JP6715380B2 - Paint compositions, coatings and articles - Google Patents

Description

The present invention relates to coating compositions, coatings and articles.

The paint is applied to an article to be coated and imparts various protective and decorative functions to the article.

For example, in Patent Document 1, a soft and soft texture without a rough feeling, a deep deep color, a natural fluctuation tone, a gradation, a camouflage tone, a color tone is subtly changed depending on a light hitting angle and a viewing angle, and it is as if the depth is deep. As a coating composition that can achieve a three-dimensional tone as if it were present, and that can maintain a beautiful color tone without being faded even for several years to ten years outdoors, it has a specific fiber length of 2 A coating composition containing a binder resin and a colored short fiber mixture containing various types of colored short fibers in a specific ratio is proposed.

JP, 2003-128997, A

However, as a result of examination by the present inventors, in the coating composition containing the fiber of Patent Document 1, the fiber dispersibility is poor, and the entanglement of fibers during the production of the paint and the entanglement of fiber to the stirrer occur. I understood.

In addition, as a result of studies by the present inventors, it was found that the coating composition containing the fiber of Patent Document 1 has low stability over time.

If the coating composition has a good fiber dispersion, the coating composition can pass through a narrow gap at the time of coating, but as a result of examination by the present inventors, the coating composition containing the fiber of Patent Document 1 It was found that the coating workability was inferior because the fibers such as a brush and a spray were entangled or clogged with fibers during coating.

In addition, as a result of examination by the present inventors, in the coating composition containing the fiber of Patent Document 1, a large amount of fiber lumps (hereinafter, simply referred to as “damage”) is generated when a coating film is formed, and fine fibers are formed. It was also found that it was not possible to give a feeling and the appearance was inferior.

Therefore, an object of the present invention is to provide a coating composition capable of forming a coating film having a good appearance and having good fiber dispersibility and coating workability.

Another object of the present invention is to provide a coating film having high designability due to fibers and a good appearance, and an article having the coating film.

The coating composition according to the present invention,
A coating composition comprising fibers, a viscosity modifier, and a solvent,
The ratio of the mass of the fibers to the total mass of the coating composition is 10 mass% or less,
The mass ratio of the viscosity modifier to the total mass of the coating composition is 0.1 to 7 mass%,
The coating composition has a mass ratio of the viscosity modifier to the fibers of 0.05 or more. This makes it possible to form a coating film having a good appearance and provide a coating composition having good fiber dispersibility and coating workability.

In one embodiment of the coating composition according to the present invention, a resin is further included.

In one embodiment of the coating composition according to the present invention, the viscosity modifier is one or more selected from the group consisting of a synthetic resin viscosity modifier and a natural product viscosity modifier.

In one embodiment of the coating composition according to the present invention, the viscosity modifier is selected from the group consisting of urethane-modified polyether, acrylic polymer, cellulosic water-soluble polymer, crystalline cellulose, and chitin/chitosan derivative. It is more than one kind.

The coating film according to the present invention is a coating film produced by using any one of the above coating compositions. This makes it possible to provide a coating film having high designability due to fibers and a good appearance.

The article according to the present invention is an article having the above coating film. As a result, it is possible to provide an article having high designability and good appearance due to the fibers.

ADVANTAGE OF THE INVENTION According to this invention, the coating composition which can form a coating film which has a favorable external appearance, and which has favorable fiber dispersibility and coating workability can be provided. Further, according to the present invention, it is possible to provide a coating film having high designability and good appearance of fibers and an article having the coating film.

Hereinafter, embodiments of the present invention will be described. These descriptions are intended to exemplify the invention and are not intended to limit the invention in any way.

In the present invention, two or more embodiments can be arbitrarily combined.

In the present specification, paint and paint composition are used interchangeably.

(Paint composition)
The coating composition according to the present invention,
A coating composition comprising fibers, a viscosity modifier, and a solvent,
The ratio of the mass of the fibers to the total mass of the coating composition is 10 mass% or less,
The mass ratio of the viscosity modifier to the total mass of the coating composition is 0.1 to 7 mass%,
The coating composition has a mass ratio of the viscosity modifier to the fibers of 0.05 or more.

