KR100796350B1 - Coating composition with photochromic effects and method for coating by thereof - Google Patents

Abstract

The present invention relates to a coating composition, more specifically, to the coating composition, characterized in that it is suitable for coating cell phones, MP3 players, PDA and other plastic extrusion and injection products and metal products, and also has an optical effect, the coating composition It relates to a coating method and a product coated with the coating composition.

The coating composition and the coating method of the present invention are particularly suitable for coating cell phones, MP3 players and other plastic extrusion and injection products and metal products, and because they prevent oxidation of metals and have chemical resistance and water resistance, the coating composition and Products coated by the coating method can implement a variety of colors and designs, can measure the amount of ultraviolet rays, and the quality of the high quality is possible to form a variety of consumption layer has an excellent effect.

Description

Coating composition, method of coating with the coating composition and products coated with the coating composition {COATING COMPOSITION WITH PHOTOCHROMIC EFFECTS AND METHOD FOR COATING BY THEREOF}

The present invention relates to a coating composition, more specifically, to the coating composition, characterized in that it is suitable for coating cell phones, MP3 players, PDAs, other plastic extrusion and injection products and metal products as well as having an optical effect. It relates to a coating method and a product coated with the coating composition.

In general, various coating compositions are known that are used in coating systems for decorating metals or plastics. These coating compositions essentially used a system based on organic solvents (solvent-containing), which have increased environmental concerns for the use of volatile organic solvents and, due to the increased cost of such organic solvents, Recent research efforts have focused on the development of water-containing coating systems. For example, Korean Patent Application No. 1990-010236 relates to silylalkyl or silylaryl isocyanates and alcohols, amines, polyether alcohols or amine-terminated polyethers to improve the dispersibility of mica particulates in aqueous-based coating compositions. A coating composition comprising urethane or urea, the reaction product of which is a reaction product, comprising mica-like microparticles surface-modified by reaction with these compounds, and coated articles, which are known in the art. Because it does not focus on the optical effect of the product at all, it is not possible to realize various colors, and it can be applied to the coating of mobile phones, MP3, PDA, other plastic extrusion and injection products and metal products in such a way that eco-friendly quality can be realized. None applied.

On the other hand, Korean Patent Application No. 1996-0703355 contains a polymeric resin binder, an optically variable thin dichroic pigment flake, and an interference mica pigment having an interference color similar to the color of one of the dichroic colors of the optically variable thin film pigment. The flake is characterized by having a multilayer thin film interference structure comprising a metal reflective layer having first and second parallel planes and at least one transparent dielectric layer located above at least one of the first and second planes. Compositions are disclosed wherein the optically variable thin dichroic pigment flakes are mainly used in inks used in anti-counterfeiting applications, generally in coating compositions, and these pigments are dichroisms not observed in other types of pigments. Impressive visual effects, including effects, but many of these pigments In the case of being so impressive, not only is there a problem that is not suitable for use in a commercial coating composition, the patent is also not possible to implement a variety of colors, and in a way that can be implemented in a high-quality environment, quality of the mobile phone, MP3, accessories, It cannot be applied to coating of other plastic extrusion and injection products and metal products.

Therefore, it is possible to realize various colors without such problems, and to be applied to coatings of cellular phones, MP3 players, PDAs, accessories, other plastic extrusions, injection products, and metal products in such a way that eco-friendly quality can be realized. There is a large need in the art for compositions.

In order to solve the above problems, the present invention has an optical effect that changes the color according to the amount of light, so that not only the amount of ultraviolet light can be grasped, but also a coating composition capable of producing various colors and a method of coating with the coating composition and It is an object to provide a product coated with the coating composition.

It is another object of the present invention to provide a coating composition which prevents oxidation of metals and has chemical resistance and water resistance, a method of coating with the coating composition, and a product coated with the coating composition.

In addition, the present invention is a coating composition that can be applied to the coating of mobile phones, MP3 players, accessories, other plastic extrusion and injection products and metal products as well as the implementation of a variety of colors as well as the environmentally friendly implementation of quality enhancement It is an object of the present invention to provide a method for coating with a coating composition and a product coated with the coating composition.

In order to achieve the above object, the present invention provides a coating composition, characterized in that the mixture of 50 to 200 parts by weight of the diluent per 100 parts by weight of the resin composition, and then 0.05 to 4 parts by weight of the photocompatible compound.

The diluent is characterized in that 40 to 60% toluene, 15 to 25% methyl isobutyl ketone, 10 to 20% ethyl acetate, 5 to 15% cyclohexanone.

The coating composition is characterized in that it further comprises one or more of antioxidants, light stabilizers, methylene chloride, chloroform, and methyl ethyl ketone.

The coating composition is 0.001-0.04 parts by weight of the antioxidant, 0.001-0.1 parts by weight of the light stabilizer, 2-4 parts by weight of the methylene chloride, 4-6 parts by weight of the chloroform, per 100 parts by weight of the resin composition Methyl ethyl ketone is characterized in that it is included in 1-3 parts by weight.

The resin composition is 10 to 20% by weight of synthetic resin, 5 to 10% by weight of metal powder pigment, 15 to 20% by weight of toluene, 10 to 15% by weight of methyl isobutyl ketone, 15 to 25% by weight of methyl acetate, 10 to n-butyl acetate. 20 wt%, 5-15 wt% of cellosolve acetate, characterized in that it comprises.

