CN112313299A - Coating composition and method for forming coating film - Google Patents
Coating composition and method for forming coating film Download PDFInfo
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- CN112313299A CN112313299A CN201980041440.2A CN201980041440A CN112313299A CN 112313299 A CN112313299 A CN 112313299A CN 201980041440 A CN201980041440 A CN 201980041440A CN 112313299 A CN112313299 A CN 112313299A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/02—Polyureas
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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Abstract
The invention provides a coating composition which can form a coating film which is tough in deterioration and abrasion caused by passing of vehicles and the like and can form a coating film with long service life. The present invention for solving the above problems is a coating composition comprising a solventless main agent composition and a solventless curing agent composition, wherein the solventless main agent composition comprises a coating film forming resin, a pigment and an organic metal catalyst, the coating film forming resin comprises at least 1 selected from polyols and aromatic polyfunctional amines, the pigment comprises at least 1 selected from carbonates, titanium oxide, zinc oxide, precipitated barium sulfate, talc, silica and kaolin, the solventless curing agent composition comprises at least 1 selected from aliphatic polyfunctional isocyanate compounds and aromatic polyfunctional isocyanate compounds, and the ratio (L/D) of the distance between the surfaces of pigment-dispersed particles (L) and the average particle diameter (D) of the pigment-dispersed particles of the coating film comprising the coating composition is 0.4 to 2.0.
Description
Technical Field
The present invention relates to a coating composition and a method for forming a coating film using the same.
Background
Since a coating film for pavement marking is deteriorated or worn due to passage of vehicles, etc., it is necessary to perform maintenance such as regular recoating or repair using a coating composition for forming a coating film for pavement marking.
As a coating composition for forming such a coating film for marking a road surface, an invention described in japanese patent application laid-open No. 2016-89036 (patent document 1) can be cited, and patent document 1 discloses a coating composition for marking a road surface, which is characterized by comprising an emulsion-based water-based coating material containing 30 to 60 wt% of calcium carbonate particles, silica sand, silica or ceramic particles having a particle diameter of 100 to 2,000 μm.
Jp 2004-182917 a (patent document 2) discloses a water-based coating composition for marking road surfaces, which is obtained by adding an inorganic filler (excluding a pigment) to an emulsion-based water-based coating material, wherein the inorganic filler is added in an amount capable of imparting abrasion resistance to the coated surface by a hard inorganic filler having a mohs hardness of 5 or more.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2016-89036
Patent document 2: japanese patent laid-open publication No. 2004-182917.
Disclosure of Invention
Problems to be solved by the invention
Even when a coating film is formed from the coating compositions described in patent documents 1 and 2, there is a problem that abrasion of the coating film cannot be sufficiently suppressed.
On the other hand, in recent years, techniques for automatically driving a vehicle have been studied, and it is assumed that the vehicle is automatically driven based on information on a road surface marking coating film such as a white line. However, if the white line disappears due to deterioration or abrasion caused by the passage of the vehicle or the like, there is a possibility that the vehicle will be automatically driven, and in order to further improve the accuracy of automatic driving, the coating film for road marking is required to have high durability such as abrasion resistance. Further, high recognizability is required.
The present invention has been made to solve the above problems, and an object of the present invention is to provide a coating composition which can form a coating film that is tough against deterioration and abrasion due to passage of a vehicle or the like, and can form a coating film having a long service life.
Means for solving the problems
In order to solve the above problem, the present invention provides the following embodiments.
[1] A coating composition comprising a solvent-free main agent composition and a solvent-free curing agent composition,
the solvent-free base composition comprises a coating film-forming resin, a pigment and an organometallic catalyst,
the coating film-forming resin contains at least 1 selected from the group consisting of a polyol and an aromatic polyfunctional amine,
the pigment contains at least 1 selected from carbonate, titanium oxide, zinc oxide, precipitated barium sulfate, talc, silica and kaolin,
the solvent-free curing agent composition contains at least 1 selected from the group consisting of an aliphatic polyfunctional isocyanate compound and an aromatic polyfunctional isocyanate compound,
the ratio (L/D) of the distance (L) between the surfaces of the pigment-dispersed particles to the average particle diameter (D) of the pigment-dispersed particles in a coating film containing the coating composition is 0.4 to 2.0.
[2] [1]The coating composition, wherein the equivalent of NCO groups contained in the solvent-free curing agent composition, the equivalent of OH groups contained in the solvent-free main agent composition and NH are2The ratio of the equivalents of the radicals taken together [ NCO/(OH + NH)2)]Is 0.5 to 2.0 inclusive.
[3] [1] the coating composition according to [1] or [2], wherein the amount of the pigment is 5 to 55 parts by mass per 100 parts by mass of solid content of the coating composition.
[4] The coating composition according to any one of [1] to [3], wherein the pigment dispersion particles of the pigment have an average particle diameter (D) of 0.2 μm or more and 50 μm or less.
[5] The coating composition according to any one of [1] to [4], wherein the carbonate is calcium carbonate.
[6] [5] the coating composition according to [5] wherein the amount of the calcium carbonate is 5 to 55 parts by mass per 100 parts by mass of the solid content of the coating composition.
[7] The coating composition according to any one of [1] to [6], which is a coating composition for marking a road surface and/or a coating composition for insulating a road surface.
[8] The coating composition according to any one of [1] to [6], which is at least 1 selected from the group consisting of a coating composition for coating an inner surface of an iron pipe, a coating composition for coating an outer surface of an iron pipe, and a coating composition for coating an inner surface and an outer surface of an iron pipe.
[9] The coating composition according to any one of [1] to [8], wherein a coating film of the coating composition having a thickness of 200 μm has an abrasion loss of 120mg or less in an abrasion resistance test according to JIS K5600-5-9.
[10] A method for forming a coating film, which comprises applying the coating composition as defined in any one of the above [1] to [9] to a substrate,
The aforementioned coated coating composition is cured,
the aforementioned coating is performed by at least 1 method selected from the group consisting of spray coating, slot coater coating, and flow coating.
Effects of the invention
The coating composition of the present invention can form a coating film having excellent abrasion resistance and long service life. Further, the present invention can provide a coating composition having excellent two-component miscibility. The coating composition of the present invention can sufficiently and uniformly mix the solvent-free main agent composition and the solvent-free curing agent contained in the coating composition, and therefore, the mixture can sufficiently react to form a tough coating film after being coated on a road surface. Therefore, a coating composition having a longer service life than conventional road surface marking coatings can be provided.
Drawings
Fig. 1 is a schematic cross-sectional view of a coating film showing the relationship between the distance (L) between the surfaces of the pigment-dispersed particles and the average particle diameter (D) of the pigment-dispersed particles.
Detailed Description
The process of completing the present invention is illustrated. The coating compositions disclosed in patent documents 1 and 2 are aqueous coating compositions, and the obtained coating films still do not have sufficient abrasion resistance and durability. Therefore, the coating composition disclosed in patent document 1 may have a large number of recoats due to abrasion, and thus the maintenance cost cannot be reduced.
