JP4519469B2 - Wall remodeling method - Google Patents

Description

  The present invention relates to a wall surface remodeling method for inner wall surfaces, ceilings, outer wall surfaces, and the like.

  In recent years, water-based paints are often used for repainting inner wall surfaces, ceilings, outer wall surfaces, and the like of houses, offices, vehicles, and the like, from the viewpoints of environmental problems, fire fighting laws, and the like. However, the inner wall, ceiling, and outer wall are often contaminated with contaminants such as graffiti, cigarette smoke, hand dust, and oily smoke. By the time they are made, these contaminants may ooze onto the coating surface, which is called bleed. In particular, the smoke caused by cigarette smoke has a large amount of water-soluble components, and when a water-based paint is applied, it gradually bleeds, and the aesthetic appearance may be significantly impaired. In general, in order to prevent such bleed, an undercoat is applied such as a sealer. However, from the viewpoint of cost reduction, it is desired to omit the undercoat application process.

  In order to prevent this bleed, an indoor use in which a resin main component is a composition obtained by adding a hydrazide compound having at least two hydrazine residues per molecule as a crosslinking agent to an aqueous dispersion of a carbonyl group-containing copolymer. A water-based paint is disclosed. (For example, refer patent document 1.) Moreover, the aqueous emulsion coating material which contains hydrotalcite as a pigment component is disclosed. (For example, refer to Patent Document 2.) However, in either case, when the inner wall surface or ceiling is finished to be white or lightly colored, yellowing caused by bleed or bleeding is observed, or the obtained coating film bleeds. Even if it is prevented immediately after the formation of the coating film, the phenomenon of so-called rebleeding that gradually bleeds over time may occur, and the bleed prevention effect is insufficient.

By the way, an aqueous coating composition using aluminum dihydrogen tripolyphosphate as a deodorant is disclosed (for example, see Patent Document 3). This is to deodorize the odor generated with the evaporation of volatile bases and volatile components of volatile base compounds after the paint is applied. There is no suggestion.
Japanese Patent Laid-Open No. 5-43821 JP-A-6-207124 JP 2001-187868 A

  The object of the present invention is not to require priming to prevent bleed even when finished in white or light-coloured, and the inner wall, ceiling, and outside contaminated by cigarette smoke, hand dust, oil smoke, writing instruments, etc. It is to provide a wall surface renovation method suitable for a wall surface or the like.

The present invention relates to a wall renovation process for forming a coating film by applying the aqueous coating composition to the wall, the aqueous coating composition, a carboxylic acid group possess a curable functional group, acid value 10 30. A wall surface refurbishing method comprising 30 resin emulsions, a carbodiimide compound as a crosslinking agent, a color pigment, and condensed aluminum phosphate powder. Here, the surface of the wall surface may be one having a cloth or wallpaper attached thereto, or one having a coating film formed thereon. Moreover, it is preferable that content of condensed aluminum phosphate powder is 3-15 mass% in coating-material solid content, and it is further more preferable that condensed aluminum phosphate powder is an aluminum dihydrogen phosphate powder. Furthermore, the water-based coating composition may further contain a lightening agent.

  Moreover, this invention is a water-based coating composition characterized by being used for said wall surface remodeling method.

  Furthermore, the present invention is a wall surface coating method characterized in that a coating film is formed by coating the wall surface with the aqueous coating composition.

In the wall surface refurbishing method of the present invention, since the water-based coating composition used contains condensed aluminum phosphate powder, the inner wall surface contaminated by smoky smoke or the like without applying a primer for preventing bleeding, Even if it is directly applied to the ceiling and the outer wall surface, there is almost no bleed of these contaminants on the coating film surface, and no yellowing due to bleed is observed. This is considered to be because the bleed component is adsorbed by the condensed aluminum phosphate powder.
Therefore, even when the wall surface or the like is finished in white or light color, no undercoating is required for preventing bleeding.

  Since the water-based coating composition of the present invention is used in the above wall surface refurbishing method, the obtained coating film can prevent bleeding even if contaminants are attached to the wall surface, and a step of applying a primer. Can be omitted.

  The water-based paint composition, wall surface coating method and wall surface refurbishing method of the present invention are particularly effective for white or light-colored finishes in which bleeding is conspicuous.

  The wall surface refurbishing method of the present invention is a method for forming a coating film by applying an aqueous coating composition to a wall surface, wherein the aqueous coating composition comprises a resin emulsion having a curable functional group, a color pigment, and condensed phosphoric acid. It is characterized by containing aluminum powder.