The resin composition is 20 to 40% by weight of polyester melamine synthetic resin, 1 to 20% by weight of metal powder pigment, 1 to 10% by weight of reactive monomer, 1 to 10% by weight of butyl glycol acetate, 1 to 10% by weight of n-butyl acetate, ethylene It is characterized in that it comprises 1 to 10% by weight of glycol monoethyl ester acetate, 10 to 30% by weight of xylene, 1 to 10% by weight of heptane, and 1 to 10% by weight of methyl alcohol.

In another aspect, the present invention provides a coating composition, characterized in that blending 0.05-4 parts by weight of the photo-compatible compound per 100 parts by weight of the resin composition.

The coating composition is characterized in that it further comprises one or more of antioxidants, light stabilizers, methylene chloride, chloroform, methyl ethyl ketone, and xylene.

The antioxidant is 0.001-0.04 parts by weight, the light stabilizer is 0.001- 0.1 parts by weight, the methylene chloride is 2-4 parts by weight, the chloroform is 4-6 parts by weight, the methyl ethyl ketone per 100 parts by weight of the resin composition It is characterized by being included in 1-3 parts by weight.

The resin composition is 20 to 30% by weight of synthetic resin, 20 to 30% by weight of reactive monomer, 3 to 8% by weight of quencher, 10 to 15% by weight of toluene, 5 to 10% by weight of ethyl acetate, 5 to 10% by weight of xylene, methyl iso 5 to 10% by weight of butyl ketone, 5 to 10% by weight of ethyl cellosolve, and 2 to 5% by weight of photoinitiator.

The resin composition is 30 to 35% by weight synthetic resin, 30 to 35% by weight reactive monomer, 10 to 15% by weight toluene, 20 to 25% by weight ethyl acetate, 10 to 15% by weight methyl isobutyl ketone, 5 to 10 ethyl cellosolve It is characterized by comprising a weight%, isopropyl alcohol 5-10% by weight, photoinitiator 2-5% by weight.

The resin composition is composed of a main body (40-50% by weight of urethane resin, 20-40% by weight of xylene, 20-40% by weight of n-butyl acetate, 1-10% by weight of butyl cellosolve acetate) and a curing agent (hexamethylene diisocyanate 30-). 70% by weight, 10-40% by weight of n-butyl acetate, 10-40% by weight of xylene), wherein the topic: the curing agent is characterized in that it is included in a weight ratio of 2-4: 0.5-2.

In another aspect, the present invention is a step of forming a first coating composition by combining 50-200 parts by weight of a diluent per 100 parts by weight of a resin composition, and then 0.05-4 parts by weight of a photocompatible compound; Applying the first coating composition to a product to be coated to a predetermined thickness; And it provides a coating method comprising a three step of curing the product coated with the first coating composition.

The second step is applied to a thickness of 3-20 micrometers, characterized in that the third step is carried out at 50-100 ℃.

The coating method is a four step of forming a second coating composition by combining 0.05-4 parts by weight of the photo-compatible compound per 100 parts by weight of the resin composition; It characterized in that it further comprises a five step of applying and curing the second coating composition on the product, the three steps are performed.

The fifth step is characterized in that it is carried out by irradiating ultraviolet rays in 400-1200mJ / ㎠, sec.

The resin composition used to form the first coating composition in the first step is 10 to 20% by weight of synthetic resin, 5 to 10% by weight of metal powder pigment, 15 to 20% by weight of toluene, 10 to 15% by weight of methyl isobutyl ketone, methyl acetate 15 ~ 25% by weight, n-butyl acetate 10-20% by weight, characterized in that it comprises 5-15% by weight of cellosolve acetate.

The resin composition used to form the second coating composition in step 4 is 20 to 30% by weight of synthetic resin, 20 to 30% by weight of reactive monomer, 3 to 8% by weight of quencher, 10 to 15% by weight of toluene, and 5 to 10% of ethyl acetate. Weight%, 5-10% by weight of xylene, 5-10% by weight of methyl isobutyl ketone, 5-10% by weight of ethyl cellosolve, and 2-5% by weight of photoinitiator.

The resin composition used to form the second coating composition in step 4 is 30 to 35% by weight of synthetic resin, 30 to 35% by weight of reactive monomer, 10 to 15% by weight of toluene, 20 to 25% by weight of ethyl acetate, methyl isobutyl ketone 10 15 wt%, 5-10 wt% ethyl cellosolve, 5-10 wt% isopropyl alcohol, and 2-5 wt% photoinitiator.

The resin composition used to form the first coating composition in the first step is 20 to 40% by weight of polyester melamine synthetic resin, 1 to 20% by weight of metal powder pigment, 1 to 10% by weight of reactive monomer, 1 to 10% by weight of butyl glycol acetate, 1 to 10% by weight of n-butyl acetate, 1 to 10% by weight of ethylene glycol monoethyl ester acetate, 10 to 30% by weight of xylene, 1 to 10% by weight of heptane, and 1 to 10% by weight of methyl alcohol. .

