JP3378735B2 - Sandstone-like coating film forming composition and method for forming the same - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a composition for forming a natural sandstone-like coating film on the surface of an object to be coated and a method for forming the composition.

[0002]

2. Description of the Related Art Conventionally, various coating materials capable of expressing a design feeling similar to natural stone have been used for buildings, civil engineering structures, etc. without using heavy materials such as natural stone and materials which are inconvenient to process. It is constructed on the surface. As such natural stone-like coating materials, there are natural sandstone-like materials as well as granite and marble-like materials. This natural sandstone tone is characterized by irregular surface irregularities such as the cracked surface of sedimentary rock and the rough texture of the surface made of gravel. The natural sandstone-like coating material is a composition that forms such a natural sandstone-like coating film, and one of the methods for forming the irregular surface shape is trowel coating by a plasterer. In such a trowel coating, a natural sandstone-like coating material is previously applied to an object to be smoothed, and immediately after that, a pattern is formed while the coating material is partially distributed with a trowel. On the other hand, it is also possible to form a natural sandstone-like coating film by pouring a natural sandstone-like coating material into an artificial mold obtained by molding the surface shape of natural sandstone and then removing from the mold after drying.

[0003]

For such natural sandstone tone coating material, in the case of on-site construction, iron coating is often used among the above-mentioned methods. In such ironing work, the natural sandstone coating material is applied to a thickness of about several mm, and the iron is used to impart an irregular surface uneven shape, so that it is necessary to easily form a pattern with the iron. The ease of pattern formation with a trowel means that the coating material is light and spreads smoothly with the trowel, there is no adhesion to the trowel, the pattern is well separated when the trowel is separated from the coating material, It is that the cutting is good, and the formed uneven pattern does not collapse due to the dripping of the coating material, and it dries and cures relatively quickly. However, in the case of a coating material that is dried quickly, the surface of the formed natural sandstone-like coating film may be cracked by the rapid drying.

[0004] Therefore, an object of the present invention is to provide, Ri by the troweling, it is possible to form a natural sandstone tone coating film, particularly in the construction by troweling, easy pattern formation is very done by trowel The purpose of the present invention is to obtain a composition which is a coating material excellent in workability in that the formed pattern does not collapse due to sagging, and which is excellent in its drying property and does not cause surface cracking or skinning.

[0005]

In order to solve the above problems, the inventors of the present invention have used a synthetic resin emulsion, a colored aggregate, and an inorganic powder as a basic composition for forming a natural sandstone-like coating film. As the composition of the composition, among these, the colored aggregate and the particle size of the inorganic powder are specified, and further, as the synthetic fiber,
Invented to use a specific one.

That is, with respect to 100 parts by weight of the solid content of the synthetic resin emulsion, 5 to 15 parts by weight of synthetic fibers having an average fiber length of 0.5 to 5 mm and a fineness of 0.5 to 10 denier and a particle size of 50 to 500 μm or less. 100 to 60 colored aggregate
0 parts by weight, 100 to 100 parts of inorganic powder having a particle size of 50 to 1000 μm
600 parts by weight, containing polyethylene oxide in a solid content of 1 to 10 parts by weight, and the weight ratio of the colored aggregate to the inorganic powder is 6: 1 to
It is characterized by being 1: 6.

Further, in the present invention, in order to make the uneven pattern formed more difficult to sag and to further improve the water resistance, the polyamidoamine epichlorohydrin resin may be further contained in a solid content of 0.5 to 5 parts by weight. good.

In the actual use of the present invention,
Water is added to each of the above-mentioned components as needed, and in that case, the ratio of the solid content in the whole composition in which water is mixed is in the range of 60 to 90%, and both ironing and pouring are optimal. Liquidity is adjusted.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The synthetic resin emulsion used in the present invention is obtained by emulsion polymerization of a monomer having a polymerizable unsaturated double bond, or a resin synthesized in advance is used as a dispersant in an aqueous dispersion medium. It may be any of those dispersed by using, and may be a powder type emulsion. However, in the case of the powder type, it is essential to add water at the time of use.

