JP2009068327A - Construction method of plate-shaped decorative material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method capable of easily providing a joint part or the like by using an adhesive providing easy visible marking before adhesive hardening (at construction), and facilitating determination of an adhering position. <P>SOLUTION: The adhesive includes an aqueous resin A and a powder component B, with a pigment volumetric concentration of 30% or more, the powder component B includes a porous powder B-1 wherein at least oil absorption is at least 100g/100g, and concealability after hardening is improved when comparing before and after hardening. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a construction method in which an adhesive using a water-based resin as a binder and a plate-like decorative material are attached to a substrate via an adhesive.

  Conventionally, as a plate-like decorative material construction method such as tiles, sheet building materials, etc. on the base material, a method of drawing a summing out line (reference line) on the base material and determining the attachment position of the decorative material using these lines as a guide, In addition, a method for determining a sticking position using a joint tape or a masking material (for example, see Patent Documents 1 and 2) has been proposed.

  However, when an inking line is drawn on the base material and an adhesive having a high hiding power is used when constructing the decoration material, the inking line may be covered and it may be difficult to confirm. In addition, when an adhesive with low concealability is used, there is a possibility that the ink marking line may be seen through the joint portion or the like at the time of finishing, and a process such as filling the joint portion with a joint material is necessary. Moreover, when constructing a decorative material using joint tape or a masking material, it is necessary to draw a reference line and further paste the joint tape or masking material, which may complicate the work.

JP 62-133245 A JP2005-307590

  The present invention has been made in view of the above-described problems. In the construction of a plate-shaped decorative material, it is easy to see the inking line before the adhesive is cured (at the time of construction), and it is easy to determine the attachment position. An object of the present invention is to obtain a construction method in which an adhesive can be used to easily provide joints and the like.

As a result of intensive studies to achieve the above object, the present inventor includes an aqueous resin (A) and a powder component (B), and has a pigment volume concentration of 30% or more, and the powder component (B) In this case, at least the porous powder (B-1) having an oil absorption of 100 g / 100 g or more is included, and when comparing before and after curing, a construction method of a plate-like decorative material using an adhesive that improves concealability after curing is conceived. The present invention has been completed.
That is, the plate-shaped decorative material construction method of the present invention has the following characteristics.

1. A construction method for fixing a plate-like decorative material to a base material,
A first step of marking the surface of the substrate;
A porous powder (B-1) containing an aqueous resin (A) and a powder component (B), having a pigment volume concentration of 30% or more, and having at least an oil absorption of 100 g / 100 g or more in the powder component (B). ), And when comparing before and after curing, a second step of applying an adhesive that improves concealment after curing,
Next, a third step of attaching the plate-shaped decorative material at a predetermined interval so that the adhesive is exposed between the plate-shaped decorative materials,
A fourth step of curing the adhesive;
Construction method of plate-like decoration material including
2. The board according to claim 1, wherein an adhesive in which at least 2% by weight or more of the powder component (B) is the porous powder (B-1) is used as the adhesive. How to apply a decorative material.
3. Of the powder component (B), the powder component (B-2) having a refractive index of 1.8 to 3.0 and an average particle size of 0.1 μm to 1 μm is 5 wt% or less as the adhesive. The method for constructing a plate-like decorative material according to claim 1 or 2, wherein an adhesive is used.

  In the construction method of the plate-shaped decorative material of the present invention, by containing a specific porous powder as a powder component, the concealability is low before the adhesive is cured (at the time of construction), and after the adhesive is cured (at the time of finishing). An adhesive with high concealability is used for. Specifically, since the pores of the porous powder are filled with water or the like before the adhesive is cured, light irregular reflection hardly occurs and the concealability of the adhesive is lowered. On the other hand, after the adhesive is cured, light is irregularly reflected in the pores of the porous powder, and the concealability of the adhesive can be improved. This makes it easy to confirm the ink marking line before curing the adhesive (during construction), and the ink marking line is concealed after curing the adhesive (finished), so that the adhesive is exposed. When constructing a flat plate-shaped decorative material, it becomes possible to easily form joints and the like. Furthermore, in this invention, the outstanding adhesiveness, flexibility, and displacement followability can be obtained.

