JPH0144262B2 - - Google Patents

Description

[Detailed description of the invention]

<Industrial Application Field> The present invention relates to a top coating composition that is most suitable for repairing the surface wall surface of interior and exterior wall covering materials. <Prior art> Conventionally, when the surface wall surface of interior and exterior wall covering materials becomes dirty and it needs to be repaired, the following methods are used: (1) The contaminated surface wall surface is removed and a new wall surface is formed by painting. (2) Without removing the contaminated surface wall surface, apply an anti-accumulant over it and form a new wall surface on top of it by painting. methods have been adopted. <Problems to be solved by the invention> However, method (1) requires complete removal of the contaminated old surface wall, making it impossible to live in during the renovation period. The construction period is long. Construction costs are high. There were drawbacks such as: Particularly when repairing interior walls, there was the troublesome problem of not being able to live in the building and requiring another temporary residence. In addition, method (2) requires less effort than method (1) because it does not require the removal of contaminated old surface walls, but this method uses, for example, a cation emulsion and an adsorbent to Since this is applied as an anti-slip agent to old walls with the idea of absorbing and fixing dirt, it takes a long time to dry, and then a top coat must be applied over it, increasing construction time. However, there was still room for improvement in terms of construction costs. <Means for Solving the Problems> The present inventors have discovered that the contamination of the wall surfaces of the wall covering materials described above is caused by anionic water-soluble contaminants represented by lignin contained in wood and wall surfaces. If a coating composition containing a component that aggregates or gels (insolubilizes) lignin is used,
Contamination can be suppressed or prevented, and a new wall surface can be created by simply troweling or spraying it directly onto the old wall without removing the contaminated old wall or using an anti-acid agent. This invention was discovered after discovering what could be done. That is, the top coating composition of the present invention uses organic or inorganic fibrous materials, granular materials, flakes, or a mixture of these crushed materials and a pigment as the main material A, and the main material A and a cationic water-soluble material. The coating composition consisting of adhesive material B is the first invention, and the above-mentioned A
The second invention includes a coating composition consisting of B and aluminum metal salt C, and the third invention A includes a coating composition consisting of B and a cationic synthetic resin emulsion D.
The fourth invention is a coating composition in which B, C, and D are blended. <Function> As mentioned above, contamination of wood and old walls is caused by anionic water-soluble contaminants such as lignin contained in them. This method is characterized in that by directly coating the composition on the old wall, the contaminants are aggregated or gelled (insolubilized), and a new painted wall surface is formed on the old wall. Therefore, by simply using a cationic water-soluble adhesive such as a cationic polysaccharide, a polymerized cationic water-soluble resin, or a condensed cationic water-soluble resin as the cationic substance, it is possible to achieve both adhesion and anti-stick effects. However, if an aluminum metal salt such as aluminum sulfate is used in combination with this, the anti-stick effect will be further doubled. Moreover, even if a cationic synthetic resin emulsion is used in place of the aluminum metal salts, the effect of preventing oxidation can be obtained, and the strength is also improved. Therefore, although the cost is somewhat high, if you use the above-mentioned cationic water-soluble adhesive, aluminum metal salts, and cationic synthetic resin emulsion in combination, you can prevent scum, adhere to old walls, and improve strength. The best coating composition is obtained. In addition, in the above, if the anti-stick effect is satisfied with the cationic water-soluble glue material and the aluminum metal salts, and if the cationic synthetic resin emulsion is used simply for the purpose of improving strength, then this can be replaced with the cationic synthetic resin emulsion. Good too. The organic substance used as the main material in this invention,