The types of these emulsions are polyvinyl acetate type, polyacrylic acid ester type, acrylic-styrene copolymer system, ethylene-vinyl acetate copolymer system, vinyl acetate-acrylic copolymer system, ethylene-vinyl chloride copolymer. System, vinyl acetate-veova copolymer, and the like.

Average fiber length 0.5 to 5 mm, fineness 0.5
The synthetic fiber having a denier of 10 to 10 is not particularly limited as long as the average fiber length and the fineness are within this range. Here, the fineness is an index showing the thickness of the fiber, and is expressed by denier which represents the number of grams of the mass per 9,000 m in length.

Fibers satisfying such conditions include, for example, polyester fiber, nylon, vinylon, viscose rayon and the like.

The colored aggregate having a particle size within the range of 50 to 500 μm is not particularly limited as long as it has a particle size within this range and is colored, and it is heat-resistant on the surface of granular materials such as silica sand, crushed stone and glass beads. A method in which a sodium silicate-based binder containing highly effective pigments is baked at high temperature, and a baking coating with aminoalkyd resin paint is applied.
A coloring lacquer that eliminates the baking step, and, in consideration of weather resistance, consists of a siloxane cross-linking reactive oligomer that has an alkoxysilyl group as a functional group and has an acrylic main chain, a pigment, and a curing agent. Appropriately used products are those which are colored and coated with a coloring material, pulverized products of ceramics that are fired together with pigments, pulverized products of colored natural stones, and the like.

The inorganic powder having a particle size of 50 to 1000 μm includes heavy calcium carbonate, kaolin, talc, clay,
They are cold water stone, diatomaceous earth, quartz powder, silica sand, barite powder, wollastonite, etc., and are not particularly limited as long as the average particle size is within this range.

Polyethylene oxide is a high-molecular polymer obtained by connecting ethylene oxide molecules in the order of 10,000 to several hundreds of thousands, and has a number of repeating ethylene oxide moieties of about 300 or more.

Next, a polyamide polyamine epichlorohydrin resin is, for example, a polyamide polyamine epichlorohydrin obtained by reacting a low molecular weight polyamide polyamine obtained by condensing an aliphatic dicarboxylic acid with a polyalkylene polyamine with epichlorohydrin in an aqueous solution, or diethylamino. Polymer or copolymer dispersions of epichlorohydrin adducts such as propylacrylamide, dimethylaminoethylacrylamide, dimethylaminoethylmethacrylamide, and other aminoacrylamides and aminomethacrylamides, or an ethylenically unsaturated bond having a water-soluble functional group Examples thereof include water-soluble resins obtained by copolymerization with the contained monomers.

The composition of the present invention is prepared by mixing these or from these, and as described above, it is preferably 6: 1 to 1: 6. This is because, in the case of this range, the ironing workability is improved and the sedimentation of the aggregate is reduced due to the relationship between the aggregate particle diameter and the mixture ratio, the specific gravity of the resin, and the mixture ratio.

In the composition of the present invention, the ratio of the respective constituents of to must be within the above range with respect to 100 parts by weight of the synthetic resin emulsion. If each component deviates from this range, the drying property may be reduced, surface cracks may easily occur, or the spread may be poor in the case of construction with a trowel, so that the effect of the present invention is sufficiently obtained. Can't do it. For example, when the amount of the synthetic fiber is more than the specified range of the present invention, the paint becomes dull during the trowel coating, which makes it difficult to move the trowel smoothly, and as a result, it becomes difficult to form a sandstone-like uneven pattern. On the other hand, when the amount of synthetic fibers is less than the range specified in the present invention, the sag of the uneven pattern and cracks on the surface are generated. The poor spreadability during ironing also occurs when the polyethylene oxide content is low.
Further, when the amount of the aggregate is small, surface cracks are likely to occur, and when the amount of the aggregate is large, the composition becomes sticky, and the spread at the time of iron coating is deteriorated.

