aggregate into the paint at the construction site immediately before application, unlike aggregate-containing emulsion paints where the aggregate settles and forms clumps in the container, the aggregate is uniformly dispersed, resulting in a smooth and uniform finish. Therefore, the repellent effect of the aggregate against birds is ensured. When mixing, it is preferable to mix aggregate at a ratio of 0.5 to 0.8 parts aggregate per unit weight of paint. It is even more preferable to use a ratio of approximately 0.6 parts aggregate per unit weight of paint. Here, "paint 1" refers to the weight without aggregate.

[0017] To apply the paint, tools such as roller brushes or other brushes can be used. 2 The amount applied in one application should be 0.2 kg or more, preferably in the range of 0.2 to 0.4 kg. Furthermore, when aggregate is mixed with the paint, the amount applied in one application should be 0.45 kg or more, preferably in the range of 0.45 to 0.65 kg. In the finishing paint of the present invention, even if the aggregate of the paint film falls off due to aging, the repellent effect can be maintained due to the chemical elements of the repellent.

[0018] The aforementioned paint has good compatibility with synthetic polymer sheets such as vulcanized rubber sheets (JIS K 5600 5-6:1999 cross-cut method), and the paint film follows the sheet's elongation of more than 300% without cracking, demonstrating excellent elongation characteristics. It also has excellent durability and weather resistance. [Examples]

[0019] [Experimental Example 1] The following experiment was conducted to confirm the repellent effect of the repellent used in this invention. The following repellents were used as deterrents. Repellent 1: Pyrogallol (manufactured by MP Gokyo Food & Chemical Co., Ltd.) Repellent 2: Caffeine (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) These two types of repellents were mixed into minced pork meatballs, and their repellent effect was checked to see if crows disliked them. The specific test method involved preparing 22 spherical balls of minced pork, approximately 5 cm in diameter, mixed with repellent 1; 20 balls mixed with repellent 2; and 20 blank balls without repellent 1 or 2. These were then placed outdoors and observed for comparison. The results are shown in Table 1 below.

[0020] [Table 1]

[0021] As shown in Table 1, of the 20 meatballs that were not mixed with repellent, 9 were eaten the next day and 11 were eaten four days later, meaning all 20 were eaten. In contrast, of the 22 meatballs mixed with repellent 1, 3 were eaten the next day, but all remained after four days. Also, of the 20 meatballs mixed with repellent 2, 4 were eaten the next day, but only 2 were eaten four days later, leaving 14 remaining. Thus, the repellent effect of repellents 1 and 2 was confirmed, as well as the immediate effect of repellent 1 and the sustained effect of repellent 2.

[0022] [Experimental Example 2] To confirm the repellent effect of the fast-acting repellent used in this invention, which does not immediately dissolve in rainwater, the following experiment was conducted. The following repellents were used as deterrents. Repellent 3: Terpinolene (manufactured by Nippon Terpene Chemical Co., Ltd.) This repellent was mixed into minced pork meatballs, and its repellent effect was checked to see if crows disliked it. The specific test method involved preparing eight spherical balls of minced pork, approximately 5 cm in diameter, mixed with repellent 3, and eight blank balls without repellent 3. These were placed outdoors and observed for comparison. The results are shown in Table 2 below.

[0023] [Table 2]

[0024] As shown in Table 2, all eight meatballs that were not mixed with repellent 3 were eaten the next day. In contrast, four of the eight meatballs mixed with repellent 3 were eaten the next day, but all remained after four days. Thus, the repellent effect and immediate action of repellent 3 were confirmed.

[0025] Next, as Examples 1 to 5 and Comparative Examples 1 and 2 below, a finishing paint was prepared using the following EVA resin system as the main component, aluminum paste as the pigment, toluene as the organic solvent, pyrogallol and caffeine as repellents, and silica sand as the aggregate, with the following composition. Resin: EVA resin (Evaflex FV40, manufactured by Mitsui Dow Polychemical Co., Ltd.) Pigment: Aluminum paste (manufactured by Toyo Aluminum Co., Ltd., FZ-T30b) Solvent: Toluene Repellent 1: Pyrogallol (manufactured by Sumitomo Forma Food & Chemical Co., Ltd.) Repellent 2: Caffeine (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) Aggregate: Silica sand (No. 7 & 8) (Silica sand manufactured by JFE Mineral Co., Ltd.)