Examples of inorganic fibrous materials, granular materials, and flake materials include powdered pulp, wood flour, powdered clay, natural sand as inorganic granular materials, inorganic rocks, inorganic minerals, and Granular or pulverized products such as pulverized mineral slag and ceramic products are used, and these may be used alone or as a mixture with pigments. Useful examples of aluminum metal salts include aluminum sulfate, aluminum acetate, polyaluminum chloride, and alum. In addition to this Al, other metal ions that aggregate, gel (insolubilize), and thicken anionic pollutants such as lignin include Fe ⁺⁺ , Cr ^+
+ , Ni ⁺⁺⁺ , Co ⁺⁺⁺ , Cu ⁺⁺⁺ , Zn ⁺⁺⁺ , Sn ⁺⁺⁺ , Cd ⁺⁺⁺ ,
Examples include Hg ⁺⁺ , but all of these are colored or toxic and are not suitable for the purpose of this invention. Next, as for the cationic synthetic resin emulsion, the types of polymers that make up the cationic emulsion include vinyl acetate resin, ethylene-vinyl acetate copolymer resin, acrylic-vinyl acetate copolymer resin, acrylic ester copolymer resin, and styrene-vinyl acetate resin.
There are acrylic ester copolymer resins, synthetic rubbers, etc. (1) These resins can be treated with cationic activators or
or emulsion made by emulsifying a cationic water-soluble resin as a protective colloid; (2) When producing these resins, aminoalkyl (meth)acrylate, vinyl pyridium halide, aminomethyl acrylamide, diallylammonium halide, etc. An emulsion made by copolymerizing cationic monomers and emulsifying them is suitable. As for the amount of cationic water-soluble adhesive to be added, in the case of a Kosa coating material, the amount of water suitable for troweling is determined by the material used (if a cationic synthetic resin emulsion is used in combination, (including water). For this amount of water, the cationic water-soluble adhesive gives the necessary viscosity for troweling, and this viscosity is suitably in the range of 1,000 to 10,000 cps. Furthermore, since cationic water-soluble glue materials vary in molecular weight, from low viscosity products to high viscosity products, it is preferable to define their addition by viscosity rather than by quantity. In addition, the molecular weight of the cationic water-soluble glue material is low,
If a suitable viscosity cannot be maintained, a high viscosity cationic or nonionic water-soluble adhesive may be added as a thickening agent. Next, it is appropriate to mix aluminum metal salts such as aluminum sulfate in an amount of 0.01 to 10 g per ¹ m2 of coating area of the trowel coating material in terms of aluminum oxide. There is no difference in the effectiveness of compositions consisting of the adhesive and aluminum. The amount of cationic synthetic resin emulsion added is preferably 30g per ^1m2 of coating area (100g per tsubo).
The upper limit is the amount of water used for the trowel coating material, moisture resistance,
It may be determined for necessary performance improvement such as adhesiveness and for economic reasons. In this invention, pigments used as one of the main materials together with organic or inorganic fibrous materials, granular materials, flakes, or crushed products thereof include inorganic materials such as clay, talc, iron oxide, chromium oxide, and titanium white. It is preferable to use organic pigments such as pigments, phthalocyanine green, phthalocyanine blue, and bisazo yellow. The coating composition of the present invention preferably has a PH of 8 or less, regardless of whether it is a composition according to claims 1, 3, 6 or 8. <Examples> The present invention will be explained below using examples. Example 1 A composition in which various cationic water-soluble sizing materials shown in Table 1 were blended with aggregate consisting of 70 parts by weight of pulverized pulp and 290 parts by weight of pulverized white polyester resin was mixed with 100 g of a 2% aqueous solution of lignin. m ² was applied to each dried test board with a trowel to a thickness of 1 m/m, and after drying at room temperature for 48 hours, the state of contamination was visually confirmed. The composition using the material (carboxymethyl cellulose soda salt) had brown staining, but the composition of this example had no staining at all and a beautiful white painted surface was obtained. These test plates were tested for moisture resistance and adhesion according to JISA-6908 "fibrous top coating materials", and the results are shown in Table 1.