  The wall surface is a part such as an inner wall surface, a ceiling and an outer wall surface of a house, office or vehicle already used, for example, concrete, wood, metal and a decorative board formed from these, Examples thereof include those in which a cloth such as vinyl cloth or cloth cloth or wallpaper is pasted on the surface of the wall surface, or in which a coating film is formed. The wall surface refurbishing method of the present invention can provide a high appearance without bleeding of these contaminants even if the inner wall surface, the ceiling, the outer wall surface, and the like are contaminated by dust from tobacco smoke.

  It does not specifically limit as said application | coating method, For example, application | coating with a brush, spray, a roller, etc. can be mentioned. After the application, the coating film can be obtained by standing or heating at room temperature and forcibly drying. In the case where the coating amount, the drying time, and the forced drying are performed, the drying temperature can be arbitrarily set according to the type of paint, the type of wall surface, and the state.

  The water-based paint composition used in the wall surface refurbishing method of the present invention is characterized by containing a resin emulsion, condensed aluminum phosphate powder and a color pigment. The resin emulsion has a curable functional group. The curable functional group is not particularly limited, and examples thereof include a hydroxyl group, a carboxylic acid group, and a carbonyl group. The above carbonyl group represents a group in which both ends of C═O are not bonded to a hetero atom such as an oxygen atom or a nitrogen atom. The resin emulsion can be obtained by emulsion polymerization of a monomer mixed solution containing the monomer having the curable functional group and another monomer by a conventional method.

  Specific examples of the monomer having a curable functional group include hydroxyl group-containing unsaturated monomers such as 2-hydroxymethyl (meth) acrylate and carboxylic acids such as (meth) acrylic acid, which are well known by those skilled in the art. Group-containing unsaturated monomers; carbonyl group-containing unsaturated monomers such as acetoacetoxyethyl (meth) acrylate; epoxy group-containing unsaturated monomers such as glycidyl methacrylate; amide group-containing unsaturated monomers such as diacetone (meth) acrylamide be able to.

  Specific examples of the other monomers include amino group-containing unsaturated monomers such as N, N-dimethylaminoethyl (meth) acrylate; (meth) acrylic acid alkyl esters such as methyl (meth) acrylate; styrene And nitriles such as (meth) acrylonitrile. Two or more of these monomers may be included as long as they do not react during polymerization.

  From the viewpoint of making it water-based and preventing rebleeding, the monomer mixture preferably contains the carboxylic acid group-containing monomer. Moreover, from the viewpoint of adhesion to the base, the monomer mixture liquid preferably further contains the carbonyl group-containing monomer.

  The monomer mixture may further contain a crosslinkable monomer or a chain transfer agent. The crosslinkable monomer is not particularly limited. Specifically, ethylene glycol di (meth) acrylate, divinylbenzene and the like are not particularly limited as the chain transfer agent, and specifically, alkyl such as lauryl mercaptan. Mercaptan; 2-ethylhexyl thioglycolate, α-methylstyrene dimer and the like well known by those skilled in the art can be mentioned.

  When the monomer mixture liquid contains a carboxylic acid group-containing monomer, the acid value is preferably 10-30. If it is out of the above range, there is a fear that the re-bleeding preventing power of the obtained coating film is insufficient. Moreover, when the said monomer liquid mixture contains a carbonyl group containing monomer, it is preferable that a carbonyl group value is 300-1200. If it is out of the above range, the adhesion of the resulting coating film to the ground may be insufficient. In the present specification and claims, the above carbonyl group value means the number of mg of carbonyl group and this mole of KOH contained per 1 g of resin solid content based on the same idea as the acid value. It is.

  Examples of the emulsion polymerization include persulfates such as ammonium persulfate; peroxides such as hydrogen peroxide; redox initiators such as a combination of a reducing agent such as Rongalite and an oxidizing agent such as the above initiator; Polymerization initiators such as azo compounds such as' -azobis-4-cyanovaleric acid can be used.

  The resin emulsion does not necessarily require a volatile basic compound such as amine or ammonia to be dispersed in water.

  The volume average particle diameter of the obtained resin emulsion is not particularly limited, and is, for example, 10 to 500 nm. The volume average particle diameter can be determined by a method well known by those skilled in the art, such as a laser light scattering method.

  The aqueous coating composition contains condensed aluminum phosphate powder. Examples of the condensed aluminum phosphate powder include rust preventive pigments used in rust-preventing paints, and specific examples include aluminum dihydrogen phosphate and aluminum metaphosphate.