  Hereinafter, the best mode for carrying out the present invention will be described.

First, the adhesive used in the present invention (hereinafter referred to as “the present adhesive”) will be described in detail.
The adhesive of the present invention is an adhesive comprising an aqueous resin (A) and a powder component (B).
The aqueous resin (A) (hereinafter referred to as “component (A)”) is not particularly limited as long as it is used in conventional aqueous adhesives and the like, but is water-soluble resin and water-dispersible resin (resin emulsion). ), Etc., or a combination of these.

  As the component (A), for example, acrylic resin, urethane resin, epoxy resin, vinyl acetate resin, silicon resin, fluorine resin, acrylic / styrene resin, acrylic / vinyl acetate resin, acrylic / urethane resin, acrylic / silicone resin, silicon Examples thereof include water-soluble and / or water-dispersible resins such as modified acrylic resins, ethylene / vinyl acetate / vinyl versatic acid, and ethylene / vinyl acetate resins. In particular, the adhesive of the present invention preferably uses a water-dispersible resin (resin emulsion).

  Examples of the powder component (B) (hereinafter referred to as “component (B)”) include kaolin, clay, wax, bentonite, talc, marlite, boehmite, calcium silicate, allophane, diatomaceous earth, siliceous shale, Sepiolite, attapulgite, montmorillonite, zonorite, imogolite, quartz powder, silica, zeolite, alumina, calcium carbonate, magnesium carbonate, aluminum hydroxide, aluminum oxide, titanium oxide, zinc oxide, iron oxide, etc., or pulp powder , Synthetic fiber powder, amino resin, polyethylene, silicone resin, organic powder such as polymethyl methacrylate, black pigment such as carbon black, white pigment such as titanium oxide, inorganic such as yellow, orange, red, purple, blue or Organic pigments can be used. These powder components can be used alone or in combination of two or more.

The amount of the powder component (B) used is such that the pigment volume concentration (hereinafter referred to as “PVC”) is 30% or more (preferably 30% or more and 90% or less, more preferably 40% or more and 80% or less). is there. By setting the PVC in the above range, it is excellent in concealability, flexibility and followability to the base material after curing of the adhesive (during finishing). Moreover, it becomes difficult to produce the thinning of the meat by drying. For this reason, even if there are scratches or irregularities on the surface of the base material, the plate-shaped decorative material can be uniformly applied without any pretreatment.
The pigment volume concentration in the present invention is a volume percentage of the powder component (B) contained in the dry adhesive and is a value calculated by the following formula.

<Formula> Pigment volume concentration (%) = [(bw / bρ) / {(aw / aρ) + (bw / bρ)}] × 100
(Wherein, aw is the mixing weight of the component (A), aρ is the specific gravity of the component (A), bw is the mixing weight of the component (B), and bρ is the specific gravity of the component (B).)

  In the present invention, the powder component (B) includes the porous powder (B-1). As this porous powder (B-1) (hereinafter referred to as “component (B-1)”), marlite, boehmite, silica gel, zeolite, alumina, allophane, diatomaceous earth, siliceous shale, sepiolite, attapulgite, montmorillonite , Zonolite, imogolite, porous synthetic resin particles, and the like. In the present invention, marlite, silica gel, and diatomaceous earth are particularly preferable. Such a component (B-1) is difficult to cause irregular reflection of light because the pores are filled with water or the like before the adhesive is cured (at the time of construction), and the concealability of the adhesive is lowered, and after the adhesive is cured. When (finished), irregular reflection of light occurs at the interface in the pores, and the concealability of the adhesive is improved. These may have different effects depending on the particle diameter of component (B-1), the amount of oil absorption, and the like.

In the present invention, the oil absorption amount of the component (B-1) is preferably 100 g / 100 g or more (preferably 110 g / 100 g or more and 230 g / 100 g or less, more preferably 110 g / 100 g or more and 200 g / 100 g or less). By making the oil absorption amount within the above range, the effect of reducing the concealment of the adhesive before curing the adhesive (during construction) and the effect of improving the concealment of the ink line after curing (during finishing) are exhibited. In addition, it is excellent in flexibility after curing of the adhesive (finished) and followability to the substrate.
The oil absorption is a value measured according to JIS K 5101-13-1 (refined linseed oil method).