【table】

[Table] Example 2 In Table 1 of Example 1, experiment number 3, that is, the composition in which cationic starch was added to the aggregate, was mixed with 0.01 part of sulfate in terms of aluminum oxide, as shown in Table 2. A 5% aqueous solution of lignin (100 g/m ^{2 )} was applied to a composition containing 0.1 part, 1.0 part, and 10.0 parts, respectively, and then troweled onto a dried test board to a thickness of 1 m/m, and dried at room temperature for 48 hours. When we visually observed the state of contamination, we found that in Experiment No. 3, there was dull light brown contamination, but in this example, which contained sulfuric acid band, all the surfaces had a beautiful white painted surface. I got it. Further, when physical property tests similar to those in Example 1 were conducted on these test plates, the results shown in Table 2 were obtained. In addition, similar experiments were conducted using other aluminum metal salts such as aluminum acetate, basic aluminum acetate, potassium acetate, and polyaluminum chloride instead of sulfuric acid.
Results similar to those for the sulfate band shown in the table were obtained.

[Table] Example 3 Various cationic synthetic resin emulsions shown in Table 3 were blended with the composition of Experiment No. 3 in Table 1 in Example 1, and each was mixed with a 5% aqueous solution of lignin.
100 g/m ² was coated on a dried test board, and the test board was coated with a trowel to a thickness of 1 m/m, dried at room temperature for 48 hours, and the state of contamination was visually observed. Smooth and light brown staining was observed, but the composition using the cationic synthetic resin emulsion provided a beautiful white painted surface. In addition, when we conducted a moisture resistance test on JISA-6908 "fibrous topcoat materials", as shown in Table 3, the adhesive strength of this example using a cationic synthetic resin emulsion improved as the amount of the emulsion increased. It was approved to do so. In Table 3, 30 g/m ² and 300 g/m ² were selected as the compounding amount of the cationic synthetic resin emulsion, but when the trowel coating material of this invention is commercially available, the minimum packaging unit is 1 tsubo (3.3 m ² ), and the synthetic resin emulsion that is usually attached for 1 tsubo has a minimum weight of 100g, and the maximum rarely exceeds 1000g. Since 100g/tsubo is 30g/ ^m2 and 1000g/tsubo is 300g/ ^m2 ,
This amount was selected and the experiment was conducted.

[Table] Example 4 Experiment number 8 in Table 2 in Example 2
The various cationic synthetic resin emulsions shown in the table were blended, and each was mixed with 200 g of a 5% aqueous solution of lignin/
^After coating and drying the test board, it was applied with a trowel to a thickness of 1 m/m and dried at room temperature for 48 hours. We then visually observed the state of contamination on each test plate.
The coating coated with the composition of Experiment No. 8 had dull, pale brown stains, but the coating of this example using the cationic synthetic resin emulsion had a beautiful coated surface free of stains. When the same physical property tests as in Example 1 were conducted on this painted surface, the results shown in Table 4 were obtained, and it was recognized that the adhesive strength improved as the amount of emulsion increased.

【table】

[Table] Example 5 Experiment number 11 in Table 3 in Example 3
Blend 0.1, 1.0, 10, and 50 parts of the sulfuric acid band shown in the table in terms of aluminum oxide, and apply each to a 1 m/m thick test plate coated with 200 g/m ² of a 5% lignin aqueous solution and dried. After coating and drying at room temperature for 48 hours, we visually observed the state of contamination.
The composition of Experiment No. 11 was coated with faint light brown stains, but the composition containing sulfuric acid gave a beautiful white painted surface free of stains. The physical property test results for these test plates are shown in the fifth
Shown in the table.

[Table] <Effects of the Invention> As detailed above, this invention uses a cationic water-soluble glue material, aluminum metal salts, and a cationic synthetic resin emulsion in the main materials consisting of organic and inorganic aggregates and pigments. A coating composition containing one or more of the following, which causes anionic water-soluble pollutants such as lignin contained in wood and old walls to be aggregated and gelled (insolubilized) by the cationic substance. This is to prevent the occurrence of contamination and to form a new wall surface on top of the old wall.

Claims (1)

[Scope of Claims] 1 The main material is an organic or inorganic fibrous material, granular material, flake material, or a mixture of a pulverized product thereof and a pigment, and the main material and a cationized polysaccharide, a polymeric cationic material, etc. A top coating composition comprising at least one cationic water-soluble glue selected from a water-soluble resin and a condensation-linked cationic water-soluble resin. 2 The main material is an organic or inorganic fibrous material, granular material, flake material, or a mixture of these crushed products and a pigment, and the main material is combined with a cationized polysaccharide, a polymeric cationic water-soluble resin, and a condensation system. At least one cationic water-soluble glue among cationic water-soluble resins and aluminum sulfate,
A top coating composition comprising at least one aluminum metal salt selected from aluminum acetate, polyaluminum chloride, and alum. 3 The main material is an organic or inorganic fibrous material, granular material, flake material, or a mixture of these crushed products and a pigment, and the main material is combined with a cationized polysaccharide, a polymeric cationic water-soluble resin, and a condensation system. A top coating composition comprising at least one cationic water-soluble glue among cationic water-soluble resins and a cationic synthetic resin emulsion. 4 The main material is an organic or inorganic fibrous material, granular material, flake material, or a mixture of these crushed products and a pigment, and the main material is combined with a cationized polysaccharide, a polymeric cationic water-soluble resin, or a condensation system. It consists of at least one cationic water-soluble glue among cationic water-soluble resins, at least one aluminum metal salt among aluminum sulfate, aluminum acetate, polyaluminum chloride, and alum, and a cationic synthetic resin emulsion. Characteristic topcoat coating composition.