JP6802670B2 - Aqueous dressing - Google Patents

Description

The present invention relates to a novel water-based coating material.

Conventionally, a water-based covering material using water or the like as a medium has been used as a covering material for the interior of a building.
On the other hand, vegetable powder made from wood, grass, etc. is a natural material and has a unique texture and texture, so that it is expected to be used as an interior material.
For example, as a coating material containing vegetable powder, Patent Document 1 describes an aqueous coating material containing a hydroxyl group-containing aqueous resin and a plant-derived filler (cork powder or the like).

WO2008 / 018616 (Claims 1 and 2)

When such a vegetable powder is used as an interior material, the vegetable powder is present on the surface of the powder and exhibits a unique tactile sensation and texture.
However, since the vegetable powder is a natural material, the color tone tends to vary, which may lead to instability of quality.

In order to solve such a problem, the present inventors have conducted diligent studies, and as a result, by mixing a powder or granular material having a refractive index of 1.3 or more and 1.8 or less together with the vegetable powder, the vegetable powder itself We have found that it is possible to suppress color unevenness and color blurring, and to maximize the unique tactile sensation and texture of vegetable powder, and have completed the present invention.

That is, the present invention has the following features.
1. 1. A water-based coating material containing water in the medium
Aqueous resin, vegetable powder, the refractive index 1.3 to 1.8 of the particulate material, and seeing containing a coloring pigment,
The size of the powder or granular material is 0.1 μm or more and 300 μm or less.
The mixing ratio of the aqueous resin and the powder or granular material is 100 parts by weight or more and 1000 parts by weight or less of the powder or granular material with respect to 100 parts by weight of the solid content of the aqueous resin.
The mixing ratio of the colored pigment is such that the weight ratio of the colored pigment to the powder or granular material ((weight of the colored pigment / weight of the powder or granular material) × 100) is 0.01% by weight or more and 2% by weight or less.
A water-based coating material characterized by this.
2. 2. A water-based coating material containing water in the medium
1. It is characterized by containing an aqueous resin, a vegetable powder, a powder or granular material having a refractive index of 1.3 or more and 1.8 or less, a coloring pigment , and a rust preventive pigment . Aqueous coating material according to.

The present invention is a water-based coating material capable of suppressing color unevenness and color blurring of vegetable powder, stabilizing quality, and maximizing the texture and tactile sensation of vegetable powder. is there.

Hereinafter, modes for carrying out the present invention will be described.

The present invention is an aqueous coating material containing an aqueous resin, a vegetable powder, and a powder or granular material having a refractive index of 1.3 or more and 1.8 or less.

The aqueous resin used in the present invention acts as a binder, for example, acrylic resin, urethane resin, vinyl acetate resin, ethylene resin, silicon resin, epoxy resin, fluororesin, acrylic / vinyl acetate resin, acrylic / urethane resin. , Acrylic / silicon resin, polyvinyl alcohol, cellulose and derivatives thereof, sodium alginate, gum arabic, pectin, xanthan gum, starch and the like, and one or more of these can be used. Further, examples of the form of the water-based resin include a water-soluble resin and a water-dispersible resin (synthetic resin emulsion), but in the present invention, it is preferable to use the water-soluble resin and the water-dispersible resin in combination. By using a water-soluble resin and a water-dispersible resin together, color unevenness and color blurring of the vegetable powder can be suppressed to stabilize the quality, and a coating film with excellent texture and touch of the vegetable powder can be obtained. It is advantageous in terms of obtaining.
When the water-soluble resin and the water-dispersible resin are used in combination, the water-soluble resin: water-dispersible resin is preferably 1:99 to 50:50, more preferably 5:95 to 40: in terms of the solid content weight ratio. It can be 60, more preferably 10:90 to 30:70.

For example, the glass transition temperature of the aqueous resin is not particularly limited, but it is preferable to use one having a temperature of −40 ° C. or higher and 80 ° C. or lower, and further preferably −30 ° C. or higher and 50 ° C. or lower. The glass transition temperature is a value obtained by the Fox calculation formula.
Further, in the case of a synthetic resin emulsion, the particle size is not particularly limited as long as it is 10 nm or more and 500 nm or less. The average particle size of the synthetic resin emulsion is a value measured by a dynamic light scattering method. Specifically, it can be measured using a dynamic light scattering measuring device (“LB-550” manufactured by HORIBA, Ltd.) or the like. (Measurement temperature is 25 ° C.)

