JPS6018786B2 - Building waterproof sheet construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention mainly relates to a method of constructing a waterproof sheet for buildings in complicated areas such as projecting corners, entering corners, around drain pipes, etc. in waterproofing building roofs.

(Prior Art) When waterproofing roofs of buildings, sheet waterproofing or coating waterproofing is generally applied to complex areas such as external corners, internal corners, and around drain pipes.

Among these, sheet waterproofing is performed using unvulcanized sheets and vulcanized sheets, but in the case of unvulcanized sheet construction, it is relatively easy to adapt to uneven ground surfaces. Materials with high stress can be classified into ethylene vinyl acetate rubber (EVA), polyvinyl chloride (PVC), etc. The former is suitable for construction in the complex areas mentioned above, but if cracks occur in the base, necking may occur. This causes the sheet at the cracked part to be stretched and become thinner, and there is a risk of the sheet being cut.Also, if air is trapped, the sheet may rupture due to air expansion, which not only looks bad but also causes the sheet to become thinner. There is a drawback that it can cause water leakage. On the other hand, in the case of the latter EVA, PVC, or vulcanized sheets, rebound resilience acts in the corners and recesses of complicated areas, and they do not blend well with the construction surface, resulting in voids between the construction surface and the sheet. There are defects that can cause water spots. (Problems to be Solved by the Invention) The present invention focuses on the above-mentioned drawbacks of construction of a conventional waterproof sheet, and solves this by using a vulcanized rubber sheet having plasticity and flexibility. A method for constructing a waterproof sheet for buildings that completely adheres it along the corners and recesses of complex parts of objects, then coats the sheet with paint and allows it to naturally vulcanize, thereby effectively waterproofing buildings. The purpose is to provide

(Means for Solving the Problems) That is, the present invention is characterized by the Mooney viscosity (M-mount, 15a
tlooo.

○) 40 to 6 Tochio degrees, below 40 the sheet will break, above 60 it will not blend, unvulcanized sheet with this characteristic and containing vulcanizing agent and vulcanization aid is laid in complex areas with base adhesive. This is a construction method that consists of pasting and blending, and then applying a paint containing only a vulcanization aid or a paint containing both a vulcanization agent and a vulcanization aid, which allows for natural vulcanization in a short period of time. This makes it possible to prevent the sheet from breaking due to cracks in the base or expansion of the air contained therein, which were problems with the aforementioned unvulcanized sheets. Therefore, although the above-mentioned waterproof sheet of the present invention is mainly applied to complicated parts of buildings using a base adhesive, it is not limited to complicated parts, and can be applied to ordinary flat bases. The effect is fully demonstrated even in the case of

The unvulcanized rubber sheet used in the present invention may be one or a blend of two or more of polyisoptylene, butyl rubber (11R), ethylene propylene copolymer (EPR), ethylene propylene terpolymer (EPT), etc. In addition to a softening agent and a vulcanization accelerator, stearic acid, carbon black, an inorganic filler, zinc oxide, etc. are mixed and blended as necessary.

On the other hand, in the present invention, the paints applied to the vulcanized rubber sheet include acrylic resin, vinyl acetate-vinyl chloride copolymer, vinyl chloride-pinylene chloride copolymer, various synthetic rubbers, epoxy resins, and others. It includes known paints and can be dissolved in a solvent or used in the form of an emulsion.

Of course, pigments are appropriately mixed into the paint. Also, in the above-mentioned paint, like the unvulcanized rubber sheet, only a vulcanization aid or a bulking agent and a vulcanization aid are mixed in the required proportions.

Here, the proportions of each mixture in the unvulcanized rubber sheet and the paint are not necessarily constant, but in the case of an unvulcanized rubber sheet, 1 to 6 parts by weight of a vulcanizing agent is added to 100 parts by weight of rubber to accelerate vulcanization. Most commonly, 2 to 1 parts by weight of the vulcanizing agent and 2 to 1 parts by weight of the curing accelerator are used, based on 10 parts by weight of the vulcanizing agent and 10 parts by weight of the resin in the case of paint. Incidentally, the vulcanizing agent includes sulfur type, P-quinone dioxime (GMF) type, resin type such as olefin type, phenol type, xylene type resin, etc., and is selected and used as appropriate.

However, the most common ones are sulfur-based and GMF-based.
Vulcanization aids mainly include vulcanization accelerators, including test latium monsulfide (TTM) and lead peroxide (PO02).
), trimene base, and other known vulcanization accelerators.

However, the unvulcanized rubber sheet formulated as described above is
The waterproof sheet for buildings according to the present invention is constructed by first adhering it to the base construction surface using a base adhesive, and then applying the above-mentioned paint thereon.As the base adhesive, for example, CR (chloroprene) ) type rubber dissolved in a solvent such as toluene or CR emulsion is used.

