JP3175322U - Powder coating container - Google Patents

Abstract

Disclosed is a powder coating container capable of easily carrying out multi-color and small-volume production even when a powder coating is used.
It has a capacity of 100 to 2000 ml and contains at least one powder paint. The filling rate of the powder coating is 70 to 90% by volume, and a part of the container is transparent.
[Selection] Figure 1

Description

  The present invention relates to a relatively small-capacity container filled with a powder paint.

  Powder coatings are widely used in general metal coatings as environmentally friendly coatings that do not discharge organic solvents into the atmosphere during coating. Among these, thermosetting powder coatings have been recognized for their excellent coating film performance and have been applied to various applications.

  Powder coating is used for electrostatic powder coating using various methods such as electrostatic spray coating, electrostatic fluid immersion method, electric field cloud method, etc. It is presupposed that the large container is filled with a unit of several tens to several hundred kg.

    The powder coating is prepared by adding a colorant that has been adjusted to the target color into the resin that is the basis of the powder, and then melt-kneading the resin to a predetermined color. Manufactured. This manufacturing method is suitable for so-called large lot painting that consumes a large amount of paint of the same color, such as home appliances, but in the case of small lot painting that requires small amounts of multicolor paint, It is not an efficient manufacturing method.

  Therefore, for the production of small amounts of multi-colors, Japanese Patent Application Laid-Open No. 9-262536 discloses powder coating materials of so-called three primary colors of yellow (Y), magenta (M) and cyan (C) and black (K). A powder coating method has been proposed in which a predetermined amount thereof is adhered to an object to be coated and baked.

JP-A-9-262536

  However, in the method described in Japanese Patent Laid-Open No. 9-262536, a booth that performs coating for each color is required, and the manufacturing process is complicated. Further, since the method described in JP-A-9-262536 is basically over-coating, the target color cannot be expressed if the amount of the powder paint of each color is wrong.

  An object of the present invention is to provide a new means that makes it possible to easily carry out multi-color and small-volume production even when a powder coating is used.

  The object of the present invention is achieved by a powder coating container having a capacity of 100 to 2000 ml and containing at least one powder coating.

 The filling rate of the powder paint is preferably 70 to 90% by volume.

 It is preferable that at least a part of the container is transparent.

 The container is preferably made of at least one resin.

 The resin is preferably polyethylene terephthalate.

  The powder coating container of the present invention has a relatively small volume of 100 to 2000 ml and contains a small amount of powder coating, so that it is easy to prepare the powder coating. For example, the powder coating material can be easily manufactured by taking out the powder coating material from a plurality of containers of the present invention filled with powder coating materials of various colors and mixing them appropriately.

  When the filling rate of the powder coating material in the container of the present invention is 70 to 90% by volume, the powder coating material can flow well in the container. For example, the powder coating material in the container is agitated during the transportation operation. Or by intentionally rocking the container, the powder coating in the container can be kept uniform.

  When at least a part of the container of the present invention is transparent, the color and filling rate of the powder paint can be discriminated from the outside, so there is no need to display the contents on the container surface.

  When the container of the present invention is made of at least one resin, the weight of the container can be reduced, and the impact resistance of the container can be improved. In particular, when the resin is polyethylene terephthalate, the container can be made light in weight, and sufficient strength and impact resistance can be imparted.

FIG. 1 shows a cross-sectional view of a container according to an embodiment of the present invention.

  The powder paint in the present invention is a powder paint that contains a thermosetting resin, a pigment, a curing agent, and the like as components, and does not substantially contain a solvent such as water or an organic solvent. Here, the solvent means a liquid which is liquid at room temperature and has volatility, but the kind thereof is not particularly limited. Specific examples of the solvent include water, alcohol, hydrocarbon, halogenated hydrocarbon, and volatile silicone. The powder coating is used as an industrial coating for beautification or protection in the same manner as a normal liquid coating. Since the powder coating material does not substantially contain a solvent, a relatively large amount of the solvent does not volatilize and pollute the surrounding environment.

  Thermosetting resins used for powder coatings have the property of fluidizing by heating, and the fluidizing temperature (melting temperature) is usually about 30 to 150 ° C. Therefore, the kneading temperature at the time of producing the powder coating material is appropriately selected from the above range according to the type of the thermosetting resin. In addition, if it is less than 30 degreeC, there exists a possibility that it may fluidize at room temperature and workability | operativity may deteriorate, and since there exists a possibility that a thermosetting resin may bridge | crosslink partially when heating temperature is high on the conditions where a hardening | curing agent exists. The fluidization temperature (melting temperature) of the thermosetting resin is preferably 30 to 130 ° C, more preferably 40 to 100 ° C.

