JP2003328507A - Water-proofing method having infrared ray reflecting function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water-proofing method having an infrared ray reflecting function capable of inhibiting the rise of temperature of a water-proofing material face, remarkably reducing the heat intruded into a room, which remarkably reduces the cooling load and contributes to energy saving, and serving as one of measures against heat island phenomenon. <P>SOLUTION: The impregnation primer is applied to a surface of the concrete, and a water-proofing material in which a pigment of high solar insolation reflectivity defined in JIS A5759 is dispersed, is applied to the same by a thickness of 50-5000 μm, preferably 50-3000 μm. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a waterproof construction method having an infrared reflecting function.

[0002]

2. Description of the Related Art In the field of construction and civil engineering, a waterproofing method is generally used in which a waterproofing material is applied and applied for the purpose of waterproofing the roof, roof and outer wall of a concrete structure.

[0003]

Since the conventional waterproof material is mainly colored with carbon black such as gray, the surface temperature of the waterproof material rises and the indoor temperature rises when it is directly exposed to sunlight. As a result, the air-conditioning energy is increased, and it is one of the causes of the heat island phenomenon together with the heat storage of the building.

The object of the present invention is to eliminate the inconveniences of the conventional example, suppress the temperature rise of the waterproof material surface, and significantly reduce the amount of heat entering the room, thereby significantly reducing the cooling load and contributing to energy saving. It is possible to provide a waterproof method having an infrared reflecting function that can be used as one measure against the heat island phenomenon.

[0005]

In order to achieve the above-mentioned object, the present invention applies an impregnating primer to the surface of concrete,
On top of that, a waterproof material in which a pigment with high solar reflectance is dispersed is used.
The gist is that the coating is performed in a film thickness of μm to 5000 μm, preferably 50 to 3000 μm.

The waterproof material is mainly composed of a pigment and a resin. The pigment shows reflection in the near infrared region, has a solar reflectance of 30% or more as defined in JIS A5759, and is an organic and / or inorganic pigment. The essence is that the above is used alone or a plurality of them are mixed and dispersed.

According to the first aspect of the present invention, the surface of concrete is impregnated with a primer, and a waterproof material in which a pigment having a high solar reflectance is dispersed is applied onto the surface of the concrete. Adhesiveness is better than that in the case where water resistance is high, and water resistance is excellent.

Further, a waterproof material having a pigment having a high solar reflectance on the surface is dispersed in a range of 50 to 5000 μm, preferably 50.
By applying ~ 3000 μm and reflecting sunlight, the surface temperature rise of the waterproof material can be suppressed and the room temperature rise can also be suppressed, and at the same time the heat storage of concrete can be prevented.

According to the second aspect of the present invention, the surface temperature does not become higher than that of the conventional waterproofing method. further,
The surface temperature rise of the waterproof material is suppressed, the distortion of concrete is less likely to occur, and the waterproof property can be improved for a long time.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a longitudinal side surface showing an example of an embodiment of a waterproofing method of the present invention, in which 1 is a slate.

According to the present invention, the impregnation primer 2 is applied to the surface of the slate 1, the waterproof material 3 is applied twice thereto, and the finishing material is applied to 4.

The thickness of the waterproof material 3 is 1000 μm for both times.
The applied finishing material 4 has a thickness of 100 to 200 μm.

The waterproof material 3 and the finishing material are mainly composed of a pigment and a resin, and the pigment shows reflection in the near infrared region.
The solar reflectance defined by 5759 is 30% or more, and the organic and / or inorganic pigments are used alone or in combination.

The above-mentioned resin is a resin having excellent weather resistance, and refers to a resin having excellent durability such as yellowing resistance, color retention, gloss retention and chalking resistance.

Examples of the resin include urethane rubber type resin, acrylic rubber type resin, chloroprene rubber type resin, rubber asphalt type resin, epoxy type resin and unsaturated polyester type resin. Among these, the urethane rubber-based resin is particularly preferable because the waterproof material is excellent in rubber elasticity and has high followability to the displacement of the base such as concrete. As a curing method, using the above resin as a main agent, an isocyanate,
From the viewpoint of construction work, the one-component moisture-curing type is preferred. There are two-component type that mixes and cures at the time of construction using amine, acid, etc. as a curing agent, and one-component moisture-curing type that cures by moisture in the atmosphere However, an isocyanate group-containing urethane resin that can deal with it is preferable. The isocyanate group-containing urethane resin is obtained by reacting a polyisocyanate compound such as toluene diisocyanate or diphenylmethane diisocyanate with a hydroxyl group-containing compound such as polyoxypropylene polyol under the condition of excess isocyanate groups with respect to hydroxyl groups.

The pigment is a coloring pigment that reflects in the near infrared region and has a solar reflectance of 3 as defined in JIS A5759.
An organic pigment and / or an inorganic pigment are dispersed in an amount of 0% or more, and one or more pigments are mixed.