  The condensed aluminum phosphate powder preferably has an average particle size of 1 to 10 μm. If the average particle size is less than 1 μm, the effect of the present invention may be insufficient, and if it exceeds 10 μm, the appearance of the resulting coating film may be deteriorated.

  Moreover, it is preferable that the surface of the condensed aluminum phosphate powder is stabilized with zinc in order to adapt it to an aqueous paint.

  From the viewpoint of bleed prevention and paint stability, the condensed aluminum phosphate powder is preferably aluminum dihydrogen triphosphate, and commercially available K-WHITE 80, 100 series (both manufactured by Teika) Can be mentioned.

  The content of the condensed aluminum phosphate powder is preferably 3% by mass or more and 30% by mass or less with respect to the solid content of the paint. If it is less than 3% by mass, the resulting coating film may be insufficiently prevented from bleeding, and if it exceeds 30% by mass, the paint properties and the appearance of the resulting coating film may be deteriorated. More preferably, it is 15 mass% or less.

  The aqueous coating composition contains a color pigment. The color pigment is not particularly limited, and examples thereof include inorganic pigments such as yellow iron oxide, iron oxide, carbon black, and titanium dioxide; azo chelate pigments, insoluble azo pigments, condensed azo pigments, phthalocyanine pigments, indigo pigments, Examples thereof include organic pigments such as perinone pigments, perylene pigments, dioxane pigments, quinacridone pigments, isoindolinone pigments, and metal complex pigments. Examples of the extender pigment include calcium carbonate, precipitated barium sulfate, clay, and talc.

  In addition, it is preferable that the pigment volume concentration of the said water-based coating composition is 50 to 200%, and it is further more preferable that it is 70 to 200%. If it is less than 50%, the resulting coating film may be insufficiently prevented from bleeding, and if it exceeds 200%, the appearance of the resulting coating film may be deteriorated. The calculation of the pigment volume concentration referred to here does not include the condensed aluminum phosphate powder. Thus, by increasing the pigment concentration, the hiding power can be increased, and a bleed-preventing effect against contaminants that do not dissolve in water can be further imparted.

  The water-based paint composition may further contain a weight reducing material. By including the lightening material, it can be expected that contaminants to bleed are adsorbed to the lightening material, and the prevention of bleeding can be further enhanced. The lightening material is not particularly limited, and examples thereof include those having a specific gravity of less than 1. Specific examples include hollow resin particles using a vinylidene chloride copolymer or an acrylonitrile copolymer as a shell wall material. The hollow resin particles preferably have an average particle diameter of 5 to 60 μm. If it is out of the above range, it may be difficult to achieve both the effect of the present invention and the appearance of the obtained coating film. The surface of the hollow resin particles may be coated with inorganic fine particles. Examples of commercially available ones include 80GCA, 80GTA, and 30STI (all manufactured by Matsumoto Yushi Seiyaku Co., Ltd.).

  In the aqueous coating composition, when the lightening material is included, the content of the lightening material is preferably 1% by mass or more and 6% by mass or less with respect to the solid content of the coating. If it is out of the above range, it may be difficult to achieve both the effect of the present invention and the appearance of the obtained coating film.

  The aqueous coating composition can contain a crosslinking agent. By containing a crosslinking agent and crosslinking the resulting coating film, the bleeding prevention effect can be further enhanced. The crosslinking agent can be selected according to the curable functional group of the resin emulsion, for example, when the resin emulsion has a carboxylic acid group, the crosslinking agent is a carbodiimide compound, Moreover, when it has a carbonyl group, it is preferable that the said crosslinking agent is a hydrazine compound. The said carbodiimide compound is not specifically limited, Specifically, the water-soluble thing and water-dispersible thing which have two or more carbodiimide groups in 1 molecule can be mentioned. Specific examples of the carbodiimide compounds that are commercially available include carbodilite V series that is a water-soluble type, E series that is an emulsion type (all manufactured by Nisshinbo Industries, Inc.), and the like. Further, the hydrazine compound is not particularly limited, and specifically, those having two or more hydrazine groups in one molecule, for example, oxalic acid dihydrazide, malonic acid dihydrazide, succinic acid dihydrazide, adipic acid dihydrazide, etc. Can be mentioned. The above crosslinking agents may be used in combination.

  In the aqueous coating composition, when the crosslinking agent is included, the content of the crosslinking agent is preferably 1% by mass or more and 5% by mass or less with respect to the solid content of the coating. If it is out of the above range, storage stability and water resistance of the resulting coating film may be lowered.

  In addition to the above-mentioned components, the above-mentioned water-based paint composition may contain an organic solvent, a plasticizer, a filler, a viscosity modifier, an antifoaming agent, a dispersant, an ultraviolet light inhibitor, a light stabilizer, a preservative, etc. be able to.