[0026] [Example 1] Resin EVA 23.3% Pigment, aluminum paste, 18.3% Solvent: Toluene 56.8% Repellent 1: Pyrogallol 1.6% Total 100.0%

[0027] [Example 2] Resin EVA 23.3% Pigment, aluminum paste, 18.3% Solvent: Toluene 56.8% Repellent 1: Caffeine 1.6% Total 100.0%

[0028] [Example 3] Resin EVA 23.3% Pigment, aluminum paste, 18.3% Solvent: Toluene 56.8% Repellent 1: Pyrogallol 0.8% Repellent 2: Caffeine 0.8% Total 100.0%

[0029] [Example 4] Resin EVA 14.0% Pigment, aluminum paste, 11.0% Solvent: Toluene 34.0% Repellent 1: Pyrogallol 1.0% Aggregate: Silica sand 40.0% Total 100.0%

[0030] [Example 5] Resin EVA 14.0% Pigment, aluminum paste, 11.0% Solvent: Toluene 34.0% Repellent 1: Pyrogallol 0.5% Repellent 2: Caffeine 0.5% Aggregate: Silica sand 40.0% Total 100.0%

[0031] [Comparative Example 1] Resin EVA 23.7% Pigment, aluminum paste, 18.6% Solvent: Toluene 57.7% Total 100.0%

[0032] [Comparative Example 2] Resin EVA 14.1% Pigment, aluminum paste, 11.0% Solvent: Toluene 34.0% Aggregate: Silica sand 40.9% Total 100.0%

[0033] The waterproof structure was constructed using the following steps with the respective finishing paints described in Examples 1 to 5 and Comparative Examples 1 and 2. As shown in Figures 1 and 2, a waterproof structure was constructed by applying the finish coatings 3 of Examples 1 to 5 and Comparative Examples 1 and 2 to the surface of a waterproof sheet 2 made of vulcanized rubber sheet laid on a base RC indicated by 1 in the figure, using a roller brush. Figure 1 shows the waterproof structure using the finish coatings of Examples 1 to 3 and Comparative Example 1, and Figure 2 shows the waterproof structure using the finish coatings of Examples 4, 5 and Comparative Example 2. In the figure, 4 indicates the aggregate of the finish coating. The application amount of the finish coating for Examples 1 to 3 and Comparative Example 1 is 1 m 2 The application rate was 0.3 kg per unit. The application rate of the finishing paint in Examples 4 and 5 and Comparative Example 2 was 1 m². 2 The application rate was 0.5 kg per person. In Examples 4 and 5, the finishing paint was mixed and applied immediately before applying the aggregate. In Comparative Example 2, the finishing paint used was one in which the aggregate was pre-mixed.

[0034] Next, as shown in Figures 3 and 4, after laying a foamed plastic insulation material 5 on the RC base indicated by 1 in the figures, the waterproofing structure was constructed by applying the respective finishing paints 3 of Examples 1 to 5 and Comparative Examples 1 and 2 to the surface of the waterproof sheet 2 made of vulcanized rubber sheet laid on top of the insulation material 5 using a roller brush. Figure 3 shows the waterproofing structure using the finishing paints of Examples 1 to 3 and Comparative Example 1, and Figure 4 shows the waterproofing structure using the finishing paints of Examples 4, 5 and Comparative Example 2. In the figures, 4 indicates the aggregate of the finishing paint. The application amount of the finishing paint for Examples 1 to 3 and Comparative Example 1 is 1 m 2 The application rate was 0.3 kg per unit. The application rate of the finishing paint in Examples 4 and 5 and Comparative Example 2 was 1 m². 2 The application rate was 0.5 kg per person.

[0035] As described above, when the coating films of the finishing paints in Examples 1 to 5 and Comparative Examples 1 and 2 of the constructed waterproof structures were observed, Examples 1 to 5 and Comparative Example 1 all had a uniform and smooth finish. Furthermore, the coating surfaces of Examples 4 and 5 were uniform, and the aggregate was uniformly dispersed. However, the coating surface of Comparative Example 2 was uneven, and the aggregate was also unevenly dispersed.