The resin composition used in forming the second coating composition in the fourth step is the main (urethane synthetic resin 40-50% by weight, xylene 20-40% by weight, n-butyl acetate 20-40% by weight, butyl cellosolve acetate 1-10% %) And a curing agent (30-70% by weight of hexamethylene diisocyanate, 10-40% by weight of n-butyl acetate, 10-40% by weight of xylene), wherein the topic: the curing agent is a weight ratio of 2-4: 0.5-2. Characterized in that included.

In addition, the present invention is a step of forming a first coating composition by combining 0.05-4 parts by weight of the photo-compatible compound per 100 parts by weight of the resin composition; Applying the first coating composition to a product to be coated to a predetermined thickness; And it provides a coating method comprising a three step of curing the product coated with the first coating composition.

The resin composition used to form the first coating composition in the first step is 20 to 30% by weight of synthetic resin, 20 to 30% by weight of reactive monomer, 10 to 15% by weight of toluene, 3 to 8% by weight of quencher, and 5 to 10% by weight of ethyl acetate. %, 5-10% by weight of xylene, 5-10% by weight of methyl isobutyl ketone, 5-10% by weight of ethyl cellosolve, and 2-5% by weight of photoinitiator.

The resin composition used to form the first coating composition in the first step is 30 to 35% by weight of synthetic resin, 30 to 35% by weight of reactive monomer, 10 to 15% by weight of toluene, 20 to 25% by weight of ethyl acetate, methyl isobutyl ketone 10 15 wt%, 5-10 wt% ethyl cellosolve, 5-10 wt% isopropyl alcohol, and 2-5 wt% photoinitiator.

The resin composition used to form the first coating composition in the first step is 20 to 30% by weight of synthetic resin, 20 to 30% by weight of reactive monomer, 10 to 15% by weight of toluene, 3 to 8% by weight of quencher, and 5 to 10% by weight of ethyl acetate. %, Xylene 5-10% by weight, methyl isobutyl ketone 5-10% by weight, ethyl cellosolve 5-10% by weight, photoinitiator 2-5% by weight, resin composition and synthetic resin 30-35% by weight, reactive monomer 30 35 wt%, 10-15 wt% toluene, 20-25 wt% ethyl acetate, 10-15 wt% methyl isobutyl ketone, 5-10 wt% ethyl cellosolve, 5-10 wt% isopropyl alcohol, photoinitiator 2 It is characterized by comprising a resin composition containing ˜5% by weight in a weight ratio of 0.1-99.9: 99.9-0.1.

The resin composition used when forming the first coating composition in the first step is the main (urethane synthetic resin 40-50% by weight, xylene 20-40% by weight, n-butyl acetate 20-40% by weight, butyl cellosolve acetate 1-10% %) And a curing agent (30-70% by weight of hexamethylene diisocyanate, 10-40% by weight of n-butyl acetate, 10-40% by weight of xylene), wherein the topic: the curing agent is a weight ratio of 2-4: 0.5-2. Characterized in that included.

In another aspect, the present invention provides a product coated with any one coating composition or any one coating method described above.

The product is characterized in that any one of a plastic extrusion product, a plastic injection product or a metal product, including a mobile phone, MP3 player or PDA.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

The present invention is flexible when heated to a suitable temperature is easily deformed when the force is applied from the outside, so that after molding and cooling in this state, the thermosetting property (urea-based, melamine) to keep it stable in the form without giving force afterwards Resins, phenolic, unsaturated ester, epoxy, resorcinoli, etc. and thermoplastics (vinyl acetate, acryl, polyamide, vinyl chloride, polyethylene) Disclosed are a coating composition having an optical effect, a method of coating with the coating composition, and a product coated with the coating composition using a resin composition including a resin and an optical compatibility compound.

First, the resin composition included in the coating composition according to the present invention may be used a resin composition of various compositions including synthetic resins, in particular, depending on the use of the coating composition, the coating strength, the use of diluents and the properties of the photo-compatible compound It is preferable that resin compositions 1 to 5 of resin compositions 5 to be used are used.

That is, the composition of the resin composition 1 is 10-20 wt% of synthetic resin, 5-10 wt% of metal powder pigment, 15-20 wt% of toluene, 10-15 wt% of methyl isobutyl ketone, 15-25 wt% of methyl acetate, n- Butyl acetate containing 10 to 20% by weight, cellosolve acetate 5 to 15% by weight,

The composition of the resin composition 2 is 20-30% by weight of synthetic resin, 20-30% by weight of reactive monomer, 3-8% by weight of matting agent 10-15% by weight of toluene, 5-10% by weight of ethyl acetate, 5-10% by weight of xylene, 5 to 10% by weight of methyl isobutyl ketone, 5 to 10% by weight of ethyl cellosolve, 2 to 5% by weight of photoinitiator,

The composition of the resin composition 3 was 30-35% by weight of synthetic resin, 30-35% by weight of reactive monomer, 10-15% by weight of toluene, 20-25% by weight of ethyl acetate, 10-15% by weight of methyl isobutyl ketone, ethyl cellosolve 5 It contains-10 weight%, 5-10 weight% of isopropyl alcohol, 2-5 weight% of photoinitiators,

The composition of the resin composition 4 is 20 to 40% by weight of polyester melamine synthetic resin, 1 to 20% by weight of metal powder pigment, 1 to 10% by weight of reactive monomer, 1 to 10% by weight of butyl glycol acetate, and 1 to 10% by weight of n-butyl acetate. 1 to 10% by weight of ethylene glycol monoethyl ester acetate, 10 to 30% by weight of xylene, 1 to 10% by weight of heptane, and 1 to 10% by weight of methyl alcohol,

The composition of the resin composition 5 consisted of a main body (40-50% by weight of urethane resin, 20-40% by weight of xylene, 20-40% by weight of n-butyl acetate, 1-10% by weight of butyl cellosolve acetate) and a curing agent (hexamethylene diisocyanate). 30 to 70% by weight, 10 to 40% by weight of n-butyl acetate, 10 to 40% by weight of xylene), wherein the topic: the curing agent is included in a weight ratio of 2-4: 0.5-2.