Accordingly, the present inventors have aimed to develop a coating composition that can satisfy excellent abrasion resistance and durability. As a result of intensive studies, at least as a technical feature, there is provided a coating composition containing at least 1 pigment selected from the group consisting of carbonate, titanium oxide, zinc oxide, precipitated barium sulfate, talc, silica and kaolin, wherein the ratio (L/D) of the distance between the surfaces of the pigment-dispersed particles (L) to the average particle diameter (D) of the pigment-dispersed particles in a coating film containing the coating composition is 0.4 or more and 2.0 or less. The present inventors have found that a coating composition can form a coating film having excellent abrasion resistance and long service life, and have completed the present invention.
Further, the coating composition of the present disclosure can provide a coating composition having excellent two-component mixing properties, and the solvent-free main agent composition and the solvent-free curing agent contained in the coating composition can be sufficiently and uniformly mixed, so that the reaction can sufficiently proceed after the coating on a road surface, and a strong coating film can be formed.
The coating composition of the present invention will be explained below.
The coating composition of the present disclosure is a composition comprising
A solvent-free main agent composition and,
A coating composition of a solvent-free curing agent composition,
the solvent-free base composition comprises a coating film-forming resin, a pigment and an organometallic catalyst,
the coating film-forming resin contains at least 1 selected from the group consisting of a polyol and an aromatic polyfunctional amine,
the pigment contains at least 1 selected from carbonate, titanium oxide, zinc oxide, precipitated barium sulfate, talc, silica and kaolin,
the solvent-free curing agent composition contains at least 1 selected from the group consisting of an aliphatic polyfunctional isocyanate compound and an aromatic polyfunctional isocyanate compound,
the ratio (L/D) of the distance (L) between the surfaces of the pigment-dispersed particles and the average particle diameter (D) of the pigment-dispersed particles in a coating film containing the coating composition is 0.4 to 2.0.
Regarding the ratio (L/D) of the distance between the surfaces of the pigment-dispersed particles (L) to the average particle diameter of the pigment-dispersed particles (D)
The ratio (L/D) of the distance between the surfaces of the pigment-dispersed particles (L) and the average particle diameter (D) of the pigment-dispersed particles in a coating film containing the coating composition of the present disclosure is 0.4 or more and 2.0 or less.
The coating composition of the present disclosure having the compounding of the present disclosure and having the ratio (L/D) of the distance between the surfaces of the pigment-dispersed particles (L) to the average particle diameter of the pigment-dispersed particles (D) within such a numerical range can impart higher durability.
Further, the coating composition can be appropriately adjusted according to the coating conditions required, depending on the object to be coated, the coating conditions, and the like. For example, the viscosity can be prevented from becoming too high, and the two-component mixability of the solventless main agent composition and the solventless curing agent composition is excellent. If the two-component mixing property is excellent, the reaction proceeds sufficiently after the coating on the road surface, and a tough coating film can be formed.
Further, the coating film can be provided with toughness, excellent abrasion resistance and durability.
When the (L/D) is in the above range, for example, a coating film having high durability can be obtained in a mode using a pigment having a Mohs hardness of less than 5 and, in some modes, a Mohs hardness of 3 or less. Therefore, even if a hard pigment having a mohs hardness of 5 or more is not contained, a coating film having high durability can be obtained, and therefore, the material selection can be increased, and the production can be performed at low cost.
Further, when the (L/D) is in the above range, the coating film can have good black-and-white hiding property. Examples of pigments having a Mohs hardness of less than 5 include carbonates (calcium carbonate), zinc oxide, precipitated barium sulfate, talc and kaolin.
The coating composition of the present disclosure is contained, and the ratio (L/D) of the distance between the surfaces of the pigment-dispersed particles (L) to the average particle diameter of the pigment-dispersed particles (D) in the coating film is 0.4 to 2.0, for example, 0.45 to 1.95. As long as the (L/D) in the present disclosure is in the range of 0.4 to 2.0, the lower limit value and the upper limit value may be appropriately set within the range.
In one embodiment, (L/D) is 0.45 or more, for example, 0.5 or more, 0.65 or more, for example, 0.7 or more, and in another embodiment, 0.75 or more. By having such an (L/D) value, the coating film can have particularly good black-and-white hiding properties in addition to the above-described various effects.
On the other hand, the (L/D) is 1.95 or less, for example, 1.8 or less, and in one embodiment, 1.5 or less, for example, 1.0 or less, and may be 0.9 or less. In the present disclosure, it is sufficient to be within these numerical ranges. By having such an (L/D) value, the above-described various effects can be obtained.
In an embodiment, the (L/D) is 0.45 to 1.8, for example, 0.45 to 1.5.
Here, fig. 1 shows a schematic cross-sectional view of a coating film showing a relationship between the distance (L) between the surfaces of the pigment-dispersed particles and the average particle diameter (D) of the pigment-dispersed particles. Fig. 1 shows a mode in which pigment particles 2 are arranged in a simple cubic lattice ( takes a pure cubic lattice shape) in a coating film 1. In fig. 1, the diameter of the pigment is enlarged for the purpose of illustration.
In the present disclosure, the value of the ratio (L/D) of the distance (L) between the surfaces of the pigment-dispersed particles in the coating film to the average particle diameter (D) of the pigment-dispersed particles can be derived as follows.
The average particle diameter (D) of the pigment-dispersed particles is the volume average particle diameter (D50) of the pigment-dispersed particles, and can be measured, for example, by a particle size measuring apparatus such as a laser diffraction particle size distribution measuring apparatus SALD-2200 (manufactured by Shimadzu corporation).
The distance (L) between the surfaces of the pigment-dispersed particles can be determined by calculating the average dispersed particle diameter (D50) and the amount of the pigment mixed and the specific gravity, which are measured, assuming that the pigment-dispersed particles are arranged in a simple cubic lattice in the coating film.
In the present disclosure, various pigments may be mixed, and in addition, the pigments may be non-uniformly dispersed. In either mode, the average particle diameter (D) of the pigment-dispersed particles and the average distance (L) between the surfaces of the pigment-dispersed particles can be calculated by the above-described method or a known method. For example, the (L/D) value of a coating film having a dry coating film thickness of 200 μm can be calculated.
In one embodiment, the pigment of the present disclosure may be spherical, substantially spherical, granular, or the like, and is spherical or substantially spherical in order to maintain the strength of the coating film. By being spherical or substantially spherical, higher durability can be imparted. Further, a coating composition suitable for coating conditions required depending on the object to be coated, the coating conditions, and the like can be appropriately prepared, and the work efficiency can be improved.
The coating composition may contain a pigment having a spherical, substantially spherical, or granular shape and a pigment having a flat shape, or may contain a pigment having a flat shape alone, without departing from the scope of the present disclosure. In the mode of containing a flat pigment, (L/D) can be derived by a known method.
Solvent-free main agent composition
The solvent-free base composition contains a coating film-forming resin, a pigment and an organometallic catalyst.