The method for producing the aqueous resin is not particularly limited, and the aqueous resin can be produced by a known method.
For example, in the case of a synthetic resin emulsion, it may be produced by a known emulsion polymerization method. For example, as an emulsion polymerization method, it can be produced by a method such as batch polymerization, monomer dropping polymerization, or emulsion monomer dropping polymerization.
Further, during the production of synthetic resin emulsions, emulsifiers such as anionic emulsifiers, nonionic emulsifiers, cationic emulsifiers, amphoteric emulsifiers, azo initiators, peroxidation initiators, persulfate initiators, redox initiators, etc. Initiators such as photopolymerization initiators and reactivity initiators, other solvents, dispersants, emulsion stabilizers, polymerization inhibitors, polymerization inhibitors, buffers, cross-linking agents, pH adjusters, chain transfer agents, catalysts, etc. Can be added in a required amount according to the purpose.

The vegetable powder used in the present invention is obtained by crushing trees, grasses and the like. Such a vegetable powder is a natural material, has a unique hue, texture and texture, and is preferable as an environment-adaptive material.
Plants used as raw materials for vegetable powder include, for example, woody plants such as pine, sugi, cypress, fir, zelkova, nara, lauan, hiba, kiri, beech, oak, and cork oak, reed, orchid, igusa, and rice. , Wheat, Kenaf, Japanese cypress, Japanese oak, etc., and their bark, trunk, branches, leaves, roots, etc. can be used. In addition, fruit bark, seeds, seaweed, sawdust, paddy husks, etc. are used. You can also do it.
Examples of the shape of the vegetable powder include, but are not limited to, spherical, fibrous, plate-like, rod-like, and flannel-like shapes. The size of the vegetable powder is not particularly limited, but preferably 0.01 mm or more and 5 mm or less (more preferably 0.05 mm or more and 3 mm or less) can be used. Such vegetable powder can be used alone or in combination of two or more. The size of the vegetable powder may be calculated by multiplying the maximum distance from the center of gravity of each shape by 2.

The mixing ratio of the aqueous resin and the vegetable powder is preferably 5 parts by weight or more and 500 parts by weight or less, more preferably 10 parts by weight or more and 400 parts by weight or less, based on 100 parts by weight of the solid content of the aqueous resin. More preferably, it is 20 parts by weight or more and 300 parts by weight or less. With such a mixing ratio, a coating film having excellent tactile sensation and texture can be obtained.

The powder or granular material used in the present invention has a refractive index of 1.3 or more and 1.8 or less (preferably 1.35 or more and 1.7 or less, more preferably 1.4 or more and 1.65 or less).
While the above-mentioned vegetable powder has a unique texture and tactile sensation, color unevenness, color blurring, discoloration and the like are likely to occur. In the present invention, by using a powder or granular material having a refractive index of 1.3 or more and 1.8 or less, color unevenness, color blurring, discoloration, etc. of the vegetable powder can be alleviated. That is, it is possible to suppress color unevenness, color blurring, discoloration, etc. while maintaining the texture, texture, and hue of the vegetable powder, and it is possible to stabilize the quality. The refractive index is a value measured using an Abbe refractometer.

The size of the powder or granular material is preferably 0.1 μm or more and 300 μm or less (more preferably 0.5 μm or more and 250 μm or less, still more preferably 1 μm or more and 200 μm or less). The size of the powder or granular material may be calculated by multiplying the maximum distance from the center of gravity of each shape by 2. The above effect can be improved by using a powder or granular material having such a size.

Examples of such powders include calcium carbonate, kaolin, clay, porcelain clay, China clay, talc, mica, silica, aluminum hydroxide, magnesium hydroxide, barium sulfate, cold water stone, feldspar, silica stone, silica sand and the like. Examples thereof include crushed products, glass beads, crushed glass products, crushed resin products, resin beads, etc. In the present invention, one or more selected from calcium carbonate, kaolin, clay, talc, silica, cold water stone, silica sand, etc. It is preferably contained.

The mixing ratio of the aqueous resin and the powder or granular material is such that the powder or granular material is preferably 10 parts by weight or more and 1000 parts by weight or less, more preferably 100 parts by weight or more and 800 parts by weight or less, based on 100 parts by weight of the solid content of the aqueous resin. More preferably, it is 250 parts by weight or more and 600 parts by weight or less. With such a mixing ratio, color unevenness, color blurring, discoloration, etc. of the vegetable powder are alleviated, texture, texture, and hue can be maintained, and quality can be stabilized.

A vegetable powder such as the present invention usually contains a wide variety of components, for example, various sugars, as well as components such as tannin, sesamin, Paulonin, pinoresinol, leucoanthocyanin, and acteoside.
Such components may elute as lye in the water-based dressing and adversely affect the hue of the water-based dressing. In particular, it is known to cause discoloration by contacting with an inorganic substance such as metal. For example, contact with a metal component contained in an aqueous coating material, a metal coating tool such as a trowel or a spray, a metal plate or an inorganic base material, etc. May cause discoloration.
In the present invention, by including the rust preventive pigment as the powder or granular material, discoloration, color unevenness, color blurring and the like caused by the vegetable powder can be further suppressed, and the quality can be stabilized.

