JP3469103B2 - Laminated roller coating method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of coating a stone material coating material which can be coated with a roller brush (hereinafter simply referred to as "roller").

[0002]

2. Description of the Related Art In recent years, stone surface coating materials, which can reproduce the texture of natural stones with coating materials, are often used in the surface makeup finish of interiors and exteriors of buildings. This is because the price is lower than that of the surface makeup finish where real natural stone is stuck and used, and there is no risk of peeling. In addition, it has the advantage that it can be applied to almost any base material without selecting a base material, and that various hues and textures can be easily imparted by adjusting the contained colored aggregates and other aggregates.

[0003]

Most of the stone material coating materials having many advantages as described above are constructed by spraying. However, in the case of coating by spraying, particularly in the case of a coating material containing aggregate, scattering is large, so careful curing is required before construction, and material loss due to scattering is also large. Further, the spraying machinery and equipment also become large-scaled, and there is a problem that the burden on the operator is heavy.

Therefore, conventional roller coating of stone material has been attempted. However, the inclusion of aggregate having a relatively large particle diameter, which is indispensable for expressing a stone material design, becomes It is difficult to say that it is practical because it causes problems of coating workability such as poor coating on the roller and the base surface. In addition, the aggregate rolls on a smooth surface of the base material, and as a result, the coating material slips and there is a part where it is not applied, resulting in a mottled pattern, and the hiding property is poor and the base material is partially transparent. There were various problems, such as the need to apply multiple times because the feeling was not obtained.

Therefore, the problems to be solved by the present invention are as follows: Even when a stone material coating material is roller coated, it can be applied to the entire base material, and the sliding of the coating material due to rolling of the aggregate and the resulting The purpose of the present invention is to provide a method for applying a stone material with excellent coating workability and finish that does not cause unpainted parts. A pleasing appearance is obtained.・ There is no need to recoat multiple times. Its purpose is also to solve the problem.

[0006]

[Means for Solving the Problems] In order to solve such a problem, the inventors have proposed a coating method in which a specific undercoat layer is provided between a coating base and a stone material to be coated with a roller. The invention has been completed. That is, 1. As a first step on the coated surface, synthetic resin emulsion and
And JIS K6301-1975 "vulcanized rubber physical test method". An undercoat material having a coating hardness of 90 degrees or less in the "hardness test" when a dry film thickness of 2 mm is obtained by using a spring type hardness tester C type.
The amount of application ( excluding those containing aggregate) is 0.5 to 2.
The coating is performed so as to be 5 kg / m ^2, and in the second step, a stone material coating material containing a resin, an aggregate having a particle diameter of 0.1 to 2 mm , and an extender pigment is laminated and applied by a roller. Laminating roller coating method. 2. (Weight of resin solid content of stone material): (total weight of aggregate and extender pigment) ratio is 1: 1 to 10. The method for coating a laminated roller according to. 3 . The undercoating material is colored, and the color difference ΔE between the colored undercoating material and the colored undercoating material coating film after drying is 2
1. Laminate coating of a stone material coating material, which is 0 or less, with a roller. Or 2. The method for coating a laminated roller according to. Is.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on the embodiments thereof. <Underlying base material to be coated> Mainly finished by the coating method of the present invention is the surface of building interiors and exteriors, civil engineering structures, etc., and any base material can be used as long as it is generally used as a building material. For example, various base materials such as concrete, siding board, extruded board, and metal can be used. When the base material is fragile or the surface is not smooth, it is desirable to carry out the work after adjusting the groundwork. (Substrate adjustment: Adjust the substrate using a primer, sealer, primer, surfacer, etc., the same applies below) Also, it can be used to repaint the coating surface, but in this case it also suits the situation of the old coating surface It is necessary to adjust the groundwork. In addition, in the case of repairing the interior surface, if cloth or the like is attached, remove it and then adjust the groundwork, and in case of repairing the painted surface, perform the same as the above repainting.

(Applying Undercoat Material) In the coating method of the present invention, the undercoat material is applied as the first step. This undercoat material is JIS K 6301-1975 "Vulcanized rubber physical test method" 5. In the "hardness test", the coating film surface hardness using a spring type hardness tester C type is not particularly limited as long as it is an undercoat material having a dry film thickness of 2 mm of 90 degrees or less, It is necessary that the coating base has a concealing property such that it cannot be seen through.

By pre-coating the undercoat material having such a coating surface hardness, the aggregate in the stone material to be laminated is not rolled and, as a result, the unpainted portion due to the sliding of the coating material. It is possible to prevent the occurrence of. That is, it is considered that due to the moderate softness of the coating film surface, when the stone material coating material is roller coated, the aggregate is caught. In this case, if the surface hardness is higher than 90 degrees, the aggregate is slipped and an unpainted portion is generated, which is not preferable.