The organic color pigment is selected from the following. 1: (Yellow) SYMULER FAST YELLOW 4192 Made by Dainippon Ink & Chemicals Co., Ltd. 2: (Red) FASTONGN SUPER RED 500RG Kinacridon by Dainippon Ink & Chemicals Co., Ltd. 3: (Red) FASTONGN SUPER RED ATY Siamino Anthraquinonyl Dainippon Ink & Chemicals Co., Ltd. 4: (purple) FASTONGN SUPER VIOLET RVS JOXYGEN Dainippon Ink & Chemicals Co., Ltd. 5: (red-purple) FASTONGN SUPER MAGENTA R Kinakryton Dainippon Ink & Chemicals Co., Ltd. Made 6: (blue) FASTONGN SUPER BLUE 6070S Instron Dainippon Ink and Chemicals Co., Ltd. 7: (blue) FASTONGN BLUE RSK Phthalocyanin α Dainippon Ink and Chemicals Co., Ltd. 8: (blue) FASTONGN BLUE 5380 Phthalocyanin β Dainippon Ink and Chemicals Co., Ltd. 7: (green) FASTONGN GREEN MY Halogenated phthalocyanine Made by Dainippon Ink and Chemicals Co., Ltd.

The inorganic color pigment is selected from the following. A: (Yellow) Yellow 10401 CERDEC (Yellow) Yellow 10408 CERDEC A: (Red) Brown 10348 CERDEC C: (Green) Green 10405 CERDEC D: (Blue) Blue 10336 CERDEC E: (Purple) Brown 10364 Cerdec F: (Black) Brown 10363 Cerdec G: (White) Taipaque CR-97 Ishihara Sangyo (white) TR-81 Huntsman Thai Oxide organic coloring pigment, inorganic coloring The pigment is not limited to these as long as the solar reflectance is suitable for the purpose.

The particle size of the color pigment is not particularly limited, but is preferably 30 μm or less, particularly 20 μm or less from the viewpoint of stain resistance.

Further, the total amount of the above pigments used is in the range of 2 to 60% by weight in the solid content of the waterproof material. If the total amount of the pigment used is less than 2% by weight, the solar heat shielding effect is lacking, and if it exceeds 60% by weight, the amount of pigment in the coating film becomes too large and the chalking resistance is deteriorated. As a result, the weather resistance is poor. In this case, the solid content referred to here means a substance that does not volatilize or evaporate even when heated in the waterproof material composition, and generally refers to a component to be a coating film, and specifically, Refers to pigments, resin components, and other additives

In addition to the above color pigments, a titanium dioxide pigment may be used in combination as a white pigment to adjust the brightness. In addition, a white extender pigment may be included if necessary. As the white pigment G, TR-81 [manufactured by Huntsman Tyoxide Co., Ltd.] and Taipaque CR-97 [manufactured by Ishihara Sangyo Co., Ltd.] are preferable.

Although a small amount of a black pigment can be used for the purpose of obtaining a low bright color, generally used carbon black has a markedly impaired solar heat shielding effect, so that the coloring pigments of yellow, red purple and blue are black or black. Give out.

The composition of the waterproof material 3 and the finishing material 4 configured as described above can be dissolved in and dispersed in an organic solvent and / or water and adjusted to have a viscosity suitable for application before use.
As the organic solvent, a hydrocarbon solvent, an alcohol solvent, an ether alcohol solvent, an ether solvent solvent, an ester solvent, an ester alcohol solvent solvent, or a ketone solvent solvent can be used, which has a suitable coating property and drying property. In addition, if necessary, a filler such as calcium carbonate, a surface smoothing agent, an ultraviolet absorber, an antioxidant, a plasticizer, a viscosity modifier, a curing catalyst, a pigment dispersant, a pigment settling inhibitor, a color separation inhibitor, and a shaking agent. A modifier or the like can be used.

The method of applying the waterproof material 3 and the finishing material 4 is not particularly limited, but the waterproof material 3 can be applied by a spray, a spatula or a trowel, and the finishing material 4 can be applied by a spray, a brush or a roll coater.

[0025]