  The water-based coating composition can be obtained by stirring and mixing the above components using a device well known by those skilled in the art, such as a disper or a ball mill.

  The wall surface refurbishing method of the present invention can be performed without applying an undercoat such as a sealer for preventing bleeding before applying the aqueous coating composition. By doing so, the process can be omitted, which is economical. In addition, when contamination such as spears is particularly severe, the aqueous coating composition can be applied after applying the undercoat.

  The water-based coating composition of the present invention is used in the above-described wall surface remodeling method, and specific examples include those described in the above wall surface remodeling method.

  The wall surface coating method of the present invention is characterized in that a coating film is formed on the wall surface by applying the above aqueous coating composition.

Examples of the wall surface include inner wall surfaces, ceilings, and outer wall surfaces of houses, offices, vehicles, and the like, and specific examples include those described in the wall surface remodeling method.
For the coating method, the method for obtaining a coating film, the coating amount and the drying time, and the drying temperature in the case of forced drying, the description for the wall surface coating method can be applied.

  EXAMPLES Hereinafter, although a specific Example is given and this invention is demonstrated in detail, this invention is not limited by a following example. In the following description, “part” means “part by mass”.

Production Example 1 Production Method of Resin Emulsion In a separable flask equipped with a dropping funnel, a thermometer, a nitrogen inlet tube, a reflux condenser and a stirrer, 34.7 parts of ion-exchanged water, Pelex SS-H (alkyl diphenyl ether disulfone manufactured by Kao Corporation) Sodium acid) 0.5 part was charged, and heated to 80 ° C. under a nitrogen atmosphere. Acid value 13 consisting of 30 parts styrene, 17.5 parts 2-ethylhexyl acrylate, 32.5 parts methyl methacrylate, 2 parts acetoacetoxyethyl methacrylate, 20 parts butyl acrylate, 1 part acrylic acid and 1 part methacrylic acid. After adding 0.4 parts of dodecyl mercaptan to a certain monomer mixture, this is added to an emulsifier aqueous solution in which 4.1 parts of PELEX SS-H is dissolved in 25 parts of ion-exchanged water, and emulsified using a mixer. A pre-emulsion was prepared. The pre-emulsion thus obtained and an aqueous initiator solution in which 0.2 part of ammonium persulfate was dissolved in 1.0 part of ion-exchanged water were separated from a separate dropping funnel for 120 minutes for the former and 150 minutes for the latter. The dripping was started. After completion of the dropwise addition, the reaction was continued for an additional 120 minutes at the same temperature. After cooling, it was neutralized with aqueous ammonia. The neutralized product was filtered through a 200-mesh wire mesh to obtain a resin emulsion having an acid value of 13 and a solid content of 55%.

Production Example 2 Production of Substrate A After applying Hi Vinylex 70 (emulsion paint manufactured by Nippon Paint Co., Ltd.) with a wool roller at a coating amount of 0.15 / m ² × 2 on a 100 × 150 mm slate plate, The substrate A was obtained by leaving to dry at room temperature for 30 days.

Production Example 3 Preparation of Substrate B Substrate A obtained in Production Example 2 was allowed to stand in a desiccator containing a lit cigarette, and the surface of the substrate 1 was contaminated with cigarette dust to obtain a substrate B. . ΔE before standing in the desiccator and after contaminating the surface was 10-14. In addition, (DELTA) E was measured by CR-200 (Minolta color difference meter).

Example 1
100 parts of resin emulsion obtained in Production Example 1, 18 parts of film-forming aid, 125 parts of titanium dioxide , 55 parts of extender heavy calcium carbonate (manufactured by Maruo Calcium Co., Ltd.) , K-WHITE
24 parts of K-140W (Titaca aluminum dihydrogen phosphate powder whose surface is zinc-treated, average particle size: 2.7 μm) , and carbodilite EO-2 (Nisshinbo Co., Ltd., hydrophilized modified polycarbodiimide compound) as a crosslinking agent The aqueous emulsion composition 1 was obtained by blending the resin emulsion so that the molar ratio between the acid value of the resin emulsion and the carbodiimide group was 1/1 and sufficiently stirring with a disper. The pigment volume concentration of this paint was 72%.

The obtained aqueous coating composition 1 was applied to the substrate A obtained in Production Example ² with a brush at a coating amount of 0.15 Kg / m ² . After standing for 3 hours, the water-based coating composition 1 was applied under the same conditions and left at room temperature for 24 hours to obtain a reference plate.
Further, a test plate was obtained in the same manner for the substrate B obtained in Production Example 3.