In particular, when applying a vulcanized rubber sheet to a complicated area, it is extremely effective to use a base adhesive. In this way, the vulcanized rubber sheet formulated as described above and coated with a paint can prevent the base from cracking due to natural vulcanization and the sheet from breaking due to air expansion inside the sheet, making it an extremely excellent product. It has waterproof sheet properties.

Hereinafter, the present invention will be further explained with reference to Examples. Example 1
Unvulcanized rubber sheet-style recipe table Paint composition Tsukuda recipe table As shown in the above recipe table, the unvulcanized rubber sheet type has EP
T60-70, 11R40-30 Blend 1 to 2 parts of S as a vulcanizing agent, and a vulcanization accelerator TT as a vulcanization aid
Coating composition (B)-1 was mixed with 2.5 parts of M, 2 to 4 parts of trimene base (accelerator) as a vulcanization aid, and Tsukuda-2.
contains 4 parts of GMF as a vulcanizing agent and Pb0 as a vulcanizing aid.
6 parts of 2 were mixed.

However, in the waterproof sheet according to the construction method of the present invention, the surface temperature of the sheet reaches 80'0 due to direct sunlight in summer, so the paint composition {B-1
, 'B}-2 was applied and not applied, and the vulcanized state of the unvulcanized rubber sheet was examined by the physical properties after storage at 80°C. Got the results.

In addition, the tensile strength is determined by JIS using a No. 3 dumbbell test piece.
This was done using K-6301. Further, in FIG. 1A, the left axis represents the tensile strength, and the lower axis represents the number of days elapsed, while the left axis of FIG. 1A represents the elongation rate, and the lower axis represents the number of days elapsed. At the mouth of FIG. 1, paint Tsukuda-1 according to the method of the present invention,
{The elongation of the specimens to which B'-2 can be applied is significantly reduced compared to those without the paint; on the other hand, as shown in Figure 1A, the tensile strength of tB}-1 and leg-2 is slight. 1-2
It was understood that the vulcanization accelerator in the paint migrated to the interface of the vulcanized rubber sheet and promoted natural vulcanization.

Example 2 Next, an unvulcanized rubber sheet was pasted onto a base of wood 2 with corners as shown in Fig. 2 using a base adhesive, and a coating composition {B
} applied and combined waterproof sheet 1 with 20 to 2500
After curing day and night, the tarpaulin sheet was placed in an 80q◯ oven and the state of lifting of the corners of the tarpaulin sheet over time due to vulcanization was examined, and no lifting of the tarpaulin sheet was observed with the naked eye.

From the above table, it can be seen that the waterproof sheet produced by the method of the present invention is naturally applied in a state where it is sufficiently blended into the uneven portions of the base.

Example 3 Next, as shown in FIG. 3, the paint 'B}-2 was applied to the joint of the unvulcanized rubber sheet and left to dry to the touch.
After curing for 1 day and night, put it in an 80qo oven and after a few days JISK
-6301 (pulling speed of 500 side/min) As a result of conducting a deep peeling test, there was some tearing of the waterproof sheet in all cases.

As is clear from the above table, the waterproof sheet of the present invention is highly reliable and does not peel off even at the joints of the waterproof sheet by combining the above-mentioned paints, and the adhesive strength is also sufficiently improved.

(Effects of the invention) As described above, according to the construction method of the present invention,
The waterproof sheet after construction has excellent performance.
When waterproofing complex parts of a building, apply an unvulcanized rubber sheet containing the vulcanizing agent and vulcanizing aid and a paint containing only the vulcanizing aid, or a paint containing the vulcanizing agent and vulcanizing aid. By applying a tarpaulin sheet, the paint can be naturally cured in 1 to 2 days in an 8000 oven, which normally takes 4 to 7 days in an 8000 oven. It has an excellent feature that can prevent the cracking of the base, which was a problem with unwashed sheets, as well as sheet tearing due to air expansion inside the sheet, further improving the waterproofing effect.

[Brief explanation of drawings]

Figure 1 A is a diagram showing changes in physical properties over time in the vulcanized state of the unvulcanized rubber sheet in Example 1, and Figure 2 is a diagram showing the adhesion of the waterproof sheet of the present invention to the corner of the base in Example 2. A sectional view showing the state, and FIG. 3 is a perspective view of a waterproof sheet joint in Example 3. Hair drawing

Claims (1)

[Claims] 1 Mooney viscosity containing vulcanizing agent and vulcanizing aid (
ML_1_+_5, 100℃) A rubber sheet with properties of 40 to 60 is adhered to the construction base surface with an unvulcanized base adhesive, and then a vulcanization aid or a vulcanization agent and a vulcanization aid are applied thereon. A method for constructing a waterproof sheet for a building, characterized by applying a paint containing the same.