KR20090059972A - Kitchen furniture having superior stain resistance - Google Patents

Abstract

Kitchen furniture with a superior stainning resistance is provided, which prevents the damage of the surface and maintains the interior function long. Kitchen furniture with a superior stainning resistance includes a surface processing layer(10) coated with coating composition containing silicon denaturation urethane acrylate oligomer and isocyanate modified urethane acrylate oligomer. The content of the isocyanate modified urethane acrylate oligomer and silicon denaturation urethane acrylate oligomer is 20-60wt.% against the coating composition total weight. The surface processing layer is comprised of the top layer(11) in the upper part, and the middle layer(12) and undercoat layer(13).

Description

Kitchen furniture having superior stain resistance

The present invention relates to kitchen furniture, and more particularly to kitchen furniture having excellent stain resistance, which is a problem of customer's dissatisfaction, surface scratches, scratches and crush marks caused by heavy weights. will be.

Kitchen furniture has various products on the market due to customer's demand for appearance. Among them, the products made of medium density fiberboard (MDF) or particle board (PB) are used to enjoy high gloss effect such as glass. The effect is shown through the painting.

Such kitchen furniture is easily stained by children's graffiti or contaminants, which cannot be easily erased. If the surface is scratched, customer dissatisfaction with the kitchen furniture may occur.

Among the conventional untreated techniques, the structure which coats MDF or PB on the upper, middle, and top coats has a weak surface strength, and it is difficult to remove the contamination by foodstuffs such as oil magic, ball pen, writing utensils, red pepper paste, and miso.

The upper coating is produced by treating the urethane acrylate-based paint 4 to 6 times with a conventional method even under the urethane acrylate paint.

Japanese Patent Laid-Open Publication No. 1999-268174 discloses a stucco plate in which a base coat layer, an ionizing radiation curable resin layer, a pattern printing layer, and an overcoat layer are sequentially stacked on an upper surface of an inorganic substrate, wherein the pattern printing layer is formed of an ionizing radiation curable resin. An inorganic stucco plate is disclosed, which is formed by transfer curing and transfer transfer, and the overcoat layer is formed of an ionizing radiation curable resin paint composed of a reactive silicone acrylate resin.

US Patent No. 6521298 discloses a method of reinforcing a substrate by applying polyurethane to an acrylic substrate used in a sink or the like.

Korean Utility Model Registration No. 425829 has an isolator (urethane resin) coating layer and a UV coating layer on the outer surface of a plate having a melamine resin impregnated layer and bonded to each other by fusion bonding, and to form a high-gloss resin coating layer thereon Disclosed is a plate formed by forming a high gloss UV coating layer on a surface of a plate having a melamine resin impregnated layer.

However, this patent does not disclose the use of isocyanate-modified urethaneacrylate oligomers.

Accordingly, the present invention is to solve the conventional problems as described above, by preventing the damage to the surface by improving the stain resistance, scratch resistance, etc. of the kitchen furniture pollution resistance that can maintain the interior function longer than conventional products Its purpose is to provide this superior kitchen furniture.

The present invention to achieve the above object, Provided is a kitchen furniture comprising a surface treatment layer coated with a coating composition containing a silicone-modified urethane acrylate oligomer and an isocyanate-modified urethane acrylate oligomer.

Contamination occurs easily with other resins, but the combination of silicone-modified and isocyanate-modified oligomers can contribute to the improvement of fouling resistance. This is because the moisture curing mechanism due to the isocyanate group can partially act to maintain continuous fouling resistance.

The content of the silicone-modified urethane acrylate oligomer and the isocyanate-modified urethane acrylate oligomer in the present invention is preferably 20 to 60% by weight based on the total weight of the coating composition. If the content of these two modified oligomer is less than 20% by weight, the durability of fouling resistance is inferior, and if it exceeds 60% by weight, paint compatibility is low due to the increase in viscosity. In addition, the weight ratio of the silicone-modified urethane acrylate oligomer and the isocyanate-modified urethane acrylate oligomer is preferably added in a ratio of 1: 0.5 to 1.

In the present invention, the surface treatment layer is composed of a top coat layer, a middle coat layer and a bottom coat layer from above, and it is preferable to apply a coating composition containing a silicone-modified urethane acrylate oligomer and an isocyanate-modified urethane acrylate oligomer to the top coat layer. Applying these two modified oligomers to the top layer can enhance fouling resistance.

In the present invention, the coating composition is preferably a solvent-free UV-curable coating composition to which the antimicrobial agent is added in order to improve the environment and pollution resistance and to provide antimicrobial properties.

In the present invention, the surface-treated layer containing the silicone-modified urethane acrylate oligomer and the isocyanate-modified urethane acrylate oligomer is preferably applied to the door of the kitchen furniture.