As described above, the composition of the undercoat material is not particularly limited, but an aqueous system is preferable in consideration of the environment. The composition of the undercoat material in such a case is as follows.
For example, a synthetic resin emulsion is mixed with a coloring pigment, an extender pigment, and various kinds of paint additives.

The synthetic resin emulsion which can be used is obtained by emulsion polymerization of a monomer having a polymerizable unsaturated double bond, or a resin synthesized in advance is dispersed in an aqueous dispersion medium using a dispersant. Any of these may be used, and further a powder type emulsion may be used. However, in the case of the powder type, it is necessary to add water at the time of use.

The types of these synthetic resin emulsions include polyvinyl acetate type, polyacrylic acid type,
At least one or more of acrylic-styrene copolymer system, ethylene-vinyl acetate copolymer system, vinyl acetate-acrylic copolymer system, ethylene-vinyl chloride copolymer system, vinyl acetate-veova copolymer, etc. is used. In addition, internally crosslinked or reaction-curable acrylic, urethane, or epoxy synthetic resin emulsions can also be used.

Coloring pigments that can be used include titanium oxide, zinc oxide, carbon black, ferric oxide (red iron oxide), lead chromate (morbdate orange), yellow lead, yellow iron oxide, ocher, ultramarine blue, cobalt green. Inorganic pigments such as azo, naphthol, pyrazolone, anthraquinone, perylene, quinacridone, disazo, isoindolinone, benzimidazole, phthalocyanine, and quinophthalone.

Extending pigments include heavy calcium carbonate, silica powder, clay, carion, talc, precipitated barium sulfate,
It is possible to use white carbon, diatomaceous earth, etc. together.

Other paint additives include plasticizers,
Preservatives, antifungal agents, antialgal agents, antifoaming agents, leveling agents, pigment dispersants, anti-settling agents, anti-sagging agents, matting agents, ultraviolet absorbers and the like.

The undercoat material which is the first step of the present invention can be applied by various methods such as roller application and brush application. However, roller application is preferred since the second step is applied with a roller, and the roller is a wool roller, A mastic roller can be preferably used. The coating amount needs to be appropriately changed depending on the condition of the base, but it is usually preferable to coat at about 0.5 to 2.5 kg / m ² .

(Applying Stone Material Coating Material) In the present invention, the stone material coating material is applied by a roller as the second step. The stone material coating material is not particularly limited as long as it contains a binder made of a synthetic resin, an aggregate and an extender pigment and can be coated with a roller.

Examples of such aggregates include colored aggregates and crushed natural stones, which may be used alone or in an appropriate mixture. The colored aggregate is not particularly limited as long as it is colored, but on the surface of granular materials such as silica sand, crushed stone, and glass beads, a sodium silicate-based binder containing a highly heat-resistant pigment is used at high temperature. The method of baking with, the one with baking coating such as amino alkyd resin paint, the one with coating with colored lacquer and omitting the baking step, and when considering weather resistance, it contains an alkoxysilyl group as a functional group. , Siloxane cross-linking type reactive oligomer whose main chain is acrylic, pigment and color coated with a coloring material consisting of a curing agent, crushed ceramics baked with pigment, crushed ceramic tile etc. is there. As natural stones, diatomaceous earth, quartz powder and the like can be used in addition to crushed materials such as silica sand, cold water stone, granite, marble and limestone. In addition, it is also possible to use fused silica particles, glass cullet, glass beads and the like.

The particle diameter of these aggregates is 0.1 mm.
It is preferably ˜2 mm. If the particle size is smaller than 0.1 mm, the hue of the coating film will be close to a single color and the appearance of the coating film will be dry, and if the particle size is larger than 2 mm, the rolling of the aggregate will be poor and the roller coating work Sex decreases.

The extender pigment may be the same as the extender pigment that can be used for the undercoat material. The particle diameter of the extender pigment is preferably about 1 μm to 100 μm. Those within this range improve the coating workability by a synergistic effect with the aggregate. The extender pigment needs to be blended within a range that does not hinder the intended stone material design.

These aggregates and extender pigments are preferably in a weight ratio of 1: 1 to 10 with respect to the solid content of the synthetic resin as a binder in the stone material coating material. In the case of such a ratio, in combination with the surface hardness of the undercoating material coating film, the stone material coating material is apt to be caught in the undercoating material coating material, and can be spread more smoothly by a roller.