  The thermosetting resin is not particularly limited, and examples thereof include epoxy resins, polyester resins, acrylic resins, fluorine resins, and silicone resins. In particular, those having a functional group having reactivity with the curing agent described later are preferred. Examples of the reactive functional group include a hydroxyl group, a carboxyl group, an epoxy group, an isocyanate group, an amide group, an amino group, and an acid anhydride group. In addition, hybrid resins in which these resins are mixed, such as epoxy / polyester hybrid resins, epoxy / acrylic hybrid resins, polyester / acrylic hybrid resins, fluorine / polyester resins, fluorine / acrylic resins, are used. Also good.

  The thermosetting polyester resin can be produced by polycondensing these components using, as raw materials, an acid component mainly composed of a polyvalent carboxylic acid and an alcohol component mainly composed of a polyhydric alcohol. The acid component is not particularly limited. For example, aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, phthalic acid, and anhydrides thereof; succinic acid, adipic acid, azelaic acid, sebacic acid, 1,4- Mention may be made of aliphatic carboxylic acids such as dicyclohexanedicarboxylic acid. Also, the alcohol component is not particularly limited. For example, aliphatic glycols such as ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,2-propanediol, and neopentyl glycol. And trivalent or higher polyhydric alcohols such as trimethylolpropane, glycerin, and pentaerythritol can be exemplified.

  Examples of thermosetting acrylic resins include hydroxyl group-containing ethylenically unsaturated monomers such as 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxyethyl (meth) acrylate; glycidyl acrylate, glycidyl methacrylate Epoxy group-containing unsaturated monomers such as 2-methylglycidyl methacrylate; amino group-containing unsaturated monomers such as dimethylaminoethyl (meth) acrylate and diethylaminoethyl (meth) acrylate; (meth) acrylamide, N-methyl (meth) acrylamide And homopolymers or copolymers such as acrylamide unsaturated monomers such as N-methylacrylamide; carboxylic acid group-containing unsaturated monomers such as (meth) acrylic acid.

  Thermosetting epoxy resins include glycidyl ester resins, glycidyl ether resins such as condensation reaction products of bisphenol A and epichlorohydrin and condensation reaction products of bisphenol F and epichlorohydrin, aliphatic epoxy resins, phenol / novolac type epoxies. Examples thereof include a resin and a cresol / novolak type epoxy resin.

  The ratio of the thermosetting resin in the powder coating material is not particularly limited. For example, 40 to 99% by weight, preferably 50 to 90% by weight, and more preferably 60 to 80% by weight of the whole powder coating material. % Can be accounted for.

  As the curing agent, those usually used for thermosetting powder coatings can be used, and as the curing agent when the reactive functional group of the thermosetting resin is a hydroxyl group, an aliphatic polyvalent carboxylic acid, An amino resin, a blocked isocyanate compound, a glycol urea curing agent, or the like is used. Aliphatic polycarboxylic acids include adipic acid, sebacic acid, suberic acid, succinic acid, glutaric acid, maleic acid, fumaric acid, dodecanedioic acid, pimelic acid, azelaic acid, itaconic acid, citraconic acid and their anhydrides Can be illustrated. Examples of amino resins include hexamethoxymelamine resins and hexaethoxymelamine resins. Examples of the blocked isocyanate compound include isophorone diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, tolylene diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated tolylene diisocyanate and the like, aliphatic, cycloaliphatic or aromatic isocyanates as phenols, ε- Examples thereof include those blocked with caprolactams, alcohols and the like.

  When the reactive functional group of the thermosetting resin is a carboxyl group, examples of the curing agent include an epoxy resin, a polyepoxy compound, a polyhydroxy compound, and a β-hydroxyalkylamide compound. Examples of the polyepoxy compound include triglycidyl isocyanurate, homo- or copolymers of glycidyl (meth) acrylate, and the like. Examples of the polyhydroxy compound include trimethylolpropane, sorbitol, tris (2-hydroxyethyl) isocyanurate, and the like. Examples of the β-hydroxyalkylamide compound include β-hydroxyethylpropylamide.

  As the curing agent when the reactive functional group of the thermosetting resin is an epoxy group, in addition to the above aliphatic polyvalent carboxylic acid, an amine curing agent such as dicyandiamide, a hydrazine curing agent, a carboxyl group-containing polyester resin, etc. Can be illustrated.