Example 2
Furthermore, it was carried out similarly to Example 1 except having mix | blended 80GCA (Matsumoto Yushi Seiyaku Co., Ltd. hollow type resin particle, specific gravity 0.2, average particle diameter of 20 micrometers) so that it might become 8 mass% with respect to coating-material solid content. An aqueous coating composition 2 was obtained. The pigment volume concentration of this paint was 72%.
Further, in the same manner as in Example 1, a reference plate and a test plate were obtained.

Comparative Example 1
An aqueous coating composition 3 was obtained in the same manner as in Example 1 except that carbodilite EO-2 (hydrophilic modified polycarbodiimide compound manufactured by Nisshinbo Co., Ltd.) was not used. The pigment volume concentration of this paint was 72%.
Further, in the same manner as in Example 1, a reference plate and a test plate were obtained.

Comparative Example 2
K-WHITE K-WHITE instead of K-140W
Aqueous coating composition 4 was obtained in the same manner as in Example 1 except that # 105 (Titaca aluminum dihydrogen phosphate powder, average particle size 1.6 μm) was used and Carbodilite EO-2 was not used. . The pigment volume concentration of this paint was 72%.
Further, in the same manner as in Example 1, a reference plate and a test plate were obtained.

Comparative Example 3
A water-based coating composition 5 was obtained in the same manner as in Example 1 except that K-WHITE K-140W was not used. The pigment volume concentration of this paint was 70%.
Further, in the same manner as in Example 1, a reference plate and a test plate were obtained.

Comparative Example 4
An aqueous coating composition 6 was obtained in the same manner as in Example 1 except that Hi Vinylex 70 was used instead of the aqueous coating composition 1. The pigment volume concentration of this paint was 68%.
Further, in the same manner as in Example 1, a reference plate and a test plate were obtained.

Evaluation test The following evaluation tests were performed on each reference plate and each test plate. The obtained data are shown in Table 1.

(1) Color difference The color difference ΔE between each reference plate and each test plate was measured. The measurement was performed 3 times, and the average value was taken.

(2) Rebleed prevention property About each test board, the pure water was dripped so that it might become a diameter of about 10 mm on a coating film, and it was confirmed visually whether the spear bleeds in the dripping location.

表１の結果から明らかなように、縮合リン酸アルミニウム粉末を含んでいる水性塗料組成物は、色差および再ブリード防止性が良好であった（実施例１〜２および比較例１〜２）。特に、架橋剤を配合したもの（実施例１）および軽量化材を配合したもの（実施例２）は色差および再ブリード防止性が極めて良好であることがわかった。

As is clear from the results in Table 1, the aqueous coating composition containing the condensed aluminum phosphate powder had good color difference and rebleed prevention ( Examples 1-2 and Comparative Examples 1-2 ). In particular, it was found that those containing a cross-linking agent (Example 1 ) and those containing a weight reducing material (Example 2 ) had very good color difference and rebleeding prevention properties.

However, it was found that an aqueous coating composition containing no condensed aluminum phosphate powder has poor color difference and rebleed prevention (Comparative Examples 3 and 4 ).

  The wall surface refurbishing method of the present invention is suitable for inner wall surfaces, ceilings, outer wall surfaces, and the like contaminated with contaminants such as dust, hand dust, oil smoke, and writing instruments due to cigarette smoke.

Claims (7)

A wall surface refurbishing method in which a water-based paint composition is applied to a wall surface to form a coating film,
The aqueous coating composition is
A carboxylic acid group possess a curable functional group, acid value 10 to 30 of the resin emulsion,
A carbodiimide compound as a crosslinking agent,
A wall surface refurbishing method comprising a color pigment and condensed aluminum phosphate powder.   The wall surface refurbishing method according to claim 1, wherein a cloth or wallpaper is pasted or a coating film is formed on the surface of the wall surface.   The wall surface refurbishing method according to claim 1 or 2, wherein the content of the condensed aluminum phosphate powder is 3 to 15% by mass in the solid content of the paint.   The wall surface refurbishing method according to any one of claims 1 to 3, wherein the condensed aluminum phosphate powder is a tripolyaluminum dihydrogen phosphate powder.   The wall surface refurbishing method according to claim 1, wherein the water-based coating composition further includes a lightening agent.   A water-based paint composition used in the wall surface refurbishing method according to any one of claims 1 to 5.   A wall surface coating method comprising applying a water-based coating composition according to claim 6 to a wall surface to form a coating film.