The stone material coating material is not particularly limited as described above, but an aqueous material is preferable in consideration of the environment like the undercoat material. Especially when the undercoat material is water-based,
If the stone material is water-based, the entire laminated coating film is water-based, which is more suitable for environmental protection. As the composition of the stone material coating material in such a case, for example, a synthetic resin emulsion is mixed with an aggregate, an extender pigment and various kinds of paint additives.

As the synthetic resin emulsion, those similar to the synthetic resin emulsion which can be used in the undercoat material of the present invention can be used.

The hue of the coating film of the stone material coating material preferably exhibits a hue of 20 or less in terms of the color difference ΔE from the coating film of the undercoat material. By applying the stone material coating material having such a color difference range, the appearance of the laminated coating film is finished with a deep and heavy feeling due to the synergistic effect with the colored undercoat material. On the other hand, if there is more color difference than this, depending on the amount of aggregate and particle size of the stone material, the colored undercoat material can be seen through, and the stone material coating will appear flat and light. Is finished.

Here, the color difference ΔE defined by the present invention is CI
E 1976 Specified in the L ^* a ^* b ^* color space. The CIE 1976 L ^* a ^* b ^* color space, _{^{i.e., L * = 116 (Y /}} Y 0) 1/3 -16 a * = 500 [(X / X 0) 1/3 - (Y / Y 0 )
_{^{1/3] b * = 200 [(}} Y / Y 0) 1/3 - (Z / Z 0)
^1/3 ] is a color space having an amount L ^* a ^* b ^* defined in the rectangular coordinate system. However, X / X ₀ , Y / Y ₀ , and Z / Z ₀ are 0.008.
Greater than 856 and X, Y, Z are the tristimulus values of the object, X
₀ , Y ₀ , Z ₀ are the tristimulus values of the light source that illuminates the object color,
It is standardized to Y ₀ = 100. The color difference between two object colors placed under a certain illumination is the tristimulus values X ₁ and Y, respectively.
₁ , Z ₁ ; X ₂ , Y ₂ , Z ₂ from the above formula to obtain L ₁ ^* , a ₁ ^* , b ₁ ^* ; L ₂ ^* , a ₂ ^* , b ₂ ^* , and use them to obtain the color difference. Is calculated by the following formula. ΔE = [(L ₁ ^* -L ₂ ^* ) ² + (a ₁ ^* -a ₂ ^* ) ²
+ (B ₁ ^* -b ₂ ^* ) ² ] ^1/2

In the present invention, ΔE is obtained by a color difference meter which carries out measurement based on the above-mentioned calculation formula. Examples of such a color difference meter include those manufactured by Tokyo Denshoku Co., Ltd.
Color analyzer "TOPSCANT C-1800 D-8" etc. are mentioned. The measurement was carried out at unspecified five points on one coating film surface, and the average value thereof was used as a standard. Subsequently, the other coating film surface was subjected to unspecified five spots, and the color difference ΔE between the average value and the standard value was calculated.

In addition to the stone material coating material of the present invention, various paint additives generally used in paints can be mixed. These can be the same as those used in the undercoating material of the present invention. Further, a coloring pigment may be added as long as the finish feeling is not impaired.

Although the stone material coating material of the present invention is coated with a roller, a mastic roller can be preferably used as the roller. The natural stone coating material of the present invention is preferably coated at a coating amount of 1.0 to 3.0 kg / m ² .

As described above, in the present invention, the base material is subjected to the undercoat adjustment if necessary, and then the first step (coating with the undercoat material) and the second step (stone material coating material) are applied. In such a laminated coating film structure, by adjusting the surface hardness of the undercoating material in the first step, when the stone-based coating material in the second step is roller coated, the surface of the undercoating material coating is The aggregate and the extender pigment are caught, and the coating material can be spread smoothly.

It is also possible to further provide a protective coat layer on the coating film obtained by the construction method of the present invention. In particular, it is preferable to provide a protective coat layer in the case of construction on the exterior surface which requires durability. The protective coat layer is not particularly limited as long as it is a clear coat layer, and depending on the purpose, a clear coat layer having high weather resistance or excellent stain resistance may be applied.

[0031]

EXAMPLES Examples of the present invention will be shown below. Using the raw materials shown in Table 1, an undercoating material A was produced with the composition shown in Table 2. Also, as the undercoat material B, "Lena Excellent A roller" manufactured by SK Kaken Co., Ltd.
As the above, "KAKEN Cement Filler" manufactured by SK Kaken Co., Ltd. was used. Then, using the raw materials shown in Table 3, the stone material coating materials of the respective formulations shown in Table 4 were manufactured.

