• Title/Summary/Keyword: 자외선 경화도료

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Thermal Stability and Surface Hardnes of UV-curable Epoxy Acrylate Coatings for Wooden Flooring (마루바닥재용 자외선 경화형 에폭시 아크릴레이트 도료의 열안정성과 표면경도)

  • Hwang, Hyeon-Deuk;Choi, Jae-Hoon;Moon, Je-Ik;Kim, Hyun-Joong
    • Journal of the Korean Wood Science and Technology
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    • v.36 no.6
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    • pp.121-129
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    • 2008
  • Environmental friendly UV-curable coatings, having excellent hardness, gloss, mar and chemical resistance, are commonly used for the wooden flooring coatings. Especially epoxy acrylate oligomers are chosen for the wooden flooring coatings, due to their thermal stability and fast curing. In this study, we investigated the effect of the acrylate functionality on the thermal stability and surface hardness. The thermal degradations of monomers, oligomer, photoinitiator and formulated coatings with different acrylate functionality were measured using a thermogravimetric analysis (TGA). And the surface hardness was also measured with a pendulum hardness tester to compare relationship between the thermal stability and the physical property. The cured coatings became thermally stable by crosslinking during UV-curing. Both the thermal stability and surface hardness of cured coatings were improved with increasing acrylate functionality.

Investigating the Antibacterial Qualities of Copper Particle-Infused UV-Curable Paint for Wood Flooring Boards (구리입자 기반 UV경화도료 코팅 목질 마루판의 항균 특성)

  • Lee, Dong-Gun;Lim, Nam-Gi;Koh, Jae-Song
    • Journal of the Korea Institute of Building Construction
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    • v.23 no.4
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    • pp.393-404
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    • 2023
  • This research evaluates the antibacterial and transparency properties of UV-curable paint augmented with 20wt% copper particles. The transparency assessment indicated that the paint maintained a total luminous transmittance of 90% or above, thereby matching or surpassing the performance of standard UV-curing paints. To further test its antibacterial capabilities, wooden flooring boards were coated with the UV-curable paint laced with 20wt% copper particles, which had been surface-modified with a silane coupling agent. Following the fatigue tests of these treated boards, an impressive bacterial reduction rate of 99.9% was noted after a span of 6 hours, demonstrating the paint's exceptional antibacterial performance.

Application of UV Curable Coating for the Surface Protection of Polymeric Materials: PVC and Polystyrene (고분자 물질의 표면 보호를 위한 자외선 경화 도료의 응용)

  • Moon, Myung-Jun;Park, Jin-Hwan;Lee, Gun-Dae;Suh, Cha-Soo;Kim, Jong-Rae
    • Applied Chemistry for Engineering
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    • v.2 no.2
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    • pp.175-184
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    • 1991
  • Ultraviolet curable coatings are often used to protect the surface of polymer materials exposed to the ultraviolet radiation. However, the adhesion of epoxy acrylate on poly(vinyl chloride) and the UV curable coating on polystyren are poor. The objective of this work was to improve the adhesion of coating according to various formulations of the reactive diluents and finishing methods using the photografting of multifunctional acrylate and the surface activation on polymer surface impregnated a phtoinitiator. The addition of Tripropylene glycole diacrlate in the formulation of coating results in the improvement of adhesion of coating due to the flexibility. But the increase of the crosslinking density which results from the oxidation of surface during the exposure of UV radiation caused the loss of adhesion of coating exept the photografting method. In the trimethylolpropane triacrylate the improvement of adhesion are considerable due to the chemical bond between multifundtional acrylate and surface. From this work we expect to achieve the varity and functionality in the formulation of coating according to the photografting and surface activating of polymer.

