JPH101624A - Forming composition to form sand stone-like coating and its formation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition useful for troweling, etc., hardly cracked, excellent in drying and water resistance, comprising a synthetic resin, a colored aggregate and inorganic powder as a blending composition. SOLUTION: This composition comprises (A) 100 pts.wt. based on a solid content of a synthetic resin emulsion, (B) 5-15 pts.wt. of synthetic fibers having 0.5-5mm average fiber length and 0.5-10 denier, (C) 100-600 pts.wt. of a colored aggregate having 50-500μm particle size, (D) 100-600 pts.wt. of inorganic powder having 500 to 1,000μm particle size and (E) 1-10 pts.wt. calculated as a solid content of polyethylene oxide in the weight ratio of the components C and D of (6:1) to (1:6). Preferably, the composition further comprises (F) 0.5-5 pts.wt. calculated as a solid content of a polyamide polyamine epichlorohydrin resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition for forming a natural sandstone-like coating film on a surface of an object to be coated and a method for forming the same.

[0002]

2. Description of the Related Art Conventionally, various coating materials capable of expressing a design feeling similar to natural stones without using heavy materials such as natural stones and materials which are inconvenient to process have been used for buildings, civil engineering structures and the like. Installed on the surface. As such natural stone-like coating materials, there are natural sandstone-like materials as well as granite-like and marble-like materials. This natural sandstone tone is characterized by an irregular surface irregular shape, such as a split skin of sedimentary rock, and a rough touch of the surface made of sand and gravel. The natural sandstone-like coating material is a composition that forms such a natural sandstone-like coating film. One of the methods for forming the irregular surface shape is ironing by a plasterer. In such an ironing, a natural sandstone-like coating material is applied to an object to be coated smoothly in advance, and immediately thereafter, a pattern is formed while partially distributing the coating material with the iron. On the other hand, a natural sandstone-like coating film can also be formed by a method in which a natural sandstone-like coating material is poured into an artificial mold obtained by molding the surface shape of natural sandstone, dried, and then demolded.

[0003]

For such a natural sandstone-like coating material, in the case of on-site construction, ironing is often used among the above-mentioned methods. In such ironing work, a natural sandstone-like coating material is thickened to about several millimeters, and an irregular surface unevenness is given by the iron, so that it is necessary to easily form a pattern with the iron. The ease with which a pattern can be formed with an iron means that the coating material is light and smooth with the iron, that there is no adhesion to the iron, that the pattern is made and that the iron is well separated when separated from the coating material, The cutting is good, and the formed concavo-convex pattern does not collapse due to the dripping of the coating material, and is relatively quickly dried and hardened. However, in the case of a coating material that dries quickly, the surface of the formed natural sandstone-like coating film sometimes cracks due to rapid drying. Also, when a natural sandstone-like coating film is formed by pouring into an artificial mold, if a material excellent in drying property is used to improve production efficiency, after pouring the coating material into the artificial mold, As the drying of the surface progressed, skinning occurred, and the inside of the coating material was delayed in some cases. As a result, there were cases in which a pattern portion on the coating film surface was damaged after demolding.

[0004] Therefore, the problem to be solved by the present invention is that a natural sandstone-like coating film can be formed by any method of ironing and casting into an artificial mold. It is a coating material with excellent workability that the pattern formed by the iron is very easy to be formed and the formed pattern does not collapse due to sagging, and it has excellent drying properties and can cause cracks and skinning on the surface. Is to get no composition.

[0005]

Means for Solving the Problems In order to solve such problems, the present inventors have proposed a composition for forming a natural sandstone-like coating film, which comprises a synthetic resin emulsion, a colored aggregate and an inorganic powder. As a compounding composition, among these, the colored aggregate, the particle size of the inorganic powder is specified, and further, as a synthetic fiber,
I came up with the use of certain ones.

That is, based on 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 100 to 60 colored aggregates
0 parts by weight, 100 to 100 parts by weight of inorganic powder having a particle size of 50 to 1000 μm
600 parts by weight, containing 1 to 10 parts by weight of polyethylene oxide in solid content, the weight ratio of the colored aggregate to the inorganic powder is 6: 1 to 1
1: 6.

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

In actual use of the present invention,
Water is added to each of the above-mentioned components as needed, and in this case, the ratio of the solid content in the whole composition in which the water is mixed is in the range of 60 to 90%. It is adjusted to a high liquidity.

[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 pre-synthesized resin is dispersed in an aqueous dispersion medium in a dispersant. And any of those dispersed using a powder, or a powder type emulsion may be used. However, in the case of a powder type, addition of water is essential at the time of use.

