Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Preparation and Physical Properties of PU Flame-Retardant Coatings Using Modified Polyester Containing Phosphorus/Chlorine and APT-Trimer

인과 염소 함유 변성폴리에스테르와 APT-Trimer에 의한 PU 난연도료의 제조 및 도막물성

  • Park, Hong-Soo (Department of Chemical Engineering, Myongji University) ;
  • Jo, Hye-Jin (Department of Chemical Engineering, Myongji University) ;
  • Shim, Il-Woo (Department of Chemical Engineering, Myongji University) ;
  • Hahm, Hyun-Sik (Department of Chemical Engineering, Myongji University) ;
  • Kim, Seung-Jin (Korea Institute of Construction Materials) ;
  • Sung, Ki-Chun (Department of Chemical Engineering, Dae-Jin University)
  • 박홍수 (명지대학교 공과대학 화학공학과) ;
  • 조혜진 (명지대학교 공과대학 화학공학부) ;
  • 심일우 (명지대학교 공과대학 화학공학부) ;
  • 함현식 (명지대학교 공과대학 화학공학부) ;
  • 김승진 (한국건자재시험연구원) ;
  • 성기천 (대진대학교 공과대학 화학공학부)
  • Published : 2005.09.30
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Abstract

To maximize a synergy effect in flame-retardancy of flame-retardant coatings, phosphorus and chlorine were introduced in polymer chains. Two-components PU flame-retardant modified polyesters (ABTTC-10C, -20C, -30C) were prepared by curing, at room temperature, of isocyanate (allophanate-trimer) and prepared modified polyesters which contain phosphorus and chlorine. To examine the film properties of the prepared flame-retardant coatings, film specimens were prepared with the prepared coatings. The film properties of ABTTC, ABTTC-10C and ABTTC-20C, which contain 0, 10 and 20wt%, 2,4-dichlorobenzoic acid (2,4-DCBA), respectively, were proved to be good, whereas the film properties of ABTTC-30C, which contains 30wt% 2,4-DCBA, were proved to be a little bit poor. Two kinds of flame retardancy tests, $45^{\circ}$Meckel burner method and LOI method, were performed. With the $45^{\circ}$Meckel burner method, three flame-retardant coatings except ABTTC showed less than 3.4 cm of char length, and showed less than 2 seconds of afterflaming and afterglow. From this result, the prepared flame-retardant coatings were proved to have the 1st grade flame retardancy. With the LOI method, the LOI values of the coatings containing more than 10wt% 2,4-DCBA were higher than 30wt%, which means that the coatings possess good flame-retardancy. From these results, it was found that synergistic effect in flame-retardancy was taken place by the introduced phosphorus and chlorine.

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References

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