Kitchen furniture having excellent pollution resistance according to the present invention is significantly reduced surface contamination compared to conventional kitchen furniture is excellent in terms of function and health as an interior.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a kitchen furniture according to the present invention, the kitchen furniture is composed of a surface treatment layer 10 and the substrate 20 from above, MDF, PB and the like can be used as the substrate 20.

The surface treatment layer 10 is composed of a top coat layer 11, a middle coat layer 12, and a bottom coat layer 13 from above.

In the kitchen furniture comprising a surface treatment layer consisting of the undercoat, midway, and top, the surface treatment method of kitchen furniture generally known is a method of imparting gloss using UV paint and polyester using urethane acrylate resin. The gloss of kitchen furniture can be imparted by various methods such as the use of a solvent-type urethane resin to impart gloss.

In such a surface treatment method, a solvent-free ultraviolet curing method is most suitable for improving the stain resistance as a paint that can maintain eco-friendliness.

The antifouling agent to be cured by the UV curing method applied to each layer of the surface treatment layer 10 is composed of oligomers, monomers, photoinitiators, additives and the like.

As an oligomer, an isocyanate modified urethane acrylate oligomer, a silicone modified urethane acrylate oligomer, a urethane acrylate oligomer, an unsaturated polyester acrylate oligomer, etc. can be used.

Examples of the monomer include monofunctional monomers such as HPA (Hydroxy Propyl Acrylate) and SM (Styrene monomer); Bifunctional monomers such as DiPropylene Glycol DiAcrylate (DPGDA), 9-Ethylene Glycol DiAcrylate (9-EGDA), and HexaneDiol DiAcrylate (HDDA); Trifunctional monomers such as Glyceryl Propoxylated TriAcrylate (GPTA) and TriMethylol Propane TriAcrylate (TMPTA); Hexafunctional monomers, such as DPHA (DiPentaerylthritol HexaAcrylate), etc. can be used.

Acetophenone etc. can be used as a photoinitiator.

As the additive, reactive silicone, antisettling agent, silicone, antifoaming agent, antimicrobial agent and the like can be used.

Antimicrobials can be broadly divided into organic and inorganic antimicrobials. Organic antimicrobial agents include urea, triazine, and aldehydes.Inorganic antimicrobials are mainly made by substituting silver, zinc, copper, etc., metal ions which have antimicrobial activity on inorganic materials such as zeolite, calcium phosphate, zirconium phosphate, and silica gel. It is currently used in various fields such as plastic products, paper, and textiles.

Surface treatment method for implementing a high gloss stain-resistant kitchen furniture product according to the present invention is as follows.

First, the surface of the substrate 20 is polished using a sanding machine and sanding papers (# 180 to 220) in a holding step.

Next, the UV wood sealer is coated by a roll coating method once or twice by the undercoating process.

UV wood sealer is composed of reactive monomer, photoinitiator, and additive mainly composed of urethane acrylate resin.

Next, the UV sanding sealer is coated by a roll coating method 1 to 2 times to form the undercoat layer 13.

UV sanding sealer is composed of reactive monomer, photoinitiator, additives and extender pigment mainly composed of urethane acrylate resin. As the extender pigment, a silica type is preferable, and the amount thereof is preferably 5 to 10% by weight. If the content of the extender pigment is less than 5% by weight, the adhesion strength is lowered. If it exceeds 10% by weight, the amount of liquid is relatively decreased in the wood sealer formulation, thereby weakening the adhesion.

After the polishing process again, polishing is carried out with sanding paper (# 180 to 220).

Next, the intermediate layer 12 is formed by coating the UV intermediate coating with a curtain coater once or twice with a intermediate process.

UV intermediate paint is the same as UV sanding sealer, and it is re-coated with sanding sealer to finish the middle process.

After the polishing process again, polishing is carried out using a sanding paper of # 320 to 600.

Lastly, the top coat coating, in which the stain resistance is added, is coated with a curtain coater in the top coat process to form the top coat layer 13.

Applying a coating composition containing an isocyanate-modified urethane acrylate oligomer to the top layer 13 gives excellent fouling resistance, the coating composition is 20 to 60% by weight of an oligomer comprising an isocyanate-modified urethane acrylate oligomer; 30 to 70% by weight of monomers such as bifunctional monomers and trifunctional monomers; 1 to 10 wt% of photoinitiators such as acetophenone; 0.1 to 5% by weight of an additive such as reactive silicone.