[0010] The types of these emulsions include polyvinyl acetate, polyacrylate, acryl-styrene copolymer, ethylene-vinyl acetate copolymer, vinyl acetate-acryl copolymer, and ethylene-vinyl chloride copolymer. And at least one of a vinyl acetate-veova copolymer and the like.

Average fiber length: 0.5 to 5 mm, fineness: 0.5
The synthetic fiber of 10 to 10 denier is not particularly limited as long as the average fiber length and the fineness are within these ranges. Here, the fineness is an index indicating the thickness of the fiber, and is expressed by denier representing the number of grams of mass per 9000 m in length.

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

The colored aggregate having a particle size of 50 to 500 μm is not particularly limited as long as it has a particle size in this range and is colored, and the surface of the granular material such as silica sand, crushed stone, glass bead, etc. A method of baking sodium silicate-based binder with high pigmentability at high temperature, baking coating with amino alkyd resin paint, etc.
The one in which the baking step is omitted by a colored lacquer, or in the case of considering weather resistance, comprises an alkoxysilyl group as a functional group, a siloxane cross-linking type reactive oligomer having an acrylic main chain, a pigment, and a curing agent. It can be appropriately used, for example, one coated with a coloring material by coloring, a crushed product of ceramics fired with a pigment, or a crushed product of colored natural stone.

The inorganic powder having a particle size of 50 to 1000 μm includes heavy calcium carbonate, kaolin, talc, clay,
Examples thereof include dolomite, diatomaceous earth, quartz powder, quartz sand, barite powder, wollastonite, and the like, and are not particularly limited as long as the average particle size falls within this range.

[0015] Polyethylene oxide is a high molecular polymer obtained by linking about 10,000 to several hundred thousand ethylene oxide molecules, and has about 300 or more ethylene oxide repeats.

The polyamide polyamine epichlorohydrin resin is obtained, for example, by reacting an aliphatic dicarboxylic acid with a low molecular weight polyamide polyamine obtained by condensing a polyalkylene polyamine with epichlorohydrin in an aqueous solution. Polymer or copolymer dispersions of aminoacrylamides such as propylacrylamide, dimethylaminoethylacrylamide, dimethylaminoethylmethacrylamide and adducts of epichlorohydrin such as aminomethacrylamide, or ethylenically unsaturated bonds having more water-soluble functional groups A water-soluble resin obtained by copolymerization with a contained monomer is exemplified.

The composition of the present invention is prepared by mixing the above and / or the like. From above, 6: 1 to 1: 6 is desirable as described above. This is because, in the case of this range, the ironing workability is improved and the sedimentation of the aggregate is reduced in the range of the relationship between the aggregate particle size and the mixing ratio and the specific gravity and the mixing ratio of the resin.

In the composition of the present invention, the ratio of each of the components (a) to (c) must be in the above-mentioned range with respect to 100 parts by weight of the synthetic resin emulsion. If each component is out of this range, the drying property is reduced, the surface cracks are easily generated, and the spread of the iron is poor, and the like, the effect of the present invention is sufficiently obtained. You will not be able to do it. For example, when the amount of the synthetic fibers exceeds the range specified in the present invention, the paint becomes sticky at the time of ironing, so that the iron becomes difficult to move smoothly, so that it becomes difficult to form a sandstone-like uneven pattern. Conversely, if the amount of synthetic fibers is less than the range specified in the present invention, sagging of the uneven pattern and cracks on the surface will occur. Poor spreadability during ironing also occurs when the amount of polyethylene oxide is small.
Furthermore, when the amount of aggregate is small, surface cracks are liable to occur, and when the amount of aggregate is large, the composition becomes sparse and the spread during ironing is also poor.

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

In the actual application of the composition of the present invention, the composition which has been mixed in advance is mixed again on site with a hand mixer and then ironed. At the time of ironing, a natural sandstone-like uneven pattern is formed by the plasterer's hand. In this case, a plurality of different-colored compositions are prepared, and then the different-colored compositions are appropriately distributed and coated with a trowel, and then a multicolored feeling can be obtained by a method of leveling the boundary. In the formation of the concavo-convex pattern, a trace may be formed on the surface of the coating material with a brush when the coating material is not dried, in order to express a rough texture of the sandstone-like surface. In the case of casting, a sandstone-like coating sheet manufactured by applying a silicone-based release agent to an artificial mold having a sandstone-like surface, pouring the mixed composition, drying and removing the mold is used. It is adhered to the surface of the object with an adhesive or the like.