  Moreover, in this invention, it is preferable that the particle diameter of (B-1) component is about 1-50 micrometers. In such a range, the effect of the present invention is easily obtained.

Furthermore, it is preferable that (B-1) component is contained 2% by weight or more (preferably 5% by weight or more, more preferably 10% by weight or more and 70% by weight or less) in the component (B). Although it depends on the PVC of the adhesive, it is excellent in concealability, flexibility, and followability to the substrate after curing the adhesive (finished) by setting it in the above range.
Moreover, the outstanding drying property and adhesive force can be exhibited by including (B-1) component. Furthermore, it becomes difficult for the meat to become thin due to drying. For this reason, even if there are scratches or irregularities on the surface of the base material, the plate-shaped decorative material can be uniformly applied without any pretreatment. Furthermore, when the joint is provided on the base material so that the adhesive is exposed between the plate-shaped decorative materials, and the joint portion is provided, the thinning of the joint portion can be suppressed and the finish of the joint portion is also achieved. It becomes good.

  Further, as the powder component (B) component, for example, a powder component (B-2) (hereinafter referred to as “(B-2) component”) having high concealability such as titanium oxide or zinc oxide is appropriately mixed. May be. In this case, the proportion of the component (B-2) in the powder component (B) is preferably 5% by weight or less (preferably 3% by weight or less), although it depends on the coating thickness of the adhesive. . By using the component (B-2), it is possible to further improve the concealability after curing the adhesive (at the time of finishing). On the other hand, when it is more than 5% by weight, the concealability of the adhesive may become too high before the adhesive is cured (at the time of construction). Such a highly concealable powder has a powder refractive index of 1.8 to 3.0 and an average particle size of 0.1 μm to 1 μm.

  In the adhesive of the present invention, in addition to the above-described components, for example, fibers, thickeners, film-forming aids, leveling agents, wetting agents, plasticizers, antifreezing agents, pH adjusting agents, preservatives, An antifungal agent, an anti-algae agent, an antibacterial agent, a dispersant, an antifoaming agent, an adsorbent, a crosslinking agent, an ultraviolet absorber, an antioxidant, a catalyst, and the like may be contained. The adhesive of the present invention can be obtained by uniformly mixing such components by a conventional method.

In the adhesive of the present invention, the comparison of concealability before and after curing can be evaluated by the following method.
On the concealment rate test paper, the prepared adhesive is applied with a coating thickness of 0.5 mm, and a test body (I) which is dried and cured at a temperature of 23 ° C. and a relative humidity of 50% for 120 minutes is prepared. . Next, an adhesive is applied in the same procedure, and the concealability immediately after application (before curing, test body (II)) is visually compared with test body (I). In the present invention, it is evaluated that the concealing property is improved when the concealing property of the specimen (I) is relatively higher than the concealing property of the specimen (II).
Furthermore, the concealment rate before the adhesive is cured (test body (II)) can be quantified by the following method. A plurality of specimens having different concealment rates after curing are prepared in advance and used as a scale. The concealability of the scale and the test specimen (II) is compared and expressed as an approximate value.

The concealment rate when the adhesive of the present invention is finished (after curing of the adhesive) is preferably 60% or more (preferably 70% or more). When the concealment ratio is less than 60%, when the joint portion is provided on the base material and the plate-like decorative material is fixed, the ink marking line may be seen through the joint portion.
The concealment rate was determined by applying the prepared adhesive on the concealment rate test paper so that the coating thickness was 0.5 mm, and viewing the black and white ground coatings after curing the adhesive. The reflectance was measured and calculated using a color difference meter “CR-300” (manufactured by Minolta Co., Ltd.).

The present invention is a construction method for fixing a plate-like decorative material mainly to an interior / exterior base material of a building. For example, according to the construction method including the following steps, the plate-shaped decorative material can be easily bonded to a desired construction position, which is also preferable from the viewpoint of the effect of the adhesive of the present invention.
(1) First step: Inking on the substrate surface (drawing a reference line).
(2) Second step: An adhesive is applied to the surface of the inked substrate.
(3) Third step: The plate-shaped decorative material is pasted with a predetermined interval so that the adhesive is exposed between the plate-shaped decorative materials.
(4) Fourth step: the adhesive is cured.