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Synthesis and Curing Behavior of UV-curable Polycarbonate-based Polyurethane Methacrylate : Effect of Polyol Molecular Weight, Contents of Photoinitiator and Monomers on the Flexibility and Properties (자외선 경화형 폴리카보네이트계 폴리우레탄 메타아크릴레이트의 합성과 경화거동 : 폴리올 분자량, 광개시제 및 모노머 함량이 유연성과 물성에 미치는 영향)

  • Park, Eun-Suk;Hwang, Hyeon-Deuk;Park, Cho-Hee;Lee, Yong-Hee;Moon, Je-Ik;Kim, Hyun-Joong
    • Journal of Adhesion and Interface
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    • v.12 no.2
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    • pp.47-55
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    • 2011
  • UV-curable coatings have been used in various industries due to their advantages such as high mechanical property, good solvent resistance, fast curing process and low volatile organic compounds. However, a lack of flexibility of UV-cured films is a weak point for the pre-coated system of roll-to-roll process. In this study, UV-curable polycarbonate-based methacrylates were synthesized with polycarbonate diol, isophorone diisocyanate and 2-hydroxyethylmethacrylate to improve flexibility of the UC-cured films. The effects of polyol molecular weight, content of photoinitiator and monomers on the UV-curing behavior, flexibility and properties were investigated. The UV-curing behavior was measured by a photo-DSC, the pendulum hardness, tensile strength, viscoelastic properties were also evaluated.

Viscoelastic and Acoustic Characterization of Coatings for Stringed Instruments (현악기용 음향기능성 도료의 점탄성적 성질과 음향적 성질)

  • Choi, Jae-Hoon;Lee, Byoung-Hoo;Kim, Hyun-Joong;Chung, Woo-Yang
    • Journal of the Korean Wood Science and Technology
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    • v.33 no.4 s.132
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    • pp.15-22
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    • 2005
  • The acoustic properties of various coatings for stringed musical instruments made were investigated. The applied coatings were urethane topcoat, oil stain, natural varnish, cashew and UV-curable epoxy coating. Acoustic properties of coatings inferred from a resonance frequency and a damping measured by FFT analyzer and tan ${\delta}$ measured by DMTA. Acoustic properties from resonance frequency and damping were analyzed. Optimum coating for stringed instruments was determined by viscoelastic properties and acoustic properties of coating.

Acoustic Characterization of Coatings for Stringed Instruments with Various Coating Thickness (도막두께에 따른 현악기용 도료의 음향적 성질)

  • Choi, Jae-Hoon;Hwang, Heon-Deuk;Lee, Byoung-Hoo;Kim, Hyun-Joong;Chung, Woo-Yang
    • Journal of the Korean Wood Science and Technology
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    • v.34 no.1
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    • pp.32-39
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    • 2006
  • The acoustic properties of various coatings for stringed musical instruments made were investigated. The applied coatings were urethane topcoat, oil stain and UV-curable epoxy coating. Acoustic properties of coatings inferred from the elastic modulus and the shear modulus that ware calculated from a resonance frequency and a damping measured by FFT analyzer. The relationship between elastic modulus and density and the relationship between elastic modulus and shear modulus of coatings for stringed musical instruments ware investigated as a function of coating thickness.

Development of Surface Improvement Technique of Japanese Larch flooring Board(I) (낙엽송 마루판재의 표면강화처리기술개발(I))

  • Park, Sang-Bum
    • Journal of the Korean Wood Science and Technology
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    • v.27 no.3
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    • pp.31-38
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    • 1999
  • This paper deals with a coating technique of hardening surface layer of softwood{Larix leptolepis) flooring board to improve its surface properties such as hardness and abrasion resisitance without spoiling its exellent qualities such as beautiful color tones and great strength. For surface hardening of the wood, polyurethane wood sealer was used as under coat, polyurethane sanding sealer as intermediate coat, and UV-curing epoxy acrylate and urethane acrylate varnishes as top coat. The hardness of the wood was improved by the coating treatment and it was similar to that of high density hardwood such as oak, keruing. The abrasion resistance of the coated wood was greatly improved by UV curing epoxy acrylate or urethane acrylate varnishes. Adhesion properties and impact resisitance of the coated wood surface were also good. It was suggested that the well-coated larch wood could be used as interior flooring board as substitute for hardwood such as keruing.

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