DOI QR코드

DOI QR Code

Open-Cell Rigid Polyurethane Foam Using Reactive Cell Opening Agents

반응성 기포개방제를 이용한 개방기포형 경질우레탄폼

  • Ahn, WonSool (Department of Chemical Engineering, Keimyung University)
  • 안원술 (계명대학교 화학공학과)
  • Received : 2013.04.22
  • Accepted : 2013.05.09
  • Published : 2013.05.31

Abstract

Cell opening characteristics dependent on the cell openers for the conventional formulation of a closed-cell polyurethane foam (PUF) was studied using 1-butanol and lithium salt of 12-hydroxystearic acid (Li-12HSA) as the reactive cell opening agents. While cell openining content of only 10.5 % was obtained for the sample with 4 phr of 1-butanol as the single reactive cell opener, that of 98.0% could be obtained for the sample with 2 phr of Li-12HSA as the reactive co-cell opener. As the results, it showed that a fully open-cell rigid PUF could be obtained by introducing a novel reactive cell opener, having a functional group able to form a bulky side-chain on the urethane networks, without severe loss of mechanical properties of the closed-cell PUF like cell size, bulk density, and thermal conductivity.

일반적인 독립기포형 경질폴리우레탄 폼을 만들기 위한 formulation으로부터 개방기포형 경질 우레탄 폼을 얻기 위하여 반응성 기포개방제로서 1-butanol 및 12HSA (12-hydroxystearic acid)의 금속염인 Li-12HSA를 첨가제로 사용하여 만들어진 샘플의 물성과 기포개방 특성에 관한 연구를 진행하였다. 4.0 phr의1-butanol을 단독으로 사용할 때에 비하여 2 phr의 Li-12HSA를 복합하여 사용할 때의 기포개방율은 10.5%에서 98.0%로 현저한 개선효과를 나타내었다. 연구의 결과로서, 반응에 의하여 부피가 큰 막대형 분자를 우레탄 측쇄로 도입함으로서 독립기포형 경질 우레탄 폼의 기포크기나 밀도, 및 열전도율 등의 큰 변화없이 완전 개방기포형 경질 우레탄 폼을 얻을 수 있음을 보여주었다.

Keywords

References

  1. J. Grimminger and K. Muha, "Silicone Surfactants for Pentane Blown Rigid Foam", Journal of Cellular Plastics, 31(1), pp. 48-72, 1995. DOI: http://dx.doi.org/10.1177/0021955X9503100104
  2. J. Grimminger, "New Additive Solutions for Rigid Polyurethane and Polyisocyanurate. Lamination Foams", Proceedings of the 1999 RAPRA Catalysts and Surfactants in Polyurethane Foams Conference, 18(3), pp. 175-195, 1999.
  3. S. N. Singh, "Blowing Agents for Polyurethane Foams", ChemTec Publishing, Toronto, Ch. 4, pp. 11-22, 2002.
  4. G. Oertel, ed., "Polyurethane Handbook", 2nd ed, Hanser Publishers, N. Y., Ch. 6., pp. 247-328, 1993.
  5. M. Szycher, "Szycher's Handbook of Polyurethanes", CRC Press, N. Y., Ch. 8, pp. 1-46, 1999.
  6. D. Randall and S. Lee, ed., " The polyurethanes book", John Wiley & Sons, Ltd., N. Y., Ch. 15, pp. 229-244, 2002.
  7. K. Yoshida, "Polyurethane and Related Foams", CRC Press, FL, Ch. 4, pp. 65-96, 2007.
  8. U. Henri, "Chemistry and Technology of Isocyanate", John Wiley & Sons, N. Y., Ch. 2, pp. 469-481, 1996.
  9. Takeda Chemical Industries, Ltd, "Production and Use of Open Cell Rigid Polyurethane Foam", U.S Patent No. 5,350,777, 1999.
  10. X. D. Zhang, H. T. Davis, and C. W. Macosko, "A New Cell Opening Mechanism in Flexible Polyurethane Foam", J. Cellular Plas., 35, pp. 458-476, 1999. https://doi.org/10.1177/0021955X9903500506
  11. Samsung Electonics Co. Ltd., "Open Cell Rigid Polyurethane Foam and Method for Producing the Same and Method for Making Vacuum Insulation Panel Using Same", U.S Patent No. 5,889,067, 1999.
  12. T. Heinemann and W. Klan, "Fine Cell, Water -Blown Rigid Polyurethane Foams", U.S 2005/0014857 A1, 2005.