  The proportion of the curing agent in the powder coating is not particularly limited, but for example, 0.1 to 20% by weight, preferably 1 to 10% by weight, more preferably 2 to 50% by weight of the entire powder coating. % Can be accounted for.

  Note that a hybrid thermosetting powder coating using a plurality of thermosetting resins having reactive functional groups, for example, an epoxy / polyester comprising an epoxy resin having a glycidyl ether group and a polyester resin having a carboxyl group Hybrid powder coatings, and acrylic / polyester hybrid powder coatings consisting of acrylic resins with glycidyl groups and polyester resins with carboxyl groups, are in a relationship between the base resin and the curing agent. Therefore, any one of the resins may be regarded as a “thermosetting resin” and the other resin may be regarded as a “curing agent” to be a powder coating material.

  As the pigment, those generally used for thermosetting powder coatings can be used, and for example, any of color pigments, extender pigments, dyes or mixtures thereof can be used. .

  As the color pigment, it is possible to use both inorganic color pigments and organic color pigments. Examples of inorganic color pigments include titanium dioxide, zinc oxide, red iron oxide, yellow iron oxide, black iron oxide, and carbon black. , Ultramarine, Prussian blue, cobalt blue, cadmium red, red lead, mercury cadmium sulfide, manganese purple, reddish yellow lead, molybdenum orange, ocher, yellow lead, cadmium yellow, antimony yellow and the like.

  Examples of the organic coloring pigment include C.I. I. Pigment blue 15, C.I. I. Pigment blue 16, C.I. I. Phthalocyanine pigments such as C.I. Pigment Blue 17; I. Quinacridone pigments such as CI Pigment Red 122; I. Pigment yellow 93, C.I. I. Pigment yellow 94, C.I. I. Azo pigments such as CI Pigment Yellow 95; I. CI indoline pigments such as CI Pigment Yellow 109; I. Benzimidazolone pigments such as CI Pigment Yellow 154; I. And naphthol pigments such as CI Pigment Red 170.

  Various colors can be adopted as the color of the color pigment, but it is sufficient to prepare yellow, magenta, cyan, black, and white as basic colors. Examples of yellow include azo pigments such as disazo yellow, and iron yellow. As magenta, C.I. I. Pigment Red and Bengala. Examples of cyan include copper phthalocyanine and cyanine blue. Examples of black include carbon black and black iron oxide. Examples of white include titanium oxide and zinc oxide.

  Examples of the dye include nigrosine dye and aniline dye.

  In addition, pearl pigments such as bismuth oxychloride and titanium dioxide-coated mica; flakes and powders of metals such as zinc, iron, and copper; and those subjected to surface treatment; various metallic pigments; etc. are used as pigments. It is also possible.

  Examples of extender pigments include talc, silica, calcium carbonate, precipitated barium sulfate, aluminum hydroxide, and magnesium carbonate.

  Other additives for powder coatings (excluding pigments and curing agents) include surface conditioners, smoothing agents, curing catalysts, UV absorbers, foam inhibitors (usually used in thermosetting powder coatings) Anti-waxing agents), charge control agents, fluidity-imparting agents, flow agents, and the like. Examples of the surface conditioner include dimethylpolysiloxane and methylphenylpolysiloxane. A smoothing agent is for improving the fluidity | liquidity at the time of heat-melting of a powder coating material, and making a coating film smoother, for example, acronal 4F (made by BASF) can be mentioned. Examples of the curing catalyst include organic tin compounds such as dibutyltin dioxide. Examples of the antifoaming agent include benzoin compounds. Examples of ultraviolet absorbers include benzotriazole compounds. The charge control agent increases and stabilizes the amount of charge when the powder coating is used for electrostatic coating or electrostatic fluid immersion, and is controlled according to the charging characteristics of the powder coating. Either a charge control agent or a negative charge control agent is used. Examples of the positive charge control agent include higher fatty acid metal salts, alkoxylated amines, quaternized ammonium salts, and the like. Examples of the negative charge control agent include chlorinated polyester and aromatic oxycarboxylic acid. Examples of the fluidity-imparting agent include silica such as titanium dioxide and AEROSIL 200 (manufactured by Nippon Aerosil Co., Ltd.). In addition, since a fluidity | liquidity imparting agent has the objective of providing fluidity | liquidity to powder and improving a blocking resistance, it is preferable to add at a grinding | pulverization process. In addition, additives such as antioxidants and plasticizers that are generally used may be used as necessary.