  Specifically, the present invention can be applied to finishing walls, partitions, doors, ceilings and the like in houses, condominiums, schools, hospitals, stores, offices, factories, warehouses, and canteens. Examples of applicable base materials include gypsum board, plywood, concrete, mortar, porcelain tile, fiber-mixed cement board, cement calcium silicate board, slag cement perlite board, ALC board, siding board, extrusion board, steel sheet And a plastic plate. The surface of these base materials may have been subjected to some surface treatment (for example, putty, filler, etc.), may already have a coating film formed thereon, or may have already been pasted with wallpaper. .

  The ink marking may be performed by a known method. When inking, the position where each plate-shaped decorative material is attached may be determined as appropriate depending on the size of the plate-shaped decorative material. Stable construction can be performed by drawing a line on the base material by inking before applying the adhesive.

  The coating thickness at the time of applying the adhesive in the above (2) is usually about 0.2 to 1.0 mm. Moreover, when apply | coating an adhesive agent, the method using means, such as a roller, a scissors, a spatula, can be employ | adopted, for example. In the present invention, it is preferable to employ a method using cocoons. Here, if the viscosity of the adhesive is set to about 30 to 200 Pa · s (preferably 50 to 150 Pa · s), good workability can be obtained. In addition, the viscosity said here is a viscosity in 20 rpm by a BH type viscometer, and measurement temperature is 23 degreeC.

  In said (3), it does not specifically limit as a plate-shaped decoration material, Various plate-shaped decoration materials can be used. Examples thereof include those obtained by curing and molding a composition containing a synthetic resin and colored powder particles, or those obtained by embedding a woven fabric, non-woven fabric, glass cloth, synthetic paper or the like in these molded products. As the plate-like decorative material, those having various surface patterns such as marble tone, sandstone tone, wood grain tone, wood surface tone, metallic tone, embossed tone and the like can be used. The shape of the plate-like decorative material is usually a square, but other shapes may be used. The size of one side of the plate-shaped decorative material is approximately 50 to 3000 mm, and the thickness is approximately 1 to 10 mm.

  In addition, when a plate-shaped decorative material is pasted, adjacent plate-shaped building materials can be abutted and pasted so that the adhesive does not protrude, but when the effect of the adhesive of the present invention is manifested, It is preferable to provide joints between the decorative materials. Although the space | interval at the time of sticking a plate-shaped decoration material is not specifically limited, What is necessary is just about 0.5 mm-30 mm. In such a case, the adhesive can be exposed between the plate-shaped decorative materials, and the joint portion can be easily formed. Further, the adhesive at the joint may be smoothed with a spatula or the like.

  In the above (4), the ambient temperature when the adhesive is cured can be set as appropriate, but it is usually normal temperature.

  Test examples are shown below to clarify the features of the present invention.

In manufacturing the adhesive, the following raw materials were used.
-Aqueous resin (A): acrylic styrene emulsion
(Solid content 50% by weight, specific gravity 1.0)
-(B-1) component: See Table 1-(B-2) component: Titanium oxide (particle size 0.4 μm, specific gravity 4.2, oil absorption 22 g / 100 g, refractive index 2.58)
Component (B-3): Heavy calcium carbonate (particle diameter 50 μm, specific gravity 2.7, oil absorption 15 g / 100 g, refractive index 1.55)

  In the present invention, the specific gravity of the porous powder (B-1) is silica gel 2.2, diatomaceous earth 2.0, marlite 2.3, zeolite 2.1, and boehmite 2.0.

(Manufacture of adhesive-based composition)
By uniformly stirring and mixing 200 parts by weight of aqueous resin (A) (solid part 100 parts by weight), 30 parts by weight of dispersant, 85 parts by weight of thickener, 4 parts by weight of antifoaming agent, and 220 parts by weight of water. An adhesive base composition was prepared.

