JPS6343226B2 - - Google Patents

Description

[Detailed description of the invention]

In the present invention, a water-dispersible rubber-based pressure-sensitive adhesive is applied in advance to an inorganic or organic board such as plywood, gypsum board, asbestos board, cement mortar board, metal board, or plastic as a ready-made board. After the barrel,
After drying, the surface is coated with water-mixed cement mortar or uncured materials such as plaster, and then cured and bonded to the molded plate through the use of rubber-based pressure-sensitive adhesives. The present invention relates to a method for manufacturing painted architectural panels, which is characterized by the following. This invention is a new technology that is a further development of Patent No. 869246 (method for manufacturing composite panels for construction). In other words, although the purpose of Patent No. 869246 is similar, the content is limited to examples in which the rubber raw material is dissolved in a solvent, but in the present application, rubber obtained by dispersing recycled rubber in water is used. Furthermore, it is characterized by the use of a rubber-based pressure-sensitive adhesive prepared by using rubber latex, synthetic resin emulsion, etc. in combination. That is, when rubber-based pressure-sensitive adhesives are mainly made of synthetic rubber or recycled rubber, it is common to add adhesive resin to add adhesive strength, but there are other methods to soften the rubber. By mixing a bituminous material, the rubber and bituminous material can be used as a rubber-based pressure-sensitive adhesive by utilizing the effect that the rubber and the bituminous material are compatible and exhibit adhesive strength. Conventionally, many adhesive construction methods have been used to combine molded boards such as cement mortar and plaster with ready-made boards such as plywood, gypsum board, asbestos board, cement mortar board, metal board, and plastic board. It is a fact known to all. Separately,
The method of applying water-mixed cement mortar or plaster to various boards is similar to that seen in traditional Japanese-built houses, where wood mai, lath wire mesh, etc. are mechanically fixed to the board surface. The concrete is coated with cement mortar or plaster paste. Both of the above two conventional construction methods involve the simultaneous molding of composite plates and have various problems. That is,
In order to manufacture composite plates, there is a method of adhesive molding using adhesive after cleaning, polishing, chemical treatment, etc. of the surface of the adherend, or other methods of mechanical fixation. It requires a lot of man-hours and time, and has the drawbacks of being affected by open time and adhesion timing when combining, environmental conditions such as temperature and humidity, and requiring a high degree of human skill. The present invention was completed with the aim of improving the defects of the conventional quality and construction methods. Therefore, the greatest feature of the present invention is that an uncured cement mortar that can be wetted by a rubber-based pressure-sensitive adhesive present in the middle;
Alternatively, as the curing reaction of cement mortar or plaster progresses in contact with plaster, adhesion through ionic bonds is completed at the interface, forming a composite plate. Rubber-based pressure-sensitive adhesive The role of agents is extremely important. It is desirable to use durable rubber for the rubber-based pressure-sensitive adhesive as a component of the present invention, and generally, isoprene/isobutylene copolymer rubber (commonly known as butyl rubber), butyl recycled rubber, ethylene/
Propylene copolymer rubber, aqueous dispersion of acrylic rubber, etc. are mainly used, but other emulsion materials such as durable synthetic rubber emulsions modified with bituminous substances may be used in combination with various synthetic resin emulsions. . Although the various new rubbers and recycled rubbers mentioned above can also be used in the present invention, it is meaningful to use recycled butyl rubber, which is the most effective, both functionally and economically. These rubbers are used as water-dispersed rubber, and first, in the process of manufacturing butyl recycled rubber, a surfactant is added for the purpose of water dispersion, but in this case, hydrophilic and lipophilic surfactants are used alone. Alternatively, by mixing and absorbing into vulcanized butyl rubber powder and then desulfurizing the butyl recycled rubber, it can be easily dispersed in water. After adding an adhesive, a softener, an anti-aging agent, a reinforcing filler, and a surfactant to the obtained butyl recycled rubber and kneading it, the cohesive force of the kneaded rubber itself is reduced with a small amount of solvent. By sequentially adding water, a water-dispersible rubber-based pressure-sensitive adhesive is obtained. A specific example will be described later. These water-dispersible rubber-based pressure-sensitive adhesives are applied to the panel using a roll coater, spray, doctor coat, brush, etc., and then the moisture is evaporated and dried. This is because when using the rubber-based pressure-sensitive adhesive according to the present invention, before the adhesive layer is sufficiently dry, that is, before it is dry to the touch, cement mortar or plaster mixed with water is applied to the surface and dried. It has been confirmed that many cracks occur in cement mortar when it is hardened and cured, so the adhesive layer must be dried and solidified. When the rubber-based pressure-sensitive adhesive layer of the present invention is applied, dried and solidified, and then water-mixed cement mortar is applied and allowed to dry and harden, no cracks occur in the cement mortar. This is because the amount of change in volume shrinkage of the adhesive layer is small. Therefore, the greatest feature of the present invention is that a water-dispersed synthetic rubber emulsion is applied to an adherend, and after drying and solidifying, cement mortar or plaster, etc. mixed with water, forms an ionic bond between the adhesive layer and the interface during the curing crystal reaction stage. It has been found that the present invention has adhesion properties due to the presence of adhesive properties, and the usefulness of practical application has been fully confirmed by implementing the present invention on the walls of houses and buildings. It is desirable to add a pattern that will make it look like this. After that, the cement mortar mixed with water is painted. As confirmed through various experiments, it is preferable to use a base made of butyl recycled rubber dispersed in water alone or in combination with synthetic rubber latex or synthetic resin emulsion. Even if recycled rubber is not used in combination, it is thought that it can be put to practical use. However, since a large amount of adhesive resin is required to impart tackiness, and synthetic rubber latex is expensive, it is desirable from an experimental standpoint to use water-dispersed recycled rubber in combination. Examples are shown in the table below. [The butyl recycled rubber used was an emulsion produced by Hayakawa Rubber Co., Ltd., in which a water-dispersible special butyl recycled rubber was dispersed in water, as shown in the table. ]