Here, the types and blending ratios of the components of the resin compositions 1 to 5 are not only optimal for uniformly blending the resin composition and maintaining the blended state, but also other components included in the coating composition according to the present invention. In consideration of the relationship with the above, the coating state of the coating composition including the resin compositions 1 to 5 is experimentally specified in an optimal content to numerically limit.

On the other hand, synthetic resins, which are components of the resin compositions, in particular, the resin compositions 1 to 3, as described above, both thermosetting resins and thermoplastic resins may be used. In particular, thermosetting resins include phenol resins, urea resins, melamine resins, alkyd resins, Unsaturated polyester resins, silicone resins, epoxy resins, urethane resins, silicon resins, fran resins, and the like may be used, and thermoplastic resins include acrylic resins, vinyl chloride resins, vinyl acetate resins, vinyl acetal resins, methylmethacrylate resins, and steels. Ron resin, polyethylon resin, nylon resin, etc. can be used.

More preferably, the acrylic resin, aliphatic urethane acrylate (Aliphatic Urethane Acrylate), acrylic polyol resin, urethane acrylate, tripropylene glycol diacrylate in order to impart properties such as eco-friendliness, water-soluble, UV-curable properties to the resin composition (Tripropylene glycol diacrylate) or trimethyolpropane tri acrylate (Trimethyolpropane tri acrylate) is to use at least one selected.

In addition, the resin compositions 1 and 4 include metal powder pigments, wherein the metal powder pigments are metal powders added to conventionally known pigments. First, a known pigment of a desired color is selected, and then any one of the metal powders described below is uniform. The compounding ratio is preferably in the range of 95-99% by weight of the known pigment and 1-5% by weight of the metal powder. In this case, any metal powder may be used as the metal powder, but any one selected from gold powder, silver powder, bronze powder, zinc oxide powder, titanium dioxide powder, carbon black powder, aluminum powder, and pearl (pearl) powder It is desirable to be. At this time, the mixing ratio of the pigment and the metal powder of the metal powder pigment and the content of the metal powder pigment contained in the resin composition is such that the state coated with the coating composition according to the present invention has a metallic effect, the light contained in the coating composition It is experimentally specific that the discoloration reaction that occurs when the compatible compound receives light is more likely to occur.

In addition, the reactive monomers included in the resin compositions 2 to 4 are used for the purpose of strengthening the strength of the coating composition as an auxiliary agent, and may use all the reactive monomers of a known configuration, but preferably an acrylate compound is used. It is. In particular, n-butyl acrylate (n-Butyl Acrylate) or metamethyl acrylate (MetaMethyl Acrylate) is more preferable.

 In addition, the matting agent included in the resin composition 2 is used at least one of silica, mica, aluminum paste (Al-Paste), sericite, talc powder, wherein the matting agent is a coating composition containing the resin composition As to control the gloss, the coating state of the coating composition including the resin composition containing the matting agent is a matte coating, the content of the matting agent can be determined according to the desired degree of gloss.

In addition, the photoinitiator included in the resin compositions 2 and 3 may be any photoinitiator of a known configuration, such as benzophenone, 2,4-diethyl thioxanthone, but the compound that causes light splitting in the molecule (Intramolecular photocleavage) compound Preference is given to using a series of photoinitiators.

Next, the photocompatible compound included in the coating composition according to the present invention means a compound exhibiting reversible phototropy or photochromism, and is colorless to colored by color reaction, and colored to colored. It refers to a compound that turns into. Such a compound changes its chemical structure when irradiated with light of a specific wavelength in a solution or solid state, and accordingly changes its absorption spectrum, but has a property of returning to its initial state when irradiated with light of a different wavelength or left in a dark place. Specific examples of the photocompatible compounds include inorganic halides and silver halides, and many organic compounds are known. However, depending on the reaction mode, isomerization of double bonds (azobenzene and thioindigo) and hydrogen transfer One based on compatibility (salicylidene aniline), one by ferry cyclic reactions (purgid), one causing cyclic addition reactions (anthracene), and one indicating ionic series of bonds (triphenylmethane, spiropyrane). . Representatively, the photoreaction of a spiropyrane compound is represented by Scheme 1 below.

Scheme 1

 As the photocompatible compound included in the coating composition of the present invention, all kinds of compounds described above may be used, but in particular, it is preferable to use a spiropyrane compound, a spiroxazine compound and a naphthopyrane compound, more preferably. Is one or more of spiro-naphtho-oxazine, trimethyl-nitrospiro-benzopyran, and cross linked stylenic copolymer.