Hereinafter, the fiber, the viscosity modifier, and the solvent contained in the coating composition according to the present invention will be exemplified.

<Fiber>
The fibers in the coating composition of the present invention have a function of imparting a design property to a coating film using the coating composition. The fibers may be used alone or in combination of two or more.

The fibers in the coating composition of the present invention are not particularly limited, and examples thereof include known fibers such as natural fibers, organic synthetic fibers, and inorganic fibers.

Examples of the natural fibers include natural fibers such as kozo, mitsumata, goose bark, cotton, hemp, wool, silk, alpaca, angora, cashmere, mohair and the like. In addition to these, for example, plant fibers, animal fibers, mineral fibers and the like described in JIS L 0204-1 may be mentioned.

Examples of the organic synthetic fiber include para-aramid, meta-aramid, polyethylene, polyacrylate, poly(paraphenylenebenzobisoxazole) (PBO) fiber, polyphenylene sulfide (PPS), polyimide, fluorine fiber, rayon, polyamide, polyester. , And organic fibers such as polylactic acid. Besides, for example, the chemical fiber described in JIS L 0204-2 and the like can be mentioned.

Examples of the inorganic fibers include inorganic fibers such as glass fibers, carbon fibers, alumina fibers, silicon carbide fibers and boron fibers.

The length, diameter, aspect ratio, shape, etc. of the fiber are not particularly limited and may be appropriately selected.

In the present invention, the fiber length is determined by randomly selecting 10 fibers and using an optical microscope or a ruler, and taking the number average of the 10 lengths as the fiber length. The fiber diameter is determined by randomly selecting ten fibers and using a scanning electron microscope (SEM). The number average of the thicknesses of the ten fibers is taken as the fiber diameter.

In one embodiment, the fiber length is 0.1 mm or greater, 0.5 mm or greater, 1 mm or greater, 3 mm or greater, 5 mm or greater, 12 mm or greater, 15 mm or greater, 30 mm or greater, or 50 mm or greater. In one embodiment, the fiber length is 50 mm or less, 40 mm or less, 30 mm or less, 15 mm or less, 12 mm or less, 5 mm or less, 3 mm or less, 1 mm or less, or 0.5 mm or less. In another embodiment, the fiber length is 0.1-50 mm.

In one embodiment, the fiber diameter is 10 μm or more, 12 μm or more, 50 μm or more, 100 μm or more, 150 μm or more, or 200 μm or more. In one embodiment, the fiber diameter is 200 μm or less, 150 μm or less, 100 μm or less, 50 μm or less, 12 μm or less, or 10 μm or less.

In one embodiment, the ratio of the fiber length to the fiber diameter, that is, the aspect ratio, is 20 or more, 50 or more, 75 or more, 100 or more, 250 or more, 300 or more, 500 or more, 1000 or more, 2000 or more, 2500 or more, 3000 or more. Alternatively, it is 3500 or more. In one embodiment, the aspect ratio is 3500 or less, 3000 or less, 2500 or less, 2000 or less, 1000 or less, 500 or less, 300 or less, 250 or less, 100 or less, 75 or less or 50 or less.

In one embodiment of the coating composition according to the present invention, the fiber has a length of 0.1 to 50 mm and an aspect ratio of 20 to 3500.

The fibers may be used alone or in the form of solution or gel.

The ratio of the mass of the fibers to the total mass of the coating composition is larger than 0% by mass because the coating composition contains the fibers (even if the ratio of the fibers is small, the design property of the fibers is imparted to the coating film), and It is 10 mass% or less. In one embodiment, the ratio is 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1% by mass or more, 2% by mass or more, 3% by mass or more, 4% by mass or more, It is 5 mass% or more, 6 mass% or more, 7 mass% or more, 8 mass% or more, or 9 mass% or more. In one embodiment, the ratio is 9 mass% or less, 8 mass% or less, 7 mass% or less, 6 mass% or less, 5 mass% or less, 4 mass% or less, 3 mass% or less, 2 mass% or less, or 1 It is not more than mass %. From the viewpoint of obtaining excellent fiber dispersibility, the ratio of the mass of the fibers to the total mass of the coating composition is preferably 6 mass% or less.