EXAMPLES Next, a test conducted to confirm the performance of the waterproof method having an infrared reflecting function of the present invention will be described. <Compound Example 1> A compound example of the waterproof material 3 used is shown. Waterproof material blended gray [parts by weight] 1-component urethane waterproof material base (made by Auto Kagaku Kogyo Co., Ltd.) (Orton Proof (white), using isocyanate-containing urethane resin) 100 Red pigment (Dainippon Ink and Chemicals Co., Ltd .: FASTONGN SUPER RED 500RG) Quinacridone 2 Blue pigment (Dainippon Ink and Chemicals Incorporated: FASTONGN BLUE RSK Phthalocyanine α) 2 Yellow pigment (Dainippon Ink and Chemicals Incorporated: SYMULER FAST YELLOW 4192 Benzimidazolone) 5 (Total 109) <Infrared reflective finishing material Mixing Example> A mixing example of the used finishing material 4 will be shown. Finishing material combination Gray color [parts by weight] Neopaint Urethane # 8500 Main agent (made by Asia Kogyo Co., Ltd.) 75 Neopaint Urethane # 8500 curing agent (made by Asia Kogyo Co., Ltd.) 25 Titanium dioxide type tape CR-97) (Made by Ishihara Sangyo Co., Ltd.) ) 30 red pigment (Dainippon Ink and Chemicals: FASTONGN SUPER RED 500RG quinacridone) 2 blue pigment (Dainippon Ink and Chemicals: FASTONGN BLUE RSK phthalocyanine α) 2 yellow pigment (Dainippon Ink and Chemicals: SYMULER) FAST YELLOW 4192 Benzimidazolone) 5 Solvent (Urethane thinner # 85 manufactured by Asia Kogyo Co., Ltd.) 30 (total 169) <General waterproofing material compounding example> For comparison, 1 liquid urethane waterproofing material (Auto Chemical Co., Ltd.) Manufactured by Orton Proof Gray) was used. <General finishing material compounding example> General finishing material 4 used for comparison
An example of the above is shown below. Finishing material combination Gray color [parts by weight] Neopaint Urethane # 8500 Main agent (manufactured by Asia Kogyo Co., Ltd.) 75 Neopaint Urethane # 8500 curing agent (manufactured by Asia Kogyo Co., Ltd.) 25 Titanium dioxide (Sakai Chemical Industry Co., Ltd. TCR-10) 30 Yellow Pigment (Bayferrox Yellow # 920 manufactured by Bayer Co., Ltd.) 1.5 Carbon black (Thermal Black manufactured by Asahi Carbon Co., Ltd.) 1.0 (total 132.5)

The waterproof material and the finishing material are adjusted by kneading the raw materials described in each of the above-mentioned compounding examples in a kneading device until they become uniform for 0.5 hours, defoaming under reduced pressure, and then filling in a closed container. Was obtained (however, the general waterproof material for comparison was used as it was). Next, the slate surface 1 was coated with the impregnated primer 2 (Orton Proof P, manufactured by Auto Chemical Industry Co., Ltd.) by brushing, and allowed to stand for 30 minutes by natural drying. 2 hours at 23 ° C and 50% relative humidity
As a degree coating, the same waterproofing material was applied on it with a spatula of 1000 μm, left at 23 ° C. and 50% relative humidity for 1 day, and then the finishing material 4 was applied with a spatula of 100 to 200 μm.
The specimen was left for 7 days at 0% relative humidity to cure and cure, which was used as a test specimen.

<Experiment 1> As an experimental method, a test body coated with a general waterproof material and a test body coated with a waterproof material having an infrared reflecting function were irradiated with an infrared lamp for about 20 minutes.

FIG. 2 shows the difference in the spectral reflection performance between the comparative general waterproof material and the waterproof material having the infrared reflecting function. In addition, Table 1 shows the solar reflectance and the surface temperature measurement results.

[Table 1]

As can be seen from Table 1, in the waterproof material having the infrared reflecting function used in the experiment, the maximum surface temperature of the waterproof material was lowered by about 21 ° C. This shows the relationship with the spectral reflectance. And how to design a waterproof material with increased spectral reflectance.

[0030]

As described above, the waterproof material having the infrared ray reflecting function of the present invention suppresses the surface temperature rise of the waterproof material itself and the indoor temperature rise, and at the same time prevents the heat accumulation of concrete to prevent the heat island. Can contribute to.

[Brief description of drawings]

FIG. 1 is a waterproof method 1 having an infrared reflecting function of the present invention.
It is a vertical side view showing an embodiment.

FIG. 2 is a graph showing spectral reflection performance.

FIG. 3 is a schematic view showing an example of an apparatus for evaluating heat shield properties.

[Explanation of symbols]

1 slate 2 Impregnation primer 3 Waterproof material with infrared reflection function 4 Finishing materials 5 specimens 6 test boxes 7 Temperature sensor 8 incandescent lamps 9 power supplies 10 recorder

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) E04F 13/02 E04F 13/02 A (72) Inventor Katsuo Miki 2-809 Amanuma-cho, Saitama City Saitama Prefecture No. Market Creation Co., Ltd. F-term (reference) 4D075 AE03 AE07 BB92Z CA38 CB04 DA06 DA23 DB12 DC02 DC03 DC05 EA07 EB38 EC11

Claims (4)

[Claims] 1. A waterproof having an infrared reflecting function, characterized in that a concrete impregnated primer is applied to the surface of the concrete, and a waterproof material in which a pigment having a high solar reflectance is dispersed is applied to the concrete in a film thickness of 50 μm to 5000 μm. Construction method. 2. The waterproof material is mainly composed of a pigment and a resin,
The pigment has a reflection function in the near infrared region, and has an infrared reflection function according to claim 1, wherein an organic and / or inorganic pigment having a solar reflectance of 30% or more as defined in JIS A 5759 is dispersed. Waterproof material. 3. The waterproof method having an infrared reflecting function according to claim 1, wherein the resin of the waterproof material is a urethane resin containing an isocyanate group. 4. The coating film thickness is 50 μm to 5000 μm, coating is carried out once or several times, and any one or all of the single step or the plurality of steps are performed. Waterproof method with infrared reflection function.