Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Flame Retardancy and Physical Properties of Flame-Retardant PU Coatings Containing Aliphatic and Aromatic Isocyanates

지방족 및 방향족 이소시아네이트를 함유하는 PU 난연도료의 도막물성과 난연성 비교

  • 김성래 (명지대학교 공과대학 화학공학과) ;
  • 박형진 (명지대학교 공과대학 화학공학과) ;
  • 함현식 (명지대학교 공과대학 화학공학과) ;
  • 황용현 (동아인재대학 공학계열) ;
  • 박홍수 (명지대학교 공과대학 화학공학과)
  • Published : 2002.03.31
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Abstract

Two PU flame-retardant coatings, 2,3-DBPO/N-l00 (DBPON) and 2,3-DBPO/IL (DBPOI), were prepared by curing 2,3-dibromo modified polyester (2,3-DBPO) with isocyanate curing agent Desmodur N-l00 (or Desmodur IL) at room temperature. The physical properties and flame-retardancy of the two coatings were tested and compared. As a result, the pot-life, yellowness index, lightness index difference, $60^{\circ}$ specular gloss, cross-hatch adhesion, viscosity, and accelerated weathering resistance of DBPON were better than those of DBPOI; the fineness of grind of the two coatings were the same; and the drying time, hardness, and abrasion resistance of DBPOI were better than those of DBPON. The flame retardancy of the flame-retardant coatings increased with the content of the flame retarding component, 2,3-dibromopropanoic acid (2,3-DBP); and the LOI values of the two coatings were in a range of $27{\sim}29%$ when the content of 2,3-DBP was 30wt%.

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