In the composition of the present invention, various additives which can be usually added to such a coating material, that is, a plasticizer, a preservative, an antifungal agent, an antialgal agent, an antifoaming agent, and a dispersant. ,
Thickeners, anti-settling agents, flame retardants, etc., pigments and dyes can be added to the extent that the effects of the present invention are not impaired.

The actual application of the composition of the present invention is to remix the premixed composition on site with a hand mixer and apply a trowel. When plastering, a plasterer's handwork is used to form a natural sandstone-like uneven pattern. In this case, a plurality of different-colored compositions may be produced, and after appropriately coating the different-colored compositions with a trowel, the boundary portions may be leveled to give a multicolored appearance. Further, in forming the uneven pattern, a brush may be used to make a trace on the surface of the sandstone-like surface when the coating material is not dried, in order to express the rougher feeling of the sandstone-like surface.

In order to impart a design feeling closer to that of natural sandstone, these sandstone-like coatings have the same composition with the sandstone-like coating formed, or sandstone-like coatings having different aggregate particle sizes and hues. One or two or more of the composition for use may be brush-coated or spray-coated on the surface of the previously formed sandstone-like coating film.

[0022]

The composition for forming a sandstone-like coating film of the present invention is in an optimum state when a coating film is formed by the combination of the respective constituents thereof, and as a result, excellent dryness and cracks on the coating film surface are obtained. It is possible to obtain the contradictory effect that it is difficult to generate, and the effect of preventing sedimentation during long-term storage, but such an effect is obtained especially with an average fiber length, a synthetic fiber that defines the fineness, an average particle size, and a particle size. This is a result of the combined effects of the prescribed colored aggregate and the inorganic powder, the fluidity adjusting effect of polyethylene oxide, and the like.

[0023]

EXAMPLES In order to clarify the effects of the present invention, various tests were compared as Examples and Comparative Examples.

(Test method) * Production of composition for forming sandstone-like coating film A synthetic resin emulsion was put into a stirring tank, and then the raw materials shown in Table 1 were shown in Table 2 while stirring with a dissolver. It was added so that the compounding ratio was obtained. While continuing the stirring, the stirring was terminated in a state where the respective raw materials were almost uniformly mixed without being biased, the mixture was allowed to stand for a while, and then the following tests were conducted.

* According to the sagging test "JIS A 6021 Roof coating waterproof material 5.10 Sagging resistance performance", a flexible board cut into a length of 400 mm, a width of 200 mm and a thickness of 5 mm was manufactured by SK Kaken Co., Ltd. "Miracushiler ES", coating amount 0.35
It was coated with an airless spray gun at kg / m 2 and dried and cured for 6 hours. Around the smooth surface, leaving a margin of 40 mm for the coating film in the longitudinal direction of the flexible board, a width of 10
mm, and a thickness of 6 mm were attached, and the sandstone-like coating film-forming composition produced as described above was smoothly applied with a trowel to the concave portion formed after the mold was placed horizontally. Immediately after coating, the one-sided formwork provided with a 200 mm sag margin of this test body was removed, and then the entire test body was held vertically.
Let stand at ℃ for 24 hours. After that, the state of dripping of the sandstone-like coating film of the part where the formwork was removed was visually confirmed, and those with no dripping were evaluated as ○, those with a slight dripping were evaluated as △, and those with a large dripping were evaluated as ×. .

* Iron workability test "Miracushiler ES" manufactured by SK Kaken Co., Ltd. was applied to the wall surface of an area of 1 m2 with an airless spray gun at a coating amount of 0.35 kg / m2 and dried and cured for 6 hours. The sandstone-like coating film-forming composition produced as described above was applied smoothly with a trowel to a thickness of 6 mm. At this time, it was confirmed whether or not the composition spreads smoothly with a trowel, and those having a smooth spread were evaluated as ◯, and those having a large friction and poor spread were evaluated as x. Then, the same material was partially distributed on a smooth surface to form an uneven pattern. Regarding the ease of applying the uneven pattern at this time, ○ is easy to form the uneven pattern and maintains the formed uneven pattern as it is, ○ is difficult to make the uneven pattern and is easily broken even if the uneven pattern is applied. did. Furthermore, when forming an uneven pattern, ○
The one with poor iron quality was evaluated as x.