<Viscosity modifier>
The viscosity modifier in the coating composition of the present invention functions to disperse fibers or suppress entanglement of fibers, and may also function as a film-forming element.

The viscosity modifier in the coating composition of the present invention is not particularly limited, and known viscosity modifiers and thickeners for paints can be used.

The viscosity modifier in the coating composition of the present invention may be used alone or in combination of two or more.

Examples of the viscosity modifier in the coating composition of the present invention include synthetic resin viscosity modifiers, natural product viscosity modifiers, inorganic viscosity modifiers and the like. Furthermore, examples of the synthetic resin-based viscosity modifier include a polymer-type viscosity modifier and an associative-type viscosity modifier.

The polymer type viscosity modifier enhances the fiber dispersibility by dispersing the fibers due to the entanglement of the polymer chains between the fibers or suppressing the entanglement between the fibers.

Examples of the polymer type viscosity modifier include acrylic polymers and the like.

The weight average molecular weight of the polymer type viscosity modifier is, for example, 100,000 to 5,000,000.

Examples of commercially available products of the acrylic polymer as the high-molecular viscosity modifier include, for example, SN Thickener 920, 929, 929S, 608, 613, 615, 617, 618, 630, 634, 636 under the trade name SN Thickener manufactured by San Nopco. , 640, 651, IN-209 and other SN thickener series; Sannopco's trade name Nopal 717T and other Nopal series, Toagosei's trade name Aron (registered trademark) A-20P-X, A-20L, A-30 etc. are mentioned.

The associative viscosity modifier is a polymer having a hydrophilic group and a hydrophobic group in the molecule, and enhances the dispersibility of the fiber by associating the hydrophilic groups or the hydrophobic groups with each other between the molecules. Further, for example, in the case of an aqueous emulsion, the dispersibility of the fiber can be enhanced by associating the hydrophilic group on the emulsion surface with the hydrophilic group of the molecule of the associative viscosity modifier.

Examples of the hydrophobic group of the associative viscosity modifier include an optionally substituted functional group having a small polarity such as an alkyl group and a phenyl group. As the hydrophilic group, for example, a highly polar functional group such as a hydroxyl group, an amide group, a carboxyl group, or the like can be given.

Examples of the associative viscosity modifier include urethane-modified polyether and the like.

The molecular weight of the associative viscosity modifier is, for example, 1,000 to 50,000.

Examples of commercially available urethane-modified polyethers as an associative viscosity modifier include, for example, SN Thickener 612, 612NC, 619, 621N, 621TF, 623N, 624N, 625N, 627N, 629N, 660T, manufactured by San Nopco Ltd. SN thickener series such as 665T; product name Nopal 700N, 710N, 3303, etc. manufactured by San Nopco; product name Emanon (registered trademark) 3299V, product name manufactured by Kao; ADEKANOL (registered trademark) UH140S, product by ADEKA , UH814 and the like; and CEOLUS (registered trademark) RC-591 manufactured by Asahi Kasei Chemicals Corporation.

As the viscosity modifier, in addition to those described above, a swelling dispersion of a fatty acid amide, a amide-based fatty acid, a polyamide-based viscosity modifier such as a long-chain polyaminoamide phosphate, and a polyethylene-based swelling dispersion of a polyethylene oxide or the like. Viscosity modifiers; Organic acid smectite clay, organic bentonite viscosity modifiers such as montmorillonite; Cellulose viscosity modifiers such as viscose, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose; Alkaline viscosity of sodium polyacrylate, polyvinyl alcohol, carboxymethyl cellulose, etc. Adjusting agents; associative viscosity adjusting agents such as polyvinyl alcohol and polyethylene oxide, and chitin/chitosan derivatives using crustaceans as a raw material.