Such photocompatible compounds are provided in the form of powders (oily) which are processed in neutral or processed in an aqueous state for use in aqueous solvents or used in aqueous solvents in the art. It is preferable. In addition, the content of the photocompatible compound may vary depending on the use of the coating composition, but in the present invention, it is preferable to include 0.05-4 parts by weight per 100 parts by weight of the resin composition. If the optical compatibility content is less than or greater than the content, the coating composition containing the photo-compatible compound is coated on the product and the desired color does not occur.

Next, the diluent included in the coating composition according to the present invention is any one or more selected from toluene, methyl isobutyl ketone, ethyl acetate, cyclohexanone, in particular 40 to 60% by weight of toluene, 15 to 25 methyl isobutyl ketone It is most preferable that weight%, 10-20 weight% of ethyl acetate, and 5-15 weight% of cyclohexanone are mix | blended. In addition, the content of the diluent is preferably 50 to 200 parts by weight per 100 parts by weight of the resin composition. At this time, the content ratio of the components constituting the diluent and the content of the diluent to be blended in the resin composition is experimentally specified to the optimum content to uniformly mix the components contained in the coating composition and maintain the blended state. The numerical value is limited.

Next, the coating composition according to the present invention may further include one or more of antioxidants, light stabilizers, methylene chloride, chloroform and methyl ethyl ketone to further improve the optical effect of the coating composition. The antioxidant and the light stabilizer may be of a known technical configuration, in particular phenolic and amine-based antioxidants are suitable for use in the present invention, in parallel with the organic phosphite-based antioxidant may be further used. In addition, the light stabilizer is preferably an amine light stabilizer.

  In this case, the amount of the material contained in the coating composition of the present invention is based on 100 parts by weight of the resin composition of the antioxidant is 0.001-0.04 parts by weight, the light stabilizer is 0.001- 0.1 parts by weight, the methylene chloride is 2- 4 parts by weight, the chloroform is 4-6 parts by weight, the methyl ethyl ketone is preferably included 1-3 parts by weight, the content ratio of the materials contained in the coating composition of the present invention is included in the coating composition In consideration of the properties of the components, the optical effect after coating and economics, etc., it is experimentally specified, and if the amount is less than or greater than the content specified, the desired effect cannot be obtained.

The coating composition according to the present invention is preferably prepared by mixing in the following order.

(Resin composition)

+

(Diluent: can be omitted depending on the composition of the resin composition)

+

{Photocompatible compound (powder form) + (at least one of antioxidant, light stabilizer, methylene chloride, chloroform, and methyl ethyl ketone)}

The formulation blended in the order described above may be stirred at 600 rpm for 3 to 5 / minute to produce a coating composition having the optical effect according to the present invention.

Next, a method of coating the coating composition thus blended on a product to obtain a photocompatibility effect will be described. Each condition of performing the coating method using the coating composition described below depends on the physical properties of the coating composition. In consideration of the ease and coating strength of the coating, the optical effect and the economical efficiency after coating, etc. are experimentally specified, and if performed under conditions that are numerically limited or higher, a desired effect may not be obtained.

First, 50-200 parts by weight of a diluent per 100 parts by weight of the resin composition is added, and then 0.05-4 parts by weight of the photocompatible compound is formed to form a first coating composition, and the first coating composition is applied to a product to be coated with a predetermined thickness. . The application here preferably consists of 3-20 micrometers thick. Thereafter, the first coating composition is cured, and the curing is preferably performed at 50-100 ° C.

As described above, the product may be completed by coating the product only with the first coating composition [when the resin composition included in the first coating composition is the resin composition 2 described above, In the case of the resin composition 3, when the resin composition 2 and the resin composition 3 is included in a weight ratio of 0.1-99.9: 99.9-0.1, it is preferable that the resin composition 5], in some cases, to form a second coating composition again In this case, the second coating composition may be coated on the cured surface of the first coating composition, and the second coating composition may be hardened by applying the second coating composition.

In this case, the composition of the second coating composition and the curing method of the second coating composition vary according to the composition of the first coating composition.

That is, the first coating composition is resin composition 1 (i.e., 10-20 wt% of synthetic resin, 5-10 wt% of metal powder pigment, 15-20 wt% of toluene, 10-15 wt% of methyl isobutyl ketone, 15-25 wt% of methyl acetate). , n-butyl acetate, 10 to 20% by weight of the resin composition containing 5 to 15% by weight of the cellosolve acetate)

The resin composition contained in the second coating composition is preferably a resin composition 2 or a resin composition 3. At this time, the composition of the second coating composition constitutes a specific compounding ratio according to the degree of gloss of matte and gloss in a coated state.

When the first coating composition and the second coating composition are selected as the composition as described above, the curing of the second coating composition is preferably performed by irradiating ultraviolet rays at 400-1200mJ / cm 2, sec.

On the other hand, the first coating composition is a resin composition 4 (that is, 20-40% by weight of polyester melamine synthetic resin, 0-20% by weight of metal powder pigment, 0-10% by weight of reactive monomer, 1-10% by weight of butyl glycol acetate, n 1-10 wt% butyl acetate, 1-10 wt% ethylene glycol monoethyl ester acetate, 10-30 wt% xylene, 1-10 wt% heptane, 1-10 wt% methyl alcohol) If it contains

The second coating composition preferably comprises a resin composition 5, in which case the curing of the second coating composition is preferably cured for 60 to 180 minutes at 60-90 ℃.