Example 1

The coating composition having the composition of Table 1 was applied to the top layer to prepare a door of high gloss and stain-resistant kitchen furniture. The coating method was a curtain coater, and the coating amount was coated at 120 to 130 g / m 2, and cured at a rate of 50 m / min using two medium pressure mercury lamps having a 100 W / in output.

ingredient Content (wt%) Silicone modified urethane acrylate oligomer 25 Isocyanate modified urethane acrylate oligomer 25 GPTA (trifunctional monomer) 10 DPGDA (bifunctional monomer) 35 Acetophenone (photoinitiator) 4.5 Reactive Silicon (Additive) 0.5

Comparative Example 1

The coating composition having the composition shown in Table 2 was applied to the top layer to prepare the door of the kitchen furniture. The coating method was a curtain coater, and the coating amount was coated at 120 to 130 g / m 2, and cured at a rate of 50 m / min using two medium pressure mercury lamps having a 100 W / in output.

ingredient Content (wt%) Silicone modified urethane acrylate oligomer 8 Urethane Acrylate Oligomer 4 Unsaturated polyester acrylate oligomer 33 DPHA (6-functional monomer) 10 TMPTA (trifunctional monomer) 13 DPGDA (bifunctional monomer) 4 9-EGDA (bifunctional monomer) 5 HDDA (bifunctional monomer) 8 HPA (monofunctional monomer) 4 SM (monofunctional monomer) 3 Acetophenone (photoinitiator) 6 Reactive Silicon (Additive) 0.5 Sedimentation inhibitors (additives) 0.5 Silicone (additive) 0.5 Defoamer (additive) 0.5

Comparative Example 2

The coating composition having the composition of Table 3 was applied to the top layer to prepare the door of the kitchen furniture. The coating method was a curtain coater, and the coating amount was coated at 120 to 130 g / m 2, and cured at a rate of 50 m / min using two medium pressure mercury lamps having a 100 W / in output.

ingredient Content (wt%) Silicone modified urethane acrylate oligomer 20 Urethane Acrylate Oligomer 30 GPTA (trifunctional monomer) 20 HPA (monofunctional monomer) 10 SM (monofunctional monomer) 14 Acetophenone (photoinitiator) 5 Reactive Silicon (Additive) 0.5 Silicone (additive) 0.3 Defoamer (additive) 0.2

Comparative Example 3

The coating composition having the composition of Table 4 was applied to the top layer to prepare a door of the kitchen furniture. The coating method was a curtain coater, and the coating amount was coated at 120 to 130 g / m 2, and cured at a rate of 50 m / min using two medium pressure mercury lamps having a 100 W / in output.

ingredient Content (wt%) Silicone modified urethane acrylate oligomer 28.7 DPHA (6-functional monomer) 30 GPTA (trifunctional monomer) 25 HPA (monofunctional monomer) 11 Acetophenone (photoinitiator) 5 Silicone (additive) 0.3

[Test Example]

Table 5 is a result of comparing the performance of the kitchen furniture doors prepared in Examples 1 and Comparative Examples 1 to 3, the kitchen furniture according to the present invention exhibited excellent pollution resistance while maintaining a high gloss compared to the existing products.

characteristic Repulsive characteristics (initial) Repulsion characteristics (after wiping the surface) Surface residual state Surface hardness Polish Surface condition Contact angle Surface condition Contact angle Example 1 ○ 87 ○ 85 5 2H 95 Comparative Example 1 ○ 87 × 65 4 H 93 Comparative Example 2 ○ 85 × 60 3 H 90 Comparative Example 3 ○ 90 × 55 3 2H 94

1 is a cross-sectional view of the kitchen furniture according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: surface treatment layer

11: top layer

12: middle class

13: subfloor

20: description

Claims (6)

Kitchen furniture comprising a surface treatment layer coated with a coating composition containing a silicone-modified urethane acrylate oligomer and an isocyanate-modified urethane acrylate oligomer. The kitchen furniture according to claim 1, wherein the content of the silicone-modified urethane acrylate oligomer and the isocyanate-modified urethane acrylate oligomer is 20 to 60 wt% based on the total weight of the coating composition. The kitchen furniture according to claim 1, wherein the weight ratio of the silicone-modified urethane acrylate oligomer and the isocyanate-modified urethane acrylate oligomer is 1: 0.5 to 1. The coating composition according to claim 1, wherein the surface treatment layer is composed of a top coat layer, a middle coat layer and a bottom coat layer from above, and a coating composition containing a silicone-modified urethane acrylate oligomer and an isocyanate-modified urethane acrylate oligomer is applied to the top coat layer. Kitchen furniture. The kitchen furniture according to claim 1, wherein the coating composition is a solvent-free UV-curable coating composition to which an antimicrobial agent is added. The kitchen furniture according to claim 1, wherein a surface treatment layer is applied to the door of the kitchen furniture.

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