The coating compositions of the present disclosure contain a solventless base composition and therefore no volatile components are contained in the base composition. Therefore, odor is not generated and the load on the environment can be reduced. The composition of the present disclosure is suitable for a coating composition for marking road surfaces because it has weather resistance superior to a coating composition containing a solvent such as an aqueous solvent or an organic solvent and can form a coating film having toughness.
Coating film forming resin
The coating film-forming resin of the present disclosure contains at least one selected from a polyol having 2 or more hydroxyl groups and an aromatic polyfunctional amine. In one embodiment, the coating film-forming resin contains at least one selected from the group consisting of a polyol having 2 or more hydroxyl groups and an aromatic diamine.
Polyols having more than 2 hydroxyl groups
The polyol is not particularly limited. In order to make the viscosity of the obtained coating composition easily usable as a solvent-free type, the number average molecular weight is, for example, 50 to 3,000, and in one embodiment, 50 to 1,000, for example, 500 to 1,000. Note that, in the present specification, the number average molecular weight is a polystyrene equivalent value based on Gel Permeation Chromatography (GPC).
For example, the hydroxyl value of the polyol is 50mgKOH/g or more and 2,000mgKOH/g or less. When the hydroxyl value is within such a range, a coating film having sufficient strength can be obtained. And a coating film having flexibility can be formed.
In one embodiment, the polyol has a hydroxyl value of from 50mgKOH/g to 1,500mgKOH/g, for example, from 50mgKOH/g to 500mgKOH/g, and in one embodiment, from 50mgKOH/g to 350 mgKOH/g.
In the present specification, the hydroxyl value represents the hydroxyl value of the solid content, and can be measured according to the specification of JIS K0070.
The polyol may contain at least 1 selected from polyether polyol, polyester polyol, acrylic polyol and castor oil polyol.
Further, polyether diol, polyester diol, polycarbonate diol and the like can be exemplified. Examples thereof include polyalkylene glycols such as polyethylene glycol, polypropylene glycol, polyethylene propylene glycol, polytetramethylene ether glycol, polyhexamethylene ether glycol and polyhexamethylene ether glycol, polyester glycols such as polyethylene adipate, polybutylene adipate, polyhexamethylene adipate, neopentyl glycol adipate, poly-3-methylpentyladipate, polyethylene adipate/butylene glycol and polyethylene adipate neopentyl glycol/hexyl adipate, polylactone glycols such as polycaprolactone glycol and poly-3-methylpentanediol, polycarbonate glycols such as polyhexamethylene carbonate glycol, castor oil-based polyols, modified products thereof, and mixtures thereof.
In one embodiment, the polyol is a castor oil-based polyol. The solventless main agent composition of the present invention contains a castor oil polyol, and thus a coating composition having a relatively low viscosity can be obtained. The castor oil-based polyol is not particularly limited, and examples thereof include castor oil and derivatives thereof, for example, diglycerides and monoglycerides of castor oil fatty acids, and mixtures thereof. By using the castor oil-based polyol, the solvent-free main agent composition and the solvent-free curing agent composition having low viscosity can be mixed, and these can be sufficiently mixed.
In one embodiment, the polyhydric alcohol may be a polyhydric alcohol such as ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, methylpentanediol, neopentyl glycol, polyethylene glycol, tetramethylene ether glycol, hexamethylene ether glycol, glycerol, pentaerythritol, dipentaerythritol, sorbitol, inositol, mannitol, glucose, fructose, or the like.
In one embodiment, the acrylic polyol is obtained by polymerizing a radically polymerizable unsaturated monomer composition. As the radical polymerizable unsaturated monomer, a mixture of a radical polymerizable unsaturated monomer containing a hydroxyl group necessary for obtaining the hydroxyl value and another monomer can be used. The hydroxyl group-containing radically polymerizable unsaturated monomer is not particularly limited, and examples thereof include 2-hydroxyethyl acrylate and 2-hydroxyethyl methacrylate, and these monomers may be used alone or in combination. The other radically polymerizable monomers are not particularly limited, and examples thereof include styrenes such as styrene and α -methylstyrene; acrylic esters such as methyl acrylate, ethyl acrylate, propyl acrylate, n-, iso-and t-butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate and the like; methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-, iso-and tert-butyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, and the like.
The acrylic polyol can be produced by conducting a polymerization reaction in the absence of a solvent or in the presence of an appropriate organic solvent and removing the solvent.
For example, as the polymerization initiator, an initiator known in the art as a radical polymerization initiator can be used. Examples of the polymerization initiator include organic peroxides such as benzoyl peroxide, t-butyl peroxide and cumene hydroperoxide, and organic azo compounds such as azobiscyanovaleric acid and azoisobutyronitrile.
The polymerization can be carried out at a temperature of 80 to 140 ℃ for 1 to 8 hours by procedures known to those skilled in the art. For example, the polymerization can be carried out by dropping a radical polymerizable monomer and a polymerization initiator in a heated organic solvent. The organic solvent used in the polymerization is not particularly limited, and an organic solvent having a boiling point of about 60 to 250 ℃ is preferable. Examples of the organic solvent to be used include water-insoluble organic solvents such as butyl acetate, xylene, toluene, methyl isobutyl ketone, propylene glycol, dipropylene glycol dimethyl ether, and methyl ether acetate; and water-soluble organic solvents such as tetrahydrofuran, ethanol, methanol, propanol, isopropanol, 2-butanol, t-butanol, dioxane, methyl ethyl ketone, ethylene glycol monobutyl ether, 2-methoxypropanol, 2-butoxypropanol, diethylene glycol monobutyl ether, diethylene glycol butyl ether (butyl diglycol), N-methylpyrrolidone, ethylene carbonate, and propylene carbonate.
Aromatic polyfunctional amines
The aromatic polyfunctional amine is an aromatic amine having 2 or more amino groups in one molecule, and is not particularly limited.
In one embodiment, the aromatic compound is an aromatic compound in which a hydrogen atom of an aromatic ring is substituted with 2 or more amino groups. Examples thereof include diaminotoluene (also referred to as phenylenediamine) and triaminobenzene. The aromatic polyfunctional amine may have at least 1 alkyl group selected from methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl on the aromatic ring.
In one embodiment, the aromatic polyfunctional amine includes diethyldiaminotoluene, 4 '-diamino-3, 3' -dichlorodiphenylmethane, 2, 4-diaminotoluene, 2, 6-diaminotoluene, 3, 4-diaminotoluene, 1-methyl-3, 5-diethyl-2, 4-diaminobenzene, 1-methyl-3, 5-diethyl-2, 6-diaminobenzene (both referred to as diethyltoluenediamine or DETDA), 4 '-diamino-3, 3' -diethyl-5, 5 '-dimethylphenylmethane (MEDDM), 1,3, 5-triethyl-2, 6-diaminobenzene, 4' -diaminodiphenylmethane, 3,5,3',5' -tetraethyl-4, 4' -diaminodiphenylmethane, 3, 5-dimethylthio-2, 4-toluenediamine, 3, 5-dimethylthio-2, 6-toluenediamine, and the like. These can be used alone, or more than 2 kinds can be used in combination.