Surface crack test A flexible board cut into a length of 400 mm, a width of 200 mm and a thickness of 5 mm was pasted with a mold having a width of 10 mm and a thickness of 2 mm on two sides of the smooth surface of 400 mm. Further, the mold half length is 200 mm, width 10 mm,
A mold having a thickness of 6 mm was laminated on the surface of the previously bonded mold, and the mold was bonded so that the mold had a step shape of 2 mm and 6 mm as shown in FIG. A sandstone-like coating film-forming composition produced as described above was applied to such a mold with a trowel so as to form a step, and then dried at 20 ° C. for 24 hours, and the surface and the step It was visually confirmed whether or not cracks were generated in the corner portions of the shape. At this time, those with no cracks were marked with ○, and those with cracks were marked with ×.
Evaluated as.

* Drying property test A test piece was prepared in the same manner as in the sagging test except that a mold having a width of 10 mm and a thickness of 4 mm was used. Immediately after being coated evenly with a trowel, the weight of the test piece was measured and cured at a temperature of 20 ° C. and a humidity of 65%. 5 hours later,
The weights after 10 hours and 20 hours were measured, and the weight loss was calculated. Next, the test piece is heated to 100 ° C.
The weight was measured by heating to absolute dryness with and the difference between the weight at this time and the initial weight was taken as the weight of volatile matter. This volatile matter weight was set to 100, and what percentage the weight loss after 5 hours, 10 hours, and 20 hours was calculated was calculated.

* Water resistance test Except for using a mold having a width of 10 mm and a thickness of 4 mm, the test piece was smooth-painted with a trowel and then dried and cured for 7 days in the same manner as the preparation of the test piece in the sag test. Was immersed in warm water at 50 ° C. for 24 hours and then pulled up to visually confirm the surface condition. At this time, a sandstone-like coating film having no abnormality was evaluated as ◯, a slight whitening was evaluated as Δ, and an outflow was evaluated as x.

* Appearance test The wall surface after the iron workability test was visually confirmed, and those that were very close to the surface appearance of natural sandstone were marked with ◯ and defective appearance was marked with x.
Evaluated as.

The results of these tests will be described below.

Example 1 Using the raw materials of Table 1, Table 2
As in the formulation example described in 1., a composition for forming a sandstone-like coating film was produced, and various tests were carried out based on the above-mentioned test method. As a result, as shown in Table 4, the sag, the iron cutting property, Very good results were obtained in surface cracking. Further, the spread of the iron, the imparting the uneven pattern, and the water resistance were generally good. Regarding the drying property, after the initial 5 hours,
It was found that the rate of weight reduction was larger than that of each of the comparative examples described later and the drying property was excellent. As described above, although it was excellent in drying property, no surface crack was generated, and the appearance of the coating film was very similar to the surface of natural sandstone.

Example 2 Using the raw materials in Table 1, Table 2
As shown in Table 4, the composition of the sandstone-like coating film-forming composition was produced, and various tests were conducted based on the above-mentioned test method. The result was excellent. Also, sagging test, uneven pattern imparting property,
The iron cutting performance, surface cracks, and water resistance were also generally good. Regarding the dryness, it was found that the weight reduction rate was larger than that of each Comparative Example described later at the time when the initial 5 hours passed, and the dryness was excellent. As described above, although it was excellent in drying property, almost no surface crack was generated, and the appearance of the coating film was very similar to the surface of natural sandstone.

Example 3 Using the raw materials of Table 1, Table 2
As shown in Table 4, the composition for forming sandstone-like coating film was produced and various tests were carried out based on the above-mentioned test method, as shown in Table 4, and the sharpness of the iron was very high. The result was excellent. In addition, the sagging test, the spreadability of the iron, the ability to impart an uneven pattern, the surface crack, and the water resistance were generally good. As for the drying property, the rate of weight loss was higher than that of each of the Comparative Examples described later at the time when the initial 5 hours passed,
It was found that the drying property was excellent. As described above, although it was excellent in drying property, almost no surface crack was generated, and the appearance of the coating film was very similar to the surface of natural sandstone.