【table】

[Table] Using a double-arm pressurized kneader, masticate special butyl recycled rubber with the compound shown in the table, add polybutene and surfactant, and sequentially add toluene and mix uniformly. After kneading is completed, water (warm water) is added little by little and mixing is continued to obtain a viscous liquid of butyl recycled rubber dispersed in water. Next, by adding water little by little while stirring using a high-speed stirrer, an aqueous dispersion of butyl recycled rubber is obtained. Examples Formulation examples based on water dispersion of butyl recycled rubber Table - Butyl recycled rubber 100 parts Anti-aging agent 1 Polybutene 15 Surfactant 0.02 Turpentine polymer resin 15 Toluol 20 161.02 Water (warm water) 100 total 261.02 Water dispersion of the above butyl recycled rubber Base properties viscosity 50000-80000 ^CRS @25℃ BH type #64v.pm Solid content 52% Example 1 Butyl recycled rubber emulsion 100 parts Anti-aging agent 1 Surfactant 0.02 Polybutene 15 Turpentine polymer resin emulsion 25 Calcium carbonate 200 Clay 50 total 391.02 Example 2 Butyl recycled rubber emulsion 50 parts Butyl rubber latex 50 Anti-aging agent 1 Surfactant 0.02 Polybutene 25 Turpentine polymer resin emulsion 30 Calcium carbonate 200 Clay 50 Water 100 total 506.02 Example 3 Butyl recycled rubber emulsion 50 parts Chloroprene Rubber latex 50 Anti-aging agent 1 Surfactant 0.02 Polybutene 20 Turpentine polymer resin emulsion 25 Calcium carbonate 200 Clay 50 Water 100 total 496.02 Example 4 Butyl recycled rubber emulsion 50 parts Acrylic emulsion 50 Anti-aging agent 1 Surface active 0.02 Polibuten 15 Telepine polymerization resin Emaru Jiyon 25 carbonated 200 clay 200 clay 50 water 100 water 100 total 491.02 Examples 5 Butyl Gum Latetsxes 1 Surface Interview agent 1 Surface 200 clay 50 total 430.01 The above-mentioned disposal example is similarly stirred using a high-speed stirrer to obtain a water-dispersed rubber-based pressure-sensitive adhesive. Test conditions: Prepare the rubber-based pressure-sensitive adhesive shown in the table.
Apply 300g/ ^m2 uniformly with a brush onto standard mortar boards and plywood made in accordance with JIS-R-5210, leave at room temperature for a day and night, then apply standard mortar to a thickness of 30mm and allow to cool to room temperature. After curing for 7 days, a steel attachment 50 mm x 100 mm was adhered to this using an epoxy resin adhesive, and after being left to cure at room temperature for 24 hours, the adhesive force was determined by pulling perpendicular to the bonded surface. The tensile test was performed using a universal tensile testing machine at room temperature at a speed of 50 mm/min, and the maximum load value was determined. The test is shown as the average value of 3 test pieces.