In certain embodiments, the aromatic polyfunctional amine is diethyldiaminotoluene, 4 '-diamino-3, 3' -dichlorodiphenylmethane, and mixtures of these.
In one embodiment, the aromatic polyfunctional amine includes 1,3, 5-triaminobenzene, 1,2, 4-triaminobenzene, and the like. These can be used alone, or more than 2 kinds can be used in combination.
In one embodiment, the aromatic polyfunctional amine is diaminodiphenylmethane aromatic polyfunctional amine, phenylenediamine aromatic polyfunctional amine, bisaminophenylfluorene aromatic polyfunctional amine, diaminodiphenyl ether aromatic polyfunctional amine (for example, 4' -diaminodiphenyl ether), diaminonaphthalene aromatic polyfunctional amine, diaminobenzophenone aromatic polyfunctional amine, or the like.
The aromatic polyfunctional amine may have an amine value of, for example, 100 to 1,200mgKOH/g, or 200 to 800 mgKOH/g.
When the amine value is within such a range, a desired short-time curing is possible, and a strong coating film can be formed. Further, the coating composition can adjust the pot life of, for example, a coating composition for marking a road surface, a coating composition for coating an inner surface of an iron pipe, a coating composition for coating an outer surface of an iron pipe, and a coating composition for coating an inner surface and an outer surface of an iron pipe to a desired range, and therefore the coating composition is excellent in workability. In the present specification, the amine value represents a solid amine value, and can be measured according to the provisions of JIS K7237.
The coating film-forming resin contained in the solventless curing agent composition is a combination of 1 or 2 or more compounds selected from polyols and aromatic polyfunctional amines. Among them, polyhydric alcohols are preferable.
Examples of commercially available aromatic polyfunctional amines include diaminodiphenylmethane series (イハラキュアミン MT, キュアハード -MED, both available from クミアイ chemical corporation), phenylenediamine series (エタキュア 100, アルベマーレ co.), bisaminophenylfluorene series (BAFL, JFE ケミカル co.), diaminodiphenyl ether series (4,4' -diaminodiphenyl ether, JFE ケミカル co.), diaminonaphthalene series aromatic polyfunctional amines, and diaminobenzophenone series aromatic polyfunctional amines.
In the coating composition of the present invention, with respect to the solvent-free main agent composition and the solvent-free curing agent composition described later, the equivalent of NCO groups contained in the solvent-free curing agent composition, the equivalent of OH groups contained in the solvent-free main agent composition, and NH2The ratio of the equivalents of the radicals taken together [ NCO/(OH + NH)2)]Is 0.5 to 2.0, for example 0.7 to 1.7, and in one embodiment 0.8 to 1.6. In addition, [ NCO/(OH + NH)2)]May be 0.8 to 1.55.
By [ NCO/(OH + NH ]2)]In the above range, the curing of the coating film can be sufficiently progressed, a stronger coating film can be obtained, and the coating film can have excellent abrasion resistance and durability.
Pigment (I)
The pigment of the present invention contains at least 1 selected from the group consisting of carbonate, titanium oxide, zinc oxide, precipitated barium sulfate, talc, silica and kaolin. In addition, shell chalk, egg shell calcium, hollow particles, and the like may be used. For example, at least 1 kind selected from carbonates, titanium oxide and talc may be contained, and a plurality of kinds of carbonates may be contained.
By containing such a pigment, a coating film formed from the coating composition of the present invention can be white. For example, in one aspect, the coating composition for marking a road surface can be used for forming a white coating film, for example, a coating film of white line or the like.
In one embodiment, the pigment contains carbonate and titanium oxide, and may further contain at least 1 selected from zinc oxide, precipitated barium sulfate, talc, silica, and kaolin, as necessary. By containing such a combination of pigments, a coating film formed from the coating composition of the present invention can be rendered white. The above effects can be more effectively exhibited.
The carbonate is selected from calcium carbonate, magnesium carbonate, iron (II) carbonate, dolomite (CaMg (CO)3)2) At least 1 kind of (1). In certain forms, the carbonate is calcium carbonate. In a certain mode, the calcium carbonate contains at least 1 selected from the group consisting of heavy calcium carbonate and light calcium carbonate. Here, although not limited to a specific theory for explanation, the coating composition of the present invention contains at least 1 selected from the group consisting of heavy calcium carbonate and light calcium carbonate, and thus even if the mohs hardness is lower than that of other carbonates, the coating film formed from the coating composition not only satisfies excellent abrasion resistance and durability, but also the coating composition is easily dispersed during production.
In one embodiment, the pigment may contain at least 1 selected from the group consisting of a carbonate, titanium oxide, zinc oxide, precipitated barium sulfate, talc, silica and kaolin, and at least 1 selected from the group consisting of bentonite, smectite, glass flake (silica filler), iron oxide, acicular titanium oxide, quinophthalone, anthraquinone, benzimidazolone and bismuth vanadate, isoindoline pigments, isoindolinone pigments, carbon black, dioxazine pigments, indanthrone pigments, copper phthalocyanine chloride, copper phthalocyanine bromide, perylene pigments, diketopyrrolopyrrole pigments and azo pigments.
In one embodiment, the amount of carbonate is less than the amount of titanium oxide.
In one embodiment, the amount of the pigment is 5 to 55 parts by mass based on 100 parts by mass of the solid content of the coating composition. When the amount is within this range, a coating film having sufficient tinting strength can be formed, and the coating composition can be inhibited from increasing in viscosity and has excellent miscibility with a curing agent, so that the formation of a tough coating film is not inhibited. In the case where a plurality of pigments are used, the amounts of the pigments are the total.
In one embodiment, the amount of the carbonate such as calcium carbonate is 5 parts by mass or more and 55 parts by mass or less with respect to 100 parts by mass of the solid content of the coating composition, and is, for example, 10 parts by mass or more and 45 parts by mass or less with respect to 100 parts by mass of the solid content of the coating composition.
In one embodiment, the pigment comprises calcium carbonate, and in one embodiment, calcium carbonate and talc. The coating composition of the present disclosure containing calcium carbonate can exhibit more excellent abrasion resistance.
For example, when the coating composition contains both calcium carbonate and talc, the total amount of calcium carbonate and talc is 5 parts by mass or more and 55 parts by mass or less, in one embodiment 10 parts by mass or more and 30 parts by mass or less, for example 10 parts by mass or more and 20 parts by mass or less, with respect to 100 parts by mass of the solid content of the coating composition.
When the total amount of calcium carbonate and talc is within such a range, the coating composition can be inhibited from increasing in viscosity, and has excellent miscibility with a curing agent, and therefore, the formation of a tough coating film is not inhibited. In addition, the coating film may have excellent abrasion resistance.
