JP6177657B2 - Sand wall-like water-based paint composition and construction method thereof - Google Patents

Description

  The present invention is a one-pack type water-based paint composition that mainly imparts design properties to the inner and outer walls of a building. Specifically, it is applied to the inner and outer walls of a building by spray painting to give a unique sand wall-like texture. The present invention relates to a sand-walled water-based paint composition having the construction method.

  Conventionally, as a sand wall-like paint composition that gives sand wall-like texture to the inner and outer wall surfaces of a building, it is a paint composition containing a synthetic resin emulsion, a filler, a pigment, and a film-forming aid, and the average particle of the filler A sand wall-like paint characterized in that a value obtained by dividing the weight blending part of the filler having an average particle diameter of 70 to 500 μm by the weight blending part of the filler having a diameter of 1.0 to 40 μm is 0.1 to 5.0. A composition has been proposed (Patent Document 1).

  Such a sand wall paint composition is a sand wall paint composition that can be applied for the purpose of refurbishment on a design coating material that has already been finished with uneven plaster walls by plasterers on the inner and outer walls of the building. Even if it is applied on a textured finish coating material typified by the thin finish coating material E defined in the existing JIS A 6909 building finish coating material, It is a sand wall paint composition that does not impair the texture, and can be applied not only to an existing coating material for the purpose of refurbishment but also to a new base.

JP 2010-248304 A

  However, even though the sand wall paint composition according to Patent Document 1 has a sand wall design, movement is caused by a newly built structure whose ground is still unstable, vibration due to vehicle traffic, and wind pulsations. When it is directly applied to the wall base of a building, there is a problem that a crack may occur at the abutting portion of the wall base that is in particular abutment.

  The problem to be solved by the present invention is that a crack or a pinhole may occur in the abutting portion even when the wall base that is abutting has a movement while having a sand wall-like design. An object of the present invention is to provide a sand-walled water-based paint composition and a method for this construction.

The invention described in claim 1 includes an acrylic resin emulsion having a glass transition temperature of −20 ° C. or more and less than 10 ° C., an aggregate (A) having an average particle size of 100 μm or more and less than 250 μm, and an average particle size of 700 μm or more and less than 1200 μm. Aggregate (B), an elastic chip made of an ethylene vinyl acetate copolymer resin having a particle size of 0.3 mm to 2.0 mm, a pigment, a filler having an average particle size of less than 100 μm, and a thickener And a film forming aid, wherein the elastic tip is 1.5 to 3.5 parts by weight with respect to 100 parts by weight of the whole composition, and can be applied by spraying. Offer things.

  According to a second aspect of the present invention, there is provided the sand wall-like water-based paint composition according to the first aspect, characterized in that the aggregate is composed of cryogenic stone.

  Invention of Claim 3 provides the construction method of the sand-wall-like water-based coating composition characterized by spraying and applying the sand-wall-like water-based coating composition of Claim 1 or Claim 2.

The sand wall-like water-based paint composition of the present invention and this construction method have the effect of having a unique sand wall-like design, and even when a movement occurs on the wall base that is abutting, the abutting portion This has the effect of preventing cracks and pinholes.

The present invention will be described in detail below.
The sand wall-like water-based paint composition of the present invention has an acrylic resin emulsion having a glass transition temperature of -20 ° C. or higher and lower than 10 ° C., an aggregate having an average particle size of 100 μm or more and less than 200 μm, and a particle size of 0.3 mm or more and 2 It consists of an elastic chip made of an ethylene vinyl acetate copolymer resin of less than 0.0 mm, a pigment, a filler having an average particle diameter of less than 100 μm, a thickener, and a film forming aid, and can be applied by spraying. If necessary, additives such as a dispersant, an antifoaming agent, an algae / antifungal agent and the like are blended.