As a commercial product of the viscosity modifier, other than those described above, for example, Primal (registered trademark) TT-615, ASE-60, RM-5, RH-1020, and RM-2020NPR manufactured by Rohm & Haas Co. (Registered trademark) series; trade name Thixol53L manufactured by Coatex, Viscocoat series; trade name Daicel Chemical Co., Ltd. Daicel SP series; trade name BERMODOL PUR series manufactured by AKZO NOBEL; trade name ADEKANOL manufactured by ADEKA (registered trademark) Adecanol (registered trademark) UH series such as UH-420, UH-462, UH-472, UH-540, and UH-814N; Kuraray's trade name Kuraray Poval; BYK's trade name OPTIFLO series and the like. ..

Commercial products of natural product viscosity modifiers include hydroxyethyl cellulose (cellulose-based water-soluble polymer) manufactured by Sumitomo Seika Co., Ltd., and CEOLUS (registered trademark) RC-591 (crystalline cellulose) manufactured by Asahi Kasei Chemicals Corporation. Cellulose-based viscosity modifiers: marine nanofibers manufactured by Marine Nanofiber (registered trademark) ID-05 and other chitin/chitosan derivatives; AKZO NOBEL manufactured by BERMOCOLL; SE Tylose manufactured by Tyrose MH To be

Examples of the inorganic viscosity modifier include smectite, layered silicate, metal chelate and the like.

Commercially available inorganic viscosity modifiers include, for example, layered silicates such as those manufactured by BYK under the trade name OPTIGEL (registered trademark) series; smectites such as trade name aluminum magnesium silicate manufactured by Sansho Co., Ltd., Matsumoto Fine Chemical Co. Organics (registered trademark) TC-310, TC-400, ZC-150, ZC-540, and other Organics (registered trademark) series manufactured by Kawaken Fine Chemicals Co., Ltd. ..

In one embodiment of the coating composition according to the present invention, the viscosity modifier is one or more selected from the group consisting of a synthetic resin viscosity modifier and a natural product viscosity modifier.

In one embodiment of the coating composition according to the present invention, the viscosity modifier is selected from the group consisting of urethane-modified polyether, acrylic polymer, cellulosic water-soluble polymer, crystalline cellulose, and chitin/chitosan derivative. It is more than one kind.

The ratio of the mass of the viscosity modifier to the total mass of the coating composition is 0.1 to 7 mass %. When used in the form of a solution in which a viscosity modifier and a solvent are combined, such as a commercially available viscosity modifier, it may be adjusted to a range of 0.1 to 7% by mass based on the mass of the viscosity modifier excluding the solvent. .. In one embodiment, the ratio of the mass of the viscosity modifier to the total mass of the coating composition is 0.5% by mass or more, 0.6% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2 4.0 mass% or more, 2.5 mass% or more, 3.0 mass% or more, 3.5 mass% or more, 4.0 mass% or more, 4.5 mass% or more, 5.0 mass% or more, 5. It is 5 mass% or more, 6.0 mass% or more, or 6.5 mass% or more. In one embodiment, the ratio is 6.5 mass% or less, 6.0 mass% or less, 5.5 mass% or less, 5.0 mass% or less, 4.5 mass% or less, 4.0 mass% or less. 3.6 mass% or less, 3.5 mass% or less, 3.0 mass% or less, 2.5 mass% or less, 2.0 mass% or less, 1.5 mass% or less, or 1.0 mass% or less Is. From the viewpoint of obtaining excellent fiber dispersibility, the ratio of the mass of the viscosity modifier to the total mass of the coating composition is preferably 0.6 to 3.6 mass %.

In the coating composition according to the present invention, the mass ratio of the viscosity modifier to the fiber (mass of viscosity modifier/mass of fiber) is 0.05 or more. When the mass ratio is 0.05 or more, the action of dispersing the fibers by the viscosity modifier or suppressing the entanglement of the fibers is enhanced. In one embodiment, the mass ratio is 0.1 or more, 0.2 or more, 0.5 or more, 0.6 or more, 0.7 or more, 0.8 or more, 0.9 or more, 1.0 or more, 2.0 or more, 3.0 or more, 4.0 or more, 5.0 or more, 10 or more, 15 or more, 20 or more, 50 or more, 70 or more, 100 or more, 150 or more, 200 or more, 300 or more, or 400 or more Is. In one embodiment, the mass ratio is 500 or less, 450 or less, 400 or less, 300 or less, 200 or less, 150 or less, 100 or less, 75 or less, 50 or less, 20 or less, 15 or less, 10 or less, 9.0 or less. , 8.0 or less, 7.0 or less, 6.0 or less, 5.0 or less, 4.0 or less, 3.0 or less, 2.0 or less, or 1.0 or less. From the viewpoint of obtaining excellent fiber dispersibility, the mass ratio of the viscosity modifier to the fibers is preferably 0.1 or more, more preferably 0.2 to 15.