As described above, the coating composition and the coating method according to the present invention may be coated with various products regardless of materials and types, but are preferably plastic extrusion and injection products and metal products. Coating on mobile phones, PDAs, and MP3 players that are directly connected can realize a variety of designs, combining decoration and functional beauty, thereby improving the quality of coated products and satisfying consumer preferences.

Example 1

1. Preparation of the first coating composition

Resin composition 1 (15% by weight of acrylic resin, 8% by weight of metal powder containing aluminum powder, 18% by weight of toluene, 12% by weight of methyl isobutyl ketone, 20% by weight of methyl acetate, 15% by weight of n-butyl acetate, cellosolve acetate 12 100% by weight) and 130 g of a diluent (50% by weight of toluene, 20% by weight of methyl isobutyl ketone, 15% by weight of ethyl acetate, 15% by weight of cyclohexanone), followed by 0.7 g of spiro-naphtho-oxazine, oxidation 0.03 g of inhibitor, 0.04 g of light stabilizer, 3 g of methylene chloride, 5 g of chloroform, and 2 g of methyl ethyl ketone were mixed, followed by stirring at 600 rpm for 3 to 5 minutes to prepare a first coating composition a.

2. Coating of the first coating composition

For example, the first coating composition was coated with a thickness of 7 micrometers on a product to be coated, and then dried at 80 ° C. for 10 minutes to obtain a coated mobile phone a.

3. Preparation of Second Coating Composition

end. Resin composition 2 (25% by weight of acrylic polyol resin, 20% by weight of n-butyl acrylate, 5% by weight of silica, 13% by weight of toluene, 9% by weight of ethyl acetate, 7% by weight of xylene, 6% by weight of methyl isobutyl ketone, ethyl 10 g of cellosolve, 5 wt% of photoinitiator), 0.7 g of spiro-naphtho-oxazine, 0.03 g of antioxidant, 0.04 g of light stabilizer, 3 g of methylene chloride, 5 g of chloroform, 2 g of methyl ethyl ketone, and then mixed at 600 rpm. Stirring for 3 to 5 minutes to prepare a second coating composition (a).

I. Resin composition 3 (30 wt% acrylic resin, 30 wt% methacrylate acrylate, 10 wt% toluene, 10 wt% ethyl acetate, 7 wt% methyl isobutyl ketone, 5 wt% ethyl cellosolve, 5 wt% isopropyl alcohol 3 wt% photoinitiator) 100g, 0.7 g spiro-naphtho-oxazine, 0.03 g antioxidant, 0.04 g light stabilizer, 3 g methylene chloride, 5 g chloroform, methyl ethyl ketone 3 g 5 min at 600 rpm While stirring to prepare a second coating composition b.

4. Coating of Second Coating Composition

end. In order to impart another durability to the mobile phone a, the second coating composition a is applied to the mobile phone a with a thickness of 7 micrometers, and then the ultraviolet ray of 1000 mJ / cm 2 sec to cure the second coating composition a UV. Was investigated to obtain a mobile phone a-1 coated twice.

I. In order to give the cellular phone a further durability, the second coating composition b is applied to the mobile phone a with a thickness of 7 micrometers, and then the ultraviolet ray of 1000 mJ / cm 2 sec to cure the second coating composition b by ultraviolet ray. Was investigated to obtain a mobile phone a-2 coated twice.

Example 2

1. Preparation of the first coating composition

Resin composition 4 (30 wt% polyester melamine synthetic resin, 5 wt% aluminum powder containing metal powder pigment, 5 wt% metamethyl acrylate, 10 wt% butyl glycol acetate, 10 wt% n-butyl acetate, ethylene glycol monoethyl ester acetate 10% by weight, 10% by weight xylene, 10% by weight heptane, 10% by weight methyl alcohol) and diluent (50% by weight toluene, 20% by weight methyl isobutyl ketone, 15% by weight ethyl acetate, 15% by weight cyclohexanone) After mixing 130 g, 0.7 g of trimethyl-nitrospiro-benzopyran, 0.03 g of antioxidant, 0.04 g of light stabilizer, 30 g of methylene chloride, 30 g of chloroform, 10 g of methyl ethyl ketone, 10 g of xylene, and 3 at 600 rpm Stirring for 5 minutes to prepare a first coating composition b.

2. Coating of the first coating composition

For example, the first coating composition was coated on a product, for example, 7 micrometers thick, and dried at 80 ° C. for 10 minutes to obtain a coated mobile phone b.

3. Preparation of Second Coating Composition

Resin composition 5 [Material (40% by weight of urethane resin, 30% by weight of xylene, 20% by weight of n-butyl acetate, 10% by weight of butyl cellosolve acetate) and curing agent (30 to 70% of hexamethylene diisocyanate, 10 to 10% of 40%, xylene 10-40%) in a weight ratio of 3: 1] 0.7 g of trimethyl-nitrospiro-benzopyran, 100 g of antioxidant, 0.03 g of antioxidant, 0.04 g of light stabilizer, 3 g of methylene chloride, 5 g of chloroform, methylethyl The ketone was mixed with 2 g and stirred at 600 rpm for 3 to 5 minutes to prepare a second coating composition c.