Acrylic resin emulsion having a glass transition temperature of −20 ° C. or more and less than 10 ° C. The acrylic resin emulsion having a glass transition temperature of −20 ° C. or more and less than 10 ° C. used in the present invention includes an acrylic ester copolymer resin, vinyl acetate, Aqueous acrylic resin emulsions such as acrylic ester copolymer resins and silicon-modified acrylic resins can be used, and the glass transition temperature is −20 ° C. or higher and lower than 10 ° C. When the glass transition temperature is less than −20 ° C., the weather resistance and stain resistance are lowered, and when the glass transition temperature is 10 ° C. or more, pinholes are generated in the zero span tension test described later. More preferably, it is −20 ° C. or higher and lower than 0 ° C., and if it is 0 ° C. or higher, pinholes tend to be generated in the zero span tension test described later. As an acrylic resin emulsion having a commercially available glass transition temperature of −20 ° C. or more and less than 10 ° C., Ultrazol UL-1097 (trade name, solid content 51%, acrylate copolymer resin, glass transition temperature: −16 ° C., Aika Industry Co., Ltd.).

  The weight blending percentage of the acrylic resin emulsion is 8% or more and less than 13% by weight as a solid content with respect to 100 parts by weight of the whole composition, and if it is less than 8% by weight, a pinhole is generated in the zero span tension test described later. There is a tendency, and if it is 13% by weight or more, the design property relating to the unevenness of the coating film after spray coating becomes insufficient and the sand wall shape is lost.

Aggregate (A) having an average particle size of 100 μm or more and less than 250 μm, and Aggregate (B) having an average particle size of 700 μm or more and less than 1200 μm
The aggregate (A) having an average particle diameter of 100 μm or more and less than 250 μm and the aggregate (B) having an average particle diameter of 700 μm or more and less than 1200 μm used in the present invention are distinguished from the filler by the size of the average particle diameter. In the present specification, an aggregate having an average particle diameter of 100 μm or more is referred to as an aggregate, and the average particle diameter in the present specification refers to a particle diameter having a cumulative cumulative weight of 50%. As an aggregate (A) having an average particle diameter of 100 μm or more and less than 250 μm, there is K-250 (heavy calcium carbonate, manufactured by Asahi Sue Co., Ltd., average particle diameter of 200 μm), and an average particle diameter of 700 μm or more and less than 1200 μm. As the material (B), there is Kousuiishi JF-3 (trade name, average particle diameter of 0.9 mm, manufactured by Aika Industry Co., Ltd.). In addition, glass, cinnabar, silica, talc, clay and the like can also be used.

  The weight percentage of the aggregate (A) having an average particle diameter of 100 μm or more and less than 250 μm is preferably 20% by weight or more and less than 35% by weight with respect to 100 parts by weight of the whole composition, and if it is less than 25% by weight, spray coating is performed. The design property relating to the unevenness of the subsequent coating film becomes insufficient, and the sand wall shape is lost, and if it is 35% by weight or more, it becomes difficult to apply by spraying.

  The weight percentage of the aggregate (B) having an average particle size of 700 μm or more and less than 1200 μm is preferably 15% by weight or more and less than 30% by weight with respect to 100 parts by weight of the whole composition. The design property relating to the unevenness of the coating film becomes insufficient and the sand wall shape is lost, and if it is 30% by weight or more, it is difficult to spray and apply.

Elastic chip made of ethylene vinyl acetate copolymer resin having a particle size of 0.3 mm or more and less than 2.0 mm The elastic chip made of ethylene vinyl acetate copolymer resin used in the present invention has a particle size of 0.3 mm or more and 2.0 mm. It is as follows. If the particle size is less than 0.3 mm, there is a tendency for pinholes to occur in the zero span tension test described later, and if it exceeds 2.0 mm, the design properties related to the unevenness of the coated film after coating are insufficient and the sand wall shape is lost. Spray coating becomes difficult. The blending percentage by weight of the elastic tip is preferably 1.5% by weight or more and less than 3.5% by weight with respect to 100 parts by weight of the entire composition, and if it is less than 1.5% by weight, pinholes are generated in the zero span tension test, If it is 3.5% by weight or more, the sprayability becomes poor. The commercially available elastic chip includes W-9N (trade name, particle size: 0.3 to 2.0 mm, pulverized ethylene vinyl acetate copolymer foam, manufactured by Iwasaki Wall Materials Co., Ltd.).