<Solvent>
As the solvent, a known solvent used in the field of coating materials can be appropriately selected and used, and is not particularly limited. The solvent may be used alone or in combination of two or more.

Examples of the solvent include water and organic solvents. Examples of the organic solvent include alcohols such as methanol, ethanol, 2-propanol, 1-butanol; ethyl acetate, butyl acetate, isobutyl acetate, ethyl propionate, ethylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol. Esters such as monoethyl ether acetate; ethers such as diethyl ether, propylene glycol monomethyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, dioxane, tetrahydrofuran (THF); ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol Glycols such as 1,3-butylene glycol, pentamethylene glycol, and 1,3-octylene glycol; formamide, N-methylformamide, dimethylformamide (DMF), dimethylacetamide, dimethylsulfoxide (DMSO), N- Amides such as methylpyrrolidone (NMP); ketones such as acetone, methylethylketone (MEK), methylpropylketone, methylisobutylketone, acetylacetone, cyclohexanone; aliphatic hydrocarbons such as mineral spirits and kerosene; toluene, xylene, mesitylene, Aromatic hydrocarbons such as dodecylbenzene; halogen-based solvents such as chloroform and dichloromethylene, and the like.

In one embodiment, the solvent is deionized water.

The amount of the solvent may be appropriately adjusted in consideration of coating workability and the like, and is not particularly limited.

<Resin>
In one embodiment of the coating composition according to the present invention, a resin is further included. The resin has a function as a film forming element, but as described above, the viscosity modifier may also have a function as a film forming element. In the present invention, among the resins, those that act as a viscosity modifier are included in the viscosity modifier and not included in the resin.

As the resin, a known resin used in the paint field can be appropriately selected and used, and is not particularly limited. Examples of the resin include acrylic resin, polyester resin, alkyd resin, fluororesin, epoxy resin, polyurethane resin, polyether resin and the like.

Further, as the resin, for example, a polymer compound containing or consisting of an inorganic component such as a silicone resin or an alkoxysilane condensate can be used.

In addition, as the resin, for example, hydrophilic polymers such as polyamide, polyvinyl alcohol, cellulose, amylose, amylopectin, polyacrylamide, and polyacrylic acid can be used.

Further, the resin may be a curable resin having a crosslinkable functional group or a resin that is cured by fusion drying. As the cross-linking agent, a conventionally known cross-linking agent can be used. Examples of the cross-linking agent include thermal cross-linking cross-linking agents such as isocyanate, diacetone acrylamide room temperature cross-linking cross-linking agents, and photo-cross-linking cross-linking agents such as organic peroxides. The crosslinking agent may be used alone or in combination of two or more.

As the resin, a resin of a conventionally known water-based coating composition can also be used.

The resin may be used alone or in combination of two or more.

The amount of resin is not particularly limited and may be appropriately adjusted. For example, the ratio of the mass of the resin solid content to the total mass of the coating composition is 0.01 to 50 mass %. In one embodiment, the ratio of the mass of resin solids to the total mass of the coating composition is 3 to 10 mass %.

<Other ingredients>
In the coating composition according to the present invention, in addition to the components described above, a pigment, a defoaming agent, a pigment dispersant, a film-forming aid, an antifreezing agent, an anti-sagging agent, an anti-settling agent, a crosslinking accelerator, a curing agent, It may contain other components such as a leveling agent, a surface conditioner, a plasticizer, an antiseptic, an antifungal agent and an ultraviolet stabilizer. Each of these other components may be used alone or in combination of two or more.

