The Properties of Different Polyols for Paint to Polyisocyanate

도료용 폴리올 종류에 따른 폴리이소시아네이트와의 물성

  • Seo, Seok-Hwan (Department of Industrial Chemistry, Pukyong National University) ;
  • Suh, Cha-Soo (Department of Industrial Chemistry, Pukyong National University) ;
  • Park, Jin-Hwan (Department of Industrial Chemistry, Pukyong National University)
  • 서석환 (부경대학교 응용화학공학부 공업화학과) ;
  • 서차수 (부경대학교 응용화학공학부 공업화학과) ;
  • 박진환 (부경대학교 응용화학공학부 공업화학과)
  • Received : 2008.08.20
  • Accepted : 2008.09.08
  • Published : 2008.10.10

Abstract

To achieve the ideal performances of paint film, resins and hardeners have to be chosen and designed in a proper way depending on the exposure circumstance of substrate and the requested physical properties. Six different kinds of clear paints were made in this experiment using alkyd polyol, polyester polyol, polyester modified acrylic polyol and another 3 acrylic polyol resins whose $T_g$ and OH value were partially modified. Then the tests for chemical, physical, and mechanical properties were measured after forming the paint films using aliphatic and aromatic polyisocyanate. The viscosity and elasticity of paint film were then measured in terms of gel point and $tan{\delta}$ using Rheometer and DMA. Through this viscoelastic characteristic test of polyurethane resin, we were able to choose the adequate resins and hardeners which are the most important in the top and primer painting system of urethane paint and, as a result of observing the physical, mechanical, and chemical properties of paint film by urethane, we have finally reached the conclusion that we could apply the proper polyol to top and primer paint for developing the polyurethane paint system.

Keywords

polyol;rheometer;DMA;$T_g$;OH value;polyurethane

Acknowledgement

Supported by : 조광페인트 기술연구소

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