Examples of the rust preventive pigment include phosphoric acid-based rust preventive pigments such as zinc phosphate, iron phosphate and aluminum phosphate, and phosphite-based rust preventive pigments such as zinc phosphate, iron phosphite and aluminum phosphite. Pigments, molybdenum acid-based rust preventive pigments such as calcium molybdenate, aluminum molymbdenate, barium molybate, vanadium-based rust preventive pigments such as vanadium oxide, chromate such as strontium chromate, zinc chromate, calcium chromate, potassium chromate, barium chromate. Examples thereof include rust preventive pigments, and one or more of these can be used.

In the present invention, it is particularly preferable to use a rust preventive pigment having a refractive index of 1.3 or more and 1.8 or less. By using such a rust preventive pigment, discoloration, color unevenness, color blurring and the like can be further suppressed, and the effect of the above-mentioned powder or granular material can be exhibited.
For example, in the present invention, one or more selected from phosphoric acid-based rust preventive pigments can be preferably used.
The particle size of the rust preventive pigment is preferably 0.1 μm or more and 200 μm or less (more preferably 0.5 μm or more and 150 μm or less, and further preferably 1 μm or more and 100 μm or less). By using such a rust preventive pigment, the above effect can be improved.

The mixing ratio of the water-based resin and the rust preventive pigment is preferably 0.1 part by weight or more and 50 parts by weight or less, more preferably 0.5 parts by weight or more and 20 parts by weight, based on 100 parts by weight of the solid content of the water-based resin. Parts or less, more preferably 1 part by weight or more and 15 parts by weight or less. With such a mixing ratio, discoloration, color unevenness, color blurring, etc. can be suppressed, and quality can be stabilized.

Further, in the present invention, a colored pigment can be used as long as the effect of the present invention is not impaired.
As for the mixing ratio of the coloring pigment, the weight ratio of the coloring pigment to the powder / granule ((weight of the coloring pigment / weight of the powder / granule) × 100) is preferably 5% by weight or less, more preferably 0.01 weight. % Or more and 2% by weight or less, more preferably 0.05% by weight or more and 1% by weight or less. By using the coloring pigment in such a weight ratio, a desired color tone can be imparted while maintaining the effect of the present invention.

Color pigments include, for example, titanium oxide, zinc oxide, carbon black, lamp black, bone black, graphite, black iron oxide, copper chrome black, cobalt black, copper manganese iron black, red iron oxide, molybdate orange, permanent red, and permanent. Carmine, Anthraquinone Red, Perylene Red, Kinacridone Red, Yellow Iron Oxide, Titanium Yellow, First Yellow, Benzimidazolone Yellow, Chrome Green, Cobalt Green, Phthalocyanine Green, Ultramarine, Navy Blue, Cobalt Blue, Phthalocyanine Blue, Quinacridone Violet, Dioxazine Violet, aluminum pigment, pearl pigment and the like can be mentioned, and one or more of these can be used.

The refractive index of the coloring pigment is not particularly limited, but it is preferable to use one having a refractive index of more than 1.8. The particle size of the coloring pigment is preferably 10 nm or more and 1000 nm or less (more preferably 30 nm or more and 500 nm or less, and further preferably 50 nm or more and 400 nm or less). By using such a coloring pigment, the above effect can be improved.

As the water contained in the water-based coating material of the present invention, water is preferably 200 parts by weight or more and 2000 parts by weight or less, more preferably 500 parts by weight or more and 1500 parts by weight or less, based on 100 parts by weight of the solid content of the water-based resin. Is preferable.

In addition to the above components, the aqueous coating material of the present invention may contain, for example, an aggregate, a plasticizer, an antifreeze agent, a preservative, a fungicide, an antibacterial agent, an antifoaming agent, and a pigment dispersant. , Thickeners, leveling agents, wetting agents, pH regulators, fibers, matting agents, UV absorbers, antioxidants, light stabilizers, adsorbents, catalysts, cross-linking agents, solvents, etc. can be mixed. Such components can be used in appropriate combinations. Further, the present invention does not require the bleaching treatment of the vegetable powder, but does not deny the bleaching treatment.

The water-based coating material of the present invention can be mainly used as a surface finishing material for interior surfaces such as walls and ceilings.
The base material used for walls, ceilings, etc. is not particularly limited, but for example, concrete, mortar, slate board, calcium silicate board, ALC board, extruded board, gypsum board, brick, porcelain tile, siding board, metal board, etc. Examples include plywood. Further, these base materials may be those to which some surface treatment (sealer, surfacer, filler, putty, etc.) has been applied, or those having an existing coating film or the like.