<Method for preparing coating composition>
The method for preparing the coating composition is not particularly limited, and can be prepared by mixing fibers, a viscosity modifier, a solvent, and other components such as a resin and a pigment, if necessary, in any order. ..

(Coating film)
The coating film according to the present invention is a coating film produced by using any one of the above coating compositions. This makes it possible to provide a coating film having high designability due to fibers and a good appearance.

<Method for producing coating film>
The method for producing the coating film is not particularly limited, and a conventionally known coating method can be used. For example, it can be applied using a roller, a brush, a spray or the like. The drying temperature after applying the coating composition may be appropriately adjusted depending on the solvent and the like. For example, when drying in a short time such as 10 seconds to 30 minutes is required, the temperature can be set to 40 to 200°C, and 60 to 160°C is preferable. If it is not necessary to dry in a short time, it may be dried at room temperature or the like.

The thickness of the dry coating film is not particularly limited and may be appropriately adjusted depending on the application. For example, the thickness of the dry coating film may be 1 μm to 2 cm.

(Article)
The article according to the present invention is an article having the above coating film. As a result, it is possible to provide an article having high designability and good appearance due to the fibers.

The article is not particularly limited. For example, an article having a coating film on an object to be coated, such as a construction machine, a working machine; a vehicle such as an automobile, a train, a bullet train, a bus, or a taxi; a ship; an aircraft such as an airplane or a helicopter; Buildings or structures such as apartments, office buildings, public facilities, commercial facilities, research facilities, military facilities, tunnels; ceilings, roofs, pillars, signs, doors, gates, walls; bridges; vending machines; road signs; Signals; street lights; electronic bulletin boards such as LED systems, liquid crystal systems, light bulb systems; building materials at construction sites; stone monuments; tombstones; clothing; footwear such as shoes; rain gear such as umbrellas; packaging materials; printing paper, information paper, wrapping paper Such as paper; a film or tape for sticking to glass or the like; furniture such as shelves, cabinets, partition boards, or office equipment.

Hereinafter, the present invention will be described in more detail with reference to Examples, but these Examples are intended to illustrate the present invention and do not limit the present invention in any way. Unless otherwise specified, the blending amount is in grams.