These sandstone-like coatings are made of the same composition having a sandstone-like coating or a sandstone-like coating having different aggregate particle size and hue in order to impart a design feeling close to that of natural sandstone. One or two or more of the compositions for use in excess may be brushed 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 a combination of its constituent components. As a result, excellent drying properties and cracks on the coating film surface are obtained. Contradictory effect of the difficulty of the occurrence of, and the effect of preventing sedimentation during long-term storage is obtained, such effects are particularly effective for synthetic fibers with a defined average fiber length, fineness, average particle size, and particle size. This is the result of combining the prescribed filling effect of the colored aggregate with the inorganic powder, the flow control 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 a composition for forming a sandstone-like coating film The raw materials shown in Table 1 are shown in Table 2 while the synthetic resin emulsion is put into a stirring tank and subsequently stirred with a dissolver. It was introduced so as to have a mixing ratio. While the stirring was continued, the stirring was terminated in a state where the respective raw materials were almost uniformly mixed, and the mixture was allowed to stand for a while, and then the following test was performed.

* Sagging test A flexible board cut into a length of 400 mm, a width of 200 mm, and a thickness of 5 mm was manufactured according to "JIS A 6021 Roof coating waterproofing material 5.10 Sagging resistance performance" and manufactured by SK Chemical Co., Ltd. Mila Sealer ES ”with a coating amount of 0.35
It was painted with an airless spray gun at kg / m2 and dried and cured for 6 hours. Around the smooth surface, leaving a sagging allowance of the coating film of 40 mm in the longitudinal direction of the flexible board, a width of 10 mm
The composition for forming a sandstone-like coating film produced as described above was smoothly applied to a concave portion formed after attaching a mold having a thickness of 6 mm and a thickness of 6 mm and placing the mold horizontally. Immediately after the application, the mold on one side provided with a 200 mm sag was removed from the specimen, and then the entire specimen was held vertically.
Leave at 24 ° C. for 24 hours. Thereafter, the state of dripping of the sandstone-like coating film in the part where the mold was removed was visually checked, and those with no dripping were evaluated as ○, those with slight dripping as Δ, and those with large dripping as X. .

* Iron workability test "Miracsealer ES" manufactured by SK Chemicals Co., Ltd. was applied on a wall surface having 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 composition for forming a sandstone-like coating film produced as described above was smoothly applied with a trowel to a thickness of 6 mm. At this time, it was confirmed whether or not the composition spread smoothly with a trowel. If the composition was smooth, the evaluation was ○, and if the friction was large and the growth was poor, the evaluation was ×. Thereafter, the same material was partially distributed on the smooth surface to form an uneven pattern. Regarding the ease of applying the uneven pattern at this time, a mark indicating that the uneven pattern is easy to form and the formed uneven pattern is maintained as it is, a mark indicating that the uneven pattern is difficult to attach, and a mark that easily collapses even with the uneven pattern is indicated as X. did. In addition, when forming an uneven pattern, ○ with good iron cutting
Poorly cut iron pieces were 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 attached with a 10 mm wide and 2 mm thick formwork on two sides of 400 mm of the smooth surface. Furthermore, at half the length of the mold, 200 mm, width 10 mm,
A mold having a thickness of 6 mm was laminated and attached on the surface of the mold previously attached, so that the mold had a step shape of 2 mm and 6 mm as shown in FIG. In such a mold, the composition for forming a sandstone-like coating film produced as described above is applied in a trowel so as to be stepwise, and then dried at 20 ° C. for 24 hours. It was visually confirmed whether or not cracks occurred in the corners of the shape. At this time, を indicates that no cracks occurred, and × indicates that cracks occurred.
Was evaluated.

* Dryability test A test specimen was prepared in the same manner as in the sag test, except that a mold having a width of 10 mm and a thickness of 4 mm was used. Immediately after coating with a trowel, the specimen was weighed immediately after curing, and cured at a temperature of 20 ° C. and a humidity of 65%. 5 hours later,
After 10 hours and 20 hours, the weight was measured, and the weight loss was calculated. Next, the specimen was heated to 100 ° C.
, And the weight was measured, and the difference between the weight at this time and the initial weight was taken as the volatile matter weight. With this volatile content weight being 100, the percentage of weight loss after 5 hours, 10 hours and 20 hours was calculated.