When calcium carbonate and talc are contained in the coating composition together, the relationship between the amount of calcium carbonate and the amount of talc, [ calcium carbonate/(calcium carbonate + talc) ] =0.1 or more and less than 1.0, for example, 0.4 or more and 0.9 or less, for example, 0.5 or more and 0.9 or less. When the amount is within such a range, a coating film having excellent abrasion resistance can be formed.
In one embodiment, the pigment comprises calcium carbonate as a carbonate salt and talc, and the amount of the calcium carbonate and the amount of the talc have a relationship
[ calcium carbonate/(calcium carbonate + talc) ] =0.6 or more and 1.0 or less.
In this embodiment, the value can be appropriately selected from the above-described numerical range.
In certain embodiments, the amount of calcium carbonate is greater than the amount of talc. In this manner, [ calcium carbonate/(calcium carbonate + talc) ] is greater than 0.5 and less than 1.0. In the case where the amount of calcium carbonate is larger than that of talc, the durability may be higher.
On the other hand, depending on the purpose and application of use, a coating film having higher durability than a conventional coating composition is required, but a coating film having abrasion resistance slightly lower than that of a coating film obtained in a mode in which the amount of calcium carbonate is larger than that of talc may be sufficient. In such a case, the talc content may be made larger than the calcium carbonate content. In this embodiment, a coating film having longer durability than that of a coating film obtained from a known coating composition, for example, can also be formed. Note that in this mode, [ calcium carbonate/(calcium carbonate + talc) ] may be 0.1 or more and less than 0.5. It is noted that the amounts of calcium carbonate and talc are on a mass basis.
The aspect ratio of the pigment is, for example, 1:1 to 5:1, or, in one embodiment, 1:1 to 4:1, as the thickness. When the aspect ratio of the pigment is in this range, the ratio (L/D) of the distance between the surfaces of the pigment-dispersed particles (L) to the average particle diameter of the pigment-dispersed particles (D) can be set to L/D =0.4 or more and 2.0 or less. Further, the viscosity of the coating composition can be suppressed from becoming too high, and a stronger coating film can be formed. Further, a coating film having excellent black-and-white hiding properties can be formed in good balance.
In one embodiment, the average particle diameter (D) of the pigment dispersion particles is 0.2 to 50 μm, and in one embodiment 3 to 35 μm.
For example, the average particle diameter (D) of the dispersed particles of the pigment is 0.2 μm or more and 50 μm or less, and in one embodiment, 3 μm or more and 35 μm or less. When the average particle diameter of the dispersed particles of the pigment is in such a range, the ratio (L/D) of the distance (L) between the surfaces of the dispersed particles of the pigment to the average particle diameter (D) of the dispersed particles of the pigment can be 0.4 or more and 2.0 or less.
In one embodiment, for example, the pigment contains carbonate, and the average particle diameter (D) of the dispersed particles of the carbonate-containing pigment may be in the above numerical range, and the above-described effects can be exhibited.
Further, the viscosity of the coating composition can be suppressed from becoming too high, and a stronger coating film can be formed. Further, a coating film having excellent black-and-white hiding properties can be formed in good balance.
The average particle diameter (D) in the case where the coating composition contains a plurality of pigments is determined by measuring the average particle diameter (D50) of the pigment mixture, and this value is defined as the average particle diameter (D) of the pigment-dispersed particles. In addition, the specific gravity when the coating composition contains a plurality of pigments is a value obtained by converting the specific gravity and the blending ratio of each of the pigments.
Organometallic catalysts
The solventless base composition of the present invention contains an organometallic catalyst. The organometallic catalyst is not limited if it is a substance that can contribute to the curing of the solventless main agent composition of the present invention. For example, known substances can be used. In one embodiment, the organometallic catalyst may use ester compounds of tin, lead, bismuth, zinc, titanium, and the like. Specific examples thereof include dibutyltin dilaurate, bismuth tris (2-ethylhexanoate), lead octoate, and bismuth octoate. As organometallic catalysts, preference is given to tin esters and/or bismuth esters.
When a tin ester such as dibutyltin dilaurate is used as the organometallic catalyst, it is preferably contained in a proportion of 0.01 to 2% by mass based on the total amount of the solventless main agent composition. By adding such an amount, the reactivity of the coating composition can be adjusted to a desired range. For example, a solventless curing agent composition can improve the reactivity of a coating composition even if it is relatively low in reactivity as a curing agent. In addition, reactivity with water can be suppressed, and foaming of the coating composition can be suppressed. And the workability of the coating composition can be improved.
Dehydrating agent
The solventless base composition of the present invention may further contain, for example, a dehydrating agent. The inclusion of the dehydrating agent can suppress the generation of carbon dioxide by the reaction between the moisture adhering to the coating surface and a solvent-free curing agent composition described later, for example, an aliphatic polyfunctional isocyanate, and can also suppress the generation of irregularities or pores in the coating film. The dehydrating agent is not particularly limited, and known ones can be exemplified. Examples thereof include molecular sieves of synthetic zeolites, calcium sulfate, and calcium oxide. The amount of the dehydrating agent is, for example, 0.3 to 5 parts by mass based on 100 parts by mass of the solid content of the coating composition. When the amount is within this range, the water content which the coating composition may contain can be sufficiently removed, and foaming of the coating composition can be suppressed.
On the other hand, in a certain mode, the dehydrating agent may not be contained. The dehydrating agent may be absent if the moisture is not attached to the road surface or the moisture content is such that the reaction of the solventless main agent composition is not adversely affected. If the method is a method not including a dehydrating agent, the production steps can be shortened and the wear resistance can be excellent.
Solvent-free curing agent composition
The solvent-free curing agent composition contains at least 1 selected from the group consisting of an aliphatic polyfunctional isocyanate compound and an aromatic polyfunctional isocyanate compound.
The aliphatic polyfunctional isocyanate compound is not particularly limited, and examples thereof include hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, cyclohexane-1, 4-diisocyanate, dicyclohexylmethane-4, 4-diisocyanate, methylcyclohexane diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, and the like. Further, these may be modified products.
The aromatic polyfunctional isocyanate compound is not particularly limited, and examples thereof include tolylene diisocyanate, diphenylmethane diisocyanate (MDI), xylylene diisocyanate, and the like. Further, these may be modified products.
In one embodiment, the solventless curing agent composition contains an aliphatic polyfunctional isocyanate. The aliphatic polyfunctional isocyanate can suppress discoloration due to weather deterioration. For example, the aliphatic polyfunctional isocyanate is hexamethylene diisocyanate or a modified product thereof.
The aliphatic polyfunctional isocyanate and the aromatic polyfunctional isocyanate may be biuret, isocyanurate, allophanate or adduct thereof. The solventless curing agent composition may contain the aliphatic polyfunctional isocyanate compound alone or in combination of 2 or more.
In the coating composition of the present invention, the amount of the solvent-free curing agent composition can be appropriately adjusted so that the equivalent of NCO groups contained in the solvent-free curing agent composition, the equivalent of OH groups contained in the solvent-free base composition and NH groups are2The ratio of the total equivalent weight of the radicals being within a predetermined range, i.e., [ NCO/(OH + NH) ]2)]And =0.5 or more and 2.0 or less.