[Table] Next, drawings of the architectural painted panel of the present invention will be described in detail. In the drawing, 1 indicates the adherend material, which includes existing cement mortar board, asbestos cement board, plywood, gypsum board,
It is a plate-shaped body such as a metal plate or a plastic plate. 2 shows a layer in which a water-dispersed rubber-based pressure-sensitive adhesive is applied and dried, and 3 is a layer in which uncured cement mortar or plaster mixed with water is applied, cured, and adhesively molded. In FIG. 2, cured bodies 3, 3 are adhesively molded on both surfaces of an adherend 1, respectively. An existing molded adherend 1, such as a plate-shaped body such as a cement mortar board, an asbestos cement board, a plywood board, a gypsum board, a metal plate, or a plastic board, is selected depending on the type of the adherend 1. Apply water-dispersed rubber pressure sensitive adhesive 2. There are various ways to apply the adhesive; roll coater method uses 100-150gr/ ^m2 , spray method uses 200gr/m2-
It becomes 300gr/ ^m2 . If there are some irregularities due to the surface condition of the adherend 1, in the case of brush application method,
The usage amount is 500-800gr/ ^m2 . Conditions differ depending on the method of applying the water-dispersed pressure-sensitive adhesive and the surface condition of the adherend, but in general, if it is less than 100g/ ^m2 , it will be difficult to completely cover the unevenness of the surface, or
Using 800gr/m ² or more is not only expensive, but if the adhesive layer becomes too thick, it is unsuitable because it tends to contain air bubbles and voids, which may weaken the adhesive strength. . Drying after application would require a day and a night at room temperature, but if heating, ventilation, and equipment are installed, the time required for drying and curing can be greatly shortened. Next, cement mortar is applied to this surface.
Alternatively, the architectural painted panel according to the present invention is completed by applying a paste obtained by adding and kneading gypsum with water. As detailed above, when cement mortar or gypsum mixed with water is hardened and cured, the hardening reaction takes advantage of the ability to adhere to the rubber adhesive, and the rubber adhesive is made into a water-dispersed type. It is characterized by:

[Brief explanation of the drawing]

1 and 2 each show a longitudinal sectional view of a painted architectural panel manufactured according to the invention. 1...Substrate, 2...Rubber pressure sensitive adhesive layer, 3...
...Unhardened cement mortar or plaster mixed with water.

Claims (1)

[Claims] 1. Apply a water-dispersed rubber-based pressure-sensitive adhesive layer in advance to the surface of a single or multi-layered board of organic or inorganic pre-formed materials such as plywood, gypsum board, asbestos board, cement mortar metal, plastic, etc. After
After drying and solidifying the adhesive layer, unhardened cement mortar or plaster mixed with water is applied to the surface layer, and when these unhardened materials are cured and hardened,
A method for producing a painted panel for architectural use by bonding and integrating the molded product.