* Water resistance test Except that a mold having a width of 10 mm and a thickness of 4 mm was used, in the same manner as in the preparation of the test piece for the sagging test, it was coated with a trowel, and then dried and cured for 7 days. Was immersed in warm water of 50 ° C. for 24 hours, then pulled up, and the state of its surface was visually checked. At this time, the sandstone-like coating film was evaluated as ○ when there was no abnormality, as Δ when slight whitening was observed, and as × when outflow was observed.

* Appearance test After the iron workability test was performed, the wall surface was visually checked, and those very close to the surface appearance of the natural sandstone were evaluated as ○, and poor appearance was evaluated as ×.
Was evaluated.

The results of these tests will be described below.

Example 1 Using the raw materials shown in Table 1, Table 2
As shown in Table 4, a composition for forming a sandstone-like coating film was manufactured, and various tests were performed based on the above-described test methods. As a result, as shown in Table 4, sagging property, ironing property, Very good results were obtained in surface cracks. In addition, the spreadability of the iron, the ability to impart a concavo-convex pattern, and the water resistance were generally good. As for the drying property, the initial 5 hours have passed.
It was found that the rate of weight loss was greater than in each of the comparative examples described below, and the drying property was excellent. Although excellent in drying property, no surface cracks were generated, and the coating film appearance was very similar to the surface of natural sandstone.

Example 2 Using the raw materials shown in Table 1, Table 2
As shown in Table 4, a composition for forming a sandstone-like coating film was manufactured and subjected to various tests based on the above-described test methods. Excellent results were obtained. In addition, sag test, uneven pattern imparting property,
The ironing properties, surface cracks and water resistance were also generally good. Further, with respect to the drying property, it was found that the weight loss rate was larger than that of each of the comparative examples described later at the elapse of 5 hours in the initial stage, and the drying property was excellent. Although having excellent drying properties, the surface cracks hardly occurred, and the appearance of the coating film was very similar to the surface of natural sandstone.

Example 3 Using the raw materials shown in Table 1, Table 2
As shown in Table 4, a composition for forming a sandstone-like coating film was prepared and subjected to various tests based on the above-described test methods. Excellent results were obtained. In addition, the sagging test, the spreadability of the iron, the ability to impart an uneven pattern, the surface cracks, and the water resistance were generally good. Further, with respect to the drying property, at the time point when the initial 5 hours have elapsed, the weight loss rate is larger than each of the comparative examples described below,
It turned out that it is excellent in drying property. Although having excellent drying properties, the surface cracks hardly occurred, and the appearance of the coating film was very similar to the surface of natural sandstone.

Example 4 Using the raw materials shown in Table 1, Table 2
As shown in Table 4, a composition for forming a sandstone-like coating film was manufactured and subjected to various tests based on the above-described test methods. As a result, as shown in Table 4, sagging property and sharpness of the iron , Surface cracks and water resistance were extremely excellent. In addition, the spreadability of the iron and the property of imparting an uneven pattern were generally good. Further, with respect to the drying property, it was found that the weight loss rate was larger than that of each of the comparative examples described later at the elapse of 5 hours in the initial stage, and the drying property was excellent. As described above, it is excellent in dryness, hardly generates surface cracks, and is excellent in water resistance. Therefore, when the curing period after construction is short, there is little problem even if there is rainfall. Also,
The appearance of the formed coating film was very similar to the surface of natural sandstone.

Comparative Example 1 Using the raw materials shown in Table 1, Table 3
As shown in Table 5, a composition for forming a sandstone-like coating film was manufactured and various tests were performed based on the above-described test methods. Since it was shorter than the specified range, it was found that the sagging property, surface crack, and water resistance were inferior to those of the examples, and that the drying property was smaller than that of the examples in the initial 5 hours after the elapse of 5 hours, and that the drying time was longer. Also, the appearance of the formed coating film is
It was different from the surface design of natural sandstone.

(Comparative Example 2) Using the raw materials shown in Table 1,
As shown in Table 5, a composition for forming a sandstone-like coating film was manufactured and various tests were performed based on the above-described test methods. Since the length was longer than the specified range, it was inferior to the examples in iron spreadability and unevenness imparting property. Further, the appearance of the formed coating film was different from the surface design of natural sandstone.

(Comparative Example 3) Using the raw materials shown in Table 1,
As shown in Table 5, a composition for forming a sandstone-like coating film was prepared and subjected to various tests based on the above-described test methods. Since it was more than the specified range, it was inferior to the examples in the iron spreadability and the concavo-convex pattern imparting property, and it was also found that the drying property was smaller than the examples in the initial 5 hours after the elapse of the drying time and that the drying time was longer. In addition, outflow occurred in water resistance, resulting in a very poor water resistance. Further, the appearance of the formed coating film was different from the surface design of natural sandstone.