Details of the materials used in the examples are as follows.
<Fiber>
Polyethylene fiber (synthetic fiber): made by Teijin Frontier, fiber length 5 mm, fiber diameter 12 μm, aspect ratio 417, written as “PEs1” in the table Polyethylene fiber (synthetic fiber): made by Teijin Frontier, fiber length 20 mm, fiber diameter 12 μm , Aspect ratio 1667, written as “PEs2” in the table Polyethylene fiber (synthetic fiber): manufactured by Teijin Frontier, fiber length 38 mm, fiber diameter 12 μm, aspect ratio 3167, written as “PEs3” in the table Kozo (natural fiber): millet Gami Factory, fiber length 13 mm, fiber diameter 200 μm, aspect ratio 65
San Tsubaki (natural fiber): manufactured by Awagami Factory, fiber length 5 mm, fiber diameter 125 μm, aspect ratio 40
Goosehide (natural fiber): Awagami Factory, fiber length 6 mm, fiber diameter 80 μm, aspect ratio 75
<Viscosity modifier>
Viscosity modifier: acrylic polymer (polymeric viscosity modifier), manufactured by San Nopco, trade name SN Thickener 618 (concentration 12%), described as "618" in the table Viscosity modifier: acrylic polymer (polymer Viscosity modifier), manufactured by San Nopco, trade name SN Thickener 617 (concentration 20%), indicated as “617” in the table Viscosity modifier: acrylic polymer (polymeric viscosity modifier), manufactured by San Nopco Name SN thickener 615 (concentration 10%), described as "615" in the table Viscosity modifier: urethane modified polyether (associative viscosity modifier), manufactured by San Nopco, trade name SN thickener 612 (concentration 40%), table Viscosity modifier expressed as "612": Urethane modified polyether (association type viscosity modifier), manufactured by San Nopco, trade name SN Thickener 665T (concentration 30%), "665T" expressed in the table Viscosity modifier: urethane modified poly Ether (associative viscosity modifier), manufactured by San Nopco, trade name SN Thickener 621N (concentration 30%), described as "621N" in the table Viscosity modifier: Cellulose water-soluble polymer (polymeric viscosity modifier), Sumitomo Seika's trade name, hydroxyethyl cellulose (concentration 100%), written as "HEC" in the table Viscosity modifier: Association type viscosity modifier, Kao's trade name, Emanon (registered trademark) 3299V (concentration 90%) "3299V" in the table, Viscosity modifier: Associative viscosity modifier, manufactured by ADEKA, trade name Adecanol (registered trademark) UH140S (concentration 30%), "UH140S" in Table, viscosity modifier: Associative viscosity Adjuster, manufactured by ADEKA, trade name ADEKANOL (registered trademark) UH814 (concentration 30%), written as "UH814" in the table Viscosity modifier: Cellulose-based viscosity modifier (associative viscosity modifier), manufactured by Asahi Kasei Chemicals, Product name CEOLUS (registered trademark) RC-591 (concentration 100%), written as “RC-591” in the table Viscosity modifier: Chitin nanofiber (natural product viscosity modifier), Marin Nanofiber Co., Ltd., trade name Marin Nanofiber (registered trademark) ID-05 (concentration 100%, of which 5% active ingredient), written as "ID-05" in the table <solvent>
Ion exchange water <resin>
Resin 1: Polyethylene oxide, manufactured by Meisei Chemical Industry Co., Ltd., trade name Alcox (registered trademark) L-11, solid content ratio 100%
Resin 2: DAAM-ADH cross-linking resin, manufactured by Saiden Chemical Company, trade name NP-7267, solid content ratio 43%
Resin 3: Aqueous two-component urethane resin (cross-linking type), manufactured by DIC, trade name Burnock (registered trademark) WE-314, solid content ratio 45%, and manufactured by Nippon Paint Industrial Coatings, trade name Aude Uretop ( (Registered trademark) curing agent resin 4: aqueous acrylic resin emulsion (fusion type), manufactured by Saiden Chemical Co., Ltd., trade name Cybinol (registered trademark) NP-555, solid content ratio 48%
Resin 5: Aqueous 1-liquid silanol group-containing polyether urethane resin, manufactured by Mitsui Chemicals, Inc., trade name Takelac (registered trademark) WS-6021, solid content ratio 30%

Details of the apparatus and the like used in the examples are as follows.
High-speed disperser (Homo Disper): PRIMIX, product name Homo Disper 2.5 type, Disper blade (diameter 5.9 cm, number of notches 12, notch height 0.7 cm)
Brush: Otsuka Brush Co., Ltd., Shima brush gold winding brush No. 10 (hair length 19 mm, brush width 30 mm)
Glass plate: manufactured by TP Giken Co., Ltd., product name 150 x 100 x 2.0 mm

(Examples 1-42 and Comparative Examples 1-4)
A coating composition was prepared by mixing the components in the formulations shown in Tables 1 to 4. In the table, the blending amount of fibers represents the blending amount of solid content, and the amount of water contained in the fiber material is summarized in the blending amount in the column of water.

When preparing the coating composition, the fiber dispersibility described below was measured and evaluated.

(Fiber dispersibility)
A container having a diameter of 8.5 cm was filled with a mixture of the components shown in Tables 1 to 4 to a height of 5 cm, and a homodisper was used to stir the disper blade at a height of 2.5 cm from the container at a speed of 1800 rpm for 30 minutes. did. Then, the disper blade was exposed from the liquid surface in the container, and the mixture was idle-stirred at 1000 rpm for 60 seconds. Then, the mass (residual amount) of the coating composition containing fibers remaining on the disper blade was measured. The measurement was repeated twice, and the average value of the remaining amount of the two times was used for evaluation according to the following criteria. The evaluation results are also shown in Tables 1 to 4. The smaller the residual amount is, the better the fiber dispersibility is, and the score 5 indicates that the fiber dispersibility is most excellent. A score of 3 to 5 is acceptable.
<Evaluation criteria>
Rating 5: Residual amount is less than 1 g Rating 4: Residual amount is 1 g or more and less than 5 g Rating 3: Residual amount is 5 g or more and less than 10 g Rating 2: Residual amount is 10 g or more and less than 20 g Rating 1: Residual amount is 20 g or more