[0032]

[Table 1]

[0033]

[Table 2]

[0034]

[Table 3]

[0035]

[Table 4]

The thus prepared undercoating material and stone material coating material were laminated and coated with a roller in a combination as shown in Table 5. At this time, each test of roller coating workability, concealing property of stone-like coating film, and repeated heating and cooling of laminated coating film was performed.

[0037]

[Table 5]

(Test method) * Roller coatability test Each base material (length 30 cm x width 30 cm) shown in Table 5 was coated with a sealer or the like based on Table 5 for the one to be adjusted for the base. Subsequently, each base material was dried and cured for 3 hours, and then an undercoat material was applied based on Table 5. After that, each base material was dried and cured for 12 hours, and the stone material coating material shown in Table 4 was applied by a mastic roller. At this time, coating was performed while confirming the paste of the stone material coating material on the roller and the state of coating on the surface to be coated. At this time, ◎ one that can be uniformly coated without causing unpainted parts of the coating material and mottled, the film surface tends to be slightly rough or the film thickness tends to be thin, but one that does not mottle , The ones that produce unpainted parts were evaluated as x. After the evaluation, the test body was further dried and cured at 20 ° C. and 65% relative humidity for 14 days. The results are shown in Table 6.

* Hiding Test The test pieces used in the above roller workability test were visually observed to evaluate whether the hue of the undercoat material can be seen through. At this time, since the color difference between the undercoating material coating and the stone material coating material was small, those that were not clear whether they were transparent were evaluated as ◯, and those where the hue of the undercoating material coating was clearly visible were evaluated as x. The results are shown in Table 6.

* Finishing test After the above-mentioned hiding test, the surface condition of the laminated coating film
The appearance was visually evaluated. The results are shown in Table 6.

[0041]

[Table 6]

(Examples 1 to 2) As shown in the results of Table 6, good results were obtained in all of the workability of the roller, the concealing property, the finishing property and the repetition of heating and cooling.

(Example 3) Among the aggregates of the stone material, 3 mm, which exceeds 0.1 to 2 mm, which is the most desirable range of the present invention, was used, so that the surface of the coating film becomes rough and uneven. Although it was severe and the finishability was slightly inferior, the results such as roller workability were good, and no mottled pattern due to the occurrence of unpainted parts was not generated.

(Example 4) Since the weight ratio of the filler to the resin in the stone material coating material is higher than the most desirable range of the present invention, the fluidity is low, the slipperiness of the roller is slightly deteriorated, and the yuzu I couldn't get a skin pattern. However, the roller workability and other results were good, and no mottled pattern was generated due to the occurrence of unpainted parts.

(Comparative Example 1) Since the surface hardness of the undercoat material coating film was high, slippage occurred when the stone material coating material was applied, and an unpainted portion of the coating material was generated to form a mottled pattern.

[0046]

According to the construction method of the present invention, the natural stone-like coating material, which was mainly sprayed, can be coated with a roller, there is almost no scattering of the coating material, and there is an advantage that the labor such as curing can be saved to some extent. is there. In addition, since it has such a merit, it can be installed on any part, and is particularly suitable for interior work. further,
By setting the color difference ΔE between the undercoating material coating film and the stone material coating material coating film within a specific range, the stone material coating material coating film and the undercoating material coating film, which are originally inferior in hiding power, are integrated to form a base material. It also has the feature that it does not have a see-through feeling because it conceals the appearance of a coating film and has a solid appearance.

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Claims (3)

(57) [Claims] 1. A synthetic resin emulsifier as a first step on a coated surface.
Solution and extender pigment, JIS K6301-1
975 "Vulcanized rubber physical test method" 5. Undercoating materials (excluding those containing aggregates) whose coating film surface hardness using a spring type hardness tester C type in the "hardness test" is 90 degrees or less when the dry film thickness is 2 mm The amount of coating is
0.5 to 2.5 kg / m ² is applied, and in the second step, a resin, an aggregate having a particle size of 0.1 to 2 mm , and a stone material coating material containing an extender pigment are laminated with a roller. A laminated roller coating method characterized by applying. 2. The laminated roller coating according to claim 1, wherein the ratio of (resin solid content weight of stone material coating material) :( total weight of aggregate and extender pigment) is 1: 1-10. Method. 3. A stone material coating material is laminated with a roller, wherein the undercoat material is colored, and the color undercoat material is applied and the color difference ΔE from the dried colored undercoat material coating film is 20 or less. Coating is performed, The laminated roller coating method according to claim 1 or 2 .