Article
  • Preparation and Curing Behavior of Polyurethane Coating by Polyester/Lactone Polyol and HDI-biuret
  • Choi YH, Kim DW, Hwang KH, Park HS, Kim TO
  • 폴리에스테로/락톤 폴리올과 HDI/Biuret에 의한 폴리우레탄 도료의 제조 및 경화거동
  • 최용호, 김대원, 황규현, 박홍수, 김태욱
Abstract
Benzoic acid polyester/lactone polyol were synthesized by polycaprolactone 0201 as diol, trimethylolpropane as triol, adipic acid as dibasic acid, and benzoic acid as monobasic acid. Polyisocyanate prepolymer Desmo역 N-100 of HDI-biuret type was used in this study. Two-component polyurethane coating were prepared by blending benzoic acid polyester/polycaprolactone, polyisocyanate, wetting/dispersing agent, white pigment, and flowing agent. Various properties were examined on the film coated with the prepared polyurethane. They showed excellent physical properties such as abrasion resistance, accelerated weathering resistance, and yellowness index, They also showed good physical properties such as flexibility, impact resistance, 60。specular gloss, cross hatch adhesion, hydrocarbon resistance, and lightness index difference, Hardness of coating showed a little poor character. The introduction of polycaprolactone 0201 as diol in the polyurethane coatings improved the hydrocarbon resistance, inpact resistance, and flexibility of coatings According to the drying and curing behavior with the contents of benzoic acid, they seem to have resonable coating properties such as drying time of 2 to 4 hours and pot-life time of 20 to 37 hours.

벤조산 폴리에스테르/락톤 폴리올의 합성은 디올로서 폴리카프락톤 0201, 트리올로서 트리메틸올프로판, 2염기산으로서 아디프산 및 1염기산으로 벤조산을 사용하였다. 폴리이소시아네이트 프리폴리머는 HDI-biuret형인 Desmo역 N-100을 사용하였다. 벤조산 폴리에스테르/락톤 폴리올, 폴리이소시아네이트, 안료, 습윤분산제 및 플로우개량제 등을 블렌드하여 2성분계 폴리우레탄 도료를 제조하였다. 제조된 폴리우레탄 도료로서 도막시편을 제작하여 각종 도막 물성시험을 행한 결과 KS 규격에서 제시한 기준치와 비교하여 내마모성, 촉진내후성, 황변도는 우수하게, 굴곡성, 내충격성, 60°C 경면광택도, 접착력, 내유성, 명도지수차는 양호하게, 경도는 다소 나쁘게 나타났다. 따라서 디올로서 폴리카프로락톤 0201을 도입한 후 내유성, 굴곡성, 내충격성의 장점이 나타남을 확인하였다. 또한 벤조산 함량변화에 따른 고화 및 경화거동을 살펴 본 결과, 고화에 따른 건조시간은 2∼4시간으로, 경화에 따른 가사시간은 20∼37시간으로 각각 나타나, 도막표면의 고화 및 경화상태가 양호함을 보여주었다.

References
  • 1. Tehranisa M, Ryntz RA, Xiao HX, Kordomenos PI, Frisch KC, J. Coat. Technol., 59(746), 43 (1987)
  •  
  • 2. Laas HJ, Halpaap R, Meier HU, Schultz WEuro. Patent, 08060091 A2 (1996)
  •  
  • 3. Shoemaker SH, J. Coat. Technol., 62(787), 49 (1990)
  •  
  • 4. Jacobs PB, Yu PC, J. Coat. Technol., 65(822), 45 (1993)
  •  
  • 5. Park H, Keun J, Lee K, J. Polym. Sci. A-Polym. Chem., 34(8), 1455 (1996)
  •  
  • 6. Park HS, Hahm HS, Park EK, J. Appl. Polym. Sci., 61(3), 421 (1996)
  •  
  • 7. Park CH, Wu JP, Park HS, Kim SK, J. Coat. Technol., 69(875), 41 (1997)
  •  
  • 8. Park HS, Park EK, Kim SK, Chung KT, Polym.(Korea), 19(1), 19 (1995)
  •  
  • 9. Mark HF, Bikales NM, Overberger CG, Menges G, Kroschwitz JIEncyclopedia of Polymer Science and Engineering, 2nd ed., vol. 13, p. 259, Wiley, New York, 1989 (1989)
  •  
  • 10. Union Carbide Co., Tone Polyols for High-Performance Coatings, Adhesives, and Elastomers, 2nd ed., p. 1, Union Carbide Chem. & Plastics Tech. Co., New York, 1989 (1989)
  •  
  • 11. Ginger GM, J. Coat. Technol., 67(841), 31 (1995)
  •  
  • 12. Charles AZ, Kimberly DT, J. Coat. Technol., 68(856), 49 (1996)
  •  
  • 13. Park EKPh.D. Dissertation, Myong Ji Univ., Seoul, Korea, 1993 (1993)
  •  
  • 14. Pouchert CJThe Aldrich Library of Infrared Spectra, 2nd ed., Aldrich Chemical Co., Milwaukee, 1975 (1975)
  •  
  • 15. Fresenius W, Huber JFK, Pungor E, Rechnitz GA, Simon W, West SSpectral Data for Structure Determination of Organic Compounds, 2nd ed., Springer-Verlag, Berlin, 1989 (1989)
  •  
  • 16. Kim SK, Chung KT, Park HS, J. Korean Oil Chem. Soc., 12(1), 19 (1995)
  •  
  • 17. Mark HF, Bikales NM, Overberger CG, Menges G, Kroschwitz JIEncyclopedia of Polymer Science and Engineering, vol. 1, p. 656, Wiley, New York, 1985 (1985)
  •  
  • 18. Shin JH, Kim SG, Ha KJ, Park HS, J. Korean Ind. Eng. Chem., 8(6), 907 (1997)
  •  
  • 19. Hong ESM.S. Dissertation, Myong Ji Univ., Yongin, Korea, 1996 (1996)
  •  
  • 20. Dijk JHContinuous Measurement of Stoving Film Properties During Thermal Curing with Melamines, in Advances in Organic Coatings Science and Technology, vol. 4, p. 72, Technomic Publishing Co. Inc., Westport, 1982 (1982)
  •  
  • 21. Nakamichi T, Ishidoya M, J. Coat. Technol., 60(766), 33 (1988)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2000; 24(1): 72-81

    Published online Jan 25, 2000