Filler having an average particle size of less than 100 μm The filler having an average particle size of less than 100 μm used in the present invention is blended for the purpose of adjusting the viscosity and spray coating properties of the composition, Although clay, kaolin, talc, precipitated barium sulfate, barium carbonate, cinnabar powder, etc. can be used, heavy calcium carbonate is inexpensive and easily available. Examples of the commercially available filler include Whiten SB (trade name, average particle diameter of 2 μm, heavy calcium carbonate, manufactured by Shiroishi Calcium Co., Ltd.).

  The blending percentage by weight of the filler is preferably 3% by weight or more and less than 10% by weight with respect to 100 parts by weight of the whole composition. Thus, it is no longer in the form of a sand wall, and if it is 10% by weight or more, the sprayability becomes poor. More preferably, it is 5% by weight or more and less than 7% by weight.

Pigment The pigment used in the present invention is used for coloring the composition, such as titanium oxide, zinc oxide, carbon black, ferric oxide (valve), lead chromate, yellow lead, yellow iron oxide, etc. Inorganic pigments can be used. In particular, titanium oxide can be used as the main pigment because it is excellent in concealment of the base and white.

Thickener The thickener used in the present invention is blended to prevent dripping of the paint after spraying and to improve water retention, water-soluble cellulose ether, urethane-modified polyol, polycarboxylic acid Etc. can be used. An example of a commercially available water-soluble cellulose ether is PMC-15US (trade name, manufactured by Sakai Kogyo Co., Ltd.). The weight blending percentage of the thickener is preferably 0.1 or more and less than 2% by weight with respect to 100 parts by weight of the whole composition, and if it is less than 0.1% by weight, the paint after spraying will sag. If it is more than% by weight, the spraying workability decreases.

Film forming aid The film forming aid used in the present invention is formulated for the purpose of promoting the fusion of the resin particles of the acrylic resin emulsion and forming a uniform film with the acrylic resin, ethylene glycol diethyl ether, Benzyl alcohol, butyl cellosolve, ester alcohol and the like are used. Commercially available film forming aids include CS-12 (trade name, Texanol, manufactured by Chisso Corporation). The blending percentage of the film forming aid is preferably 0.5% by weight or more and less than 5% by weight with respect to 100 parts by weight of the entire composition. If it is less than 0.5% by weight, film formation is insufficient, and if it is 5% by weight or more, drying of the coating film is delayed.

Spray coating The sand wall-shaped water-based paint composition of the present invention is spray-coated, but a sealer is previously applied to the construction base in order to prevent inhalation of the sand-walled water-based paint composition to be applied and to ensure adhesion. It is preferable that The coating amount of the sand wall shape aqueous coating composition of the present invention is 1.0 kg / ^{m 2} or more 2.0 kg / ^m less than ² as a whole, spray coating is applied in two. Therefore, the coating amount at one time is 0.5 kg / m ² or more and less than 1.0 kg / m ² . The instrument used for spray application is preferably a ricin gun, and the spray pressure at that time is 4 kgf / m ² or more and less than 7 kgf / m ² .

  In addition to the above ingredients, anti-foaming agents to dissipate foam caused by entrainment in coating materials, dispersing agents to uniformly disperse fillers and pigments, and other anti-algae and anti-fungal agents May be blended.

  The sand wall-shaped water-based paint composition of the present invention is applied by spray coating as described above, and the appropriate viscosity of the sand wall-shaped water-based paint composition is preferably 100 to 250 Pa · s / 23 ° C. To obtain a viscosity, it can be prepared by adding an appropriate amount of water.

  Examples and Comparative Examples are shown below, but the present invention is not limited to these Examples.

Examples and Comparative Examples Ultrazol UL-1097 in acrylic resin emulsion A, YJ1555Dap in acrylic resin emulsion B (glass transition temperature 16 ° C., solid content 56%, acrylate copolymer resin, manufactured by BASF Japan Ltd., trade name) ), CS-12 as a film-forming aid, K-250 as an aggregate A, Cryze JF-3 as an aggregate B, Whiten SB as a filler, Titanium oxide Taipur R-960 (as a pigment) (Trade name, manufactured by DuPont Co., Ltd.), PMC-15US as a thickener, and an antifoaming agent, a dispersant, an algae / antifungal agent effective when these are mixed in an additive, Table 1 The sand wall-like water-based paint compositions of Examples 1 to 3 and Comparative Examples 1 to 5 were obtained.