(Example 4) Using the raw materials of Table 1, Table 2
As shown in Table 4, as shown in Table 4, as a result of producing a sandstone-like coating film-forming composition and performing various tests based on the above-mentioned test method, as shown in Table 4, as shown in Table 4, The result is that the surface crack and the water resistance are very excellent. In addition, the spreadability of the iron and the ability to provide the uneven pattern were generally good. Regarding the dryness, it was found that the weight reduction rate was larger than that of each Comparative Example described later at the time when the initial 5 hours passed, and the dryness was excellent. As described above, the dryness is excellent, the surface cracks are scarcely generated, and the water resistance is also excellent. Therefore, when the curing period after construction is short, there is little problem even if there is rainfall. Also,
The appearance of the coating formed was very similar to that of natural sandstone.

(Comparative Example 1) Using the raw materials of Table 1, Table 3
As shown in Table 5, the composition of the sandstone-like coating film-forming composition was produced and various tests were conducted based on the above-mentioned test method. Since it was shorter than the specified range, it was found that the sag, surface cracks, and water resistance were inferior to those of the examples, and the drying properties were smaller than those of the examples at the time of the initial 5 hours, and it took longer to dry. Also, the appearance of the formed coating film is
It is different from the surface design of natural sandstone.

(Comparative Example 2) Using the raw materials of Table 1, Table 3
As shown in Table 5, the composition of the sandstone-like coating film-forming composition was produced and various tests were conducted based on the above-mentioned test method. Since the length was longer than the specified range, it was inferior to the examples in the spread of iron and the property of providing the uneven pattern. The appearance of the formed coating film was different from the surface design of natural sandstone.

(Comparative Example 3) Using the raw materials of Table 1, Table 3
As shown in Table 5, the composition ratio of vinylon was determined according to the present invention, as shown in Table 5, as a result of producing a composition for forming a sandstone-like coating film and conducting various tests based on the above-mentioned test method. It was found that, since the amount was more than the specified range, the spread of the iron and the uneven pattern imparting property were inferior to those of the examples, and the drying property was smaller than that of the examples at the time of the initial 5 hours, and it took longer to dry. Furthermore, the water resistance was also very poor due to outflow. The appearance of the formed coating film was different from the surface design of natural sandstone.

(Comparative Example 4) Using the raw materials of Table 1, Table 3
As shown in Table 5, the composition ratio of vinylon was determined according to the present invention, as shown in Table 5, as a result of producing a composition for forming a sandstone-like coating film and conducting various tests based on the above-mentioned test method. Since the amount was less than the specified range, it was inferior to the examples in the iron cutting and surface cracking. The appearance of the formed coating film was different from the surface design of natural sandstone.

(Comparative Example 5) Using the raw materials of Table 1, Table 3
As shown in Table 5, the composition of the sandstone-like coating film was produced and various tests were carried out based on the above-mentioned test method. It was found that since the iron content was smaller than the range specified in the invention, it was inferior to the examples in the trowel breakage and surface cracks, and the drying property was smaller than that of the examples at the time of the initial 5 hours, and it took longer to dry. Furthermore, some whitening was observed in water resistance. The appearance of the formed coating film was different from the surface design of natural sandstone.

(Comparative Example 6) Using the raw materials of Table 1, Table 3
As shown in Table 6, as a result of producing a composition for forming a sandstone-like coating film and conducting various tests based on the above-mentioned test method, as shown in Table 6, the particle size of the inorganic powder is Since it was larger than the range specified in the invention, the sagging property, the spread of the iron, and the concavo-convex pattern imparting property were inferior to those of the examples. Also, the appearance of the coating film was different from the surface design of natural sandstone.

(Comparative Example 7) Using the raw materials of Table 1, Table 3
As shown in Table 6, the composition ratio of the inorganic powder was as shown in Table 6 as a result of producing a composition for forming a sandstone-like coating film and conducting various tests based on the above-mentioned test method. Since the amount was more than the range specified in the present invention, it was inferior to the examples in the spread of iron and the property of providing the uneven pattern. Also, the appearance of the coating film was different from the surface design of natural sandstone.