Comparative Example 4 Using the raw materials shown in Table 1, Table 3
As shown in Table 5, a composition for forming a sandstone-like coating film was prepared and subjected to various tests based on the above-described test methods. Since it was less than the specified range, it was inferior to the examples in ironing and surface cracks. Further, the appearance of the formed coating film was different from the surface design of natural sandstone.

(Comparative Example 5) Using the raw materials shown in Table 1, Table 3
As shown in Table 5, a composition for forming a sandstone-like coating film was manufactured and subjected to various tests based on the above-described test methods. As shown in Table 5, the particle size of the inorganic powder was Since it was smaller than the range specified by the invention, it was found that the ironing and surface cracking 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. Further, slight whitening was observed in water resistance. Further, the appearance of the formed coating film was different from the surface design of natural sandstone.

(Comparative Example 6) Using the raw materials shown in Table 1,
As shown in Table 6, the composition for forming a sandstone-like coating film was manufactured and various tests were performed based on the above-described test methods. Since it was larger than the range specified in the invention, it was inferior to the examples in sagging property, iron spread, and uneven pattern imparting property. The appearance of the coating film was different from the surface design of natural sandstone.

(Comparative Example 7) Using the raw materials shown in Table 1, Table 3
As shown in Table 6, a composition for forming a sandstone-like coating film was manufactured and various tests were performed based on the above-described test methods. As a result, as shown in Table 6, the composition ratio of the inorganic powder was Since the number is larger than the range specified in the present invention, the iron spreadability and the concavo-convex pattern imparting property are inferior to the examples. The appearance of the coating film was different from the surface design of natural sandstone.

(Comparative Example 8)
As shown in Table 6, a composition for forming a sandstone-like coating film was manufactured and various tests were performed based on the above-described test methods. As a result, as shown in Table 6, the composition ratio of the inorganic powder was Since it is less than the range specified in the present invention, sagging property, cutting of iron, and surface cracks are inferior to those of the examples. all right. Further, slight whitening was observed in water resistance. The appearance of the coating film was different from the surface design of natural sandstone.

(Comparative Example 9) Using the raw materials in Table 1, Table 3
As shown in Table 6, a composition for forming a sandstone-like coating film was produced and various tests were performed based on the above-described test methods. As a result, as shown in Table 6, polyethylene oxide was not blended. For this reason, the spreadability of the iron, the ability to impart a concavo-convex pattern, and the surface cracking property were inferior to the examples. The appearance of the coating film was different from the surface design of natural sandstone.

(Comparative Example 10) A composition for forming a sandstone-like coating film was prepared using the raw materials shown in Table 1 as in the formulation examples shown in Table 3, and subjected to various tests based on the above-mentioned test methods. As a result, as shown in Table 6, natural fiber pulp was used instead of synthetic fiber. At the minute point, it was found that the weight loss was smaller than that of the example and it took longer to dry. Further, slight whitening was observed in water resistance. 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 the conventional composition for forming a sandstone-like coating film often cracks on the surface of the sandstone-like coating film to be formed, whereas the composition of the present invention is very cracking. It is 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 the wind and rain is less likely to collapse as compared with the conventional one in which the undried state is relatively long. Further, in such a pattern forming material by hand of the plasterer, iron workability is very important, but in the composition of the present invention, the spread of the iron, the ease of imparting an uneven pattern, the cutting of the iron Very good in any of the goodness, and because the viscosity is adjusted so that the formed uneven pattern is maintained and does not collapse,
It can be said that it is a very easy-to-use coating material when forming a natural sandstone-like surface design.

[Brief description of the 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 Formwork of 2mm c Formwork of 6mm

Claims (3)

[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 100 to 60 parts of colored aggregate having a particle size of 50 to 500 μm with respect to parts by weight.
0 parts by weight, 100 to 100 parts by weight of inorganic powder having a particle size of 50 to 1000 μm
600 parts by weight, containing 1 to 10 parts by weight of polyethylene oxide in solid content, the weight ratio of the colored aggregate to the inorganic powder is 6: 1 to 1
A composition for forming a sandstone-like coating film, which is 1: 6. 2. The composition for forming a sandstone-like coating film according to claim 1, further comprising 0.5 to 5 parts by weight of a polyamide polyamine epichlorohydrin resin in solid content. 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, wherein the method is diluted with water so as to have a weight% and applied to a surface to be coated.