4. Coating of Second Coating Composition

The second coating composition c is applied to the mobile phone b in a thickness of 7 micrometers to give another durability to the mobile phone b, and then treated twice at 90 ° C. for 180 minutes to cure the second coating composition c. Got a mobile phone b.

Example 3

1. Preparation of the first coating composition

Resin composition 2 (25% by weight of acrylic polyol resin, 20% by weight of n-butyl acrylate, 5% by weight of silica, 13% by weight of toluene, 9% by weight of ethyl acetate, 7% by weight of xylene, 6% by weight of methyl isobutyl ketone, ethyl 10 g of cellosolve, 5 g of photoinitiator), 0.7 g of cross linked stylenic copolymer, 0.03 g of antioxidant, 0.04 g of light stabilizer, 3 g of methylene chloride, 5 g of chloroform, 2 g of methyl ethyl ketone After mixing, the mixture was stirred at 600 rpm for 3 to 5 minutes to prepare a first coating composition c.

2. Coating of the first coating composition

The first coating composition c was applied to the mobile phone c with a thickness of 7 micrometers, and then, the first coating composition c was irradiated with ultraviolet light of 1000 mJ / cm 2 sec to cure the first coating composition c, thereby obtaining a mobile phone c coated once.

Example 4

1. Preparation of the first coating composition

Resin composition 3 (30 wt% acrylic resin, 30 wt% methacrylate acrylate, 10 wt% toluene, 10 wt% ethyl acetate, 7 wt% methyl isobutyl ketone, 5 wt% ethyl cellosolve, 5 wt% isopropyl alcohol , 3 wt% of photoinitiator), trimethyl-nitrospiro-benzopyran 0.7g, antioxidant 0.03g, light stabilizer 0.04g, methylene chloride 3g, chloroform 5g, methyl ethyl ketone 3g 5 minutes at 600rpm Stirring to prepare a first coating composition d.

2. Coating of the first coating composition

The first coating composition d was applied to the mobile phone d with a thickness of 7 micrometers, and then, the first coating composition d was irradiated with ultraviolet light of 1000 mJ / cm 2 sec to cure the first coating composition d, thereby obtaining a mobile phone d coated once.

Example 5

1. Preparation of the first coating composition

Resin composition 5 [100 g of main ingredient (40% by weight of urethane resin, 30% by weight of xylene, 20% by weight of n-butyl acetate, 10% by weight of butyl cellosolve acetate) and a curing agent (30 to 70% of hexamethylene diisocyanate, n-butyl acetate ~ 40%, xylene 10-40%) in a weight ratio of 3: 1] 130 g of diluent (50% by weight of toluene, 20% by weight of methyl isobutyl ketone, 15% by weight of ethyl acetate, 15% by weight of cyclohexanone) After compounding, 0.7 g of spiro-naphtho-oxazine, 0.03 g of antioxidant, 0.04 g of light stabilizer, 3 g of methylene chloride, 5 g of chloroform and 2 g of methyl ethyl ketone were mixed and stirred at 600 rpm for 3 to 5 minutes. To prepare a first coating composition e.

2. Coating of the first coating composition

The first coating composition e was applied to the mobile phone e to a thickness of 7 micrometers, and then treated for 90 minutes at 90 ° C. to cure the first coating composition e to obtain a mobile phone e coated once.

Experimental Example

Coating reliability was tested on the mobile phones a, b, c, d, and e obtained in Examples 1 to 5. Table 1 shows the test items, test methods and acceptance criteria specified in the coating reliability test standards [UV coating (LG Electronics), urethane coating (Samsung Electronics)] provided by LG Electronics and Samsung Electronics. The mobile phones a, b, c, d, and e obtained in Examples 1 to 5 as described in Table 1 above were tested and the results are shown.

(○: very good, △: excellent, ×: poor)

When coating with the coating composition according to the present invention from Table 2, it can be seen that it provides a quality of more than the level required by the coating test reliability standard provided by the industry, coating reliability of the product coated with the coating composition according to the present invention It can also be seen that this is very good.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the coating composition according to the present invention, the method of coating with the coating composition and the product coated with the coating composition has the following effects.

First, when the coating composition and the coating method of the present invention has an optical effect of changing the color according to the amount of light, it is possible to grasp the amount of ultraviolet rays as well as to produce various colors.

In addition, when the coating composition and the coating method of the present invention is coated, it prevents oxidation of metals and has chemical resistance and water resistance.

In addition, the coating composition and coating method of the present invention can be applied to the coating of mobile phones, MP3 players, other plastic extrusion and injection products and metal products in a manner that can implement a variety of colors as well as environmentally friendly quality enhancement. Therefore, the variety of designs can realize consumer's preference.