Additive agent
The coating composition of the present invention may contain, in addition to the above components, additives blended in the coating composition, such as aggregate (sand, etc.), silica, a reflecting material, a matting agent such as alumina, a surface conditioner, a viscosity conditioner, a preservative, an antifungal agent, an antifoaming agent, a dispersing agent, a light stabilizer, an ultraviolet absorber, wax, a dehydrating agent, a leveling agent, and an antioxidant. These additives may be contained in at least one of the solvent-free main agent composition and the solvent-free curing agent composition. The amounts of these may be appropriately adjusted within a range not impairing the effects of the present invention.
In one embodiment, the coating composition of the present invention is a coating composition selected from the group consisting of a coating composition for marking a road surface and a coating composition for heat insulation of a road surface. If necessary, a known heat insulating component may be contained.
In one embodiment, the coating composition of the present invention is a white coating composition for marking a road surface and/or a coating composition for insulating a road surface, and is used for, for example, white lines on a road surface.
Coating composition for coating iron pipe
In one embodiment, the coating composition of the present invention is at least 1 selected from the group consisting of a coating composition for coating an inner surface of an iron pipe, a coating composition for coating an outer surface of an iron pipe, and a coating composition for coating an inner surface and an outer surface of an iron pipe. The coating composition of the present invention has a viscosity excellent in coatability and excellent wear resistance of the obtained coating film, and therefore, as in the case of the mode in which the object to be coated is a road surface, it can be applied to an iron pipe, for example, a steel pipe, which requires less periodic maintenance.
Herein, the term "excellent wear resistance" in the present disclosure means that the wear amount of a coating film of a coating composition having a thickness of 200 μm in a wear resistance test according to JIS K5600-5-9 is smaller than that of a conventional road marking coating composition (210mg), and in one embodiment, 120mg or less, for example, 80mg or less, for example, 50mg or less, and in another embodiment, 45mg or less. For example, the abrasion loss may be 40mg or less, may be 38mg or less, and in one embodiment, may be 30mg or less.
On the other hand, the abrasion loss is 5mg or more, for example, 10mg or more in some embodiments.
The abrasion loss is, for example, 5mg to 120mg, for example, 5mg to 50mg, in one embodiment, 5mg to 45mg, for example, 5mg to 38 mg. In another embodiment, the amount may be 5mg to 30 mg. In the present disclosure, the wear amount may be referred to as a wear reduction amount.
Method for preparing coating composition
The method for preparing the coating composition of the present disclosure is not particularly limited, and a method of mixing and stirring the above-mentioned solvent-free main agent composition and solvent-free curing agent composition, and the like, and dispersing the additives and the like contained therein as necessary may be listed. The stirring method is not particularly limited, and a disperser or the like can be used. The dispersion method is not particularly limited, and a machine generally used for pigment dispersion, such as a roll mill, a paint shaker, a jar mill, a disperser, and a sand mill (サンドグラインドミル), can be used.
Coated article
The coating composition of the present disclosure may be applied to the surface of pavements such as road surfaces. The pavement is not particularly limited, and examples thereof include asphalt pavement and concrete pavement.
In addition, the coating composition of the present disclosure may be applied to the inner and outer surfaces of an iron pipe. In one embodiment, the iron pipe may be a pipe containing an iron component, such as a steel pipe.
Method for forming coating film
The coating film forming method of the present disclosure includes applying the coating composition of the present disclosure to a substrate, and curing the coated coating composition, and the application may be performed by at least 1 method selected from spray coating, a coating method using a static method, a coating method using a collision mixing method, slot coater coating, and flow coating.
In one aspect, the coating method of the coating composition of the present disclosure may be a two-component collision mixing spray coating in which two components of the solvent-free main agent composition and the solvent-free curing agent composition are collision mixed and sprayed. The two-component collision mixed spray coating preferably uses a high-pressure two-component collision mixed spray device. Further, the solvent-free main agent composition and the solvent-free curing agent composition may be mixed just before coating and coated using a coater such as a slit coater. Further, a method of continuously extruding a solvent-free main agent composition and a solvent-free curing agent composition in two components without air, a method of mixing them with a static mixer and continuously spraying them, and the like can also be used.
For example, the coating amount of the coating composition can be appropriately adjusted so that the film thickness after drying and curing becomes 50 μm or more and 2,000 μm or less.
The drying conditions are not particularly limited, and for example, drying at room temperature is possible. Forced drying may be performed by using an infrared heater, a burner, or the like depending on conditions such as air temperature and the temperature of the object to be coated.
In one embodiment, the coating composition of the present disclosure may be a room temperature curable coating composition.
Examples
The present invention will be described more specifically with reference to the following examples, but the present invention is not limited to these examples. In the examples, "part(s)" and "%" are based on mass unless otherwise specified.
(solvent-free base composition)
The composition contained in the solvent-free base composition is as follows.
Coating film-forming resin:
･ URIC-H368 (castor oil polyol, available from Ito oil Co., Ltd.; hydroxyl value of solid content: 195mgKOH/g, number average molecular weight: about 700)
･ URIC-H62 (Castor oil polyol, available from Ito oil Co., Ltd.; hydroxyl value of solid component: 260mgKOH/g, number average molecular weight: 450)
･ URIC-H73X (Castor oil polyol, available from Ito oil Co., Ltd.; hydroxyl value of solid content: 270mgKOH/g, number average molecular weight: about 450)
Aromatic polyfunctional amines:
･ エタキュア 100 (DETDA manufactured by アルベマーレ Co., Ltd.; solid amine value: 629mgKOH/g)
･ キュアハード -MED (product of クミアイ chemical Co., Ltd., MEDDM; solid amine value: 395mgKOH/g)
Organometallic catalysts: TVS チンロウ (dibutyl tin laurate (DBTL) manufactured by Ridonghua Kasei Co., Ltd.)
Dehydrating agent: ゼオラム A4 (zeolite available from east ソー Co., Ltd.)
Pigment:
･ titanium oxide: タイペーク CR-97 (from stone industries, Ltd.),
･ carbonate salt: スーパー 2000 (Calcium carbonate, manufactured by Calcium Corp.)
･ carbonate salt: サンライト SL2200 (calcium carbonate, bamboo chemical industry Co., Ltd.)
･ carbonate salt: flourishing chalk (calcium carbonate, mascot manufacture)
･ carbonate salt: ユニグロス 3000 (Calcium carbonate, manufactured by Calcium Corp.)
･ Talc: スーパー SSS (manufactured by Japan talc Co., Ltd.)
The solvent-free main agent composition having the above composition was compounded in the amount (parts by mass) shown in table 1. Subsequently, the components were mixed at 40 ℃ or lower and stirred by a dispersing machine to prepare a solvent-free base composition.
(solvent-free curing agent composition)
The composition contained in the solventless curing agent composition is as follows.