Coating with the amount of the aqueous coating material, depending on the kind of pattern to be formed, preferably 0.1 kg / ^{m 2} or more 4 kg / ^{m 2} or less, more preferably 0.2 kg / ^{m 2} or more 3 kg / ^{m 2} It is about the following. Within the range of such a coating amount, it is possible to apply the coating in a plurality of times. The coating tool is not particularly limited, and for example, a spray, a roller, a trowel, a brush, or the like can be used. At the time of application, a diluent such as water can be mixed to appropriately adjust the viscosity. The dilution ratio is preferably 0% by weight or more and 10% by weight or less. Painting and subsequent drying may be preferably performed at 0 ° C. or higher and 40 ° C. or lower (normal temperature).

Examples are shown below to clarify the features of the present invention.

(Example 1)
Using the raw materials shown in Table 1, the aqueous coating material 1 was produced by mixing and stirring with the formulations shown in Table 2.
As for the vegetable powder, five kinds having different raw material lots were prepared, and the water-based coating material 1 (water-based coating material 1-1 to water-based coating material 1-5) was produced for each lot.
The following test was performed on the obtained water-based coating material 1 (water-based coating material 1-1 to water-based coating material 1-5).

<Painting test 1>
A test piece was prepared by coating the water-based coating material 1 of each lot on a slate plate (base material) subjected to a sealer treatment with a trowel (stainless steel) at a coating amount of 1.5 kg / m ² . .. The water-based coating material and the test piece were produced in an environment of a temperature of 23 ° C. and a relative humidity of 50%.
In the coating test 1, the change in hue of the water-based coating material 1 during coating was evaluated.
The evaluation was made on a three-point scale of A, B, and C, in which the one in which no discoloration was observed in each lot was A, and the one in which blackish discoloration was observed in each lot was C. The results are shown in Table 2.

<Finishing evaluation 1>
The obtained test bodies (test bodies 1-1 to 1-5) were allowed to stand for 2 days in an environment of a temperature of 23 ° C. and a relative humidity of 50%, and then the surface of the test body was visually and touched. Along with the evaluation, the color difference ΔE between each lot was measured. The evaluation is as follows. The results are shown in Table 2.
A ⁺ : There was no color unevenness or color blur for each lot, the quality was very stable (color difference ΔE: less than 1), and an excellent design with the texture and texture of vegetable powder was obtained.
A: There was no color unevenness or color blur for each lot, the quality was stable (color difference ΔE: 1 or more and less than 2), and an excellent design with a texture and texture of vegetable powder was obtained.
B: Color unevenness and color blurring were hardly observed for each lot, the quality was stable (color difference ΔE: 2 or more and less than 5), and an excellent design with a texture and a tactile sensation of vegetable powder was obtained.
C: There was no color unevenness or color blur for each lot, the quality was stable (color difference ΔE: less than 1), and a design with a modest texture of the vegetable powder was obtained.
D: Color unevenness and color blur were observed for each lot (color difference ΔE: 5 or more).
E: Color unevenness and color blur were observed for each lot, and the hue was also discolored (color difference ΔE: 5 or more).
F: The hue of the vegetable powder could not be confirmed.

<Painting test 2>
The painting test was carried out in the same manner as in the painting test 1 except that an iron iron was used instead of the stainless steel trowel. The results are shown in Table 2.

<Finishing evaluation 2>
The same evaluation as in Finish Evaluation 1 was performed except that the test piece obtained in Painting Test 2 was used. The results are shown in Table 2.

(Examples 2 to 22, Comparative Examples 1 to 3)
Using the raw materials shown in Table 1, an aqueous coating material was produced in the same manner as in Example 1 except for the formulation shown in Table 2, and coating tests 1 and 2 and finish evaluations 1 and 2 were performed. The results are shown in Table 2.

Claims (2)

A water-based coating material containing water in the medium
Aqueous resin, vegetable powder, the refractive index 1.3 to 1.8 of the particulate material, and seeing containing a coloring pigment,
The size of the powder or granular material is 0.1 μm or more and 300 μm or less.
The mixing ratio of the aqueous resin and the powder or granular material is 100 parts by weight or more and 1000 parts by weight or less of the powder or granular material with respect to 100 parts by weight of the solid content of the aqueous resin.
The mixing ratio of the colored pigment is such that the weight ratio of the colored pigment to the powder or granular material ((weight of the colored pigment / weight of the powder or granular material) × 100) is 0.01% by weight or more and 2% by weight or less.
A water-based coating material characterized by this. A water-based coating material containing water in the medium
The water-based coating material according to claim 1, further comprising an aqueous resin, a vegetable powder, a powder or granular material having a refractive index of 1.3 or more and 1.8 or less, a coloring pigment , and a rust preventive pigment.