Evaluation items and evaluation methods

After installing two flexible boards (70 x 70 x 8 mm thickness) specified by JISA 5430 as the zero-span tension base, solvent chlorinated rubber base coat JS-410 (trade name, solid content 16%, Aika Industry) 0.2 kg / m ^{2 is} applied and dried for 4 hours or more. Thereafter, the lysing gun MB-2 (trade name, manufactured by Meiji Machinery Co., Ltd.) was used for the sand wall-like water-based paint compositions of Examples 1 to 3 and Comparative Examples 1 to 5 at a coating amount of 0.8 kg / m ² . Then, spraying was applied with a diameter of 6 mm and a pressure of 6 kgf / m ² , and curing was performed at 23 ° C. and 50 RH% for 12 hours. Thereafter, the same sand-walled water-based paint compositions of Examples 1 to 3 and Comparative Examples 1 to 5 were sprayed in the same manner at a coating amount of 0.8 kg / m ^{2 and} cured at 23 ° C. and 50 RH% for 14 days. A test specimen was obtained. Three test specimens were prepared, and using a 1 kN load cell with an Instron tensile tester (Instron 5582, manufactured by Instron Japan), the specimen was pulled at a pulling speed of 2 mm / min, and a pinhole was formed in the coating film. When the displacement occurred, a displacement of 0.6 mm or more was evaluated as ◯, and a displacement less than that was evaluated as ×.

As a design base, a water-based acrylic resin-based primer (JS-90, solid content 50%, manufactured by Aika Kogyo Co., Ltd.) is applied as a sealer to plywood (200 mm × 300 mm) at 0.2 kg / m ² for 4 hours or more. After drying, the sand-walled aqueous coating compositions of Examples 1 to 3 and Comparative Examples 1 to 5 were blown at a coating pressure of 0.8 kg / m ² using a ricin gun at a pressure of 6 kgf / m ² . It was then applied and cured at 23 ° C. and 50 RH% for 12 hours. Thereafter, the same sand-walled water-based paint compositions of Examples 1 to 3 and Comparative Examples 1 to 5 were sprayed in the same manner at a coating amount of 0.8 kg / m ^{2 and} cured at 23 ° C. and 50 RH% for 14 days. A test specimen was obtained. The test body was visually observed, and a sample having a sand wall-like texture was evaluated as ◯, and a sample having resin gloss was evaluated as ×.

Spraying of Examples 1 to 3 and Comparative Examples 1 to the sand wall shape aqueous coating composition of Comparative Example 5 texture gun MB-2 (trade name, Meijikikai Seisakusho) was used to diameter 6 mm, the pressure 6kgf When sprayed at / m ^{2, the case} where clogging did not occur was evaluated as ◯, and the case where clogging occurred was evaluated as ×.

Evaluation results The evaluation results are shown in Table 2.

Summary In Example 1 to Example 3, all evaluation items were “good”.

Claims (3)

An acrylic resin emulsion having a glass transition temperature of −20 ° C. or more and less than 10 ° C., an aggregate (A) having an average particle diameter of 100 μm or more and less than 250 μm, an aggregate (B) having an average particle diameter of 700 μm or more and less than 1200 μm, From an elastic chip made of an ethylene vinyl acetate copolymer resin having a particle size of 0.3 mm or more and 2.0 mm or less, a pigment, a filler having an average particle size of less than 100 μm, a thickener, and a film forming aid. The sandy-walled water-based paint composition is characterized in that the elastic chip is 1.5 to 3.5 parts by weight with respect to 100 parts by weight of the whole composition and can be applied by spraying.   The sand-walled water-based paint composition according to claim 1, wherein the aggregate is made of cold water stone. A construction method of a sand wall-shaped water-based paint composition, characterized by spraying and applying the sand-wall-shaped water-based paint composition according to claim 1.