  The proportion of pigments, curing agents, or other additives (excluding pigments and curing agents) in the powder coating is appropriate depending on the required coating performance such as concealment and smoothness of the powder coating. You can choose. The specific blending amount varies depending on the types of pigments, curing agents and other additives, but is usually 0.01 to 40% by weight, preferably 0.1 to 30% by weight, based on the whole powder coating material, More preferably, it is 1 to 20% by weight.

  Generally, a powder coating material is manufactured through a coarse pulverization step, a fine pulverization step, and a classification step after melt-kneading a mixture of components such as the thermosetting resin, pigment, and curing agent as described above.

  FIG. 1 is a cross-sectional view of a powder paint filling container according to an embodiment of the present invention. The container 1 of the present invention has a capacity of 100 to 2000 ml, preferably 150 to 1500 ml, more preferably 200 to 1000 ml, and still more preferably 250 to 500 ml, and the inside thereof is filled with the powder paint 2. . The container 1 includes a discharge port 1a, and the discharge port 1a is sealed by a cap 3.

  The filling rate of the powder coating material 2 in the container 1 is arbitrary. For example, the inside of the container 1 may be completely filled with the powder coating material 2. However, in terms of workability of filling the powder coating material 2, it is preferable that the container 1 is not completely filled with the powder coating material 2, for example, a filling rate of 50 to 95% by volume is preferable. In particular, a filling rate of 70 to 90% by volume is preferable. In this case, the powder coating can flow well in the container. For example, the powder coating in the container is agitated during the transportation operation, and the powder coating Quality can be maintained uniformly.

  Although the material of the container 1 is not limited, For example, it can be set as organic materials, such as inorganic materials, such as a metal and glass, and a thermosetting resin, a thermoplastic resin, and these composite materials. At least a part of the container 1 is made of a transparent member such as glass or resin, and is preferably transparent. In this case, since the color and filling rate of the powder paint can be discriminated from the outside, it is not necessary to attach a label or the like describing the contents on the outer surface of the container 1, and the manufacturing can be simplified.

  In terms of weight reduction and impact resistance, the container 1 is preferably made of resin rather than glass. The kind of resin is not specifically limited, Arbitrary thermosetting resins and thermoplastic resins can be used. A thermoplastic resin is preferable in terms of processability. A single type of resin may be used, or two or more types may be used in combination.

  Examples of the thermosetting resin include phenol resin, epoxy resin, unsaturated polyester resin, alkyd resin, urea resin, melamine resin, polyurethane, silicon resin, and the like.

  Examples of the thermoplastic resin include polyethylene, polypropylene, polystyrene, polyvinyl acetate, polyacrylate, polyacrylic acid, polyacrylamide, polyether, polyvinyl chloride, polyvinylidene chloride, polyacrylonitrile, fluororesin, polycarbonate, polyethylene terephthalate. Examples thereof include polyester such as tarate (PET), polyamide, polyimide, polyamideimide, polysulfone, ABS resin, and synthetic rubber. It is preferable that the thermoplastic resin is polyethylene terephthalate from the viewpoint that the container 1 is lightweight and can provide sufficient strength and impact resistance.

  The powder coating container of one embodiment of the present invention shown in FIG. 1 is such that an empty container 1 is filled with a powder coating 2 at a predetermined filling rate via a discharge port 1 a and sealed with a cap 3. Can be manufactured easily.

  The powder paint filling container of the present invention is excellent in usability because the capacity of the powder paint to be filled is limited to 100 to 2000 ml, and the weight is relatively small. It is. Also, a desired amount of powder coating material can be easily obtained by taking out a predetermined amount of powder coating material from a plurality of containers of the present invention containing powder coating materials of different colors and mixing them appropriately.

  The powder coating container of the present invention is excellent in usability, and can be suitably used particularly for powder coating for multicolor and small volume production.

    1 container, 2 powder paint, 3 cap

Claims (5)

A powder coating container having a capacity of 100 to 2000 ml and containing at least one powder coating. The powder coating material filling container according to claim 1, wherein the filling rate of the powder coating material is 70 to 90% by volume. The powder paint filling container according to claim 1 or 2, wherein at least a part thereof is transparent. The powder coating material filling container according to any one of claims 1 to 3, comprising at least one kind of resin. The powder coating container according to claim 4, wherein the resin is polyethylene terephthalate.

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