(Paint workability)
According to the following evaluation method, each coating composition was coated three times to obtain the ratio (coating rate) (%) of the coated coating composition for each coating, and the average value (%) of the coating rate for the three coatings was calculated. ) Was asked.
<Evaluation method>
0.2 g of each coating composition is weighed, and the coating composition is spread on a glass plate having a length of 10 cm and a width of 15 cm to a width of 1 cm and a width of 2 cm. Then, the spread coating material is applied to a length of 7 cm at a speed of 1 cm/sec using an applicator having a gap adjusted to 10 mil (254 μm). Next, the coating composition that could not pass through the gap is sampled and weighed, and its mass is defined as Xg. Since the coating rate (%) is the ratio of the amount of the coating composition that could pass through the gap to the amount of the coating composition used of 0.2 g, the coating rate (%) was calculated by the following formula. ..
Coating rate (%)=(0.2−X)×100/0.2
The higher the coating rate, the better the coating workability, and a rating of 5 indicates the highest coating workability.
<Evaluation criteria>
Rating 5: Average value of coating rate is 80% or more Rating 4: Average value of coating rate is 70% or more and less than 80% Rating 3: Average value of coating rate is 60% or more and less than 70% Rating 2: Coating The average value of the rates is 50% or more and less than 60% Score 1: The average value of the coating rate is less than 50%

(Appearance of coating film)
Using a brush, 10 g of each coating composition was reciprocated 10 times on a glass plate at a distance of 10 cm with a brush width. Then, the coated glass plate was dried at 60° C. for 40 minutes to form a coating film. The same operation was performed by changing the glass plate, and the coating film was formed three times in total. Then, the number of lumps (lumps having a diameter of 1 mm or more), which are entanglements of fibers, was measured for the three formed coating films. The average value of the damascene number of three coating films was used. The following criteria were evaluated. The evaluation results are also shown in Tables 1 to 4. The smaller the number of lumps, the better the appearance of the coating film, and a score of 5 indicates the best appearance of the coating film. A score of 3 to 5 is acceptable.
<Evaluation criteria>
Rating 5: Average Dama Number is less than 10 Rating 4: Average Dama Number is 10 or more and less than 25 Rating 3: Average Dama Number is 25 or more and less than 50 Rating 2: Average Dama Number is 50 or more and less than 90 Rating 1: 90 or more average lumps

As shown in Tables 1 to 4, in Examples, a coating composition capable of forming a coating film having a good appearance, having good fiber dispersibility and coating workability, high designability by fibers, and good appearance It was possible to obtain a coating film having the following formula and an article having the coating film.

ADVANTAGE OF THE INVENTION According to this invention, the coating composition which can form a coating film which has a favorable external appearance, and which has favorable fiber dispersibility and coating workability can be provided. Further, according to the present invention, it is possible to provide a coating film having high designability and good appearance of fibers and an article having the coating film.

Claims (6)

A coating composition comprising a fiber having a length of 3 to 50 mm , a viscosity modifier, and a solvent,
The ratio of the mass of the fibers to the total mass of the coating composition is 0.5 to 10 mass % ,
The mass ratio of the viscosity modifier to the total mass of the coating composition is 0.1 to 7 mass%,
The coating composition, wherein the mass ratio of the viscosity modifier to the fibers is 0.24 to 500 . The coating composition according to claim 1, further comprising a resin. The coating composition according to claim 1 or 2, wherein the viscosity modifier is one or more selected from the group consisting of synthetic resin viscosity modifiers and natural product viscosity modifiers. The viscosity modifier is one or more selected from the group consisting of urethane-modified polyether, acrylic polymer, water-soluble cellulose polymer, crystalline cellulose, chitin derivative and chitosan derivative. The coating composition according to any one of items. A coating film produced using the coating composition according to any one of claims 1 to 4. An article having the coating film according to claim 5.