Solvent-free curing agent:
･ コロネート HXL (aliphatic isocyanate Compound; trimer of hexamethylene diisocyanate, manufactured by Toho ソー Co., Ltd., NCO content: 23.2% by mass)
･ VESTANAT H12-MDI (aliphatic isocyanate Compound; manufactured by エボニック Co., Ltd., methylenebis (4, 1-cyclohexylene) diisocyanate, NCO content: 31.9% by mass)
･ ミリオネート MR-200 (aromatic isocyanate Compound; product of Toho ソー, Polymeric MDI, NCO content: 31 mass%).
(example 1)
(coating and film formation of coating composition)
The solvent-free base composition and the solvent-free curing agent composition were mixed just before the test plate was produced so as to reach active hydrogen (OH + NH) in terms of functional group equivalent2) Coating composition was prepared at a ratio of NCO =1: 1.16. Next, the coating composition was applied to a coated article (electrogalvanized steel sheet: plating amount: 3 g/m) using a doctor blade2) The cured film thickness was set to 200 μm. The coating composition was dried and cured at 23 ℃ for 72 hours to obtain a test plate having a coating film.
(examples 2 to 22 and comparative examples 1 to 6)
A coating composition was prepared and a test panel was prepared in the same manner as in example 1, except that the kinds and/or amounts of the respective components were changed as described in table 1, table 2, table 3, or table 4 below.
In each table, "carbon cal" represents calcium carbonate.
The coating compositions and test boards prepared in the examples and comparative examples were used to conduct the evaluations described below. The evaluation results are shown in tables 1,2, 3 and 4 below.
The main compositions of the coating compositions used in comparative examples 4 to 6 are shown below.
･ ロードライン 7000 white: solvent-type acrylic resin-based paint for road marking, manufactured by japan ライナー co., and solvents include toluene and ethyl acetate. It was coated to a film thickness of 200 μm by the method of JIS K5600-8-4.
･ ロードライン マ ー キ ュ リ ー white: acrylic emulsion water-based paint for road marking manufactured by Japan ライナー. It was coated to a film thickness of 200 μm by the method of JIS K5600-8-4.
･ エバーライン white: a molten coating composition for road marking manufactured by Japan ライナー. The coating was carried out with a coater in accordance with JIS K5600-8-4.
(measurement of average particle diameter (D50) of pigment Dispersion particles)
The average particle diameter of the pigment-dispersed particles was measured using a laser diffraction particle diameter distribution measuring apparatus SALD-2200 (manufactured by Shimadzu corporation) by adjusting the coating composition to an appropriate measurement concentration with toluene (23 ℃).
Further, the distance (L) between the surfaces of the pigment-dispersed particles was calculated from the measured average particle diameter (D50), that is, the average particle diameter (D) and the amount of blending and the specific gravity of the pigment-dispersed particles.
The average particle diameter (D) in the case where the coating composition contains a plurality of pigments is determined by measuring the average particle diameter (D50) of the pigment mixture, and this value is taken as the average particle diameter (D) of the pigment-dispersed particles. In addition, the specific gravity when the coating composition contains a plurality of pigments is a value converted from the specific gravity and the blending ratio of each of the pigments.
(durability of coating film (abrasion resistance))
The durability of the coating film was evaluated in accordance with the method prescribed in JIS K5600-5-9 abrasion resistance (abrasion ring method). The abrasion reduction amount at 1,000 rotations under a load of 1kg and 60rpm was measured using a rotary abrasion tester (manufactured by Toyo Seiki Seisaku-Sho Ltd.) and CS-17 (manufactured by TABER Co., Ltd.) as an abrasion ring as a testing machine, and evaluated by the following criteria.
Abrasion reduction (mg) = test board mass before test-test board mass after test
Very good: less than 30mg
O: more than 30mg and 40mg or less
Δ ≈ Δ: more than 40mg and not more than 50mg
And (delta): more than 50mg and not more than 120mg
X: over 120 mg.
(Ma hardness (indentation hardness))
The Marshall hardness of the coating film was measured using FISCOPE HM2000XYp (Fisher Instrument Co., Ltd.; test load: 300mN/20 sec) and evaluated according to the following criteria.
◎：70N/mm2The above
○：60N/mm2Above and less than 70N/mm2
○△：50N/mm2Above and less than 60N/mm2
△：40N/mm2Above and less than 50N/mm2
X: less than 40N/mm2。
(two-component mixability)
The solvent-free main agent composition and the solvent-free curing agent composition were stirred at a rotation speed of 500rpm for 15 seconds by a disperser at the compounding amounts shown in Table 1, and were immediately applied to a substrate (electrogalvanized steel sheet) with a blade so that the dry film thickness was 200. mu.m. The state of the coating film after leaving at 23 ℃ for 1 day was evaluated according to the following criteria.
O: the coating film is not sticky when touched by fingers
X: the coating film was tacky (the solvent-free base composition and the solvent-free curing agent composition were not uniformly mixed).
(hidden in black and white (legibility))
The identifiability was evaluated according to method B (hiding rate test for lightly colored paint) specified in JIS K5600-4-1 visual characteristic hiding power of coating film.
The coating composition was applied to black-and-white hiding ratio test paper (manufactured by japan テストパネル) at room temperature using a 6mil applicator. The color tone was measured using a colorimeter CR-400 (manufactured by KONICA MINOLTA, INC.) and evaluated according to the following criteria.
O: the hiding rate is more than 98 percent
X: the hiding rate is less than 98 percent.
According to example 1, the coating composition has a predetermined composition of the present disclosure, and the ratio (L/D) of the distance between the surfaces of the pigment-dispersed particles (L) to the average particle diameter (D) of the pigment-dispersed particles in the coating film is within the scope of the present disclosure, whereby a coating film having excellent abrasion resistance (coating film durability), two-component mixing property, and black-and-white hiding property (visibility) can be formed.
According to examples 2, 7 to 9, 12 to 18 and 21 to 27, the coating film having the composition and (L/D) specified in the present disclosure was obtained by containing carbonate and titanium oxide as the pigment components, and thereby having more excellent abrasion resistance (coating film durability).
According to examples 3 to 5, 10 and 20, by having the predetermined composition and (L/D) of the present disclosure and containing carbonate, talc and titanium oxide as pigment components, a coating film excellent in abrasion resistance (coating film durability), two-component mixing property and black-and-white hiding property (visibility) can be formed.
According to example 6, a coating film having a predetermined composition (L/D) of the present disclosure and containing talc and titanium oxide as pigment components can be formed, which is excellent in abrasion resistance (coating film durability), two-component mixing property, and black-and-white hiding property (visibility).
According to examples 11 and 19, a coating film having a composition and (L/D) specified in the present disclosure and further excellent abrasion resistance (coating film durability) can be obtained in a mode in which a carbonate, talc, and titanium oxide are contained as pigment components.
Thus, examples 1 to 27 can form a coating film excellent in abrasion resistance (coating film durability), two-component mixing property, and black-and-white concealing property (visibility). Therefore, if the coating composition of the present disclosure is used, the accuracy of automatic driving can be further improved, for example, when the automatic driving of a vehicle is controlled based on information on a road surface marking coating film such as a white line. Further, the coating composition of the present disclosure can form a coating film having a long service life and can shorten the time required for forming the coating film.