[0036] Adhesion tests were conducted on the coating films of each finishing paint applied to the waterproof sheet of the aforementioned waterproof structure in accordance with the cross-cut method of JIS K 5600-5-6:1999, and tests were performed on the stretch-following ability of the waterproof sheet at 100%, 200%, and 300% elongation. The results are shown in Table 3 below.

[0037] [Table 3]

[0038] As shown in Table 3, the adhesion test result was classified as 0, indicating no peeling. Furthermore, when the sheet's stretchability was checked, the waterproof sheet was stretched to 300%, and the condition of the coating was examined. No cracks occurred in the coating, confirming that the sheet has the ability to follow the sheet's stretch.

[0039] The coating films of each finishing paint applied to the waterproof sheet of the waterproof structure constructed as described above were visually observed 3 months and 7 months after the start of the test. The results are shown in Table 4 below.

[0040] [Table 4]

[0041] As shown in Table 4, numerous scratches caused by birds were observed on the coatings of the finish paints in Comparative Examples 1 and 2. In contrast, the coatings of Examples 1 to 5 showed fewer scratches. [Industrial applicability]

[0042] This invention provides a finishing coating for waterproof sheets that can more effectively prevent birds from pecking at or damaging the finishing coating, as well as a waterproof structure and waterproofing method using the same, which is industrially useful. [Explanation of Symbols]

[0043] 1. Reinforced concrete base 2 Waterproof sheet 3. Finishing paint 4 Aggregates 5. Insulation

Claims

1. A finishing paint for waterproof sheets that contains a repellent that utilizes the taste of birds.

2. The finishing paint according to claim 1, comprising a fast-acting repellent and a long-lasting repellent as the repellent.

3. The finishing paint according to claim 2, wherein the fast-acting repellent is pyrogallol or terpinolene and the long-lasting repellent is caffeine.

4. The finishing paint according to any one of claims 1 to 3, wherein the finishing paint comprises ethylene vinyl acetate resin and an organic solvent.

5. The finishing paint according to any one of claims 1 to 3, wherein the finishing paint includes aggregate.

6. The finishing paint according to claim 5, wherein the aggregate is silica sand.

7. The finishing paint according to any one of claims 1 to 3, wherein the waterproof sheet is a vulcanized rubber sheet.

8. A waterproof structure comprising a coating of a finishing paint on the surface of a waterproof sheet, wherein the coating is a coating of the finishing paint described in any one of claims 1 to 3.

9. The waterproof structure according to claim 8, wherein the finishing paint comprises ethylene vinyl acetate resin and an organic solvent.

10. The waterproof structure according to claim 8, wherein the finishing paint includes aggregate.

11. The waterproof structure according to claim 10, wherein the aggregate is silica sand.

12. The waterproof structure according to claim 8, wherein the waterproof sheet is a vulcanized rubber sheet.

13. The waterproof structure according to claim 8, wherein the waterproof sheet is laid on top of the insulation material.

14. A waterproofing method for constructing a waterproof structure comprising a coating of finishing paint on the surface of a waterproof sheet, wherein the finishing paint described in any one of claims 1 to 3 is applied to the surface of the waterproof sheet.

15. The waterproofing method according to claim 14, wherein the finishing paint comprises ethylene vinyl acetate resin and an organic solvent.

16. The waterproofing method according to claim 14, wherein the finishing paint includes aggregate.

17. The waterproofing method according to claim 15, wherein the aggregate is silica sand.

18. The waterproofing method according to claim 14, wherein the waterproofing sheet is a vulcanized rubber sheet.

19. The waterproofing method according to claim 14, wherein the waterproof sheet is laid on top of the insulation material.

20. The waterproofing method according to claim 16, wherein aggregate is mixed into the finishing paint when applying the finishing paint.

21. The waterproofing method according to claim 20, wherein the aggregate is silica sand.

22. The waterproofing method according to claim 14, wherein the waterproof sheet is laid on top of the insulation material.

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