(Test Examples 1 to 23)
Adhesives 1 to 23 were produced by adding the powder component (B) to the adhesive base composition in the formulation shown in Tables 2 and 3. The following evaluation was implemented about the obtained adhesives 1-23.

-Evaluation 1: Using a test specimen obtained by applying and curing the prepared adhesive to a coating thickness of 0.5 mm on a concealment rate test paper, a black ground paint film and a white ground paint on the test specimen. The visual reflectance of the film was measured using a color difference meter “CR-300” (manufactured by Minolta Co., Ltd.) to calculate the concealment rate.

-Evaluation 2: The improvement of the concealment property of the ink line was visually evaluated at the time of construction and finishing (before and after curing of the adhesive) when the plate-shaped decorative material was constructed on the base material. The evaluation criteria are 4 stages (◎> ○) comparing before and after curing of the adhesive, with 隠 indicating improved concealment, ◯ indicating slightly improved, △ indicating unchanged, and × indicating decreased. > Δ> ×).

As the base material, a gypsum board of 1820 mm × 910 mm was used. In addition, as a plate-shaped decorative material, 200 parts by weight of an acrylic resin emulsion (solid content 50% by weight), 1000 parts by weight of a colored aggregate (white: brown: cream = 2: 3: 6), water and a thickener are added. The paste-like product obtained by mixing was poured into a sandstone mold, cured for 24 hours at 23 ° C. and then demolded (303 mm × 303 mm × 3 mm).
First, inking was performed on the substrate, and an adhesive was applied to the entire surface using a scissors so that the coating thickness was 0.5 mm. Next, the plate-shaped decorative material was attached with a joint of 10 mm so that the adhesive was exposed between the plate-shaped decorative materials, and the adhesive was cured.

Evaluation 3: According to JIS A 6909 “Flexibility test”, the flexibility was evaluated. The adhesive was applied to the zinc plate so that the coating thickness was 0.5 mm, and after the adhesive was cured, it was bent 90 ° with the coated surface facing outward, and then the presence or absence of cracks on the surface was visually evaluated. The evaluation criteria were two stages (◯> ×) where “O” indicates that there is no crack and “X” indicates that there is a crack.

Next, adhesion evaluation was performed using the adhesive 10 and the adhesive 21.
Evaluation 4: Adhesive strength was evaluated according to JIS A 5538 “Tensile Adhesive Strength Test for Wall Board Adhesive”.
A 70 mm × 150 mm gypsum board was used as the base material, an adhesive was applied to the base material, the plate-like decorative material used in Evaluation 2 was attached, and the plate was cured at 23 ° C. and 50 ± 10% RH for 3 days. A test specimen was used. A steel jig having a size of 40 mm × 40 mm was bonded to the above test body with a two-pack type epoxy resin adhesive. After 24 hours, along the steel jig, the periphery is cut to a size of 40 mm x 40 mm until it reaches the gypsum board, and the steel surface and the steel plate for lower tension are used to automate the sample surface vertically. The maximum tensile load was obtained by applying a tensile force in the graph. As a result, the adhesive 11 showed an adhesive strength about twice that of the adhesive 22.

Claims (3)

A construction method for fixing a plate-like decorative material to a base material,
A first step of marking the surface of the substrate;
A porous powder (B-1) containing an aqueous resin (A) and a powder component (B), having a pigment volume concentration of 30% or more, and having at least an oil absorption of 100 g / 100 g or more in the powder component (B). ), And when comparing before and after curing, a second step of applying an adhesive that improves concealment after curing,
Next, a third step of attaching the plate-shaped decorative material at a predetermined interval so that the adhesive is exposed between the plate-shaped decorative materials,
A fourth step of curing the adhesive;
Construction method of plate-like decoration material including   The board according to claim 1, wherein an adhesive in which at least 2% by weight or more of the powder component (B) is the porous powder (B-1) is used as the adhesive. How to apply a decorative material. Of the powder component (B), the powder component (B-2) having a refractive index of 1.8 to 3.0 and an average particle size of 0.1 μm to 1 μm is 5 wt% or less as the adhesive. The method for constructing a plate-like decorative material according to claim 1 or 2, wherein an adhesive is used.