Claims (28)

50 to 200 parts by weight of a diluent composed of 40 to 60% by weight of toluene, 15 to 25% by weight of methyl isobutyl ketone, 10 to 20% by weight of ethyl acetate, and 5 to 15% by weight of cyclohexanone per 100 parts by weight of the resin composition, A coating composition, comprising 0.05-4 parts by weight of a photocompatible compound. delete The coating composition of claim 1, further comprising at least one of an antioxidant, a light stabilizer, methylene chloride, chloroform, and methyl ethyl ketone. The method according to claim 3, wherein the antioxidant composition is 0.001-0.04 parts by weight, the light stabilizer is 0.001- 0.14 parts by weight, the methylene chloride is 2-4 parts by weight, the chloroform is 4-6 parts by weight, per 100 parts by weight of the resin composition, The methyl ethyl ketone is a coating composition, characterized in that included in 1-3 parts by weight. According to claim 1, wherein the resin composition is 10 to 20% by weight of synthetic resin, 5 to 10% by weight of metal powder pigment, 15 to 20% by weight of toluene, 10 to 15% by weight of methyl isobutyl ketone, 15 to 25% by weight of methyl acetate, n Coating composition comprising 10 to 20% by weight of butyl acetate, 5 to 15% by weight of cellosolve acetate. According to claim 1, wherein the resin composition is 20 to 40% by weight of polyester melamine synthetic resin, 1 to 20% by weight of metal powder pigment, 1 to 10% by weight of reactive monomer, 1 to 10% by weight of butyl glycol acetate, n-butyl acetate 1 ~ A coating composition comprising 10% by weight, 1-10% by weight of ethylene glycol monoethyl ester acetate, 10-30% by weight of xylene, 1-10% by weight of heptane, and 1-10% by weight of methyl alcohol. delete delete 0.05-4 parts by weight of the photocompatible compound is contained per 100 parts by weight of the resin composition, and includes at least one of an antioxidant, a light stabilizer, methylene chloride, chloroform, and methyl ethyl ketone, wherein the antioxidant is contained in an amount of 0.001- 0.04 parts by weight, the light stabilizer is 0.001-0.1 parts by weight, the methylene chloride is 2-4 parts by weight, the chloroform is 4-6 parts by weight, the methyl ethyl ketone coating is characterized in that it comprises 1-3 parts by weight Composition. 0.05-4 parts by weight of the photo-compatible compound is added per 100 parts by weight of the resin composition, wherein the resin composition is 20-30% by weight of synthetic resin, 20-30% by weight of reactive monomer, 3-8% by weight of matting agent, 10-15% by weight of toluene, ethyl 5-10% by weight of acetate, 5-10% by weight of xylene, 5-10% by weight of methyl isobutyl ketone, 5-10% by weight of ethyl cellosolve, and 2-5% by weight of photoinitiator. delete delete 1 step of blending 50-200 parts by weight of the diluent per 100 parts by weight of the resin composition, and then mixing 0.05-4 parts by weight of the photocompatible compound to form a first coating composition; Applying the first coating composition to a product to be coated to a predetermined thickness; Three steps of curing the product coated with the first coating composition; 4 steps of forming a second coating composition by combining 0.05-4 parts by weight of the photo-compatible compound per 100 parts by weight of the resin composition; And It includes five steps of curing by applying the second coating composition to the product, the three steps are performed,  The coating method is characterized in that the five steps are carried out by irradiating with ultraviolet light at 400-1200mJ / ㎠, sec. The coating method according to claim 13, wherein the second step is applied at a thickness of 3-20 micrometers, and the third step is performed at 50-100 ° C. delete delete The resin composition used in forming the first coating composition in the first step is 10 to 20% by weight of synthetic resin, 5 to 10% by weight of metal powder pigment, 15 to 20% by weight of toluene, 10 to 15% by weight of methyl isobutyl ketone. %, 15-25 wt% methyl acetate, 10-20 wt% n-butyl acetate, 5-15 wt% of cellosolve acetate. The resin composition used in forming the second coating composition in step 4 is 20 to 30% by weight of synthetic resin, 20 to 30% by weight of reactive monomer, 3 to 8% by weight of quencher, 10 to 15% by weight of toluene, ethyl 5 to 10% by weight of acetate, 5 to 10% by weight of xylene, 5 to 10% by weight of methyl isobutyl ketone, 5 to 10% by weight of ethyl cellosolve, and 2 to 5% by weight of photoinitiator. delete The resin composition used in forming the first coating composition in the first step is 20 to 40% by weight of polyester melamine synthetic resin, 1 to 20% by weight of metal powder pigment, 1 to 10% by weight of reactive monomer, butyl glycol acetate 1 10 wt%, 1-10 wt% of n-butyl acetate, 1-10 wt% of ethylene glycol monoethyl ester acetate, 10-30 wt% of xylene, 1-10 wt% of heptane, 1-10 wt% of methyl alcohol Coating method characterized in that. delete delete 1 step of forming a first coating composition by combining 0.05-4 parts by weight of the photo-compatible compound per 100 parts by weight of the resin composition; Applying the first coating composition to a product to be coated to a predetermined thickness; And three steps of curing the product coated with the first coating composition. The resin composition used to form the first coating composition in the first step is 20 to 30% by weight of synthetic resin, 20 to 30% by weight of reactive monomer, 10 to 15% by weight of 3 to 8% toluene quencher, 5 to 10% by weight of ethyl acetate %, 5-10 wt% xylene, 5-10 wt% methyl isobutyl ketone, 5-10 wt% ethyl cellosolve, 2-5 wt% photoinitiator. delete delete delete Claim 1, 3, 4 to 6, 9, 10, wherein the coating composition of any one of claims 13, 14, 17, 18, 20, A product coated by the coating method of claim 23. 28. The product of claim 27, wherein the product is any one of a plastic extrusion product, a plastic injection product or a metal product including a mobile phone, an MP3 player or a PDA.