On the other hand, in comparative examples 1 and 2, (L/D) is outside the range of the present disclosure, so that the two-component miscibility is poor, and the main agent composition and the curing agent composition cannot be homogeneously mixed after the coating composition is applied, and the coating film is sticky.
Comparative example 3 (L/D) is outside the range of the present disclosure, and therefore, has poor black-and-white hiding properties and poor visibility of the coating film.
Comparative examples 4 to 6 are all commercially available coating compositions, and at least do not have the predetermined composition of the present disclosure. These coating compositions have significantly higher abrasion loss than the coating films obtained in the examples of the present disclosure, and sufficient durability cannot be obtained.
Industrial applicability
The coating composition of the present invention can form a coating film having excellent abrasion resistance. The present invention can provide a coating composition having excellent two-component miscibility. The coating composition of the present invention can sufficiently mix the solvent-free main agent composition and the solvent-free curing agent composition contained in the coating composition, and thus can coat and cure the coating composition in a shorter time.
Description of the symbols
1 coating film
2 pigment particles
D average particle diameter of pigment Dispersion particles
L distance between surfaces of the pigment dispersion particles.
Claims (10)
1. A coating composition comprising a solvent-free base composition and a solvent-free curing agent composition,
the solvent-free base composition comprises a coating film-forming resin, a pigment and an organometallic catalyst,
the coating film-forming resin contains at least 1 selected from the group consisting of a polyol and an aromatic polyfunctional amine,
the pigment contains at least 1 selected from carbonate, titanium oxide, zinc oxide, precipitated barium sulfate, talc, silica and kaolin,
the solvent-free curing agent composition contains at least 1 selected from the group consisting of an aliphatic polyfunctional isocyanate compound and an aromatic polyfunctional isocyanate compound,
the ratio (L/D) of the distance (L) between the surfaces of the pigment-dispersed particles and the average particle diameter (D) of the pigment-dispersed particles in a coating film containing the coating composition is 0.4 to 2.0.
2. The coating composition according to claim 1, wherein the equivalent of NCO groups contained in the solvent-free curing agent composition to the equivalent of OH groups and NH contained in the solvent-free main agent composition2The ratio of the equivalents of the radicals taken together [ NCO/(OH + NH)2)]Is 0.5 to 2.0 inclusive.
3. The coating composition according to claim 1 or 2, wherein the amount of the pigment is 5 parts by mass or more and 55 parts by mass or less with respect to 100 parts by mass of solid components of the coating composition.
4. The coating composition according to any one of claims 1 to 3, wherein the pigment dispersion particles of the pigment have an average particle diameter (D) of 0.2 μm or more and 50 μm or less.
5. The coating composition according to any one of claims 1 to 4, wherein the carbonate is calcium carbonate.
6. The coating composition according to claim 5, wherein the amount of the calcium carbonate is 5 to 55 parts by mass based on 100 parts by mass of the solid content of the coating composition.
7. The coating composition according to any one of claims 1 to 6, which is a coating composition for pavement marking and/or a coating composition for thermal insulation of a pavement.
8. The coating composition according to any one of claims 1 to 6, which is at least 1 selected from the group consisting of a coating composition for coating an inner surface of an iron pipe, a coating composition for coating an outer surface of an iron pipe, and a coating composition for coating an inner surface and an outer surface of an iron pipe.
9. The coating composition according to any one of claims 1 to 7, wherein a coating film of the coating composition having a thickness of 200 μm has an abrasion amount of 120mg or less in an abrasion resistance test according to JIS K5600-5-9.
10. A method for forming a coating film, which comprises applying the coating composition according to any one of claims 1 to 9 to a substrate,
The aforementioned coated coating composition is cured,
the aforementioned coating is performed by at least 1 method selected from the group consisting of spray coating, slot coater coating, and flow coating.
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| JP2018117243A JP6517407B1 (en) | 2018-06-20 | 2018-06-20 | Coating composition and method of forming coating film |
| JP2018-117243 | 2018-06-20 | ||
| PCT/JP2019/024589 WO2019244996A1 (en) | 2018-06-20 | 2019-06-20 | Coating composition and method for forming coating film |
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| CN112313299A true CN112313299A (en) | 2021-02-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5865772A (en) * | 1981-10-14 | 1983-04-19 | Hitachi Chem Co Ltd | Marking material |
| CN1968982A (en) * | 2004-06-17 | 2007-05-23 | 3M创新有限公司 | Pavement marking comprising modified isocyanate |
| JP2010051897A (en) * | 2008-08-28 | 2010-03-11 | Nippon Paint Co Ltd | Anti-corrosion method of cast iron pipe and cast iron pipe treated according to the same |
| CN104371484A (en) * | 2013-08-13 | 2015-02-25 | 关西涂料株式会社 | Coating composition and coating construction method using the same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6126676A (en) * | 1984-07-16 | 1986-02-05 | Dainippon Toryo Co Ltd | Urethane resin coating material composition |
| JPS61145258A (en) * | 1984-12-18 | 1986-07-02 | Dainippon Toryo Co Ltd | Urethane resin paint composition |
| JPS6395216A (en) * | 1986-10-11 | 1988-04-26 | Kurimoto Iron Works Ltd | Iron pipe coated with solventless two-pack type urethane coating material composition |
| JP6047256B1 (en) * | 2016-06-28 | 2016-12-21 | 大日本塗料株式会社 | How to paint the road |
| JP6517407B1 (en) * | 2018-06-20 | 2019-05-22 | 日本ペイント・インダストリアルコ−ティングス株式会社 | Coating composition and method of forming coating film |
-
2018
- 2018-06-20 JP JP2018117243A patent/JP6517407B1/en active Active
-
2019
- 2019-06-20 CN CN201980041440.2A patent/CN112313299A/en active Pending
- 2019-06-20 WO PCT/JP2019/024589 patent/WO2019244996A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5865772A (en) * | 1981-10-14 | 1983-04-19 | Hitachi Chem Co Ltd | Marking material |
| CN1968982A (en) * | 2004-06-17 | 2007-05-23 | 3M创新有限公司 | Pavement marking comprising modified isocyanate |
| JP2010051897A (en) * | 2008-08-28 | 2010-03-11 | Nippon Paint Co Ltd | Anti-corrosion method of cast iron pipe and cast iron pipe treated according to the same |
| CN104371484A (en) * | 2013-08-13 | 2015-02-25 | 关西涂料株式会社 | Coating composition and coating construction method using the same |
Non-Patent Citations (1)
| Title |
|---|
| 徐至钧: "《管道工程设计与施工手册》", 31 March 2005, 中国石化出版社 * |
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| Publication number | Publication date |
|---|---|
| JP2019218486A (en) | 2019-12-26 |
| JP6517407B1 (en) | 2019-05-22 |
| WO2019244996A1 (en) | 2019-12-26 |
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