(Comparative Example 8) Using the raw materials of Table 1, Table 3
As shown in Table 6, the composition ratio of the inorganic powder was as shown in Table 6 as a result of producing a composition for forming a sandstone-like coating film and conducting various tests based on the above-mentioned test method. Since the amount is less than the range specified in the present invention, it is inferior to the examples in the sagging property, the cutting of the iron, and the surface cracks, and the drying property may be smaller than that of the examples at the time of the initial 5 hours, and it may take a longer time to dry. all right. Furthermore, some whitening was observed in water resistance. Also, the appearance of the coating film was different from the surface design of natural sandstone.

(Comparative Example 9) Using the raw materials of Table 1, Table 3
As shown in Table 6, the composition for forming a sandstone-like coating film was produced and various tests were carried out based on the above-mentioned test method, as shown in Table 6, and no polyethylene oxide was added. Therefore, it was inferior to the examples in the spread of the iron, the imparting the uneven pattern, and the surface cracking property. Also, the appearance of the coating film was different from the surface design of natural sandstone.

(Comparative Example 10) Using the raw materials of Table 1, a composition for forming a sandstone-like coating film was produced as in the formulation example of Table 3, and various tests were conducted based on the above test method. As a result of performing, as shown in Table 6, since pulp of natural fiber was blended in place of synthetic fiber, it was inferior to the examples in the spread of iron and the imparting unevenness pattern, and the initial dryness was 30%. At the time point of minutes, it was found that the weight loss was smaller than that of the example and it took longer to dry. Furthermore, some whitening was observed in water resistance. Also, the appearance of the coating film was different from the surface design of natural sandstone.

[0046]

[Table 1]

[Table 2]

[Table 3]

[Table 4]

[Table 5]

[Table 6]

[0047]

The effect of the present invention is that while the conventional composition for forming a sandstone-like coating film often causes cracks on the surface of the formed sandstone-like coating film, it does not cause much cracking. It's difficult. On the other hand, since it is excellent in drying property and water resistance, it is resistant to rainfall after construction, and the uneven pattern formed by wind and rain is less likely to collapse than the conventional one in which the undried state is relatively long. Further, in such a pattern forming material by hand plastering, trowel workability is very important, but in the composition of the present invention, spread of the trowel, easiness of imparting an uneven pattern, trowel breakage Very good in any of the goodness, and because the formed uneven pattern is maintained and adjusted to a viscosity that does not collapse,
It can be said that it is a coating material that is very easy to handle when forming a natural sandstone-like surface design.

[Brief description of drawings]

FIG. 1 is a perspective view showing a flexible board to which a mold is attached for producing a test body for a surface crack test.

[Explanation of symbols]

a flexible board b 2mm formwork c 6mm formwork

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) C09D 157/00 C09D 5/28 C09D 171/02 C09D 163/00

Claims (3)

(57) [Claims] 1. A synthetic resin emulsion having a solid content of 100.
5 to 15 parts by weight of synthetic fibers having an average fiber length of 0.5 to 5 mm and a fineness of 0.5 to 10 denier, and a particle size of 50 to 500 μm based on parts by weight.
100-600 parts by weight of colored aggregate within m, 100-600 parts by weight of inorganic powder with particle size within 50-1000 μm
600 parts by weight, containing polyethylene oxide in a solid content of 1 to 10 parts by weight, and the weight ratio of the colored aggregate to the inorganic powder is 6: 1 to
A composition for forming a sandstone-like coating film having excellent ironing workability, which is 1: 6. 2. A sand rock-like coating film excellent in trowel workability according to claim 1, further comprising a polyamide polyamine epichlorohydrin resin in a solid content of 0.5 to 5 parts by weight. Composition. 3. The composition for forming a sandstone-like coating film according to claim 1 or 2 having a solid content ratio of 60 to 90.
A method for forming a sandstone-like coating film, which comprises diluting with water to a weight percentage and ironing the surface to be coated.